CA2091445A1 - Retaining mechanism for a tooth assembly - Google Patents
Retaining mechanism for a tooth assemblyInfo
- Publication number
- CA2091445A1 CA2091445A1 CA002091445A CA2091445A CA2091445A1 CA 2091445 A1 CA2091445 A1 CA 2091445A1 CA 002091445 A CA002091445 A CA 002091445A CA 2091445 A CA2091445 A CA 2091445A CA 2091445 A1 CA2091445 A1 CA 2091445A1
- Authority
- CA
- Canada
- Prior art keywords
- pin
- conical spring
- retaining mechanism
- spring washer
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
- E02F9/2841—Retaining means, e.g. pins resilient
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Dental Prosthetics (AREA)
Abstract
Retaining mechanisms are normally utilized for securing a tooth to an adapter. Many times the forces necessary to secure the retaining mechanism in an assembled position is not high enough to maintain assembly during use. In the subject arrangement, the retaining mechanism (16) includes a pin (40) having a means (60) thereon for forming a shoulder and a plurality of conical spring washers (42, 44, 46) each having an inner surface (52) defining an opening (53) having a diameter of a predetermined size which is smaller than the outer diameter of the shoulder means (60). During assembly, the shoulder means (60) of the pin (40) is forced through the opening (53) of the respective conical spring washers (42, 44, 46) from a concave side (48) thereof. In order to disassemble the pin (40), the shoulder means (60) of the pin (40) must be forced through the respective openings (53). In instances where the pin (40) must be removed from the same side that it is installed, a much higher force is required to force the shoulder means (60) through the opening (53) of the respective first, second, and thrird conical spring washers (42, 44, 46). Consequently, a retaining mechanism (16) is provided which has very high resistance to inadvertent disassembly during use.
Description
_ W093/05~ PC~ 5281 2~9~4~
RETAINING MECHANISM FOR A TOOTH AssEMsLy Technical_Field This invention relates generally to a tooth assembly and more particularly to a r~taining mechanism for the tooth assembly.
sackq_ und Art Various types o~ retaining mechanisms are used to retain, for example, a tooth to an adapter.
When using a retaining mechanism to retain the tooth to the adapter, it is desirable to be able to readily install the retaining mechanism and have the retaining mechanism remain in lts assembled position without inadvertently coming apart during use. When, durin~
use, a retaining mechanism allows the tooth to ~:
separa~e from the adapter, the tooth may accidentally be loaded with the materials being worked and cause damage to the equipment that is subsequently processing the material being worked.
One typical example of a retaining mechanism used is illustrated in U.S. Patent No. 3,959,901, which issued June 1, 1976 to G. R. Klett. This arrangement teaches a pin that is inserted through .:
corresponding holes of a tooth and adapter and a split spring washer that is inserted in a counterbored hole in the adapter and the pin is forced to slide through the split spring washer. The clamping force of the ::
split spring washer on the pin maintains the pin in its assembled position. In this arrangement, the ~orce.necessary to install the pin is generally equal to or greater than the force requlred to disassemble .
: . ::
W093/05~ RCT/U.~.Q'~g~
2~9 ~4~ -2-the retaining mechanism. Furthermore, the retainin~
force is only as strong as the clamping force exerted by the split sprin~ washer. Another example is illustrated in U.S. Patent No. 3,601,911, which issued August 31, 1971 to D. L. Wood. This arrangement is similar to the previous noted arrangement, except this arrangem2nt provides two separate pins, one extending from each sidet and having a groove in the pin for the split spring washer to rest. The force necessary to assemble the retaining mechanism of this arrangement appears to be generally the same as the force necessary to disassemble the retaining mechanism.
Another example is illustrated in U.S.
Patent No. 5,009,017, which issued April 23, 1991 to M. S. Diekevers et al. This arrangement is si~ilar to the above-noted arrangements in that a pin is used to hold the tip to the adapter. A washer is located in a counterbored hole of the adapter and has a split resilient retaining ring disposed in an inner sur~ace o~ the washer and the pin has a grooved defined in the circumference thereof. When assembled, the split resilient retaining ring is expanded and once the groove of the pin reaches the location of the split resilient retaining ring, the retaining ring snaps into the groove to the extent that a portion o~ the retaining ring is in the groove and a portion thereo~
remains in the washer. Upon disassem~ly/ it is necessary to apply a sufficient force to either shear the split resilient retaining ring or fracture the washer in order to allow the pin to be removed.
U. S. Patent 4,006,661 which issued February 8, 1977 to D. M. Sims, Jr. il}uætrates a typical use of conical spring washers. The conical washers are used to provide a continuous separating . :
W093/OS~S P~T/U~2~
.
~3~ 2~9~4~5 force on a mechanical connection onc~ they have been forced towards a flattened shaped.
The presant invention is directed to overcoming one or more of the problems as set forth above.
Disclosure Qf the Invention In one aspect of the pre~ent invention, a retaining mechanism is provided and adapted for use in securing a yround engaging tool to a work implemen~.
The ground engaging tool has a rearward end portion defining a socket and first and second openings de~ined in the end portion on opposite sides of the socket. The work implement has a nose portion adapted ,.
to mate with the socket and defines a cross passage that registers, when assembled, with the aligned openings of the ground engaging tool. An annular recess having a bottom surface is defined in the nose portion or one side of the rearward end portion and is concentric wi~h the cross passage or the aligned openings. The retaining mechanism includes a conical spring washer defining an opening having a predetermined diameter and being adapted, when assembled, to be located in the annular recess and a pin adapted, when assembled, to be located in the aligned openings, the cross passage, and the opèning of the conical spring washer. The conical spring washer has a concave side, a convex side, and an inner surface. The pin has a predetermined diameter and includes means for forming a shoulder thareon. When as~embled, the shoulder means is disposed in the annular recess adjacent the convex side of the conical spring washer.
In another aspect of the present invention, a tooth assembly is provided and includes a ground - - . . . .
W093/05~5 PCT~
2~ 9~ 4_ engaging tool, a work implem~nt, and a retaining mechani~m. The ground engaging tool has a rearward end portion defining a socket and first and second aligned openings defined therein on opposite sides of the socket. The work implement has a nose portion that is operative to mate with the socket o~ the ground engaging tool. ~ cross passage is defined in the nose portion and i~ generally in axial align~ent with the aligned openings. An annular recess is de~ined in one side o~ the nose portion and is concentric with the cross passaye. The retaining mechanism includes a conical spring washer having a concave side, a convex side, an outer peripheral edge on the convex side, and an inner surface defining a~
opening o~ a predetermined diameter, and a pin having a predetermined diameter. The pin includes means for forming a shoulder thereon. ~he conical spring washer is located in the annular recess and the pin is disposed in the aligned openings, the cross passage, and the conical spring washer. The shoulder means is located adjacent the convex side of the conical spring washer.
The present invention provides a retaining mechaniæm that can be readily assembled with a predetermined force and has a retaining force that i~
normally higher than the assembly force. This ensures that the pin is positively held in place during use and still allows disassembly by applying a higher force thereto than that required to assemble the retaining mechanism.
Brief Description of the Drawinas Fig. 1 is an isometric representation of a retaining mechanism for a tooth asse~bly incorporating an embodiment of the present invention;
, . .
., . . :: : .
: :
W0~3/0~ P~T/~J,~
~5~ 2~9144~
Fig. 2 is a partial cross-sectional view taken from Fig. 1 with the co~ponents of Fig. 1 being a~sembled;
Fig. 3 is an enlarged partial cross-sectional view of the retaining mechanism of ~ig. 2;
Fig. 4 is a partial sectional Yiew similar to Fig. 3 but representing another embodiment of ~he present invention;
Fig. 5 is a partial cross-sec~ional view similar to Fig. 3 above but representing another embodiment of the present i~vention;
Fig. 6 is a partial cross-sectional view similar to Fig. 3 above but representing another embodiment of the present invention; and Fig. 7 is a partial cross-sectional view similar to Fig. 3 above but representing another embodiment of the present invention.
Best Mode for Carrvinq Out the In~ention Referring to the drawings, and more particularly to ~igs. 1, 2, and 3, a tooth assembly 10 is illustrated. The tooth assembly 10 includes a work element 12, a ground engaging tool 14, and a retaining mechanism 16. ~he work implement ~2 includes a nose portion 18 defining a cross passage 20 therein. An annular recess 22 having a bottom surface 24 is defined in the nose portion 1~ and concentric with the cross pas aqe 20.
The ground engaging tool 14 has a rearward end portion 28 operative to snugly mate with the nose por~ion 18 of the work implement 12. A socket 30 is defined in the rearward end portion 28 and first and second aligned openings 32,34 are defined in the .
, . . .
~ ~ ,, , ~ , ... .. .
. .
:. , .. : . . . .
WO 93/0~i245 Pcl`/us92~5?-~
2 ~ 9~ 4 ~ -6-rearward end portion 28 with th2 aligned openings 32,34 being on opposite sides o~ the socket 30.
The retaining mechani~m 16 includes a pin 40 having a predetermined diameter and first, second, and third conical spring washers 42,44,46. The first conical spring washer has a concave side 48, a convex sid~ 50, an inner surface 52 defining a opening 53 having a predetermined diameter and an outer peripheral edge 54 on the convex side 5Q thereof. The second and third conical spring washers 44,46 are substantially identical to the first conical spring washer 42. Therefore, element numbers relating ko features of the first conical spring washer 42 are the same for the second and third conical spring washers 44, 46. When assembled, each of the conical spring washers 42,44,46 is located in the annular recess 22 of the nose portion 18 and each has its convex side 50 facing towards the bottom surface 24 of the annular recess 22.
The pin 40 has a longitudinal axis 58 and includes means 60 for ~orming a shoulder thereon. A
first portion 62 of the pin having the predetermined diameter defines a groove 64 in the circumference thereof generally adjacent one end thereof. A
plurality of individual adjacent ridges 66 are located generally in the bottom of the groove 64 and the respective ridges 66 are angled relative to the longitudinal axis 58 thexeof to form the respective shoulders 68. The outer diameter of the respective houlders 68 is greater than diameter of the opening 53 defined by the inner surface 52 of each o~ the first, second, and third conical spring washers 42,44,46.
A second portion 70 of the pin 40 has a diameter ~maller than the opening 53 of the first, W093/OSa4~ PCT/I.J~2, .~ .'. ~ . I
~7- i 2~14~LS
second, and third conical spring washer 42,44,46, and is operative, when assembled, to be disposed in the cross passage 20 and the ~econd aligned opening 34.
The first portion 62 of the pin 40, when assembled, is located in the first aligned opening 32 and the annular recess 22. The diameter of the cross passage 20 is s~aller than the diameter of the first portion 62 of the pin 40. When assembled, the conv~x side of the firs~, second, and third conical spxing washers 42,44,46 faces the second portion 70 of the pin ~0.
A means 74 for supporting the first conical spring washer 42 is provided and located in the annular recess 22 of the nose portion 18. The supporting means 74 includes a hollow support member .:
76. The hollow support member 76 has a longitudinal axis 78 which is generally parallel to the longitudinal axis 58 of the pin 40. A ~irs~ suxface 80 is provided on ~he support member 76 and is perpendicular to the longitudinal axis 78. A second sur~ace 82 is provided on the hollow support member 76 and is angled with respect to the longitudinal axis 78 at generally a 45 degree angle. The hollow support member 76 is located in the annular recess 22 with the ~irst surface 80 o~ the hollow support member 76 being in contact with the bottom surface 24 of the annular recess 2~. During assemblyJ the angled second urface 82 is engaged by and supports the outer peripheral edge 54 of the ~irst conical sprin~ washer 42.
Referring now to Fig. 4, another embodiment of ~he subject invention is illustrated. The embodiment o~ Fig. 4 is substantially the same as the embodiment of Fig. 3 and like elements have the same reference numerals. The groove 64 o~ Fig. 4 has a diameter that is smaller than the diameter of the opening 53 of the first, second, and third conical . . : ;. .
. , .. ' ' : :' ~ :, ` , - , . ' ' ~ , ., :: ' , ,. ` :
wO93to5~5 '2 ~ 91~ 8- PcT/us~ p~?~a spring washers 42044,46. The width o~ the groove 64 is sufficient to receive the first, s~cond, a~d third conical spring washers 42,44,46. The shoulder 68 in the subject embodiment is formed by one side of the groove 64. The outer diameter o~ the shoulder 68 is the same as the predetermined diameter of the ~irst portion 62 of the pin 40. The remainder of the embodiment of Fig. 4 is the same as that illustrated in ~igs. 1-3~
Referring to Fig' 5~ another embodiment of the present invention is illustrated. In th~ subject arrange~ent of Fig. 5, the first portion 62 and the second por~ion 70 of the pin 40 are both of the same size and both have the same predetermined diameter.
Furthermore, the first and second aligned openings 32,34 are of the same ~ize sufficient for the pin 40 to pass therethrough. The features of the groove 64 of the subject embodiment are the same as that set foxth in Fig. 4. Likewise, the shoulder 68 is formed in the same manner as the shoulder 68 of Fig. 4. In order ~or the first portion 62 and the second portion 70 to have the same predetermined diameter, the cross passage 20 and the second aligned opening 34 are increased in size to be generally the same as the first aligned opening 32. The remaining components are the sam~ as those set forth in the previous embodiments.
Referring now to Fig. 6, another embodiment of the present invention is illustrated. In the arrangement of Fig. 6, most of the e}ements are identical to those set forth in the previous embodiments. The pin 40 of Fig. 6 is an offset pin.
More specifically, a second longitudinal axis 86 is defined in the second portion 70 and i5 offset from the longitudinal axis 58 of the first portion 62. The W~93/~ ~ PCT/US9~
~9 2 ~ 9 1 4 4 ~
longitudinal axis 86 is parallel with the longitudinal axis 58. The degree of offset between the first longitudinal axis S8 o~ the first portion 62 and the second longitudinal axis 86 of the second portion 70 5 is su~ficient to insure that the first and ~econd ::
portions 62,70 are in a common plane along a portion of the r~spective circumferences thereof. The cross passage 20 and the second aligned opening 34 are smaller in cross-section than the first portion 62.
Naturally, the first aligned opening 32 is larger than the first portion 62. The ~roove 64 is the same as that previously set forth with respect to Figs. 4 and 5 and the shoulder ~8 is formed in the same manner.
Referring to Fig. 7, another embodiment of ~he subject inven~ion is illustrated. In the arrangement of Fig. 7, the pin 40 has an enlarged portion 88 thereo having a diameter larger than the predatermined diameter of the pin 40. The enlarged portion 88 is located generally adjacent one end of the pin 40 thereof. The shoulder 68 is formed by the intersection of the enlarged portion ~8 and the surface of the first portion 62 of the pin 40. In the subject embodiment, the enlarged portion 88 of the pin 40, when assembled, is located in the annular recess 22 between the cross passage 20 and the first conical spring washer 4~. The cross passage 20 has a diameter smaller than the diameter of the first aligned opening 32 and the outer diameter of the enlarged portion 8 is smaller than the diameter of the first aligned opening 32.
In the subject arrangement of Fig. 7, the means 74 for supporting the first conical spring washer 42 during asse~bly is integrally ormed in the annular recess 22. An angled surface 90 is ~ormed in the bottom portion of the annular recess 22 adjacent - : :; . . .
W093/05245 PCT/USg2/~S~
209~4~ -lO-the bottom ~ur~ace 24 and at an angle o~ generally 45 degrees therewith. When considering the previous embodiment ~et forth in Figs. 3 6, it is recognized that instead of having the hollow support member 76 5 . located in the annular recess 22, the structure illustrated in Fig. 7 could be utilized in any one o~
the preceding embodimentsO Likewise, the hollow support member 76 of the previ~us embodiments could be utilized in Fig. 7 in place of the angled surface 90 without departing from the essence of the invention.
one aspect of the present invention provides - a tooth assembly 10 wherein the retaining meohanism 16 can be easily ins~alled with a lower force while a larger ~orce is necessary to disassemble the retaining mechanism. In all o~ ~he above-noted embodiments, there is a relationship between the diameter of the opening 53 of each o~ the first, second, and third conical spring washers 4~,44,46, and the outer diameter of the shoulder ~ that is forced through the opening 53. Generally, the outer diameter o~ the shoulder 68 in each of the above-noted embodiments is two to five percent greater than the diameter of the opening 53 of the respective first, second, and third conical spring washers 42,44,46. Preferably, the outer diameter of the respective shoulders 68 is three - to four percent greater than the diameter of the opening 53.
Even though the cro-qs passage 20 and the aligned openings 32,34 have been indicated as having diameters! it is recognized that their shapes could be varied without departing from the essence of the invention.
.: ` .
. .
W093/05245 Pcr/~ss2~os2~l i ` -11- 209~4~
Industrial Appl icab~l~ity In order to assemble the tooth assembly 10 as illustrated in ~igs. 1-6, the hollow support me~ber 76 is placed in the annu}ar recess 22 with the first ~urface 80 thereof being placed in abutment with the bottom surface 24 o~ the annular recess 20. The first, second, and third conical spring washers 42,44,46 are then placed in the annular recess adjacent the hollow suppsrt member 76. Each of the first, second, and third oonical spring washers 42,44,46 are placed adjacsnt each other with the convex side of each facing towards the hollow support member 76. The socket 30 of the ground engaging tool 14 is slipped over the nose portion 18 until the first and second aligned openings 32,34 ar2 in align~ent with the cross passage 20 and the annular recess 22.
The second portion 70 of the pin 40 is inserted into the first aligned passage 32 through the first, second, and third conical spring washers 42,44,46 and into the cross passage 20 until the larger first portion 62 o~ the pin 40 contacts the concave side 48 of the third conical spring washer 46. An external force is applied to the exposed end of the first portion 62 of the pin 40 forcing each of the first, second, and third conical spring washers 42,44,46 to flex. Since the outer peripheral edge 54 of the first conical spring washer 42 is in contact with the angled second surface 82 of the hollow support member 76 and the external force is being transmitted to the concave side 48 of the third conical washer 46, the ~irst, second, and third conical spring washer~ 42,44,46 are forced to fl~x. The flexing of the respective firs~, second, and third conical spring washers 42,44,46 results i~ a shape that is more convex.
Simultaneously with the flexing of the first, second, W093/05~ PCT/~
2091~ 12-and third conical spring washers 42,44,46, the diameter of the respective openings 53 thereof is enlarged allowing the inner surface 52 to slip over the respective shoulders 68 of the plurality of ridges ~6. The exter~al force is continuou~ly applied to the pin 40 until the inner surface 52 of each of the first, second, and third.conical spring washers 42,44,46 is located in abutment with the respective angled ridges 66 of the groove 64. At this point, the pin 40 is fully assembled and the second portion 70 has extended into the second aligned opening 34. Once the external force is withdrawn, the first, second, and third conical spring washers 42,44,46 attempt to return to their oriqinal shape. In the subject embodiment, best illustrated in Fig. 3, the inner surface 52 of each of the first, second, and third conical spring washers 42,44,46 are tightly pressed against the respective ridges 66 thereof. However, it should be recognized that the diameter of the angled ridges 66 could be such that the first, second, and third conical spring washers 42,44,46 could return to their original shape an~ not be tightly pressed against the ridges 66 without departing from the essence of the invention.
Since the first portion 62 of the pin 40 has a diameter greater than the diameter of the cross pascage 20, the first portion 70 of the pin 40 cannot be ~orced through the tooth assembly 10 in a direction fro~ the first aligned passage 32 towards the second aligned passage 34. Consequently, the only way that the pin 40 can be removed fro~ the tooth assembly 10 is in the direction from the second aligned opening 34 towards the ~irst aligned opening 32.
In the event, the pin 40 attempts to move in a direction from the second aligned opening 34 towards . .
, W0~3/0~ PCT/US92tO5~1 -13- ~ , 2 ~ 91~ 4 ~
the first aligned opening 32, the third conical spring washer ~6 contacts the inside wall of the socket 30 of the ground engaging tool 14. Further attempts of movement in this direction results in the first, second, and ~hird coni~al sprins washers 42,44,46 being forced to change toward~ a shape that is glat.
As the ~irst, æecond, and third conical spring washers 42,44,46 are being ~lattened, the diameter o~ the inner surfac~ 52 attempts to become smaller. As the ~o diameter o~ the inner surface 52 is attempting to become smaller, a gxeater compressive force is applied to the respective angled ridges 6~ thus further inhibiting the inner surface 52 from slipping over the respective shoulders 68. The subjeot arrangement can :
withstand a very high force without inadvertently becoming disassembled.
In order to remove the pin 40 from its assembled position, a force is applied to the end of the second portion 70 of the pin 40 adjaaent the second aligned opening 34 to move the pin 40 in a direction from the second aligned opening 34 towards the fixst aligned openiny 32. This external force must be su~ficiently high to force the diameter of the openings 53 to expand in order for the inner surfaces 52 to slip over the shoulders 68 thereof. Once the first, second, and ~hird conical spring washexs have been forced to slip over the respective shoulders 68 , and are i~ a position that the inner surface 52 is located around the second portion 70 of the pin 40, the pin ~0 can easily be moved the remainder of the distance for disassembly.
Re~erring to the embodime~t set ~Qrth in Fig. 4, th~ assembly o~ the hollow support member 76 and the first, second, and third conical spring washers ~2,44,46 into the annular recess 2i and the ,-..... : . : . . . . .
.
~ . :
Wo~3/os~s P~T~US~O.~
2 ~ 5 -14-subsequent mounting of the ground engaging tool 14 onto the nose portion 13 is the same as ~hat ~et forth above with respect to Figs. 1-3. The second portion 70 of the pin 40 o~ the subject embodiment is inserted into the first aligned opening 32 through the ~irst, second, and third conical spring`washers 42,4~,46 and into the cross passage 20 until the larger first portion 62 thereof contacts the third conical spring washer 46 adjacent the inner ~urface 52 thereof. At this point, an external force is applied to ~he end of the first portion 62 of the pin 40 forcing it in a direction towards the second aligned opening 34. As the pin 40 is being forced in a direction towards the second aligned opening 34, the diameter of ~he inner surface 52 is being ~orced to expand to a larger diameter in order to slip over the predetermined dia~eter o~ the pin 40. In the subject embodiment, the predetermined diameter of the pin 40 is the outer diameter of the shoulder 68. The pin 40 is continually forced in the direction towards the second aligned opening 34 until the inner surface 52 of each of the first, second~ and third conical spring washers 42,44,46 is located in the ~roove 64. As set forth ~bove, with respect to Figs. 1-3, the first, second, and third conical spring washers 42,44,46 are caused to flex as a result of the outer peripheral edge 54 of the first conical spring washer 42 being in contact with the angled second surface ~2 of the hollow support member 76. This flexing of the first, second, and third conical spring washers 42,44,46 aid in the diameter of the openings 53 thereo~ expanding to a larger size. Once the inner surfaces 52 cf the first, second, and third conical spring washers 42,44,46 are located in the groove 64, they return to their initial shape. In the subject embodiment, the diameter of the .
,, , ~, :
.
. .
~WOg3/0~245 PCT/~S~2/~5.~.8 , ~15- 2 ~ 914 4 ~ !
openings 53 are larger than the diameter of the ~roove 64, thus the Pirst, second, and third conical spring washers 42,44,46 are not under any type of load.
Since the diameter of the first portion 62 a~ the pin 40 is greater than the diameter of the cross passage 20 of the nose portion 18, the pin 40 cannot be r~moved in a direction extending from the first aligned opening 32 towards the second aligned opening 34. Any attempts o~ the pin 40 inadvertently becoming disass~mbled in the opposite dirertion is resist2d when the concave side 48 of the third conical spring washer 46 contacts the inside surface of the socket 30 of the ground engaging tool 14. Since the first, se~ond, and third conical spring washers 42,44,46 are progressively flattened during any further movement towards disassembly of the pin 40 and the diameter of the inner surface 52 be~omes s~aller as a result thereof, the subject arrangement can withstand high forces resisting any attempt o~ inadvertent disassembly.
In order to remove the pin 40 from the disassembled position, an external force is applied to .
the end of the -~econd portion 70 of the pin 40 located adjacent the second aligned opening 34 moving the pin 40 in a direction from the second aligned opening 34 towards the first aligned opening 32. The force must be sufficiently high in order to force the diameter o~
the openings 53 o~ the respective first, second, and third conical spring washers 42,44,~6 to expand so that the respective inner surfaces 52 can slip over the shoulder 68. once the pin 40 has been moved in a dirPc~ion gar enough for the first, second, and third conical spring washers 42,44,46 to be located around the second portion 70 o~ the pin 40, the pin 40 may be easily removed thereafter.
:
.. ~ ,. . : .
W093/05~ PCTJUS~
2~ 16-Referring to the embodiment of Fig. 5, the aæsembly of ~he hollow support member 76, the f irst, second, and third conical spring washers 42,44,46, and the ground engaging tool 14 are the same as set forth in the previous embodiments. In this arrangement, the first portion 62 and the second portion 70 of the pin ~0 have the same diameter which is the same as the predet~rmined diameter of the pin 40. In the subject embodim~nt, the second portion 70 o~ the pin 40 is inserted into the first aligned opening 32 until the end of the second portion 70 of the pin 40 contacts the third conical spring washer 4~ adjacent the inner surface 52 thereof. An external force is applied to the end of the first portion 62 forcing the first, second, and third conical spring washers 42,44,46 to flex in the same manner as set forth in the previous embodiments until the diameter of the respective openings 53 thereof are increased to a size sufficient for the predetermined diameter o~ the pin 40 to slip therethrough. The external force is continu~lly applied forcing the pin 40 in a direction towards the second aligned opening 34 until the inner surfaces 52 of the first, second, and third conical spring washers 42,44,46 are located in the groove 64 thereof. As noted with respect to Fig. 4, the diameter of the openings 53 of the first, second, and third conical spring washers 42,44,4~ is larger than the diameter of the groove 64. Consequently, once assembled, the first, second, and third conical spring washers 42,44,46 are in their relaxed condition.
As set forth above, any move~ent of the pin ~0 in a direction f~om the second aligned opening 34 towards the first aligned opening 32 is xesis ed by the contact of the third conical spring washer 46 against the inside wall of the socket 30 of the ground , .. .
, ~
, .
W0~3/05~5 P~T/US92/05~1 -17- ' ~09t~
engaging tool 14. However, in the ~ubject embodiment, since the dia~eters of the first portion 62 and the second portion 70 are the same, the pin 40 can move in :
a direction ~rom the ~irst aligned opening 32 towards the second aligned openin~ 34. ~on~equently, a force equal to the assembly force can be applied to remove the pin 40 in a direction towards the.second alig~ed opening 34. Once the pin 40 is fully removed from the f irst, second, and third conical spring washers 42,44,46, the pin may be easily pulled from the assembly. Conversely, any attempts to remove the pin 40 from the same side that it was installed results in the force being resisted in the same manner as noted with respect to the embodiment of Fig. 4. Even though the removal force could be the same as the assembly ~orce, the assembly force is sufficiently high so that this arrangement could be satisfactorily used in many applications where extremely large external ~orces trying to remove the pin 40 are absent.
. Referring now to Fig. 6, the assembly of the hollow support 76, the first, second, and third conical spring washers 42,44,46 and the ground engaging tool 14 are the same as same as set for~h in the previous embodiments. In the subject embodiment, the second portion 70 of the pin 40 is inserted through the first aligned opening 32, the ~irst, seGond, and third conical spring washers ~2,44,46 and into the cross passage 20 until the larger first portion 62 thereof contacts the third conical spring washer ~6 adjacent the inner surface 52 thereof. The diameter of the openings 53 of the first, second, and third conical spring washers 42,44,46 are forced to expand in the same manner as set forth in the previous e~bodiments. The external force is continually applied until the inner surfaces 52 of the first, . .~, . . . , - ~
; ' . ' ' ' ,: . . .
. :.. ; ~' ' , ' ' , ' ' ,, . . . , . . . ~............... ~
W(:) 93/05~45 PCr/US92/~S281 2~91 445 second, and third spring washers 42,44,46 are located in th~ groo~e 64. Once the inner surfac~s 52 ar~
located in the groove 64, the conical spring washers 42,44,46 return to their fully relaxed condition as previously ~et forth in the above noted e~bodiments.
Since the diameter o~ the first portion 62 of the pin 40 is greater than the diameter of the cross passage 20, the pin 40 cannot be disassembled in a direction ~rom the first alignPd opening 32 towards the second alig~ed opening 34.
As previously noted with respect to previous embodiments, inadvertent attempts of the pin 40 to come out during use is strongly resisted. In order to remove the pin 40 from its assembled position, a force is applied to the end of the second portion 70 of the pin 40 forcing the diameter o~ the respective openings 53 of the f irst, second, and third conical spring washers 42,44,46 to expand until the respective inner surfaces 52 slip over the shoulder 68. Once the pin 40 has been moved to a position that the first, second, and third conical spring washers 42,44,46 are disposed around the second portion 70, the pin 40 can be easily removed~
Referring now to the embodiment set forth in Fig. 7, the assembly o~ the components is quite similar to that set forth in the previous embodiments.
However, in the subject arrangement, there i~ no hollow support member 76 to insert into the annular recess 22 since the structure o~ the nose portion 18 has an angled surface 90 integrally ~ormed therein.
The first, second, and third conical spring washers 42,44,~6 are inserted in the annular recess 22, in the sa~e manner previously set forth, followed by placement of the ground engaging tool 14 over the nose portion l~. ~he pin 40 is inserted into the first ..... . . . .:, . . ................................. .
~ ., .
- . . ' . ' ~ : ':
, . . . :, ::, .. . . .. .
_ W093~5 4 ~ PCT/US9 aligned opening 32 through the first, second, and third conical spring washers 42~44,46 and into the cross passage 20 until the enlarged portion 88 of the pin 40 contacts the concave surface 48 of the third conical spring washer 46 adjacent the inner surface 52 thereof. An external ~orce is applied to the end of the pin 40 forci~g it i~ a direction towards the second aligned opening 34. The first, second, and third conical spring washers 42,44,46 are forced to ~lex in the same manner as set forth in the pr~vious embodiments. The only difference being that the outer peripheral edge 54 o~ the first conical spring washer 42 is in contact with the angled surface 90 as opposed to the angled surfac~ 82 of the hollow support me~ber 76. Once the shoulder 68 formed by the intérsection o~ the enlarged portion 88 and the predetermined diameter of the pin 40 passes through the openings 53 o~ the first, second, and third conical spring washers 42,44,46, each of the ~irst, second, and third conical spring washers 42,44,46 return to their relaxed condition. æince the enlarged portion 88 of the pin 40 has a diameter greater than the diameter of the ~ .
cross passage ~0, the pin 40 cannot be removed in a direction towards the second aligned opening 34. Any attemptsj during use, of the pin 40 trying to inadvertently come out in a direction from the second aligned opening 34 towards the first aligned opening 32 is resisted once the concave surface 48 of the third conical spring washer 46 contacts the inner surface of the socket 30 of the ground engaging tool 14. Further movement of the pin 40 in the direction of the first aligned opening 32, as set forth in previous embodiments, causes the ~irst, second, and third conical spring washers 42,44,46 to flatten, thus .
., -, . ~ .
' ~ ' . ., , - ' . . ', " . ,.~, , ' . ,, ', . , ,. , ,.
W093/05245 2 ~ 9 ~ P~T/~J~ 0 resulting i~ the diameter of the inner sur~ace 32 becoming smaller.
In order to disassemble the pin 40 from its assembled position, a force is applied to the pin 40 at a location adjacent the second aligned opening 34 forcing the pin 40 in a direction towards the first aligned opening 32. The high f~rce is applied in order to ~orce the diameter of the openings 53 of the firsty second, and third conical spring washers 42,44,46, to ~xpand to a size sufficient for the respective inner surfaces 52 to slip over the outer diameter o~ the shoulder 68. Once the enlarged portion 88 passes through the respective first, second, and third conical spring washers 42,44,46, the pin 40 can be easily removed.
In the embodiments set ~orth above, the respective pins 40 are made from an SAE 4140 material heat treated to a hardness o~ Rockwell "C" 40-44.
Thîs material has a yield strength in the range of 1,120 to 1,290 MPa (162,000-187,000 psi), and a modulus o~ elasticity.o~ 200,000 MPa (29,000,000 psi).
~he first, second, and third conical spring washers 42,44,46 are made from a spring steel material having a carbon content in the range of .55-1.05 and is heat treated to a hardness of Rockwell "C" 48-52. This material has a yield strength in the range of 1,470 MPa - 1,690 MPa (213,000-246,000 psi) and a modulus of elasticity approximately the same as the material o~ the pin 40.
The following set forth one example o~ the ~orce~ needed to assemble and~ disassemble at least one arrangement o~ the embodiments set forth above. The test of the example was conducted on the arrangement illustrated ln Fig. 7. The outex diameter of the enlarged portion 88 which is the same as the outer - . .
:
.
W093/05~45 ' PCT/V~92/05281 -21- 2 ~91 ~ ~a diam~ter of the shoulder 6~ is 35 millimeters ~l.377 inches) and the diameter of the openings 53 defined by the inner surfaces 52 of the first, second, and third conical spring washers 42,44,46 is 33.83 millimeters (1.332 inches). In the subject test, a force o~ approximately 40.72 kN (9,150 pounds~ was used to assemble the pin 40. A force of approximately 105.02 kN (23,600 pounds) was used to disassemble the pin 40. It is recognized that the forces necessary to assemble and disassemble the components will vary as the siæes of the pin 40 and the conical washers 42,44,46 varies. Naturally, tooth assemblies lo that are small may require a smaller pin 40 and smaller conical spring washers 42,44,46, and tooth as~emblies that are larger may likewise require a larger pin 40 and larger conical spring washers 42,44,46.
Furthermore, a greater number or lesser number of conical spring washers may be used depending on design criteria.
In view of the ~oregoing, it is readily apparent that the structure o~ the present invention provides a retaining mechanism 16 ~hat can insure that, during use~ the pin 40 is readily secured in its assembled position. Furthermore, the components can be assembled and disassembled without having to shear or ~racture any of the components. It is recognized that in some instances the conical spring washers 42,44,46 may crack or fracture during disassembly thereof.
Other aspec~s, objects, and advantages of this invention can be obtained from a study of the drawings, the disclosure, and the appended claims.
RETAINING MECHANISM FOR A TOOTH AssEMsLy Technical_Field This invention relates generally to a tooth assembly and more particularly to a r~taining mechanism for the tooth assembly.
sackq_ und Art Various types o~ retaining mechanisms are used to retain, for example, a tooth to an adapter.
When using a retaining mechanism to retain the tooth to the adapter, it is desirable to be able to readily install the retaining mechanism and have the retaining mechanism remain in lts assembled position without inadvertently coming apart during use. When, durin~
use, a retaining mechanism allows the tooth to ~:
separa~e from the adapter, the tooth may accidentally be loaded with the materials being worked and cause damage to the equipment that is subsequently processing the material being worked.
One typical example of a retaining mechanism used is illustrated in U.S. Patent No. 3,959,901, which issued June 1, 1976 to G. R. Klett. This arrangement teaches a pin that is inserted through .:
corresponding holes of a tooth and adapter and a split spring washer that is inserted in a counterbored hole in the adapter and the pin is forced to slide through the split spring washer. The clamping force of the ::
split spring washer on the pin maintains the pin in its assembled position. In this arrangement, the ~orce.necessary to install the pin is generally equal to or greater than the force requlred to disassemble .
: . ::
W093/05~ RCT/U.~.Q'~g~
2~9 ~4~ -2-the retaining mechanism. Furthermore, the retainin~
force is only as strong as the clamping force exerted by the split sprin~ washer. Another example is illustrated in U.S. Patent No. 3,601,911, which issued August 31, 1971 to D. L. Wood. This arrangement is similar to the previous noted arrangement, except this arrangem2nt provides two separate pins, one extending from each sidet and having a groove in the pin for the split spring washer to rest. The force necessary to assemble the retaining mechanism of this arrangement appears to be generally the same as the force necessary to disassemble the retaining mechanism.
Another example is illustrated in U.S.
Patent No. 5,009,017, which issued April 23, 1991 to M. S. Diekevers et al. This arrangement is si~ilar to the above-noted arrangements in that a pin is used to hold the tip to the adapter. A washer is located in a counterbored hole of the adapter and has a split resilient retaining ring disposed in an inner sur~ace o~ the washer and the pin has a grooved defined in the circumference thereof. When assembled, the split resilient retaining ring is expanded and once the groove of the pin reaches the location of the split resilient retaining ring, the retaining ring snaps into the groove to the extent that a portion o~ the retaining ring is in the groove and a portion thereo~
remains in the washer. Upon disassem~ly/ it is necessary to apply a sufficient force to either shear the split resilient retaining ring or fracture the washer in order to allow the pin to be removed.
U. S. Patent 4,006,661 which issued February 8, 1977 to D. M. Sims, Jr. il}uætrates a typical use of conical spring washers. The conical washers are used to provide a continuous separating . :
W093/OS~S P~T/U~2~
.
~3~ 2~9~4~5 force on a mechanical connection onc~ they have been forced towards a flattened shaped.
The presant invention is directed to overcoming one or more of the problems as set forth above.
Disclosure Qf the Invention In one aspect of the pre~ent invention, a retaining mechanism is provided and adapted for use in securing a yround engaging tool to a work implemen~.
The ground engaging tool has a rearward end portion defining a socket and first and second openings de~ined in the end portion on opposite sides of the socket. The work implement has a nose portion adapted ,.
to mate with the socket and defines a cross passage that registers, when assembled, with the aligned openings of the ground engaging tool. An annular recess having a bottom surface is defined in the nose portion or one side of the rearward end portion and is concentric wi~h the cross passage or the aligned openings. The retaining mechanism includes a conical spring washer defining an opening having a predetermined diameter and being adapted, when assembled, to be located in the annular recess and a pin adapted, when assembled, to be located in the aligned openings, the cross passage, and the opèning of the conical spring washer. The conical spring washer has a concave side, a convex side, and an inner surface. The pin has a predetermined diameter and includes means for forming a shoulder thareon. When as~embled, the shoulder means is disposed in the annular recess adjacent the convex side of the conical spring washer.
In another aspect of the present invention, a tooth assembly is provided and includes a ground - - . . . .
W093/05~5 PCT~
2~ 9~ 4_ engaging tool, a work implem~nt, and a retaining mechani~m. The ground engaging tool has a rearward end portion defining a socket and first and second aligned openings defined therein on opposite sides of the socket. The work implement has a nose portion that is operative to mate with the socket o~ the ground engaging tool. ~ cross passage is defined in the nose portion and i~ generally in axial align~ent with the aligned openings. An annular recess is de~ined in one side o~ the nose portion and is concentric with the cross passaye. The retaining mechanism includes a conical spring washer having a concave side, a convex side, an outer peripheral edge on the convex side, and an inner surface defining a~
opening o~ a predetermined diameter, and a pin having a predetermined diameter. The pin includes means for forming a shoulder thereon. ~he conical spring washer is located in the annular recess and the pin is disposed in the aligned openings, the cross passage, and the conical spring washer. The shoulder means is located adjacent the convex side of the conical spring washer.
The present invention provides a retaining mechaniæm that can be readily assembled with a predetermined force and has a retaining force that i~
normally higher than the assembly force. This ensures that the pin is positively held in place during use and still allows disassembly by applying a higher force thereto than that required to assemble the retaining mechanism.
Brief Description of the Drawinas Fig. 1 is an isometric representation of a retaining mechanism for a tooth asse~bly incorporating an embodiment of the present invention;
, . .
., . . :: : .
: :
W0~3/0~ P~T/~J,~
~5~ 2~9144~
Fig. 2 is a partial cross-sectional view taken from Fig. 1 with the co~ponents of Fig. 1 being a~sembled;
Fig. 3 is an enlarged partial cross-sectional view of the retaining mechanism of ~ig. 2;
Fig. 4 is a partial sectional Yiew similar to Fig. 3 but representing another embodiment of ~he present invention;
Fig. 5 is a partial cross-sec~ional view similar to Fig. 3 above but representing another embodiment of the present i~vention;
Fig. 6 is a partial cross-sectional view similar to Fig. 3 above but representing another embodiment of the present invention; and Fig. 7 is a partial cross-sectional view similar to Fig. 3 above but representing another embodiment of the present invention.
Best Mode for Carrvinq Out the In~ention Referring to the drawings, and more particularly to ~igs. 1, 2, and 3, a tooth assembly 10 is illustrated. The tooth assembly 10 includes a work element 12, a ground engaging tool 14, and a retaining mechanism 16. ~he work implement ~2 includes a nose portion 18 defining a cross passage 20 therein. An annular recess 22 having a bottom surface 24 is defined in the nose portion 1~ and concentric with the cross pas aqe 20.
The ground engaging tool 14 has a rearward end portion 28 operative to snugly mate with the nose por~ion 18 of the work implement 12. A socket 30 is defined in the rearward end portion 28 and first and second aligned openings 32,34 are defined in the .
, . . .
~ ~ ,, , ~ , ... .. .
. .
:. , .. : . . . .
WO 93/0~i245 Pcl`/us92~5?-~
2 ~ 9~ 4 ~ -6-rearward end portion 28 with th2 aligned openings 32,34 being on opposite sides o~ the socket 30.
The retaining mechani~m 16 includes a pin 40 having a predetermined diameter and first, second, and third conical spring washers 42,44,46. The first conical spring washer has a concave side 48, a convex sid~ 50, an inner surface 52 defining a opening 53 having a predetermined diameter and an outer peripheral edge 54 on the convex side 5Q thereof. The second and third conical spring washers 44,46 are substantially identical to the first conical spring washer 42. Therefore, element numbers relating ko features of the first conical spring washer 42 are the same for the second and third conical spring washers 44, 46. When assembled, each of the conical spring washers 42,44,46 is located in the annular recess 22 of the nose portion 18 and each has its convex side 50 facing towards the bottom surface 24 of the annular recess 22.
The pin 40 has a longitudinal axis 58 and includes means 60 for ~orming a shoulder thereon. A
first portion 62 of the pin having the predetermined diameter defines a groove 64 in the circumference thereof generally adjacent one end thereof. A
plurality of individual adjacent ridges 66 are located generally in the bottom of the groove 64 and the respective ridges 66 are angled relative to the longitudinal axis 58 thexeof to form the respective shoulders 68. The outer diameter of the respective houlders 68 is greater than diameter of the opening 53 defined by the inner surface 52 of each o~ the first, second, and third conical spring washers 42,44,46.
A second portion 70 of the pin 40 has a diameter ~maller than the opening 53 of the first, W093/OSa4~ PCT/I.J~2, .~ .'. ~ . I
~7- i 2~14~LS
second, and third conical spring washer 42,44,46, and is operative, when assembled, to be disposed in the cross passage 20 and the ~econd aligned opening 34.
The first portion 62 of the pin 40, when assembled, is located in the first aligned opening 32 and the annular recess 22. The diameter of the cross passage 20 is s~aller than the diameter of the first portion 62 of the pin 40. When assembled, the conv~x side of the firs~, second, and third conical spxing washers 42,44,46 faces the second portion 70 of the pin ~0.
A means 74 for supporting the first conical spring washer 42 is provided and located in the annular recess 22 of the nose portion 18. The supporting means 74 includes a hollow support member .:
76. The hollow support member 76 has a longitudinal axis 78 which is generally parallel to the longitudinal axis 58 of the pin 40. A ~irs~ suxface 80 is provided on ~he support member 76 and is perpendicular to the longitudinal axis 78. A second sur~ace 82 is provided on the hollow support member 76 and is angled with respect to the longitudinal axis 78 at generally a 45 degree angle. The hollow support member 76 is located in the annular recess 22 with the ~irst surface 80 o~ the hollow support member 76 being in contact with the bottom surface 24 of the annular recess 2~. During assemblyJ the angled second urface 82 is engaged by and supports the outer peripheral edge 54 of the ~irst conical sprin~ washer 42.
Referring now to Fig. 4, another embodiment of ~he subject invention is illustrated. The embodiment o~ Fig. 4 is substantially the same as the embodiment of Fig. 3 and like elements have the same reference numerals. The groove 64 o~ Fig. 4 has a diameter that is smaller than the diameter of the opening 53 of the first, second, and third conical . . : ;. .
. , .. ' ' : :' ~ :, ` , - , . ' ' ~ , ., :: ' , ,. ` :
wO93to5~5 '2 ~ 91~ 8- PcT/us~ p~?~a spring washers 42044,46. The width o~ the groove 64 is sufficient to receive the first, s~cond, a~d third conical spring washers 42,44,46. The shoulder 68 in the subject embodiment is formed by one side of the groove 64. The outer diameter o~ the shoulder 68 is the same as the predetermined diameter of the ~irst portion 62 of the pin 40. The remainder of the embodiment of Fig. 4 is the same as that illustrated in ~igs. 1-3~
Referring to Fig' 5~ another embodiment of the present invention is illustrated. In th~ subject arrange~ent of Fig. 5, the first portion 62 and the second por~ion 70 of the pin 40 are both of the same size and both have the same predetermined diameter.
Furthermore, the first and second aligned openings 32,34 are of the same ~ize sufficient for the pin 40 to pass therethrough. The features of the groove 64 of the subject embodiment are the same as that set foxth in Fig. 4. Likewise, the shoulder 68 is formed in the same manner as the shoulder 68 of Fig. 4. In order ~or the first portion 62 and the second portion 70 to have the same predetermined diameter, the cross passage 20 and the second aligned opening 34 are increased in size to be generally the same as the first aligned opening 32. The remaining components are the sam~ as those set forth in the previous embodiments.
Referring now to Fig. 6, another embodiment of the present invention is illustrated. In the arrangement of Fig. 6, most of the e}ements are identical to those set forth in the previous embodiments. The pin 40 of Fig. 6 is an offset pin.
More specifically, a second longitudinal axis 86 is defined in the second portion 70 and i5 offset from the longitudinal axis 58 of the first portion 62. The W~93/~ ~ PCT/US9~
~9 2 ~ 9 1 4 4 ~
longitudinal axis 86 is parallel with the longitudinal axis 58. The degree of offset between the first longitudinal axis S8 o~ the first portion 62 and the second longitudinal axis 86 of the second portion 70 5 is su~ficient to insure that the first and ~econd ::
portions 62,70 are in a common plane along a portion of the r~spective circumferences thereof. The cross passage 20 and the second aligned opening 34 are smaller in cross-section than the first portion 62.
Naturally, the first aligned opening 32 is larger than the first portion 62. The ~roove 64 is the same as that previously set forth with respect to Figs. 4 and 5 and the shoulder ~8 is formed in the same manner.
Referring to Fig. 7, another embodiment of ~he subject inven~ion is illustrated. In the arrangement of Fig. 7, the pin 40 has an enlarged portion 88 thereo having a diameter larger than the predatermined diameter of the pin 40. The enlarged portion 88 is located generally adjacent one end of the pin 40 thereof. The shoulder 68 is formed by the intersection of the enlarged portion ~8 and the surface of the first portion 62 of the pin 40. In the subject embodiment, the enlarged portion 88 of the pin 40, when assembled, is located in the annular recess 22 between the cross passage 20 and the first conical spring washer 4~. The cross passage 20 has a diameter smaller than the diameter of the first aligned opening 32 and the outer diameter of the enlarged portion 8 is smaller than the diameter of the first aligned opening 32.
In the subject arrangement of Fig. 7, the means 74 for supporting the first conical spring washer 42 during asse~bly is integrally ormed in the annular recess 22. An angled surface 90 is ~ormed in the bottom portion of the annular recess 22 adjacent - : :; . . .
W093/05245 PCT/USg2/~S~
209~4~ -lO-the bottom ~ur~ace 24 and at an angle o~ generally 45 degrees therewith. When considering the previous embodiment ~et forth in Figs. 3 6, it is recognized that instead of having the hollow support member 76 5 . located in the annular recess 22, the structure illustrated in Fig. 7 could be utilized in any one o~
the preceding embodimentsO Likewise, the hollow support member 76 of the previ~us embodiments could be utilized in Fig. 7 in place of the angled surface 90 without departing from the essence of the invention.
one aspect of the present invention provides - a tooth assembly 10 wherein the retaining meohanism 16 can be easily ins~alled with a lower force while a larger ~orce is necessary to disassemble the retaining mechanism. In all o~ ~he above-noted embodiments, there is a relationship between the diameter of the opening 53 of each o~ the first, second, and third conical spring washers 4~,44,46, and the outer diameter of the shoulder ~ that is forced through the opening 53. Generally, the outer diameter o~ the shoulder 68 in each of the above-noted embodiments is two to five percent greater than the diameter of the opening 53 of the respective first, second, and third conical spring washers 42,44,46. Preferably, the outer diameter of the respective shoulders 68 is three - to four percent greater than the diameter of the opening 53.
Even though the cro-qs passage 20 and the aligned openings 32,34 have been indicated as having diameters! it is recognized that their shapes could be varied without departing from the essence of the invention.
.: ` .
. .
W093/05245 Pcr/~ss2~os2~l i ` -11- 209~4~
Industrial Appl icab~l~ity In order to assemble the tooth assembly 10 as illustrated in ~igs. 1-6, the hollow support me~ber 76 is placed in the annu}ar recess 22 with the first ~urface 80 thereof being placed in abutment with the bottom surface 24 o~ the annular recess 20. The first, second, and third conical spring washers 42,44,46 are then placed in the annular recess adjacent the hollow suppsrt member 76. Each of the first, second, and third oonical spring washers 42,44,46 are placed adjacsnt each other with the convex side of each facing towards the hollow support member 76. The socket 30 of the ground engaging tool 14 is slipped over the nose portion 18 until the first and second aligned openings 32,34 ar2 in align~ent with the cross passage 20 and the annular recess 22.
The second portion 70 of the pin 40 is inserted into the first aligned passage 32 through the first, second, and third conical spring washers 42,44,46 and into the cross passage 20 until the larger first portion 62 o~ the pin 40 contacts the concave side 48 of the third conical spring washer 46. An external force is applied to the exposed end of the first portion 62 of the pin 40 forcing each of the first, second, and third conical spring washers 42,44,46 to flex. Since the outer peripheral edge 54 of the first conical spring washer 42 is in contact with the angled second surface 82 of the hollow support member 76 and the external force is being transmitted to the concave side 48 of the third conical washer 46, the ~irst, second, and third conical spring washer~ 42,44,46 are forced to fl~x. The flexing of the respective firs~, second, and third conical spring washers 42,44,46 results i~ a shape that is more convex.
Simultaneously with the flexing of the first, second, W093/05~ PCT/~
2091~ 12-and third conical spring washers 42,44,46, the diameter of the respective openings 53 thereof is enlarged allowing the inner surface 52 to slip over the respective shoulders 68 of the plurality of ridges ~6. The exter~al force is continuou~ly applied to the pin 40 until the inner surface 52 of each of the first, second, and third.conical spring washers 42,44,46 is located in abutment with the respective angled ridges 66 of the groove 64. At this point, the pin 40 is fully assembled and the second portion 70 has extended into the second aligned opening 34. Once the external force is withdrawn, the first, second, and third conical spring washers 42,44,46 attempt to return to their oriqinal shape. In the subject embodiment, best illustrated in Fig. 3, the inner surface 52 of each of the first, second, and third conical spring washers 42,44,46 are tightly pressed against the respective ridges 66 thereof. However, it should be recognized that the diameter of the angled ridges 66 could be such that the first, second, and third conical spring washers 42,44,46 could return to their original shape an~ not be tightly pressed against the ridges 66 without departing from the essence of the invention.
Since the first portion 62 of the pin 40 has a diameter greater than the diameter of the cross pascage 20, the first portion 70 of the pin 40 cannot be ~orced through the tooth assembly 10 in a direction fro~ the first aligned passage 32 towards the second aligned passage 34. Consequently, the only way that the pin 40 can be removed fro~ the tooth assembly 10 is in the direction from the second aligned opening 34 towards the ~irst aligned opening 32.
In the event, the pin 40 attempts to move in a direction from the second aligned opening 34 towards . .
, W0~3/0~ PCT/US92tO5~1 -13- ~ , 2 ~ 91~ 4 ~
the first aligned opening 32, the third conical spring washer ~6 contacts the inside wall of the socket 30 of the ground engaging tool 14. Further attempts of movement in this direction results in the first, second, and ~hird coni~al sprins washers 42,44,46 being forced to change toward~ a shape that is glat.
As the ~irst, æecond, and third conical spring washers 42,44,46 are being ~lattened, the diameter o~ the inner surfac~ 52 attempts to become smaller. As the ~o diameter o~ the inner surface 52 is attempting to become smaller, a gxeater compressive force is applied to the respective angled ridges 6~ thus further inhibiting the inner surface 52 from slipping over the respective shoulders 68. The subjeot arrangement can :
withstand a very high force without inadvertently becoming disassembled.
In order to remove the pin 40 from its assembled position, a force is applied to the end of the second portion 70 of the pin 40 adjaaent the second aligned opening 34 to move the pin 40 in a direction from the second aligned opening 34 towards the fixst aligned openiny 32. This external force must be su~ficiently high to force the diameter of the openings 53 to expand in order for the inner surfaces 52 to slip over the shoulders 68 thereof. Once the first, second, and ~hird conical spring washexs have been forced to slip over the respective shoulders 68 , and are i~ a position that the inner surface 52 is located around the second portion 70 of the pin 40, the pin ~0 can easily be moved the remainder of the distance for disassembly.
Re~erring to the embodime~t set ~Qrth in Fig. 4, th~ assembly o~ the hollow support member 76 and the first, second, and third conical spring washers ~2,44,46 into the annular recess 2i and the ,-..... : . : . . . . .
.
~ . :
Wo~3/os~s P~T~US~O.~
2 ~ 5 -14-subsequent mounting of the ground engaging tool 14 onto the nose portion 13 is the same as ~hat ~et forth above with respect to Figs. 1-3. The second portion 70 of the pin 40 o~ the subject embodiment is inserted into the first aligned opening 32 through the ~irst, second, and third conical spring`washers 42,4~,46 and into the cross passage 20 until the larger first portion 62 thereof contacts the third conical spring washer 46 adjacent the inner ~urface 52 thereof. At this point, an external force is applied to ~he end of the first portion 62 of the pin 40 forcing it in a direction towards the second aligned opening 34. As the pin 40 is being forced in a direction towards the second aligned opening 34, the diameter of ~he inner surface 52 is being ~orced to expand to a larger diameter in order to slip over the predetermined dia~eter o~ the pin 40. In the subject embodiment, the predetermined diameter of the pin 40 is the outer diameter of the shoulder 68. The pin 40 is continually forced in the direction towards the second aligned opening 34 until the inner surface 52 of each of the first, second~ and third conical spring washers 42,44,46 is located in the ~roove 64. As set forth ~bove, with respect to Figs. 1-3, the first, second, and third conical spring washers 42,44,46 are caused to flex as a result of the outer peripheral edge 54 of the first conical spring washer 42 being in contact with the angled second surface ~2 of the hollow support member 76. This flexing of the first, second, and third conical spring washers 42,44,46 aid in the diameter of the openings 53 thereo~ expanding to a larger size. Once the inner surfaces 52 cf the first, second, and third conical spring washers 42,44,46 are located in the groove 64, they return to their initial shape. In the subject embodiment, the diameter of the .
,, , ~, :
.
. .
~WOg3/0~245 PCT/~S~2/~5.~.8 , ~15- 2 ~ 914 4 ~ !
openings 53 are larger than the diameter of the ~roove 64, thus the Pirst, second, and third conical spring washers 42,44,46 are not under any type of load.
Since the diameter of the first portion 62 a~ the pin 40 is greater than the diameter of the cross passage 20 of the nose portion 18, the pin 40 cannot be r~moved in a direction extending from the first aligned opening 32 towards the second aligned opening 34. Any attempts o~ the pin 40 inadvertently becoming disass~mbled in the opposite dirertion is resist2d when the concave side 48 of the third conical spring washer 46 contacts the inside surface of the socket 30 of the ground engaging tool 14. Since the first, se~ond, and third conical spring washers 42,44,46 are progressively flattened during any further movement towards disassembly of the pin 40 and the diameter of the inner surface 52 be~omes s~aller as a result thereof, the subject arrangement can withstand high forces resisting any attempt o~ inadvertent disassembly.
In order to remove the pin 40 from the disassembled position, an external force is applied to .
the end of the -~econd portion 70 of the pin 40 located adjacent the second aligned opening 34 moving the pin 40 in a direction from the second aligned opening 34 towards the first aligned opening 32. The force must be sufficiently high in order to force the diameter o~
the openings 53 o~ the respective first, second, and third conical spring washers 42,44,~6 to expand so that the respective inner surfaces 52 can slip over the shoulder 68. once the pin 40 has been moved in a dirPc~ion gar enough for the first, second, and third conical spring washers 42,44,46 to be located around the second portion 70 o~ the pin 40, the pin 40 may be easily removed thereafter.
:
.. ~ ,. . : .
W093/05~ PCTJUS~
2~ 16-Referring to the embodiment of Fig. 5, the aæsembly of ~he hollow support member 76, the f irst, second, and third conical spring washers 42,44,46, and the ground engaging tool 14 are the same as set forth in the previous embodiments. In this arrangement, the first portion 62 and the second portion 70 of the pin ~0 have the same diameter which is the same as the predet~rmined diameter of the pin 40. In the subject embodim~nt, the second portion 70 o~ the pin 40 is inserted into the first aligned opening 32 until the end of the second portion 70 of the pin 40 contacts the third conical spring washer 4~ adjacent the inner surface 52 thereof. An external force is applied to the end of the first portion 62 forcing the first, second, and third conical spring washers 42,44,46 to flex in the same manner as set forth in the previous embodiments until the diameter of the respective openings 53 thereof are increased to a size sufficient for the predetermined diameter o~ the pin 40 to slip therethrough. The external force is continu~lly applied forcing the pin 40 in a direction towards the second aligned opening 34 until the inner surfaces 52 of the first, second, and third conical spring washers 42,44,46 are located in the groove 64 thereof. As noted with respect to Fig. 4, the diameter of the openings 53 of the first, second, and third conical spring washers 42,44,4~ is larger than the diameter of the groove 64. Consequently, once assembled, the first, second, and third conical spring washers 42,44,46 are in their relaxed condition.
As set forth above, any move~ent of the pin ~0 in a direction f~om the second aligned opening 34 towards the first aligned opening 32 is xesis ed by the contact of the third conical spring washer 46 against the inside wall of the socket 30 of the ground , .. .
, ~
, .
W0~3/05~5 P~T/US92/05~1 -17- ' ~09t~
engaging tool 14. However, in the ~ubject embodiment, since the dia~eters of the first portion 62 and the second portion 70 are the same, the pin 40 can move in :
a direction ~rom the ~irst aligned opening 32 towards the second aligned openin~ 34. ~on~equently, a force equal to the assembly force can be applied to remove the pin 40 in a direction towards the.second alig~ed opening 34. Once the pin 40 is fully removed from the f irst, second, and third conical spring washers 42,44,46, the pin may be easily pulled from the assembly. Conversely, any attempts to remove the pin 40 from the same side that it was installed results in the force being resisted in the same manner as noted with respect to the embodiment of Fig. 4. Even though the removal force could be the same as the assembly ~orce, the assembly force is sufficiently high so that this arrangement could be satisfactorily used in many applications where extremely large external ~orces trying to remove the pin 40 are absent.
. Referring now to Fig. 6, the assembly of the hollow support 76, the first, second, and third conical spring washers 42,44,46 and the ground engaging tool 14 are the same as same as set for~h in the previous embodiments. In the subject embodiment, the second portion 70 of the pin 40 is inserted through the first aligned opening 32, the ~irst, seGond, and third conical spring washers ~2,44,46 and into the cross passage 20 until the larger first portion 62 thereof contacts the third conical spring washer ~6 adjacent the inner surface 52 thereof. The diameter of the openings 53 of the first, second, and third conical spring washers 42,44,46 are forced to expand in the same manner as set forth in the previous e~bodiments. The external force is continually applied until the inner surfaces 52 of the first, . .~, . . . , - ~
; ' . ' ' ' ,: . . .
. :.. ; ~' ' , ' ' , ' ' ,, . . . , . . . ~............... ~
W(:) 93/05~45 PCr/US92/~S281 2~91 445 second, and third spring washers 42,44,46 are located in th~ groo~e 64. Once the inner surfac~s 52 ar~
located in the groove 64, the conical spring washers 42,44,46 return to their fully relaxed condition as previously ~et forth in the above noted e~bodiments.
Since the diameter o~ the first portion 62 of the pin 40 is greater than the diameter of the cross passage 20, the pin 40 cannot be disassembled in a direction ~rom the first alignPd opening 32 towards the second alig~ed opening 34.
As previously noted with respect to previous embodiments, inadvertent attempts of the pin 40 to come out during use is strongly resisted. In order to remove the pin 40 from its assembled position, a force is applied to the end of the second portion 70 of the pin 40 forcing the diameter o~ the respective openings 53 of the f irst, second, and third conical spring washers 42,44,46 to expand until the respective inner surfaces 52 slip over the shoulder 68. Once the pin 40 has been moved to a position that the first, second, and third conical spring washers 42,44,46 are disposed around the second portion 70, the pin 40 can be easily removed~
Referring now to the embodiment set forth in Fig. 7, the assembly o~ the components is quite similar to that set forth in the previous embodiments.
However, in the subject arrangement, there i~ no hollow support member 76 to insert into the annular recess 22 since the structure o~ the nose portion 18 has an angled surface 90 integrally ~ormed therein.
The first, second, and third conical spring washers 42,44,~6 are inserted in the annular recess 22, in the sa~e manner previously set forth, followed by placement of the ground engaging tool 14 over the nose portion l~. ~he pin 40 is inserted into the first ..... . . . .:, . . ................................. .
~ ., .
- . . ' . ' ~ : ':
, . . . :, ::, .. . . .. .
_ W093~5 4 ~ PCT/US9 aligned opening 32 through the first, second, and third conical spring washers 42~44,46 and into the cross passage 20 until the enlarged portion 88 of the pin 40 contacts the concave surface 48 of the third conical spring washer 46 adjacent the inner surface 52 thereof. An external ~orce is applied to the end of the pin 40 forci~g it i~ a direction towards the second aligned opening 34. The first, second, and third conical spring washers 42,44,46 are forced to ~lex in the same manner as set forth in the pr~vious embodiments. The only difference being that the outer peripheral edge 54 o~ the first conical spring washer 42 is in contact with the angled surface 90 as opposed to the angled surfac~ 82 of the hollow support me~ber 76. Once the shoulder 68 formed by the intérsection o~ the enlarged portion 88 and the predetermined diameter of the pin 40 passes through the openings 53 o~ the first, second, and third conical spring washers 42,44,46, each of the ~irst, second, and third conical spring washers 42,44,46 return to their relaxed condition. æince the enlarged portion 88 of the pin 40 has a diameter greater than the diameter of the ~ .
cross passage ~0, the pin 40 cannot be removed in a direction towards the second aligned opening 34. Any attemptsj during use, of the pin 40 trying to inadvertently come out in a direction from the second aligned opening 34 towards the first aligned opening 32 is resisted once the concave surface 48 of the third conical spring washer 46 contacts the inner surface of the socket 30 of the ground engaging tool 14. Further movement of the pin 40 in the direction of the first aligned opening 32, as set forth in previous embodiments, causes the ~irst, second, and third conical spring washers 42,44,46 to flatten, thus .
., -, . ~ .
' ~ ' . ., , - ' . . ', " . ,.~, , ' . ,, ', . , ,. , ,.
W093/05245 2 ~ 9 ~ P~T/~J~ 0 resulting i~ the diameter of the inner sur~ace 32 becoming smaller.
In order to disassemble the pin 40 from its assembled position, a force is applied to the pin 40 at a location adjacent the second aligned opening 34 forcing the pin 40 in a direction towards the first aligned opening 32. The high f~rce is applied in order to ~orce the diameter of the openings 53 of the firsty second, and third conical spring washers 42,44,46, to ~xpand to a size sufficient for the respective inner surfaces 52 to slip over the outer diameter o~ the shoulder 68. Once the enlarged portion 88 passes through the respective first, second, and third conical spring washers 42,44,46, the pin 40 can be easily removed.
In the embodiments set ~orth above, the respective pins 40 are made from an SAE 4140 material heat treated to a hardness o~ Rockwell "C" 40-44.
Thîs material has a yield strength in the range of 1,120 to 1,290 MPa (162,000-187,000 psi), and a modulus o~ elasticity.o~ 200,000 MPa (29,000,000 psi).
~he first, second, and third conical spring washers 42,44,46 are made from a spring steel material having a carbon content in the range of .55-1.05 and is heat treated to a hardness of Rockwell "C" 48-52. This material has a yield strength in the range of 1,470 MPa - 1,690 MPa (213,000-246,000 psi) and a modulus of elasticity approximately the same as the material o~ the pin 40.
The following set forth one example o~ the ~orce~ needed to assemble and~ disassemble at least one arrangement o~ the embodiments set forth above. The test of the example was conducted on the arrangement illustrated ln Fig. 7. The outex diameter of the enlarged portion 88 which is the same as the outer - . .
:
.
W093/05~45 ' PCT/V~92/05281 -21- 2 ~91 ~ ~a diam~ter of the shoulder 6~ is 35 millimeters ~l.377 inches) and the diameter of the openings 53 defined by the inner surfaces 52 of the first, second, and third conical spring washers 42,44,46 is 33.83 millimeters (1.332 inches). In the subject test, a force o~ approximately 40.72 kN (9,150 pounds~ was used to assemble the pin 40. A force of approximately 105.02 kN (23,600 pounds) was used to disassemble the pin 40. It is recognized that the forces necessary to assemble and disassemble the components will vary as the siæes of the pin 40 and the conical washers 42,44,46 varies. Naturally, tooth assemblies lo that are small may require a smaller pin 40 and smaller conical spring washers 42,44,46, and tooth as~emblies that are larger may likewise require a larger pin 40 and larger conical spring washers 42,44,46.
Furthermore, a greater number or lesser number of conical spring washers may be used depending on design criteria.
In view of the ~oregoing, it is readily apparent that the structure o~ the present invention provides a retaining mechanism 16 ~hat can insure that, during use~ the pin 40 is readily secured in its assembled position. Furthermore, the components can be assembled and disassembled without having to shear or ~racture any of the components. It is recognized that in some instances the conical spring washers 42,44,46 may crack or fracture during disassembly thereof.
Other aspec~s, objects, and advantages of this invention can be obtained from a study of the drawings, the disclosure, and the appended claims.
Claims (26)
1. A retaining mechanism (16) adapted for use in securing a ground engaging tool (14) to a work implement (12), the ground engaging tool (14) having a rearward and portion (28) defining a socket (30) and first and second aligned openings (32,34) defined in the rearward end portion (28) and located on opposite sides of the socket (30), the work implement (12) having a nose portion (18) adapted to mate with the socket (30) and defining a cross passage (20) that registers, when assembled, with the first and second aligned openings (32,34) and an annular recess (22) having a bottom surface (24) and being defined in the nose portion (18) or in the rearward end portion (28) concentric with the cross passage (20) or the first and second aligned openings (32/34), the retaining mechanism (16), comprising:
a conical spring washer (42) having a concave side (48) a convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and being located, when assembled, in the annular recess (22); and a pin (40) having a predetermined diameter and including means (60) for forming a shoulder thereon, the pin (40) being located, when assembled, in the first and second aligned openings (32,34), the cross passage (20), and the opening (53) of the conical spring washer (42) with the shoulder means (60) being located adjacent the convex side (50) of the conical spring washer (42).
a conical spring washer (42) having a concave side (48) a convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and being located, when assembled, in the annular recess (22); and a pin (40) having a predetermined diameter and including means (60) for forming a shoulder thereon, the pin (40) being located, when assembled, in the first and second aligned openings (32,34), the cross passage (20), and the opening (53) of the conical spring washer (42) with the shoulder means (60) being located adjacent the convex side (50) of the conical spring washer (42).
2. The retaining mechanism (16) of claim 1 wherein the means (60) for forming a shoulder on the pin (40) has a diameter larger than the diameter of the opening (53) of the conical spring washer (42).
3. The retaining mechanism (16) of claim 2 wherein the shoulder means (60) includes a shoulder (68) having an outer diameter and the outer diameter of the shoulder (68) is in the range of approximately 2 to 5 percent greater than the predetermined diameter of the opening (53) of the conical spring washer (42).
4. The retaining mechanism (16) of claim 3 wherein the outer diameter of the shoulder (68) is more specifically in the range of 3 to 4 percent greater than the predetermined diameter of the opening (53) of the conical spring washer (42).
5. The retaining mechanism (16) of claim 4 wherein the conical spring washer (42) has an outer peripheral edge (54) on the convex side (50) thereof and the retaining mechanism (16) includes means (74) for supporting the outer peripheral edge (54) of the conical spring washer (42), during assembly, the supporting means (74) is located in the annular recess (22).
6. The retaining mechanism (16) of claim 5 including a second conical spring washer (44) having a concave side (48), a convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and being located, when assembled, in the annular recess (22) with the convex side (50) thereof adjacent the concave side (48) of the first conical spring washer (42).
7. The retaining mechanism (16) of claim 6 including a third conical spring washer (46) having a concave side (48), a convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and being located, when assembled, in the annular recess (22) with the convex side (50) thereof adjacent the concave side (48) of the second conical spring washer (44).
8. The retaining mechanism (16) of claim 7 wherein each of the conical spring washers (42,44,46) are substantially identical in size and shape.
9. The retaining mechanism (16) of claim 8 wherein the means (60) for forming a shoulder includes a groove (64) defined in the pin (40) around the circumference thereof generally adjacent one end thereof, the diameter defined by the groove (64) being smaller than the predetermined diameter of the opening (53) of the first, second, and third conical spring washers (42,44,46), and the predetermined diameter of the pin (40) being greater than the predetermined diameter of the respective opening (53) of the first, second, and third conical spring washers (42,44,46).
10. The retaining mechanism (16) of claim 9 wherein the shoulder (68) is defined by one side of the groove (64) in the pin (40).
11. The retaining mechanism (16) of claim 10 wherein a first portion (62) of the pin (40) has a diameter the same size as the predetermined diameter, and a second portion (70) of the pin (40) has a smaller diameter and the second portion (62) being adapted, when assembled, to be located in the cross passage (20) of the nose portion (18) and the second opening (34) of the aligned openings, and the first portion (62) of the pin (40), when assembled, is located in the first opening (32) of the aligned openings and the annular recess (22) of the nose portion (18).
12. The retaining mechanism (16) of claim 11 wherein, when assembled, the convex side (50) of each conical spring washer (42,44,46) is facing towards the second portion (70) of the pin (40).
13. The retaining mechanism (16) of claim 12 wherein the pin (40) has a longitudinal axis (58) and the groove (64) defined in the pin (40) defines a plurality of individual adjacent ridges (66) one for each of the first, second, and third conical spring washers (42,44,46), each ridge (66) is angled with respect to the longitudinal axis (58) of the pin and each ridge (66) defines a shoulder (68).
14. The retaining mechanism (16) of claim 13 wherein a bottom surface (24) is defined by the annular recess (22), the support means (74) includes a hollow support member (76) having a longitudinal axis (78), a first surface (80) perpendicular to the longitudinal axis (78) and operative, when assembled, to abut the bottom surface (24) of the annular recess (22), and a second surface (82) angled with respect to the longitudinal axis (78) of the hollow support member (76) and operative, during assembly, to contact the outer peripheral edge (54) of the first conical spring washers (42).
15. The retaining mechanism (16) of claim 14 wherein the second surface (82) has an angle of generally 45 degrees with respect to the longitudinal axis (78) of the support member (76).
16. The retaining mechanism (16) of claim 12 wherein the second portion of the pin (70) has a longitudinal axis (86) offset with respect to the longitudinal axis (58) of the first portion (62) of the pin (40).
17. The retaining mechanism (16) of claim 16 wherein the offset of the first and second portions (62,70) of the pin (40) results in the outer surface of each being in axial alignment at one point on their respective circumferences.
18. The retaining mechanism (16) of claim 8 wherein the shoulder (68) of the means (60) for forming a shoulder is formed by the intersection of an enlarged portion (88) and the portion of the pin (40) having the predetermined diameter, and the enlarged portion (88) of the pin (40) is located, when assembled, in the annular recess (22) between the cross passage (20) and the first conical spring washer (42).
19. The retaining mechanism (16) of claim 18 wherein the diameter of the enlarged portion (88) of the pin (40) is larger than the diameter of the cross passage (20).
20. The retaining mechanism (16) of claim 19 wherein, when assembled, the convex side (50) of each conical spring washer (42,44,46) is facing towards the enlarged portion (88) of the pin (40).
21. The retaining mechanism (16) of claim 20 wherein the support means (74) includes an angled surface (82) formed in the annular recess (22) of the nose portion (18) adjacent the bottom surface (24) thereof operative, during assembly, to contact the outer peripheral edge (54) of the first conical spring washer (42).
22. A tooth assembly (10) comprising:
a ground engaging tool (14) having a rearward end portion (28) defining a socket (30) and first and second aligned openings (32,34) defined therein and located on opposite sides of the socket (30);
a work implement (12) having a nose portion (18) operative to mate with the socket (30) of the ground engaging tool (14), a cross passage (20) defined in the nose portion (18) that is generally in axial alignment with the first and second aligned openings (32,34), and an annular recess (22) defined in one side of the nose portion (18) concentric with the cross passage (20), and a retaining mechanism (16) including a conical spring washer (42) having a concave side (48), a convex side (50), an outer peripheral edge (54) on the convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and a pin (40) having a predetermined diameter and including means (60) for forming a shoulder thereon, the conical spring washer (42) is located in the annular recess (22) and the pin (40) is disposed in the first and second aligned openings (32,34), the cross passage (20), and the conical spring washer (42) with the shoulder means (60) being located adjacent the convex side (50) of the conical spring washer (42).
a ground engaging tool (14) having a rearward end portion (28) defining a socket (30) and first and second aligned openings (32,34) defined therein and located on opposite sides of the socket (30);
a work implement (12) having a nose portion (18) operative to mate with the socket (30) of the ground engaging tool (14), a cross passage (20) defined in the nose portion (18) that is generally in axial alignment with the first and second aligned openings (32,34), and an annular recess (22) defined in one side of the nose portion (18) concentric with the cross passage (20), and a retaining mechanism (16) including a conical spring washer (42) having a concave side (48), a convex side (50), an outer peripheral edge (54) on the convex side (50), and an inner surface (52) defining an opening (53) of a predetermined diameter, and a pin (40) having a predetermined diameter and including means (60) for forming a shoulder thereon, the conical spring washer (42) is located in the annular recess (22) and the pin (40) is disposed in the first and second aligned openings (32,34), the cross passage (20), and the conical spring washer (42) with the shoulder means (60) being located adjacent the convex side (50) of the conical spring washer (42).
23. The tooth assembly (10) of claim 22 including means (74) for supporting, during assembly, the outer peripheral edge (54) of the conical spring washer (42), the support means (74) being located in the annular recess (22).
24. The tooth assembly (10) of claim 23 wherein a bottom surface (24) is defined in the nose portion (18) at bottom of the annular recess (22), the support means (74) includes a hollow support member (76) having a longitudinal axis (78), a first surface (80) perpendicular to the longitudinal axis (78) thereof and being in abutment with the bottom surface (24) of the annular recess (22) and a second surface (82) angled with respect to the longitudinal axis (78) thereof and operative, during assembly, to contact the outer peripheral edge (54) of the conical spring washer (42).
25. The tooth assembly (10) of claim 23 wherein the support means (74) is integrally formed in the annular recess (22) and has a surface (90), adjacent the bottom surface thereof, angled with respect to the longitudinal axis of the cross passage (20).
26. The tooth assembly (10) of claim 25 wherein the angled surface (90) has an angle of generally 45 degrees with respect to the longitudinal axis of the cross passage (20).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75898791A | 1991-09-10 | 1991-09-10 | |
| US7/758,987 | 1991-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2091445A1 true CA2091445A1 (en) | 1993-03-11 |
Family
ID=25053940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002091445A Abandoned CA2091445A1 (en) | 1991-09-10 | 1992-06-22 | Retaining mechanism for a tooth assembly |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU648008B2 (en) |
| CA (1) | CA2091445A1 (en) |
| DE (1) | DE4292960T1 (en) |
| GB (1) | GB2264133B (en) |
| WO (1) | WO1993005245A1 (en) |
| ZA (1) | ZA925010B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005108684A1 (en) * | 2004-05-10 | 2005-11-17 | Qsf Acquisitions Inc. | Locking assembly for ground engaging tools |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA946878B (en) * | 1993-09-08 | 1995-04-24 | Keech Castings Australia | Hydraulic fastening device and method |
| UA108940C2 (en) | 2011-07-05 | 2015-06-25 | A holding device, a holding system between the gripping component and the covered component, the gripping component and the gripping and storing component |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3796464A (en) * | 1972-09-27 | 1974-03-12 | Carmet Co | Resilient connection for mining pick and bushing |
| US4096653A (en) * | 1974-10-31 | 1978-06-27 | Caterpillar Tractor Co. | Cartridge retaining means for earthworking tips |
| US4055223A (en) * | 1975-03-31 | 1977-10-25 | Caterpillar Tractor Co. | Corner tooth assembly for an earthmoving implement having a hollow rearward portion |
| US4611418A (en) * | 1985-03-28 | 1986-09-16 | Launder Richard L | Locking mechanism for earth excavation teeth |
| US4881331A (en) * | 1985-04-03 | 1989-11-21 | Gamma Lock (Proprietary) Limited | Teeth for use with earth moving equipment |
| US4716668A (en) * | 1985-10-24 | 1988-01-05 | Esco Corporation | Excavating tooth point for use with basket spring retainer |
| US4843013A (en) * | 1986-04-09 | 1989-06-27 | Bionostics, Incorporated | Multiple control standard for blood analysis |
| US4848013A (en) * | 1988-10-24 | 1989-07-18 | Caterpillar Inc. | Two pin fastening assembly with interconnecting and retaining means |
| US4918843A (en) * | 1989-02-21 | 1990-04-24 | Caterpillar Inc. | Ground engaging tool |
| CA2018309C (en) * | 1989-06-06 | 2001-05-08 | Howard W. Robinson | Bladesaver assembly |
-
1992
- 1992-06-22 GB GB9304922A patent/GB2264133B/en not_active Expired - Fee Related
- 1992-06-22 DE DE4292960T patent/DE4292960T1/en not_active Withdrawn
- 1992-06-22 AU AU22687/92A patent/AU648008B2/en not_active Ceased
- 1992-06-22 CA CA002091445A patent/CA2091445A1/en not_active Abandoned
- 1992-06-22 WO PCT/US1992/005281 patent/WO1993005245A1/en active Application Filing
- 1992-07-06 ZA ZA925010A patent/ZA925010B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005108684A1 (en) * | 2004-05-10 | 2005-11-17 | Qsf Acquisitions Inc. | Locking assembly for ground engaging tools |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4292960T1 (en) | 1993-10-07 |
| GB9304922D0 (en) | 1993-06-02 |
| ZA925010B (en) | 1993-08-03 |
| GB2264133B (en) | 1995-03-29 |
| GB2264133A (en) | 1993-08-18 |
| WO1993005245A1 (en) | 1993-03-18 |
| AU648008B2 (en) | 1994-03-31 |
| AU2268792A (en) | 1993-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5205057A (en) | Retaining mechanism for a tooth assembly | |
| AU620074B2 (en) | Two pin fastening assembly | |
| US5785357A (en) | Locking joint | |
| EP0925455B1 (en) | Mounting device | |
| EP1366840B1 (en) | Tool for chip-removing machining | |
| EP0373239B1 (en) | Tolerance ring and shim | |
| EP1818125B1 (en) | Tool for chip cutting machining | |
| CA1290779C (en) | Pipe coupling | |
| DE60109219T2 (en) | DEVICE FOR INTERNAL BODY ADJUSTMENT FOR DUOSER MOTORMOTH BRAKES | |
| DE19919696A1 (en) | Shaft coupling has two hubs with two end surfaces and two groups o f claws, cavities between claws, and divided flexible belt and protuberances | |
| DE102008041699A1 (en) | Hybrid retaining sleeve for a tool inserted in a block | |
| DE202008007632U1 (en) | Fastening element for fastening to a bolt | |
| CA2091445A1 (en) | Retaining mechanism for a tooth assembly | |
| US4433814A (en) | Core-engager retainer for an expansible shaft | |
| US5217093A (en) | Disc brakes | |
| US6202265B1 (en) | Tool-less fastener for computer connections | |
| US3437003A (en) | Retaining pin with scissors-like joint | |
| EP0343191B1 (en) | Positive keeper means for pins of earthworking tips | |
| US6591056B1 (en) | Connector terminus springs | |
| GB2136078A (en) | Axial Securing Element | |
| CN115875404A (en) | Connecting link and chain | |
| KR100988521B1 (en) | Composite roll with divided ring fixed by key | |
| KR0147357B1 (en) | Wedged overlapping hook tire joint | |
| DE102015005776B4 (en) | Device for the play-free clamping of a component, in particular a tool, and component for use in the device | |
| DE2938272C2 (en) | Device for frictionally locking a hub on a shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |