CA1198691A - Jib assembly - Google Patents
Jib assemblyInfo
- Publication number
- CA1198691A CA1198691A CA000419913A CA419913A CA1198691A CA 1198691 A CA1198691 A CA 1198691A CA 000419913 A CA000419913 A CA 000419913A CA 419913 A CA419913 A CA 419913A CA 1198691 A CA1198691 A CA 1198691A
- Authority
- CA
- Canada
- Prior art keywords
- jib
- worm gear
- assembly
- sleeve
- boom
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/044—Working platforms suspended from booms
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
ABSTRACT
An improved jib assembly for use with an articulated boom carried by a work truck and which boom carries at least one work-person carrier on a freely rotatable shaft extending through the boom, the jib assembly comprising a jib, a speed reducer, comprising a worm gear and a worm for rotating the worm gear, the worm gear concentric with the shaft carrying the at least one carrier, the worm gear freely rotatable relative to the shaft, a motor for driving the worm gear, a connector for connecting the jib to the worm gear to rotate the jib with the worm gear as the worm gear is rotated by the worm to provide continuous 360 degree rotation to the jib.
An improved jib assembly for use with an articulated boom carried by a work truck and which boom carries at least one work-person carrier on a freely rotatable shaft extending through the boom, the jib assembly comprising a jib, a speed reducer, comprising a worm gear and a worm for rotating the worm gear, the worm gear concentric with the shaft carrying the at least one carrier, the worm gear freely rotatable relative to the shaft, a motor for driving the worm gear, a connector for connecting the jib to the worm gear to rotate the jib with the worm gear as the worm gear is rotated by the worm to provide continuous 360 degree rotation to the jib.
Description
1 FIELD OF INVENTIaN
This invention relates to an improved jib assembly for use with an articulated boom.
BACKGROUND OF THE INVENTION
Articulated booms are well known in the art. They are usually mounted on a truck and in operation, move a workperson carried for example in a bucket c~rrier secured to one end of the boom to an elevated work position.
As the boom is extended,the bucket and the person carried in the bucket maintains a vertical attitude. This is accomplished by the bucket carrier lG being suspended on a shaft freely rotatable in a sleeve carried in the end of the boom and to which the bucket carrier is secured so that irrespective of the angle of the boom the bucket is oriented vertically.
To assist the workperson in for example the bucket carrier, a work jib is carried in a sleeve proximate the end of the boom to pivot from a horizontal, to a vertical position and to slide in the sleeve to assist the workperson completing the job. The jib is slidable in the sleeve from position to position where it is locked by a pin passing through aligned apertures in both the jib and the sleeve. A metal quadrent carried by the boom pivotally secures the sleeve thereto for locking by a pin carried by the sleeve in one of a plurality of apertures in ihe quadrent. While the addition of the jib was intended to reduce the work load of the operator, hand adjustment and rotation of the jib to carry out various work functions was difficult to say the least. In fact, in most instances manipulation of the ji~ to move the heavy wires on a hydro line was impractical.
Z5 In my co-pendin~Canadian Patent Application 373,~58 and in co-pending United States Application entitled Articulated ~oom and Assembly Therefor, I disclosed an articulated boom and assembly comprising (a) a lower boom arm;
(b) an upper boom arm foldable over the lower arm, pivotal with respect to the lower boom arm;
~`
1 (c) hydraulic cylinders positioned between the boom arms and having piston rods extending therefrom, the hydraulic cylinders with the piston rods pivotally secured at one end to each boom arm intermediate the boom arm's ends, one hydraulic cylinder being pivotally secured to the underside of the upper arm and the other cylinder pivotally secured to the upperside of the lower arm facing the upperside when the upper arm is folded over the lower arm;
-and-(d) a linkage for pivotally connecting the upper arm, lower arm and hydraulic cylinders, the linkage comprising three points of connection, the points when linearly connected forming a triangle (preferably isoceles and equilateral triangles) and the points of connection are the apexes of the triangle with:
(i) one apex of the triangle (for example, in the case of the points of connection forming an isoceles triangle, the apex created by the meeting of the two equal sides), directed towards the hydraulic cylinders and piston rods between the upper and lower boom arms, and the linkage being pivotally connected at this point of connection to the free ends of the cylinders or piston rods not connected to the arms;
(ii) another apex of the triangle proximate the upper arm being pivotally secured to the end of the upper arm at this point of connection;
-and-Z5 (iii) another apex of the triangle proximate the lower arm being pivotally secured to the end of the lower arm at this point of connection.
While my development is a clear improvement over the structure of prior art art7culate booms, still the workperson in the bucke~ carrier requires the 3a assistance of some easily manipulatable device for the movement of for example 1 the hydro electric wires, which cannot be easily displaced or moved.
It is therefore an object of this invention, to provide a jib assembly for use with a boom of a work truck which overcomes the above deficiencies.
Further and other objects of this invention will be realized by those skilled in the art from the following summary of the invention and detailed description of an embodiment thereof.
SUMMARY OF THE INVENTION
According to one aspect of the invention, an improved jib assembly is provided for use with an articulated boom carried by a work truck and which boom carries at least one workperson carrier on a freely rotatable shaft extending through the boom, the jib assembly comprising a jib, a speed reducer comprising a worm gear and a worm for rotating the worm gear, the worm gear concentric with the shaft carrying the at least one workperson carrier, the worm gear freely rotatable relative to the shaft, a motor, preferably a hydraulic motor, for driving the worm gear, a connector for connecting the jib to the worm gear to rotate the jib with the worm gear as the worm gear is rotated by the worm to provide continuous 360 degree rotation to the jib.
Where the jib is carried in a sleeve (as is preferable), the jib is slideable in the sleeve and lockable therein and the sleeve is connected by the connector to the worm gear. In one embodiment, the connector comprises a plate rotatable with the worm gear. A locking pin assembly, preferably spring loaded, secured to the sleeve or jib, as the case may be, may be used to releaseably lock the jib or sleeve to the plate through an aperture in the plate.
In one embodiment the speed reduction provided by the speed reducer is in the order of 1:60. Therefore, with the speed reducer concentric with the shaft on which the carrier is mounted, a Full 360 degrees continuous rotatable adjustment of the jib is provided while at all times giving the jib substantial torque provided by the ~otor is inversely proportional to the speed of the 1 motor. Therefore,by reducing the output of the motor through the use of the speed reducer, the torque from the motor is increased giving the jib greater leverage for use to lift and/or move materials as for example, hydroelectric wires carried by adjacent hydro poles, during repair opera~ions.
S Theinvention will now be illustrated with reference to the following drawings of an embodiment thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a truck carrying a boom supporting a bucket carrier and jib assembly thereon according to one embodi~ent of the invention.
Figure 2 is a close up perspective view of part of the structure shown in Figure 1.
Figure 3 illus~rates the struc~ure shown in Figure 2 in another position.
Figure 4 is a schematic side view of the 360 rotational ability of the jib assembly according to the embodiment of the invention.
Figure 5 is a side view of a portion of the drive mechanism used ~or rotating the jib assembly according to the embodiment of the invention.
DETAILED DESCRIPTION OF THE DRAWINGS
With reference to figure 1, there is shown truck 10 comprising cab 12 and trailer 14 at the rear of truck 10. Articulated bocm 16 is supported on trailer 14 and comprises lower boom arm 18 upper boom arm 20 folded over lower arm 18 and pivotal at 22 with respect to lower boom arm 18.
With reference to Figures 1 to 4 a pair of bucket carriers only one of which is shown at 26 are mounted at the ends of shaft 28 extending through boom arm 20 proximate end 24. Assembly 30 is interposed between the ends of shaft 28 and each bucket carrier 26 for the change of the relative position of bucket carrier 26 with respect to the end of shaft 28 by thc rotation of annular ring 32. Plate 34 is secured to each end of shaft 28 and carrier two arms 36 and 38 extending away from shaft 28 a 1 secured to bucket carrier 26. Arms 36 and 38 carry axis 40 to which is secured gear 42. Ring 32 is secured to shaft 44 supported by arms 36 and 38, shaft 44 carries on its lower end gear ~6 meshed with gear 42. Therefore, as ring 32 is rotated, gear 46 is rotated about gear 42 rotating bucket carrier 26 relative to end 28.
Mounted concentrically with shaft 28 is speed reducer 50 (see Figures 3,4 and 5) manufactured by Amador Hydraulic Services Limited under model AHJ-500, and comprises worm gear 52 driven by worm 54 driven by hydraulic motor 56 for reducing the speed and thus the output of the motor by a ratio of 1:60. Hydraulic motor 56 is a Char-lynn Motor no. 101-1029. Speed reducer 50 and hydraulic motor 56 are secured to boom 20 by bolts or cap screws (see Figure 3). Cover plate 60 covers worm gear 52 and is adapted to rotate therewith. Plate 60 includes apertures 62 and 64 for receiving to bolts or cap screws 66 and 68 secured to arms 70 and 72 secured to metal sleeve 74 of the jib assembly. Sleeve 74 carries an aperture 75 therethrough which locking pin 76 extends. Sleeve 74 carries jib 78 having apertures 80 aligned with aperture 75. When jib 78 is mounted in sleeve 74, jib 78 is slidable in the sleeve 74 until locked by pin 76 passing through one of apertures 70 and aperture 75. As is apparent from Figure 4, worm gear 52 of speed reducer 50 is concentric with shaft 28 of bucket carrier 26 a full 360 continuous rotation.
Thus jib 78 is rotatable about shaft 28 a full 360 for maximum adjustability.
Worm gear 52 is freely rotatable relative to shaft 28. Because the torque provided by motor 56 is inversely proportional to the speed of motor 56, by reducing the speed of the motor through the use of the speed reducer to rotate the jib 78 and sleeve 74, jib 78 has a greater ability for lifting and moving, for example, overhead wires on telephone poles.
As many changes can be made to the embodiment of the invention without departing from the scope of the invention, it is intended that all matter con-tained herein be interpreted as illustra~ive of the invention and not in a limiting sense.
This invention relates to an improved jib assembly for use with an articulated boom.
BACKGROUND OF THE INVENTION
Articulated booms are well known in the art. They are usually mounted on a truck and in operation, move a workperson carried for example in a bucket c~rrier secured to one end of the boom to an elevated work position.
As the boom is extended,the bucket and the person carried in the bucket maintains a vertical attitude. This is accomplished by the bucket carrier lG being suspended on a shaft freely rotatable in a sleeve carried in the end of the boom and to which the bucket carrier is secured so that irrespective of the angle of the boom the bucket is oriented vertically.
To assist the workperson in for example the bucket carrier, a work jib is carried in a sleeve proximate the end of the boom to pivot from a horizontal, to a vertical position and to slide in the sleeve to assist the workperson completing the job. The jib is slidable in the sleeve from position to position where it is locked by a pin passing through aligned apertures in both the jib and the sleeve. A metal quadrent carried by the boom pivotally secures the sleeve thereto for locking by a pin carried by the sleeve in one of a plurality of apertures in ihe quadrent. While the addition of the jib was intended to reduce the work load of the operator, hand adjustment and rotation of the jib to carry out various work functions was difficult to say the least. In fact, in most instances manipulation of the ji~ to move the heavy wires on a hydro line was impractical.
Z5 In my co-pendin~Canadian Patent Application 373,~58 and in co-pending United States Application entitled Articulated ~oom and Assembly Therefor, I disclosed an articulated boom and assembly comprising (a) a lower boom arm;
(b) an upper boom arm foldable over the lower arm, pivotal with respect to the lower boom arm;
~`
1 (c) hydraulic cylinders positioned between the boom arms and having piston rods extending therefrom, the hydraulic cylinders with the piston rods pivotally secured at one end to each boom arm intermediate the boom arm's ends, one hydraulic cylinder being pivotally secured to the underside of the upper arm and the other cylinder pivotally secured to the upperside of the lower arm facing the upperside when the upper arm is folded over the lower arm;
-and-(d) a linkage for pivotally connecting the upper arm, lower arm and hydraulic cylinders, the linkage comprising three points of connection, the points when linearly connected forming a triangle (preferably isoceles and equilateral triangles) and the points of connection are the apexes of the triangle with:
(i) one apex of the triangle (for example, in the case of the points of connection forming an isoceles triangle, the apex created by the meeting of the two equal sides), directed towards the hydraulic cylinders and piston rods between the upper and lower boom arms, and the linkage being pivotally connected at this point of connection to the free ends of the cylinders or piston rods not connected to the arms;
(ii) another apex of the triangle proximate the upper arm being pivotally secured to the end of the upper arm at this point of connection;
-and-Z5 (iii) another apex of the triangle proximate the lower arm being pivotally secured to the end of the lower arm at this point of connection.
While my development is a clear improvement over the structure of prior art art7culate booms, still the workperson in the bucke~ carrier requires the 3a assistance of some easily manipulatable device for the movement of for example 1 the hydro electric wires, which cannot be easily displaced or moved.
It is therefore an object of this invention, to provide a jib assembly for use with a boom of a work truck which overcomes the above deficiencies.
Further and other objects of this invention will be realized by those skilled in the art from the following summary of the invention and detailed description of an embodiment thereof.
SUMMARY OF THE INVENTION
According to one aspect of the invention, an improved jib assembly is provided for use with an articulated boom carried by a work truck and which boom carries at least one workperson carrier on a freely rotatable shaft extending through the boom, the jib assembly comprising a jib, a speed reducer comprising a worm gear and a worm for rotating the worm gear, the worm gear concentric with the shaft carrying the at least one workperson carrier, the worm gear freely rotatable relative to the shaft, a motor, preferably a hydraulic motor, for driving the worm gear, a connector for connecting the jib to the worm gear to rotate the jib with the worm gear as the worm gear is rotated by the worm to provide continuous 360 degree rotation to the jib.
Where the jib is carried in a sleeve (as is preferable), the jib is slideable in the sleeve and lockable therein and the sleeve is connected by the connector to the worm gear. In one embodiment, the connector comprises a plate rotatable with the worm gear. A locking pin assembly, preferably spring loaded, secured to the sleeve or jib, as the case may be, may be used to releaseably lock the jib or sleeve to the plate through an aperture in the plate.
In one embodiment the speed reduction provided by the speed reducer is in the order of 1:60. Therefore, with the speed reducer concentric with the shaft on which the carrier is mounted, a Full 360 degrees continuous rotatable adjustment of the jib is provided while at all times giving the jib substantial torque provided by the ~otor is inversely proportional to the speed of the 1 motor. Therefore,by reducing the output of the motor through the use of the speed reducer, the torque from the motor is increased giving the jib greater leverage for use to lift and/or move materials as for example, hydroelectric wires carried by adjacent hydro poles, during repair opera~ions.
S Theinvention will now be illustrated with reference to the following drawings of an embodiment thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a truck carrying a boom supporting a bucket carrier and jib assembly thereon according to one embodi~ent of the invention.
Figure 2 is a close up perspective view of part of the structure shown in Figure 1.
Figure 3 illus~rates the struc~ure shown in Figure 2 in another position.
Figure 4 is a schematic side view of the 360 rotational ability of the jib assembly according to the embodiment of the invention.
Figure 5 is a side view of a portion of the drive mechanism used ~or rotating the jib assembly according to the embodiment of the invention.
DETAILED DESCRIPTION OF THE DRAWINGS
With reference to figure 1, there is shown truck 10 comprising cab 12 and trailer 14 at the rear of truck 10. Articulated bocm 16 is supported on trailer 14 and comprises lower boom arm 18 upper boom arm 20 folded over lower arm 18 and pivotal at 22 with respect to lower boom arm 18.
With reference to Figures 1 to 4 a pair of bucket carriers only one of which is shown at 26 are mounted at the ends of shaft 28 extending through boom arm 20 proximate end 24. Assembly 30 is interposed between the ends of shaft 28 and each bucket carrier 26 for the change of the relative position of bucket carrier 26 with respect to the end of shaft 28 by thc rotation of annular ring 32. Plate 34 is secured to each end of shaft 28 and carrier two arms 36 and 38 extending away from shaft 28 a 1 secured to bucket carrier 26. Arms 36 and 38 carry axis 40 to which is secured gear 42. Ring 32 is secured to shaft 44 supported by arms 36 and 38, shaft 44 carries on its lower end gear ~6 meshed with gear 42. Therefore, as ring 32 is rotated, gear 46 is rotated about gear 42 rotating bucket carrier 26 relative to end 28.
Mounted concentrically with shaft 28 is speed reducer 50 (see Figures 3,4 and 5) manufactured by Amador Hydraulic Services Limited under model AHJ-500, and comprises worm gear 52 driven by worm 54 driven by hydraulic motor 56 for reducing the speed and thus the output of the motor by a ratio of 1:60. Hydraulic motor 56 is a Char-lynn Motor no. 101-1029. Speed reducer 50 and hydraulic motor 56 are secured to boom 20 by bolts or cap screws (see Figure 3). Cover plate 60 covers worm gear 52 and is adapted to rotate therewith. Plate 60 includes apertures 62 and 64 for receiving to bolts or cap screws 66 and 68 secured to arms 70 and 72 secured to metal sleeve 74 of the jib assembly. Sleeve 74 carries an aperture 75 therethrough which locking pin 76 extends. Sleeve 74 carries jib 78 having apertures 80 aligned with aperture 75. When jib 78 is mounted in sleeve 74, jib 78 is slidable in the sleeve 74 until locked by pin 76 passing through one of apertures 70 and aperture 75. As is apparent from Figure 4, worm gear 52 of speed reducer 50 is concentric with shaft 28 of bucket carrier 26 a full 360 continuous rotation.
Thus jib 78 is rotatable about shaft 28 a full 360 for maximum adjustability.
Worm gear 52 is freely rotatable relative to shaft 28. Because the torque provided by motor 56 is inversely proportional to the speed of motor 56, by reducing the speed of the motor through the use of the speed reducer to rotate the jib 78 and sleeve 74, jib 78 has a greater ability for lifting and moving, for example, overhead wires on telephone poles.
As many changes can be made to the embodiment of the invention without departing from the scope of the invention, it is intended that all matter con-tained herein be interpreted as illustra~ive of the invention and not in a limiting sense.
Claims (10)
IS CLAIMED ARE AS FOLLOWS:
1. An improved jib assembly for use with an articulated boom carried by a work truck and which boom carries at least one workperson carrier on a freely rotatable shaft extending through the boom, the jib assembly comprising a jib, a speed reducer comprising a worm gear and a worm for rotating the worm gear, the worm gear concentric with the shaft carrying the at least one carrier, the worm gear freely rotatable relative to the shaft, a motor for driving the worm gear, a connector for connecting the jib to the worm gear to rotate the jib with the worm gear as the worm gear is rotated by the worm to provide continuous 360 degree rotation to the jib.
2. The improved jib assembly of Claim 1, wherein the motor is a hydraulic motor.
3. The improved jib assembly of Claim 1, wherein the jib is carried in a sleeve with the jib slideable in the sleeve and lockable therein and the sleeve is connected by the connector to the worm gear.
4. The improved jib assembly of Claim 2, wherein the jib is carried in a sleeve with the jib slideable in the sleeve and lockable therein and the sleeve is connected by the connector to the worm gear.
5. The jib assembly of Claim 1 or 2, wherein the connector comprises a plate rotatable concentrically with the worm gear.
6. The jib assembly of Claim 3 or 4, wherein the connector comprises a plate rotatable concentrically with the worm gear.
7. The jib assembly of Claim 1, wherein the speed reduction provided by the speed reducer is in the order of about 1:60.
8. The jib assembly of Claim 2, wherein the speed reduction provided by the speed reducer is in the order of about 1:60.
9. The jib assembly of Claim 3, wherein the speed reduction provided by the speed reducer is in the order of about 1:60.
10. The jib assembly of Claim 4, wherein the speed reduction provided by the speed reducer is in the order of about 1:60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000419913A CA1198691A (en) | 1983-01-20 | 1983-01-20 | Jib assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000419913A CA1198691A (en) | 1983-01-20 | 1983-01-20 | Jib assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198691A true CA1198691A (en) | 1985-12-31 |
Family
ID=4124392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000419913A Expired CA1198691A (en) | 1983-01-20 | 1983-01-20 | Jib assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1198691A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838381A (en) * | 1988-03-17 | 1989-06-13 | Posi-Plus Technologies Inc. | Articulated boom jib assembly |
| EP0460723A2 (en) * | 1990-06-04 | 1991-12-11 | OP PAGLIERO S.p.A. | Electromechanical group for the automatic control of the correct position of aerial cabs mounted on hoist machinery |
| EP0522315A1 (en) * | 1991-07-12 | 1993-01-13 | OP PAGLIERO S.p.A. | A lifting and positioning structure for an aerial platform, particularly for use in elevating machines |
| US5337854A (en) * | 1992-03-19 | 1994-08-16 | Ontario Hydro | Jib assembly |
| EP0802154A2 (en) * | 1996-03-16 | 1997-10-22 | Alexander Decker | Leveling-system for working plateforms |
| US7357263B2 (en) | 2006-03-22 | 2008-04-15 | Altec Industries, Inc. | Articulating jib |
-
1983
- 1983-01-20 CA CA000419913A patent/CA1198691A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838381A (en) * | 1988-03-17 | 1989-06-13 | Posi-Plus Technologies Inc. | Articulated boom jib assembly |
| EP0460723A2 (en) * | 1990-06-04 | 1991-12-11 | OP PAGLIERO S.p.A. | Electromechanical group for the automatic control of the correct position of aerial cabs mounted on hoist machinery |
| EP0460723A3 (en) * | 1990-06-04 | 1992-10-28 | Op Pagliero S.P.A. | Electromechanical group for the automatic control of the correct position of aerial cabs mounted on hoist machinery |
| EP0522315A1 (en) * | 1991-07-12 | 1993-01-13 | OP PAGLIERO S.p.A. | A lifting and positioning structure for an aerial platform, particularly for use in elevating machines |
| US5337854A (en) * | 1992-03-19 | 1994-08-16 | Ontario Hydro | Jib assembly |
| EP0802154A2 (en) * | 1996-03-16 | 1997-10-22 | Alexander Decker | Leveling-system for working plateforms |
| EP0802154A3 (en) * | 1996-03-16 | 1999-09-08 | Alexander Decker | Leveling-system for working plateforms |
| US7357263B2 (en) | 2006-03-22 | 2008-04-15 | Altec Industries, Inc. | Articulating jib |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |