JP2003500223A - Snap chuck assembly, snap tool and tool drive system - Google Patents

Abstract

The tool (180) has a shank (182), a tool structure (186) at the outer end of the shank, and a spline structure (184) at the inner end of the shank. In some embodiments, the shank (182) also has a polygonal structure (188) and / or an annular groove (190) in the shank. It may be a polygonal structure (188). The chuck assembly (10) includes a central bore (16), three axially and radially movable jaws (14), and at least one detent (28) between the two jaws. At least one inwardly extending passageway (24) and a nose collar (34) are included. A drive structure (24) as an insert (12) is provided in the central bore and mates with the drive structure with a shank. The axial movement of the tool is regulated by jaws or detents.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a snap chuck assembly and a snap tool or tool holder for use in the snap chuck assembly. More specifically, the present invention is a snap chuck having an axially movable or rotatable nose for initiating or releasing gripping of a tool or tool holder received within a chuck assembly. Assemblies and tools having shanks, drill bits, screwdrivers, cruciform screwdrivers, or other tools or instrument formations on the outer end of the shank and spline formations on the inner end of the shank. The invention also includes an insert received in an inner bore portion, a structure for preventing rotation of the insert with respect to the chuck, a structure on the insert for mating with an inner end of a tool or tool holder, and a tool. Or a mechanism for restraining axial movement of the tool holder relative to the insert for use with a chuck.

[0002]

[Prior Art and Problems to be Solved by the Invention]

Many tools have been proposed so far for mounting inside the chuck assembly.

The similar and dissimilar chuck assemblies and rows of tools and tool holders proposed so far are disclosed in the following similar and dissimilar US patents.

[0004]   U.S. Patent Number Patent Holder   2,728,365 Austin   2,807,473 Kiehne   3,945,653 Falche   4,188,041 Soderberg   4,199,160 Bent   4,209,182 Sheldon   4,692,073 Martindell   4,900,202 Wienhold   5,013,094 Wienhold   5,193,824 Salpaka   5,417,527 Wienhold   5,458,445 Bader, outside   5,464,229 Salpaka   5,465,983 Owens, outside   5,470,180 Jore   5,674,031 Biliz, outside   5,921,562 Robinson   5,951,026 Harman, Jr. , Outside   5,984,596 Fehrle, outside   5,975,815 Zierpka, outside

[0005]

[Means for Solving the Problems]

In accordance with the present invention, there are three substantially equally spaced outer end portions, an outer circumference, and a central axial bore extending at least a portion of the chuck body and further opening onto the central bore. A chuck body having a generally axially extending jaw receiving slot, mounting means for mounting the chuck assembly on an outer end of the shaft of a drive mechanism, and three chucking members received in each of the axially extending slots. An axially and radially displaceable jaw, a moving means for moving the jaw relative to a tool or tool holder or other accessory received in the central bore, and attached to the outer end portion of the chuck body. The nose collar and the structure inside the central bore to fit the shank and prevent the shank from rotating with respect to the chuck body. Obtain the chuck assembly is provided.

[0006] Preferably, the outer end portion of the chuck body extends inwardly from the outer periphery of the chuck body into an opening open towards the central bore and has a diameter less than the diameter of the radial bore. At least one bore extending radially at, and at least one ball or detent within the at least one radial bore, for propelling the ball or detent to the radial bore and to part of the opening A propulsion mechanism,
And a release mechanism for moving the ball or detent radially outward and away from the opening.

The invention further provides a tool with a smooth shank, a tool or instrument formation at the outer end of the shank, and a spline formation at the inner end of the shank. In some embodiments, the shank also has a polygonal formation thereon, eg, a hexagon, and an annular groove within the shank that may reside within the region of the polygonal formation. There is.

The invention also provides a chuck assembly including a chuck body having an outer end portion, an outer periphery, and a central bore extending at least partially through the chuck body along a central axis. The chuck body further has three substantially equally spaced generally axially extending jaw receiving slots that open onto the central bore and for mounting the chuck assembly on the outer end of the drive mechanism shaft. It has a mounting structure. The three axially and radially movable jaws are
Receiving in individual axially extending slots. A mechanism is provided for moving the jaws relative to the shank of the tool or tool holder received in the central bore. The chuck body has at least one inwardly extending passageway located between two axially extending slots in the chuck body, the passageway extending inwardly from an outer periphery of the chuck body to an opening that opens into a central bore. It is growing. The opening has a diameter less than the diameter of the passage and the passage is provided with at least one detent. The structure for propelling the at least one detent toward the central bore is provided with a mechanism for releasing the engagement of the at least one detent with the shaft or shank received within the central bore. A nose collar is attached on the outer end portion of the chuck body. The central bore is provided with a drive structure for mating with a complementary drive structure on the shank of the tool or tool holder received in the central bore of the chuck body, which causes the chuck assembly to have a complementary structure. It is possible to impart rotational drive to the tool or tool holder by mating with both drive structures, and this allows axial movement of the shank of the tool or tool holder received in the central bore of the chuck body to move with the jaws. By mating with the shank, or by mating at least one detent and the shank received in the central bore, or by mating both.
Suppressed, if not prevented.

In one embodiment, the nose collar is mounted for rotation, the propulsion structure comprises a cylindrical wall portion of the cylindrical void within the nose collar, and the release mechanism comprises at least the cylindrical wall portion. Comprising one or more voids or pockets constructed and arranged to be aligned with at least one passageway including one detent, wherein rotation of the nose collar causes at least one return in at least one passageway. The stop can leave the opening and enter one of the pockets.

In another embodiment, the nose collar is installed for axial movement relative to the outer end portion of the chuck body and the propulsion structure has a diameter within the nose collar that is substantially the same as the outer circumference of the outer end portion of the chuck body. A first cylindrical wall portion of the cylindrical void is provided, and the release mechanism comprises a second cylindrical wall portion having a diameter greater than the outer diameter of the outer end portion, whereby the axial direction of the nose collar. To position the second cylindrical wall portion in the region of the at least one passage and the internal at least one detent is moved outward laterally away from the opening of the at least one passage, Enter the central bore.

Further in accordance with the invention, it is constructed to receive an outer portion of a bore for receiving a tool or tool holder and an outer end of a motor shaft of a power tool and to be installed on the outer end. A tool drive system is provided for use with a chuck having a throughbore including an inner bore portion. The system includes an insert received in the inner bore portion, a structure for preventing rotation of the insert relative to the chuck, a structure on the insert for mating with the inner end of the tool or tool holder, and the tool or tool. And a mechanism for preventing or restraining axial movement of the holder or other accessory relative to the insert.

[0012]

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings in detail, FIG. 1 shows a longitudinal side view of one embodiment of a chuck assembly 10 constructed in accordance with the teachings of the present invention. The chuck assembly 10 includes a chuck body 12 and at least three jaws 14 that are axially and radially movable relative to the chuck body 12 in and out of a central chuck hexagonal bore 16. One of the jaws is shown in FIG. On the chuck body 12, the chuck body 12 is rotatable and the jaw 1
A sleeve 18 is mounted for moving 4 into and out of central bore 16.

The chuck body 12 includes an outer end portion 22 having at least one, and preferably three, radial transverse bores 24 therein, the radial bores 24 being the outer end portions 2.
A central bore 1 having an opening 26 through which is smaller than the diameter of the radial bore 24.
6 is open and extended. A ball 28, similar to a ball bearing, is received in each radial bore 24 and has an inner wall 30 of a cylindrical void 32 in a nose collar 34.
Supported by. To accomplish this, the outer end portion 22 is configured such that the length of the radial bore 24 is less than the diameter of the ball 28, or a second bore in each bore 24.
It is fully anticipated that the ball or other spacing element will have a reduced outer diameter so that it can be delivered.

The hexagonal cross section of the central bore 16 may be limited to the area of the radial bore 24 as shown.

As shown in FIGS. 1, 2 and 4, the nose collar 34 has two spaced pockets or recesses 36 for the fingers to fit, the user gripping the collar 34 and rotating it 90 degrees. Can be made.

As shown in FIGS. 3 and 4, the inner wall 30 of the cavity 32 in the nose collar 34 has three recessed pockets 38, which are arranged 120 rotated relative to each other, one of which is the outer one. It is arranged at a position 90 ° from one pocket 36 or in alignment with one outer pocket 36.

The outer end portion 22 further has a C-ring 39 mounted on its outer periphery 40 for axial engagement with a flange 41 extending inwardly of the nose collar 34, which allows the nose collar 34 to be chucked. It is held by the main body 12.

In use, conventional tools or specially configured tools 42 (FIG. 5)
Stem or shaft is inserted into the central bore 16 and rotation of the sleeve 18 moves the jaws 14 into engagement with the stem of the tool 42.

Alternatively and in accordance with the teachings of the present invention, a specially configured tool 42 (
5) can be inserted into the bore 16. In this case, the stem 44 of the tool 42 has a hexagonal cross section that fits into the central hexagonal bore 16. Tool 42
It has a cross-shaped head 46 and an annular groove 48, and the annular groove 48 is provided in the nose collar 3
4 in the position shown in FIG. 3 with each ball 28 in a radial straight line between the opening 26 towards the central hexagonal bore 16 and the pocket 38 in the wall 30 inside one radial bore 24. If so, it can be moved into alignment with ball 28.

This allows a tool, such as tool 42, to be axially inserted through the ball 28 into the central bore 16 such that the ball 28 is radially aligned with the annular groove 48. At this point, the user rotates the nose collar 34 to rotate the pocket 38.
Away from the ball 28, thereby moving the surface of the cylindrical wall 30 against the ball 28, propelling the ball 28 towards the opening 26 and further into the opening 26 leading to the central bore 16. You can

A tool, such as tool 42, is then inserted into the central hexagonal bore 16 of chuck body 12.
For removal, the user places his thumb and another finger in the pocket 36 to grasp the nose collar 34 and rotate the nose collar 90 ° to move the pocket 38 on the inner wall 30 of the cavity 32 into the radial bore 24. Align. This allows the ball 28 to move inwardly within the radial bore 28 and into the pocket 38 when the tool 42 is pulled, causing the tool 42 to be axially disengaged from the central chuck bore 16. It is possible to

The tool 42 shown in FIG. 5 includes a shank or stem 44 having a hexagonal cross section, a cross-shaped head 46, and an annular groove 4 inside the shank or stem 44 having a hexagonal cross section.
Including 8 and.

It is understood that the tool 42 can be provided with other types of tool heads such as a drill tool head or a straight screwdriver head instead of the cruciform screwdriver head 46. Will.

FIG. 6 shows a central stem portion 52, a hexagonal cross-section inner end 54 having an annular groove 56 therein, and a special drill head for drilling a hole larger than the diameter of the stem portion 52. Alternatively, another tool 50 having a spade bit 58 is shown.

FIG. 7 shows a tool holder 60 that can be of the type disclosed in Robison US Pat. No. 5,921,562. Tool holder 6
0 has a central stem portion 62 that differs from the stem disclosed in US Pat. No. 5,921,562. In this regard, the stem portion 62 is modified to retain a hexagonal internal cross-sectional area 64 having an annular groove 68 within the hexagonal internal cross-sectional area 64, which causes the tool holder 60 to be positioned within the central hexagonal bore 16. Accepted by
And is axially fixed therein by a ball 28 received in an annular groove 68, and the engagement of the hexagonal internal cross-sectional area 64 with the central hexagonal bore 16 prevents rotation within the bore. Has been adapted to.

The tool holder 60 further includes a mushroom head 70 having a cavity 72 for receiving the tool and a cavity 7 for releasably retaining the tool within the cavity 72.
2 has a magnet 74 at the bottom. The tool holder 60 is further
Spline shape 78 for receipt within spline portion 80 of central bore 16.
Including an inner end 76 having. The central bore 16 spline portion 80 can be of the type disclosed in Salpaka US Pat. No. 5,193,824, the disclosure of which is incorporated herein by reference.

8 and 9, a second embodiment of a chuck assembly 90 constructed in accordance with the teachings of the present invention is shown. The chuck body 92 in this case has the same structure as the chuck body 12 shown in FIGS. 3 and 4, with an outer end portion 93. However, in this embodiment, the nose collar 94 is configured for axial movement rather than rotational movement. In this regard, as shown in FIG. 8, the nose collar 94 has at least two recessed recessed pockets or recesses 96 on its outer surface to grasp and pull or push the nose collar 94 to secure the nose collar 94 to the chuck assembly 90. It is possible to move in the direction of the axis. The interior of the nose collar 94 is then frictionally mated with one or more balls 28 within the radial bore 24 to open them into the central chuck bore 16 through the openings 2 of each radial bore 24.
A first cylindrical portion 100 having a diameter that drives it to 6 and partially passes through it.
Has a stepped void 98 including. The void 98 then has a stepped larger cylindrical portion 102 positioned inside the cylindrical wall portion 100.

In use, as shown in FIG. 9, when the nose collar 94 is grasped and pulled outwardly, a cylindrical wall portion 102 having the larger diameter of the void 98 is inserted into each radial bore 2.
4 are radially aligned with one or more balls 28 in 4 to allow them to move radially outward from an opening 26 that opens into a central bore 16, which allows the central hexagon of the tool to be moved. It can be inserted into or removed from the cross-section bore 16.

The nose collar 94 mates with a ring 108 mounted on the outer end portion 93 of the chuck body 92 to retain the nose collar on the outer end portion 93 and limit axial movement of the nose collar 94. Has a lower annular flange 106.

The outer end portion 93 of the chuck body 92 is smaller than each diameter of the ball 28 in each radial direction so that a frictional fit can be achieved between the ball 28 and the cylindrical wall portion 100 of the void 98. Note that it is possible to have a reduced diameter outer surface that provides the length of the bore 24.

Referring to FIG. 10, a chuck assembly 11 constructed in accordance with the teachings of the present invention.
A third embodiment of some 0's is shown. In the present embodiment, the chuck body 11
4 has an annular groove 116 in the region of the inner radial bore 24,
A C-ring or split ring or band 118 is received in the annular groove 116 to mate with the radially outward facing sides of each of the three detents or balls 28, each of which is associated with each of the radial bores 24. It is possible to propel it into one of the openings 26 at the inner end. In the present embodiment, the outer end portion 112 of the chuck body 114.
Does not have a reduced diameter than the rest of the chuck body 114. Further, in this embodiment, when the tool is inserted into the hexagonal bore 16, pressure is inevitably applied to move the ball 28 radially outwardly against the pressure of the spring band 118, causing the center of the chuck body 114 to move. Insertion of the tool into the hexagonal cross-section bore 16 is enabled. Similarly, when removing the tool from the hexagonal bore 16, the removal of the tool from the hexagonal bore 16 must be accomplished by applying a tensile strength that presses the ball 28 against the spring band 118.

FIG. 11 shows the outer circumference 120 of the chuck body 122. The bottom has a splined portion 124 of a central hexagonal bore 126 and Salpaka US Pat.
Peeled to show the inner threaded portion 128 of the chuck bore 126 that allows the chuck body 122 as disclosed in US Pat. No. 193,824 to be mounted on the threaded end of the power tool. ing.

FIG. 12 illustrates a chuck assembly 14 constructed in accordance with the teachings of the present invention.
0 fourth embodiment is shown. In this embodiment, the outer end portion 142 of the chuck body 144 does not have a reduced diameter as compared to the rest of the chuck body 144 and does not have any annular slot in the region of the ball 28 within the chuck body 144. . Instead, the nose collar 146 is provided with three radial bores 148 extending inwardly from the cylindrical wall 150 of the void 152 in the nose collar 146 and equally spaced around the perimeter of the wall. There is. A spring 154 is then inserted inside each of these three bores 148, and the nose collar 146 moves the chuck body 144 until the bore 148 having the spring 154 therein is aligned with the bore 24 having the ball 28 therein. Once axially moved over the outer end portion 142 and aligned, the compressed spring 154 causes one of the bores 148 to move into the radial bore 24 and each of the balls 28 within each radial bore 24. The back side of the ball, or the back side of the ball behind the pair of balls, and leans against it.

In order to ensure proper alignment of the nose collar 146 and the chuck body 144 and blocking rotation of the nose collar 146 relative to the chuck body 144, proper alignment means, such as mats extending axially, is provided. Inserted, chuck body 14
It will be appreciated that a key is provided between the outer end portion 142 of the No. 4 and the cylindrical wall 150 of the cavity 152 in the nose collar 146.

FIG. 13 illustrates the nose collar 34 shown in, for example, FIGS. 1, 3, 8, 9, and 12.
2 is an end view of one such nose collar, with the jaws 14 alternatingly positioned at the hexagonal corners of the bore 16 and the balls 2 at adjacent alternating corners of the hexagonal bore 16.
8 shows a central hexagonal internal cross-section bore 16 with 8 and 8.

FIG. 14 illustrates a tool 160 constructed in accordance with the teachings of the present invention. The tool 160 comprises a tool shank 1 such as a smooth shank 162, a spline shape 164 at its inner end and a cruciform screwdriver formation at its outer end.
66 is a simplified tool having 66. This tool 160 is adapted for easy and quick insertion into one of the chuck assemblies described above, and spline formation 1 for mating with spline formation 164 at the inner end of shank 162.
It is rotationally driven by 24. At the same time, the three spring biased balls 28 in one of the chuck assemblies squeeze the smooth shank 162,
The friction between the ball 28 and the smooth shank 162 provides a small but holding force against the axial movement of the tool 160 in one of the chuck assemblies described above.

In order to supply a stronger restraining force against the axial movement of the tool, FIG.
Has a shank 172, a spline formation 174 at the inner end of the shank 172, a tool formation 176 at its outer end, and an annular groove 178 for receiving one or more balls 28. A tool 170 can be provided.

It is desirable to provide a strong rotational drive between the tool and one of the chuck assemblies described above and an axial tensile strength that opposes axial movement of the tool relative to the tool and one of the chuck assemblies described above. In that case, a tool 180 as shown in FIG. 16 is supplied. As shown, the tool 180 includes a shank portion 18
2, a spline formation 184 at its inner end and a tool formation 186 at its upper end. Further on the shank, a hexagonal formation 188, preferably a hexagon, that mates with a complementary shape such as the hexagonal bore 16 shown in FIGS. An annular groove 190 is formed in the region of the polygonal formation 188.

The tools 160, 170 or 180, and the tools 42 and 50, and the tool holder 60 can be shared with any of the chuck assemblies described above, and the tools 160, 170 and 180, and the tools 42 and 50. It will be appreciated that 60 and the tool holder 60 have the advantages as described above. In particular, the tool 160 provides a very simple tool that can be pushed into and out of one of the chuck assemblies described above and held therein minimally against axial movement in the chuck assembly. There is. Upon encountering movement of the tool 160, the user simply rotates the outer sleeve of the chuck assembly,
In addition to fitting the ball or detent 28 into the shank 162, the jaws can fit into the shank 162.

Alternatively, a very strong holding force against axial movement of the tool is desired,
Or, if desired, the engagement of annular grooves 178 or 190 that prevent axial movement of tools 170, 180, as described above, into conventional chucks with internally mounted balls or detents 28. Any tool 170 or 180 that can be easily and simply inserted can be used.

To obtain a more powerful rotary drive, a tool 180 having polygonal, hexagonal formations 188 and spline formations 184 can be shared with one of the chuck assemblies described above.

Further, the nose collar 34 that can rotate the chuck assembly 10 or 90.
Or shared with the nose collar 94 that can move in the axial direction, and use the shanks 44, 52, 6
One or more balls 28 can be fixed or released relative to 2, 162, 172 or 182.

Referring now to FIG. 17, there is a drive insert 212, a conventional chuck 214, a tool holder 216 (which may be a tool), and a tool holder when the tool holder is used. A tool drive system 210 is shown that includes a tool 218 that can be received within 216. The insert 212 includes a base portion 220 and a tool holder 216 (or a tool holder 21
Stem 230 of the tool if directly inserted into chuck 214 instead of 6)
A projection 222 having a structure such as a spline shape 224 for mating with a complementary structure 226 inside the void 228 at the inner end 229 of the.

FIGS. 18, 23, 33 and 41 show hexagonal voids 233 in the outer mushroom head or end portion 234 of the tool holder 216 shown individually in FIGS. 17, 22, 32, 39 and 45. FIG. 19 is a bottom end view of tool 218 having a base or stem 232 having a received hexagonal shape.

FIGS. 19, 24, 34, 42 and 46 are outer end views of the tool holder 216 shown in FIGS. 17, 22, 32, 39 and 45.

20 and 35 show a tool holder 216 shown individually in FIGS. 17 and 32.
FIG.

Referring now to FIGS. 17 and 28, the base 220 of insert 212 is shown in FIG.
It can be seen that 1 has three splines or keys 236 adapted to be slidably received in keyways or slots 238 formed in bore inner portion 240 of chuck 214 as shown.

A typical configuration of base 220 is shown in FIG. 28, which depicts three keys or splines 236 on the perimeter of base 220.

In use of the tool drive system 210 shown in FIG. 17, the insert 212 is inserted into the bore inner portion 240 shown in FIG. 21, and the key or spline 236 is received in the keyway or slot 238. The chuck 214 is then threaded on the motor shaft of a power tool (not shown). This can be accomplished using a tool that is received and rotated over the spline shape 224 on the protrusion 222 of the insert 218.

When the chuck 214 and insert 212 are attached to the threaded outer end of the power tool motor shaft, the tool holder 216 is inserted into the bore outer portion 242 in the chuck 214 and at the inner end 229 of its stem 230. Void 228
Are received on spline features 224 on protrusions 222 of insert 212 to provide a drive connection between insert 212 and tool holder 216.

In the embodiment shown in FIGS. 17-21, the tool holder 216 is the tool holder 21.
It is held on the chuck by a magnet 244 located on the underside 246 of the six mushroom head 234. Tool 218 includes tool holder 216 as shown.
Is held in the head 234 by a magnet 246 located at the bottom of the hexagonal void 233 on the outer side 250 of the head 234.

In the tool drive system 210 shown in FIGS. 17-21, the three keyways or slots 238 must be cut into the bore inner portion 240 of the conventional chuck 214. Therefore, in the case of this modification, the insert 212 is the chuck 214.
Can be inserted into the bore inner portion 240 therein, and the threaded end of the power tool motor shaft is screwed into the threaded bore inner portion 240,
A chuck 214 having an insert 212 inside is attached to the motor shaft of the power tool. See, for example, the chuck assembly shown in Salpaka, US Pat. Nos. 5,193,834 and 5,464,229.

In use, the operator can then rotate a portion of the chuck 214 to mate the jaws in the chuck 214 with the shaft or stem 230 of the tool or tool holder 216, or simply the tool or tool. The specially configured inner end 229 of the stem or shaft 230 of the holder 216 can be moved to fit into the protrusion 222 of the drive insert 212. A special configuration includes a spline or polygon shaped void 228. Tool or tool holder 2
16 is chuck 212 by means of a magnet such as magnet 244 associated with it.
Can be retained on the projection 222 of the insert 212.
And axial movement of the tool or tool holder 216 is suppressed while the complementary spline or polygonal shape due to the void 228 in the stem 230 of the tool or tool holder 216 provides the tool drive for driving the tool from the axis of the power tool. To be done.

Referring now to FIGS. 22-26, a mushroom-shaped head 234 with a tool 218 and a void 233, a stem, shaft or shank 2 extending downwardly from the head 234.
30 and a tool or tool holder 216 with a tool holder 216 having an inner free end 262 having a spline or polygonal shape 264;
4 and a drive insert 266, another embodiment of a tool drive system 260 is shown. The drive insert 266 has a base portion 268 having three keys or splines 270 on its outer circumference and a shape 2 that fits into a spline or polygonal shape 264 at the inner end 262 of the stem 230 of the tool holder 216.
And an internal void 272 having 74 (FIG. 27). It is understood that a tool with a lower inner end having a spline or polygonal shape configured to fit the shape 274 in the cavity 272 of the drive insert 266 can be provided in place of the tool holder 216 and tool 218. Will

The through bore inner portion 240 of the chuck 214 shown in FIG.
It has the same shape as that shown in FIG. 1 and is adapted to receive the insert 266 shown in FIG. In this method, the drive connection from the threaded end of the motor shaft to the chuck 214 and the drive insert 266 is configured and shaped to be received in the inner end 262 of the tool holder 216 or in the void 272 in the insert 266. Can be delivered to the inner end of the tool.

FIG. 27 is a top view of the drive insert 266 shown in FIG. 22, and FIG. 28 is a top view of the drive insert 212 shown in FIG.

FIG. 29 is an end view of the lower end of the chuck 214 shown in FIG. 32 without the central spline bore portion 280, and FIG. 30 is an end view of the outer end of the chuck 214 shown in FIGS. 17 and 22. Is.

FIG. 31 is an enlarged view of a conventional chuck 214, with a throughbore 276 passing through the chuck 214, a jaw 278 movable into the throughbore 276, and the chuck 214 with a threaded end of the power tool motor shaft. 9A illustrates a central spline bore portion 280 of a through bore 276 for receiving a dedicated tool for attachment thereto and a threaded inner portion 240 of the through bore 276. Also shown is the keyway 38 formed in the threaded bore inner portion 240.

FIG. 32 is an exploded view of another embodiment 290 of a tool drive system according to the present invention that is similar to the tool drive system 210 shown in FIG. The tool drive system 290 shown here includes a drive insert 292, a chuck 214,
It includes a tool holder 216 and a tool 218. The end views shown in FIGS. 33, 34 and 35 correspond to the end views shown in FIGS. 18, 19 and 20. In the tool drive system 290, no keyway is formed in the threaded bore inner portion 240 as shown in FIGS. 32 and 36, and in this embodiment the drive insert 292 is a threaded cylindrical base portion 294. And FIG.
And a protrusion 296 corresponding to the protrusion 222 indicated by.

In the tool drive system 290 according to this embodiment, the insert 292 is screwed in until it reaches the bottom of the threaded bore inner portion 240 and is locked in place. The chuck 214 is then moved to engage the protrusions 296.
Is threadedly mounted on the threaded motor shaft of a power tool, such as one having a socket tool (not shown) inserted through the through bore 276 of the. The tool holder 216 can then be held to the chuck 214 by the magnet 244 shown in FIG. Next, the tool holder 21
6 is rotationally driven by the fitting of a spline or polygonal protrusion 296 in a void 228 in the inner end 229 of the stem, shaft or shank 230 of the tool holder 214.

FIG. 39 is an exploded view of still another embodiment 300 of a tool driving system according to the present invention. In this case, the inner end 304 of the shank 230 of the tool holder 216 receives the protrusion 306, which has a square inner cross section of the drive insert 308.
A tool holder 216 is provided having a void 302 with a square inner cross-section at. Insert 308 is similar to insert 212 shown in FIG. 17, except that protrusion 306, which has a square internal cross section, has protrusion 30 as shown in FIG.
6 with spring biased detents 310 mounted in lateral slots 312 in 6. The insert also has a base 312 having three splines or keys 314 for reception in complementary keyways 316 formed in the inner portion 240 of the throughbore 276 in the chuck 214.

In the tool driving system 300 according to the present embodiment, the spring bias type detent 310 has a mechanical mechanism for suppressing the axial movement of the tool holder 216 or the tool having an air gap at its inner end with respect to the chuck 214. We are supplying. The tool holder 216 or a tool having an air gap at its inner end is used for the chuck 21.
When inserting another tool into 4, it must be pulled apart from the chuck 214 by force.

In this embodiment, a spring biased detent 310 is used in place of the magnet 244 to prevent axial movement relative to the chuck 214 by the tool holder 216 or similarly configured tool.

FIG. 45 illustrates yet another embodiment 320 of a tool drive system constructed in accordance with the teachings of the present invention. The tool driving system 320 uses the tool holder 216 shown in FIG. The tool holder 216 has a magnet 244 on the underside 246 of a mushroom-shaped head 234 and a stem or shaft 230 with an inner end 262 having a spline or polygonal shape 264.

In this embodiment, the drive insert 322 is inserted from the upper end of the chuck 214 into the through bore 276 of the chuck 214. The insert 322 includes an upper base portion 324 having a splined or polygonal void 326 therein and a chuck 214 to the insert 322 and then a void 326 in the upper base portion 324 of the insert 322 to the stem or shaft of the tool holder 216. 230
3 to achieve a drive connection to a splined or polygonal inner end 262 of FIG.
1 has a splined protrusion 328 that is received in the intermediate splined bore portion of FIG.

It should be appreciated that such drive may lead from the cavity 326 to the inner end of a specially configured tool adapted to be received in the cavity 326.

In this embodiment, the throughbore 328 is fed through the depending protrusion 328 and opens towards the void 326, so that the retainer screw 330 with the Allen head 332 is inserted through the insert 322 as shown in FIG. Can be inserted and screwed into the axially threaded bore at the threaded end of the motor shaft of the power tool.

One preferred embodiment of a tool drive system according to the present invention includes an insert, such as insert 292 shown in FIG. 22, which is threadably received in the threaded bore inner portion 240 of the through bore 276 in the chuck 214. , The tool drive system does not require any modification to chuck 214. Further, the chuck may be of the type shown in FIG. 31 having an intermediate spline bore portion 280 on the threaded bore inner portion 240 or a chuck without the intermediate spline bore portion 280. Further, such inserts include spring-biased detents 310 that are received in similarly shaped voids at the inner end of the tool or tool holder 216, except when the tool or tool holder 216 is forcefully pulled outward from the chuck 214. The protrusions shown in FIGS. 39 and 40 having can be utilized to snap axially relative to the chuck by the tool or tool holder 216 without the magnet 244. The last-described embodiment has a mechanical rather than a magnetic retention structure to support the tool or tool holder with the protrusions of the insert received within the chuck.

[Brief description of drawings]

FIG. 1 is a longitudinal side view of one embodiment of a chuck assembly constructed in accordance with the teachings of the present invention, with a portion peeled away.

2 is a partial side view of the chuck shown in FIG. 1 taken along line 2-2 of FIG.

FIG. 3 is a longitudinal plan view of a chuck similar to that shown in FIG. 1, but with the outer end portion or nose collar rotated 90 °.

4 is a cross-sectional view of the nose collar shown in FIG. 3, taken along line 4-4 in FIG.

FIG. 5 is a vertical plan view of one embodiment of a drill-type tool constructed in accordance with the teachings of the present invention.

FIG. 6 is a vertical plan view of another embodiment of a screwdriver tool constructed in accordance with the teachings of the present invention.

FIG. 7 is a vertical plan view of one embodiment of a tool holder constructed in accordance with the teachings of the present invention.

FIG. 8 illustrates a modified chuck body of a second embodiment of a chuck assembly constructed in accordance with the teachings of the present invention and locking detents (balls) radially in and out of a central hexagonal bore of the chuck assembly. FIG. 6 is a vertical cross-sectional view showing half of the nose collar of the chuck assembly used for moving,
The collar is shown to hold the detent / ball in a fixed position inward.

9 is a longitudinal cross-sectional view of the chuck body shown in FIG. 9, showing a detent / ball for placing the detent / ball in an unrestrained position allowing radial movement outward from a central hexagonal bore; Shows a state in which is moved outward in the axial direction.

FIG. 10 is a partial longitudinal cross-sectional view of the chuck body of a third embodiment of a chuck assembly constructed in accordance with the teachings of the present invention, with a detent / ball within a radially extending bore and a radial direction. And an annular groove having a split collar spring located in the region of the extending bore and having a detent / ball base therein for guiding the ball towards the central chuck bore.

FIG. 11 is a longitudinal side view of a chuck body for one embodiment of the chuck assembly disclosed herein, with the interior and bottom showing the central chuck bore spline region and the chuck bore threaded region. Has been stripped for.

FIG. 12 is a longitudinal cross-sectional view of a fourth embodiment of a chuck assembly according to the present invention, with the lateral bores in the nose collar adapted to be aligned with the radially extending bores in the chuck body. 10 shows a nose collar on the chuck body similar to that shown in FIG.

FIG. 13 is an end view of the chuck body of each of the four embodiments, with three jaws at three corners of the hexagonal bore and three jaws present at the other three corners of the hexagonal bore sandwiched between the jaws. Detents / balls are shown.

FIG. 14 is a plan view of a tool constructed in accordance with the teachings of the present invention having a smooth shank with spline formations on its inner end.

FIG. 15 is a plan view of a tool constructed in accordance with the teachings of the present invention having an annular groove therein and a smooth shank with spline formations on the inner end.

FIG. 16: Another tool constructed in accordance with the teachings of the present invention having a hexagonal portion, a smooth shank with an annular groove in the hexagonal region of the shank, and a spline formation at the inner end. FIG.

FIG. 17 is an exploded perspective view of one embodiment of a tool drive system according to the present invention including an insert, a chuck, a tool holder, and a tool associated with the chuck.

FIG. 18 is a bottom end view of the tool shown in FIG. 17, taken along line 18-18 in FIG.

19 is an outer end view of the tool holder shown in FIG. 17, taken along line 19-19 in FIG.

20 is an inner end view of the tool holder shown in FIG. 17, taken along line 20-20 of FIG.

21 is an inner end view of the chuck shown in FIG. 17 taken along line 21-21 of FIG.

FIG. 22 is an exploded view of another embodiment of a tool drive system according to the present invention, including an insert, a chuck, a tool holder, and a tool.

23 is a bottom end view of the tool shown in FIG. 22, taken along line 23-23 in FIG.

FIG. 24 is an outer end view of the tool holder shown in FIG. 22, taken along line 24-24 in FIG. 22.

25 is an inner end view of the tool holder shown in FIG. 22 taken along line 25-25 of FIG. 22.

26 is an inner end view of the chuck shown in FIG. 22 taken along line 26-26 in FIG.

27 is a top view of the insert shown in FIG. 22 taken along line 27-27 of FIG.

28 is a top view of the insert shown in FIG. 17 taken along line 28-28 of FIG.

FIG. 29 is an outer end view of the chuck shown in FIG. 28, with the middle spline portion at the top of the inner bore portion not shown.

FIG. 30 is an outer end view of the chuck shown in FIGS. 17 and 22 having a spline shape at the upper end of the inner bore portion taken along line 30-30 of FIGS. 17 and 22.

FIG. 31 is an enlarged view of the chuck with a portion peeled away to show the threaded bore inner portion and the intermediate spline portion at the upper end of the bore inner portion.

FIG. 32 is an exploded perspective view of another embodiment of a tool drive system according to the present invention having a threaded insert.

33 is a bottom end view of the tool shown in FIG. 32 taken along line 33-33 of FIG. 32.

34 is an outer end view of the tool holder shown in FIG. 32 taken along line 34-34 in FIG. 32.

35 is an inner end view of the tool holder shown in FIG. 32 taken along line 35-35 in FIG. 32.

36 is an outer end view of the chuck shown in FIG. 32 without the intermediate spline portion taken along line 36-36 of FIG. 32.

37 is an interior end view of the insert shown in FIG. 32 taken along line 37-37 in FIG. 32.

38 is an outer end view of the insert shown in FIG. 32 taken along the line 38-38 of FIG. 32.

FIG. 39 is an exploded view of another embodiment of a tool drive system according to the present invention that includes an insert, a chuck, a tool holder, and a tool.

40 is a longitudinal sectional view of the insert shown in FIG. 39. FIG.

41 is an inner end view of the tool stem shown in FIG. 39 taken along line 41-41 of FIG. 39.

42 is an outer end view of the tool holder shown in FIG. 39 taken along line 42-42 of FIG. 39.

43 is an inner end view of the tool holder shown in FIG. 39, taken along line 43-43 in FIG. 39.

44 is an inner end view of the chuck shown in FIG. 39 taken along line 4-43 in FIG. 39.

FIG. 45 is an exploded view of yet another embodiment of a drive system according to the present invention that includes an insert according to the present invention, a chuck, a tool holder, and a tool.

46 is an outer end view of the tool holder shown in FIG. 45 taken along line 46-46 of FIG. 46.

47 is an end view of the screw with the Allen head shown in FIG. 45 taken along line 47-47 in FIG. 45.

48 is an inner end view of the tool holder shown in FIG. 45 taken along line 48-48 of FIG. 45.

49 is a bottom view of the insert shown in FIG. 45 taken along the line 49-49 in FIG. 45.

50 is a top view of the insert shown in FIG. 45 taken along line 50-50 of FIG. 45.

51 is a bottom view of the chuck shown in FIG. 45 taken along line 51-51 in FIG. 45.

─────────────────────────────────────────────────── ─── Continued front page    (31) Priority claim number 09/522, 229 (32) Priority date March 9, 2000 (2000.3.9) (33) Priority claiming countries United States (US) (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, I T, LU, MC, NL, PT, SE), OA (BF, BJ , CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, K E, LS, MW, MZ, SD, SL, SZ, TZ, UG , ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, C U, CZ, DE, DK, EE, ES, FI, GB, GE , GH, GM, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, L T, LU, LV, MD, MG, MK, MN, MW, MX , NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, U A, UG, US, UZ, VN, YU, ZW

Claims (66)

[Claims] 1. A chuck assembly having an outer end portion, an outer periphery, a central bore along a central axis, and an opening toward a mounting means of the central bore, the chuck assembly being mounted on a shaft of a drive mechanism. A chuck body having three equally spaced axially extending jaw receiving slots open toward the mounting means of the central bore for mounting on the outer end portion, and each of the axially extending slots. Three received axially and radially movable jaws, and moving means for moving the jaws against the shank of the tool or tool holder received in the central bore, The chuck body is further provided with three equally spaced, inwardly extending bores, each bore of a slot extending axially within the chuck body. And an inwardly extending bore in each of the two extends from the outer periphery of the chuck body to an opening that is open inward toward the central bore, the opening extending inwardly. Having a diameter less than the diameter of the extending bores, the chuck assembly further includes at least one detent provided in each inwardly extending bore and associated with each inwardly extending bore. Spring biasing means for elastically pressing the stop in the direction of the central bore and for mating with a mating drive structure on the shank of the tool or tool holder received in the central bore of the chuck body. A drive structure provided in the central bore, the chuck assembly providing a rotational drive force to the tool or tool holder. And axial movement of the tool or tool holder received in the central bore of the chuck body is restricted by mating the jaws and / or detents with the shank of the tool or tool holder, A chuck assembly characterized by the above. 2. The spring biasing means includes a C-ring or split ring spring band received in an annular groove located within the outer circumference of the chuck body and extending over an inwardly extending bore of the three bodies, the detent being provided with the detent. The chuck assembly according to claim 1, wherein the chuck assembly is pushed into the bore extending inward and halfway through the opening. 3. The chuck of claim 1, wherein the spring biasing means includes a spring in each inwardly extending bore and a structure for retaining each spring in each inwardly extending bore. assembly. 4. The chuck assembly of claim 1, wherein the drive structure includes a spline shaped portion within a central hole of the chuck body. 5. The chuck assembly of claim 1, wherein the drive structure includes a polygonal portion within the central bore of the chuck body. 6. The chuck assembly according to claim 1, wherein the drive structure includes a polygonal portion in a central bore of the chuck body and a splined portion at an inner end portion thereof. 7. A chuck assembly according to claim 4, which is combined with a tool or tool holder having a mating spline drive structure on the shank at the inner end portion. 8. The chuck assembly of claim 7, wherein the shank of the tool or tool holder has an annular groove for receiving a detent to prevent axial movement of the shank. 9. The chuck assembly of claim 5 wherein the shank has a mating polygonal drive structure. 10. The chuck assembly of claim 9, wherein the shank of the tool or tool holder has an annular groove for receiving a detent to prevent axial movement of the shank. 11. The chuck assembly of claim 10, wherein the annular groove is located in the region of the shank having the polygonal drive structure. 12. The chuck according to claim 6, wherein the shank has a fitting polygonal driving structure, and the shank is combined with a tool or a tool holder having a fitting polygonal driving structure at an inner end portion thereof. assembly. 13. The tool or tool holder shank has an annular groove for receiving a detent to prevent axial movement of the shank.
2. The chuck assembly according to 2. 14. The chuck assembly of claim 13, wherein the annular groove is located in a shank region having a polygonal drive structure. 15. The chuck assembly of claim 1 in combination with a tool or tool holder having an annular groove that receives a detent to prevent axial movement. 16. The chuck assembly according to claim 5, wherein the pressing force of the spring biasing means causes the tool or tool holder to be manually pushed into or pulled out of the central bore. 17. The chuck assembly of claim 1, wherein the detent is a ball. 18. A combination of a chuck assembly and a tool or tool holder, comprising an outer end portion, an outer periphery, a central bore along a central axis, and three equally spaced bodies open toward the central bore. A chuck body having an axially extending jaw receiving slot provided to the chuck body; mounting means for mounting the chuck assembly on an outer end portion of a shaft of a drive mechanism; and a chuck body received in each of the axially extending slots. The chuck body includes three axially and radially movable jaws, and moving means for moving the jaws against a shank of the tool or tool holder received in the central bore. Further, it is located in the chuck body between the two slots extending in the axial direction, and is located inward from the outer circumference of the chuck body in the central position. Having at least one inwardly extending passage extending to an opening that is open toward the opening, the opening having a diameter less than the diameter of the inwardly extending bore; Further comprising at least one ball or detent provided within said passage, and spring biasing means associated with said passage for resiliently biasing said ball or detent toward said central bore; A drive structure provided in the central bore for mating with a mating drive structure received on the shank of the tool or tool holder received in the central bore of the chuck body; The tool holder has a shank with a mating drive structure for axial movement of the tool or tool holder received in the central bore of the chuck body. Is restricted by mating the jaws or balls and / or detents with the shank of the tool or tool holder. 19. The tool or tool holder shank has an annular groove in a position to mate with at least one ball or detent, the tool or tool holder extending the tool or tool holder from a central bore. 19. The combination of claim 18, wherein the ball or detent is held open to prevent axial movement when received in the groove, except when a pulling force is applied. . 20. The drive structure in the central bore includes a spline feature in the central bore, and the drive structure on the shank is a mating spline structure. Combination of. 21. The drive structure within the central bore includes a polygonal portion within the central bore, and the drive structure on the shank is a mating polygonal portion.
8. The combination according to 8. 22. A combination of a tool or tool holder with a shank and a chuck assembly, the shank having an annular groove and a drive structure,
The chuck assembly includes an outer end portion, an outer circumference, a central bore along a central axis, and three equally spaced axially extending jaw receiving slots open toward the central bore. A chuck body, a mounting means for mounting the chuck assembly on an outer end portion of a shaft of a drive mechanism, and three axially and radially movable bodies received in each of the axially extending slots. A jaw and moving means for moving the jaw against a shank of a tool or tool holder received in the central bore, the chuck body further comprising two of the axially extending slots. Having at least one inwardly extending passageway located within the chuck body between
The passage extends from the outer periphery of the chuck body to an opening that opens inward toward the central hole, the opening having a diameter less than the diameter of the passage, and the chuck assembly further comprises At least one ball or detent provided in the passage, spring bias means associated with the passage for resiliently biasing the ball or detent toward the central bore, and the chuck body. A drive structure provided in the central bore for mating with a mating drive structure on a shank of a tool or tool holder received in the central bore of the chuck assembly; The mating action of the mating drive structures may provide a rotational driving force to the tool or tool holder, and the central bore of the chuck body may be provided. Axial movement of the received set of tools or tool holder stops the ball or return in the annular groove in the shank,
Alternatively, it is regulated by fitting both of them with the shank of the tool or the tool holder. 23. The drive structure in the central bore includes a spline profile in the central bore for mating with a mating spline profile on the shank of the tool or tool holder. The combination of 22. 24. The drive structure in the central bore includes a polygon that mates with the polygon on the shank of the tool or tool holder.
The combination described. 25. An elongate rod-shaped, non-impact, non-impact drill type rotary tool, which is provided on a shank having a polygonal cross section except an inner end portion and an outer end portion of the shank. A non-impact, non-impact drilling rotary tool or means, and an annular groove in the shank having a width to receive a detent to prevent axial movement of the tool when received by the snap chuck assembly. And a spline structure on the inner end of the shank. 26. The rotary tool according to claim 25, wherein the polygonal cross section is a hexagonal cross section. 27. The rotary tool according to claim 25, wherein the annular groove is provided in a portion having a polygonal cross section. 28. The rotary tool according to claim 25, wherein the tool means is a drill bit, a screwdriver or a Phillips screwdriver. 29. The rotary tool according to claim 25, wherein an inner end portion of the shank having the spline structure has a diameter smaller than that of the shank. 30. The annular groove is wide enough to receive a detent to prevent axial movement of the tool when received in the snap chuck assembly. Item 25. The rotating tool according to Item 25. 31. A chuck assembly comprising: an outer end portion, an outer periphery, a central bore along a central axis, and an opening toward the central bore, the three axially spaced apart axially provided bodies. A chuck body having an extending jaw receiving slot, mounting means for mounting the chuck assembly on an outer end portion of a shaft of a drive mechanism, and three axial and radial members received in each of the axially extending slots. A jaw movable in a direction and a moving means for moving the jaw against a shank of a tool or tool holder received in the central bore, the chuck body further including a slot extending in the axial direction. At least one inwardly extending passageway located within the chuck body between two of
The passage extends from the outer periphery of the chuck body to an opening that opens inward toward the central hole, the opening having a diameter less than the diameter of the passage, and the chuck assembly further comprises: At least one detent provided in the passageway, spring biasing means for pressing the detent toward the central bore, and against the shaft or shank received in the central bore. Means for releasing the detent fit, and a nose collar mounted on the outer end portion of the chuck body for rotation, wherein the biasing means comprises a barrel of the nose collar. A tubular wall, the release means including a recess in the tubular wall configured and arranged to align with the passage including the at least one detent, Upon rotation of the nose collar, the detents in the passage can enter the recess away from the opening, and a drive structure is provided in the central bore, the chuck body's Mating with the mating drive structure on the shank of the tool or tool holder received in the central bore, the chuck assembly provides a rotational drive force to rotate the tool or tool holder by mating the mating structures together. And the detent received in the central bore of the chuck body for mating with the shank, or the detent for mating with a shank received in the central bore, or both. A chuck assembly, wherein axial movement of a shank of a tool or a tool holder is restricted. 32. The means for mounting the chuck body on the outer end portion of the shaft of the drive mechanism has a thread groove on the inner end portion of the central bore for threadingly engaging the threaded outer end portion of the drive shaft. 32. The chuck assembly of claim 31, wherein: 33. The chuck assembly of claim 31, wherein the outer end portion incorporates evenly spaced passages. 34. The central bore has a hexagonal cross-section in the passage region of the outer end portion of the chuck body, the central bore having the hexagonal cross-section mating with the shank of the tool or tool holder, 32. The chuck assembly of claim 31, including means for impeding rotation of the shank of the tool or tool holder. 35. The central bore mates with a splined feature on the shank of the tool or tool holder to provide means within the central bore for impeding rotation of the shank of the tool or tool holder relative to the chuck body. 32. The chuck assembly of claim 31, wherein: 36. The chuck assembly according to claim 31, wherein the nose collar has a fingertip receiving recess, and the nose collar is pinched to rotate about the axis of the central bore. 37. The chuck assembly of claim 31, which is associated with a tool or tool holder having a mating drive structure on the shank. 38. The shank of a tool or tool holder has an annular groove for receiving at least one detent to prevent axial movement of the tool or tool holder. Chuck assembly. 39. A combination of tools or tool holders having a polygonal drive structure on a shank for mating with the polygonal drive structure in a central bore. Chuck assembly. 40. The chuck of claim 31 in combination with a tool or tool holder having a spline drive structure on the shank for mating with the spline drive structure in the central bore. assembly. 41. A chuck assembly comprising: an outer end portion, an outer circumference, a central bore along a central axis, and an opening toward the central bore, the three axially spaced apart axially provided bodies. A chuck body having an extending jaw receiving slot, mounting means for mounting the chuck assembly on an outer end portion of a shaft of a drive mechanism, and three axial and radial members received in each of the axially extending slots. A jaw movable in a direction and a moving means for moving the jaw against a shank of a tool or tool holder received in the central bore, the chuck body further including a slot extending in the axial direction. At least one inwardly extending passageway located within the chuck body between two of
The passage extends from the outer periphery of the chuck body to an opening that opens inward toward the central bore, the opening having a diameter less than the diameter of the passage, and the chuck assembly further comprises: At least one detent provided in the passageway, biasing means for pressing the detent toward the central bore, and the return against a shaft or shank received in the central bore. Means for releasing the engagement of the stop; and a nose collar mounted on the outer end portion of the chuck body for axial movement with respect to the outer end portion of the chuck body. The means includes a first tubular wall of a tubular recess in the nose collar having the same diameter as the outer circumference of the outer end portion of the chuck body, the release means including the outer end portion. A second diameter greater than the diameter of the outer circumference of
An axial movement of the nose collar includes a tubular wall portion to position the second tubular wall portion in the region of the passage and to move the detent laterally outward from the opening of the passage. A drive structure residing in the central bore for mating with a mating drive structure on a shank of a tool or tool holder received in the central bore of the chuck body. The chuck assembly provides a rotational drive force that rotates the tool or tool holder by mating the mating structures together, such that the jaws engage the shank or the detents A shaft of a shank of a tool or tool holder received in the central bore of the chuck body for mating with a shank received in the central bore, or both. Chuck assembly is countercurrent moving characterized in that it is regulated. 42. The means for mounting the chuck body on the outer end portion of the shaft of the drive mechanism has a threaded groove on the inner end portion of the central bore for threadingly engaging the threaded outer end portion of the drive shaft. 42. The chuck assembly according to claim 41, wherein: 43. The chuck assembly of claim 41, wherein the outer end portion has evenly spaced passages. 44. The central bore has a hexagonal cross section in the passage region of the outer end portion of the chuck body and has means for mating with the shank of the tool to prevent rotation of the shank of the tool relative to the chuck body. 42. The chuck assembly of claim 41, wherein the chuck assembly is provided. 45. The central bore mates with a spline feature on the shank of the tool,
42. The chuck assembly of claim 41 having an inner spline portion that provides a means within the central bore for impeding rotation of the shank of the tool relative to the chuck body. 46. The chuck assembly of claim 41, wherein the nose collar has a fingertip receiving recess that is pinched to move the nose collar axially of the central bore. 47. The chuck assembly of claim 41 in combination with a tool or tool holder having a mating drive structure on the shank. 48. The shank of the tool or tool holder has an annular groove,
48. The chuck assembly of claim 47, which receives at least one detent and does not axially move the shank of the tool or tool holder. 49. The tool or tool holder of claim 41 in combination with a tool or tool holder having a polygonal drive structure on a shank to mate with the polygonal drive structure in the central bore. Chuck assembly. 50. The chuck assembly of claim 41 in combination with a tool or tool holder having a spline drive structure on the shank to mate with a spline drive structure in the central bore. . 51. A chuck having a jaw and a through bore including an outer bore for receiving a tool or tool holder and an inner bore for receiving and mounting an outer end portion of a motor shaft of a power tool. A tool drive system utilizing: an insert received in the inner bore, means for preventing rotation of the insert relative to the chuck; and the insert for mating with an inner end portion of a tool or tool holder. 52. The system of claim 51, including a drive structure provided to the tool and means other than the jaws for preventing axial movement of the tool or tool holder relative to the insert. 52. The tool or tool holder has an inner stem portion with a void, the insert has a protrusion received in the void, and the protrusion has a mating structure. 52. The system of claim 51, wherein rotational drive is provided to the tool or tool holder from the protrusions of the insert. 53. The insert has a void, the inner end portion of the stem portion of the tool or tool holder has a protrusion received in the void, and the protrusion has a mating structure. 52. The system of claim 51, wherein the insert provides rotational drive to the stem of the tool or tool holder. 54. The means for locking the rotation of the insert relative to the chuck comprises at least one keyway in the inner bore and at least one key or spline in the insert, which is received by the keyway. 52. The system according to claim 51. 55. The insert is cylindrical and has a threaded outer surface for threadingly engaging the threaded inner bore of the chuck, the threading between the insert and the inner bore being the threaded portion of the chuck. 52. The system of claim 51, which is a means of preventing rotation of the insert. 56. One of the inner end portions of the drive structure of the tool or tool holder and insert has a void and the other has a protrusion received in the void, the void and the protrusion being 6. A mating structure is provided to provide a rotational driving force between the insert and the inner end portion of the tool or tool holder.
The system according to 1. 57. The system of claim 56, wherein the means for preventing axial movement of the tool or tool holder relative to the insert includes magnet means associated with the protrusion or void. 58. Means to prevent axial movement of the tool or tool holder relative to the insert is a recess provided in the wall of the void and a mechanical or snap fit fit with the recess in the wall of the void. 57. The system of claim 56 including a spring detent mounted on the side of the protrusion. 59. The throughbore has a transition region between the outer and inner bores, the chuck has a leading end and a trailing end, and the drive structure of the insert is in or immediately above the transition region. And an insert for mounting the outer end portion of the motor shaft, the insert from the rear end to the inner end of the chuck before being retained in the inner end portion between the transition region and the outer end portion of the motor shaft. 52. The system of claim 51, wherein the drive structure of the inner end portion of the tool or tool holder is fully inserted into the throughbore to mate with the drive structure of the insert. 60. The inner bore has a thread and the insert has a threaded base, the base received in the inner bore and the outer end portion of the motor shaft also threaded. 60. The system of claim 59, wherein the motor shaft is threaded into the inner bore against the insert. 61. The inner bore has a keyway, the insert has a base, laterally extending keys are received by the keyway, the key and keyway rotating the insert with respect to the chuck. 60. The system of claim 59, which provides means for preventing movement. 62. The through bore of the chuck has a specially shaped intermediate bore above the inner bore and the insert has a mating shape that is received in a locked condition to prevent rotation of the intermediate bore relative to the through bore. The insert has an upper base with a void, and the inner end portion of the tool or tool holder has a downwardly extending projection that is received in the cavity. 6. The void and the protrusion have a mating shape to provide a rotational drive connection between the insert and an inner end portion of the tool or tool holder.
The system according to 1. 63. A tool drive system utilizing a chuck having a throughbore including an outer bore for receiving a tool or toolholder and an inner bore for receiving and mounting an outer end portion of a motor shaft of a power tool. An insert received in the inner bore, means for impeding rotation of the insert with respect to the chuck, and an insert provided to the insert for mating with an inner end portion of the tool or tool holder. A drive structure and magnet means associated with the tool or tool holder, and means for immobilizing the tool or tool holder axially relative to the insert. 64. A tool drive system utilizing a chuck having a throughbore including an outer bore for receiving a tool or tool holder and an inner bore for receiving and mounting an outer end portion of a motor shaft of a power tool. An insert received in the inner bore, means for impeding rotation of the insert with respect to the chuck, and an insert provided to the insert for mating with an inner end portion of the tool or tool holder. A drive structure and means for immobilizing the tool or tool holder axially with respect to the insert having an upwardly extending projection, the projection fitting in the cavity of the inner end portion of the tool or tool holder. A shape that mates with a shape, wherein the protrusion is a recess in the void to prevent axial movement of the tool or tool holder. A spring detent for mechanical and snap fit, the spring detent and the recess providing a means for axial movement of the tool or tool holder relative to the chuck. The system is characterized by: 65. A tool drive system utilizing a chuck having a through bore including an outer bore for receiving a tool or tool holder and an inner bore for receiving and mounting an outer end portion of a motor shaft of a power tool. An insert received in the inner bore, means for impeding rotation of the insert with respect to the chuck, and an insert provided to the insert for mating with an inner end portion of the tool or tool holder. A drive structure and means for preventing axial movement of the tool or tool holder with respect to the insert having an upwardly extending projection, the through bore having a specially shaped intermediate bore above the inner bore. A transition region is provided that includes the intermediate portion to prevent the insert from rotating relative to the throughbore. A projection having a mating shape to be locked to the insert, the insert having an upper base with a gap, and an inner end portion of the tool or tool holder having a downwardly extending projection. And the protrusion is received in the void, the void and the protrusion having a mating shape to provide a rotational drive connection between the insert and an inner end portion of the tool or tool holder. , The insert extends from the bottom of the gap to the protrusion, the outer end portion of the motor shaft is received in the inner bore of the chuck and has threads, and the tool drive system is received in the through bore, A system including a screw threaded into a threaded bore in an outer end portion of the motor shaft. 66. A chuck assembly having a chuck body including an outer end portion, an outer periphery, and a central bore, the central bore extending through the chuck body along a central axis. , An outer end portion, an intermediate portion and an inner portion, the chuck body further comprising three equidistant axially extending jaw receiving slots open toward the outer portion of the central bore. The chuck assembly further includes
Mounting means provided on the inner end portion of the central bore for mounting the chuck assembly on the outer end portion of the shaft of the drive mechanism and the three axial and radial directions received in each of the axial slots. A movable jaw, a moving means for moving the jaw relative to a shank of a tool or tool holder received in the central bore, and a tool or tool holder received in the outer portion of the central bore of the chuck body. And a polygonal drive structure provided on an outer portion of the central bore for mating with a polygonal drive structure on a shank, such as a chuck assembly, the chuck assembly including the jaws of the polygonal drive structure. And a chuck for providing a rotational driving force to the tool or the tool holder by fitting the shank of the tool or the tool holder. Assembly.