JPH0661406U - Chuck device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a chuck device for a tool that does not require the use of an auxiliary tool for mounting. [Structure] A plurality of claw grooves 43 obliquely intersecting an insertion hole 41 are formed to house a claw 6, and a fixing ring 7 is rotated to move the claw 6 via a chuck collar 5 to move a tool head. Hold or release. A pawl 75 is pivotally provided on the peripheral wall of the fixing ring 7, and the additional teeth 451 are provided on the main body 4 in correspondence therewith.
And the chuck shell 8 is fitted around the periphery of the claw, and a notch portion 811 is provided on the inner surface of the front end of the chuck shell 8 so that the pawl 75
Place By rotating the chuck shell 8, the side wall of the notch 811 abuts and pushes the pawl pawl 75 to engage the follower tooth 451 and tightly clamp the tool head via the chuck collar 5 and the pawl 6. Add a detent effect.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chuck device, and more particularly, to a chuck device that has a detent function and does not require any other auxiliary tool when attaching or detaching.

[0002]

[Prior art]

 The chuck device is a device for grasping and fixing a tool head such as a milling cutter or a drill, and it is often necessary to change the fixed tool head according to different machining of a workpiece. Therefore, in use, it is required that the tool head be easily held and easily replaced.

FIG. 7 is an assembly cross-sectional view of an example of a conventional drill chuck device. An axial insertion hole 111 for mounting a tool is mainly provided at the center of the front end of a cylindrical chuck body 11. And a key hole 112 is formed on the outer peripheral wall of the main body 11 for the chuck key so as to be orthogonal to the axial direction, and a ring-shaped groove 113 is provided around the outer peripheral surface of the main body 11 so as to rotate freely. The collar-shaped chuck collar 13 is loosely fitted, the taper-shaped inner screw 121 is formed on the inner peripheral surface of the chuck collar 12, and the ring-shaped chuck gear 122 is provided on the tip end surface of the chuck collar 12. On the inner peripheral surface of the insertion hole 111 of the main body 11, three oblique claw grooves 114 corresponding to each other at the corresponding intervals are opened, and part of the front ends of these claw grooves 114 is intersected with the bottom surface of the ring-shaped concave groove 113. Let In addition, the bottom end of the claw groove 114 is opened to communicate with the insertion hole 111, and the claw 13 is slidably installed in each claw groove 114, and at the same time, the threaded portion 131 is formed in the claw 13. It is screwed into an inner screw 121 on the inner peripheral surface of the chuck collar 12 provided in the ring-shaped groove 113, and the grip portion 132 provided on the pawl 13 is slid into and out of the insertion hole 111. Further, a fixing ring 14 serving as a chuck shell is attached to the outer side of the chuck collar 12, and the chuck collar 12 is rotated by appropriately rotating the fixing ring 14, and the claw 13 is pushed from the claw groove 114 by the screw driving. It should be pushed out into the insertion hole 111.

FIG. 8 is a view showing a usage state of the above-mentioned conventional chuck device. First, the rear end of the tool head 2 or its shank is inserted into the insertion hole 111 of the chuck device main body 11. After that, hold one end of the tool head 2 with one hand, and insert the shaft end 31 of the chuck key 3 into the key hole 112 of the main body 11 with the other hand to move the gear portion 32 of the chuck key 3 The chuck collar 122 is engaged with the chuck gear 122, and the chuck key 3 is rotated to rotate the chuck collar 12 in an interlocking manner to advance the screw feed between the inner screw 121 and the screw portion 131 of the pawl 13. Thus, the pawl 13 is pushed out into the insertion hole 111 and the tool 2 is gradually clamped and held.

On the other hand, when the chuck key 3 is rotated in the opposite direction, the chuck collar 12 is interlocked and rotated, and the pawl 13 engaged with the inner screw 121 moves outward to hold the tool head 2. loosen.

The conventional chuck device of this type can move the pawl 13 along the taper body of the chuck device by the chuck key 3 to firmly or firmly hold or release the tool head 2. However, there are still the following problems in use.

(1) After grasping the tool head, it can be easily loosened because there is no locking means. Generally, the chucking device is subject to vibration during use according to the machine to which it is attached, and the current chucking device only has a slight gripping of the pawl 13 with the chuck collar 12, and there is no associated means for preventing loosening. During use, if the chuck device vibrates along with the machine, it gradually loosens, and the pawl 13 that originally clamped the tool head 2 gradually moves backward and its clamping force weakens, which is a design locking means. The chipping causes looseness and the clamping force decreases.

(2) A chuck key is necessary to tightly clamp the tool head, which is inconvenient. As described above, since the conventional chuck device has no locking means after holding the tool head, the chuck collar 12 and the pawl 13 are easily loosened by vibration of the machine during use. In order to solve this problem, the conventional chuck device firmly clamps the tool head by the chuck key 3, and the use of the chuck key compensates for the artificial lack of rotational force, and the tool head is used for the maximum purpose. When mounting, the chuck collar 12 is screwed with a strong force so that it cannot rotate, and the chuck collar 12 is locked by frictional force. However, it cannot be said that using the chucky 3 is convenient. Moreover, since the chuck key 3 is quite small, it sometimes mixes with other tools and materials at the time when it is most necessary, and the work is temporarily stopped.

[0009]

[Problems to be solved by the device]

 In view of the above problems of the conventional chuck device, an object of the present invention is to provide a chuck device that easily holds a tool head and does not need to use an auxiliary tool such as a chuck key when mounting. To do.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an insertion hole for inserting and holding a tool head along the axis of the main body, a ring-shaped groove for loosely fitting a chuck collar on an outer peripheral portion, and the insertion hole. To form a plurality of chuck groove holes, the front end portion of which intersects with the ring-shaped concave groove, each claw groove hole is internally provided with a pawl, and a fixed ring is provided around the chuck collar. In a chuck device configured to rotate the fixing ring to move the pawl through the chuck collar to clamp or release the tool head. A pawl is pivoted, and a saw tooth-shaped additional tooth corresponding to the pawl is circumferentially provided on the main body to form a locking step, and a chuck shell is provided around the main body and the fixing ring. When fitted, the chuck A notch is provided on the inner surface of the tip of the shell, and the pawl pawl is placed therein. By rotating the chuck shell, the side wall of the notch abuts and pushes the pawl pawl to engage the above-mentioned additional teeth. Are combined to provide a detent effect to the function of tightly clamping the tool head via the chuck collar and pawl.

Then, the pawl is pivotally attached to a pivotal protrusion provided on the peripheral wall of the fixed ring, and is formed so as to be pressed inward from one side by a spring. -Shaped concave groove is formed by providing a sawtooth shape on the outer peripheral surface of an engaging ring provided in front of the groove, and when the chuck shell is rotated, the notch side wall abuts and pushes the pawl pawl. To engage the additional tooth to generate a detent effect, or to provide a convex edge on the peripheral surface of the main body to control the moving process of the pawl, or the pawl The engaging end is provided at one end corresponding to the additional tooth and the abutting part is formed at the other end, and the pawl is placed in the notch of the chuck shell to move the chuck shell in the hour hand direction. When rotated, the locking end abuts and pushes against the notch, engages with the additional tooth, and returns. It is even more preferable that when the chuck shell is rotated and the chuck shell rotates in the counterclockwise direction, the contact portion is pushed by the notch portion to release the detent action.

[0012]

[Function of the device]

 Since the present invention is configured as described above, when used, the user holds one end extruded from the chuck shell of the main body with one hand, and the other hand holds the chuck shell around the hour hand to the front end of the main body. When the inserted tool head is rotated until it is firmly clamped, the inner fixing ring also follows and moves in rotation, and at the same time, the chuck collar on the bottom surface of the fixing ring also rotates and moves, and the plurality of The pawl is prevented from moving toward the insertion hole, and the pawl is pressed to firmly hold the tool head mounted in the insertion hole.

On the other hand, the side wall of the notch portion on the inner surface of the front end of the chuck shell comes into contact with the pawl pawl of the fixing ring and pushes and rotates the pawl pawl. It engages with the additional teeth provided and has a detent effect, which clamps the tool head firmly and does not loosen due to vibration. When releasing the clamped tool head, rotating the chuck shell in the counterclockwise direction causes the side wall of the notch in the chuck shell to abut against the pawl and push it in the opposite direction. The engagement with the additional tooth is disengaged, and the opposite rotation of the chuck collar becomes smooth, so that the tight clamping of the pawl to the tool head can be released.

Then, the pawl is pivotally attached to a pivotal protrusion provided on the peripheral wall of the fixed ring and is formed so as to be pressed inward toward one side with respect to the ridge, and the additional tooth is formed into a ring shape of the main body. Concave groove Formed by providing a sawtooth shape on the outer peripheral surface of the engagement ring that is provided around the front side, and when the chuck shell is rotated, the side wall of the cutout portion abuts and pushes the pawl pawl. To engage the above-mentioned additional teeth to produce a detent effect, or to provide a convex edge on the peripheral surface of the main body to control the moving process of the pawl, or to A locking end is provided at one end corresponding to the additional tooth and an abutting part is formed at the other end, and the pawl is placed in the notch of the chuck shell to rotate the chuck shell in the hour hand direction. Then, the locking end is pressed against the cutout portion and is engaged with the additional tooth to produce a detent action. When the chuck shell rotates in the counterclockwise direction, the contact portion is pressed against the notch to release the detent action, so that the clamping action and detent action on the tool head are more reliable. become.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments with reference to the drawings.

[0016]

【Example】

 As shown in FIG. 1, the present invention includes a main body 4, a chuck collar 5, three pawls 6, a fixing ring 7, and a chuck shell 8. Among them, the body 4 has, as in the conventional one, an axial insertion hole 41, a ring-shaped concave groove 42 around the circumference, and three obliquely facing claw grooves 43 corresponding to equal intervals. It is provided in the place.

The insertion hole 41 is used for inserting and fixing the tool head, and the ring-shaped groove 42 is provided with the chuck collar 5 and the claws 6 are respectively provided in the claw grooves 43. In addition, a convex edge 44 is provided on the outer peripheral surface of the main body 4 in order to prevent an outward movement process of the pawl 6 installed therein, and at the same time, a fixing ring 7 is fixed around the chuck collar 5.

This structure is substantially similar to the conventional chuck layer, and the improvement of the present invention is that the pivot ring 7 having a pin hole 721 and a pin 73 is provided on the outer peripheral wall of the opening end 71 of the fixing ring 7. 2, a pawl pawl 75 is pivotally attached to the bottom end of the pin 73 via a pawl 74, and a spring 76 is attached between the pivotal projection 72 and pawl pawl 75. The locking end 751 of the pawl 75 is constantly pressed in one direction, and the abutment portion 752 is further provided at the other end of the ratchet pawl 75.

Further, an engaging ring 45 is circumferentially provided in front of the ring-shaped groove 42 of the main body 4, and saw teeth 451 are formed on the peripheral surface of the engaging ring 45 in a sawtooth shape. Each additional tooth 451 is provided with a tapered sliding surface 452, a check surface 453 is further provided between both sliding surfaces 452, and the chuck shell 8 is provided around the main body 4 and the fixing ring 7. The chuck shell 8 is externally fitted to the front and rear covers 81 and 82 by screwing, and a notch 811 is provided on the inner surface of the front end of the front cover 81 so that the pawl 75 can be placed. Are formed so that appropriate gaps are left on both sides from the pawl pawl 75 to the notch 811.

As is apparent from FIGS. 2 and 3, when assembling the device of the present invention, the pawls 6 are respectively installed in the pawl grooves 43 of the main body 4, and the chuck collar 5 is attached to the ring of the main body 4. The chuck collar 5 is circumferentially attached to the concave groove 42, and the fixing ring 7 is attached to the chuck collar 5 so that the chuck collar 5 is sandwiched and firmly held. Then, the spring 76 and the pawl pawl 75 are pivotally mounted on the pivoting protrusion 72 of the fixing ring 7 by a pin 73, and one end of the spring 76 is abutted and pressed to the outside of the pawl 75, and thereafter. The front and rear covers 81 and 82 are externally screwed to the main body 4 and the fixing ring 7, and the pawls 75 protruding from the fixing ring 7 are made to correspond to the notches 811 of the front cover 81.

Next, as shown in FIGS. 2 and 4, when the present invention is used, one hand grips one end of the main body 4 extruded from one end of the chuck shell 8 and the other hand grasps the chuck shell around the hour hand. Rotate 8. When the chuck shell 8 rotates, the left side wall of the inside notch portion 811 (in the example of FIG. 4) abuts the outside of the pawl pawl 75, and the pawl pawl 75 locking end 751 comes into contact with the additional side. It slides along the sliding surface 452 of the tooth 451 and is fixed on the adjoining additional tooth 451 ′ around the hour hand, at which time the fixing ring 7 provided with the pawl 75 also moves accordingly, and the chuck collar 5 Is rotated in an interlocking manner to prevent the insertion hole 41 of the pawl 6 from moving in the direction, and firmly hold the tool head mounted in the insertion hole 41. Then, when the chuck shell 8 stops rotating, the engaging end 751 of the pawl pawl 75 abuts on the non-return surface 453 of any one of the additional teeth 451 of the main body 4 to be fixed.

Subsequently, as shown in FIGS. 2 and 5, when releasing the clamped tool head according to the present invention, the chuck shell 8 is rotated in the counterclockwise hand direction to move the inside of the chuck shell 8. The right wall of the cutout portion 811 (in FIG. 5 as an example) abuts the abutment portion 752 of the pawl 75 and overcomes the elasticity of the spring 76 to swing about the pin 73, The engaging end 751 is gradually released from the abutting engagement with the additional tooth 451 so that the opposite rotation of the chuck collar 5 can be smoothly performed to facilitate the releasing and taking out of the tool head.

In order to achieve the above object, the present invention forms a ring-shaped engaging portion 912 in a protruding portion of the main body 91 behind the ring-shaped groove 911 as shown in FIG. A swingable pawl pawl 94 is pivotally mounted on a fixing ring 93 around the pawl 92 so that a locking end 941 at the end of the pawl pawl 94 can be fitted into the additional tooth 913 of the ring-shaped engaging portion 912. None, in addition, the chuck shell 95 is externally mounted on the main body 91, and a notch 951 is formed on the inner surface of the front end of the chuck shell 95 corresponding to the pawl 94. With such an assembly structure, the chuck collar 92 of the main body 91 can be provided with a function of tightening and holding like the above-mentioned embodiment.

[0024]

[Effect of device]

 The present invention configured as described above has the following effects.

(A) The tool head can be easily fixed and fixed. In the present invention, when the tool head is mounted, the fixing ring that rotates and rotates the chuck collar has already fixed and fixed the pawls to the additional teeth of the main body, so even if the machine to which the present invention is mounted vibrates. The pawl cannot be easily disengaged from the engagement with the additional tooth, and therefore, the tool head can be clamped firmly with a stable detent effect to ensure the safety in use of the tool head. Can be secured.

(B) The operation is simple and there is no need to use an auxiliary tool. When the tool head is mounted on the present invention, and the user rotates the chuck shell once every time, the fixing ring interlocks with the chuck color, and when the user stops the rotation, the fixing ring has its pawl pawl. It cannot be inverted because it has a detent effect with the additional teeth of the body, thus ensuring that the chuck collar holds the pawl tightly. That is, in terms of operation, if the user intermittently rotates the chuck shell, the chuck collar can be gradually clamped tightly, and it is not necessary to use an auxiliary tool, and the operation is simple and convenient. Naturally, there is no chance of stopping the work because it is not possible to temporarily find auxiliary equipment as in the past.

[0027]

[Brief description of drawings]

[0028]

[Figure 1]

FIG. 3 is an exploded view of an embodiment of the present invention.

[0030]

[Fig. 2]

FIG. 3 is an assembled sectional view of the embodiment.

[0032]

[Figure 3]

FIG. 3 is a sectional view taken along line I-I in FIG.

[0034]

[Figure 4]

It is a partial enlarged operation explanatory view of the embodiment.

[0036]

[Figure 5]

FIG. 6 is a partial enlarged operation explanatory view of the embodiment.

[0038]

[Figure 6]

FIG. 3 is a perspective view of another embodiment of the present invention.

[0040]

[Figure 7]

FIG. 11 is an assembled sectional view of a conventional chuck device.

[0042]

[Figure 8]

It is an explanatory view of a usage state of the conventional chuck device.

[0044]

[Explanation of symbols]

4: body 41: insertion hole 42: ring-shaped concave groove 43: claw groove 44: convex edge 451: additional tooth 453: check surface

6: Pawl 72: Pivotally attached protrusion 75: Pawl pawl 752: Contact portion 76: Spring

8: Chuck shell 811: Notch 45: Engagement ring 452: Sliding surface 5: Chuck collar 7: Fixing ring 73; Pin 751: Locking end

Claims (4)

[Scope of utility model registration request] 1. A ring shape in which a body (4) is loosely fitted with an insertion hole (41) for inserting and gripping a tool head along the axis of the body (4) and a chuck collar (5) of an outer cylinder part. Groove (4
2) and a plurality of chuck groove holes (4) communicating with the insertion hole (41) and having a front end portion intersecting with the ring-shaped groove (42).
3) is formed, a claw (6) is provided in each chuck groove hole (43), and a fixing ring (7) is provided around the chuck collar (5) to form the fixing ring (7). In a chucking device which is rotated to move a pawl (6) through the chuck collar (5) so as to clamp or release a tool head; the fixing ring (7) projects from the tip to the peripheral wall. Pawl in position (75)
And a saw tooth-shaped additional tooth (451) corresponding to the pawl (75) is provided around the body (4) to form a locking means, and the body (4) and the Retaining ring (7)
Rotate the chuck shell (8) by fitting the chuck shell (8) around it and providing a notch (811) on the inner surface of the tip of the chuck shell (8) to place the pawl (75). By doing so, the side wall of the cutout portion (811) abuts and pushes the pawl (75) to push the additional tooth (45).
A chuck device which is engaged with 1) to impart a detent action to the function of tightly clamping the tool head through the chuck collar (5) and the pawl (6). 2. The pawl (75) is pivotally attached to a pivoting protrusion (72) provided on the peripheral wall of the fixing ring (7) so that the pawl (75) is pressed inward by a spring (76). Then, the additional tooth (451) is connected to the ring-shaped groove (4) of the body (4).
2) When the chuck shell (8) is rotated by forming a sawtooth shape on the outer peripheral surface of the engaging ring (45) provided around the front, the side wall of the notch (811) is the claw. 2. The chuck device according to claim 1, wherein the pawl (75) is pushed by contact to be engaged with the additional tooth (451) to generate a detent action. 3. The chuck device according to claim 1, wherein a convex edge (44) is provided on a peripheral surface of the main body (4) to control a moving process of the pawl (6). 4. The additional tooth (45) of the pawl (75).
1) is provided with a locking end (751) at one end, and an abutment portion (752) is formed at the other end, and the pawl (75) is in the notch portion (811) of the chuck shell (8). When the chuck shell (8) is placed, and the chuck shell (8) is rotated in the hour hand direction, the locking end (751) is abutted and pushed by the notch (811) to engage with the additional tooth (451). When the chuck shell (8) rotates in the counterclockwise direction, the contact portion (752) is pushed by the notch portion (811) to release the detent action. The chuck device according to claim 1.