KR850003040Y1 - Tool chuck - Google Patents

Abstract

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Description

Tool change chuck

1 is a cross-sectional view showing a state in which an exchange shaft is attached to an exchange chuck of a tool embodying the present invention.

2 is a perspective view of a part showing the coupling state between the normal part of the exchange chuck and the exchange shaft;

3 is a cross-sectional view of a spherical part of the exchange chuck of FIG.

4 is a cross-sectional view showing a state in which the exchange shaft is removed from the exchange chuck.

5 and 6 are cross-sectional views showing another example of the exchange chuck.

* Explanation of symbols for main parts of the drawings

1: Spindle 2: Normal part

3: mounting hole 10: old

11: movable sleeve 17: pushing member

18: cover 19: coil spring

21: notch 22: gage end

23: exchange shaft 24: insertion shaft

This paper relates to the exchange chuck of tools for attaching and detaching drills, taps, etc. to the spindle.The purpose of this is not only to reliably exchange drills, taps, etc. with the exchange shaft with one touch, An object of the present invention is to provide a replacement chuck for a tool such as a drill, which allows the position control after the pushing member to be protruded without any special regulating device therefor.

Next, an embodiment in which the present invention is embodied will be described with reference to FIGS. 1 to 4, in which the spindle 1 is provided with a normal portion 2, and the inside thereof is an attachment hole 3. In this attachment hole 3, the insertion shaft part 24 of the exchange shaft 23 demonstrated below is inserted and fixed. In the inner circumference of the attachment hole 3, a relief groove 4 is formed, and a part thereof is provided with an air hole 5 that opens to the outer circumference of the ordinary column 2. In addition, a smaller diameter spring hole 6 is provided on the inner bottom surface of the attachment hole 3.

The bulging part 7 is formed in the periphery of the front end (right end) of the normal part 2. Moreover, as shown in FIG. 2, a pair of anti-rotation convex part 8 is formed in the front end of the normal part 2. As shown in FIG.

A plurality of holes 9 penetrating the normal portion 2 in and out of the center of the normal portion 2 in the longitudinal direction are formed, and each hole 9 allows the sphere 10 to be moved in and outward. It is inserted.

A movable sleeve 11 is attached to the normal portion 2 so as to be able to slide in the front-rear direction thereof, and a mounting recess 12 is formed on the inner circumference of the first half of the sleeve 11. have.

In this recessed portion 12, the bulging portion 7 at the front end of the ordinary portion 2 is inserted. A coil spring 13 for always pushing the movable sleeve 11 backward is provided between the inner end of the mounting recess 12 and the inflated portion 7 of the normal portion 2.

An insertion groove 14 is formed in the rear inner circumference of the movable sleeve 11 at a position corresponding to the plurality of spheres 10 on the normal portion 2. The insertion groove 14 is a retracted portion 15 for allowing the plurality of spheres 10 to retract outward from the attachment hole 3 of the ordinary portion 2 and the continuous grooves forward thereof. An inclined portion 16 for pushing the 10 into the attachment hole 3 is provided.

The inclined portion 16 is inclined so that the diameter becomes smaller as the front portion thereof. Therefore, in the state of FIG. 1, the sphere 10 is slightly pushed into the attachment hole 3 by the inclined part 16 of the insertion groove 14. As shown in FIG.

As shown in FIG. 4, when the movable sleeve 11 slides forward while the elastic spring of the coil spring 13 overcomes the elastic force of the coil spring 13, the receding portion 15 of the insertion groove 14 corresponds to the sphere 10. These spheres 10 retreat from inside the attachment hole 3. In this case, the sphere 10 can be fully retracted from the attachment hole 3 in view of its dimension, but the inner edge of the sphere 10 is actually the attachment hole 3 unless it is pressurized from the inner side of the attachment hole 3. It will be slightly protruding into it.

A stop ring 1a is fitted on the spindle 1 at the rear of the movable sleeve 11. This stop ring 1a is for regulating the movement of the movable sleeve 11 to the rear.

In the recess of the attachment hole 3 of the said normal part 2, the pushing member 17 which carried out the cylindrical cylindrical shape is provided so that it can move back and forth. At the time of movement of this pushing member 17, air flows in and out of the attachment hole 3 through the air hole 5 of the rear end of the normal part 2. As shown in FIG. A coil spring 19 for pushing the pushing member 17 forward is provided between the cover portion 18 of the pushing member 17 and the bottom face of the spring hole 6. The screw hole 20 penetrates through the center of the cover part 18 of the pushing member 17, and the notch 21 is formed in the outer periphery of the front end of the pushing member 17, and the locking end part is formed at the rear end thereof.部 is formed.

In the state of FIG. 1, when the member 10 retreats outward and pushes the member 17 forward by the coil spring 19 in the attachment hole 3, it pushes out as shown in FIG. The member 17 stops moving where the locking end portion 22 of its righteousness is locked to the inner edge of the sphere 10. In this case, since the coil spring 19 extends almost full length in the stop position, the pushing member 17 pushes the sphere 10 strongly outward, so that the sphere 10 does not protrude forward.

In the attachment hole 3 of the normal part 2 of the said spindle 1, the exchange shaft 23 is attachable so that replacement is possible. The exchange shaft 23 is composed of an insertion shaft portion 24 and an attachment cylinder portion 25 formed integrally with the front end thereof, and the insertion shaft portion 24 is inserted into the attachment hole 3.

At the base end of the insertion shaft portion 24, a pair of anti-rotation recesses for inserting the anti-rotation convex portion 8 at the front end of the ordinary portion 2 are formed. When the tin section 8 is inserted into the recess 26, the exchange shaft 23 can rotate integrally with the spindle 1. An outflow prevention groove 27 is formed on the outer circumference of the insertion shaft portion 24 of the exchange shaft 23, and an inclined surface that engages the plurality of spheres 10 on the rear side of the outflow prevention groove 27 ( 28) is formed.

Since the sphere 10 is locked to the inclined surface 28 of the extraction preventing groove 27, the exchange shaft 23 is prevented from escaping from the spindle 1. At the front end of the exchange shaft 23, a collet chuck 29 for mounting a drill, a tab, or the like is attached.

In the case of using the exchange chuck, as shown in FIG. 4, when the movable sleeve 11 slides forward, the plurality of spheres 10 are retracted from the insertion groove 14 of the movable sleeve 11. Retreat to 15). For this reason, the insertion shaft portion 24 of the exchange shaft 23 is pushed forward by the pushing member 17 as indicated by the dashed-dotted line in FIG.

After being pushed out, the exchange shaft 23 is simply pulled out by pulling it out of the spindle 1 by hand. After extraction, the movable sleeve 11 returns to its original position by the action of the coil spring 13.

When attaching another exchange shaft to the spindle 1, as shown in FIG. 4, the insertion shaft portion 24 of the exchange shaft 23 is moved to the spindle 1 while the movable sleeve 11 is slid forward. It inserts into the normal part 2 of from the front.

In this way, the pushing member 17 inside the normal part 2 is pushed by the exchange shaft 23 and pushed back inward while overcoming the elastic force of the coil spring 19.

Then, the anti-rotation convex portion 8 in front of the normal portion 2 is inserted into the anti-rotation recess 26 on the exchange shaft 23, and at the same time, the extraction preventing groove 27 at the rear end of the exchange shaft 23 is provided in the normal portion 2. Corresponds to sphere 10 above. Therefore, in this state, if the bias to the front of the movable sleeve 11 is released, the copper sleeve 11 is returned to the rear side, and the sphere 10 is turned off by the inclined portion 16 of its insertion groove 14. It is pushed into the attachment hole 3 of (2).

Therefore, the sphere 10 is locked to the inclined surface 28 of the extraction preventing groove 27 so that the exchange shaft 23 is fixed to the spindle 1.

In this state, the inner end of the insertion shaft portion 24 is in contact with the front face of the pushing member 17, and the rear end of the pushing member 17 is in contact with the inner end of the attachment hole 3.

When the air hole 5 of the normal part 2 is blocked or between the outer circumferential surface of the pushing member 17 and the inner circumferential surface of the mounting hole 3, dust, dirt, etc. enter and push the member 17 smoothly back and forth. If not, this pushing member 17 is pulled out of the normal part 2, and the outer periphery, the attachment hole 3, or the inside of the air hole 5 are cleaned.

When removing the pushing member 17, a screw rod with a screw inscribed at the distal end into the normal part 2 in the state in which the exchange shaft 23 is pulled out from the spindle 1 is inserted from the front to push the screw part 17 Screw holes 20). Thus, the member 17 pushed together with the screw rod is pulled out from the normal portion 2.

In this way, when the pushing out member 17 is pulled out, the locking end 22 is lightly latched to the ball 10, so that the pushing member 17 is strongly pulled out so that the ball 10 is completely moved outward from the attachment hole 3. Evade.

In addition, when the pushing out member 17 is pushed out from the attachment hole 3, the locking of the ball 10 by the pushing member 17 and the locking of the movable sleeve 11 by the copper ball 10 are eliminated. The movable movable sleeve 11 is slidably moved backward by the elasticity of the coil spring 13.

This slide operation is stopped by the stop ring 1a behind the movable sleeve 11.

In the present invention, the cutout portion 21 is provided on the outer periphery of the front end portion of the pushing member 17 as described above, and the locking end portion 22 is provided at the rear end thereof. Even when the member 17 springs forward, the pushing member 17 is engaged with the locking end 22 on the member 17 pushed by the plurality of spheres 10 for locking the exchange shaft 23. Restrain restraining from moving.

Therefore, there is an effect that it is not necessary to separately install the regulating device for regulating the pushing member 17.

5 shows another example of the exchange chuck of the present invention. In this embodiment, an annular spring sheet 30 is provided in place of the expansion portion 7 at the front end of the normal portion 2 in the embodiment.

The spring sheet 30 is held on the normal portion 2 by the snap ring 31. In this embodiment, the bulging portion 32 is formed in place of the stop ring 1a at the rear end of the normal portion 2.

In addition, in the exchange chuck 23 of FIG. 6, a spring ring-compatible snap ring 31 is provided at the outer circumferential front end of the ordinary part 2, and the insertion groove 14 in the movable sleeve 11 extends backward to extend the copper sleeve. It reaches the end of (11).

And the expansion part 32 on the spindle 1 extends long forward, and is inserted in the rear part of the insertion groove 14 of the movable sleeve 11.

In addition, in this embodiment, instead of the anti-rotation convex portion 8 of the tip of the normal portion 2 and the anti-rotation recess 26 of the insertion shaft portion 24 in the embodiment of FIGS. Hexagon-shaped anti-rotation hole 33 is formed at the front end of the) and at the proximal end of the insertion shaft portion 24, a hex nut-shaped anti-rotation protrusion is inserted into the anti-rotation hole 33 so as not to rotate. 34) is formed.

And the front end surface of the normal part 2 is in contact with the rear end surface of the attachment cylinder part 25, and this contact transmits the propulsion force to the left direction which hangs on the exchange shaft 23 in the case of drilling. Therefore, in this embodiment, the rear end of the pushing member 17 is not in contact with the inner end of the attachment hole 3.

As described above, the high pressure exhibits the effect of reliably regulating the positional control after the protruding member of pushing the exchange shaft forward when the exchange shaft is replaced without a special device therefor.

Claims (5)

An attachment hole 3 is formed in the ordinary portion 2 of the spindle 1 so that the insertion shaft portion 24 of the exchange shaft 23 for attaching a tool such as a drill can be inserted into and fixed interchangeably. 2) The movable sleeve 11 is put on the movable sleeve 11 so as to be movable in the front-rear direction, and on the normal part 2, it is recessed into the attachment hole by the movement of the movable sleeve 11 and into the attachment hole 3. In the replacement chuck of the tool, which is provided with a plurality of spheres 10 which are engaged with the large end of the exchange shaft 23 and prevent their falling out when protruding, the misalignment of the attachment hole 3 In the part, a force is always applied to the front by the coil spring 19, and when the exchange shaft 23 is removed, a member for storing the member is pushed forward and the pushing member 17 is opened in a cylindrical shape. Formed between the cover portion 17 and the bottom of the attachment hole 3. The member 17 which forms the notch 21 in the outer periphery of the front-end part of the member 17 which mounts and pushes out the pre-coil spring 19, and simultaneously pushes and couples with the inner edge of the said plurality of spheres 10 at its rear end. ) An engaging chuck for tools such as a drill, characterized in that a locking end portion 22 is formed to prevent the tip from slipping forward. 2. A chuck for replacing a tool such as a drill according to claim 1, wherein a screw hole (20) for screwing a screw rod is formed in the cover portion (18) of the pushing member (17). The rear end of the ordinary part 2 is provided with an air hole for allowing air to enter and exit the attachment hole 3 when the pushing member 17 moves back and forth. Exchange chucks for tools such as drills. 2. The ordinary portion (2) according to claim 1, wherein the insertion shaft portion (24) of the exchange shaft (23) is engaged with each other while being inserted into the ordinary portion (2) so that the exchange shaft (23) can rotate integrally with the spindle. A pair of anti-rotation recesses 8 are formed at the front end of the pair, and at the same time, a pair of anti-rotation recesses 26 for inserting the anti-rotation recesses 8 at the base end of the insertion shaft portion 26 are provided. ) Exchange chuck for tools such as drills, characterized in that is formed. The method according to claim 1, wherein the insertion shaft portion (24) of the exchange shaft (23) is engaged with each other in the state of being inserted into the ordinary portion (2) so that the exchange shaft (23) can rotate integrally with the spindle (1). The hexagonal nut-shaped anti-rotation hole 33 is formed at the front end of the ordinary portion 2, and at the same time, the hexagonal nut-shaped anti-rotation is inserted into the anti-rotation hole 33 at the proximal end of the insertion shaft 24. An exchange chuck for tools such as drills, characterized in that the projections 34 are formed.