CN210848380U

CN210848380U - Three-jaw chuck

Info

Publication number: CN210848380U
Application number: CN201921638153.3U
Authority: CN
Inventors: 叶利华
Original assignee: Hangzhou Desai Machinery Co ltd
Current assignee: Hangzhou Desai Machinery Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-26
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a three-jaw chuck, which comprises a chuck body, wherein a through hole is arranged at the center of the chuck body, a track ring is arranged in the chuck body, a spiral track is arranged on the track ring, three chutes are evenly arranged on the chuck body, claws are arranged in the chutes, one ends of the claws, which are far away from the chuck body, are connected with extension fixture blocks, the extension fixture blocks are in a circular arc shape, the extension fixture blocks are arranged away from the through holes, one sides of the extension fixture blocks, which are far away from the through holes, are provided with fixing clamping strips, one sides of the claws, which are close to the track ring, are provided with tooth seats, track teeth are fixed under the tooth seats, the track teeth are matched with the track ring, an annular rack is arranged under the track ring, a rotating hole is arranged between the two chutes on the chuck body, bevel gears are, the extension blocks on the clamping jaws can clamp workpieces with larger diameters and can also be turned to clamp thinner workpieces.

Description

Three-jaw chuck

Technical Field

The utility model relates to the technical field of machining, in particular to three-jaw chuck.

Background

In the machining process, the workpiece needs to be cut, polished and the like, in the machining process, the workpiece needs to be kept in a stable state, so that the precision of the workpiece after machining is ensured, in the prior art, the workpiece is generally fixed by adopting a clamp, when the workpiece is machined by a revolving body, the workpiece is generally machined by adopting a lathe, when the lathe is machined, the workpiece is generally fixed by adopting a self-centering three-jaw chuck, the self-centering three-jaw chuck is convenient to zero when machining, the tool is convenient to correct and grasp the tool cutting amount, but the mobility of the existing three-jaw chuck is small, the weight of the three-jaw chuck with a large model is large, the three-jaw chuck with the large model is not small, and the service life of the lathe is greatly shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-jaw chuck can just can the great work piece of centre gripping diameter without changing the chuck.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a three-jaw chuck, includes the disk body, the through-hole has been seted up at disk body center, be provided with the track ring in the disk body, be provided with the spiral track on the track ring, three spouts have evenly been seted up on the disk body, be provided with the jack catch in the spout, the one end that the through-hole was kept away from to the jack catch is connected with the extension fixture block, it is convex to extend the fixture block, the one side that the through-hole was kept away from to the extension fixture block is provided with the fixing clip strip, one side that the jack catch is close to the track ring is provided with the toothholder, fixed track tooth under the toothholder, track tooth cooperatees with the track ring, be provided with annular rack under the track ring, be provided with the rotation hole.

Adopt above-mentioned technical scheme, the jack catch can remove in the spout, when bevel gear in the rotation hole rotates, bevel gear can drive the track ring through the annular rack under the track ring and rotate, when the track ring rotates, the spiral track on the track ring cooperates with the track tooth under the toothholder, drive three jack catch and draw close to or leave to the disk body center simultaneously, because the fixed distance between extension fixture block and the through-hole on the jack catch is far away, extend the work piece that the fixture block can the centre gripping diameter is great, jack catch and toothholder can separate, separate three jack catch and toothholder, turn the direction with the jack catch again and install, the fixed gib block just can play the effect of normal centre gripping work piece this moment.

Preferably, the extension fixture block and the fixing fixture strip are provided with anti-skid grains.

By adopting the technical scheme, the friction force can be increased by the anti-slip lines, and the slip in the machining process is prevented from causing danger.

Preferably, one side of the bevel gear, which is far away from the track ring, is provided with a wrench hole, and the wrench hole is square.

By adopting the technical scheme, the wrench hole is convenient for rotating the bevel gear, so that the clamping jaws are controlled to clamp a workpiece.

Preferably, a detachable wrench is arranged in the wrench hole, the wrench is T-shaped, and a clamping head corresponding to the wrench hole is arranged at the bottom of the wrench.

By adopting the technical scheme, a worker inserts the clamping head of the wrench into the wrench hole, holds the other two ends of the wrench to rotate, and then can drive the bevel gear to rotate, and if the workpiece is required to be fixed tightly on the chuck, the wrench can also apply the stressing rod.

Preferably, the jaw and the tooth holder are fixed through two bolts, and the bolts penetrate through the jaw and are fixed on the tooth holder.

By adopting the technical scheme, the tooth holder can not turn in the direction due to the matching of the tooth holder and the spiral track, when the direction of the clamping jaw needs to be changed, the bolt is dismantled, the clamping jaw is separated from the tooth holder, and the clamping jaw is installed on the tooth holder after the direction of the clamping jaw is changed.

Preferably, the three sliding grooves are symmetrically provided with limiting strips, two sides of each jaw are provided with limiting grooves, and the limiting grooves of the jaws are matched with the limiting strips in the three sliding grooves.

By adopting the technical scheme, the limiting strip and the limiting groove have a limiting effect on the clamping jaw, so that the clamping jaw can only slide in the sliding groove.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is a schematic view of the wrench of the present invention.

Reference numerals: 1. a tray body; 11. a through hole; 2. an orbital ring; 21. A helical track; 22. an annular rack; 3. a chute; 31. a limiting strip; 4. a claw; 41. a limiting groove; 42. extending the fixture block; 43. fixing the clamping strip; 44. anti-skid lines; 5. a tooth holder; 51. track teeth; 6. Rotating the hole; 7. a bevel gear; 71. A wrench hole; 8. a wrench; 81. clamping a head; 9. and (4) bolts.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

As shown in fig. 1 to 3, a three-jaw chuck comprises a chuck body 1, a track ring 2 which can rotate in the chuck body 1 is installed in the chuck body 1, a spiral track 21 is fixed on the track ring 2, an annular rack 22 is fixed under the track ring 2, three sliding grooves 3 are uniformly formed in the chuck body 1, jaws 4 are installed in the sliding grooves 3, limiting strips 31 are symmetrically arranged in the three sliding grooves 3, limiting grooves 41 are formed in two sides of the three jaws 4, the limiting grooves 41 of the three jaws 4 are matched with the limiting strips 31 in the three sliding grooves 3, an extending fixture block 42 is fixed at one end of each jaw 4 far away from a through hole, the extending fixture block 42 is arc-shaped, a fixing fixture strip 43 is fixed at one side of the extending fixture block 42 far away from the through hole 11, anti-skid grains 44 are arranged on the extending fixture block 42 and the fixing fixture strip 43, a tooth holder 5 is installed at one side of each jaw 4 near the track ring 2, track teeth 51 are matched with a track ring 2, a rotating hole 6 is arranged between two sliding chutes 3 on a tray body 1, a bevel gear 7 is installed in the rotating hole 6, the bevel gear 7 is matched with a rack, one side of the bevel gear 7, which is far away from the track ring 2, is provided with a square wrench hole 71, the wrench hole 71 is matched with a corresponding detachable wrench 8, the wrench 8 is in a T shape, the bottom of the wrench 8 is processed into a square chuck 81, when a workpiece is required to be clamped on a chuck, the chuck 81 at the bottom of the wrench 8 is inserted into the wrench hole 71, the wrench 8 is rotated, the wrench 8 rotates the bevel gear 7 through the chuck 81 and the wrench hole 71, the bevel gear 7 rotates to drive the track ring 2 to rotate through an annular track, a helical track 21 rotates along with the track ring 2, because the helical track 21 is matched with the track teeth 51, the track teeth 51 drive clamping jaws 4 on a tooth base 5 to move, and because three tooth bases 5 are connected on one, when the track ring 2 rotates, the three tooth holders 5 can simultaneously drive the three clamping jaws 4 to approach each other at the same speed, the three clamping jaws 4 can fix a workpiece, the moving distances of the three clamping jaws 4 are all the same, the workpiece can be automatically fixed at the center of the disc body 1 by the three clamping jaws 4 at the moment, when the diameter of the workpiece to be machined is small, the clamping jaws 4 can be detached from the tooth holders 5, the tooth holders 5 are installed after the workpiece is overturned, the fixing clamping strips 43 can clamp the workpiece, after the workpiece is machined, the wrench 8 is inserted into the wrench hole 71 and rotates in the opposite direction, the wrench 8 drives the bevel gear to rotate in the opposite direction, the bevel gear moves the clamping jaws 4 towards the edge direction of the disc body 1 through the track ring 2, and the workpiece is loosened by the clamping jaws 4.

As shown in fig. 1, the jaw 4 and the toothholder 5 are fixed by two bolts 9, the bolt 9 passes through the jaw 4 and is fixed on the toothholder 5, when one bolt 9 is fixed to the jaw 4 and the toothholder 5, the jaw 4 can rotate on the toothholder 5, the two bolts 9 can prevent the jaw 4 from rotating when being installed, when the direction of the jaw 4 needs to be changed, the bevel gear 7 rotates in the reverse direction, the bevel gear 7 drives the track ring 2 to rotate, the track ring 2 can rotate the jaw 4 and the toothholder 5 from the disc body 1, the two bolts 9 are detached, the jaw 4 is installed on the toothholder 5 in the overturning direction, the jaw 4 is fixed on the toothholder 5 by the bolts 9, in the process of installing the three jaws 4 back to the chute 3, the bevel gear 7 is rotated in the positive direction, and the toothholder 5 can be automatically matched on the spiral track 21 by the track ring 2.

As shown in fig. 1, the extending locking block 42 and the fixing locking strip 43 are provided with anti-slip patterns 44, and the anti-slip patterns 44 can prevent the workpiece from slipping during clamping or machining, which causes danger and machining errors.

As shown in fig. 1, when the workpiece is long as a whole, and the length to be processed is short, and the diameter of the workpiece is smaller than that of the through hole 11, the workpiece can be placed in the through hole 11 to increase stability.

Claims

1. The three-jaw chuck is characterized by comprising a chuck body (1), wherein a through hole (11) is formed in the center of the chuck body (1), a track ring (2) is arranged in the chuck body (1), a spiral track (21) is arranged on the track ring (2), three sliding grooves (3) are uniformly formed in the chuck body (1), clamping jaws (4) are arranged in the sliding grooves (3), one ends, far away from the through hole (11), of the clamping jaws (4) are connected with extension clamping blocks (42), the extension clamping blocks (42) are arc-shaped, one sides, far away from the through hole (11), of the extension clamping blocks (42) are provided with fixing clamping strips (43), one sides, close to the track ring (2), of the clamping jaws (4) are provided with tooth bases (5), track teeth (51) are fixed under the tooth bases (5), the track teeth (51) are matched with the spiral track (21), and annular racks (22) are arranged under the track ring (2), a rotating hole (6) is formed between the two sliding grooves (3) in the tray body (1), a bevel gear (7) is arranged in the rotating hole (6), and the bevel gear (7) is matched with the rack.

2. A three-jaw chuck according to claim 1, wherein the extended retaining block (42) and the fixed retaining strip (43) are provided with anti-slip threads (44).

3. The three-jaw chuck according to claim 2, characterized in that a wrench hole (71) is formed on one side of the bevel gear (7) far away from the track ring (2), and the wrench hole (71) is square.

4. A three-jaw chuck according to claim 3, characterized in that a detachable wrench (8) is arranged in the wrench hole (71), the wrench (8) is T-shaped, and the bottom of the wrench (8) is provided with a clamp head (81) corresponding to the wrench hole (71).

5. A three-jaw chuck according to claim 4, characterized in that the jaws (4) are secured to the toothholder (5) by means of two bolts (9), said bolts (9) being secured to the toothholder (5) through the jaws (4).

6. The three-jaw chuck according to claim 5, characterized in that limiting strips (31) are symmetrically arranged in the three sliding grooves (3), limiting grooves (41) are formed in two sides of the three clamping jaws (4), and the limiting grooves (41) of the three clamping jaws (4) are matched with the limiting strips (31) in the three sliding grooves (3).