CN221538347U

CN221538347U - Cutting positioning tool for worm shaft

Info

Publication number: CN221538347U
Application number: CN202322783221.8U
Authority: CN
Inventors: 厉建华
Original assignee: Ningbo Newstar Precision Machinery Co Ltd
Current assignee: Ningbo Newstar Precision Machinery Co Ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-08-16
Anticipated expiration: 2033-10-17

Abstract

The utility model relates to a cutting positioning tool for a worm shaft, which comprises a workbench, a worm shaft body and two clamping mechanisms, wherein the two clamping mechanisms are symmetrically arranged at the top of the workbench, each clamping mechanism comprises a supporting seat and two clamping jaws, a V-shaped groove is formed in the top of each supporting seat, the two clamping jaws are respectively arranged at the top of each supporting seat, a lifting assembly capable of driving the two clamping jaws to lift is arranged in each supporting seat, a rotating assembly capable of driving the two clamping jaws to rotate is further arranged in each supporting seat, the rotating assembly is positioned above the lifting assembly, a first connecting part is arranged between the rotating assembly and the lifting assembly, and the clamping jaws and the V-shaped grooves can accurately find the axial position of the worm shaft body in the process of driving the clamping jaws to clamp the worm shaft body by the lifting assembly through the matching of the lifting assembly, the clamping jaws and the V-shaped grooves.

Description

Cutting positioning tool for worm shaft

Technical Field

The utility model relates to the technical field of worm shaft production and processing, in particular to a cutting positioning tool for a worm shaft.

Background

The worm is a gear having one or several helical teeth and meshed with the worm wheel to form a pair of staggered axis gears. The indexing curved surface can be a cylindrical surface, a conical surface or a circular ring surface, and comprises four categories of Archimedes worm, involute worm, normal straight profile worm and conical surface enveloping cylindrical worm.

The presently disclosed Chinese patent CN204339067U discloses a cutting tool structure for a worm shaft, which comprises the worm shaft, one end of the worm shaft is clamped by a chuck, the other end of the worm shaft is propped by a thimble, the chuck is connected with a driving motor, the driving motor drives the chuck to rotate, a cutting tool capable of moving back and forth along the axis direction of the worm shaft is arranged above the worm shaft, an alloy guide sleeve is arranged below the worm shaft, the worm shaft is supported on the alloy guide sleeve, the alloy guide sleeve corresponds to the cutting tool in position, and the alloy guide sleeve moves synchronously with the cutting tool. The alloy guide sleeve is arranged at the position below the worm shaft corresponding to the cutting tool, and is used for supporting the worm shaft, so that when the cutting tool cuts the worm shaft, the worm shaft cannot deform due to the support of the alloy guide sleeve, the problems of cutter yielding and vibration patterns cannot occur, the quality of the worm shaft can be effectively improved, and the production cost of enterprises is reduced.

According to the above patent, the device is characterized in that the clamping head, the thimble and the alloy guide sleeve are matched with each other, the clamping head clamps one end of the worm shaft, the thimble props the other end of the worm shaft, the alloy guide sleeve is used for supporting the worm shaft, so that the worm shaft is machined, but the device usually needs to manually find the axle center of the worm shaft when clamping and fixing the worm shaft, and time and labor are wasted.

Disclosure of utility model

Based on the above, it is necessary to solve the problem in the prior art and provide a cutting positioning tool for a worm shaft, the worm shaft to be processed is placed in the V-shaped groove through the cooperation among the lifting assembly, the clamping jaw and the V-shaped groove, the lifting assembly drives the clamping jaw to press down, the clamping jaw and the V-shaped groove cooperate with each other in the pressing down process, and the axis position of the worm shaft to be processed can be ensured to be at the center of the V-shaped groove, so that the clamping tool can automatically find the axis of the worm shaft to be processed when clamping the worm shaft to be processed, and the working efficiency is improved.

In order to solve the problems in the prior art, the utility model provides a cutting positioning tool for a worm shaft, which comprises a workbench 1, a worm shaft body 2 and a clamping mechanism 3;

The fixture 3 has two, two fixture 3 symmetry set up in the top of workstation 1, fixture 3 includes supporting seat 4 and two clamping jaws 31, the top of supporting seat 4 is equipped with the V-arrangement groove 41 that is used for placing worm axle body 2, two clamping jaws 31 are located the top both sides of supporting seat 4 respectively, the inside of supporting seat 4 is equipped with the lifting unit 32 that can drive two clamping jaws 31 and go up and down, the inside of supporting seat 4 still is equipped with the rotating assembly 34 that can drive two clamping jaws 31 and rotate, rotating assembly 34 is located the top of lifting unit 32, be provided with first connecting portion 35 between rotating assembly 34 and the lifting unit 32.

Preferably, the lifting assembly 32 includes a first rotating motor 321, a driven block 324, a first driven rod 325, and a connecting rod;

The first rotating motor 321 is horizontally arranged on one side of the supporting seat 4, a first mounting plate 322 is arranged at one end, close to the supporting seat 4, of the first rotating motor 321, the first rotating motor 321 is connected with the supporting seat 4 through the mounting plate, an output shaft of the first rotating motor 321 penetrates through the supporting seat 4 to extend towards the inside of the supporting seat 4, a cam 323 is arranged on the output shaft of the first rotating motor 321, and the cam 323 is connected with the output shaft of the first rotating motor 321;

The first driven rods 325 are two, the two first driven rods 325 are symmetrically arranged on two sides of the cam 323, one end of each first driven rod 325 is provided with a second connecting part 36, and one end of each second connecting part 36 is connected with the clamping jaw 31;

The driven block 324 is horizontally arranged between the two first driven rods 325, two ends of the driven block 324 are respectively connected with the corresponding first driven rods 325, and a perforation is arranged at the center of the driven block 324;

the second driven rod 326 is vertically inserted into the through hole on the driven block 324, one end of the second driven rod 326 is in butt joint with the cam 323, the other end of the second driven rod 326 extends towards the bottom of the supporting seat 4, a notch matched with the second driven rod 326 is formed in the bottom of the supporting seat 4, and the second driven rod 326 is provided with the buffer part 33.

Preferably, the buffer 33 includes a spring 331;

The spring 331 is sleeved on the second driven rod 326, one end of the spring 331 is in butt joint with the driven block 324, and the other end of the spring 331 is in butt joint with the bottom of the supporting seat 4.

Preferably, the second connection portion 36 includes a bearing 361 and a sleeve 362;

The two bearings 361 are respectively sleeved at one end of the clamping jaw 31 close to the lifting assembly 32, and the bearings 361 are connected with the clamping jaw 31;

The number of the sleeves 362 is identical to that of the bearings 361, the sleeves 362 are sleeved on the bearings 361, one ends of the sleeves 362 are connected with the corresponding bearings 361, and the other ends of the sleeves 362 are respectively connected with the corresponding first driven rods 325.

Preferably, the rotating assembly 34 includes a second rotating motor 341, a screw 343, a slide rail 344, and a rack 347;

The second rotating motor 341 is arranged above the first rotating motor 321, one end of the second rotating motor 341, which is close to the supporting seat 4, is provided with a second mounting plate 342, a plurality of guide posts 345 are arranged below the second mounting plate 342, one ends of the guide posts 345 are connected with the second mounting plate 342, the other ends of the guide posts 345 extend towards the inside of the first mounting plate 322, and the first mounting plate 322 is correspondingly provided with notches matched with the guide posts 345;

The sliding rail 344 is transversely arranged in the supporting seat 4, a sliding block 3441 is arranged in the sliding rail 344 in a sliding mode, a first connecting rod 346 is arranged at the top of the sliding block 3441, and one end of the first connecting rod 346 is connected with the sliding block 3441;

The screw rod 343 is transversely arranged in the sliding rail 344, one end of the screw rod 343 is rotationally connected with one end of the sliding rail 344 far away from the second rotating motor 341, the other end of the screw rod 343 penetrates through the sliding block 3441 and the sliding rail 344 to be connected with the second rotating motor 341, and the screw rod 343 is in threaded connection with the sliding block 3441;

The rack 347 is transversely arranged between the two gears 348, both sides of the gears 348 are meshed with the corresponding gears 348, the gears 348 are respectively connected with the corresponding clamping jaws 31, a first connecting rod 346 is arranged at the bottom of the rack 347, one end of the first connecting rod 346 is connected with the rack 347, and the other end of the first connecting rod 346 is connected with the sliding block 3441.

Preferably, the first connection part 35 includes a second link 351;

The second connecting rods 351 are provided with a plurality of second connecting rods 351, the second connecting rods 351 are symmetrically arranged at the bottom of the sliding rail 344, one end of each second connecting rod 351 is connected with the sliding rail 344, and the other end of each second sliding rail 344 is connected with the passive block 324.

Preferably, the V-shaped groove 41 and the clamping jaw 31 are respectively provided with a plurality of balls 311, the balls 311 are symmetrically arranged on the V-shaped groove 41 and the clamping jaw 31, the balls 311 are rotationally connected with the supporting seat 4 and the clamping jaw 31, and the surfaces of the balls 311 can be in abutting connection with the worm shaft body 2.

Compared with the prior art, the application has the beneficial effects that:

1. according to the application, through the cooperation of the lifting assembly, the clamping jaw and the V-shaped groove, the axial center position of the worm shaft body can be accurately found by the lifting assembly in the process of driving the clamping jaw to clamp the worm shaft body.

2. According to the application, through the mutual matching of the rotating assembly and the clamping jaw, the rotating assembly drives the clamping jaw to rotate, so that the clamping jaw can not cover the V-shaped groove, and the worm shaft body can be taken out more conveniently.

Drawings

Fig. 1 is a schematic perspective view of a cutting positioning tool for a worm shaft.

Fig. 2 is a partial structural cross-sectional view of a cutting positioning tool for a worm shaft.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a partial sectional view of a cutting positioning tool for a worm shaft.

Fig. 5 is an enlarged view at B in fig. 4.

The reference numerals in the figures are: 1-a workbench; a 2-worm shaft body; 3-a clamping mechanism; 31-clamping jaw; 311-balls; 32-a lifting assembly; 321-a first rotating electrical machine; 322-a first mounting plate; 323-cam; 324-passive block; 325-a first driven lever; 326-a second driven rod; 33-a buffer part; 331-a spring; 34-a rotating assembly; 341-a second rotary electric machine; 342-a second mounting plate; 343-lead screw; 344-sliding rail; 3441-a slider; 345-guide post; 346-first link; 347-rack; 348-gear; 35-a first connection; 351-a second link; 36-a second connection; 361-a bearing; 362-sleeve; 4-a supporting seat; 41-V-shaped grooves.

Detailed Description

The utility model will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the utility model and the specific objects and functions achieved.

Referring to fig. 1 to 5, a cutting positioning tool for a worm shaft, including a workbench 1, a worm shaft body 2 and a clamping mechanism 3, the clamping mechanism 3 has two, two clamping mechanisms 3 are symmetrically arranged at the top of the workbench 1, the clamping mechanism 3 includes a supporting seat 4 and two clamping jaws 31, the top of the supporting seat 4 is provided with a V-shaped groove 41 for placing the worm shaft body 2, the two clamping jaws 31 are respectively arranged at two sides of the top of the supporting seat 4, a lifting component 32 capable of driving the two clamping jaws 31 to lift is arranged in the supporting seat 4, a rotating component 34 capable of driving the two clamping jaws 31 to rotate is further arranged in the supporting seat 4, the rotating component 34 is positioned above the lifting component 32, and a first connecting part 35 is arranged between the rotating component 34 and the lifting component 32.

During operation, the rotating assembly 34 is started, the rotating assembly 34 drives the gears 348 to rotate, the gears 348 drive the two clamping jaws 31 to rotate simultaneously, the clamping jaws 31 can not cover the V-shaped grooves 41, after the clamping jaws 31 rotate in place, the two ends of the worm shaft body 2 are respectively placed on the V-shaped grooves 41, the rotating assembly 34 is started again after placement is completed, the rotating assembly 34 drives the two clamping jaws 31 to return to the original position, the lifting assembly 32 is started after the lifting assembly 32 returns to the original position, the lifting assembly 32 drives the two clamping jaws 31 and the rotating assembly 34 through the second connecting portion 36 to move simultaneously, the clamping jaws 31 can firmly fix the two ends of the worm shaft body 2 for processing, after processing is completed, the lifting assembly 32 is started to enable the clamping jaws 31 to leave from the worm shaft body 2, after the clamping jaws 31 leave from the worm shaft surface, after the rotating assembly 34 rotates in place, the worm shaft body 2 can be taken out, the lifting assembly 32 can be matched with the V-shaped grooves 41 through the lifting assembly 32, the worm shaft body 2 can be clamped by the lifting assembly 32 when the clamping jaws 31 clamp the worm shaft body 2, the clamping jaw 31 can be clamped by the worm shaft body 2, the clamping jaws 31 can not cover the clamping jaws 31, and the clamping jaws 31 can be conveniently taken out, and the clamping jaws 31 can not cover the V-shaped grooves 31.

Referring to fig. 2 and 4, the lifting assembly 32 includes a first rotating motor 321, a driven block 324, a first driven rod 325 and a connecting rod, the first rotating motor 321 is horizontally disposed on one side of the supporting seat 4, one end of the first rotating motor 321 close to the supporting seat 4 is provided with a first mounting plate 322, the first rotating motor 321 is connected with the supporting seat 4 through the mounting plate, an output shaft of the first rotating motor 321 passes through the supporting seat 4 and extends towards the inside of the supporting seat 4, a cam 323 is disposed on the output shaft of the first rotating motor 321, the cam 323 is connected with the output shaft of the first rotating motor 321, the first driven rod 325 is provided with two first driven rods 325, two first driven rods 325 are symmetrically disposed on two sides of the cam 323, one ends of the first driven rods 325 are respectively provided with a second connecting portion 36, one ends of the second connecting portion 36 are connected with the clamping jaw 31, two ends of the driven blocks 324 are respectively connected with the corresponding first driven rods 325, a through hole is disposed at the center of the driven block 324, the second driven rod 326 is vertically inserted into the driven block 326, the second driven rod 326 is vertically inserted into the through hole 326, the second driven rod 326 is vertically inserted into the driven rod 326 is provided with the second driven rod 326, and the other end is matched with the bottom of the second driven rod 4, and the driven rod is provided with the bottom of the second driven rod 33 is matched with the bottom with the second driven rod 33.

When the worm shaft clamping device works, the first rotating motor 321 is started, the first rotating motor 321 drives the cam 323 to rotate, the cam 323 rotates to press down the second driven rod 326, the top of the second driven rod 326 presses down the driven block 324, the driven block 324 drives the second driven rod 326 to descend, and the second driven rod 326 descends while driving the clamping jaw 31 to descend through the second connecting part 36, so that the worm shaft body 2 is clamped.

Referring to fig. 2 and 4, the buffer portion 33 includes a spring 331, the spring 331 is sleeved on the second driven rod 326, one end of the spring 331 is disposed in abutment with the driven block 324, and the other end of the spring 331 is disposed in abutment with the bottom of the supporting seat 4.

When the cam 323 drives the driven block 324 to move downwards through the second driven rod 326, the spring 331 is compressed in the process of moving downwards the driven block 324, and the reaction force generated by compression of the spring 331 can jack up the driven rod through the driven block 324, so that the top of the driven rod can be always kept in abutting connection with the cam 323.

Referring to fig. 4 and 5, the second connecting portion 36 includes two bearings 361 and a sleeve 362, the two bearings 361 are respectively sleeved at one end of the clamping jaw 31 near the lifting assembly 32, the bearings 361 are connected with the clamping jaw 31, the number of the sleeves 362 is identical to that of the bearings 361, the sleeves 362 are sleeved on the bearings 361, one end of each sleeve 362 is connected with the corresponding bearing 361, and the other end of each sleeve 362 is connected with the corresponding first driven rod 325.

When the second driven rod 326 goes up and down, the second driven rod 326 drives the first driven rod 325 to go up and down through the driven block 324, the first driven rod 325 drives the bearing 361 to go up and down through the sleeve 362, the bearing 361 drives the clamping jaw 31 to go up and down, and the bearing 361 ensures that the clamping jaw 31 can go up and down and also can realize the rotation of the clamping jaw 31 through the cooperation of the rotating assembly 34 and the clamping jaw 31.

Referring to fig. 2 and 3, the rotating assembly 34 includes a second rotating motor 341, a screw rod 343, a sliding rail 344 and a rack 347, the second rotating motor 341 is disposed above the first rotating motor 321, one end of the second rotating motor 341 near the supporting seat 4 is provided with a second mounting plate 342, a plurality of guide posts 345 are disposed below the second mounting plate 342, one end of each guide post 345 is connected with the second mounting plate 342, the other end of each guide post 345 extends toward the inside of the first mounting plate 322, notches matched with the guide posts 345 are correspondingly formed on the first mounting plate 322, the sliding rail 344 is transversely disposed in the supporting seat 4, the sliding rail 344 is slidably provided with a sliding block 3441, the top of the sliding block 3441 is provided with a first connecting rod 346, one end of a first connecting rod 346 is connected with a sliding block 3441, a screw rod 343 is transversely arranged in a sliding rail 344, one end of the screw rod 343 is rotationally connected with one end of the sliding rail 344, which is far away from the second rotating motor 341, the other end of the screw rod 343 penetrates through the sliding block 3441 and the sliding rail 344 to be connected with the second rotating motor 341, the screw rod 343 is in threaded connection with the sliding block 3441, a rack 347 is transversely arranged between two gears 348, two sides of the gears 348 are respectively meshed with the corresponding gears 348, the gears 348 are respectively connected with corresponding clamping jaws 31, a first connecting rod 346 is arranged at the bottom of the rack 347, one end of the first connecting rod 346 is connected with the rack 347, and the other end of the first connecting rod 346 is connected with the sliding block 3441.

When the second rotating motor 341 is started, the second rotating motor 341 drives the screw rod 343 to rotate, the screw rod 343 drives the sliding block 3441 to move, the sliding block 3441 drives the rack 347 to move through the first connecting rod 346, the rack 347 moves and simultaneously drives gears 348 which are meshed with the two sides of the rack 347 to rotate, and the gears 348 rotate to drive the clamping jaw 31 to rotate.

Referring to fig. 2 and 4, the first connection portion 35 includes a plurality of second connection rods 351, the plurality of second connection rods 351 are symmetrically disposed at the bottom of the sliding rail 344, one end of each second connection rod 351 is connected with the sliding rail 344, and the other end of each second sliding rail 344 is connected with the passive block 324.

When the first rotating motor 321 works, the first rotating motor 321 drives the cam 323 to rotate, the cam 323 drives the driven block 324 to lift through the second driven rod 326, the driven block 324 drives the second connecting rod 351 to lift while the driven block 324 lifts, the second connecting rod 351 lifts and drives the sliding rail 344 connected to the top of the second connecting rod to lift, the sliding rail 344 lifts and drives the sliding block 3441, the lead screw 343, the second rotating motor 341, the first connecting rod 346 and the rack 347 to lift, the gear 348 and the rack 347 can be kept in a meshed state all the time while the clamping jaw 31 lifts and lifts, and openings for the second rotating motor 341, the lead screw 343 and the rack 347 to lift are formed in two sides of the supporting seat 4.

Referring to fig. 4, a plurality of balls 311 are disposed on the V-shaped groove 41 and the clamping jaw 31, the balls 311 are symmetrically disposed on the V-shaped groove 41 and the clamping jaw 31, the balls 311 are rotatably connected with the support base 4 and the clamping jaw 31, and the surfaces of the balls 311 can be abutted with the worm shaft body 2.

After the clamping jaw 31 clamps the worm shaft body 2, and then the worm shaft body 2 can still rotate through the balls 311 arranged on the clamping jaw 31 and the V-shaped groove 41, so that subsequent processing can be performed.

The foregoing examples merely illustrate one or more embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims

1. The cutting positioning tool for the worm shaft is characterized by comprising a workbench (1), a worm shaft body (2) and a clamping mechanism (3);

Clamping mechanism (3) have two, two clamping mechanism (3) symmetry set up in the top of workstation (1), clamping mechanism (3) are including supporting seat (4) and two clamping jaw (31), the top of supporting seat (4) is equipped with V-arrangement groove (41) that are used for placing worm axle body (2), the top both sides of supporting seat (4) are located respectively to two clamping jaw (31), the inside of supporting seat (4) is equipped with lifting unit (32) that can drive two clamping jaw (31) and go up and down, the inside of supporting seat (4) still is equipped with rotary unit (34) that can drive two clamping jaw (31) rotation, rotary unit (34) are located the top of lifting unit (32), be provided with first connecting portion (35) between rotary unit (34) and lifting unit (32).

2. The cutting and positioning tool for a worm shaft according to claim 1, wherein the lifting assembly (32) comprises a first rotating motor (321), a driven block (324), a first driven rod (325) and a connecting rod;

The first rotating motor (321) is horizontally arranged on one side of the supporting seat (4), a first mounting plate (322) is arranged at one end, close to the supporting seat (4), of the first rotating motor (321), the first rotating motor (321) is connected with the supporting seat (4) through the mounting plate, an output shaft of the first rotating motor (321) penetrates through the supporting seat (4) to extend towards the inside of the supporting seat (4), a cam (323) is arranged on the output shaft of the first rotating motor (321), and the cam (323) is connected with the output shaft of the first rotating motor (321);

The first driven rods (325) are two, the two first driven rods (325) are symmetrically arranged on two sides of the cam (323), one end of each first driven rod (325) is provided with a second connecting part (36), and one end of each second connecting part (36) is connected with the clamping jaw (31);

The driven blocks (324) are horizontally arranged between the two first driven rods (325), two ends of each driven block (324) are respectively connected with the corresponding first driven rods (325), and a perforation is arranged at the center of each driven block (324);

The second driven rod (326) is vertically inserted into a through hole on the driven block (324), one end of the second driven rod (326) is in butt joint with the cam (323), the other end of the second driven rod (326) extends towards the bottom of the supporting seat (4), a notch matched with the second driven rod (326) is formed in the bottom of the supporting seat (4), and a buffer part (33) is arranged on the second driven rod (326).

3. A cutting positioning tool for a worm shaft according to claim 2, characterized in that the buffer (33) comprises a spring (331);

The spring (331) is sleeved on the second driven rod (326), one end of the spring (331) is in butt joint with the driven block (324), and the other end of the spring (331) is in butt joint with the bottom of the supporting seat (4).

4. The cutting positioning tool for a worm shaft according to claim 1, wherein the second connecting portion (36) includes a bearing (361) and a sleeve (362);

The two bearings (361) are respectively sleeved at one end of the clamping jaw (31) close to the lifting assembly (32), and the bearings (361) are connected with the clamping jaw (31);

The number of the sleeves (362) is consistent with that of the bearings (361), the sleeves (362) are sleeved on the bearings (361), one ends of the sleeves (362) are connected with the corresponding bearings (361), and the other ends of the sleeves (362) are respectively connected with the corresponding first driven rods (325).

5. The cutting positioning tool for a worm shaft according to claim 1, wherein the rotating assembly (34) includes a second rotating motor (341), a screw (343), a slide rail (344), and a rack (347);

The second rotating motor (341) is arranged above the first rotating motor (321), a second mounting plate (342) is arranged at one end, close to the supporting seat (4), of the second rotating motor (341), a plurality of guide posts (345) are arranged below the second mounting plate (342), one ends of the guide posts (345) are connected with the second mounting plate (342), the other ends of the guide posts (345) extend towards the inside of the first mounting plate (322), and notches matched with the guide posts (345) are correspondingly formed in the first mounting plate (322);

The sliding rail (344) is transversely arranged in the supporting seat (4), a sliding block (3441) is arranged in the sliding rail (344), a first connecting rod (346) is arranged at the top of the sliding block (3441), and one end of the first connecting rod (346) is connected with the sliding block (3441);

The screw rod (343) is transversely arranged in the sliding rail (344), one end of the screw rod (343) is rotationally connected with one end of the sliding rail (344) far away from the second rotating motor (341), the other end of the screw rod (343) penetrates through the sliding block (3441) and the sliding rail (344) to be connected with the second rotating motor (341), and the screw rod (343) is in threaded connection with the sliding block (3441);

The rack (347) is transversely arranged between the two gears (348), two sides of each gear (348) are respectively connected with the corresponding gears (348) in a meshed mode, each gear (348) is respectively connected with the corresponding clamping jaw (31), a first connecting rod (346) is arranged at the bottom of each rack (347), one end of each first connecting rod (346) is connected with each rack (347), and the other end of each first connecting rod (346) is connected with the corresponding sliding block (3441).

6. A cutting positioning tool for a worm shaft according to claim 1, characterized in that the first connection part (35) comprises a second link (351);

the second connecting rods (351) are symmetrically arranged at the bottom of the sliding rail (344), one ends of the second connecting rods (351) are connected with the sliding rail (344), and the other ends of the second sliding rails (344) are connected with the driven blocks (324).

7. The cutting and positioning tool for the worm shaft according to claim 1, wherein a plurality of balls (311) are arranged on the V-shaped groove (41) and the clamping jaw (31), the balls (311) are symmetrically arranged on the V-shaped groove (41) and the clamping jaw (31), the balls (311) are rotationally connected with the supporting seat (4) and the clamping jaw (31), and the surfaces of the balls (311) can be in abutting connection with the worm shaft body (2).