CN220862738U - Gear blank excircle turning device - Google Patents

Abstract

The utility model relates to a gear blank excircle turning device, belonging to the technical field of turning equipment, comprising a workbench, wherein a clamping mechanism for clamping a workpiece and a cutting mechanism for turning the workpiece are arranged on the workbench; the workbench is rotationally connected with an adjusting block, an adjusting plate is arranged between the adjusting block and the operating block, two ends of the adjusting plate are rotationally connected with the adjusting block and the operating block respectively, a rotation axis of the adjusting plate is eccentrically arranged compared with a rotation axis of the adjusting block, and an adjusting rod is arranged on the side wall of the adjusting block. The utility model has the effect of facilitating the turning of the excircle of the workpiece.

Description

Gear blank excircle turning device

Technical Field

The utility model relates to the technical field of turning equipment, in particular to a gear blank excircle turning device.

Background

The gear blank comprises a hard disc-shaped workpiece, and the excircle of the workpiece is usually turned by an excircle turning device in the prior art, so that the outer diameters of the workpiece are consistent. The turning device comprises a workbench, a clamping mechanism used for clamping a workpiece is arranged at one end of the workbench, an operation block is connected to the workbench in a sliding manner, a cutting knife used for turning the outer circle of the workpiece is fixedly arranged on the operation block, a sliding rail is fixedly arranged on the workbench, a sliding groove matched with the sliding rail is formed in the operation block, and an operator can enable the cutting knife to slide to be in contact with the workpiece in a manner of pushing the operation block and conduct turning on the outer circle of the workpiece.

However, in the practical use process, the manual pushing and pulling of the operation block is laborious, and the sliding distance of the operation block on the workbench is difficult to control.

Disclosure of utility model

In order to facilitate turning of the excircle of a machined part, the application provides a gear blank excircle turning device.

The application provides a gear blank excircle turning device, which adopts the following technical scheme:

The gear blank excircle turning device comprises a workbench, wherein a clamping mechanism for clamping a workpiece and a cutting mechanism for turning the workpiece are arranged on the workbench, the cutting mechanism comprises a cutting knife and an operating block arranged on the workbench in a sliding manner, a mounting assembly for mounting the cutting knife is arranged on the operating block, an adjusting slide rail is arranged on the workbench, an adjusting slide groove matched with the adjusting slide rail is formed in the operating block, and the clamping mechanism is positioned on a sliding track of the operating block;

The workbench is rotationally connected with an adjusting block, an adjusting plate is arranged between the adjusting block and the operating block, two ends of the adjusting plate are rotationally connected with the adjusting block and the operating block respectively, a rotating axis of the adjusting plate is eccentrically arranged compared with a rotating axis of the adjusting block, and an adjusting rod is arranged on the side wall of the adjusting block.

By adopting the technical scheme, the sliding track of the operation block is limited under the cooperation of the adjusting slide rail and the adjusting slide groove, so that the reliability of turning the workpiece by driving the cutting knife through the sliding of the operation block is improved; when the adjusting rod rotates, the adjusting block can be driven to rotate through the adjusting plate, so that the operating block can slide along the adjusting slide rail under the action of the adjusting plate, thereby saving manpower and being convenient for controlling the sliding of the operating block.

Preferably, the installation component includes the installation piece that slides and set up on the operation piece, be equipped with on the operation piece with adjust the perpendicular roll adjustment slide rail of slide rail, set up on the installation piece with roll adjustment slide rail complex roll adjustment spout, be equipped with the mounting that is used for fixed cutting sword on the installation piece.

Through adopting above-mentioned technical scheme, the installation piece slides under the cooperation of roll adjustment spout and roll adjustment slide rail and sets up on the operation piece to can adjust the position of installation piece on the operation piece, make the cutting sword that is located on the installation piece can process the machined part of different diameters, enlarged the application scope of this turning excircle device.

Preferably, the fixing piece comprises a fixing block arranged on the mounting block, an arc-shaped groove for the cutting knife to be embedded is formed in the fixing block, the outer wall of the cutting knife is attached to the inner wall of the arc-shaped groove, a pressing block is further connected to the mounting block in a sliding mode, and the pressing block is matched with the fixing block to abut against the cutting knife after sliding.

Through adopting above-mentioned technical scheme, the briquetting is fixed with the installation piece through fixing bolt, thereby the length of accessible adjustment fixing bolt adjusts the distance between fixed block and the installation piece, and the cutting sword supports tightly under the pressure effect of fixed block and briquetting to be difficult for having the slip for the installation piece, promoted the reliability of cutting sword installation on the installation piece, and the dismouting of cutting sword of being convenient for.

Preferably, the fixture comprises a machine body arranged on the workbench, the machine body is rotationally connected with a mounting sleeve, a clamping rod is coaxially arranged on the mounting sleeve and is connected with the mounting sleeve in a sliding manner, the clamping rod is rotationally connected with a plurality of clamping blocks towards one end of the operating block, a clamping chute used for the sliding of the clamping blocks is formed in the inner wall of the mounting sleeve, the outer diameter of the clamping chute is sequentially decreased in a direction away from the operating block, the clamping blocks are attached to the inner wall of the clamping chute, a control piece used for controlling the sliding of the clamping rod is arranged on the machine body, and a rotating piece used for driving the mounting sleeve to rotate is arranged on the workbench.

By adopting the technical scheme, the workpiece clamped by the clamping block can be driven to synchronously rotate when the rotating piece drives the mounting sleeve to rotate, so that the cutting knife can carry out turning on the excircle of the workpiece; because the external diameter of the clamping chute is gradually decreased towards the direction away from the operation block, the clamping and loosening of the clamping block to the workpiece can be controlled only by controlling the sliding of the clamping rod in the mounting sleeve through the control piece, and the workpiece can be clamped conveniently.

Preferably, the clamping block is provided with a dovetail block towards one end of the clamping chute, a dovetail groove matched with the dovetail block is formed in the clamping chute, a limiting block is arranged at one end, deviating from the dovetail block, of the clamping block, and the machined part is attached to the limiting block and the clamping block.

By adopting the technical scheme, under the cooperation of the dovetail block and the dovetail groove, the dovetail block can slide in the dovetail groove when the clamping block slides, so that the reliability that the clamping block can be loosened after the clamping rod slides is improved, and in addition, the reliability that the clamping block follows the mounting sleeve to rotate is improved; the limiting block limits the sliding distance of the workpiece towards the clamping rod, so that the workpiece is difficult to slide towards the clamping rod to the cutting knife, and the excircle of the workpiece is difficult to carry out turning.

Preferably, the control piece comprises two limiting rings coaxially arranged on the clamping rod, the control handle is connected to the machine body in a rotating mode, an arc-shaped block is arranged at one end of the control handle, which faces the clamping rod, two ends of the arc-shaped block are respectively provided with a matching rod, the matching rods are located between the two limiting rings, and the matching rods are attached to any one limiting ring after the control handle rotates.

Through adopting above-mentioned technical scheme, make cooperation pole and arbitrary spacing ring laminating after the control handle rotates to can drive the clamping lever and slide, use manpower sparingly and be convenient for control the sliding of clamping lever.

Preferably, the adjusting block slides towards one end of the cutting mechanism and is connected with a distance control rod, and one end, far away from the adjusting block, of the distance control rod is attached to the cutting mechanism after the adjusting block slides.

Through adopting above-mentioned technical scheme, the setting of controlling the distance pole is crossed, is limited the sliding distance of operation piece towards the organism for the operation piece is difficult for sliding to the cutting sword and causes the damage to installation sleeve and grip block.

Preferably, the adjusting block is connected with the adjusting plate through an adjusting bolt, an adjusting threaded hole matched with the adjusting bolt is formed in the adjusting block, and a plurality of adjusting through holes used for the adjusting bolt to penetrate are formed in the adjusting plate.

Through adopting above-mentioned technical scheme, through the setting of a plurality of adjusting through-holes, the adjusting through-hole that adjusting bolt should pass when the operating personnel can select the installation according to actual conditions to be convenient for change and inject the length of sliding of operation piece, further make the operation piece be difficult for sliding to the cutting sword and cause the damage to the organism.

In summary, the present application includes at least one of the following beneficial technical effects:

1. Under the cooperation of the adjusting slide rail and the adjusting slide groove, the sliding track of the operating block is limited, the reliability of turning the workpiece by driving the cutting knife through the sliding of the operating block is improved, and the adjusting block can be driven to rotate through the adjusting plate when the adjusting rod rotates, so that the operating block can slide along the adjusting slide rail under the action of the adjusting plate, the labor is saved, and the sliding of the operating block is convenient to control;

2. The installation piece slides under the cooperation of roll adjustment spout and roll adjustment slide rail and sets up on the operation piece to can adjust the position of installation piece on the operation piece, make the cutting sword that is located on the installation piece can process the machined part of different diameters, enlarged the application scope of this turning excircle device.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a schematic view of a cutting mechanism according to an embodiment of the present application.

Fig. 3 is a schematic structural view of a clamping mechanism according to an embodiment of the present application.

Fig. 4 is a schematic view of a connection structure between a clamping sleeve and a clamping rod according to an embodiment of the present application.

Reference numerals illustrate: 1. a work table; 11. a clamping mechanism; 12. a cutting mechanism; 13. adjusting the sliding rail; 14. a rotating motor; 141. a drive belt; 2. an operation block; 21. adjusting the chute; 22. an adjusting block; 221. an adjusting rod; 222. an adjusting bolt; 23. an adjusting plate; 24. adjusting the through hole; 241. a connecting bolt; 25. a distance-adjusting slide rail; 26. a distance control rod; 3. a body; 31. a mounting sleeve; 311. clamping the sliding groove; 312. a dovetail groove; 32. a clamping rod; 321. a limiting ring; 33. a clamping block; 331. dovetail blocks; 332. a limiting block; 34. a control handle; 341. an arc-shaped block; 342. a mating lever; 4. a mounting block; 41. a distance adjusting chute; 42. a distance adjusting block; 421. a distance adjusting rod; 43. a distance adjusting plate; 44. a fixed block; 45. a cutting blade; 46. briquetting; 461. and (5) fixing bolts.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a gear blank excircle turning device, which comprises a workbench 1, wherein a clamping mechanism 11 for clamping a workpiece and a cutting mechanism 12 for turning the workpiece are arranged on the workbench 1. The cutting mechanism 12 comprises a cutting blade 45 and an operating block 2 which is arranged on the workbench 1 in a sliding manner, a mounting component for mounting the cutting blade 45 is arranged on the operating block 2, the clamping mechanism 11 comprises a machine body 3 which is arranged on the workbench 1, the machine body 3 is positioned on a sliding track of the operating block 2, and the cutting blade 45 can carry out turning on the excircle of a workpiece clamped on the machine body 3 after the operating block 2 slides.

Referring to fig. 1 to 2, an adjusting slide rail 13 is fixedly arranged on a workbench 1, the adjusting slide rail 13 is arranged along the sliding track of an operating block 2, an adjusting slide groove 21 matched with the adjusting slide rail 13 is formed in the operating block 2, the operating block 2 is arranged on the workbench 1 in a sliding manner under the matching of the adjusting slide rail 13 and the adjusting slide groove 21, and a machine body 3 is positioned at one end of the adjusting slide rail 13; under the cooperation of the adjusting slide rail 13 and the adjusting slide groove 21, the sliding track of the operating block 2 is limited, and the reliability of turning the workpiece by driving the cutting knife 45 through the sliding of the operating block 2 is improved.

Referring to fig. 1 to 2, an adjusting block 22 is rotatably connected to the table 1, the adjusting block 22 is cylindrically disposed, the adjusting block 22 is located at one end of the adjusting slide rail 13 away from the machine body 3, and the adjusting block 22 rotates with its own axis as a rotation axis. An adjusting plate 23 is arranged between the adjusting block 22 and the operating block 2, two ends of the adjusting plate 23 are respectively connected with the adjusting block 22 and the operating block 2 in a rotating way, and an adjusting rod 221 is fixedly arranged on the side wall of the adjusting block 22.

Referring to fig. 1 to 2, an adjusting block 22 is connected with an adjusting plate 23 through an adjusting bolt 222, a plurality of adjusting through holes 24 for the adjusting bolt 222 to penetrate are formed in the adjusting plate 23 in a penetrating manner, the plurality of adjusting through holes 24 are divided into two rows and are arranged in a staggered manner, an adjusting threaded hole matched with the adjusting bolt 222 is formed in the adjusting block 22, and the axis of the adjusting threaded hole is eccentric compared with the rotation axis of the adjusting block 22; the adjusting bolt 222 passes through any one of the adjusting through holes 24 and then is inserted into the adjusting threaded hole and screwed down, so that the adjusting plate 23 is rotationally connected with the adjusting block 22, and one end of the adjusting plate 23 connected with the adjusting block 22 rotates by taking the adjusting bolt 222 as a rotation axis. Through the arrangement of the plurality of adjusting through holes 24, an operator can select the adjusting through holes 24 through which the adjusting bolts 222 pass when in installation according to actual conditions, so that the sliding length of the operating block 2 is convenient to change and limit, and the operating block 2 is not easy to slide to the cutting knife 45 to damage the machine body 3.

Referring to fig. 1, the adjusting plate 23 is connected to the operating block 2 by a connecting bolt 241, a connecting hole for the connecting bolt 241 to pass through is provided on the adjusting plate 23, a connecting threaded hole matched with the adjusting plate 23 is provided on the operating block 2, and one end of the adjusting plate 23 connected to the operating block 2 rotates with the connecting bolt 241 as a rotation axis.

When the adjusting rod 221 rotates, the adjusting plate 23 can drive the adjusting block 22 to rotate, so that the operating block 2 can slide along the adjusting slide rail 13 under the action of the adjusting plate 23, and the sliding of the operating block 2 is controlled conveniently.

Referring to fig. 1 to 2, the mounting assembly includes a mounting block 4 slidably disposed on an operation block 2, a fixing member for fixing a cutting blade 45 is disposed on the mounting block 4, a distance adjusting slide rail 25 perpendicular to the adjusting slide rail 13 is fixedly disposed on the operation block 2, a distance adjusting slide groove 41 matched with the distance adjusting slide rail 25 is disposed on the mounting block 4, and the mounting block 4 is slidably disposed on the operation block 2 under the matching of the distance adjusting slide groove 41 and the distance adjusting slide rail 25, so that the position of the mounting block 4 on the operation block 2 can be adjusted, and the cutting blade 45 disposed on the mounting block 4 can process workpieces with different diameters.

Referring to fig. 1 to 2, the sliding mode of the control installation block 4 on the operation block 2 is consistent with the sliding mode of the control operation block 2, the operation block 2 is rotationally connected with a distance adjusting block 42, a distance adjusting plate 43 is arranged between the distance adjusting block 42 and the installation block 4, two ends of the distance adjusting plate 43 are rotationally connected with the installation block 4 and the distance adjusting block 42 respectively, a rotation axis between the distance adjusting plate 43 and the distance adjusting block 42 is eccentrically arranged compared with the rotation axis of the distance adjusting block 42, a distance adjusting rod 421 is fixedly arranged on the side wall of the distance adjusting block 42, and the distance adjusting rod 421 can drive the distance adjusting block 42 to rotate through the distance adjusting rod 421 when rotating, so that the installation block 4 can slide along the distance adjusting slide rail 25 under the action of the distance adjusting plate 43, and the sliding of the installation block 4 is convenient to control.

Referring to fig. 2, the fixing member includes a fixing block 44 fixedly arranged on the mounting block 4, an arc groove for the cutting knife 45 to be embedded is formed in the fixing block 44, the outer wall of the cutting knife 45 is attached to the inner wall of the arc groove, a pressing block 46 is slidably connected to the mounting block 4, the pressing block 46 is matched with the fixing block 44 to tightly support the cutting knife 45 after being slid, the pressing block 46 is fixed with the mounting block 4 through a fixing bolt 461, the distance between the fixing block 44 and the mounting block 4 can be adjusted by adjusting the length of the fixing bolt 461, and the cutting knife 45 is tightly supported under the pressure of the fixing block 44 and the pressing block 46, so that sliding relative to the mounting block 4 is difficult, and the reliability of mounting the cutting knife 45 on the mounting block 4 is improved. The cutting edge of the cutting blade 45 is inclined so as to facilitate turning of the outer circle of the workpiece.

Referring to fig. 1, 3 and 4, the body 3 is rotatably connected with a mounting sleeve 31, both ends of the mounting sleeve 31 penetrate through the body 3, and the mounting sleeve 31 is not easy to slip relative to the mounting sleeve 31. The installation sleeve 31 is coaxially provided with a clamping rod 32, the installation sleeve 31 is sleeved on the clamping rod 32, the clamping rod 32 is connected with the installation sleeve 31 in a sliding manner, one end of the clamping rod 32, which faces the operation block 2, is rotationally connected with a plurality of clamping blocks 33, in the embodiment of the application, three clamping blocks 33 are arranged in a circumferential array with the axis of the clamping rod 32 as the center, and the rotation axis of the clamping blocks 33 is perpendicular to the length direction of the clamping rod 32. The inner wall of the mounting sleeve 31 is provided with the clamping chute 311 for sliding the clamping block 33, the outer diameter of the clamping chute 311 is gradually decreased towards the direction away from the operating block 2, and the clamping block 33 is attached to the inner wall of the clamping chute 311, so that gaps between the three clamping blocks 33 can be controlled by controlling the sliding of the clamping rod 32 relative to the mounting sleeve 31, and therefore a workpiece can be clamped through the clamping block 33, and the cutting tool 45 is convenient for turning the workpiece.

Referring to fig. 4, a dovetail block 331 is fixedly arranged at one end of a clamping block 33 facing a clamping chute 311, a dovetail groove 312 adapted to the dovetail block 331 is formed in the clamping chute 311, and under the cooperation of the dovetail block 331 and the dovetail groove 312, the dovetail block 331 can slide in the dovetail groove 312 when the clamping block 33 slides, so that the distance between the three clamping blocks 33 can be controlled to be opened or contracted along with the sliding of a clamping rod 32, a workpiece is clamped by the clamping block 33 conveniently, and the reliability of driving the clamping block 33 to rotate by the rotation of a mounting sleeve 31 is improved. The stopper 332 has been set firmly to the one end that grip block 33 deviates from the forked tail piece 331, and the machined part all laminates with stopper 332 and grip block 33 when the grip block 33 centre gripping to the distance that restriction machined part slided towards the clamping lever 32 is convenient for cutting sword 45 can carry out turning to the machined part excircle of being held.

Referring to fig. 2, one end of the adjusting block 22 facing the cutting mechanism 12 is slidingly connected with a distance control rod 26, the distance control rod 26 is in threaded connection with one end of the operating block 2 facing the machine body 3, the distance between the distance control rod 26 and the machine body 3 is convenient to control, the sliding distance of the operating block 2 facing the machine body 3 is limited by the arrangement of the distance control rod 26, and the operating block 2 is not easy to slide to the cutting knife 45 to damage the mounting sleeve 31 and the clamping block 33.

Referring to fig. 3 and 4, the machine body 3 is provided with a control member for controlling the sliding of the clamping rod 32, the control member comprises two limiting rings 321 coaxially fixed with the clamping rod 32, the machine body 3 is rotationally connected with a control handle 34, the rotation axis of the control handle 34 is parallel to the sliding direction of the clamping rod 32, an arc-shaped block 341 is fixedly arranged at one end of the control handle 34, which faces the clamping rod 32, both ends of the arc-shaped block 341 are in threaded connection with a matching rod 342, the matching rod 342 is located between the two limiting rings 321, the matching rod 342 is attached to any one limiting ring 321 after the control handle 34 rotates, so that the clamping rod 32 can be driven to slide, and the sliding of the clamping rod 32 is controlled conveniently.

Referring to fig. 1 and 3, a rotating member for driving the mounting sleeve 31 to rotate is provided on the workbench 1, the rotating member includes a rotating motor 14, an output shaft of the rotating motor 14 is connected with the mounting sleeve 31 through a transmission belt 141, and the rotating motor 14 can rotate the mounting sleeve 31 under the action of belt transmission after being started. In actual design, a pedal plate electrically connected with the rotary motor 14 can be placed under the workbench 1, and the rotary motor 14 is started in a pedal manner, so that turning of a workpiece is further facilitated.

The implementation principle of the gear blank excircle turning device provided by the embodiment of the application is as follows: the cutting blade 45 is fixed on the mounting block 4 under the cooperation of the fixed block 44 and the pressing block 46, the positions of the adjusting plate 23 and the distance control rod 26 on the operating block 2 are adjusted, and the mounting block 4 is controlled to slide to a proper position by controlling the distance control rod 421.

The operator moves the workpiece towards the direction of the clamping rod 32 to attach the workpiece to the limiting block 332, then the control handle 34 is operated by one hand to rotate, so that the clamping rod 32 slides towards the direction away from the machine body 3 to the clamping block 33 to clamp the workpiece and keep the clamping state, then the adjusting rod 221 is operated by the other hand to rotate to drive the operating block 2 to slide towards the machine body 3, in the process, the operator drives the mounting sleeve 31 to rotate in a pedal stepping mode, and the cutting tool 45 can conduct turning on the outer circle of the workpiece.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a gear embryo car excircle device, includes workstation (1), be equipped with fixture (11) and cutting mechanism (12) that are used for carrying out turning to the machined part that are used for the centre gripping machined part on workstation (1), its characterized in that: the cutting mechanism (12) comprises a cutting knife (45) and an operating block (2) which is arranged on the workbench (1) in a sliding manner, wherein an installation component for installing the cutting knife (45) is arranged on the operating block (2), an adjusting sliding rail (13) is arranged on the workbench (1), an adjusting sliding groove (21) which is matched with the adjusting sliding rail (13) is formed in the operating block (2), and the clamping mechanism (11) is positioned on a sliding track of the operating block (2);

The workbench (1) is rotationally connected with an adjusting block (22), an adjusting plate (23) is arranged between the adjusting block (22) and the operating block (2), two ends of the adjusting plate (23) are rotationally connected with the adjusting block (22) and the operating block (2) respectively, a rotation axis of the adjusting plate (23) is eccentrically arranged compared with a rotation axis of the adjusting block (22), and an adjusting rod (221) is arranged on the side wall of the adjusting block (22).

2. The gear blank excircle turning device according to claim 1, wherein: the mounting assembly comprises a mounting block (4) which is arranged on the operation block (2) in a sliding manner, a distance adjusting slide rail (25) perpendicular to the adjusting slide rail (13) is arranged on the operation block (2), a distance adjusting slide groove (41) which is matched with the distance adjusting slide rail (25) is formed in the mounting block (4), and a fixing piece for fixing the cutting knife (45) is arranged on the mounting block (4).

3. The gear blank excircle turning device according to claim 2, wherein: the fixing piece comprises a fixing block (44) arranged on the mounting block (4), an arc-shaped groove for the cutting knife (45) to be embedded is formed in the fixing block (44), the outer wall of the cutting knife (45) is attached to the inner wall of the arc-shaped groove, a pressing block (46) is further connected onto the mounting block (4) in a sliding mode, and the pressing block (46) is matched with the fixing block (44) to tightly support the cutting knife (45) after sliding.

4. The gear blank excircle turning device according to claim 1, wherein: the utility model provides a clamping mechanism (11) is including setting up organism (3) on workstation (1), rotate on organism (3) and be connected with mount sleeve (31), coaxial clamping lever (32) that are equipped with on mount sleeve (31), clamping lever (32) are connected with mount sleeve (31) in a sliding way, clamping lever (32) are connected with a plurality of grip blocks (33) towards the one end rotation of operation piece (2), set up on the inner wall of mount sleeve (31) and be used for supplying grip block (33) gliding centre gripping spout (311), the external diameter of centre gripping spout (311) is gradually decreased towards the direction of keeping away from operation piece (2), the inner wall laminating of grip block (33) and centre gripping spout (311), be equipped with the control piece that is used for controlling clamping lever (32) to slide on organism (3), be equipped with on workstation (1) and be used for driving the pivoted piece of rotating of mount sleeve (31).

5. The gear blank excircle turning device according to claim 4, wherein: the clamping block (33) is provided with a dovetail block (331) towards one end of the clamping chute (311), a dovetail groove (312) matched with the dovetail block (331) is formed in the clamping chute (311), a limiting block (332) is arranged at one end, deviating from the dovetail block (331), of the clamping block (33), and the machined piece is attached to the limiting block (332) and the clamping block (33).

6. The gear blank excircle turning device according to claim 4, wherein: the control piece comprises two limiting rings (321) coaxially arranged on the clamping rod (32), a control handle (34) is rotationally connected to the machine body (3), an arc-shaped block (341) is arranged at one end of the control handle (34) towards the clamping rod (32), matching rods (342) are arranged at two ends of the arc-shaped block (341), the matching rods (342) are located between the two limiting rings (321), and the matching rods (342) are attached to any one limiting ring (321) after the control handle (34) rotates.

7. The gear blank excircle turning device according to claim 1, wherein: one end of the adjusting block (22) facing the cutting mechanism (12) is connected with a distance control rod (26) in a sliding mode, and one end, far away from the adjusting block (22), of the distance control rod (26) is attached to the cutting mechanism (12) after the adjusting block (22) slides.

8. The gear blank excircle turning device according to claim 2, wherein: the adjusting block (22) is connected with the adjusting plate (23) through an adjusting bolt (222), an adjusting threaded hole matched with the adjusting bolt (222) is formed in the adjusting block (22), and a plurality of adjusting through holes (24) used for the adjusting bolt (222) to penetrate are formed in the adjusting plate (23).