Clamping and grinding jig for flat square shaft machining

Abstract

The invention relates to the technical field of flat and square shaft machining, in particular to a clamping and grinding jig for flat and square shaft machining, and solves the problems that when a clamping and grinding jig for flat and square shaft machining is used, jigs of different models need to be used for clamping due to different sizes of flat and square shafts, the clamping and grinding jig is very inconvenient, and in the grinding process, the clamping and grinding efficiency is high. The device comprises a bottom plate, two fixing rods are fixedly installed on the surface of the bottom plate, a first sliding seat is movably installed at the forefront positions of the fixing rods, and a second sliding seat is movably installed on the rear side of the first sliding seat. By adjusting the positions of the first sliding seat, the second sliding seat and the third sliding seat on the surface of the fixing rod, when the device is used for mounting the flat square shaft, the flat square shaft can be mounted in the mounting groove with the distance adjusted according to the outer diameter size and shape of the flat square shaft, so that the device can adapt to mounting and clamping of flat square shafts of different sizes, and the device is convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of flat square shaft processing, in particular to a clamping grinding jig for flat square shaft processing. Background Art

[0002] In metal cutting processing, the two ends of many shaft parts are often flat and square, which are commonly called flat square shafts. Flat square shafts are usually used in motors and are mainly used in the movement control of car windows and seats. They are mainly used in structures such as glass lifters, car locking devices, seat frames, seat adjusters and their components, cooling fan modules, and micromotor systems. When processing flat square shafts, they usually need to be ground so that both ends or one end of the shaft is ground into a flat square shape. At this time, a grinding fixture is needed to clamp the flat square shaft.

[0003] When using the existing clamping and grinding jigs for processing flat square shafts, different types of jigs are often needed for clamping due to the different sizes of the flat square shafts, which is very inconvenient. In addition, the flat square shaft is usually not fixed at the other end after clamping, which causes the flat square shaft to shake or move easily during the grinding process, resulting in defective products. Therefore, it does not meet the existing needs. In this regard, we propose a clamping and grinding jig for processing flat square shafts. Summary of the invention

[0004] The purpose of the present invention is to provide a clamping and grinding jig for processing a flat square shaft, so as to solve the problem that the clamping and grinding jig for processing a flat square shaft proposed in the above-mentioned background technology often requires the use of different types of jigs for clamping due to the different sizes of the flat square shaft, which is very inconvenient, and the other end of the flat square shaft is usually not fixed after clamping, resulting in the flat square shaft shaking or moving easily during the grinding process, resulting in the output of defective products.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a clamping and grinding jig for processing flat square shafts, comprising a base plate, two fixed rods are fixedly installed on the surface of the base plate, a first slide is movably installed at the frontmost position of the fixed rod, a second slide is movably installed at the rear side of the first slide, a third slide is movably installed at the rear side of the second slide, a first matching block is movably installed at the top end of the first slide, a second matching block is movably installed at the top end of the second slide, a third matching block is movably installed at the top end of the third slide, two flat square shafts are arranged between the first slide and the first matching block, The flat square shaft passes through the first slide, the second slide, the third slide, the end positioning block, the first matching block, the second matching block and the third matching block, and extends to the rear side of the third slide and the third matching block. The top surfaces of the first slide, the second slide and the third slide are each provided with two matching grooves, and matching plates are fixedly installed on both sides of the first matching block, the second matching block and the third matching block, and the matching plates are slidably inserted into the interior of the matching grooves, and the first slide, the second slide, the third slide, the end positioning block, the first matching block, the second matching block and the third matching block are all slidably installed on the surfaces of the two fixed rods.

[0006] Preferably, end positioning blocks are movably installed on the rear sides of the third sliding seat and the third matching block, connecting rods are fixedly installed on both ends of the end positioning blocks, the connecting rods are slidably installed on the outer surface of the fixed rod, and limiting bolts are movably installed on the outer side of the connecting rods, and the limiting bolts pass through the interior of the connecting rod and fit into the surface of the fixed rod.

[0007] Preferably, the front surface of the end positioning block is provided with two positioning grooves, the top and bottom ends of the inner wall of the positioning groove are provided with spring grooves, the inside of the spring grooves are slidably installed with arc-shaped pressure plates, and compression springs are movably installed between the arc-shaped pressure plates and the inside of the spring grooves, the surface of the arc-shaped pressure plates is in contact with the surface of one end of the flat square shaft on the rear side, and the front surface of the arc-shaped pressure plate is provided with an arc groove.

[0008] Preferably, the outer surface of the mating plate is provided with an outer groove of the mating plate, and a limiting ball is slidably installed inside the outer groove of the mating plate. A baffle is fixedly installed on the outer surface of the limiting ball, and the baffle is movably inserted into the inner part of the outer groove of the mating plate. A micro spring is movably installed between the limiting ball and the inner part of the outer groove of the mating plate.

[0009] Preferably, telescopic grooves are provided on both side surfaces of the first slide seat, the second slide seat and the third slide seat, movable rods are slidably installed inside the telescopic grooves, movable grooves are provided near the movable rods inside the first slide seat, the second slide seat and the third slide seat, extrusion springs are movably installed on the outer surfaces of the movable rods, the extrusion springs are movably inserted into the interior of the movable grooves, and one end of the movable rods passes through the interior of the telescopic grooves and extends to the interior of the matching grooves.

[0010] Preferably, a limiting groove is provided on the inner wall of the matching groove near the movable rod, the limiting ball is movably inserted into the limiting groove, and the inner diameter of the limiting groove is two-thirds of the outer diameter of the limiting ball.

[0011] Preferably, two T-shaped slide grooves are provided on the front side surface of the bottom plate, and T-shaped sliding blocks are fixedly installed on both sides of the bottom ends of the first slide, the second slide and the third slide, and the T-shaped sliding blocks are slidably inserted into the interior of the T-shaped slide grooves.

[0012] Preferably, the top surfaces of the first slide seat, the second slide seat and the third slide seat are all provided with mounting grooves, the bottom surfaces of the first matching block, the second matching block and the third matching block are all provided with mounting grooves, and the flat square shafts are all movably inserted into the interior of the mounting grooves.

[0013] Preferably, a plurality of threaded holes are provided on both sides of the surface of the base plate, and a fixing platform is connected to both sides of the base plate by bolts, and a fixing bracket is installed on the top of the fixing platform by bolts, and a pressure block is fixedly installed on one side of the top of the fixing bracket close to the flat square axis, and the pressure block is fitted with the surfaces of the first matching block, the second matching block and the third matching block.

[0014] Preferably, balls are provided on both sides of the T-shaped sliding block, and the balls are fitted with the inner wall surface of the T-shaped sliding groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the first slide seat, the second slide seat and the third slide seat so that when the device is in use, the positions of the first slide seat, the second slide seat and the third slide seat can be adjusted on the surface of the fixed rod. When the device is installing the flat square shaft, it can be installed in the installation groove after the distance is adjusted according to the outer diameter size and shape of the flat square shaft, so that the device can be adapted to the installation and clamping of flat square shafts of different sizes, which is convenient for the use of the device; 2. The present invention cooperates with the end positioning block and the arc-shaped pressing plate, so that when the device is installing the flat square shaft, the rear end of the flat square shaft can be inserted into the interior of the positioning groove. At this time, the flat square shaft will collide with the arc groove on the front surface of the arc-shaped pressing plate, so that it pushes the arc-shaped pressing plate to retract in the direction of the spring groove, so that the arc-shaped pressing plate clamps the rear end of the flat square shaft, avoiding the misalignment of the flat square shaft when clamping, and thus avoiding the defective product caused by the misalignment of the flat square shaft during grinding; 3. The present invention cooperates with the matching groove and the matching plate. When the device is installing the flat square shaft, the first matching block, the second matching block and the third matching block can be respectively adapted and installed on the top surfaces of the first slide seat, the second slide seat and the third slide seat, and the matching plate is inserted into the matching groove to position and install it. At this time, after the matching plate is inserted into the matching groove, the limiting ball will pop out and get stuck into the limiting groove due to the elastic potential energy of the micro spring. At this time, more than half of the surface of the limiting ball is located in the limiting groove, so that the first matching block, the second matching block and the third matching block cannot be pulled out directly upward at this time, thereby fixing the first matching block, the second matching block and the third matching block, and then pressing and fixing the flat square shaft to avoid the movement of the flat square shaft during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A cross-sectional top view of the present invention as a whole; Figure 3 It is a cross-sectional front view of the position of the end positioning block of the present invention; Figure 4 A sectional side view of the present invention as a whole; Figure 5 is a cross-sectional side view of the position of the fixing rod of the present invention; Figure 6 For the present invention Figure 2 Schematic diagram of the local structure of part A; Figure 7 It is a schematic structural diagram of a flat square shaft processed part according to the present invention.

[0017] In the figure: 1. bottom plate; 2. fixing rod; 3. first slide seat; 4. second slide seat; 5. third slide seat; 6. end positioning block; 7. first matching block; 8. second matching block; 9. third matching block; 10. T-shaped slide groove; 11. T-shaped slider; 12. flat square shaft; 13. movable rod; 14. matching groove; 15. mounting groove; 16. limiting bolt; 17. connecting rod; 18. positioning groove; 19. spring groove; 20. compression spring; 21. arc pressure plate; 22. matching plate; 23. telescopic groove; 24. moving groove; 25. extrusion spring; 26. outer groove of matching plate; 27. limiting ball; 28. micro spring; 29. ​​limiting groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1 to 7An embodiment of the present invention is as follows: a clamping and grinding jig for processing a flat square shaft comprises a base plate 1, two fixed rods 2 are fixedly installed on the surface of the base plate 1, a first slide seat 3 is movably installed at the frontmost position of the fixed rod 2, a second slide seat 4 is movably installed at the rear side of the first slide seat 3, a third slide seat 5 is movably installed at the rear side of the second slide seat 4, a first matching block 7 is movably installed at the top end of the first slide seat 3, a second matching block 8 is movably installed at the top end of the second slide seat 4, a third matching block 9 is movably installed at the top end of the third slide seat 5, two flat square shafts 12 are arranged between the first slide seat 3 and the first matching block 7, and the flat square shaft 12 passes through the first slide seat 3, The interiors of the second slide 4, the third slide 5, the end positioning block 6, the first matching block 7, the second matching block 8 and the third matching block 9 extend to the rear sides of the third slide 5 and the third matching block 9, and the top surfaces of the first slide 3, the second slide 4 and the third slide 5 are each provided with two matching grooves 14, and matching plates 22 are fixedly installed on both sides of the first matching block 7, the second matching block 8 and the third matching block 9, and the matching plates 22 are slidably inserted into the interior of the matching grooves 14, and the first slide 3, the second slide 4, the third slide 5, the end positioning block 6, the first matching block 7, the second matching block 8 and the third matching block 9 are all slidably installed on the surfaces of the two fixed rods 2.

[0020] Through the cooperation of the first slide 3, the second slide 4 and the third slide 5, when the device is in use, the positions of the first slide 3, the second slide 4 and the third slide 5 can be adjusted on the surface of the fixed rod 2, so that when the device is installing the flat square shaft 12, it can be installed in the installation groove 15 after the distance is adjusted according to the outer diameter size and shape of the flat square shaft 12, so that the device can adapt to the installation and clamping of flat square shafts 12 of different sizes, which is convenient for the use of the device.

[0021] An end positioning block 6 is movably installed on the rear side of the third slide seat 5 and the third matching block 9, and connecting rods 17 are fixedly installed on both ends of the end positioning block 6. The connecting rod 17 is slidably installed on the outer surface of the fixed rod 2, and limiting bolts 16 are movably installed on the outer side of the connecting rod 17. The limiting bolts 16 all penetrate the interior of the connecting rod 17 and fit the surface of the fixed rod 2.

[0022] Two positioning grooves 18 are provided on the front side surface of the end positioning block 6, and spring grooves 19 are provided at the top and bottom ends of the inner wall of the positioning groove 18. Arc-shaped pressure plates 21 are slidably installed inside the spring grooves 19, and compression springs 20 are movably installed between the arc-shaped pressure plates 21 and the inside of the spring grooves 19. The surface of the arc-shaped pressure plates 21 is in contact with the surface of one end of the flat square shaft 12 on the rear side, and an arc groove is provided on the front side surface of the arc-shaped pressure plates 21.

[0023] Through the cooperation of the end positioning block 6 and the arc-shaped pressure plate 21, when the device is installing the flat square shaft 12, the rear end of the flat square shaft 12 can be inserted into the interior of the positioning groove 18. At this time, the flat square shaft 12 will collide with the arc groove on the front surface of the arc-shaped pressure plate 21, thereby pushing the arc-shaped pressure plate 21 to retract in the direction of the spring groove 19, so that the arc-shaped pressure plate 21 clamps the rear end of the flat square shaft 12, avoiding the misalignment of the flat square shaft 12 when clamping, and further avoiding the occurrence of defective products due to the misalignment of the flat square shaft 12 during grinding.

[0024] The outer surface of the matching plate 22 is provided with a matching plate outer groove 26, and the inner part of the matching plate outer groove 26 is slidably installed with a limiting ball 27, and the outer surface of the limiting ball 27 is fixedly installed with a baffle, which is movably inserted into the inner part of the matching plate outer groove 26, and a micro spring 28 is movably installed between the limiting ball 27 and the inner part of the matching plate outer groove 26.

[0025] Telescopic grooves 23 are provided on both side surfaces of the first slide 3, the second slide 4 and the third slide 5, and movable rods 13 are slidably installed inside the telescopic grooves 23. Moving grooves 24 are provided near the movable rods 13 inside the first slide 3, the second slide 4 and the third slide 5. Extrusion springs 25 are movably installed on the outer surfaces of the movable rods 13. The extrusion springs 25 are movably inserted into the inside of the moving grooves 24, and one end of the movable rods 13 passes through the inside of the telescopic grooves 23 and extends to the inside of the matching grooves 14.

[0026] Through the cooperation between the matching groove 14 and the matching plate 22, when the device is installing the flat square shaft 12, the first matching block 7, the second matching block 8 and the third matching block 9 can be respectively adapted and installed on the top surfaces of the first slide 3, the second slide 4 and the third slide 5, and the matching plate 22 is inserted into the inside of the matching groove 14 to position and install it. At this time, after the matching plate 22 is inserted into the inside of the matching groove 14, the limiting ball 27 will pop out and be stuck into the inside of the limiting groove 29 due to the elastic potential energy of the micro spring 28. At this time, more than half of the surface of the limiting ball 27 is located inside the limiting groove 29, so that the first matching block 7, the second matching block 8 and the third matching block 9 cannot be directly pulled out upwards at this time, thereby fixing the first matching block 7, the second matching block 8 and the third matching block 9, and then pressing and fixing the flat square shaft 12 to avoid the movement of the flat square shaft 12 during grinding.

[0027] A limiting groove 29 is provided on the inner wall of the matching groove 14 near the movable rod 13 , and the limiting ball 27 is movably inserted into the limiting groove 29 . The inner diameter of the limiting groove 29 is two-thirds of the outer diameter of the limiting ball 27 .

[0028] Two T-shaped slide grooves 10 are provided on the front side surface of the bottom plate 1 , and T-shaped sliders 11 are fixedly installed on both sides of the bottom ends of the first slide 3 , the second slide 4 and the third slide 5 , and the T-shaped sliders 11 are slidably inserted into the interior of the T-shaped slide grooves 10 .

[0029] The top surfaces of the first slide 3, the second slide 4 and the third slide 5 are all provided with mounting grooves 15, the bottom surfaces of the first matching block 7, the second matching block 8 and the third matching block 9 are all provided with mounting grooves 15, and the flat square shafts 12 are all movably inserted into the interior of the mounting grooves 15.

[0030] There are multiple threaded holes on both sides of the surface of the base plate 1, and both sides of the base plate 1 are connected with fixed platforms by bolts. The top of the fixed platform is installed with a fixed bracket by bolts, and a pressure block is fixedly installed on one side of the top of the fixed bracket close to the flat square shaft 12, and the pressure block is fitted with the surface of the first matching block 7, the second matching block 8 and the third matching block 9.

[0031] Ball bearings are disposed on both sides of the T-shaped sliding block 11 , and the balls are fitted to the inner wall surface of the T-shaped sliding groove 10 .

[0032] When the flat square shaft processing clamping and grinding jig is used, the positions of the first slide seat 3, the second slide seat 4 and the third slide seat 5 are adjusted on the surface of the fixed rod 2. When the device is installed with the flat square shaft 12, it can be installed in the installation groove 15 after the distance is adjusted according to the outer diameter size and shape of the flat square shaft 12, so that the device can be adapted to the installation and clamping of flat square shafts 12 of different sizes, which is convenient for the use of the device. When the device is installing the flat square shaft 12, the rear end of the flat square shaft 12 can be inserted into the interior of the positioning groove 18. At this time, the flat square shaft 12 will collide with the arc groove on the front surface of the arc-shaped pressing plate 21, so that it pushes the arc-shaped pressing plate 21 to retract in the direction of the spring groove 19, so that the arc-shaped pressing plate 21 clamps the rear end of the flat square shaft 12, avoiding the situation that the flat square shaft 12 is not aligned when clamping, and thus avoiding the situation that the flat square shaft 12 is not aligned during grinding and causing defects. When the device is installing the flat square shaft 12, the first matching block 7, the second matching block 8 and the third matching block 9 can be respectively adapted and installed on the top surfaces of the first slide seat 3, the second slide seat 4 and the third slide seat 5, and the matching plate 22 is inserted into the inside of the matching groove 14 to position and install it. At this time, after the matching plate 22 is inserted into the inside of the matching groove 14, the limiting ball 27 will pop out and get stuck into the inside of the limiting groove 29 due to the elastic potential energy of the micro spring 28. At this time, more than half of the surface of the limiting ball 27 is located inside the limiting groove 29, so that the first matching block 7, the second matching block 8 and the third matching block 9 cannot be directly pulled out upwards at this time, thereby fixing the first matching block 7, the second matching block 8 and the third matching block 9, and then pressing and fixing the flat square shaft 12 to avoid the flat square shaft 12 moving during grinding. When the first mating block 7, the second mating block 8 and the third mating block 9 need to be removed, the movable rods 13 on both sides of the first slide 3, the second slide 4 and the third slide 5 can be pressed inwardly so that the movable rods 13 push the limiting ball 27 to retract the limiting ball 27 to the inside of the outer groove 26 of the mating plate. At this time, more than half of the surface of the limiting ball 27 is located inside the outer groove 26 of the mating plate. At this time, when the first mating block 7, the second mating block 8 and the third mating block 9 are pulled upward, the mating plate 22 will move upward, and the arc surface of the outer surface of the limiting ball 27 will contact the inner wall of the mating groove 14, so that it will completely retract to the inside of the outer groove 26 of the mating plate, and then the first mating block 7, the second mating block 8 and the third mating block 9 can be pulled upward, completing the removal of the first mating block 7, the second mating block 8 and the third mating block 9, and then the flat square shaft 12 can be replaced.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A clamping and grinding jig for machining a flat square shaft, comprising a base plate (1), characterized in that: Two fixing rods (2) are fixedly mounted on the surface of the bottom plate (1); a first slide seat (3) is movably mounted at the frontmost position of the fixing rod (2); a second slide seat (4) is movably mounted on the rear side of the first slide seat (3); a third slide seat (5) is movably mounted on the rear side of the second slide seat (4); a first matching block (7) is movably mounted on the top of the first slide seat (3); a second matching block (8) is movably mounted on the top of the second slide seat (4); a third matching block (9) is movably mounted on the top of the third slide seat (5); two flat square shafts (12) are arranged between the first slide seat (3) and the first matching block (7); the flat square shafts (12) penetrate the first slide seat (3), the second slide seat (4), the third slide seat (5), and the end fixing block (7); The interior of the positioning block (6), the first matching block (7), the second matching block (8) and the third matching block (9) extends to the rear side of the third slide seat (5) and the third matching block (9); the top surfaces of the first slide seat (3), the second slide seat (4) and the third slide seat (5) are each provided with two matching grooves (14); matching plates (22) are fixedly mounted on both sides of the first matching block (7), the second matching block (8) and the third matching block (9); the matching plates (22) are slidably inserted into the interior of the matching grooves (14); the first slide seat (3), the second slide seat (4), the third slide seat (5), the end positioning block (6), the first matching block (7), the second matching block (8) and the third matching block (9) are all slidably mounted on the surfaces of the two fixed rods (2).

2. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: An end positioning block (6) is movably mounted on the rear side of the third sliding seat (5) and the third matching block (9), and connecting rods (17) are fixedly mounted on both ends of the end positioning block (6). The connecting rod (17) is slidably mounted on the outer surface of the fixed rod (2), and limiting bolts (16) are movably mounted on the outer side of the connecting rod (17). The limiting bolts (16) penetrate the interior of the connecting rod (17) and fit the surface of the fixed rod (2).

3. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: The front side surface of the end positioning block (6) is provided with two positioning grooves (18), the top and bottom ends of the inner wall of the positioning groove (18) are provided with spring grooves (19), the inside of the spring groove (19) is slidably installed with an arc-shaped pressure plate (21), and a compression spring (20) is movably installed between the arc-shaped pressure plate (21) and the inside of the spring groove (19), the surface of the arc-shaped pressure plate (21) is in contact with the rear end surface of the flat square shaft (12), and the front side surface of the arc-shaped pressure plate (21) is provided with an arc groove.

4. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: The outer surface of the matching plate (22) is provided with a matching plate outer groove (26), the interior of the matching plate outer groove (26) is slidably mounted with a limiting ball (27), the outer surface of the limiting ball (27) is fixedly mounted with a baffle, the baffle is movably snapped into the interior of the matching plate outer groove (26), and a micro spring (28) is movably mounted between the limiting ball (27) and the interior of the matching plate outer groove (26).

5. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: Telescopic grooves (23) are provided on both side surfaces of the first slide seat (3), the second slide seat (4) and the third slide seat (5), and movable rods (13) are slidably installed inside the telescopic grooves (23). Moving grooves (24) are provided near the movable rods (13) inside the first slide seat (3), the second slide seat (4) and the third slide seat (5), and extrusion springs (25) are movably installed on the outer surfaces of the movable rods (13). The extrusion springs (25) are movably inserted into the movable grooves (24), and one end of the movable rods (13) passes through the interior of the telescopic grooves (23) and extends to the interior of the matching grooves (14).

6. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: A limiting groove (29) is provided on the inner wall of the matching groove (14) near the movable rod (13), and the limiting ball (27) is movably inserted into the limiting groove (29). The inner diameter of the limiting groove (29) is two-thirds of the outer diameter of the limiting ball (27).

7. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: The front surface of the bottom plate (1) is provided with two T-shaped slide grooves (10), and both sides of the bottom ends of the first slide seat (3), the second slide seat (4) and the third slide seat (5) are fixedly mounted with T-shaped sliding blocks (11), and the T-shaped sliding blocks (11) are slidably inserted into the interior of the T-shaped slide grooves (10).

8. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: The top surfaces of the first slide seat (3), the second slide seat (4) and the third slide seat (5) are all provided with mounting grooves (15); the bottom surfaces of the first matching block (7), the second matching block (8) and the third matching block (9) are all provided with mounting grooves (15); and the flat square shafts (12) are all movably snapped into the interior of the mounting grooves (15).

9. The clamping and grinding jig for processing a flat square shaft according to claim 1 is characterized in that: A plurality of threaded holes are provided on both sides of the surface of the bottom plate (1), and a fixing platform is connected to both sides of the bottom plate (1) by bolts. A fixing bracket is installed on the top of the fixing platform by bolts, and a pressure block is fixedly installed on one side of the top of the fixing bracket close to the flat square shaft (12), and the pressure block is in contact with the surfaces of the first matching block (7), the second matching block (8) and the third matching block (9).

10. The clamping and grinding jig for processing a flat square shaft according to claim 7, characterized in that: Ball bearings are provided on both sides of the T-shaped sliding block (11), and the balls are fitted to the inner wall surface of the T-shaped sliding groove (10).

Images