A clamping grinding jig for processing flat square shafts

Abstract

This invention relates to the field of flat square shaft machining technology, specifically to a clamping and grinding fixture for flat square shaft machining. It solves the problem that, when using clamping and grinding fixtures for flat square shaft machining, different sizes of flat square shafts often require different types of fixtures for clamping, which is very inconvenient. Furthermore, during grinding, the flat square shaft is prone to shaking or moving, leading to defective products. The fixture includes a base plate with two fixed rods fixedly mounted on its surface. A first slide is movably mounted at the foremost position of each fixed rod, and a second slide is movably mounted at the rear of the first slide. This invention allows adjustment of the positions of the first, second, and third slides on the surface of the fixed rods. Therefore, when installing a flat square shaft, the device can be installed in a mounting groove after adjustment according to the outer diameter and shape of the flat square shaft. This allows the device to be adapted to clamp flat square shafts of different sizes, facilitating its use.

Description

Technical Field

[0001] This invention relates to the field of flat square shaft machining technology, specifically to a clamping and grinding fixture for flat square shaft machining. Background Technology

[0002] In metal cutting, many shaft parts often have flat rectangular ends, commonly known as square shafts. Square shafts are typically used in motors, primarily for controlling the movement of car windows and seats. They are mainly used in structures such as window regulators, car lock devices, seat frames, seat adjusters and their components, cooling fan modules, and micro-motor systems. When machining square shafts, they usually need to be ground to make one or both ends of the shaft flat and rectangular. In this case, a grinding fixture is required to clamp the square shaft.

[0003] Existing clamping and grinding fixtures for machining flat square shafts often require different fixture models due to the varying sizes of the flat square shafts, which is very inconvenient. Furthermore, the other end of the flat square shaft is usually not fixed after clamping, causing it to wobble or move during grinding, resulting in defective products. Therefore, these fixtures do not meet the current requirements. To address this, we propose a clamping and grinding fixture for machining flat square shafts. Summary of the Invention

[0004] The purpose of this invention is to provide a clamping and grinding fixture for machining flat square shafts, in order to solve the problems mentioned in the background art. When using the clamping and grinding fixture for machining flat square shafts, different models of fixtures are often required for clamping due to the different sizes of the flat square shafts, which is very inconvenient. In addition, after clamping, the other end of the flat square shaft is usually not fixed, which makes it easy for the flat square shaft to shake or move during the grinding process, resulting in the production of defective products.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a clamping and grinding fixture for machining flat rectangular shafts, comprising a base plate, two fixing rods fixedly mounted on the surface of the base plate, a first slide movably mounted at the foremost position of the fixing rods, a second slide movably mounted at the rear side of the first slide, a third slide movably mounted at the rear side of the second slide, a first mating block movably mounted at the top of the first slide, a second mating block movably mounted at the top of the second slide, and a third mating block movably mounted at the top of the third slide, with two flat rectangular shafts disposed between the first slide and the first mating block. The flat rectangular shaft extends through the interior of the first slide block, the second slide block, the third slide block, the end positioning block, the first mating block, the second mating block, and the third mating block to the rear side of the third slide block and the third mating block. The top surfaces of the first slide block, the second slide block, and the third slide block are each provided with two mating grooves. The sides of the first mating block, the second mating block, and the third mating block are all fixedly installed with mating plates. The mating plates are all slidably inserted into the interior of the mating grooves. The first slide block, the second slide block, the third slide block, the end positioning block, the first mating block, the second mating block, and the third mating block are all slidably installed on the surfaces of the two fixed rods.

[0006] Preferably, an end positioning block is movably installed on the rear side of the third slide block and the third mating block. A connecting rod is fixedly installed at both ends of the end positioning block. The connecting rod is slidably installed on the outer surface of the fixed rod. Limiting bolts are movably installed on the outer side of the connecting rod. The limiting bolts penetrate the interior of the connecting rod and fit against the surface of the fixed rod.

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

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

[0009] Preferably, the first slide, the second slide, and the third slide are provided with telescopic grooves on both sides, and a movable rod is slidably installed inside each of the telescopic grooves. The first slide, the second slide, and the third slide are provided with moving grooves near the movable rods. A compression spring is movably installed on the outer surface of each movable rod. The compression spring is movably engaged inside the moving groove. One end of each movable rod extends through the inside of the telescopic groove to the inside of the mating groove.

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

[0011] Preferably, the front surface of the base plate is provided with two T-shaped grooves, and T-shaped sliders are fixedly installed on both sides of the bottom end of the first slide block, the second slide block and the third slide block, and the T-shaped sliders are slidably inserted into the interior of the T-shaped grooves.

[0012] Preferably, the top surfaces of the first slide, the second slide, and the third slide are all provided with mounting grooves, and the bottom surfaces of the first mating block, the second mating block, and the third mating block are all provided with mounting grooves, and the flat rectangular shaft is movably inserted into the interior of the mounting groove.

[0013] Preferably, both sides of the base plate surface are provided with multiple threaded holes, and both sides of the base plate are connected to a fixing platform by bolts. The top of the fixing platform is equipped with a fixing bracket by bolts. A pressure block is fixedly installed on the side of the top of the fixing bracket near the flat square shaft. The pressure block is in contact with the surfaces of the first mating block, the second mating block and the third mating block.

[0014] Preferably, the T-shaped slider is provided with balls on both sides, and the balls are in contact with the inner wall surface of the T-shaped groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention, through the cooperation of the first slide, the second slide and the third slide, allows the device to be used by adjusting the positions of the first slide, the second slide and the third slide on the surface of the fixed rod. Thus, when the device is used to install a flat square shaft, it can be installed in the mounting groove after the adjustment distance according to the outer diameter and shape of the flat square shaft. This allows the device to be adapted to the installation and clamping of flat square shafts of different sizes, making the device convenient to use.

[0017] 2. The present invention, through the cooperation of the end positioning block and the arc-shaped pressure plate, allows the rear end of the flat square shaft to be inserted into the positioning groove when the flat square shaft is installed. At this time, the flat square shaft will collide with the arc groove on the front surface of the arc-shaped pressure plate, thereby pushing the arc-shaped pressure plate to retract towards the spring groove. This allows the arc-shaped pressure plate to clamp the rear end of the flat square shaft, avoiding misalignment when clamping the flat square shaft, and thus avoiding defective products due to misalignment of the flat square shaft during grinding.

[0018] 3. This invention, through the cooperation of the mating groove and the mating plate, allows the first mating block, the second mating block, and the third mating block to be respectively fitted and installed on the top surfaces of the first slide, the second slide, and the third slide when the device is installing the flat square shaft. The mating plate is then inserted into the mating groove for positioning. After the mating plate is inserted into the mating groove, the limiting ball will pop out due to the elastic potential energy of the micro spring and get stuck inside the limiting groove. At this time, more than half of the surface of the limiting ball is located inside the limiting groove, thus preventing the first mating block, the second mating block, and the third mating block from being pulled out directly upwards. This fixes the first mating block, the second mating block, and the third mating block, thereby pressing and fixing the flat square shaft and preventing it from moving during grinding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top cross-sectional view of the entire invention;

[0021] Figure 3 This is a cross-sectional front view of the position of the end positioning block of the present invention;

[0022] Figure 4 This is a cross-sectional side view of the entire invention;

[0023] Figure 5 This is a cross-sectional side view of the position of the fixing rod in this invention;

[0024] Figure 6 For the present invention Figure 2 A partial structural diagram of part A in the middle;

[0025] Figure 7 This is a schematic diagram of the structure of the flat rectangular shaft that is processed according to the present invention.

[0026] In the diagram: 1. Base plate; 2. Fixed rod; 3. First slide block; 4. Second slide block; 5. Third slide block; 6. End positioning block; 7. First mating block; 8. Second mating block; 9. Third mating block; 10. T-shaped slide groove; 11. T-shaped slider; 12. Flat square shaft; 13. Movable rod; 14. Mating groove; 15. Mounting groove; 16. Limiting bolt; 17. Connecting rod; 18. Positioning groove; 19. Spring groove; 20. Compression spring; 21. Arc-shaped pressure plate; 22. Mating plate; 23. Telescopic groove; 24. Moving groove; 25. Compression spring; 26. Outer groove of mating plate; 27. Limiting ball; 28. Miniature spring; 29. ​​Limiting groove. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Please see Figures 1 to 7 An embodiment of the present invention provides a clamping and grinding fixture for machining flat rectangular shafts, comprising a base plate 1, two fixing rods 2 fixedly mounted on the surface of the base plate 1, a first slide 3 movably mounted at the foremost position of the fixing rods 2, a second slide 4 movably mounted at the rear side of the first slide 3, a third slide 5 movably mounted at the rear side of the second slide 4, a first mating block 7 movably mounted at the top of the first slide 3, a second mating block 8 movably mounted at the top of the second slide 4, and a third mating block 9 movably mounted at the top of the third slide 5. Two flat rectangular shafts 12 are disposed between the first slide 3 and the first mating block 7, and the flat rectangular shafts 12 penetrate the first slide 3. The interiors of the second slide block 4, the third slide block 5, the end positioning block 6, the first mating block 7, the second mating block 8, and the third mating block 9 extend to the rear side of the third slide block 5 and the third mating block 9. The top surfaces of the first slide block 3, the second slide block 4, and the third slide block 5 are each provided with two mating grooves 14. The sides of the first mating block 7, the second mating block 8, and the third mating block 9 are each fixedly installed with mating plates 22. The mating plates 22 are all slidably inserted into the interior of the mating grooves 14. The first slide block 3, the second slide block 4, the third slide block 5, the end positioning block 6, the first mating block 7, the second mating block 8, and the third mating block 9 are all slidably installed on the surfaces of the two fixed rods 2.

[0029] By cooperating with the first slide block 3, the second slide block 4, and the third slide block 5, the positions of the first slide block 3, the second slide block 4, and the third slide block 5 can be adjusted on the surface of the fixed rod 2 during use. Thus, when installing the flat square shaft 12, it can be installed in the mounting groove 15 after adjusting the distance according to the outer diameter and shape of the flat square shaft 12. This allows the device to be adapted to the installation and clamping of flat square shafts 12 of different sizes, making the device convenient to use.

[0030] The rear side of the third slide block 5 and the third mating block 9 is movably installed with an end positioning block 6. Both ends of the end positioning block 6 are fixedly installed with a connecting rod 17. The connecting rod 17 is slidably installed on the outer surface of the fixed rod 2. Limiting bolts 16 are movably installed on the outer side of the connecting rod 17. The limiting bolts 16 penetrate the interior of the connecting rod 17 and fit against the surface of the fixed rod 2.

[0031] The front surface of the end positioning block 6 is provided with two positioning grooves 18. The top and bottom of the inner wall of the positioning groove 18 are provided with spring grooves 19. The inside of the spring grooves 19 is slidably installed with arc-shaped pressure plates 21. 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 rear end surface of the flat square shaft 12. The front surface of the arc-shaped pressure plates 21 is provided with arc grooves.

[0032] By cooperating with the end positioning block 6 and the arc-shaped pressure plate 21, when installing the flat square shaft 12, the rear end of the flat square shaft 12 can be inserted into 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 towards the spring groove 19, so that the arc-shaped pressure plate 21 clamps the rear end of the flat square shaft 12, avoiding misalignment of the flat square shaft 12 during clamping, and thus avoiding defective products due to misalignment of the flat square shaft 12 during grinding.

[0033] The outer surface of the mating plate 22 is provided with a mating plate outer groove 26. A limit ball 27 is slidably installed inside the mating plate outer groove 26. A baffle is fixedly installed on the outer surface of the limit ball 27. The baffle is movably inserted into the interior of the mating plate outer groove 26. A miniature spring 28 is movably installed between the limit ball 27 and the interior of the mating plate outer groove 26.

[0034] The first slide block 3, the second slide block 4, and the third slide block 5 are all provided with telescopic grooves 23 on both sides. A movable rod 13 is slidably installed inside the telescopic groove 23. A moving groove 24 is provided inside the first slide block 3, the second slide block 4, and the third slide block 5 near the movable rod 13. A compression spring 25 is movably installed on the outer surface of the movable rod 13. The compression spring 25 is movably inserted into the moving groove 24. One end of the movable rod 13 extends through the inside of the telescopic groove 23 to the inside of the mating groove 14.

[0035] Through the cooperation of the mating groove 14 and the mating plate 22, when the device is installing the flat square shaft 12, the first mating block 7, the second mating block 8 and the third mating block 9 can be adapted and installed on the top surfaces of the first slide block 3, the second slide block 4 and the third slide block 5 respectively, and the mating plate 22 is inserted into the mating groove 14 for positioning and installation. At this time, after the mating plate 22 is inserted into the mating groove 14, the limiting ball 27 will pop out due to the elastic potential energy of the micro spring 28 and get stuck in the limiting groove 29. 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 mating block 7, the second mating block 8 and the third mating block 9 cannot be pulled out directly upwards, thereby fixing the first mating block 7, the second mating block 8 and the third mating block 9, and pressing and fixing the flat square shaft 12 to prevent the flat square shaft 12 from moving during grinding.

[0036] The inner wall of the mating groove 14 is provided with a limiting groove 29 near the movable rod 13. 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.

[0037] The front surface of the base plate 1 is provided with two T-shaped grooves 10. T-shaped sliders 11 are fixedly installed on both sides of the bottom end of the first slide block 3, the second slide block 4 and the third slide block 5. The T-shaped sliders 11 are all slidably inserted into the interior of the T-shaped grooves 10.

[0038] The top surfaces of the first slide block 3, the second slide block 4 and the third slide block 5 are all provided with mounting grooves 15, and the bottom surfaces of the first mating block 7, the second mating block 8 and the third mating block 9 are all provided with mounting grooves 15. The flat square shaft 12 is movably inserted into the interior of the mounting groove 15.

[0039] Multiple threaded holes are provided on both sides of the base plate 1. Fixed platforms are connected to both sides of the base plate 1 by bolts. Fixed brackets are installed on the top of the fixed platforms by bolts. Pressure blocks are fixedly installed on the side of the top of the fixed brackets near the flat square shaft 12. The pressure blocks are in contact with the surfaces of the first mating block 7, the second mating block 8 and the third mating block 9.

[0040] Both sides of the T-shaped slider 11 are provided with ball bearings, which are in contact with the inner wall surface of the T-shaped groove 10.

[0041] When using this grinding fixture for machining flat rectangular shafts, the positions of the first slide block 3, the second slide block 4, and the third slide block 5 are first adjusted on the surface of the fixed rod 2. This allows the fixture to install the flat rectangular shaft 12 within the adjusted mounting groove 15, based on the shaft's outer diameter and shape. This enables the fixture to accommodate flat rectangular shafts 12 of different sizes, facilitating its use.

[0042] When installing the flat square shaft 12, the rear end of the flat square shaft 12 can be inserted into 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 back towards the spring groove 19. This allows the arc-shaped pressure plate 21 to clamp the rear end of the flat square shaft 12, preventing misalignment during clamping and thus avoiding defective products due to misalignment of the flat square shaft 12 during grinding.

[0043] When installing the flat rectangular shaft 12, the first mating block 7, the second mating block 8, and the third mating block 9 can be adapted and installed on the top surfaces of the first slide block 3, the second slide block 4, and the third slide block 5, respectively. The mating plate 22 is then inserted into the mating groove 14 for positioning. After the mating plate 22 is inserted into the mating groove 14, the limiting ball 27 will spring out due to the elastic potential energy of the miniature spring 28 and become lodged inside the limiting groove 29. At this point, more than half of the surface of the limiting ball 27 is located inside the limiting groove 29, preventing the first mating block 7, the second mating block 8, and the third mating block 9 from being pulled upwards directly. This fixes the first mating block 7, the second mating block 8, and the third mating block 9, thereby pressing and fixing the flat rectangular shaft 12 to prevent movement during grinding.

[0044] When it is necessary to remove the first mating block 7, the second mating block 8, and the third mating block 9, the movable rods 13 on both sides of the first slide block 3, the second slide block 4, and the third slide block 5 can be pressed inwards. This causes the movable rods 13 to push the limiting ball 27, causing the limiting ball 27 to retract into the interior 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. When the first mating block 7, the second mating block 8, and the third mating block 9 are pulled upwards, the mating plate 22 will move upwards, causing the arc surface of the outer surface of the limiting ball 27 to contact the inner wall of the mating groove 14, thereby causing it to retract completely into the interior of the outer groove 26 of the mating plate. Then, the first mating block 7, the second mating block 8, and the third mating block 9 can be pulled upwards, completing the removal of the first mating block 7, the second mating block 8, and the third mating block 9, and the flat square shaft 12 can then be replaced.

[0045] It will be apparent to those skilled in the art that the present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A clamping and grinding fixture for machining flat square shafts, comprising a base plate (1), characterized in that: Two fixing rods (2) are fixedly installed on the surface of the base plate (1). A first slide (3) is movably installed at the foremost position of the fixing rod (2). A second slide (4) is movably installed at the rear side of the first slide (3). A third slide (5) is movably installed at the rear side of the second slide (4). A first mating block (7) is movably installed at the top of the first slide (3). A second mating block (8) is movably installed at the top of the second slide (4). A third mating block (9) is movably installed at the top of the third slide (5). Two flat rectangular shafts (12) are provided between the first slide (3) and the first mating block (7). The flat rectangular shafts (12) pass through the first slide (3), the second slide (4), the third slide (5), and the end fixing rods (12). The interior of the positioning block (6), the first mating block (7), the second mating block (8) and the third mating block (9) extends to the rear side of the third slide block (5) and the third mating block (9). The top surfaces of the first slide block (3), the second slide block (4) and the third slide block (5) are provided with two mating grooves (14). The sides of the first mating block (7), the second mating block (8) and the third mating block (9) are fixedly installed with mating plates (22). The mating plates (22) are slidably inserted into the interior of the mating grooves (14). The first slide block (3), the second slide block (4), the third slide block (5), the end positioning block (6), the first mating block (7), the second mating block (8) and the third mating block (9) are slidably installed on the surfaces of the two fixed rods (2). The outer surface of each mating plate (22) is provided with a mating plate outer groove (26). A limiting ball (27) is slidably installed inside the mating plate outer groove (26). A baffle is fixedly installed on the outer surface of the limiting ball (27). The baffle is movably inserted into the interior of the mating plate outer groove (26). A miniature spring (28) is movably installed between the limiting ball (27) and the interior of the mating plate outer groove (26). The first slide (3), the second slide (4) and the third slide (5) are provided with telescopic grooves (23) on both sides. A movable rod (13) is slidably installed inside the telescopic groove (23). A moving groove (24) is provided inside the first slide (3), the second slide (4) and the third slide (5) near the movable rod (13). A compression spring (25) is movably installed on the outer surface of the movable rod (13). The compression spring (25) is movably inserted into the moving groove (24). One end of the movable rod (13) extends through the inside of the telescopic groove (23) to the inside of the mating groove (14). The inner wall of the mating groove (14) near the movable rod (13) is provided with a limiting groove (29). The limiting ball (27) is inserted into the inside of the limiting groove (29). The inner diameter of the limiting groove (29) is two-thirds of the outer diameter of the limiting ball (27).

2. The clamping and grinding fixture for machining a flat square shaft according to claim 1, characterized in that: The rear side of the third slide block (5) and the third mating block (9) is movably installed with an end positioning block (6). Both ends of the end positioning block (6) are fixedly installed with connecting rods (17). The connecting rods (17) are slidably installed on the outer surface of the fixed rod (2). Limiting bolts (16) are movably installed on the outer side of the connecting rods (17). The limiting bolts (16) penetrate the interior of the connecting rods (17) and fit against the surface of the fixed rod (2).

3. The clamping and grinding fixture for machining a flat square shaft according to claim 1, characterized in that: The front surface of the end positioning block (6) is provided with two positioning grooves (18). The top and bottom of the inner wall of the positioning groove (18) are provided with spring grooves (19). Arc-shaped pressure plates (21) are slidably installed inside the spring grooves (19). 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 rear end surface of the flat square shaft (12). The front surface of the arc-shaped pressure plates (21) is provided with a circular arc groove.

4. The clamping and grinding fixture for machining a flat square shaft according to claim 1, characterized in that: The front surface of the base plate (1) is provided with two T-shaped grooves (10). T-shaped sliders (11) are fixedly installed on both sides of the bottom end of the first slide block (3), the second slide block (4) and the third slide block (5). The T-shaped sliders (11) are all slidably inserted into the interior of the T-shaped grooves (10).

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

6. The clamping and grinding fixture for machining a flat square shaft according to claim 1, characterized in that: The base plate (1) has multiple threaded holes on both sides of its surface. Both sides of the base plate (1) are connected to a fixed platform by bolts. The top of the fixed platform is equipped with a fixed bracket by bolts. A pressure block is fixedly installed on the side of the top of the fixed bracket near the flat square shaft (12). The pressure block is in contact with the surfaces of the first mating block (7), the second mating block (8), and the third mating block (9).

7. A clamping and grinding fixture for machining a flat square shaft according to claim 4, characterized in that: Both sides of the T-shaped slider (11) are provided with balls, and the balls are in contact with the inner wall surface of the T-shaped groove (10).

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