Clamping device for grinding outer surface of transmission shaft retainer

Abstract

The utility model relates to a clamping device for grinding an outer shape surface of a transmission shaft retainer in a car constant velocity universal joint, which comprises a connecting plate, a magnetizer, a machine tool body, a main shaft of a machine tool, a clamping assembly A and a clamping assembly B. The connecting plate is fixedly connected with the machine tool body, an arc notch is arranged on the connecting plate, the magnetizer is positioned in the arc notch, the magnetizer is fixedly connected with the main shaft of the machine tool, and the clamping assembly A and the clamping assembly B are arranged on the connecting plate. The clamping assembly A comprises a supporting rod A, a screw D, a rotating shaft A, a supporting head A and an alloy block A. The clamping assembly B comprises a supporting rod B, a screw C, a rotating shaft B, a supporting head B and an alloy block B. The supporting head A and the supporting head B rotate around the rotating shaft A and the rotating shaft B on the supporting rod A and the supporting rod B correspondingly, so that the alloy block A and the alloy block B make full contact with the appearance face of the retainer. The grinding precision of the retainer is ensured, meanwhile, it is ensured that the grinding device is convenient to adjust, and the grinding precision and working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to a clamping device for grinding the outer surface of a transmission shaft retainer, belonging to the field of clamps for grinding. Background Art

[0002] The drive shaft of a car's constant velocity universal joint consists of a fixed end joint, an intermediate shaft, and a movable end joint. The fixed end joint is directly connected to the car's wheel hub, while the movable end joint is directly connected to the engine's differential. The engine's power is transmitted to the wheel through the differential, movable end joint, intermediate shaft, fixed end joint, and wheel hub, thereby driving the wheel's rotation. The fixed end joint primarily consists of an outer ring, a retainer, an inner ring, and steel balls; the movable end joint primarily consists of an outer sleeve, a retainer, an inner sleeve, and steel balls. The retainer's outer surface mates with the inner surface of the outer ring or outer sleeve, requiring high precision. This means that not only does the center distance of the outer surface require high precision, but the contour and surface roughness of the outer surface also require high precision. If the outer surface precision is unsatisfactory, the retainer will easily wear, shortening its service life and causing abnormal noise. In the past, the fixture used for grinding the cage's outer surface was designed so that the flat surfaces of the horizontal and vertical alloy blocks contacted the cage's outer surface. The vertical alloy block was fixed and could not rotate. This clamping method was inconvenient to adjust and the support was unstable, which easily led to the center dimension of the cage's outer surface being out of tolerance. The contact between the alloy block and the cage's outer surface was also very likely to scratch the cage's outer surface, failing to meet high precision requirements. Therefore, a clamping device that can be easily adjusted during cage outer surface grinding and can ensure the grinding accuracy of the cage's outer surface is urgently needed at the processing site. Summary of the Invention

[0003] The purpose of the utility model is to provide a clamping device for grinding the outer surface of a transmission shaft retainer. Using this technology, when grinding the outer surface of the retainer, the clamping device can be easily adjusted, the support stability can be improved, and the grinding accuracy of the outer surface of the retainer can be guaranteed.

[0004] The technical solution of the present utility model is: a clamping device for grinding the outer surface of a transmission shaft retainer, comprising a connecting plate, a magnet, a machine tool body, a main shaft of the machine tool, a clamping assembly A, and a clamping assembly B. The connecting plate is fixedly connected to the machine tool body, and an arc notch is provided on the connecting plate. The magnet is located in the arc notch, and the magnet is fixedly connected to the main shaft of the machine tool. The clamping assembly A comprises a support rod A, a screw D, a rotating shaft A, a support head A, and an alloy block A. The support rod A is mounted on the connecting plate, and a through slot A is provided on the support rod A. The screw D passes through the through slot A on the support rod A and is fixedly connected to the connecting plate. The upper end of the support rod A is fixedly connected to the rotating shaft A, and the support head A is rotatably connected to the rotating shaft A. On the top, the support head A is fixedly connected to the alloy block A, a notch A is opened on the alloy block A, and a contact surface A that matches and is opposite to the outer surface of the retaining frame is provided on the alloy block A; the clamping assembly B includes a support rod B, a screw C, a rotating shaft B, a support head B, and an alloy block B. The support rod B is installed on the connecting plate, a through slot B is opened on the support rod B, the screw C passes through the through slot B on the support rod B and is fixedly connected to the connecting plate, the upper end of the support rod B is fixedly connected to the rotating shaft B, the support head B is rotatably connected to the rotating shaft B, the support head B is fixedly connected to the alloy block B, a notch B is opened on the alloy block B, and a contact surface B that matches and is opposite to the outer surface of the retaining frame is provided on the alloy block B.

[0005] The support head A is equipped with a screw B, the support rod A is provided with a blind hole A, the blind hole A is equipped with a spring A, the spring A is opposite to the screw B, the support head B is equipped with a screw G, the support rod B is provided with a blind hole B, the blind hole B is equipped with a spring B, the spring B is opposite to the screw G.

[0006] The connecting plate is provided with an arcuate T-shaped slot in the horizontal direction, and the screw C passes through the through slot B on the supporting rod B and is fixedly connected to the arcuate T-shaped slot.

[0007] There are two arc-shaped T-shaped grooves.

[0008] The principle of the present invention is as follows: support head A and support head B can rotate around rotation axis A and rotation axis B on support rod A and support rod B respectively, so that alloy blocks A and alloy blocks B are in full contact with the outer surface of the retainer, and springs A and springs B on support rod A and support rod B make alloy blocks A and alloy blocks B closely adhere to the outer surface of the retainer. At the same time, contact surfaces A and contact surfaces B on alloy blocks A and alloy blocks B that are consistent with the outer surface of the retainer are completely in contact with the outer surface of the retainer, making the outer surface of the retainer very stable during grinding and preventing scratches on the outer surface of the retainer, so that the retainer can achieve high grinding accuracy. The through groove A on support rod A facilitates adjustment of the vertical position of support rod A, that is, the vertical position where alloy block A contacts the outer surface of the retainer, and the through groove B on support rod B facilitates adjustment of the left and right position of support rod B, that is, the left and right position where alloy block B contacts the outer surface of the retainer. At the same time, the arc-shaped T-slot on the connecting plate facilitates adjustment of the angle between support rod B and the horizontal direction, thus ensuring the stability of the grinding of the outer surface of the retainer.

[0009] The advantages of the utility model are that the contact surfaces of the alloy block in the horizontal and vertical directions can be completely matched with the outer surface of the retaining frame, thereby ensuring the grinding accuracy of the retaining frame. At the same time, the through grooves and the arc-shaped T-slots ensure that the grinding device is easy to adjust, which not only ensures the grinding accuracy of the retaining frame and improves the yield rate, but also improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a clamping device for grinding the outer surface of a transmission shaft retainer of the utility model.

[0011] Figure 2 yes Figure 1 Right view of .

[0012] Figure 3 yes Figure 1 AA section view in.

[0013] Figure 4 It is a structural diagram of the cage.

[0014] Figure 5 yes Figure 4 Right view of .

[0015] Figure 6 yes Figure 1 Enlarged view of part I in the middle.

[0016] Figure 7 yes Figure 3 Enlarged view of part II.

[0017] In the figure: 1 slot A, 2 contact surface A, 3 arc notch, 4 slot B, 5 contact surface B, 6 screw C, 7 through slot B, 8 machine tool body, 9 connecting plate, 10 support rod B, 11 arc T-slot, 12 blind hole B, 13 spring B, 14 screw G, 15 rotating shaft B, 16 support head B, 17 screw F, 18 alloy block B, 19 retaining frame, 20 magnetic conductor, 21 screw E, 22 alloy block A, 23 screw A, 24 rotating shaft A, 25 support head A, 26 screw B, 27 spring A, 28 blind hole A, 29 support rod A, 30 screw D, 31 through slot A, 32 spindle, 33 positioning surface, 34 small chamfer, 35 reference surface, 36 window, 37 retaining frame outer surface, 38 inner cylindrical surface, 39 large chamfer, 40 outer surface center. DETAILED DESCRIPTION

[0018] The utility model is a clamping device for grinding the outer surface of the transmission shaft retainer in a constant velocity universal joint of a car. Figure 1-7 Specifically describe the embodiments of the present invention, the present invention includes a connecting plate 9, a magnet 20, the connecting plate 9 is fixedly connected to the machine body 8, the connecting plate 9 is provided with an arc notch 3, the magnet 20 is located in the arc notch 3 of the connecting plate 9, and the magnet 20 is fixedly connected to the spindle 32 of the machine tool by a screw E21; the connecting plate 9 has two arc T-shaped slots 11 in the horizontal direction, the support rod B10 is fixedly connected to the arc T-shaped slot 11 of the connecting plate 9 by a screw C6, the connecting plate 9 vertical direction support rod A29 is fixedly connected to the connecting plate 9 by a screw D30, the support rod A29 has a through groove A31, the support head A25 is rotatably connected to the support rod A29 by a rotating shaft A24, the rotating shaft A24 is fixedly connected to the support rod A29, the rotating shaft A24 is rotatably connected to the support head A25, the alloy block A22 is fixedly connected to the support head A25 by a screw A23, the alloy block has a notch A1, the alloy block A22 has a notch A contact surface A2 is provided, and the shape of the contact surface A2 is consistent with the shape of the outer surface 37 of the retaining frame. A screw B26 is installed on the support head A25, and a blind hole A28 is provided on the support rod A29. A spring A27 is installed in the blind hole A28, and the spring A27 is opposite to the screw B26; a through groove B7 is provided on the support rod B10, and the support head B16 is rotatably connected to the support rod B10 through the rotating shaft B15. The rotating shaft B15 is fixedly connected to the support rod B10, and the rotating shaft B15 is rotatably connected to the support head B16. The alloy block B18 is fixedly connected to the support head B16 by a screw F17, a notch B4 is provided on the alloy block B18, and a contact surface B5 is provided on the alloy block B18. The shape of the contact surface B5 is consistent with the shape of the outer surface of the retaining frame, a screw G14 is installed on the support head B16, and a blind hole B12 is provided on the support rod B10. A spring B13 is installed in the blind hole B12, and the spring B13 is opposite to the screw G14.

[0019] The cage 19 is a thin-walled part, generally has six or eight windows 36 for keeping the steel balls in the same plane, and the cage profile surface 37 is generally formed by a circular arc or a straight line + a circular arc or a straight line + a circular arc + a straight line. In order to easily identify the reference surface 35 of the cage 19, a small chamfer 34 and a large chamfer 39 are generally machined on the inner cylindrical surface 38. The small chamfer 34 is selected as the reference surface 35 of the cage 19.

[0020] The working process of the utility model is as follows: first, an electrode with the same shape as the cage profile surface 37 is manufactured, the center lines of the support rod A29 and the support head A25 are made the same and the two are relatively fixed, the alloy block A22 of the support head A25 is subjected to electric spark machining by using the electrode, so that the contact surface A2 of the alloy block A22 has the same curved surface as the cage profile surface 37, so as to realize complete matching of the contact surface A2 and the cage profile surface 37 and play a stabilizing role in supporting; the support rod B10, the support head B16 and the alloy block B18 are subjected to electric spark machining by using the same machining method, so that the contact surface B5 of the alloy block B18 has the same curved surface as the cage profile surface 37, so as to realize complete matching of the contact surface B5 and the cage profile surface 37 and play a stabilizing role in supporting. After electric spark machining, the relative fixed relationship between the support rod A29 and the support head A25 is removed, and similarly, the relative fixed relationship between the support rod B10 and the support head B16 is removed.

[0021] A cage with a completely qualified cage profile surface 37 is prepared as an adjustment sample, the reference surface 35 of the adjustment sample is contacted with the positioning surface 33 of the magnet conductor 20, the equipment is started, the main shaft 32 is rotated at low speed, the magnet conductor 20 is electrified and the adjustment sample is attracted, the sample is adjusted by using the magnetic table and the lever percent table, so that the radial jump of the cage profile surface 37 of the sample when the sample rotates together with the magnet conductor 20 is less than 0.003 mm, the screw D30 is loosened, the support rod A29 is moved so that the contact surface A2 of the alloy block A22 on the support head A25 is completely matched with the cage profile surface 37 of the sample, and then the screw D30 is tightened; similarly, the screw C6 is loosened, the support rod B10 is moved so that the contact surface B5 of the alloy block B18 on the support head B16 is completely matched with the cage profile surface 37 of the sample, and the support rod B10 is moved in the arc T-shaped groove 11, so that the contact surface B5 of the alloy block B18 stably contacts with the cage profile surface 37 during the rotation of the adjustment sample, and then the screw C6 is tightened. The main shaft 32 is closed, the magnet conductor 20 is electrified and stopped, and the sample is removed.

[0022] The spindle 32 is started, and the swing-arm robot loads the material. The retainer 19 with the contour surface to be ground is placed on the positioning surface 33 of the magnet 20. The retainer 19 is attracted by the magnetic force, and the grinding wheel starts to rotate, grinding the retainer contour surface 37. The alloy blocks A22 and B18 match and support the retainer contour surface 37 until the retainer contour surface 37 is ground. The swing-arm robot removes the ground retainer 19 and loads another retainer 19 to be ground, entering the next processing cycle...

[0023] In order to make the schematic diagram clearer, the schematic diagram of the swing arm robot is omitted in the figure.

[0024] If the center between the two alloy blocks A22 is inconsistent with the center 40 of the outer surface of the sample, a gasket can be added between the support rod A29 and the connecting plate 9 for adjustment, or the contact surface of the support rod A29 and the connecting plate 9 can be ground off to a certain thickness to make the center between the two alloy blocks A22 consistent with the center 40 of the outer surface of the sample.

[0025] If the center between the two alloy blocks B18 is inconsistent with the center 40 of the outer surface of the sample, a gasket can be added between the support rod B10 and the connecting plate 9 for adjustment, or the contact surface of the support rod B10 and the connecting plate 9 can be ground off to a certain thickness to make the center between the two alloy blocks B18 consistent with the center 40 of the outer surface of the sample.

Claims

1. The clamping device for grinding the outer surface of the transmission shaft retainer is characterized by: The invention comprises a connecting plate (9), a magnet (20), a machine tool body (8), a main shaft (32) of the machine tool, a clamping assembly A, and a clamping assembly B. The connecting plate (9) is fixedly connected to the machine tool body (8). The connecting plate (9) is provided with an arc notch (3). The magnet (20) is located in the arc notch (3). The magnet (20) is fixedly connected to the main shaft (32) of the machine tool. The clamping assembly A comprises a support rod A (29), a screw D (30), a rotating shaft A (24), a support head A (25), and an alloy block A (22). The support rod A (29) is mounted on the connecting plate (9). A through slot A (31) is provided on the support rod A (29). A screw D (30) passes through the through slot A (31) on the support rod A and is fixedly connected to the connecting plate (9). The upper end of the support rod A (29) is fixedly connected to the rotating shaft A (24). The support head A (25) is rotatably connected to the rotating shaft A (24). The support head A (25) is fixedly connected to the alloy block A (22). The alloy block A (22) is fixedly connected, and a notch A (1) is provided on the alloy block A (22), and a contact surface A (2) is provided on the alloy block A (22) that matches and is opposite to the outer surface of the retainer; the clamping assembly B includes a support rod B (10), a screw C (6), a rotating shaft B (15), a support head B (16), and an alloy block B (18), and the support rod B (10) is installed on the connecting plate (9), and a through slot is provided on the support rod B (10) B(7), a screw C(6) passes through the through slot B(7) on the support rod B and is fixedly connected to the connecting plate, the upper end of the support rod B(10) is fixedly connected to the rotating shaft B(15), the support head B(16) is rotatably connected to the rotating shaft B(15), and the support head B(16) is fixedly connected to the alloy block B(18), the alloy block B(18) is provided with a notch B(4), and the alloy block B(18) is provided with a contact surface B(5) that matches and is opposite to the outer surface of the retainer.

2. The clamping device for grinding the outer surface of a transmission shaft retainer according to claim 1, characterized in that: The support head A (25) is provided with a screw B (26), the support rod A (29) is provided with a blind hole A (28), the blind hole A (28) is provided with a spring A (27), the spring A (27) is opposite to the screw B (26), the support head B (16) is provided with a screw G (14), the support rod B (10) is provided with a blind hole B (12), the blind hole B (12) is provided with a spring B (13), the spring B (13) is opposite to the screw G (14).

3. The clamping device for grinding the outer surface of a transmission shaft retainer according to claim 1, characterized in that: The connecting plate (9) is provided with an arcuate T-shaped slot (11) in the horizontal direction, and the screw C (6) passes through the through slot B (7) on the supporting rod B and is fixedly connected to the arcuate T-shaped slot (11).

4. The clamping device for grinding the outer surface of a transmission shaft retainer according to claim 3, characterized in that: There are two arc-shaped T-shaped grooves (11).

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