Spherical center detector for outer spherical surface of transmission shaft retainer

Abstract

A ball guide rail and a clamping block are fixedly installed on a vertical plate, a sliding block A is installed on the ball guide rail, a dial indicator is installed on the clamping block, a measuring head is fixedly installed on the sliding block A, a cylinder A and a cylinder B are fixedly installed on the measuring head, a guide groove and a guide rod are arranged on a working table plate, and the guide rod penetrates through the guide groove and is fixedly connected with the working table plate. A sliding block B connected to the guide rod in a sliding mode is arranged in the guide groove, a pull rod and two steel balls are fixedly arranged on the sliding block B, and a spring B is arranged on the guide rod above the pull rod and located between the sliding block B and the working table in a sleeved mode. A qualified sample piece is placed on the detector, the pointer reading of the dial indicator of the detector is used as the standard value of the spherical center of the outer spherical surface of the sample piece, the retainer to be measured is replaced, whether the spherical center position of the outer spherical surface of the retainer is qualified or not is judged by adopting a comparison method, the detector can quickly and accurately measure the spherical center value of the outer spherical surface of the retainer, the efficiency is high, and the detection accuracy is high. And the measurement result is reliable, the rejection rate is reduced, and three coordinates are liberated.

Description

Technical Field

[0001] The invention relates to an instrument for measuring the center of an outer spherical surface, in particular to an instrument for detecting the center of an outer spherical surface of a transmission shaft retainer. Background Art

[0002] The transmission shaft of the car constant velocity universal joint is composed of a fixed end joint, an intermediate shaft and a movable end joint, wherein the fixed end joint is directly connected to the wheel hub of the car wheel, and the movable end joint is directly connected to the differential of the engine. The power of the engine is transmitted to the wheel through the differential, the movable end joint, the intermediate shaft, the fixed end joint and the wheel hub, thereby driving the wheel to rotate. The fixed end joint is mainly composed of an outer ring, a retainer, a steel ball and an inner ring; the movable end joint is mainly composed of an outer sleeve, a retainer, a steel ball and an inner sleeve. The outer spherical surface of the retainer matches the inner spherical surface of the outer ring and the inner cylindrical surface of the outer sleeve. The outer spherical surface of the retainer is completed by grinding finishing, and the precision requirement is high. If the dimensional accuracy of the center position of the outer spherical surface is not up to standard, it will mainly cause the outer spherical surface of the retainer to match the inner spherical surface of the outer ring not to meet the technical specifications, which is easy to wear, shorten the service life of the retainer, and cause abnormal noise. In the past, the detection of the center of the outer spherical surface of the cage was carried out by three-coordinate measurement, but the measurement cycle was long and the efficiency was low. Production had to be stopped to wait for the three-coordinate measurement results, and the three-coordinate resources were occupied, which was a big waste. Therefore, an instrument that can efficiently and conveniently measure the center position of the cage when grinding the outer spherical surface and can ensure the measurement accuracy is urgently needed at the processing site. Summary of the invention

[0003] The purpose of the present invention is to provide a transmission shaft retainer outer spherical center detector. Using this technology, when measuring the outer spherical center of the retainer, it is not only convenient to adjust and improve efficiency, but also can ensure the detection accuracy of the outer spherical center of the retainer.

[0004] The technical solution of the present invention is: a transmission shaft retainer outer spherical center detector, comprising a pillar, a workbench, and a vertical plate, the workbench is fixedly connected to the pillar, the vertical plate is fixedly connected to the workbench, the vertical plate is fixedly installed with a ball guide rail and a clamping block, the ball guide rail is equipped with a sliding block A in sliding connection, the clamping block is provided with a notch, the clamping block is equipped with a micrometer, the rod of the micrometer is located in the notch, and is fastened by a screw B threadedly connected to the clamping block, the contact of the micrometer is opposite to the slider A, the slider A is fixedly installed with a probe, and the probe is fixedly installed with a probe for contacting with the slider A cylinder A is used for tightly contacting the surface between the non-reference surface of the retainer and the upper plane of the window, and a cylinder B is used for tightly contacting the surface between the reference surface of the retainer and the lower plane of the window. A guide groove and a guide rod passing through the guide groove and fixedly connected to the workbench are provided on the workbench. A sliding block B is installed in the guide groove. The slider B is provided with a sliding hole. The slider B is slidingly connected to the guide rod through the sliding hole. A pull rod and two steel balls are fixed on the slider B. The two steel balls are symmetrical with each other around the guide rod. A spring B is mounted on the guide rod between the slider B and the workbench.

[0005] The sliding block B is provided with a clearance gap, and the clearance gap is located between the two steel balls.

[0006] The sliding block A is fixedly connected with a connecting block, one end of the screw A passes through the connecting block and is threadedly connected with the workbench, and a spring A is sleeved on the screw A located between the connecting block and the workbench.

[0007] The advantages of the present invention are as follows: the present invention first uses three-coordinates to measure the center of the outer spherical surface of the cage, determines a qualified sample, places the sample on the detector, uses the pointer reading of the micrometer of the detector as the standard value of the center of the outer spherical surface of the sample, replaces the cage to be measured, reads the pointer reading of the micrometer of the detector to see if it is within the tolerance range of the standard value, and uses a comparison method to determine whether the position of the center of the outer spherical surface of the cage is qualified. Therefore, the present detector can quickly and accurately measure the center value of the outer spherical surface of the cage, which is not only efficient, but also has reliable measurement results, reduces the scrap rate, and frees up the three coordinates. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the outer spherical center detector of the transmission shaft retainer of the present invention.

[0009] Figure 2 yes Figure 1 Top view of the .

[0010] Figure 3 yes Figure 1 AA section view.

[0011] Figure 4 yes Figure 2 CC section view in .

[0012] Figure 5 It is a diagram of the cage structure.

[0013] Figure 6 yes Figure 5 Top view of the .

[0014] Figure 7 This is a diagram showing the status of the transmission shaft cage outer spherical center detector in use.

[0015] In the figure: 1 pillar, 2 workbench, 3 spring A, 4 connecting block, 5 screw A, 6 slider A, 7 vertical plate, 8 ball guide, 9 clamping block, 10 micrometer, 11 rod, 12 contact, 13 cylinder A, 14 probe, 15 cylinder B, 16 steel ball, 17 slider B, 18 guide rod, 19 pull rod, 20 spring B, 21 guide groove, 22 clearance gap, 23 notch, 24 screw B, 25 small chamfer, 26 window lower plane, 27 reference surface, 28 window, 29 non-reference surface, 30 inner cylindrical surface, 31 large chamfer, 32 window upper plane, 33 outer spherical center. DETAILED DESCRIPTION

[0016] The present invention is a car constant velocity universal joint transmission shaft cage outer spherical center detector, as follows Figure 1-6 The transmission shaft retainer outer spherical center detector comprises a pillar 1, a workbench 2, and a vertical plate 7. The workbench 2 is fixedly connected to the pillar, and the vertical plate 7 is fixedly connected to the workbench 2. A ball guide 8 is fixedly installed on the vertical plate 7. The slider A6 is slidably connected to the ball guide 8. The clamping block 9 is fixedly connected to the vertical plate 7. A notch 23 is provided on the clamping block 9. A screw B24 is installed on the side of the notch 23. The screw B24 is threadedly connected to the clamping block 9. A micrometer 10 is installed on the clamping block 9. The rod 11 of the dial gauge is located in the notch 23, and the rod 11 of the dial gauge is fixed to the clamping block 9 by means of screws B24. The contact 12 of the dial gauge is opposite to the slider A6. The slider A is fixedly connected with the connecting block 4. The screw A5 passes through the connecting block 4 and is threadedly connected with the workbench 2. The spring A3 is located between the connecting block 4 and the workbench 2 and is sleeved on the screw A5. The probe 14 is fixedly connected to the slider A6. The cylinder A13 and the cylinder B15 are respectively fixedly connected to the slider A6. The cylinder A13 is located between the connecting block 4 and the workbench 2. Between the non-reference surface 29 of the retainer and the upper plane 32 of the window, the cylinder B15 is located between the reference surface 27 of the retainer and the lower plane 26 of the window; a guide groove 21 is provided on the workbench 2, a slider B17 is installed in the guide groove 21, the slider B17 is slidably connected to the guide groove 21, the guide rod 18 passes through the guide groove 21 and is fixedly connected to the workbench 2, the guide rod 18 is slidably connected to the sliding hole on the slider B17, the pull rod 19 is fixedly connected to the slider B17, two steel balls 16 are fixedly connected to the slider B17, the height positions of the two steel balls are located between the non-reference surface 29 of the retainer and the upper plane 32 of the window, and are symmetrical with each other around the guide rod 18, a clearance notch 22 is provided on the slider B17, the clearance notch 22 is located between the two steel balls 16, and the purpose is to avoid interference when the two steel balls 16 contact the outer spherical surface of the retainer, and the spring B20 is sleeved on the guide rod 18 located between the slider B17 and the workbench 2.

[0017] The function of screw A5 is to limit the position of the rising point of slider A6 so that the position of slider A6 is within a reasonable range that is convenient for measurement (0.3-0.8mm higher than the position of slider A6 when cylinder A13 and cylinder B15 on slider A6 both contact the outer spherical surface of the retainer).

[0018] The cage is a thin-walled part, usually with six or eight windows 28, used to keep the steel balls on the same cross section. In order to easily identify the reference surface 27 and non-reference surface 29 of the cage, a small chamfer 25 and a large chamfer 31 are usually processed on the inner cylindrical surface 30, and the side of the small chamfer 25 is selected as the reference surface 27 of the cage. The window 28 of the cage has an upper window plane 32 and a lower window plane 26. The distance from the center point of the outer spherical surface of the cage to the reference surface 27 is referred to as the outer spherical center 33.

[0019] The working process of the present invention is as follows: first, the center of the outer spherical surface of the cage is measured by three-coordinate measurement, and then the measured cage is burned with a mark as a cage sample, and the specific value of the center of the outer spherical surface 33 of the cage is recorded and followed by the cage sample, and the pull rod 19 is pulled, and the spring B20 is retracted, so that there is enough space between the probe 14 and the slider B17 to place the cage sample on the workbench 2, with the reference surface 27 facing downward, and the two adjacent windows 28 of the cage sample are aligned with the probe 14, and the pull rod 19 is released. Under the elastic force of the spring B20, the slider B17 and the two steel balls 16 thereon push the cage sample forward and align the corresponding surface of the cage sample with the cylinder A on the probe 14. 13. When the cylinder B15 contacts, the slider A6 moves under the force state of the cylinder A13 or the cylinder B15 until the cylinder A13 and the cylinder B15 completely contact the outer spherical surface of the cage and the slider A6 stops moving. As the slider A6 moves to the new position, the pointer reading on the micrometer 10 changes. Adjust the pointer reading of the micrometer 10 for easy reading. The reading at this time is used as the true value of the cage sample. Mark the given tolerance range on the dial of the micrometer 10, pull the pull rod 19, loosen and remove the cage sample, follow the same steps as above, replace the cage to be measured, if the reading of the micrometer 10 is within the set tolerance range, the center 33 of the outer spherical surface of the cage is qualified, otherwise it is unqualified and needs to be adjusted.

Claims

1. Transmission shaft cage outer spherical center detector, characterized by: The invention comprises a support column (1), a workbench (2), and a vertical plate (7), wherein the workbench (2) is fixedly connected to the support column, and the vertical plate (7) is fixedly connected to the workbench (2), wherein the vertical plate (7) is fixedly installed with a ball guide rail (8) and a clamping block (9), wherein the ball guide rail (8) is provided with a sliding block A (6) in sliding connection, wherein the clamping block (9) is provided with a notch (23), wherein the clamping block (9) is provided with a micrometer (10), wherein the rod (11) of the micrometer (10) is located in the notch (23) and is fastened by a screw B (24) threadedly connected to the clamping block (9), wherein the contact (12) of the micrometer is opposite to the sliding block A (6), wherein the sliding block A (6) is fixedly installed with a probe (14), wherein the probe (14) is fixedly installed with a tool for measuring between the non-reference surface (29) of the retaining frame and the upper plane (32) of the window. A cylinder A (13) with a tightly contacting surface, and a cylinder B (15) for tightly contacting the surface between the retaining frame reference surface (27) and the lower plane (26) of the window, the workbench (2) is provided with a guide groove (21) and a guide rod (18) passing through one end of the guide groove (21) and fixedly connected to the workbench (2), a sliding block B (17) is installed in the guide groove (21), a sliding hole is provided on the slider B (17), the slider B (17) is slidably connected to the guide rod (18) through the sliding hole, a pull rod (19) and two steel balls (16) are fixedly installed on the slider B (17), the two steel balls (16) are symmetrical with each other with the guide rod (18) as the center, and a spring B (20) is installed on the guide rod (18) between the slider B (17) and the workbench (2) above the pull rod (19).

2. The transmission shaft retainer outer spherical center detector according to claim 1, characterized in that: The slider B (17) is provided with a clearance notch (22), and the clearance notch (22) is located between the two steel balls (16).

3. The transmission shaft retainer outer spherical center detector according to claim 1, characterized in that: The sliding block A (6) is fixedly connected with a connecting block (4), one end of a screw A (5) passes through the connecting block (4) and is threadedly connected with the workbench (2), and a spring A (3) is mounted on the screw A (5) located between the connecting block (4) and the workbench (2).

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