Spherical center detector for inner 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 contact of the dial indicator is opposite to the sliding block A, a U-shaped measuring head is fixedly installed on the sliding block A, a steel ball A and a steel ball B are fixedly installed on the U-shaped measuring head, and a guide groove and a receding groove are formed in a working table plate. The guide rod penetrates through the guide groove and is fixedly connected with the working table plate, the sliding block B is connected to the guide rod in a sliding mode, the sliding block B is fixedly provided with two steel balls C used for pushing the retainer to move, the sliding block B is fixedly provided with a push rod, the guide rod is sleeved with the spring B, the two ends of the spring B are connected with the sliding block B and the working table plate in a pressing mode respectively, and the bottom of the U-shaped measuring head is located in the receding groove which is in a T shape. The device can rapidly and accurately measure the ball center value of the inner spherical surface of the retainer, is convenient to adjust, improves the detection efficiency, and can guarantee the detection precision of the ball center of the inner spherical surface of the retainer.

Description

Technical Field

[0001] The invention relates to an instrument for measuring the center of an inner spherical surface, in particular to an instrument for detecting the center of an inner 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 inner sleeve, a retainer, a steel ball and an inner sleeve. The inner spherical surface of the retainer matches the outer spherical surface of the inner ring and the outer surface of the inner sleeve. The inner spherical surface of the retainer is completed by grinding and finishing, and the precision requirement is high. If the position dimensional accuracy of the inner spherical surface center is unqualified, it will mainly cause the inner spherical surface of the retainer to match the outer spherical surface of the inner ring not to meet the technical specifications, which is easy to wear, shortening the service life of the retainer and causing abnormal noise. In the past, the detection of the center of the inner 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, the scrap rate was high, and there was a lot of waste. Therefore, an instrument that can efficiently and conveniently measure the center position of the cage inner spherical surface during grinding and can ensure 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 cage inner spherical center detector, using this technology, when measuring the cage inner spherical center, not only is the adjustment convenient and the detection efficiency is improved, but also the detection accuracy of the cage inner spherical center can be guaranteed.

[0004] The technical solution of the present invention is: a spherical center detector in a transmission shaft cage, comprising a pillar, a worktable, and a vertical plate, wherein the worktable is fixedly connected to the pillar, and the vertical plate is fixedly connected to the worktable, wherein the vertical plate is fixedly mounted with a ball guide rail and a clamping block, wherein the ball guide rail is provided with a sliding block A in sliding connection, wherein a notch is provided on the clamping block, wherein a micrometer is mounted on the clamping block, wherein the rod of the micrometer is located in the notch, wherein the rod of the micrometer and the clamping block are fastened by a screw B on the clamping block, wherein the contact of the micrometer is opposite to the slider A, wherein a C-shaped probe is fixedly mounted on the slider A, wherein the C-shaped probe is fixedly mounted with screws for respectively measuring the contact between two adjacent windows of the cage The corresponding surfaces contact the steel balls A and B to push the slider A to move. The worktable is provided with a guide groove and a clearance groove. The guide rod passing through the guide groove is fixedly connected to the worktable. The slider B installed in the guide groove is slidably connected to the guide rod. The upper end of the slider B is placed above the worktable. Two steel balls C for pushing the retaining frame to move are fixedly installed on the slider B. The lower end of the slider B is placed below the worktable. A push rod for adjusting the distance between the C-shaped probe and the slider B is fixedly installed on the slider B. The spring B is mounted on the guide rod. The two ends of the spring B are crimped with the slider B and the worktable respectively; the bottom of the C-shaped probe is located in the clearance groove, and the clearance groove is T-shaped.

[0005] The slider A is fixedly connected with a connecting block, the screw A passes through the connecting block and is connected with the workbench, and the spring A is located between the connecting block and the workbench and is sleeved on the screw A.

[0006] The principle of the present invention is: using a comparison method, specifically, first using three-coordinate measurement to measure the center of the spherical surface of the cage, then burning a mark on the cage after measurement as a cage sample, and recording the specific value of the center of the spherical surface of the cage and following the cage sample, pushing the push rod, spring B retracts, so that the spacing between the steel balls A and B on the C-shaped probe and the steel ball C on the slider B is small enough to put the cage sample on the workbench, with the reference surface side facing downward, and aligning the steel balls A and B on the C-shaped probe between two adjacent windows of the cage sample, loosening the push rod, under the action of spring B, the slider B and the two steel balls C thereon are pushed backward Move the cage sample and make it contact with the steel balls A and B on the C-shaped probe. The slider A fixed to the C-shaped probe moves under force until the steel balls A and B are completely in contact with the cage sample. As the slider A moves, the pointer reading on the micrometer changes. Adjust the pointer reading of the micrometer for easy reading. The reading at this time is taken as the true value of the cage sample. Mark the given tolerance range on the dial of the micrometer. Push the push rod, remove the cage sample, and replace it with the cage to be measured. If the reading of the micrometer is within the set tolerance range, the center of the spherical surface in the cage is qualified. Otherwise, it is unqualified and needs to be adjusted.

[0007] The advantages of the present invention are as follows: it can quickly and accurately measure the center value of the inner spherical surface of the cage, not only with high efficiency, but also with reliable measurement results, reducing the rejection rate and liberating the three-coordinate measuring machine. Brief Description of the Drawings

[0008] Figure 1 It is a schematic structural view of the detector for the center of the inner spherical surface of the drive shaft cage of the present invention.

[0009] Figure 2 is Figure 1 the top view of

[0010] Figure 3 is Figure 1 the sectional view taken along the line A-A of

[0011] Figure 4 is Figure 2 the sectional view taken along the line C-C in

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

[0013] Figure 6 is Figure 5 the top view of

[0014] In the figure: 1 pillar, 2 workbench plate, 3 spring A, 4 connecting block, 5 screw A, 6 slider A, 7 vertical plate, 8 ball guide rail, 9 clamping block, 10 dial indicator, 11 rod part, 12 contact head, 13 U-shaped measuring head, 14 steel ball A, 15 steel ball B, 16 slider B, 17 steel ball C, 18 guide rod, 19 push rod, 20 guide groove, 21 relief groove, 22 spring B, 23 notch, 24 screw B, 25 small chamfer, 26 lower plane of the window, 27 reference plane, 28 window, 29 non-reference plane, 30 large chamfer, 31 upper plane of the window, 32 inner cylindrical surface, 33 center of the inner spherical surface. Detailed Embodiment

[0015] The present invention is a detector for detecting the center of the inner spherical surface of the cage of a car constant velocity universal joint drive shaft. The following Figure 1-6 illustrates the embodiments of the present invention with reference to the attached drawings.

[0016] The spherical center detector of the transmission shaft cage includes a pillar 1, a workbench 2, and a vertical plate 7. The workbench 2 is fixedly connected to the pillar 1, and the vertical plate 7 is fixedly connected to the workbench 2. A ball guide rail 8 is fixedly installed on the vertical plate 7. The slider A6 is slidably connected to the ball guide rail 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. The rod 11 of the micrometer In the slot 23, the micrometer rod 11 is fixed to the clamping block 9 by screw B24, the micrometer contact 12 is opposite to the slider A6, the slider A6 is fixedly connected with the connecting block 4, the screw A5 passes through the connecting block 4 and is connected to 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 C-shaped probe 13 is fixedly connected to the slider A6, the steel ball A14 and the steel ball B15 are respectively fixedly connected to the C-shaped probe 13, and the steel ball A14 is located on the non-reference surface 29 of the retainer and the upper plane 31 of the window, the steel ball B15 is located between the reference plane of the holder and the lower plane of the window; the workbench 2 is provided with a guide groove 20 and a clearance groove 21, the guide groove 20 is equipped with a slider B16, the slider B16 is slidably connected to the guide groove 20, the guide rod 18 passes through the guide groove 20 and is fixedly connected to the workbench 2, the guide rod 18 is slidably connected to the sliding hole on the slider B16, the push rod 19 is fixedly connected to the slider B16, two steel balls C17 are fixedly connected to the slider B16, the height of the two steel balls C17 is located between the reference plane 27 of the holder and the lower plane 26 of the window, and is symmetrical with each other around the guide rod 18 as the center, and is used to push the holder to move, the spring B22 is sleeved on the guide rod 18 and is located between the slider B16 and the workbench 2; the U-shaped probe 13 is located in the clearance groove 21, and the clearance groove 21 is T-shaped, the purpose is to reduce the tail area of ​​the clearance groove 21, so that the contact area between the holder and the workbench is large enough and remains stable during the measurement process.

[0017] The function of screw A5 is to limit the rising position of slider A6 so that the position of slider A6 is within a reasonable range that is convenient for measurement (the reasonable range refers to: 0.3-0.8mm higher than the position of slider A6 when the steel balls A14 and B15 on the C-shaped probe 13 fixed to slider A6 both contact the inner spherical surface of the retaining frame).

[0018] The cage is a thin-walled part, usually with six or eight windows 28, used to keep the steel balls on the same plane. 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 30 are usually processed on the inner cylindrical surface 32, 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 31 and a lower window plane 26. The distance between the center point of the inner spherical surface of the cage and the reference surface 27 is referred to as the inner spherical center.

[0019] The working process of the present invention is as follows: first, the center of the spherical surface of the cage is measured by three-coordinate measurement, and then the measured cage is marked as a cage sample, and the specific value of the center of the spherical surface of the cage is recorded and followed by the cage sample, and the push rod 19 is pushed, and the spring B22 is retracted, so that the spacing between the steel balls A14, B15 on the C-shaped probe 13 and the steel ball C17 on the slider B16 is small enough to put the cage sample on the workbench 2, with the reference surface 27 facing downward, and the steel balls A14 and B15 on the C-shaped probe 13 are aligned between two adjacent windows 28 of the cage sample, and the push rod 19 is released. Under the elastic force of the spring B22, the slider B16 and the two steel balls C17 thereon push the cage sample backward and make the cage sample When the sample is in contact with the steel ball A14 and the steel ball B15 on the C-shaped probe 13, the slider A6 fixed to the C-shaped probe 13 moves under the force state of the steel ball A14 or the steel ball B15 until the steel ball A14 and the steel ball B15 are completely in contact with the inner spherical surface of the cage, and the slider A6 stops moving. With the movement of the slider A6, the pointer reading on the micrometer 10 changes. The pointer reading of the micrometer 10 is adjusted for easy reading. The reading at this time is used as the true value of the cage sample. The given tolerance range is marked on the dial of the micrometer 10. The push rod 19 is pushed to remove the cage sample. The steps are the same as above. Replace the cage to be measured. If the reading of the micrometer 10 is within the set tolerance range, the center of the spherical surface inside the cage is qualified. Otherwise, it is unqualified and needs to be adjusted.

Claims

1. The spherical center detector of the transmission shaft cage is characterized by: The machine comprises a support column (1), a workbench (2), and a vertical plate (7), wherein the workbench (2) is fixedly connected to the support column (1), and the vertical plate (7) is fixedly connected to the workbench (2), a ball guide rail (8) and a clamping block (9) are fixedly mounted on the vertical plate (7), a sliding block A (6) slidably connected to the ball guide rail (8), a notch (23) is provided on the clamping block (9), a micrometer (10) is mounted on the clamping block (9), and the micrometer (10) ) is located in the notch (23), the micrometer rod (11) and the clamping block (9) are fastened by a screw B (24) on the clamping block (9), the micrometer contact (12) is opposite to the slider A (6), the slider A (6) is fixed with a C-shaped probe (13), the C-shaped probe (13) is fixed with a steel ball A (12) for contacting the corresponding surface between two adjacent windows of the retaining frame to push the slider A6 to move 4) and a steel ball B (15), the workbench (2) is provided with a guide groove (20) and a clearance groove (21), a guide rod (18) passing through the guide groove (20) is fixedly connected to the workbench (2), a slider B (16) installed in the guide groove (20) is slidably connected to the guide rod (18), the upper end of the slider B (16) is placed above the workbench (2), and two steel balls C for pushing the retaining frame to move are fixedly installed on the slider B (16) (17), the lower end of the slider B (16) is placed below the workbench (2), the slider B (16) is fixed with a push rod (19) for adjusting the distance between the C-shaped probe 13 and the slider B (16), the spring B (22) is sleeved on the guide rod (18), and the two ends of the spring B (22) are respectively pressed against the slider B (16) and the workbench (2); the bottom of the C-shaped probe (13) is located in the clearance groove (21), and the clearance groove (21) is T-shaped.

2. The transmission shaft cage inner spherical center detector according to claim 1, characterized in that: A connecting block (4) is fixedly connected to the slider A (6), a screw A (5) passes through the connecting block (4) and is connected to the workbench (2), and a spring A (3) is located between the connecting block (4) and the workbench (2) and is sleeved on the screw A (5).

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