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] This utility model relates to a measuring instrument for the center of an outer spherical surface, specifically a center of the outer spherical surface of a transmission shaft cage. Background Technology

[0002] The constant velocity joint driveshaft of a car consists of a fixed end joint, an intermediate shaft, and a moving end joint. The fixed end joint is directly connected to the wheel hub of the car wheel, and the moving end joint is directly connected to the engine differential. The engine's power is transmitted to the wheels through the differential, moving end joint, intermediate shaft, fixed end joint, and wheel hub, thus driving the wheels to rotate. The fixed end joint mainly consists of an outer ring, a cage, steel balls, and an inner ring; the moving end joint mainly consists of an outer sleeve, a cage, steel balls, and an inner sleeve. The outer spherical surface of the cage mates with the inner spherical surface of the outer ring and the inner cylindrical surface of the outer sleeve. The outer spherical surface of the cage is finished by precision grinding, requiring high accuracy. If the dimensional accuracy of the center position of the outer spherical surface is not up to standard, it will mainly lead to the outer spherical surface of the cage and the inner spherical surface of the outer ring not meeting the technical specifications, resulting in easy wear, shortening the service life of the cage, and causing abnormal noise. Previously, the center of the outer spherical surface of the cage was detected using coordinate measuring machine (CMM). However, the measurement cycle was long and inefficient, requiring production to be stopped while waiting for the CMM results. Furthermore, it occupied CMM resources, resulting in significant waste. Therefore, there is an urgent need on the machining site for an instrument that can efficiently and conveniently measure the center position of the outer spherical surface of the cage while ensuring measurement accuracy. Summary of the Invention

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

[0004] The technical solution of this utility model is: a ball bearing cage outer spherical center detector, including a support column, a worktable, and a vertical plate. The worktable is fixedly connected to the support column, and the vertical plate is fixedly connected to the worktable. A ball bearing guide rail and a clamping block are fixedly mounted on the vertical plate. A slider A is slidably connected to the ball bearing guide rail. The clamping block has a slot, and a dial indicator is mounted on the clamping block. The rod of the dial indicator is located in the slot and is fastened by a screw B threaded to the clamping block. The contact of the dial indicator is opposite to the slider A. A probe is fixedly mounted on the slider A, and a device for... The cylinder A is in close contact with the surface between the non-reference surface of the retainer and the upper plane of the window, and the cylinder B is in close contact with the surface between the reference surface of the retainer and the lower plane of the window. The worktable is provided with a guide groove and a guide rod that passes through the guide groove and is fixedly connected to the worktable. A slider B is installed in the guide groove and is slidably connected. The slider B is provided with a sliding hole and is slidably connected to the guide rod through the sliding hole. A pull rod and two steel balls are fixedly installed on the slider B. The two steel balls are symmetrical about the guide rod. A spring B is installed on the guide rod located between the slider B and the worktable.

[0005] The slider B is provided with a clearance notch, which is located between the two steel balls.

[0006] A connecting block is fixedly connected to the slider A. One end of the screw A passes through the connecting block and is threaded to the worktable. A spring A is fitted on the screw A located between the connecting block and the worktable.

[0007] The advantages of this invention are as follows: First, a coordinate measuring machine is used to measure the center of the outer spherical surface of the cage to determine a qualified sample. This sample is then placed on the testing instrument, and the pointer reading of the dial indicator is used as the standard value of the center of the outer spherical surface of the sample. The cage to be measured is then replaced, and the pointer reading of the dial indicator is read to see if it is within the tolerance range of the standard value. A comparison method is used to determine whether the position of the center of the outer spherical surface of the cage is qualified. Therefore, this testing instrument can quickly and accurately measure the center value of the outer spherical surface of the cage, which is not only highly efficient but also provides reliable measurement results, reduces the scrap rate, and frees up the coordinate measuring machine. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the drive shaft cage outer spherical center detection instrument of this utility model.

[0009] Figure 2 yes Figure 1 Top view.

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

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

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

[0013] Figure 6 yes Figure 5 Top view.

[0014] Figure 7 This is a diagram showing the usage status of the drive shaft cage outer spherical center of gravity detector.

[0015] In the diagram: 1. Support column, 2. Workbench plate, 3. Spring A, 4. Connecting block, 5. Screw A, 6. Slider A, 7. Vertical plate, 8. Ball bearing guide rail, 9. Clamping block, 10. Dial indicator, 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 notch, 23. Groove, 24. Screw B, 25. Small chamfer, 26. Lower plane of window, 27. Reference plane, 28. Window, 29. Non-reference plane, 30. Inner cylindrical surface, 31. Large chamfer, 32. Upper plane of window, 33. Center of outer spherical surface. Detailed Implementation

[0016] This utility model is a ball center detector for the outer spherical surface of the retainer of a constant velocity universal joint driveshaft in a car. The following is in conjunction with the attached... Figure 1-6This invention describes an embodiment of the present invention. A spherical center of gravity detector for a transmission shaft cage includes a support column 1, a worktable 2, and a vertical plate 7. The worktable 2 is fixedly connected to the support column, and the vertical plate 7 is fixedly connected to the worktable 2. A ball bearing guide rail 8 is fixedly mounted on the vertical plate 7. A slider A6 is slidably connected to the ball bearing guide rail 8. A clamping block 9 is fixedly connected to the vertical plate 7. The clamping block 9 has a slot 23, and a screw B24 is mounted on the side of the slot 23. The screw B24 is threadedly connected to the clamping block 9. A dial indicator 10 is mounted on the clamping block 9. The dial indicator's rod 11 is located within the slot 23. The rod 11 is fixed to the clamping block 9 by screw B24. The dial indicator's contact 12 is opposite to the slider A6. A connecting block 4 is fixedly connected to the slider A6. Screw A5 passes through the connecting block 4 and is threaded to the worktable 2. Spring A3 is located between the connecting block 4 and the worktable 2 and is fitted onto screw A5. The probe 14 is fixedly connected to the slider A6. Cylinders A13 and B15 are respectively fixedly connected to the slider A6. Cylinder A13 is positioned... 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; the worktable 2 is provided with a guide groove 21, in which a slider B17 is installed. 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 worktable 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 of the two steel balls is located between the non-reference surface 29 of the retainer and the upper plane 32 of the window, and they are symmetrical about the guide rod 18. The slider B17 is provided with a clearance notch 22, which is located between the two steel balls 16. The purpose of the clearance notch 22 is to avoid interference when the two steel balls 16 come into contact with the outer spherical surface of the retainer. The spring B20 is fitted on the guide rod 18 located between the slider B17 and the worktable 2.

[0017] The function of screw A5 is to limit the position of the rising part 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 both cylinder A13 and cylinder B15 on slider A6 are in contact with the outer spherical surface of the cage).

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

[0019] The working process of this utility model is as follows: First, the center of the outer spherical surface of the cage is measured using a coordinate measuring machine. Then, the measured cage is marked as a cage sample. The specific value of the center of the outer spherical surface 33 of the cage is recorded and followed by the cage sample. Pulling the pull rod 19 causes the spring B20 to retract, providing sufficient space between the probe 14 and the slider B17 to place the cage sample on the worktable 2, with the reference surface 27 facing downwards. The two adjacent windows 28 of the cage sample are aligned with the probe 14. Releasing the pull rod 19 causes the slider B17 and its two steel balls 16 to push the cage sample forward under the elastic force of the spring B20, making the corresponding surface of the cage sample align with the cylinder on the probe 14. When cylinders A13 and B15 come into contact, slider A6 moves under the force of either cylinder A13 or B15 until cylinders A13 and B15 are in complete contact with the outer spherical surface of the cage. Slider A6 stops moving. As slider A6 moves to a new position, the pointer reading on dial indicator 10 changes. Adjust the pointer reading of dial indicator 10 for easy reading. This reading is taken as the true value of the cage sample. Mark the given tolerance range on the dial of dial indicator 10. Pull the lever 19 to release and remove the cage sample. Repeat the above steps and replace it with the cage to be measured. If the reading of dial indicator 10 is within the set tolerance range, the center of the outer spherical surface 33 of the cage is qualified; otherwise, it is unqualified and needs to be adjusted.

Claims

1. A sphere center detector for the outer spherical surface of a drive shaft cage, characterized in that: The system includes a support column (1), a worktable (2), and a vertical plate (7). The worktable (2) is fixedly connected to the support column, and the vertical plate (7) is fixedly connected to the worktable (2). A ball bearing guide rail (8) and a clamping block (9) are fixedly mounted on the vertical plate (7). A slider A (6) with sliding connection is mounted on the ball bearing guide rail (8). The clamping block (9) has a slot (23) and a dial indicator (10) is mounted on the clamping block (9). The rod (11) of the dial indicator (10) is located in the slot (23) and is fastened by a screw B (24) threaded onto the clamping block (9). The contact (12) of the dial indicator is opposite to the slider A (6). A probe (14) is fixedly mounted on the slider A (6). A probe (14) is fixedly mounted on the probe (14) for communication between the non-reference surface (29) of the retainer and the upper plane (32) of the window. The worktable (2) is provided with a guide groove (21) and a guide rod (18) that passes through the guide groove (21) and is fixed to the worktable (2). A slider B (17) is installed in the guide groove (21). The slider B (17) is provided with a sliding hole. 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 fixed on the slider B (17). The two steel balls (16) are symmetrical about the guide rod (18). A spring B (20) is fitted on the guide rod (18) above the pull rod (19) between the slider B (17) and the worktable (2).

2. The spherical center detection instrument for the outer surface of the transmission shaft cage according to claim 1, characterized in that: The slider B (17) is provided with a clearance notch (22), which is located between the two steel balls (16).

3. The spherical center detection instrument for the outer surface of the transmission shaft cage according to claim 1, characterized in that: A connecting block (4) is fixedly connected to the slider A (6). One end of the screw A (5) passes through the connecting block (4) and is threaded to the worktable (2). A spring A (3) is fitted on the screw A (5) located between the connecting block (4) and the worktable (2).

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