Detection instrument for inner sphere diameter of transmission shaft retainer

Abstract

The utility model relates to a transmission shaft retainer inner sphere diameter detector, in particular to a retainer inner sphere diameter detector for a fixed end joint and a movable end joint of a car constant velocity universal joint transmission shaft, which comprises a support, a rotating shaft A, a rotating shaft B and a positioner, a measuring rod A is rotatably connected to the rotating shaft A, the measuring rod A is perpendicular to and fixedly connected with a measuring head A, a measuring rod B is rotatably connected to the rotating shaft B, and the measuring rod B is perpendicular to and fixedly connected with a measuring head B; a gauge rod of the dial gauge and the measuring rod B are fastened through a screw, a contact on the dial gauge makes contact with the end face of a screw installed on the measuring rod A, one end of the bolt penetrates through the measuring rod A and is in spiral connection with the measuring rod B, the spring is sleeved on the bolt, the positioner is provided with a spherical groove, a square notch, a groove opening A and a groove opening B, the square notch is opposite to a reamed hole in the working table plate, the measuring head A is opposite to the groove opening A, and the groove opening B is opposite to the groove opening B. And the measuring head B is opposite to the groove opening B. When the detector is used for measuring the inner ball diameter of the retainer, not only is the measurement convenient, but also the detection precision of the inner ball diameter of the retainer can be ensured.

Description

Technical Field

[0001] This utility model relates to an instrument for measuring the inner ball diameter, specifically an instrument for measuring the inner ball diameter of the cage of the fixed end section and the moving end section of the constant velocity universal joint drive shaft in automobiles. 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 inner spherical surface of the cage mates with the outer spherical surface of the inner ring or the outer surface of the inner sleeve. The inner spherical surface of the cage is mainly finished by precision grinding. In particular, the dimensional accuracy requirements for the inner spherical surface of the cage in the fixed end joint are very high. If the dimensional accuracy of the inner spherical surface of the cage is not up to standard, the fit between the inner spherical surface of the cage and the outer spherical surface of the inner ring will not meet the technical specifications, leading to easy wear, shortening the service life of the cage and inner ring, and causing abnormal noise. Previously, the inner diameter of the ball inside the cage was measured using an inside diameter dial indicator. However, accurately measuring the diameter of the ball passing through the center is difficult, prone to error, time-consuming, and inefficient. Furthermore, the measured values ​​can vary due to human factors, and more importantly, sometimes incorrect readings can lead to batch scrapping and significant waste. Therefore, there is an urgent need in the manufacturing process for an instrument that can efficiently and conveniently measure the inner diameter of the ball inside the cage while ensuring measurement accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a ball diameter measuring instrument for a drive shaft cage. Using this technology, the measurement of the ball diameter inside the cage is not only convenient, but also ensures the accuracy of the ball diameter measurement.

[0004] The technical solution of this utility model is: a ball diameter measuring instrument for a transmission shaft cage, comprising a support column and a worktable, the worktable being fixedly connected to the support column, a bracket and a positioner fixedly mounted on the worktable, and an enlarged hole provided on the worktable. A rotating shaft A is fixedly mounted on the bracket, and a measuring rod A is rotatably connected to the rotating shaft A. One end of the measuring rod A is a detection connection end A, which is perpendicular to and fixedly connected to the probe A and the measuring rod A. The other end of the measuring rod A is provided with a threaded hole A and a long groove. A rotating shaft B is fixedly mounted on the bracket, and a measuring rod B is rotatably connected to the rotating shaft B. One end of the measuring rod B is a detection connection end B. The detection connection end B is perpendicular to and fixed to the probe B and the probe rod B. The other end of the probe rod B is provided with a threaded hole B. The front end of the dial indicator rod is the contact. The rod and the contact pass through the hole on the probe rod B. The rod and the probe rod B are fastened by a screw provided on the hole wall. The screw spirals through the threaded hole A and its end face contacts the contact on the dial indicator. The other end of the screw is spirally connected to the nut B. One end of the bolt passes through the long slot on the probe rod A and is spirally connected to the threaded hole B of the probe rod B. The end of the bolt is spirally connected to the nut A. A spring is fitted on the bolt and is located between the probe rod A and the bolt head. The locator is provided with a spherical recess, a square slot, a groove A, and a groove B. The square slot is opposite to the enlarged hole on the workbench. The probe A is opposite to the groove A, and the probe B is opposite to the groove B. The extension line of the axis of the probe A coincides with the extension line of the axis of the probe B through the center of the spherical recess of the locator.

[0005] The principle of this invention is as follows: Using a comparison method, a cage that meets the limit sample requirements after measuring the inner sphere diameter with a coordinate measuring machine is marked as a cage limit sample. Two cage limit samples are placed in the spherical recesses of the locator, so that probe A and probe B respectively contact the inner spherical surface of the cage. The dial indicator reading will then change. The pointer ranges corresponding to the two cage limit samples are marked. The cage limit samples are removed, and the cage to be measured is placed in the spherical recess of the locator, with probe A and probe B contacting the inner spherical surface of the cage. The dial indicator reading will then change. If the dial indicator reading is within the marked range, the inner sphere of the cage is qualified; otherwise, it is unqualified and needs adjustment.

[0006] The advantages of this invention are: it can quickly and accurately measure the diameter of the ball inside the cage, which is not only highly efficient but also provides reliable measurement results, thus avoiding the occurrence of batch defects; because the spherical recess of the positioner matches the outer spherical surface of the cage, and the probes A and B are aligned through the center of the spherical recess, the diameter of the ball passing through the center of the spherical surface inside the cage can be accurately measured, thus avoiding the influence of human factors. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the ball diameter measuring instrument for the transmission shaft cage of this utility model.

[0008] Figure 2yes Figure 1 AA-direction cross-sectional view.

[0009] Figure 3 This is a schematic diagram of the cage structure.

[0010] Figure 4 yes Figure 3 Top view.

[0011] Figure 5 This is a schematic diagram showing the working state of the ball diameter measuring instrument inside the drive shaft cage.

[0012] Figure 6 This is a structural diagram of shaft A and shaft B.

[0013] In the diagram: 1. Positioner; 2. Square slot; 3. Detection connection end A; 4. Probe A; 5. Groove A; 6. Bracket; 7. Shaft A; 8. Nut B; 9. Screw; 10. Threaded hole A; 11. Bolt; 12. Spring; 13. Probe A; 14. Long slot; 15. Probe B; 16. Threaded hole B; 17. Nut A; 18. Contact; 19. Indicator rod; 20. Dial indicator; 21. Screw; 22. Shaft B; 23. Groove B; 24. Probe B; 25. Detection connection end B; 26. Spherical recess; 27. Support column; 28. Worktable; 29. ​​Center of spherical recess; 30. Enlarged hole; 31. Window; 32. Inner spherical surface; 33. Outer spherical surface. Detailed Implementation

[0014] This invention relates to a ball diameter measuring instrument for a driveshaft cage, specifically for the fixed and moving end sections of a constant velocity joint driveshaft in a passenger car. The cage is a thin-walled part with an inner spherical surface 32 and an outer spherical surface 33, typically having six or eight windows 31 to keep the steel balls on the same cross-section. The inner wall of the spherical recess 26 on the locator is designed to fit the outer spherical surface of the cage. Probes A and B are positioned opposite each other through the center of the spherical recess, allowing for accurate measurement of the ball diameter passing through the center of the inner spherical surface of the cage. The technical solution of this measuring instrument is described in the appendix. Figure 1-6As shown, the system includes a support column 27 and a worktable 28, with the worktable 28 fixedly connected to the support column 27. A bracket 6 and a positioner 1 are fixedly mounted on the worktable 28. The worktable 28 has an enlarged hole 30. A rotating shaft A7 is fixedly mounted on the bracket 6. A measuring rod A13 is rotatably connected to the rotating shaft A7. One end of the measuring rod A13 has a detection connection end A3, which is perpendicular to and fixedly connected to the probe A4 and the measuring rod A13. The other end of the measuring rod A13 has a threaded hole A10 and a long slot 14. A rotating shaft B22 is fixedly mounted on the bracket 6. A measuring rod B15 is rotatably connected to the rotating shaft B22. One end of the measuring rod B15 has a detection connection end B25. B25 is perpendicular to and fixed to probe B24 and probe B15. The other end of probe B15 has a threaded hole B16. One end of screw 9 is screwed into threaded hole A10 on probe A13. Nut B8 is screwed into screw 9. The dial indicator 19 of dial indicator 20 passes through the hole on probe B15, and one end of screw 21 passes through the hole wall on probe B15 and presses against the dial indicator 19, thus fixing the dial indicator 19 to probe B15. The contact 18 on the dial indicator contacts the end face of screw 9. Bolt 11 passes through the long slot 14 on probe A13 and is screwed into threaded hole B16 on probe B15. Nut A17 is screwed into bolt 11. Spring 12... The positioning device 1 is fitted onto bolt 11 and located between probe A13 and bolt head. It has a spherical recess 26, a square groove 2, a recessed groove A5, and a recessed groove B23. The square groove 2 is opposite to the enlarged hole 30 on the workbench. The spring force causes probe A13 to rotate around axis A7 and probe B15 to rotate around axis B22, thereby bringing the detection connection ends A3 and B25 into contact with the two ends of the square groove 2. This puts probe 4 and probe 24 into a working measuring state. The square groove 2 serves to position and limit the position of detection connection ends A3 and B25 within the groove. When probes A13 and B15 rotate around shafts A7 and B22 respectively, the long slots provide clearance. The enlarged hole 30 facilitates cleaning of the inner surface of the spherical recess, allowing dirt to easily fall through the square slot. Probe A4 is opposite to recess A5, and probe B24 is opposite to recess B23. Recesses A5 and B23 facilitate the placement of the retainer into the spherical recess and ensure contact between the probe and the inner spherical surface of the retainer. Probes A4 and B24 are aligned through the center 29 of the spherical recess of the locator, meaning the extension of the axis of probe A4 coincides with the extension of the axis of probe B24 through the center 29 of the spherical recess of the locator.

[0015] The working process of this utility model is as follows: First, a cage whose inner spherical diameter value after coordinate measuring machine measurement meets the requirements of the limit sample is marked as a cage limit sample. Two cage limit samples are then placed in the spherical recess 26 of the locator 1, ensuring that the outer spherical surface 33 of the cage limit sample contacts the spherical recess 26. This causes probes A4 and B24 to contact the inner spherical surface 32 of the cage, respectively. Simultaneously, probes A13 and B15 rotate around axes A7 and B22, respectively, causing the contact 18 on the dial indicator to interact with probes A13 and B15. The relative motion causes a change in the pointer reading of dial indicator 20. Mark the pointer reading ranges (upper and lower limits) corresponding to the two cage limit samples. Remove the cage limit samples and place the cage to be measured into the spherical recess 29 of the locator, ensuring that the outer spherical surface 33 of the cage contacts the spherical recess 26, and that probes A4 and B24 contact the inner spherical surface 32 of the cage. The pointer reading of dial indicator 20 will then change. If the pointer reading of dial indicator 20 is within the marked range, the inner spherical diameter of the cage at the measured point is qualified; otherwise, it is unqualified and needs adjustment. The cage can be rotated in the spherical recess 26, allowing measurement of the desired inner spherical diameter at any position. Simply bring the two points to be measured into contact with probes A4 and B24.

Claims

1. A drive shaft retainer inner ball diameter gauge, characterized by: The utility model relates to a kind of measuring device, including support (27), workbench plate (28), workbench plate (28) is fixed with support (27), workbench plate (28) is fixed with support (6), positioner (1), workbench plate (28) is equipped with reaming (30), the support (6) is fixed with rotating shaft A (7), measuring rod A (13) is rotatably connected in rotating shaft A (7), one end of measuring rod A (13) is detection connection end A (3), detection connection end A (3) is perpendicular to measuring head A (4) and measuring rod A (13) and is fixed, the other end of measuring rod A (13) is equipped with screw hole A (10) and long slot (14), the support (6) is fixed with rotating shaft B (22), measuring rod B (15) is rotatably connected in rotating shaft B (22), one end of measuring rod B (15) is detection connection end B (25), detection connection end B (25) is perpendicular to measuring head B (24) and measuring rod B (15) and is fixed, the other end of measuring rod B (15) is equipped with screw hole B (16), the front end of meter rod (19) of micrometer (20) is contact (18), meter rod (19), contact (18) pass through the hole of measuring rod B (15), meter rod (19) and measuring rod B (15) are fastened by screw (21) being equipped on the hole wall, screw (9) is screw-connected and passes through screw hole A (10), and its end surface is in contact with the contact (18) of micrometer (20), the other end of screw (9) is screw-connected with nut B (8), bolt (11) one end passes through long slot (14) on measuring rod A (13) and is screw-connected with screw hole B (16) of measuring rod B (15), the end of bolt (11) has screw-connected nut A (17), spring (12) is sleeved on bolt (11), and is located between measuring rod A (13) and bolt cap, the positioner (1) is equipped with spherical recess (26), square slot (2), recess A (5), recess B (23), square slot (2) is opposite to reaming (30) on workbench plate (28), measuring head A (4) is opposite to recess A (5), measuring head B (24) is opposite to recess B (23), the axis extension line of measuring head A (4) passes through the spherical recess ball center (29) of positioner (1) and coincides with the axis extension line of measuring head B (24).

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