Transmission shaft inner sleeve fairway interval different section detector
By using a cross-sectional detector for different spacing between inner sleeve ball tracks, and employing a combination of a bracket, sliding column, and dial indicator, rapid and accurate measurement of different spacing between inner sleeve ball tracks is achieved. This solves the problems of low detection efficiency and insufficient accuracy, and improves production efficiency and product quality.
Patent Information
- Application Number
- CN202520465342.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-18
AI Technical Summary
In the existing technology, the detection efficiency and accuracy of different cross sections of the ball track spacing of the inner sleeve of the constant velocity universal joint drive shaft in automobiles are low, leading to potential quality problems and production stoppage risks.
A cross-sectional detector for measuring different spacing between inner sleeve tracks of a drive shaft was designed. By using a combination of a bracket, a sliding column, a steel ball, and a dial indicator, the detector can quickly and accurately measure different spacing between inner sleeve tracks. The measurement accuracy is ensured by the close contact and displacement of the steel ball with the track, which drives the dial indicator pointer to read the value.
It improves the efficiency and accuracy of detecting different cross-sections of the inner ball track spacing, reduces the scrap rate, frees up coordinate measuring machine resources, and avoids potential quality problems and production stoppage risks.
Smart Images
Figure CN223925654U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a measuring instrument for the spacing between ball tracks, specifically a measuring instrument for different cross-sections of the ball track spacing inside a drive shaft. 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 ball tracks of the inner sleeve mate with the ball tracks of the outer sleeve through the steel balls. The ball tracks of the inner sleeve are finished by precision machining methods such as hard milling, grinding, or broaching, requiring high precision. If the dimensional difference between different cross-sections of the inner sleeve's ball track spacing is unacceptable, it indicates that the relative ball track taper of the inner sleeve is out of tolerance. This will cause the mating between the inner sleeve ball track and the outer sleeve ball track through the steel balls to fail to meet technical specifications, resulting in excessive clearance at one end, which can easily lead to abnormal noise and wear, shortening the service life of the inner sleeve. Previously, the spacing between inner sleeve tracks was measured using coordinate measuring machines (CMMs). However, this method was time-consuming, inefficient, and required production to stop while waiting for the CMM results, resulting in significant waste of CMM resources. Furthermore, many companies believed that the positional accuracy of the inner sleeve tracks was guaranteed by programming or fixture machining. However, in reality, variations in equipment precision, fixture wear and adjustment errors, and tool wear can lead to dimensional differences in the inner sleeve track spacing across different cross-sections. These differences can be substantial and difficult to detect, directly causing excessive clearance and abnormal noise at one end of the moving assembly, necessitating production stoppages while waiting for the problem to be resolved. Therefore, there is an urgent need for an instrument that can efficiently measure the dimensional differences in the inner sleeve track spacing across different cross-sections while ensuring measurement accuracy. Summary of the Invention
[0003] The purpose of this invention is to provide a detector for measuring the difference in cross-sections of the inner sleeve ball track spacing of a drive shaft. Using this technology, when measuring the dimensional difference of different cross-sections of the inner sleeve ball track spacing, it is not only convenient to adjust and highly efficient, but also ensures the accuracy of the dimensional difference detection.
[0004] The technical solution of this utility model is as follows: a cross-sectional detector for detecting different ball track spacing within a drive shaft, comprising a support column and a worktable. The worktable is fixedly connected to the support column. Supports A, B, and C are fixedly mounted on the worktable. The worktable has cylindrical holes, with a small cylindrical hole at the top and a concentric large cylindrical hole at the bottom. A stepped sliding column with slidable connection is installed inside the cylindrical holes. A spring A is fitted onto the stepped sliding column inside the large cylindrical hole. The upper end of spring A is pressed against the stepped end face of the large cylindrical hole, and the lower end of spring A is pressed against the stepped end face of the stepped sliding column. A positioning platform is fixedly connected to the top surface of the stepped sliding column, and the positioning platform is placed on the worktable surface. The bracket A is fixedly equipped with a detachable connecting rod, one end of which is fixedly connected to steel ball A. The bracket B is fixedly equipped with a detachable guide rod, one end of which is fixedly connected to steel ball B. A spring B is fitted on the guide rod between steel ball B and bracket B. The line connecting the centers of steel ball A and steel ball B intersects and is perpendicular to the center line of the stepped sliding column. The bracket C is fixedly equipped with a detachable dial indicator, the probe of which contacts the end face of the guide rod away from steel ball B. The side of the workbench is provided with a connected vertical groove, horizontal groove A, and horizontal groove B. A handle is fixedly connected to the stepped sliding column, and the handle is placed in the vertical groove, horizontal groove A, or horizontal groove B.
[0005] The bracket A has a hole A, one end of the connecting rod has a thread, the threaded end of the connecting rod passes through the hole A and is screwed to the nut A, and the other end of the connecting rod has a stepped cylinder, which is pressed against the bracket A.
[0006] The bracket B has a hole B, one end of the guide rod has a thread, the threaded end of the guide rod passes through the hole B and is screwed to the nut B (18), the other end of the guide rod has a cylindrical boss, and the spring B is fitted on the guide rod between the cylindrical boss and the bracket B.
[0007] The bracket C has a hole C through which the dial indicator rod passes, and the relative position between the dial indicator rod and the bracket C is fixed by a screw on the hole C.
[0008] The principle of this invention is as follows: The inner sleeve is placed on the positioning platform, with one pair of opposing ball tracks aligned with steel balls A and B. Under the force of spring B, steel balls A and B are in close contact with the ball tracks. When the ball tracks form the UU measurement section of the inner sleeve's ball tracks, steel ball B undergoes a corresponding displacement. The end face of the guide rod fixed to it pushes the probe of the dial indicator, causing a change in the dial indicator's reading. This reading is then recorded. The handle is then lifted and placed into the transverse groove B. The inner sleeve then slides through the stepped sliding column and the positioning platform... Move the platform a certain distance. At this point, the centers of steel balls A and B are located at the OO measurement section of the inner sleeve track. Steel ball B will produce a corresponding displacement. Record the dial indicator reading. Raise the handle and place it into the transverse groove A. The inner sleeve will move a certain distance via the stepped sliding column and the positioning platform. At this point, the centers of steel balls A and B are located at the DD measurement section of the inner sleeve track. Steel ball B will produce a corresponding displacement. Record the dial indicator reading. If the difference between the three measurements at different sections is within the design specifications, the measurement result is acceptable; otherwise, it is unacceptable and adjustment is required. Measure the other two pairs of opposite tracks of the inner sleeve using the same method…
[0009] The advantages of this invention are: it can quickly and accurately measure the dimensional differences of different cross sections of the inner ball track spacing, which is not only highly efficient but also provides reliable measurement results, reducing the scrap rate and freeing up the coordinate measuring machine; this instrument eliminates potential hidden quality problems and avoids the phenomenon of production stoppage while waiting for the problem to be solved. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of a tester for different cross-sectional spacing of the inner sleeve of the drive shaft.
[0011] Figure 2 yes Figure 1 Top view.
[0012] Figure 3 yes Figure 2 Sectional view along the AA direction.
[0013] Figure 4 This is a schematic diagram of the structure when the inner ball track comes into contact with the steel ball.
[0014] Figure 5 This is a schematic diagram of the inner sleeve.
[0015] Figure 6 yes Figure 5 Top view.
[0016] Figure 7 yes Figure 6 BB section view in the middle.
[0017] Figure 8 This is a schematic diagram for detecting the spacing between the inner UU cross sections of the ball track.
[0018] Figure 9 This is a schematic diagram of the handle position when testing the spacing between the inner UU cross-section ball tracks.
[0019] Figure 10 This is a top-view diagram showing the spacing between the inner sleeve cross-section and the ball track.
[0020] In the diagram: 1. Support column, 2. Handle, 3. Workbench, 4. Horizontal groove A, 5. Bracket A, 6. Nut A, 7. Hole A, 8. Connecting rod, 9. Stepped cylinder, 10. Steel ball A, 11. Positioning platform, 12. Steel ball B, 13. Guide rod, 14. Cylindrical boss, 15. Spring B, 16. Bracket B, 17. Hole B, 18. Nut B, 19. Screw, 20. Bracket C, 21. Dial indicator, 22. Indicator rod, 23. Probe, 24. Horizontal groove B, 25. Vertical groove, 26. Stepped sliding column, 27. Large cylindrical hole, 28. Small cylindrical hole, 29. Hole C, 30. Spring A, 31. Contact point, 32. Top clearance, 33. Ellipse, 34. Ball track, 35. Reference surface, 36. Inner hole, 37. U-U measuring section, 38. O-O measuring section, 39. D-D measuring section. Detailed Implementation
[0021] This utility model relates to a cross-sectional detector for detecting different spacing between the inner sleeve ball bearings of a driveshaft. It is a tool used for detecting the ball bearing spacing of the inner sleeve of a constant velocity universal joint driveshaft in automobiles. The following description, in conjunction with the attached... Figure 1-10The testing instrument includes a support column 1 and a worktable 3, which are fixedly connected to the support column. Supports A5, B16, and C20 are fixedly mounted on the worktable 3. The worktable 3 has a small cylindrical hole 28 and a large cylindrical hole 27, whose center lines coincide. A stepped sliding column 26 is composed of a small cylinder and a large cylinder. The small cylinder of the stepped sliding column 26 is slidably connected in the small cylindrical hole 28, and the large cylinder is slidably connected in the large cylindrical hole 27. A spring A30 is fitted onto the small cylinder and located in the large cylindrical hole 27. The step of the large cylindrical hole 27... The end face and the stepped end face of the large cylinder are limited. The upper end face of the small cylinder is fixedly connected to the positioning platform 11. Under the action of the spring A30, the positioning platform 11 is pressed against the worktable (3). The bracket A5 is provided with a hole A7. One end of the connecting rod 8 is provided with a thread. The thread passes through the hole A7 and is screwed to the nut A6. The connecting rod 8 is provided with a stepped cylinder 9. The stepped cylinder 9 is pressed against the bracket A5. The other end of the connecting rod 8 is fixedly connected to the steel ball A10. The bracket B16 is provided with a hole B17. The guide rod 13 is connected to the slide of the hole B17. One end of guide rod 13 is threaded, and the thread passes through hole B17 and is screwed to nut B18. The other end of guide rod 13 is fixed to steel ball B12. Guide rod 13 is provided with cylindrical boss 14. Spring B15 is fitted on guide rod 13 and is located between cylindrical boss 14 and bracket B16. The line connecting the centers of steel balls A10 and B12 passes through and is perpendicular to the center line of stepped sliding column 26. The bracket C20 is provided with hole C29. The dial indicator 21's rod 22 passes through hole C29 and is fixed by screw 19 on hole C29. The relative positions of the brackets C20, the probe 23 is provided on the rod 22, the probe is in contact with the end face of the threaded end of the guide rod 13, the side of the workbench 3 is provided with a vertical groove 25, a horizontal groove A4 and a horizontal groove B24, and a handle 2 is fixedly connected to the stepped slide column. When the handle is located at the lower part of the vertical groove 25, the center of the steel ball A10 and the steel ball B12 is located on the UU measurement section 37 of the inner ball track. When the handle is located in the horizontal groove B24, the center of the steel ball A10 and the steel ball B12 is located on the OO measurement section 38 of the inner ball track. When the handle is located in the horizontal groove A4, the center of the steel ball A10 and the steel ball B12 is located on the DD measurement section 39 of the inner ball track.
[0022] The inner sleeve of this utility model typically has six lanes 34, with adjacent lanes intersecting at a certain angle. The inner sleeve has an inner hole 36, and the cross-section of the inner sleeve lane is elliptical 33. When the steel ball A10 or steel ball B12 contacts the inner sleeve lane, there are two contact points 31 with the elliptical lane. There is a gap between the steel ball and the elliptical lane, usually called the top gap 32. The purpose of the elliptical cross-section 33 of the inner sleeve lane is twofold: firstly, the two contact points 31 between the steel ball and the elliptical lane make it more stable and wear-resistant; secondly, the top gap 32 between the steel ball and the elliptical lane allows grease to enter easily, resulting in more thorough lubrication and wear resistance.
[0023] The working process of this utility model is as follows: Place the handle 2 at the lower part of the vertical groove 25, place the inner sleeve to be measured on the positioning platform 11, and make the reference surface 35 of the inner sleeve contact the platform surface of the positioning platform 11, so that the pair of opposing ball tracks of the inner sleeve are opposite to the steel balls A10 and B12. Under the action of the spring B15, the steel balls A10 and B12 are in close contact with the pair of ball tracks, and the center of the steel balls A10 and B12 is located on the UU measuring section 37 of the inner sleeve ball track. The steel ball B is displaced laterally, and the end face of the guide rod 13 fixed to it pushes the probe 23 of the dial indicator 21 to move, so the pointer reading on the dial indicator changes. Record the dial indicator pointer reading; lift the handle 2 and... Place the handle into the transverse groove B24. The inner sleeve moves upward a certain distance via the stepped sliding column 26 and the positioning platform 11. At this time, the centers of steel balls A10 and B12 are located on the OO measuring section 38 of the inner sleeve's ball track. Steel ball B undergoes lateral displacement. Record the dial indicator reading. Raise the handle 2 and place it into the transverse groove A4. The inner sleeve moves upward a certain distance via the stepped sliding column 26 and the positioning platform 11. At this time, the centers of steel balls A10 and B12 are located on the DD measuring section 39 of the inner sleeve's ball track. Steel ball B undergoes lateral displacement again. Record the dial indicator reading. If the difference between the three measurements is within the design specifications, the measurement result is qualified; otherwise, it is unqualified and adjustment is required. Measure the other two pairs of opposite ball tracks of the inner sleeve using the same method… After measuring the spacing between different cross sections of the inner sleeve's two opposing lanes, remove handle 2 from the horizontal groove A4. Under the elastic force of spring A30, handle 2 returns to the lower part of the vertical groove A25, and then the next lane measurement is performed. Throughout the measurement process, raising handle 2 ensures that the inner sleeve's reference surface 35 remains in contact with the positioning table 11, guaranteeing accurate measurement values.
Claims
1. A cross-sectional detector for measuring the spacing between the inner sleeves of the drive shaft, comprising a support column (1) and a worktable (3), wherein the worktable is fixedly connected to the support column, and brackets A (5), B (16), and C (20) are fixedly mounted on the worktable (3), characterized in that: The workbench (3) has a cylindrical hole, the upper part of which is a small cylindrical hole (28), and the lower part is a concentric large cylindrical hole (27). A stepped sliding column (26) with sliding connection is installed in the cylindrical hole. A spring A (30) is fitted on the stepped sliding column (26) installed in the large cylindrical hole (27). The upper end of the spring A (30) is pressed against the stepped end face of the large cylindrical hole, and the lower end of the spring A (30) is pressed against the stepped end face of the stepped sliding column (26). A positioning table (11) is fixedly connected to the top surface of the stepped sliding column (26). The positioning table (11) is placed on the table surface of the workbench (3). A detachable connecting rod (8) is fixedly installed on the bracket A (5). One end of the connecting rod (8) is fixedly connected to the steel ball A (10). A detachable connecting rod (8) is fixedly installed on the bracket B (16). A guide rod (13) is fixedly connected to a steel ball B (12) at one end. A spring B (15) is fitted on the guide rod (13) between the steel ball B (12) and the bracket B (16). The line connecting the centers of the two balls A (10) and B (12) intersects and is perpendicular to the center line of the stepped sliding column (26). A detachable dial indicator (21) is fixedly mounted on the bracket C (20). The probe (23) of the dial indicator contacts the end face of the guide rod (13) away from the steel ball B (12). The side of the workbench (3) is provided with a vertical groove (25), a horizontal groove A (4) and a horizontal groove B (24) that are connected. A handle (2) is fixedly connected on the stepped sliding column (26). The handle (2) is placed in the vertical groove (25) or in the horizontal groove A (4) or in the horizontal groove B (24).
2. The instrument for detecting different cross-sectional spacing of the inner sleeve ball track of the transmission shaft according to claim 1, characterized in that: The bracket A (5) is provided with a hole A (7), one end of the connecting rod (8) is provided with a thread, the threaded end of the connecting rod (8) passes through the hole A (7) and is screwed to the nut A (6), and the other end of the connecting rod (8) is provided with a stepped cylinder (9), which is pressed against the bracket A (5).
3. The instrument for detecting different cross-sectional spacing of the inner sleeve ball track of the transmission shaft according to claim 1, characterized in that: The bracket B (16) is provided with a hole B (17), one end of the guide rod (13) is provided with a thread, the threaded end of the guide rod passes through the hole B (17) and is screwed to the nut B (18), the other end of the guide rod (13) is provided with a cylindrical boss (14), and the spring B (15) is fitted on the guide rod (13) between the cylindrical boss (14) and the bracket B (16).
4. The instrument for detecting different cross-sectional spacing of the inner sleeve ball track of the transmission shaft according to claim 1, characterized in that: The bracket C (20) is provided with a hole C (29), the dial indicator (21) rod (22) passes through the hole C (29), and the relative position between the dial indicator rod (22) and the bracket C (20) is fixed by a screw (19) on the hole C (29).