Position degree detector for inner sleeve ball groove of transmission shaft

Abstract

A transmission shaft inner sleeve ball groove position degree detector comprises a support A, a support B, a support C and a positioning column which are installed on a working table, a guide rod A is installed on the support A, one end of the guide rod A is in threaded connection with a nut A, the other end of the guide rod A is fixedly connected with a steel ball A, a cylindrical boss A is arranged on the guide rod A, a spring A is installed on the guide rod A in a sleeved mode and located between the cylindrical boss A and the support A, and a guide rod B is installed on the support B and fixedly connected with the guide rod A. One end of the guide rod B is provided with a nut B in threaded connection, and the other end of the guide rod B is fixedly connected with the steel ball B. The guide rod B is provided with a cylindrical boss B in fixed connection. The guide rod B is sleeved with the spring B and located between the cylindrical boss B and the support B. The steel ball A and the steel ball B are opposite to the center line of the positioning column. The support C is provided with a dial gauge, and the end of a gauge rod of the dial gauge is provided with a measuring head. When the technology is used for measuring the position degree of the inner sleeve fairway, the adjustment is convenient, the efficiency is high, and the detection precision of the position degree of the inner sleeve fairway can be ensured.

Description

Technical Field

[0001] The invention relates to a transmission shaft inner sleeve ball track position detection instrument, in particular to a vehicle transmission shaft inner sleeve ball track position detection tool. 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 ballway of the inner sleeve is matched with the ballway of the outer sleeve through the steel ball. The ballway of the inner sleeve is completed by hard milling or grinding. The precision requirement is high. If the symmetrical position accuracy of the plane where each pair of relative ballways of the inner sleeve is located and the center of rotation of the outer surface is unqualified, it will cause the inner sleeve ballway to be matched with the outer sleeve ballway through the steel ball. It does not meet the technical specification requirements, is easy to wear, shortens the service life of the inner sleeve, and is stuck and causes abnormal noise. In the past, the ballway position of the inner sleeve was measured by three-coordinate measurement, but the measurement cycle was long and the efficiency was low. The 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. At the same time, a considerable number of companies believed that the ballway position of the inner sleeve was guaranteed by program or fixture processing. In fact, with the change of equipment accuracy, fixture wear and adjustment errors, and blade wear, the ballway position of the inner sleeve has an out-of-tolerance situation, and it is a potential defect that is difficult to find. The out-of-tolerance of the ballway position will directly lead to the assembly of the mobile end section being stuck and making abnormal noises, and production needs to be stopped to wait for the problem to be solved. Therefore, an instrument that can measure the ballway position of the inner sleeve efficiently and conveniently 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 inner sleeve ball track position detector. When using this technology to measure the inner sleeve ball track position, it is not only convenient to adjust and efficient, but also can ensure the detection accuracy of the inner sleeve ball track position.

[0004] The technical solution of the present invention is: a transmission shaft inner sleeve ball track position detector, including a workbench, a bracket A, a bracket B, a bracket C, and a positioning column are fixedly installed on the workbench, the bracket A is provided with a hole A, a guide rod A with a sliding connection is installed in the hole A, the two ends of the guide rod A are placed outside the hole A, one end of the guide rod A is provided with a nut A with a threaded connection, and the other end is fixedly connected to the steel ball A, the guide rod A is provided with a cylindrical boss A, a spring A is sleeved on the guide rod A and is located between the cylindrical boss A and the bracket A, the bracket B is provided with a hole B, a sliding A connected guide rod B, both ends of which are placed outside the hole B, one end of which is equipped with a threaded nut B, and the other end is fixedly connected to the steel ball B. A fixedly connected cylindrical boss B is provided on the guide rod B, and a spring B is sleeved on the guide rod B and located between the cylindrical boss B and the bracket B. The steel balls A and B are opposite to the center line of the positioning column. A micrometer is installed on the bracket C, and a through hole is provided on the bracket C. The part of the micrometer rod passing through the through hole is fastened by the screw on the bracket C, and a probe is provided at the end of the rod, and the probe is opposite to the center line of the positioning column.

[0005] A gasket is arranged between the workbench plate and the positioning column, and the height of the inner sleeve can be adjusted by selecting the gasket with suitable thickness.

[0006] The principle of the present invention is to sleeve the inner hole of the inner sleeve on the positioning column, and make a pair of relative ballways thereof face the steel ball A and the steel ball B. Under the elastic force of the spring, the steel ball A and the steel ball B contact the pair of ballways, and the probe of the micrometer contacts the outer surface of the inner sleeve. Then the pointer reading on the micrometer changes, and the pointer reading of the micrometer is recorded. The inner sleeve is rotated 180 degrees and sleeved on the positioning column again. Then the pointer reading on the micrometer changes, and the pointer reading of the micrometer at this time is recorded, and the difference between the two readings is recorded. Similarly, the remaining two pairs of relative ballways are measured according to the above method, and the difference between the other two pairs of ballway measurements is recorded. If the difference between the three pairs is within the specified range of the design, the measurement result is qualified, otherwise it is unqualified and needs to be adjusted.

[0007] The advantages of the present invention are: it can quickly and accurately measure the position value of the inner sleeve ball track, which is not only efficient, but also reliable in measurement results, reduces the scrap rate, and liberates the three coordinates; the instrument eliminates potential invisible quality problems and avoids the phenomenon of stopping production waiting for the problem to be solved; because the positioning column is made according to the inner hole gauge of the inner sleeve, when detecting the position value of the inner sleeve ball track, it also detects whether the inner hole of the inner sleeve is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of a transmission shaft inner sleeve ball track position detector.

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

[0010] Figure 3 It is a structural diagram of the inner sleeve.

[0011] Figure 4 yes Figure 3 Top view of the .

[0012] Figure 5 yes Figure 4 CC section view in .

[0013] Figure 6 It is a schematic diagram of the working status of the ring track position detector inside the transmission shaft.

[0014] Figure 7 yes Figure 6 Schematic diagram of the structure when the inner sleeve ball track contacts the steel ball.

[0015] Figure 8 It is a schematic diagram of the working state of the ball track position detector inside the transmission shaft from a top view.

[0016] In the figure: 1 pillar, 2 workbench, 3 bracket A, 4 nut A, 5 hole A, 6 spring A, 7 cylindrical boss A, 8 guide rod A, 9 steel ball A, 10 positioning column, 11 gasket, 12 steel ball B, 13 guide rod B, 14 cylindrical boss B, 15 spring B, 16 bracket B, 17 hole B, 18 nut B, 19 probe, 20 bracket C, 21 micrometer, 22 through hole, 23 screw, 24 gauge rod, 25 ballway, 26 outer surface, 27 inner hole, 28 contact point, 29 top gap, 30 ellipse. DETAILED DESCRIPTION

[0017] The transmission shaft inner sleeve ball track position detector of the present invention is a detection tool for the ball track position of the inner sleeve of the transmission shaft of a car constant velocity universal joint. The following is an embodiment of the present invention in conjunction with the accompanying drawings. The technical scheme includes a pillar 1 and a workbench 2, and the workbench is fixedly connected to the pillar 2; a bracket A3, a bracket B16, a bracket C20, and a positioning column 10 are fixedly installed on the workbench, and a gasket 11 is installed between the workbench and the positioning column 10. The bracket A3 is provided with a hole A5, and a guide rod A8 is installed on the bracket A3. The guide rod A8 is slidably connected with the hole A5. Both ends of the guide rod A8 are placed outside the hole A, and one end is provided with a thread. A spirally connected nut A4 is installed on the end thread of the guide rod A8. The other end of the guide rod A8 is fixedly connected with a steel ball A9, and a cylindrical boss A7 is provided on the guide rod A8. A spring A6 is sleeved on the guide rod A8 and is located between the cylindrical boss A7 and the bracket A3. The bracket B16 is provided with a hole B17, and a guide rod A8 is installed on the bracket B16. The guide rod B13 is slidably connected with the hole B17, the two ends of the guide rod B13 are placed outside the hole B17, one end of the guide rod B13 is provided with a thread, and a spirally connected nut B18 is installed on the end thread of the guide rod B13. The other end of the guide rod B13 is fixedly connected with the steel ball B12, and a cylindrical boss B14 is provided on the guide rod B13. The spring B15 is sleeved on the guide rod B13 and is located between the cylindrical boss B14 and the bracket B16. The steel ball A9 and the steel ball B12 are opposite to the center line of the positioning column 10. The bracket C20 is provided with a through hole 22, and a micrometer 21 is installed on the bracket C20. The dial gauge rod 24 passes through the through hole 22 and is fastened by the screw 23 on the bracket C20. The dial gauge rod 24 is provided with a probe 19, and the probe is opposite to the center line of the positioning column 10.

[0018] The inner sleeve described in the present invention usually has six ballways 25, and two adjacent ballways intersect at a certain angle. The inner sleeve is provided with an inner hole 27 and an outer surface 26. The cross section of the inner sleeve ballway is an ellipse 30. When the steel ball A9 or the steel ball B12 contacts the ballway 25 of the inner sleeve, there are two contact points 28 with the ellipse ballway 25. There is a gap between the steel ball and the ellipse ballway 25, which is usually called a top gap 29. The cross section of the inner sleeve ballway 25 adopts an ellipse shape for the following purposes: first, the steel ball and the ellipse ballway 25 have two contact points 28, which are more stable and wear-resistant; second, the top gap 29 between the steel ball and the ellipse ballway 25 can facilitate the entry of grease, making lubrication more sufficient and wear-resistant. The functions of the spring A6 and the spring B15 are: when the inner sleeve is mounted on the positioning column 10, the guide rod A8 and the guide rod B13 give way at the same time, so that the spring A6 and the spring B15 are compressed, pushing the steel ball A9 and the steel ball B12 to contact the ballway 25.

[0019] The working process of the present invention is as follows: specifically, the inner hole 27 of the inner sleeve is sleeved on the positioning column 10, and a pair of relative ballways 25 are made to be opposite to the steel ball A9 and the steel ball B12. The steel ball A9 and the steel ball B12 are in contact with the pair of ballways 25 under the action of the spring A6 and the spring B15. The probe 19 of the micrometer 21 is in contact with the outer surface 26 of the inner sleeve, then the pointer reading on the micrometer 21 changes, and the pointer reading on the micrometer 21 is recorded. The inner sleeve is rotated 180 degrees and then sleeved on the positioning column 10. Then the pointer reading on the micrometer 21 changes, and the pointer reading on the micrometer 21 at this time is recorded, and the difference between the two readings is recorded. Similarly, the remaining two pairs of relative ballways 25 are measured according to the above method, and the difference between the other two pairs of ballway measurements is recorded. If the three pairs of differences are within the specified range of the design, the measurement result is qualified, otherwise it is unqualified and needs to be adjusted. Selecting a gasket 11 of appropriate thickness can adjust the height of the inner sleeve so that the two steel balls A9 and the steel ball B12 are at a height relative to the center of the inner sleeve; since the ball track 25 of the inner sleeve is elliptical, it can contact the steel ball A9 or the steel ball B12 at two points, making the contact more reliable and stable, and the measurement value more accurate.

Claims

1. Transmission shaft inner sleeve ball track position detector, characterized by: The invention comprises a workbench (2), on which a bracket A (3), a bracket B (16), a bracket C (20), and a positioning column (10) are fixedly mounted. The bracket A (3) is provided with a hole A (5), in which a guide rod A (8) is slidably mounted. Both ends of the guide rod A (8) are placed outside the hole A (5), one end of the guide rod A (8) is provided with a nut A (4) connected by a thread, and the other end is fixedly connected to a steel ball A (9). The guide rod A (8) is provided with a cylindrical boss A (7), and a spring A (6) is sleeved on the guide rod A (8) and is located between the cylindrical boss A (7) and the bracket A (3). The bracket B (16) is provided with a hole B (17), in which a guide rod B (13) is slidably mounted. Both ends of the guide rod B (13) are placed outside the hole B (17), and one end of the guide rod B (13) is provided with a nut connected by a thread. B (18), the other end of which is fixedly connected to the steel ball B (12), the guide rod B (13) is provided with a cylindrical boss B (14), the spring B (15) is sleeved on the guide rod B (13) and is located between the cylindrical boss B (14) and the bracket B (16), the steel ball A (9) and the steel ball B (12) are opposite to the center line of the positioning column (10), the bracket C (20) is equipped with a micrometer (21), the bracket C (20) is provided with a through hole (22), the part of the dial gauge rod (24) passing through the through hole (22) is fastened by a screw (23) on the bracket C (20), and the end of the rod (24) is provided with a probe (19), and the probe is opposite to the center line of the positioning column (10).

2. The transmission shaft inner sleeve ball track position detector according to claim 1, characterized in that: A gasket (11) is installed between the workbench (2) and the positioning column (10).

Images