Detection instrument for inner sphere diameter of transmission shaft retainer

Abstract

The invention 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] The invention relates to an instrument for measuring inner ball diameter, in particular to an instrument for detecting inner ball diameter of a retaining frame of a fixed end section and a movable end section of a transmission shaft of a car constant velocity universal joint. 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 inner spherical surface of the retainer matches the outer spherical surface of the inner ring or the outer surface of the inner sleeve. The inner spherical surface of the retainer is mainly completed by grinding finishing. In particular, the dimensional accuracy of the inner spherical surface of the retainer of the fixed end joint is high. If the dimensional accuracy of the inner spherical surface of the retainer is unqualified, the inner spherical surface of the retainer and the outer spherical surface of the inner ring will not meet the technical specifications, which is easy to wear, shortening the service life of the retainer and the inner ring, and causing abnormal noise. In the past, the inner diameter of the ball in the cage was measured with an internal diameter dial indicator, but it is not easy to accurately measure the ball diameter passing through the center of the ball, the measurement has errors, the measurement time is long, the efficiency is low, and the measured values ​​are different due to human factors. More importantly, sometimes the wrong value is read, which will lead to batch scrapping and great waste. Therefore, an instrument that can measure the inner ball diameter of the cage efficiently and conveniently and can ensure the 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 retainer inner ball diameter detector. When the inner ball diameter of the retainer is measured using this technology, it is not only convenient to measure, but also can ensure the detection accuracy of the inner ball diameter of the retainer.

[0004] The technical scheme of the present invention is: a ball diameter detector for a transmission shaft retainer, comprising a pillar and a workbench, the workbench is fixedly connected to the pillar, a bracket and a positioner are fixedly mounted on the workbench, a reamer is provided on the workbench, a rotating shaft A is fixedly mounted on the bracket, 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, the detection connection end A is perpendicular to and fixedly connected to the measuring head A and the measuring rod A, a threaded hole A and a long notch are provided on the other end of the measuring rod A, a rotating shaft B is fixedly mounted on the bracket, the 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 fixedly connected to the probe B and the measuring rod B. The other end of the measuring rod B is provided with a threaded hole B. The front end of the dial gauge rod is a contact. The rod and the contact pass through the hole on the measuring rod B. The rod and the measuring rod B are fastened by a screw arranged on the hole wall. The screw spirally passes through the threaded hole A and its end face contacts the contact on the dial gauge. The other end of the screw is spirally connected with the nut B. One end of the bolt passes through the long slot on the measuring rod A and is spirally connected with the threaded hole B of the measuring rod B. The end of the bolt is provided with a spirally connected nut A. The spring is sleeved on the bolt and is located between the measuring rod A and the bolt cap. The positioner is provided with a spherical socket, a square slot, a groove A, and a groove B. The square slot is opposite to the expanded hole on the workbench, the probe A is opposite to the groove A, the probe B is opposite to the groove B, and the axial extension line of the probe A coincides with the axial extension line of the probe B through the spherical socket center of the positioner.

[0005] The principle of the present invention is: using the comparison method, a retainer that meets the limit sample requirements after three-coordinate measurement of the inner ball diameter is burned with a mark as a retainer limit sample, and two retainer limit samples are respectively placed in the spherical recesses of the positioner, so that the probe A and the probe B are respectively in contact with the inner spherical surface of the retainer, then the pointer reading of the micrometer changes, and the pointer ranges corresponding to the two retainer limit samples are marked respectively, the retainer limit samples are removed, the retainer to be measured is placed in the spherical recesses of the positioner, and the probes A and the probes B are in contact with the inner spherical surface of the retainer, then the pointer reading of the micrometer changes, if the pointer reading of the micrometer is within the marked range, the inner ball of the retainer is qualified, otherwise it is unqualified and needs to be adjusted.

[0006] The advantages of the present invention are that the inner ball diameter of the cage can be measured quickly and accurately, which is not only efficient but also reliable in measuring results, thus avoiding the occurrence of batch waste. Since the spherical concave socket of the positioner of the instrument matches the outer spherical surface of the cage, the probe A and the probe B are relative to each other through the centers of the spherical concave socket, and the ball diameter passing through the center of the inner spherical surface of the cage can be accurately measured, thus avoiding the influence of human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the transmission shaft retainer inner ball diameter detector of the present invention.

[0008] Figure 2 yes Figure 1 AA section view.

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

[0010] Figure 4 yes Figure 3 Top view of the .

[0011] Figure 5 It is a schematic diagram of the working status of the transmission shaft cage inner ball diameter detector.

[0012] Figure 6 It is a schematic diagram of the structure of rotating shaft A and rotating shaft B.

[0013] In the figure: 1 locator, 2 square notch, 3 detection connection end A, 4 probe A, 5 groove mouth A, 6 bracket, 7 rotating shaft A, 8 nut B, 9 screw, 10 threaded hole A, 11 bolt, 12 spring, 13 measuring rod A, 14 long notch, 15 measuring rod B, 16 threaded hole B, 17 nut A, 18 contact, 19 gauge rod, 20 micrometer, 21 screw, 22 rotating shaft B, 23 groove mouth B, 24 probe B, 25 detection connection end B, 26 spherical socket, 27 pillar, 28 workbench, 29 spherical socket center, 30 expansion hole, 31 window, 32 inner spherical surface, 33 outer spherical surface. DETAILED DESCRIPTION

[0014] The transmission shaft retainer inner ball diameter detector is specifically a retainer inner ball diameter detector for the fixed end section and the movable end section of the transmission shaft of a car constant velocity universal joint. The retainer is a thin-walled part having an inner spherical surface 32 and an outer spherical surface 33, and usually having six or eight windows 31 for keeping the steel balls on the same cross section. The inner wall of the spherical recess 26 on the positioner of the present invention is designed to match the outer spherical surface of the retainer, and the probe A and the probe B are opposite to each other through the center of the spherical recess. The probe A and the probe B can accurately measure the ball diameter passing through the center of the inner spherical surface of the retainer. The technical scheme of the detector of the present invention is shown in the attached drawings. Figure 1-6As shown, it includes a pillar 27 and a workbench 28, the workbench 28 is fixedly connected to the pillar 27, a bracket 6 and a positioner 1 are fixedly mounted on the workbench 28, a reamer 30 is provided on the workbench 28, a rotating shaft A7 is fixedly mounted on the bracket 6, a measuring rod A13 is rotatably connected to the rotating shaft A7, a detection connection end A3 is provided at one end of the measuring rod A13, the detection connection end A3 is perpendicular to and fixedly connected to the measuring head A4 and the measuring rod A13, a threaded hole A10 and a long slot 14 are provided at the other end of the measuring rod A13, a rotating shaft B22 is fixedly mounted on the bracket 6, a measuring rod B15 is rotatably connected to the rotating shaft B22, a detection connection end B25 is provided at one end of the measuring rod B15, and the detection connection end B25 is perpendicular to and fixedly connected to the measuring head B24 and the measuring rod B15. The other end of the measuring rod B15 is provided with a threaded hole B16. One end of the screw 9 is screwedly connected to the threaded hole A10 on the measuring rod A13. The nut B8 is screwedly connected to the screw 9. The dial rod 19 of the micrometer 20 passes through the hole on the measuring rod B15, and one end of the screw 21 passes through the hole wall on the measuring rod B15 and presses on the dial rod 19, so that the dial rod 19 is fixed on the measuring rod B15. The contact 18 on the micrometer contacts the end face of the screw 9. The bolt 11 passes through the long notch 14 on the measuring rod A13 and is screwedly connected to the threaded hole B16 on the measuring rod B15. The nut A17 is screwedly connected to the bolt 11. The spring 12 It is mounted on the bolt 11 and is located between the measuring rod A13 and the bolt cap. The positioner 1 is provided with a spherical concave socket 26, a square notch 2, a groove A5, and a groove B23. The square notch 2 is opposite to the reaming hole 30 on the workbench. The elastic force of the spring causes the measuring rod A13 to rotate around the rotation axis A7 and the measuring rod B15 to rotate around the rotation axis B22, so that the detection connection end A3 and the detection connection end B25 are in contact with the two ends of the square notch 2, thereby making the measuring head 4 and the measuring head 24 in a working measurement state. The function of the square notch 2 is to make the detection connection end A3 and the detection connection end B25 located in the square notch and limit the position of the detection connection end A3 and the detection connection end B25 When the measuring rod A13 and the measuring rod B15 rotate around the rotating shaft A7 and the rotating shaft B22 respectively, the long groove plays a role of giving way, the role of the reaming hole 30 is to facilitate cleaning the inner surface of the spherical socket, and the dirt can easily fall through the reaming hole from the square groove. The probe A4 is opposite to the groove mouth A5, and the probe B24 is opposite to the groove mouth B23. The role of the groove mouth A5 and the groove mouth B23 is to facilitate the placement of the retaining frame into the spherical socket and make the probe contact with the inner spherical surface of the retaining frame. The probe A4 and the probe B24 are opposite to each other through the spherical socket center 29 of the locator, that is, the axis extension line of the probe A4 coincides with the axis extension line of the probe B24 through the spherical socket center 29 of the locator.

[0015] The working process of the present invention is as follows: first, a holder whose inner ball diameter value after three-coordinate measurement meets the limit sample requirement is burned with a mark as a holder limit sample, and two holder limit samples are respectively placed in the spherical concave socket 26 of the positioner 1, and the outer spherical surface 33 of the holder limit sample is in contact with the spherical concave socket 26, so that the probe A4 and the probe B24 are in contact with the inner spherical surface 32 of the holder respectively, and at the same time, the probe A13 and the probe B15 rotate around the rotation axis A7 and the rotation axis B22 respectively, and the contact 18 on the micrometer generates a contact with the probe A13 and the probe B15. The relative movement of the micrometer 20 changes the pointer reading, marks the pointer range (upper and lower readings) corresponding to the two limit samples of the cage, removes the limit sample of the cage, puts the cage to be measured into the spherical center 29 of the positioner, and makes the outer spherical surface 33 of the cage contact with the spherical cavity 26, makes the probe A4 and probe B24 contact with the inner spherical surface 32 of the cage, then the pointer reading of the micrometer 20 changes. If the pointer reading of the micrometer 20 is within the marked range, the inner ball diameter of the cage at the measured point is qualified, otherwise it is unqualified and needs to be adjusted. The cage can be rotated in the spherical cavity 26, so the inner ball diameter to be measured at any position can be measured, and it is only necessary to make the two points to be measured contact with the probe A4 and probe B24.

Claims

1. Transmission shaft cage inner ball diameter detector, characterized by: The invention comprises a support (27) and a workbench (28), wherein the workbench (28) is fixedly connected to the support (27), a bracket (6) and a positioner (1) are fixedly mounted on the workbench (28), a reamer (30) is provided on the workbench (28), a rotating shaft A (7) is fixedly mounted on the support (6), a measuring rod A (13) is rotatably connected to the rotating shaft A (7), one end of the measuring rod A (13) is a detection connection end A (3), the detection connection end A (3) is vertically connected to the measuring head A (4) and the measuring rod A (13), the other end of the measuring rod A (13) is provided with a threaded hole A (10) and a long slot (14), a rotating shaft B (22) is fixedly mounted on the support (6), a measuring rod B (15) is rotatably connected to the rotating shaft B (22), one end of the measuring rod B (15) is a detection connection end B (25), The detection connection end B (25) is vertically connected to the measuring head B (24) and the measuring rod B (15), and the other end of the measuring rod B (15) is provided with a threaded hole B (16). The front end of the measuring rod (19) of the micrometer (20) is a contact (18). The measuring rod (19) and the contact (18) pass through the hole on the measuring rod B (15). The measuring rod (19) and the measuring rod B (15) are fastened by a screw (21) provided on the hole wall. The screw (9) is spirally connected and passes through the threaded hole A (10). The end face thereof contacts the contact (18) on the micrometer (20). The other end of the screw (9) is spirally connected to the nut B (8). One end of the bolt (11) passes through the long slot (14) on the measuring rod A (13) and is connected to the measuring rod B (15). ) is spirally connected to the threaded hole B (16) of the workbench (28), the end of the bolt (11) is provided with a nut A (17) which is spirally connected, the spring (12) is sleeved on the bolt (11) and is located between the measuring rod A (13) and the bolt cap, the locator (1) is provided with a spherical concave socket (26), a square notch (2), a groove opening A (5), and a groove opening B (23), the square notch (2) is opposite to the expansion hole (30) on the workbench (28), the probe A (4) is opposite to the groove opening A (5), the probe B (24) is opposite to the groove opening B (23), and the axis extension line of the probe A (4) passes through the spherical concave socket ball center (29) of the locator (1) and coincides with the axis extension line of the probe B (24).

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