Overrun clutch special-shaped wedge block lift measuring device and measuring method

Abstract

The invention relates to an overrun clutch special-shaped wedge lift measuring device and a measuring method, the overrun clutch special-shaped wedge lift measuring device comprises a clamping mechanism, a driving mechanism and a measuring mechanism, the clamping mechanism comprises a fixed raceway surface, a front fixed arm, a rear fixed arm, two clamping tools, a floating raceway surface, a guide column guide sleeve, a lifting platform, a lifting self-locking screw and a first servo motor; a lifting self-locking screw rod and a first servo motor are arranged at the lower end of the lifting platform, and the first servo motor drives the lifting self-locking screw rod to drive the lifting platform to ascend or descend, so that the floating raceway surface connected with the lifting self-locking screw rod is matched with the fixed raceway surface to complete clamping and positioning of the wedge block in the vertical direction. The invention discloses a method for measuring the lift of a special-shaped wedge block of an overrun clutch. The method comprises a clamping link A and a measuring link B, the special-shaped wedge lift measuring device is ingenious in design, simple in structure, convenient to use and capable of measuring the lift of special-shaped wedges of different models, the measuring process is greatly simplified, the measuring result is accurate, and compared with the prior art, the special-shaped wedge lift measuring device has good market prospects and development space.

Description

Technical Field

[0001] The invention relates to the technical field of overrunning clutch, a universal component of mechanical transmission, and in particular to a device and a method for measuring the lift of a special-shaped wedge of an overrunning clutch. Background Art

[0002] Overrunning clutches are widely used in the aviation field because they can achieve unidirectional torque transmission. The wedge of the overrunning clutch has two working arc surfaces. Generally, the upper working arc surface is a circular arc surface with a single radius, and the lower working arc surface is a spliced ​​circular arc surface with two different radii. The distance between the two working arc surfaces (i.e. the height of the wedge) is divided into a long end and a short end. When the input speed is greater than or equal to the output, the long end of the wedge works to wedge the input and output parts tightly to achieve the function of transmitting torque. When the input speed is less than the output, the short end of the wedge works to disengage the input and output parts and no longer transmit torque.

[0003] The wedge lift is the height change in the radial direction of the wedge due to the angle change from the initial contact position to the limit position, that is, the height difference between the long end and the initial contact state. It is one of the important geometric parameters of the overrunning clutch, which is related to the limit load capacity of the overrunning clutch and plays a vital role in the function realization of the overrunning clutch. At present, there is a lack of measurement methods for the lift of the special-shaped wedge of the overrunning clutch.

[0004] How to design a device and method for measuring the lift of special-shaped wedges of an overrunning clutch, which has an ingenious design, simple structure, and is easy to use, can measure the lift of special-shaped wedges of different models, greatly simplifies the measuring process, and has accurate measuring results, is a problem that needs to be solved at present. Summary of the invention

[0005] In order to solve the problems of lack of existing measuring devices and methods for the lift of special-shaped wedge blocks of overrunning clutches and inaccurate measurement results, the present invention provides a measuring device and method for the lift of special-shaped wedge blocks of overrunning clutches, which have ingenious design, simple structure, and easy use. The lift of special-shaped wedge blocks of different models can be measured, the measuring process is greatly simplified, and the measuring result is accurate.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a lift measuring device for the special-shaped wedge block of an overrunning clutch, the measuring device comprising a clamping mechanism, a driving mechanism and a measuring mechanism, the clamping mechanism comprising a fixed raceway surface, two front and rear fixed arms, two clamping fixtures, a floating raceway surface, a guide column and a guide sleeve, a lifting platform, a lifting self-locking screw and a first servo motor, the floating raceway surface is arranged directly below the fixed raceway surface, the clamping fixture is respectively connected between the fixed raceway surface and the floating raceway surface through the front and rear fixed arms, and the lifting platform is fixed to the lower end of the floating raceway surface through the guide column and the guide sleeve; the lower end of the lifting platform is provided with a lifting self-locking screw and a first servo motor, the first servo motor drives the lifting self-locking screw to drive the lifting platform to lift or lower, so that the floating raceway surface connected thereto cooperates with the fixed raceway surface to complete the clamping and positioning of the wedge block in the vertical direction.

[0007] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, a square pin hole is opened at the upper part of the fixed arm, and the square pin hole is provided with a square pin column for limiting and fixing the raceway surface; a circular pin hole is opened at the lower part of the fixed arm, and the circular pin hole is provided with a circular pin column for facilitating the rotation of the clamping tooling.

[0008] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the clamping tool includes a clamping tool groove arc surface, a clamping tool groove bottom surface, and a clamping tool short shaft, wherein the clamping tool groove arc surface is perpendicular to the clamping tool groove bottom surface, the arc surface shape of the clamping tool groove arc surface matches the shape of the special-shaped wedge, and the clamping tool short shaft is matched with the circular pin hole opened at the lower part of the fixed arm for use.

[0009] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the two clamping fixtures are installed symmetrically front and back, and the arc surface of the clamping fixture groove and the bottom surface of the clamping fixture groove on the clamping fixture are consistent with the two side surfaces of the special-shaped wedge. The two cooperate to axially and circumferentially position the special-shaped wedge to achieve clamping of the special-shaped wedge.

[0010] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the number of the guide posts and guide sleeves is four, and a coil spring is arranged inside each guide post and guide sleeve so that the floating raceway surface is parallel to the lifting platform, and the coil spring is compressed to generate a certain preload force, so that the special-shaped wedge can always be clamped in the vertical direction, and when the driving mechanism pushes the wedge to rotate, the floating raceway surface has sufficient downward space.

[0011] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the driving mechanism is arranged on one side of the clamping fixture, and the driving mechanism includes a second servo motor and a driving rod located at the output end of the second servo motor. The driving rod can move left and right under the drive of the second servo motor, and the driving rod drives the special-shaped wedge to rotate from the initial state to the long end to the extreme state position.

[0012] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the measuring mechanism includes a micrometer, a displacement sensor and a data acquisition system. The micrometer and the displacement sensor are both arranged between the floating raceway surface and the lifting platform. The micrometer and the displacement sensor measure the descending distance of the floating raceway surface during the rotation of the special-shaped wedge from the starting state to the long end state. The maximum distance value of the descent of the floating raceway surface is the lift of the special-shaped wedge.

[0013] As a further optimization solution of the above-mentioned overrunning clutch special-shaped wedge lift measuring device, the fixed raceway surface and the floating raceway surface are both in contact with the working arc surface of the special-shaped wedge.

[0014] A method for measuring the lift of a special-shaped wedge of an overrunning clutch comprises a clamping step A and a measuring step B. The clamping step A comprises the following steps: The first step is to connect a fixed arm to a fixed raceway surface, assemble a clamping fixture to the fixed arm, and then install the special-shaped wedge into the clamping fixture; it is necessary to ensure that the side arc surface of the special-shaped wedge fits with the arc surface of the clamping fixture groove, the end surface of the special-shaped wedge fits with the bottom surface of the clamping fixture groove, the working arc surface on the special-shaped wedge contacts with the fixed raceway surface, and when the clamping fixture drives the special-shaped wedge to rotate smoothly without obvious resistance, the working arc surface on the special-shaped wedge does not separate from the fixed raceway surface; The second step is to assemble the clamping tooling with the special-shaped wedge block; it is necessary to ensure that the side arc surface of the special-shaped wedge block fits with the arc surface of the clamping tooling groove, and the end surface of the special-shaped wedge block fits with the bottom surface of the clamping tooling groove; The third step is to assemble another fixed arm with the fixed raceway surface and the clamping fixture; it is necessary to ensure that the fixed arm is fixedly connected with the fixed raceway surface; The fourth step is to drive the lifting self-locking screw by the first servo motor to lift the floating raceway surface to clamp the special-shaped wedge in the vertical direction, and adjust the special-shaped wedge to the initial position. At this time, the distance between the floating raceway surface and the fixed raceway surface is H, which is the height of the wedge. It is necessary to ensure that the spiral spring in the guide column and guide sleeve is properly compressed, with a certain preload force to clamp the special-shaped wedge, and there is enough space for the drive mechanism to push the special-shaped wedge to fall. Measurement step B includes the following steps: The first step is to bring the micrometer into contact with the floating raceway surface and adjust it to zero, and at the same time connect the displacement sensor to the data acquisition system to measure the displacement of the floating raceway surface; In the second step, the second servo motor is turned on to drive the driving rod to move slowly and evenly to the right, contact the special-shaped wedge and drive the special-shaped wedge to rotate a certain angle. The downward movement of the floating raceway surface collected by the micrometer or displacement sensor continues to increase. When the downward movement suddenly decreases, the second servo motor is turned off. The data with the largest downward movement is the measured value of the lift of the special-shaped wedge. In the third step, the second servo motor drives the driving rod to move to the left, leaving the special-shaped wedge and keeping a proper distance. The first servo motor drives the floating raceway surface to descend, leaving the special-shaped wedge and keeping a proper distance to ensure the operating space for disassembling and re-clamping the new special-shaped wedge.

[0015] As a further optimization scheme of the above-mentioned method for measuring the lift of the special-shaped wedge of the overrunning clutch, when it is necessary to measure other special-shaped wedges of the same model, the clamping fixture and the fixed arm assembled with it are disassembled, the special-shaped wedge that has been measured is taken out, and a new special-shaped wedge is installed, and the subsequent steps continue from the second step of the clamping link A.

[0016] As a further optimization scheme of the above-mentioned overrunning clutch special-shaped wedge lift measurement method, when it is necessary to measure other types of special-shaped wedges, replace the fixed arm and clamping tooling that match the special-shaped wedge of this model, and the subsequent steps can start from the first step of clamping link A.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The measuring device of the present invention has the characteristics of simple structure and convenient use, and the measuring method of the present invention is simple to operate and easy to implement; 2. The clamping of the special-shaped wedge of the overrunning clutch is very stable in the present invention, thus eliminating some measurement errors caused by human factors and achieving higher measurement accuracy; 3. The present invention can meet the lift measurement requirements of all types of special-shaped wedges by changing the clamping fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the measuring device of the present invention; Figure 2 It is a side view schematic diagram of the structure of the measuring device of the present invention; Figure 3 This is a schematic diagram of the main structure of the fixed arm; Figure 4 It is a schematic diagram of the cross-sectional structure of the fixed arm AA; Figure 5 Schematic diagram of the main structure of the clamping fixture; Figure 6 Schematic diagram of the cross-sectional structure of the clamping fixture BB; Figure 7 It is a schematic diagram of the special-shaped wedge structure of the overrunning clutch.

[0019] Figure markings: 1. Fixed raceway surface; 2. Fixed arm; 201. Square pin hole; 202. Round pin hole; 3. Clamping tool; 301. Arc surface of clamping tool groove; 302. Bottom surface of clamping tool groove; 303. Short shaft of clamping tool; 4. Floating raceway surface; 5. Guide column and guide sleeve; 6. Coil spring; 7. Lifting platform; 8. Micrometer; 9. Displacement sensor; 10. Lifting self-locking screw; 11. First servo motor; 12. Second servo motor; 13. Driving rod; 14. Special-shaped wedge; 1401. Upper working arc surface of special-shaped wedge; 1402. Lower working arc surface of special-shaped wedge; 1403. Side surface of special-shaped wedge. DETAILED DESCRIPTION

[0020] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 , 2 As shown, Figure 1 It is a schematic diagram of the main structure of the measuring device of the present invention; Figure 2 It is a side structural schematic diagram of the measuring device of the present invention; a measuring device for the lift of a special-shaped wedge of an overrunning clutch, the measuring device comprising a clamping mechanism, a driving mechanism and a measuring mechanism, the clamping mechanism comprising a fixed raceway surface 1, two front and rear fixed arms 2, two clamping fixtures 3, a floating raceway surface 4, a guide column and guide sleeve 5, a lifting platform 7, a lifting self-locking screw 10 and a first servo motor 11, the floating raceway surface 4 is arranged directly below the fixed raceway surface 1, the clamping fixture 3 is respectively connected between the fixed raceway surface 1 and the floating raceway surface 4 through the front and rear fixed arms 2, the lifting platform 7 is fixed to the lower end of the floating raceway surface 4 through the guide column and guide sleeve 5; the lower end of the lifting platform 7 is provided with a lifting self-locking screw 10 and a first servo motor 11, the first servo motor 11 drives the lifting self-locking screw 10 to drive the lifting platform 7 to lift or lower, so that the floating raceway surface 4 connected thereto cooperates with the fixed raceway surface 1 to complete the clamping and positioning of the wedge in the vertical direction.

[0022] There are four guide posts and guide sleeves 5, and a coil spring 6 is arranged inside each guide post and guide sleeve 5 so that the floating raceway surface 4 is parallel to the lifting platform 7. At the same time, the coil spring 6 is compressed to generate a certain preload force, so that the special-shaped wedge block can always be clamped in the vertical direction, and when the driving mechanism pushes the wedge block to rotate, the floating raceway surface 4 has enough space to move downward.

[0023] The driving mechanism is arranged on one side of the clamping tool 3, and the driving mechanism includes a second servo motor 12 and a driving rod 13 located at the output end of the second servo motor 12. The driving rod 13 can move left and right under the drive of the second servo motor 12, and the driving rod 13 drives the special-shaped wedge block to rotate from the initial state to the long end to the extreme state position.

[0024] The measuring mechanism includes a micrometer 8, a displacement sensor 9 and a data acquisition system. The micrometer 8 and the displacement sensor 9 are both arranged between the floating raceway surface 4 and the lifting platform 7. The micrometer 8 and the displacement sensor 9 measure the descending distance of the floating raceway surface 4 during the rotation of the special-shaped wedge block from the starting state to the long end state. The maximum descending distance of the floating raceway surface 4 is the lift of the special-shaped wedge block.

[0025] The fixed raceway surface 1 and the floating raceway surface 4 are both in contact with the working arc surface of the special-shaped wedge.

[0026] like Figure 3 , 4 As shown, Figure 3 This is a schematic diagram of the main structure of the fixed arm; Figure 4 The sectional structure diagram of the fixed arm AA is shown in FIG. 2 ; a square pin hole 201 is provided at the upper part of the fixed arm 2, and a square pin is provided at the square pin for limiting the fixed raceway surface 1; a circular pin hole 202 is provided at the lower part of the fixed arm 2, and a circular pin is provided at the circular pin for facilitating the rotation of the clamping fixture 3. The distance between the axis of the circular pin hole 202 of the fixed arm 2 and the fixed raceway surface 1 is R, which is consistent with the arc radius of the working arc surface 1401 on the special-shaped wedge block, so that the special-shaped wedge block can always ensure that the working arc surface 1401 on the wedge block is in contact with the fixed raceway surface 1 during the rotation process.

[0027] like Figure 5 , 6 As shown, Figure 5 Schematic diagram of the main structure of the clamping fixture; Figure 6 Schematic diagram of the cross-sectional structure of the clamping fixture; the clamping fixture 3 includes a clamping fixture groove arc surface 301, a clamping fixture groove bottom surface 302, and a clamping fixture short shaft 303, wherein the clamping fixture groove arc surface 301 is perpendicular to the clamping fixture groove bottom surface 302, the arc shape of the clamping fixture groove arc surface 301 matches the shape of the special-shaped wedge, and the clamping fixture short shaft 303 is used in conjunction with the circular pin hole 202 opened at the lower part of the fixed arm 2. The two clamping fixtures 3 are installed symmetrically front and back, and the clamping fixture groove arc surface 301 and the clamping fixture groove bottom surface 302 on the clamping fixture 3 are consistent with the two side surfaces of the special-shaped wedge, and the two cooperate to position the special-shaped wedge in the axial and circumferential directions, thereby clamping the special-shaped wedge.

[0028] like Figure 7 As shown, Figure 7 Schematic diagram of the structure of the shaped wedge of the overrunning clutch. The shaped wedge 14 includes three surfaces: an upper working arc surface 1401 of the shaped wedge, a lower working arc surface 1402 of the shaped wedge, and a side surface 1403 of the shaped wedge.

[0029] A method for measuring the lift of a special-shaped wedge of an overrunning clutch comprises a clamping step A and a measuring step B. The clamping step A comprises the following steps: In the first step, a fixed arm 2 is fixedly connected to the fixed raceway surface 1, a clamping fixture 3 is assembled with the fixed arm 2, and then the special-shaped wedge 14 is installed in the clamping fixture 3; it is necessary to ensure that the side arc surface 1403 of the special-shaped wedge is in contact with the circular arc surface 301 of the clamping fixture groove, the end face of the special-shaped wedge is in contact with the bottom surface 302 of the clamping fixture groove, the working arc surface 1401 on the special-shaped wedge is in contact with the fixed raceway surface 1, and when the clamping fixture 3 drives the special-shaped wedge 14 to rotate smoothly without obvious resistance, the working arc surface 1401 on the special-shaped wedge is not separated from the fixed raceway surface 1; The second step is to assemble the clamping tool 3 and the special-shaped wedge block; it is necessary to ensure that the side arc surface 1403 of the special-shaped wedge block fits with the arc surface 301 of the clamping tool groove, and the end surface of the special-shaped wedge block fits with the bottom surface 302 of the clamping tool groove; The third step is to assemble another fixed arm 2 with the fixed raceway surface 1 and the clamping fixture 3; it is necessary to ensure that the fixed arm 2 is fixedly connected to the fixed raceway surface 1; In the fourth step, the first servo motor 11 drives the lifting self-locking screw 10 to lift the floating raceway surface 4 so as to clamp the special-shaped wedge 14 in the vertical direction, and adjust the special-shaped wedge 14 to the initial position. At this time, the distance between the floating raceway surface 4 and the fixed raceway surface 1 is H, which is the height of the special-shaped wedge 14. It is necessary to ensure that the coil spring 6 in the guide column and guide sleeve 5 is properly compressed, has a certain preload force to clamp the special-shaped wedge 14, and has enough descending space when the driving mechanism pushes the special-shaped wedge 14. Measurement step B includes the following steps: The first step is to bring the micrometer 8 into contact with the floating raceway surface 4 and adjust it to zero, and at the same time connect the displacement sensor 9 to the data acquisition system to measure the displacement of the floating raceway surface 4; In the second step, the second servo motor 12 is turned on to drive the driving rod 13 to move slowly and uniformly to the right, contact the special-shaped wedge block 14 and drive the special-shaped wedge block 14 to rotate a certain angle. The downward displacement of the floating raceway surface 4 collected by the micrometer 8 or the displacement sensor 9 increases continuously. When the downward displacement suddenly decreases, the second servo motor 12 is turned off. The data with the largest downward displacement is the measured value of the lift of the special-shaped wedge block 14. In the third step, the second servo motor 12 drives the driving rod 13 to move to the left, leaving the special-shaped wedge 14 and maintaining an appropriate distance; the first servo motor 11 drives the floating raceway surface 4 to descend, leaving the special-shaped wedge 14 and maintaining an appropriate distance to ensure the operating space for disassembling and re-clamping the new special-shaped wedge 14.

[0030] When it is necessary to measure other special-shaped wedges of the same model, the clamping fixture 3 and the fixed arm 2 assembled therewith are disassembled, the special-shaped wedge 14 that has been measured is taken out, and a new special-shaped wedge is installed, and the subsequent steps continue from the second step of the clamping link A.

[0031] When it is necessary to measure other types of special-shaped wedges, replace the fixed arm 2 and the clamping tool 3 that match the special-shaped wedge 14 of this type, and the subsequent steps can start from the first step of the clamping link A.

[0032] The present invention has the advantages of ingenious design, simple structure and convenient use, and can measure the lift of special-shaped wedges of different models, greatly simplifying the measuring process and achieving accurate measuring results, thereby solving the problems of the lack of existing measuring devices and methods for the lift of special-shaped wedges of overrunning clutches and inaccurate measuring results, and has good market prospects and development space for the existing technology.

[0033] The preferred specific implementation modes and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes and embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the concept of the present invention.

Claims

1. Overrunning clutch special-shaped wedge lift measuring device, characterized by: The measuring device comprises a clamping mechanism, a driving mechanism and a measuring mechanism. The clamping mechanism comprises a fixed raceway surface (1), two front and rear fixed arms (2), two clamping fixtures (3), a floating raceway surface (4), a guide column and a guide sleeve (5), a lifting platform (7), a lifting self-locking screw (10) and a first servo motor (11). The floating raceway surface (4) is arranged directly below the fixed raceway surface (1). The clamping fixture (3) is respectively connected between the fixed raceway surface (1) and the floating raceway surface (4) through the two front and rear fixed arms (2). The lifting platform (7) is fixed to the lower end of the floating raceway surface (4) through the guide column and the guide sleeve (5). The lower end of the lifting platform (7) is provided with a lifting self-locking screw (10) and a first servo motor (11). The first servo motor (11) drives the lifting self-locking screw (10) to drive the lifting platform (7) to lift or lower, so that the floating raceway surface (4) connected thereto cooperates with the fixed raceway surface (1) to complete the clamping and positioning of the wedge block in the vertical direction.

2. The overrunning clutch special-shaped wedge lift measuring device according to claim 1, characterized in that: The upper portion of the fixed arm (2) is provided with a square pin hole (201), the square pin hole (201) being provided with a square pin column for limiting and fixing the raceway surface (1); the lower portion of the fixed arm (2) is provided with a circular pin hole (202), the circular pin hole (202) being provided with a circular pin column for facilitating the rotation of the clamping tool (3).

3. The overrunning clutch special-shaped wedge lift measuring device according to claim 2, characterized in that: The clamping tool (3) comprises a clamping tool groove arc surface (301), a clamping tool groove bottom surface (302), and a clamping tool short shaft (303), wherein the clamping tool groove arc surface (301) is perpendicular to the clamping tool groove bottom surface (302), the arc surface shape of the clamping tool groove arc surface (301) matches the shape of the special-shaped wedge block, and the clamping tool short shaft (303) matches the circular pin hole (202) opened at the lower part of the fixed arm (2) for use.

4. The overrunning clutch special-shaped wedge lift measuring device according to claim 3, characterized in that: The two clamping fixtures (3) are installed symmetrically front and back, and the arc surface (301) of the clamping fixture groove and the bottom surface (302) of the clamping fixture groove on the clamping fixture (3) are consistent with the two side surfaces of the special-shaped wedge block, and the two cooperate to position the special-shaped wedge block in the axial direction and the circumferential direction, thereby clamping the special-shaped wedge block.

5. The overrunning clutch special-shaped wedge lift measuring device according to claim 1, characterized in that: The number of the guide posts and guide sleeves (5) is four, and a coil spring (6) is arranged inside each guide post and guide sleeve (5) so that the floating raceway surface (4) is parallel to the lifting platform (7). At the same time, the coil spring (6) is compressed to generate a certain preload force, so that the special-shaped wedge block can always be clamped in the vertical direction, and when the driving mechanism drives the wedge block to rotate, the floating raceway surface (4) has sufficient space to move downward.

6. The overrunning clutch special-shaped wedge lift measuring device according to claim 1, characterized in that: The driving mechanism is arranged on one side of the clamping fixture (3), and comprises a second servo motor (12) and a driving rod (13) located at an output end of the second servo motor (12). The driving rod (13) can move left and right under the drive of the second servo motor (12), and the driving rod (13) drives the special-shaped wedge block to rotate from an initial state to a long end to an extreme state position.

7. The overrunning clutch special-shaped wedge lift measuring device according to claim 1, characterized in that: The measuring mechanism comprises a micrometer (8), a displacement sensor (9) and a data acquisition system. The micrometer (8) and the displacement sensor (9) are both arranged between the floating raceway surface (4) and the lifting platform (7). The micrometer (8) and the displacement sensor (9) measure the descending distance of the floating raceway surface (4) during the process of the special-shaped wedge block rotating from the initial state to the long end state. The maximum descending distance of the floating raceway surface (4) is the lift of the special-shaped wedge block.

8. The overrunning clutch special-shaped wedge lift measuring device according to claim 1, characterized in that: The fixed raceway surface (1) and the floating raceway surface (4) are both in contact with the working arc surface of the special-shaped wedge block.

9. A method for measuring the lift of a special-shaped wedge of an overrunning clutch, characterized in that: The method includes a clamping step A and a measuring step B. The clamping process A includes the following steps: The first step is to fix a fixed arm (2) to a fixed raceway surface (1), assemble a clamping fixture (3) to the fixed arm (2), and then install the special-shaped wedge into the clamping fixture (3); it is necessary to ensure that the side arc surface of the special-shaped wedge fits with the arc surface (301) of the clamping fixture groove, the end surface of the special-shaped wedge fits with the bottom surface (302) of the clamping fixture groove, the working arc surface on the special-shaped wedge contacts with the fixed raceway surface (1), and when the clamping fixture (3) drives the special-shaped wedge to rotate smoothly without obvious resistance, the working arc surface on the special-shaped wedge and the fixed raceway surface (1) are not separated; The second step is to assemble the clamping tool (3) and the special-shaped wedge block; it is necessary to ensure that the side arc surface of the special-shaped wedge block fits with the arc surface (301) of the clamping tool groove, and the end surface of the special-shaped wedge block fits with the bottom surface (302) of the clamping tool groove; The third step is to assemble another fixed arm (2) with the fixed raceway surface (1) and the clamping fixture (3); it is necessary to ensure that the fixed arm (2) is fixedly connected to the fixed raceway surface (1); In the fourth step, the first servo motor (11) drives the lifting self-locking screw (10) to lift the floating raceway surface (4) so ​​as to clamp the special-shaped wedge in the vertical direction, and adjust the special-shaped wedge to the initial position. At this time, the distance between the floating raceway surface (4) and the fixed raceway surface (1) is H, which is the height of the wedge. It is necessary to ensure that the spiral spring (6) in the guide column and guide sleeve (5) is properly compressed, has a certain preload force to clamp the special-shaped wedge, and has enough space for the drive mechanism to push the special-shaped wedge to fall. Measurement step B includes the following steps: The first step is to bring the micrometer (8) into contact with the floating raceway surface (4) and adjust it to zero, and at the same time connect the displacement sensor (9) to the data acquisition system to measure the displacement of the floating raceway surface (4); In the second step, the second servo motor (12) is turned on to drive the driving rod (13) to move slowly and evenly to the right, contact the special-shaped wedge and drive the special-shaped wedge to rotate a certain angle, and the downward movement of the floating raceway surface (4) collected by the micrometer (8) or the displacement sensor (9) continues to increase. When the downward movement suddenly decreases, the second servo motor (12) is turned off, and the data with the largest downward movement is the measured value of the lift of the special-shaped wedge; In the third step, the second servo motor (12) drives the driving rod (13) to move leftward, leaving the special-shaped wedge and maintaining an appropriate distance; the first servo motor (11) drives the floating raceway surface (4) to descend, leaving the special-shaped wedge and maintaining an appropriate distance, so as to ensure the operating space for disassembling and re-clamping the new special-shaped wedge.

10. The method for measuring the lift of the special-shaped wedge of the overrunning clutch according to claim 9, characterized in that: When it is necessary to measure other special-shaped wedges of the same model, the clamping fixture (3) and the fixed arm (2) assembled therewith are disassembled, the special-shaped wedge that has been measured is taken out, and a new special-shaped wedge is installed, and the subsequent steps are continued from the second step of the clamping link A.

11. The method for measuring the lift of the special-shaped wedge of the overrunning clutch according to claim 9, characterized in that: When it is necessary to measure a special-shaped wedge of another type, the fixed arm (2) and the clamping fixture (3) matching the special-shaped wedge of the type are replaced, and the subsequent steps can be started from the first step of the clamping step A.

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