A multifunctional motor shaft size detection device

Abstract

The invention discloses a multifunctional motor shaft size detection device, which relates to the technical field of motor shaft detection; it comprises a detection platform, and transportation equipment is arranged on both sides of the detection platform; a detection mechanism and a flip mechanism are arranged on the detection platform; the detection mechanism is located above the flip mechanism; the flip structure comprises a flip shaft rotatably mounted on the detection platform, and support mechanisms are slidably arranged at both ends of the flip shaft, and a cleaning piece is arranged on the mounting frame for cleaning various areas on the surface of the motor shaft; the detection mechanism comprises a detection slide seat slidably mounted on the top of the detection platform, and outer rings are slidably arranged on both sides of the detection slide seat, and detection pieces 2 and 3 are arranged on the inner side of the outer ring; the invention can complete multiple detection targets in the detection operation, and has strong practicality compared with a single detection operation.

Description

Technical Field

[0001] The present invention relates to the technical field of motor shaft detection, and in particular to a multifunctional motor shaft size detection device. Background Art

[0002] With the rapid development of the motor field, motors with various functions have been developed. The motor shaft is one of the important components of the motor and is used to transmit torque. Its own size and various form and position tolerances must meet the design requirements, otherwise it will affect the use effect and cause harm to the equipment. For the detection of motor shaft size, tools such as micrometers are generally used. For mass production, this detection method cannot meet the needs. Although some automatic continuous detection equipment is also provided in the prior art, its function is too single and its practicality is not strong. Based on this, the present invention proposes a size detection device that can complete multiple detection targets in the detection operation. Compared with a single detection operation, it is more practical. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention can complete multiple detection targets in a detection operation, which is more practical than a single detection operation.

[0004] The scheme used in the present invention is: a multifunctional motor shaft size detection device, including a detection platform, with transportation equipment arranged on both sides of the detection platform; a detection mechanism and a flip mechanism are arranged on the detection platform; the detection mechanism is located above the flip mechanism; the flip structure includes a flip shaft rotatably mounted on the detection platform, and support mechanisms are slidably arranged at both ends of the flip shaft, and the support mechanism includes a mounting frame, a rotating disk is rotatably mounted on one end of the mounting frame, and a support rod is arranged on the rotating disk, and the end of the motor shaft is supported and fixed by the support rod, and a detection piece 1 is arranged in the center area of ​​the rotating disk for detecting the overall length of the motor shaft; on the mounting frame A cleaning piece is provided on it for cleaning various areas of the motor shaft surface; the detection mechanism includes a detection slide slidably mounted on the top of the detection platform, outer rings are slidably arranged on both sides of the detection slide, and detection pieces 2 and 3 are arranged on the inner sides of the outer rings; detection piece 2 includes a moving frame 1 slidably arranged on the outer ring, and a detector 1 is radially telescopically arranged on the moving frame 1 for detecting the radial size and roundness of each shaft segment of the motor shaft; detection piece 3 includes a moving frame 2 slidably arranged on the outer ring, and a detector 2 is horizontally telescopically arranged on the moving piece 2 for detecting the length size and step flatness of each shaft segment on the motor shaft.

[0005] Preferably, the flip mechanism includes a flip motor fixedly mounted on the inspection platform, the flip motor is used to drive the flip axis; telescopic control electric cylinders are fixedly mounted on both ends of the flip axis, and the telescopic rods of the telescopic control electric cylinders are fixedly connected to the mounting frame.

[0006] Preferably, the support mechanism includes a rotating motor fixedly arranged on the mounting frame, the rotating motor is used to drive the rotating disk; a supporting oil cylinder is fixedly arranged on the rotating disk, the supporting oil cylinder is used to control the movement of the supporting rod; a through hole is opened on the supporting rod; a detection part includes a detection electric cylinder 1 fixedly arranged on the rotating disk, a contact 1 is telescopically arranged on the telescopic rod of the detection electric cylinder 1, and a pressure-sensitive detector 1 is arranged between one end of the contact 1 and the telescopic rod of the detection electric cylinder 1 for outputting feedback detection information.

[0007] Preferably, the cleaning member includes a second motor and a second guide rod fixedly mounted on the mounting frame, and a second screw rod rotatably mounted on the mounting frame. The second motor is used to drive the second screw rod. The second screw rod and the second guide rod are slidably fitted with a cleaning slide, and the cleaning slide and the second screw rod form a spiral pair.

[0008] Preferably, a guide rod 2 is provided on the outer side of the cleaning slide for sliding, and a motor 3 is fixedly provided on the outer side of the cleaning slide, and a screw rod 3 is rotatably provided, and the motor 3 is used to drive the screw rod 3; the movable slide and the screw rod 3 form a spiral pair; a displacement electric cylinder is provided on the movable slide, a jet ring is provided on the telescopic rod of the displacement electric cylinder, and a jet port is provided on the inner side of the jet ring, and an airflow box is provided on the telescopic rod of the displacement electric cylinder, and the airflow box is connected to the jet port on the jet ring to transmit airflow.

[0009] Preferably, the detection mechanism includes a motor 1 and a guide rod 1 fixedly arranged on the top of the detection platform, and a screw rod 1 rotatably arranged on the top of the detection platform, the motor 1 is used to drive the screw rod 1; a detection slide is slidably fitted on the screw rod 1 and the guide rod 1, and the detection slide and the screw rod 1 form a spiral pair; a control electric cylinder 1 is provided on the detection slide, and a control electric cylinder 2 is provided on the telescopic rods at both ends of the control electric cylinder 1, and the telescopic rod of the control electric cylinder 2 is fixedly connected to the outer ring.

[0010] Preferably, a drive control electric cylinder is fixedly provided on the circumference of the outer ring, a slip ring is provided on the telescopic rod of the drive control electric cylinder, a gear ring is rotatably installed on the inner side of the slip ring, and a meshing motor is provided on the drive control electric cylinder, a meshing gear is provided on the output shaft of the meshing motor, and the meshing gear and the gear ring constitute a gear pair; gear one and gear two are rotatably provided on both sides of the gear ring, respectively, for driving detection part one and detection part two.

[0011] Preferably, the movable frame 1 on the detection member 1 includes a connecting seat 1, on which a radial guide rod 1 and a radial screw rod 1 are fixedly provided, the radial guide rod 1 and the radial screw rod 1 are slidingly fitted on the outer ring, and a gear 1 is rotatably mounted on the outer ring, the gear 1 and the radial screw rod 1 form a spiral pair, the gear 1 is engaged with the gear ring to drive the radial screw rod 1; the detector 1 includes a contact 2 slidably provided on the connecting seat 1, and a pressure-sensitive detector 2 is connected between the contact 2 and the connecting seat 1 for outputting feedback detection information.

[0012] Preferably, the movable frame 2 on the detection member 2 includes a connecting seat 2, on which a radial screw 2 and a radial guide rod 2 are fixedly arranged, the radial screw 2 and the radial guide rod 2 are slidingly fitted on the outer ring, and a gear 2 is rotatably installed on the outer ring, the gear 2 and the radial screw 2 form a spiral pair, and the gear 2 is engaged with the gear ring to drive the radial screw 2; the detector 2 includes a contact 3 slidably arranged on the connecting seat 2, and a pressure-sensitive detector 3 is connected between the contact 3 and the connecting seat 2; it is used to output feedback detection information; and a contact contact end is provided on the contact 3, and balls are provided on the end face and circumference of the contact contact end.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: (1) In the present invention, the contact 1 passes through the hole on the support rod and contacts the end of the motor shaft, and the pressure-sensitive detector 1 transmits feedback detection information to detect the overall length of the motor shaft; (2) In the present invention, before flipping, the surface of the motor shaft is cleaned by the cleaning member, the movable slide slides, and the displacement electric cylinder controls the movement of the jet ring so that the jet ring surrounds the motor shaft and sprays through the jet ring to clean its surface; (3) In the present invention, when the radial size and roundness of each shaft segment are detected, the radial position of the contact 2 is adjusted, and the contact The second contact is in contact with the surface of each shaft segment, and feedback detection information is transmitted through the second pressure-sensitive detector; combined with the rotation of the motor shaft, the radial size and roundness of each shaft segment can be detected; (4) In the present invention, when detecting the length and step flatness of each shaft segment, the ball on the circumferential surface of the contact end contacts the surface of the shaft segment, and through axial movement, when the ball on the end surface of the contact end contacts the step plane of the shaft segment, feedback detection information is transmitted through the third pressure-sensitive detector to detect the length of the shaft segment, and then combined with the rotation of the motor shaft, the flatness of the step can be detected. The ball can reduce friction, making the contact area a point contact, and the detection result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the turning mechanism of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the support mechanism of the present invention.

[0017] Figure 4 It is a structural schematic diagram of the cleaning member of the present invention.

[0018] Figure 5 It is a schematic diagram of the installation structure of the detection mechanism of the present invention.

[0019] Figure 6 This is a schematic diagram of the installation structure of the detection component 1 of the present invention.

[0020] Figure 7This is a schematic diagram of the installation structure of the detection component 2 of the present invention.

[0021] Figure 8 Schematic diagram of the structure of the outer ring of the present invention.

[0022] Reference numerals: 1- transport belt; 101- mounting portion; 2- detection table; 3- flip motor; 4- motor 1; 5- screw rod 1; 6- guide rod 1; 7- flip axis; 8- telescopic control cylinder; 9- motor 2; 10- mounting frame; 11- screw rod 2; 12- guide rod 2; 13- clearing slide; 14- rotation motor; 15- rotation disk; 1501- support cylinder; 1502- support rod; 16- detection cylinder 1; 17- contact 1; 18- pressure sensitive detector 1; 19- motor 3; 20- screw rod 3; 21- moving slide; 22- displacement cylinder; 23 -jet ring; 24-air flow box; 25-detection slide; 26-control electric cylinder 1; 27-control electric cylinder 2; 28-outer ring; 29-radial screw 1; 30-radial guide rod 1; 31-gear 1; 32-contact 2; 33-pressure-sensitive detector 2; 34-connecting seat 1; 35-connecting seat 2; 36-radial screw 2; 37-radial guide rod 2; 38-gear 2; 39-contact 3; 3901-contact end; 40-pressure-sensitive detector 3; 41-drive control electric cylinder; 42-slip ring; 43-gear ring; 44-meshing motor; 45-meshing gear. DETAILED DESCRIPTION

[0023] Example: Figures 1 to 8 As shown, transport equipment is provided on both sides of the inspection platform 2. The transport equipment includes a transport belt 1. The transport belt 1 is provided with a mounting portion 101. One of the transport equipment is used for feeding and the other is used for discharging.

[0024] A detection mechanism and a flipping mechanism are provided on the detection table 2; the detection mechanism is located above the flipping mechanism; the flipping structure includes a flipping shaft 7 rotatably mounted on the detection table 2, and support mechanisms are slidably provided at both ends of the flipping shaft 7, and the support mechanism includes a mounting frame 10, and a rotating disk 15 is rotatably mounted on one end of the mounting frame 10, and a support rod 1502 is provided on the rotating disk 15, and the end of the motor shaft is supported and fixed by the support rod 1502, and a detection piece 1 is provided in the center area of ​​the rotating disk 15 for detecting the overall length of the motor shaft; a cleaning piece is provided on the mounting frame 10 for cleaning various areas on the surface of the motor shaft.

[0025] The flipping mechanism includes a flipping motor 3 fixedly arranged on the detection table 2, and the flipping motor 3 is used to drive the flipping shaft 7; telescopic control electric cylinders 8 are fixedly arranged at both ends of the flipping shaft 7, and the telescopic rod of the telescopic control electric cylinder 8 is fixedly connected to the mounting frame 10; the supporting mechanism includes a rotation motor 14 fixedly arranged on the mounting frame 10, and the rotation motor 14 is used to drive the rotating disk 15, and the rotating disk 15 is fixedly provided with a supporting oil cylinder 1501, and the supporting oil cylinder 1501 is used to control the movement of the support rod 1502; a through hole is provided on the support rod 1502; the detection part includes a detection electric cylinder 16 fixedly arranged on the rotating disk 15, and a contact 17 is telescopically provided on the telescopic rod of the detection electric cylinder 16, and a pressure-sensitive detector 18 is provided between one end of the contact 17 and the telescopic rod of the detection electric cylinder 16, for outputting feedback detection information; the cleaning part includes a fixed Motor 29 and guide rod 212 are placed on the mounting frame 10, and screw rod 211 is rotatably mounted on the mounting frame 10. Motor 29 is used to drive screw rod 211. Screw rod 211 and guide rod 212 are slidably matched with a cleaning slide 13, and the cleaning slide 13 and screw rod 211 form a spiral pair; the outer side of the cleaning slide 13 is slidably provided with guide rod 212, and the outer side of the cleaning slide 13 is fixedly provided with motor 319 and screw rod 320 is rotatably provided, and motor 319 is used to drive screw rod 320; the movable slide 21 and screw rod 320 form a spiral pair; a displacement electric cylinder 22 is provided on the movable slide 21, and a jet ring 23 is provided on the telescopic rod of the displacement electric cylinder 22, and an injection port is provided on the inner side of the jet ring 23; an airflow box 24 is provided on the telescopic rod of the displacement electric cylinder 22, and the airflow box 24 is connected with the injection port on the jet ring 23 to transmit airflow.

[0026] The detection mechanism includes a detection slide 25 slidably mounted on the top of the detection platform 2, and outer rings 28 are slidably arranged on both sides of the detection slide 25, and detection parts 2 and 3 are arranged on the inner side of the outer ring 28; the detection part 2 includes a moving frame 1 slidably arranged on the outer ring 28, and a detector 1 is radially telescopically arranged on the moving frame 1 for detecting the radial size and roundness of each shaft segment of the motor shaft; the detection part 3 includes a moving frame 2 slidably arranged on the outer ring 28, and a detector 2 is horizontally telescopically arranged on the moving part 2 for detecting the length size and step flatness of each shaft segment on the motor shaft; the detection mechanism includes a motor 1 4 and a guide rod 1 6 fixedly arranged on the top of the detection platform 2, and a screw rod 1 5 rotatably arranged on the top of the detection platform 2, and the motor 1 4 is used to drive the screw rod 1 5; on the screw rod 1 5, A detection slide 25 is slidably fitted on the guide rod 6, and the detection slide 25 and the lead screw 5 form a spiral pair; a control electric cylinder 1 26 is provided on the detection slide 25, and a control electric cylinder 2 27 is provided on the telescopic rods at both ends of the control electric cylinder 1 26, and the telescopic rods of the control electric cylinder 2 27 are fixedly connected to the outer ring 28; a driving control electric cylinder 41 is fixedly provided on the circumference of the outer ring 28, and a slip ring 42 is provided on the telescopic rod of the driving control electric cylinder 41, and a gear ring 43 is rotatably installed on the inner side of the slip ring 42, and a meshing motor 44 is provided on the driving control electric cylinder 41, and a meshing gear 45 is provided on the output shaft of the meshing motor 44, and the meshing gear 45 and the gear ring 43 form a gear pair; gear 1 31 and gear 2 38 are rotatably provided on both sides of the gear ring 43, respectively, for driving the detection part 1 and the detection part 2.

[0027] The movable frame 1 on the detection member 1 includes a connecting seat 1 34, on which a radial guide rod 1 30 and a radial screw rod 1 29 are fixedly provided. The radial guide rod 1 30 and the radial screw rod 1 29 are slidably fitted on the outer ring 28, and a gear 1 31 is rotatably mounted on the outer ring 28. The gear 1 31 and the radial screw rod 1 29 form a spiral pair, and the gear 1 31 is engaged with the gear ring 43 to drive the radial screw rod 1 29; the detector 1 includes a contact 2 32 slidably arranged on the connecting seat 1 34, and a pressure-sensitive detector 2 33 is connected between the contact 2 32 and the connecting seat 1 34 for outputting feedback detection information; the flip shaft 7 is slidably fitted on the outer ring 28 and is rotatably mounted on the outer ring 28 There is a gear 2 38, which forms a spiral pair with the radial screw 2 36, and the gear 2 38 is engaged with the gear ring 43 to drive the radial screw 2 36; the detector 2 includes a contact 3 39 slidably set on the connecting seat 2 35, and a pressure-sensitive detector 3 40 is connected between the contact 3 39 and the connecting seat 2 35; it is used to output feedback detection information; and a contact contact end 3901 is provided on the contact 3 39, and balls are provided on the end face and circumference of the contact contact end 3901; for the pressure-sensitive detector 1 18, the pressure-sensitive detector 2 33 and the pressure-sensitive detector 3 40, they are all composed of a pressure-sensitive sensor and a spring structure. When the spring mechanism is pressurized, the pressure-sensitive sensor transmits feedback pressure information.

[0028] The working principle is as follows: the motor shaft is transported by transportation equipment. In the flipping area, the position of the supporting structure can be controlled by telescopic control electric cylinder 8, and the support rod 1502 is controlled by supporting oil cylinder 1501 to support and fix the two ends of the motor shaft. First, the movement of contact 17 is controlled by detection electric cylinder 16. Contact 17 passes through the perforation on the support rod 1502 and contacts the end of the motor shaft. The pressure-sensitive detector 18 transmits feedback detection information to detect the overall length of the motor shaft.

[0029] Before flipping, the surface of the motor shaft is cleaned by a cleaning piece. Specifically, motor three 19 works, screw three 20 rotates, and the movable slide 21 slides. The displacement electric cylinder 22 controls the movement of the jet ring 23, so that the jet ring 23 surrounds the motor shaft, and transmits airflow through the airflow box 24 and sprays through the jet ring 23 to clean its surface. Furthermore, the rotating disk 15 is driven to rotate by the self-rotating motor 14, so that the motor shaft can rotate; motor two 9 works, screw two 11 rotates, and the cleaning slide 13 slides to perform a cleaning operation on the entire shaft section.

[0030] By operating the flip motor 3, the flip shaft 7 rotates to drive the motor shaft to flip, so that the motor shaft is located below the detection mechanism. By adjusting the height position of the motor shaft, and then controlling the electric cylinder 1 26 and the electric cylinder 2 27 to operate, the outer ring 28 is located outside the motor shaft and surrounds the motor shaft. The two outer rings 28 form a ring. By operating the motor 1 4, the screw 1 5 rotates, so that the detection slide 25 can slide to perform detection operations on the entire shaft segment. Specifically, when detecting the radial size and roundness of each shaft segment, the electric cylinder 41 is driven to control the movement of the slip ring 42 so that one side of the gear ring 43 engages with the gear 1 31, and the meshing motor 44 operates to move the radial screw 1 29, that is, to adjust the radial position of the contact 2 32. The contact 2 32 contacts the surface of each shaft segment, and the feedback detection information is transmitted through the pressure-sensitive detector 2 33. Combined with the rotation of the motor shaft, the radial size and roundness of each shaft segment can be detected.

[0031] When detecting the length and step flatness of each shaft segment, the other side of the ring gear 43 engages with gear 2 38 to drive radial screw 2 36, thereby adjusting the position of contact 3 39; the ball on the circumferential surface of the contact end 3901 contacts the surface of the shaft segment, and through axial movement, when the ball on the end face of the contact end 3901 contacts the step plane of the shaft segment, the feedback detection information is transmitted through the pressure-sensitive detector 3 40 to detect the length of the shaft segment, and then combined with the rotation of the motor shaft, the flatness of the step can be detected (the ball can reduce friction, make the contact area a point contact, and the detection result is more accurate).

Claims

1. A multifunctional motor shaft dimension detection device, comprising a detection platform (2), wherein transport equipment is arranged on both sides of the detection platform (2); characterized in that: A detection mechanism and a flipping mechanism are provided on the detection table (2); the detection mechanism is located above the flipping mechanism; The flip structure comprises a flip shaft (7) rotatably mounted on a detection table (2); support mechanisms are slidably arranged at both ends of the flip shaft (7); the support mechanisms comprise a mounting frame (10); a self-rotating disc (15) is rotatably mounted on one end of the mounting frame (10); a support rod (1502) is arranged on the self-rotating disc (15); the end of the motor shaft is supported and fixed by the support rod (1502); a detection piece 1 is arranged in the central area of ​​the self-rotating disc (15) for detecting the overall length of the motor shaft; a cleaning piece is arranged on the mounting frame (10) for cleaning various areas on the surface of the motor shaft; the detection mechanism The structure comprises a detection slide (25) slidably mounted on the top of the detection platform (2), outer rings (28) are slidably arranged on both sides of the detection slide (25), and detection components 2 and 3 are arranged on the inner side of the outer ring (28); the detection component 2 comprises a moving frame 1 slidably mounted on the outer ring (28), a detector 1 is radially telescopically arranged on the moving frame 1, and is used to detect the radial size and roundness of each shaft segment of the motor shaft; the detection component 3 comprises a moving frame 2 slidably mounted on the outer ring (28), a detector 2 is horizontally telescopically arranged on the moving frame 2, and is used to detect the length size and step flatness of each shaft segment on the motor shaft; The flip mechanism comprises a flip motor (3) fixedly arranged on the detection platform (2), the flip motor (3) being used to drive a flip shaft (7); telescopic control electric cylinders (8) are fixedly arranged at both ends of the flip shaft (7), and the telescopic rod of the telescopic control electric cylinder (8) is fixedly connected to the mounting frame (10); The support mechanism comprises a self-rotating motor (14) fixedly mounted on the mounting frame (10), the self-rotating motor (14) being used to drive a self-rotating disc (15); a support oil cylinder (1501) being fixedly mounted on the self-rotating disc (15), the support oil cylinder (1501) being used to control the movement of a support rod (1502); a through hole being provided on the support rod (1502); a detection member 1 comprising a detection electric cylinder 1 (16) fixedly mounted on the self-rotating disc (15), a contact 1 (17) being telescopically mounted on a telescopic rod of the detection electric cylinder 1 (16), a pressure-sensitive detector 1 (18) being provided between one end of the contact 1 (17) and the telescopic rod of the detection electric cylinder 1 (16), being used to output feedback detection information; The cleaning member comprises a second motor (9) and a second guide rod (12) fixedly mounted on a mounting frame (10), and a second screw rod (11) rotatably mounted on the mounting frame (10), the second motor (9) being used to drive the second screw rod (11), the second screw rod (11) and the second guide rod (12) being slidably matched with a cleaning slide seat (13), the cleaning slide seat (13) and the second screw rod (11) forming a spiral pair; The outer side of the cleaning slide (13) is slidably provided with a guide rod 2 (12), and the outer side of the cleaning slide (13) is fixedly provided with a motor 3 (19) and a screw rod 3 (20) rotatably provided, and the motor 3 (19) is used to drive the screw rod 3 (20); the movable slide (21) and the screw rod 3 (20) form a spiral pair; a displacement electric cylinder (22) is provided on the movable slide (21), a jet ring (23) is provided on the telescopic rod of the displacement electric cylinder (22), and an injection port is provided on the inner side of the jet ring (23); an airflow box (24) is provided on the telescopic rod of the displacement electric cylinder (22), and the airflow box (24) is connected with the injection port on the jet ring (23) to transmit airflow; The detection mechanism comprises a motor (4) and a guide rod (6) fixedly arranged on the top of the detection platform (2), and a screw rod (5) rotatably arranged on the top of the detection platform (2), wherein the motor (4) is used to drive the screw rod (5); a detection slide (25) is slidably matched on the screw rod (5) and the guide rod (6), and the detection slide (25) and the screw rod (5) form a spiral pair; a control electric cylinder (26) is arranged on the detection slide (25), and a control electric cylinder (27) is arranged on the telescopic rods at both ends of the control electric cylinder (26), and the telescopic rods of the control electric cylinder (27) are fixedly connected to the outer ring (28); A driving control electric cylinder (41) is fixedly arranged on the circumference of the outer ring (28); a slip ring (42) is arranged on the telescopic rod of the driving control electric cylinder (41); a gear ring (43) is rotatably mounted on the inner side of the slip ring (42); a meshing motor (44) is arranged on the driving control electric cylinder (41); a meshing gear (45) is arranged on the output shaft of the meshing motor (44); the meshing gear (45) and the gear ring (43) form a gear pair; gear 1 (31) and gear 2 (38) are rotatably arranged on both sides of the gear ring (43) for driving detection member 1 and detection member 2; The movable frame 1 on the detection member 1 comprises a connecting seat 1 (34), on which a radial guide rod 1 (30) and a radial screw rod 1 (29) are fixedly arranged, the radial guide rod 1 (30) and the radial screw rod 1 (29) are slidably fitted on the outer ring (28), and a gear 1 (31) is rotatably mounted on the outer ring (28), the gear 1 (31) and the radial screw rod 1 (29) form a spiral pair, and the gear 1 (31) is meshed with the gear ring (43) to drive the radial screw rod 1 (29); the detector 1 comprises a contact 2 (32) slidably arranged on the connecting seat 1 (34), and a pressure-sensitive detector 2 (33) is connected between the contact 2 (32) and the connecting seat 1 (34) for outputting feedback detection information; The movable frame 2 on the detection member 2 comprises a connecting seat 2 (35), on which a radial screw rod 2 (36) and a radial guide rod 2 (37) are fixedly arranged, the radial screw rod 2 (36) and the radial guide rod 2 (37) are slidably fitted on the outer ring (28), and a gear 2 (38) is rotatably mounted on the outer ring (28), the gear 2 (38) and the radial screw rod 2 (36) form a spiral pair, and the gear 2 (38) is meshed with the gear ring (43) to drive the radial screw rod 2 (36); the detector 2 comprises a contact 3 (39) slidably arranged on the connecting seat 2 (35), a pressure-sensitive detector 3 (40) is connected between the contact 3 (39) and the connecting seat 2 (35), and is used to output feedback detection information; and a contact contact end (3901) is arranged on the contact 3 (39), and balls are arranged on the end surface and circumference of the contact contact end (3901).

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