Central shaft torque sensor testing equipment

Abstract

The present invention discloses a central shaft torque sensor detection device, comprising: a frame, a panel brake mechanism, a transmission disc, a transmission mechanism, a lifting mechanism, a weight, a crank, and an angle positioning seat. The frame is a hollow structure, a panel is arranged at the top of the frame, a brake disc seat is fixed to the panel, a brake disc is rotatably arranged on the brake disc seat, a sleeve at the first end is detachably connected to the sleeve fixing mechanism and circumferentially fixed to the sleeve fixing mechanism, a connecting shaft is rotatably arranged on the connecting shaft seat, a movable disc and a connecting shaft are circumferentially fixed, the axis of the brake disc, the sleeve fixing mechanism, the central shaft, the transmission disc, and the connecting shaft coincide, an angle positioning block can block the swing of the crank, end B extends into the frame, the distance between the bottom of the weight and the ground is greater than zero, a lifting mechanism is arranged at the bottom of the weight, and the lifting mechanism execution end can extend to lift the weight or retract it to disengage the weight. The present invention has high detection efficiency, high safety, and accurate detection results.

Description

Technical Field

[0001] The present invention relates to a detection device, in particular to a central shaft torque sensor detection device. Background Art

[0002] Currently, when testing torque sensors in bicycle axles or electric bicycle axles, cables are usually used to lift the load for testing. Lifting the load can easily cause safety hazards and cause accidents that lead to personal injury. In addition, the cables for lifting the load are long and prone to shaking during testing, and the stability of the values ​​cannot be guaranteed, requiring repeated testing, resulting in a long testing time. In addition, the current fixture cannot quickly disassemble and assemble the workpiece that needs to be tested, and the efficiency is low. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a central shaft torque sensor detection device, which has the advantages of high detection efficiency, high safety and accurate detection results.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a central shaft torque sensor detection device, including: a frame, a panel, a brake mechanism, a transmission disc, a transmission mechanism, a lifting mechanism, a weight, a crank and an angle positioning seat, the frame is a hollow structure, the panel is arranged on the top of the frame, at least one brake mechanism is fixed on the panel, the brake disc seat is fixed on the panel, the brake disc is rotatably arranged on the brake disc seat, the brake mechanism is provided with a recess for the outer edge of the brake disc to rotate therein, a brake pad is provided on the execution end of the brake mechanism, the brake pad can extend from the side of the recess and contact the brake disc or retract into the recess to disengage from the brake disc under the drive of the execution end of the brake mechanism, the shaft sleeve fixing mechanism is fixed to the center of the brake disc, the central shaft includes a shaft sleeve and a rotating shaft arranged in the shaft sleeve, the two ends of the central shaft are respectively a first end and a second end, the shaft sleeve at the first end is detachably connected to the shaft sleeve fixing mechanism and is circumferentially fixed to the shaft sleeve fixing mechanism, the connecting shaft seat is arranged on the panel, and the connecting shaft rotation device The cam is fixed to the drive shaft by the spring which has the upper end facing the brake disc and the lower end facing the drive shaft, and the cam is fixed to the drive shaft by the spring which has the lower end facing the brake disc.

[0005] Optionally, it also includes a slide rail, which is arranged on the top of the panel, the slide rail is parallel to the axis of the brake disc, the connecting plate is slidably arranged on the slide rail, the brake mechanism and the brake disc seat are fixed on the connecting plate, and also includes a connecting ring, which is arranged between the brake disc and the sleeve fixing mechanism, and a space is provided inside the connecting ring that can accommodate the rotating shaft at the first end of the central axis, and the brake mechanism, brake disc seat, brake disc, sleeve fixing mechanism, connecting ring and central axis can move back and forth along the slide rail under the drive of the slide rail.

[0006] Optionally, the transmission disc is a sprocket, the transmission mechanism is a chain, and the end a of the chain is fixed to the outer edge of the sprocket through a chain fixing block.

[0007] Optionally, the sleeve fixing mechanism is an annular internal spline, and the outer wall of the sleeve located at the first end of the central shaft is provided with an external spline groove capable of engaging with the internal spline.

[0008] Optionally, the lifting mechanism is a cylinder, the cylinder fixing plate is arranged in the frame and parallel to the ground, the cylinder is fixed to one end of the cylinder fixing plate close to the ground, the cylinder fixing plate is provided with a hole for the execution end of the cylinder to pass through, the execution end of the cylinder can extend or retract from the hole, two linear bearings are arranged through the cylinder fixing plate on both sides of the cylinder, a tray is provided at the bottom of the weight, two optical axes are slidably arranged on the two linear bearings, and one end of the two optical axes is fixed to the tray.

[0009] Optionally, a proximity switch is provided on a side of the angle positioning block of the angle positioning seat that contacts the crank, and the crank can contact and trigger the proximity switch during the swinging process.

[0010] Optionally, the braking mechanism is a holding brake, and there are two holding brakes. Two holding brake fixing seats are fixed on the connecting plate at both ends of the brake disc in the radial direction. The two holding brakes are respectively arranged on the two holding brake fixing seats, and the outer edge of the brake disc extends into the brake ports of the two holding brakes.

[0011] Optionally, it also includes a first central axis fixing seat and a second central axis fixing seat, wherein the first central axis fixing seat is arranged on the connecting plate, and the second central axis fixing seat is arranged on the panel, and the first central axis fixing seat and the second central axis fixing seat are provided with an opening for the sleeve of the central axis to pass through, and the openings on the first central axis fixing seat and the second central axis fixing seat coincide with the axis center of the brake disc.

[0012] Optionally, a chain guide is further included, wherein the chain guide is arranged on the panel and the chain passes through the chain guide.

[0013] Optionally, the cross-sections of both ends of the rotating shaft of the central shaft are non-circular, and the rotating shaft connecting end of the connecting shaft is provided with a groove that can engage with the rotating shaft located at the second end of the central shaft. The rotating shaft can be axially inserted into the groove of the rotating shaft connecting end and circumferentially fixed to the rotating shaft connecting end.

[0014] The beneficial technical effect of the present invention is that the central shaft torque sensor detection equipment includes: a frame, a panel, a brake mechanism, a transmission disc, a transmission mechanism, a lifting mechanism, a weight, a crank and an angle positioning seat. The frame is a hollow structure, the panel is arranged on the top of the frame, the brake disc seat is fixed on the panel, the brake disc is rotatably arranged on the brake disc seat, and a brake pad is arranged on the execution end of the brake mechanism. The brake pad can extend from the side of the recess and contact the brake disc or retract into the recess to disengage from the brake disc under the drive of the execution end of the brake mechanism. The central shaft includes a sleeve and a rotating shaft arranged in the sleeve, and the two ends of the central shaft are respectively a first end and a second end. The connecting shaft seat is arranged on the panel, and the connecting shaft is rotatably arranged on the connecting shaft seat. The rotating shaft at the second end is detachably connected to the rotating shaft connecting end and is circumferentially fixed to the rotating shaft connecting end. The transmission disk and the connecting shaft are circumferentially fixed. The axis of the brake disk, the shaft sleeve fixing mechanism, the middle shaft, the transmission disk and the connecting shaft coincide with each other. The crank swing is arranged on the end face of the connecting shaft away from the brake disk. The angle positioning seat is arranged on the panel. The angle positioning seat is provided with an angle positioning block located within the range of the crank swing path. The two ends of the transmission mechanism are end a and end b respectively. The a end of the transmission mechanism is fixed to the outer edge of the transmission disk. The transmission mechanism can be wound around the transmission The disc, end b extends into the frame, the weight is hung at end b, the distance between the bottom of the weight and the ground is greater than zero, the lifting mechanism is set at the bottom of the weight, and the execution end of the lifting mechanism can extend to lift the weight or retract it to separate from the weight. First, the sleeve at the first end of the central shaft is fixed to the sleeve fixing mechanism, and then the rotating shaft at the second end of the central shaft is fixed to the connecting shaft. Since the brake disc is rotated and arranged on the brake disc seat, the connecting shaft is rotated and arranged on the connecting shaft seat. When the brake disc is in a state that is not locked by the brake mechanism, the entire central shaft, brake disc, connecting shaft and transmission disc can rotate freely, and the crank arranged on the connecting shaft can be driven by the rotation of the crank The entire central shaft, brake disc, connecting shaft, and transmission disc are rotated, and the angle positioning block on the angle positioning seat determines the rotation angle to ensure that the central shaft is at the correct detection angle. The brake mechanism then locks the brake disc to limit the rotation of the central shaft sleeve. The actuator end of the lifting mechanism retracts, changing the weight from a jacked-up state to a suspended state. At this time, the pressure of the weight is transmitted from the transmission mechanism to the transmission disc, and then from the transmission disc to the connecting shaft, and finally to the rotating shaft at the second end of the central shaft. Since the pressure of the weight is known, it is only necessary to test whether the value output by the torque sensor in the central shaft is correct to detect whether the central shaft torque sensor is qualified. It has the advantages of high detection efficiency, high safety, and accurate test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the entire machine of the present invention;

[0016] Figure 2 This is a first-perspective stereoscopic view of the entire device of the present invention;

[0017] Figure 3 This is a stereoscopic view of the entire device of the present invention from a second viewing angle;

[0018] Figure 4 This is a top view of the entire machine of the present invention;

[0019] in:

[0020] 1. Frame; 2. Panel; 3. Braking mechanism;

[0021] 4. Transmission plate; 5. Transmission mechanism; 6. Lifting mechanism;

[0022] 7. Weights; 8. Crank; 9. Angle positioning seat;

[0023] 10. Angle positioning block; 11. Brake disc; 12. Brake disc seat;

[0024] 13. Connecting shaft; 14. Connecting shaft seat; 15. Brake fixing seat;

[0025] 16. Slide rail; 17. Connecting plate; 18. Cylinder fixing plate;

[0026] 19. Linear bearing; 20. Optical axis; 21. Tray;

[0027] 22. First center shaft fixing seat; 23. Second center shaft fixing seat; 24. Chain guide;

[0028] 25. Chain fixing block; 26. Connecting ring; 27. Bushing fixing mechanism;

[0029] 28. Fuma ship. DETAILED DESCRIPTION

[0030] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0031] This specific embodiment describes in detail the central shaft torque sensor detection device described in this application, such as Figures 1-4As shown, the central axle torque sensor testing device comprises: a frame 1, a panel 2, a brake mechanism 3, a transmission disc 4, a transmission mechanism 5, a lifting mechanism 6, a weight 7, a crank 8, and an angle positioning seat 9. The frame 1 is a hollow structure. In this embodiment, four Forma wheels are mounted at the bottom of the frame 1, the panel 2 is mounted at the top of the frame 1, and at least one brake mechanism 3 is fixed to the panel 2. A brake disc seat 12 is fixed to the panel 2, and a brake disc 11 is rotatably mounted on the brake disc seat 12. In this embodiment, a bearing is mounted on the brake disc seat 12. The bearing is mounted on the brake disc seat 12 via a bearing retaining ring. The outer ring of the bearing is fixed to the brake disc seat 12, and the inner ring of the bearing is connected to the brake disc 11 via a bearing shaft. The brake mechanism 3 has a recess within which the outer edge of the brake disc 11 rotates. The actuator of the brake mechanism 3 is equipped with a brake pad. Driven by the actuator of the brake mechanism 3, the brake pad can extend from the side of the recess to contact the brake disc 11 or retract into the recess to disengage the brake disc 11. In this embodiment, the static friction force exerted by the brake mechanism 3 on the brake disc 4 is greater than the pressure exerted by the weight 7. That is, when the weight 7 is suspended, the brake mechanism 3 can completely lock the brake disc 4, preventing it from rotating. A sleeve fixing mechanism 27 is fixed to the center of the brake disc 11. The central shaft comprises a sleeve and a rotating shaft disposed within the sleeve, with a first end and a second end. In this embodiment, the central shaft is rod-shaped, with a rotating shaft disposed within the sleeve, which rotates within the sleeve. Both ends of the rotating shaft protrude from the sleeve. A torque sensor is connected to the rotating shaft to detect rotational forces applied to the rotating shaft. The sleeve at the first end is removably connected to the sleeve fixing mechanism 27 and circumferentially fixed thereto. A connecting shaft seat 14 is disposed on the panel 2. The connecting shaft 13 is rotatably mounted on the connecting shaft seat 14. A rotating shaft connection end is disposed on the end surface of the connecting shaft 13 proximal to the brake disc 11. The rotating shaft at the second end is removably connected to the rotating shaft connection end and circumferentially fixed thereto. A transmission disc 4 is provided at one end of the connecting shaft 13 away from the brake disc 11. The transmission disc 4 and the connecting shaft 13 are circumferentially fixed, and the axes of the brake disc 11, the sleeve fixing mechanism 27, the middle shaft, the transmission disc 4 and the connecting shaft 13 coincide. The crank 8 is in the shape of a rod. In this embodiment, the crank 8 twists along its own axis to avoid interference from objects. In some optional embodiments, the crank 8 is a bicycle crank, and the crank 8 is detachably arranged on the connecting shaft 13. The crank 8 is swingably arranged on the end face of the connecting shaft 13 away from the brake disc 11. The angle positioning seat 9 is arranged on the panel 2. The angle positioning seat 9 is provided with an angle positioning block 10 located within the swing path of the crank 8. The angle positioning block 10 can block the swing of the crank 8.The transmission mechanism 5 is in the shape of a strip, and the two ends of the transmission mechanism 5 are end a and end b respectively. End a of the transmission mechanism 5 is fixed to the outer edge of the transmission disc 4, and the transmission mechanism 5 can be wound around the transmission disc 4. End b extends into the frame 1, and the weight 7 is suspended at end b. The distance between the bottom of the weight 7 and the ground is greater than zero. The lifting mechanism 6 is set at the bottom of the weight 7, and the execution end of the lifting mechanism 6 can extend to lift the weight 7 or retract it to separate from the weight 7. First, fix the sleeve at the first end of the central shaft to the sleeve fixing mechanism 27. In this embodiment, it is directly inserted into the sleeve fixing mechanism 27, and then the rotating shaft at the second end of the central shaft is fixed to the connecting shaft 13. In this embodiment, it is directly inserted into the connecting shaft 13. Since the brake disc 11 is rotatably set on the brake disc seat 12, the connecting shaft 13 is rotatably set on the connecting shaft seat 14. When the brake disc 11 is in a state where it is not locked by the brake mechanism 3, the entire central axis, brake disc 11, connecting shaft 13 and transmission disc 4 can rotate freely, and the entire central axis, brake disc 11, connecting shaft 13 and transmission disc 4 can be driven to rotate by rotating the crank 8 arranged on the connecting shaft 13. In this embodiment, the swing end of the crank 8 is located between the panel 2 and the angle positioning block 10, and the angle positioning block 10 on the angle positioning seat 9 is used to position the angle of rotation to ensure that the central axis is at the correct detection angle. In this example, the angle positioning block 10 can limit the angle between the crank 8 and the panel 2 to 90°. In some optional embodiments, the height of the angle positioning seat 9 is adjustable, the angle positioning block 10 is detachable, and the angle between the angle positioning block 10 and the angle positioning seat 9 is adjustable. The brake mechanism 3 then locks the brake disc 11 to limit the rotation of the central axis sleeve. The retraction of the actuator end of lifting mechanism 6 shifts weight 7 from a lifted position to a suspended position. The pressure of weight 7 is now transmitted by transmission mechanism 5 to transmission plate 4, then from transmission plate 4 to connecting shaft 13, and finally to the rotating shaft at the second end of the central shaft. Since the pressure of weight 7 is known, the central shaft torque sensor's compliance can be verified simply by checking the correct output value. This system offers the advantages of high detection efficiency, enhanced safety, and accurate test results.

[0032] Optionally, this embodiment further includes a slide rail 16, which is arranged on the top of the panel 2. The slide rail 16 is parallel to the axis of the brake disc 11, and the connecting plate 17 is slidably arranged on the slide rail 16. The brake mechanism 3 and the brake disc seat 12 are fixed on the connecting plate 17. It also includes a connecting ring 26, which is arranged between the brake disc 11 and the sleeve fixing mechanism 27. The connecting ring 26 is provided with a space that can accommodate the rotating shaft at the first end of the central axis. The brake mechanism 3, the brake disc seat 12, the brake disc 11, the sleeve fixing mechanism 27, the connecting ring 26 and the central axis can move back and forth along the slide rail 16 under the drive of the slide rail 16. The slide rail 16 and the connecting plate 17 can be easily fixed. The central shaft is provided with a slide rail 16, so when installing the central shaft, the brake mechanism 3 and the brake disc seat 12 on the slide rail can be pushed away from the connecting shaft 13 first. At this time, there is enough operating space between the sleeve fixing mechanism 27 and the connecting shaft 13 to fix the central shaft sleeve located at the first end of the central shaft. After the fixation is completed, the connecting plate 17 is pushed. Since the axes of the brake disc 11, the sleeve fixing mechanism 27, the central shaft, the transmission disc 4 and the connecting shaft 13 coincide, the central shaft rotating shaft located at the second end can be inserted into the rotating shaft connecting end of the connecting shaft 13 along its own axial direction to achieve circumferential fixation. The connecting ring 26 is provided to accommodate the part of the central shaft rotating shaft at the first end that protrudes from the sleeve to prevent interference.

[0033] Optionally, in this embodiment, the transmission disc 4 is a sprocket, the transmission mechanism 5 is a chain, and the end a of the chain is fixed to the outer edge of the sprocket through the chain fixing block 25. Using the sprocket and chain as the transmission disc 4 and the transmission mechanism 5 can transmit pressure more efficiently and at a lower cost. The chain fixing block 25 can fix the end a of the chain to the outer edge of the sprocket by screws.

[0034] Optionally, in this embodiment, the sleeve fixing mechanism 27 is an annular internal spline, and the outer wall of the sleeve located at the first end of the central shaft is provided with an external spline groove that can engage with the internal spline. Using the spline to fix the sleeve located at the first end of the central shaft can more conveniently fix the sleeve, and the spline fixation is also more secure.

[0035] In this embodiment, the lifting mechanism 6 is optionally a cylinder, and the cylinder fixing plate 18 is arranged in the frame 1 and parallel to the ground. The cylinder is fixed to the end of the cylinder fixing plate 18 close to the ground. The cylinder fixing plate 18 is provided with a hole for the cylinder's actuator to pass through, and the cylinder's actuator can extend or retract from the hole. Two linear bearings 19 are provided through the cylinder fixing plate 18 on both sides of the cylinder. A tray 21 is provided at the bottom of the weight 7. Two optical axes 20 are slidably provided on the two linear bearings 19, and one end of the two optical axes 20 is fixed to the tray 21. Setting the lifting mechanism 6 as a cylinder can more conveniently control the lifting and retraction actions. In some optional embodiments, the lifting mechanism 6 can also be an electric cylinder or an oil cylinder. The provision of two linear bearings 19 and two optical axes 20 can ensure that the lifting and lowering process is smoother and avoids shaking. The provision of a tray 21 at the bottom of the weight 7 can play a role in uniform force distribution. In some optional embodiments, the weight 7 is detachably disposed on the tray 21 , so that different forces can be measured by replacing the weights 7 with different weights.

[0036] Optionally, in this embodiment, a proximity switch is provided on the side of the angle positioning block 10 of the angle positioning seat 9 that contacts the crank 8. The crank 8 can contact and trigger the proximity switch during the swinging process. The proximity switch is provided so that when the crank 8 enters the correct angle, the execution end of the braking mechanism 3 is activated through a control mechanism electrically connected to the proximity switch to lock the brake disc 11, thereby improving the degree of automation and simplifying the steps for convenient detection.

[0037] In this embodiment, the brake mechanism 3 optionally comprises a holding brake, with two holding brakes being provided. Two holding brake mounts 15 are fixed to the connecting plate 17 at radially opposite ends of the brake disc 11. The two holding brakes are respectively mounted on the two holding brake mounts 15, with the outer edges of the brake disc 11 extending into the brake openings of the two holding brakes. Configuring the brake mechanism 3 as a holding brake facilitates control. In this embodiment, the holding brake is a pneumatic holding brake. In some alternative embodiments, the holding brake may also be an electric holding brake or a hydraulic holding brake. Setting the number of holding brakes to two provides for improved braking effectiveness. In this embodiment, a spacer is provided between the holding brake and the holding brake mounts 15. By adjusting the height of the spacer, the distance between the holding brake and the panel 2 can be adjusted to accommodate brake discs 11 of varying sizes.

[0038] Optionally, this embodiment further includes a first central axis fixing seat 22 and a second central axis fixing seat 23. The first central axis fixing seat 22 is arranged on the connecting plate 17, and the second central axis fixing seat 23 is arranged on the panel 2. The first central axis fixing seat 22 and the second central axis fixing seat 23 are provided with an opening for the central axis sleeve to pass through. The openings on the first central axis fixing seat 22 and the second central axis fixing seat 23 coincide with the axis center of the brake disc 11. The provision of the first central axis fixing seat 22 and the second central axis fixing seat 23 can serve to assist in fixing the central axis sleeve, thereby preventing the central axis from shaking during the detection process, which may cause errors in the detection results.

[0039] Optionally, this embodiment further includes a chain guide 24, which is provided on the panel 2, and the chain passes through the chain guide 24. The chain guide 24 can prevent the chain from shaking during movement, causing unstable operation.

[0040] Optionally in this embodiment, the cross-sections of both ends of the rotating shaft of the central shaft are non-circular, and the rotating shaft connecting end of the connecting shaft 13 is provided with a groove that can engage with the rotating shaft located at the second end of the central shaft. The rotating shaft can be inserted into the groove of the rotating shaft connecting end along the axial direction and be circumferentially fixed to the rotating shaft connecting end. Since the cross-sections of both ends of the rotating shaft of the central shaft are non-circular, and the rotating shaft connecting end of the connecting shaft 13 is provided with a groove that can engage with the rotating shaft located at the second end of the central shaft, the rotating shaft of the central shaft will not rotate in the groove of the connecting shaft 13, which has an effect similar to a keyway fit, thereby achieving the effect of circumferential fixation.

[0041] The use of the central shaft torque sensor detection device in this embodiment has the advantages of high detection efficiency, high safety and accurate detection results.

Claims

1. A central shaft torque sensor detection device, characterized in that: include: The invention relates to a frame (1), a panel (2), a brake mechanism (3), a transmission disc (4), a transmission mechanism (5), a lifting mechanism (6), a weight (7), a crank (8) and an angle positioning seat (9). The frame (1) is a hollow structure. The panel (2) is arranged on the top of the frame (1). At least one brake mechanism (3) is fixed on the panel (2). A brake disc seat (12) is fixed on the panel (2). A brake disc (11) is rotatably arranged on the brake disc seat (12). The brake mechanism (3) is provided with a notch in which the outer edge of the brake disc (11) can rotate. A brake pad is provided on the execution end of the brake mechanism (3). The disc can be extended from the side of the recess and contact the brake disc (11) or retracted into the recess and detached from the brake disc (11) under the drive of the execution end of the brake mechanism (3); the shaft sleeve fixing mechanism (27) is fixed to the center of the brake disc (11); the central shaft includes a shaft sleeve and a rotating shaft arranged in the shaft sleeve; the two ends of the central shaft are respectively a first end and a second end; the shaft sleeve located at the first end is detachably connected to the shaft sleeve fixing mechanism (27) and is circumferentially fixed to the shaft sleeve fixing mechanism (27); the connecting shaft seat (14) is arranged on the panel (2); the connecting shaft (13) is rotatably arranged on the connecting shaft seat (14); the connecting shaft (13) is close to the brake disc (11) The end surface of the connecting shaft (13) is provided with a rotating shaft connecting end, the rotating shaft at the second end is detachably connected to the rotating shaft connecting end and is circumferentially fixed to the rotating shaft connecting end, the end of the connecting shaft (13) away from the brake disc (11) is provided with a transmission disc (4), the transmission disc (4) and the connecting shaft (13) are circumferentially fixed, the axes of the brake disc (11), the shaft sleeve fixing mechanism (27), the middle shaft, the transmission disc (4) and the connecting shaft (13) coincide, the crank (8) is in a rod shape, the crank (8) is swingably provided on the end surface of the connecting shaft (13) away from the brake disc (11), the angle positioning seat (9) is provided on the panel (2), and the angle positioning seat (9) is provided with a (8) An angle positioning block (10) within the swing path range, the angle positioning block (10) can block the swing of the crank (8), the transmission mechanism (5) is strip-shaped, the two ends of the transmission mechanism (5) are end a and end b respectively, the end a of the transmission mechanism (5) is fixed to the outer edge of the transmission disc (4), the transmission mechanism (5) can be wound around the transmission disc (4), the end b extends into the frame (1), the weight (7) is suspended at the end b, the distance between the bottom of the weight (7) and the ground is greater than zero, the lifting mechanism (6) is set at the bottom of the weight (7), and the execution end of the lifting mechanism (6) can extend to lift the weight (7) or retract to separate from the weight (7).

2. The central shaft torque sensor detection device according to claim 1, characterized in that: The invention also includes a slide rail (16), wherein the slide rail (16) is arranged on the top of the panel (2), the slide rail (16) is parallel to the axis of the brake disc (11), the connecting plate (17) is slidably arranged on the slide rail (16), the brake mechanism (3) and the brake disc seat (12) are fixed on the connecting plate (17), and the connecting ring (26) is also included. The connecting ring (26) is arranged between the brake disc (11) and the shaft sleeve fixing mechanism (27), and a space capable of accommodating a rotating shaft located at the first end of the central axis is provided inside the connecting ring (26). The brake mechanism (3), the brake disc seat (12), the brake disc (11), the shaft sleeve fixing mechanism (27), the connecting ring (26) and the central axis can move back and forth along the slide rail (16) under the drive of the slide rail (16).

3. The central shaft torque sensor detection device according to claim 1, characterized in that: The transmission disc (4) is a sprocket, the transmission mechanism (5) is a chain, and the end a of the chain is fixed to the outer edge of the sprocket through a chain fixing block (25).

4. The central shaft torque sensor detection device according to claim 1, characterized in that: The shaft sleeve fixing mechanism (27) is an annular internal spline, and the outer wall of the shaft sleeve located at the first end of the central shaft is provided with an external spline groove capable of engaging with the internal spline.

5. The central shaft torque sensor detection device according to claim 1, characterized in that: The lifting mechanism (6) is a cylinder, a cylinder fixing plate (18) is arranged in the frame (1) and parallel to the ground, the cylinder is fixed to one end of the cylinder fixing plate (18) close to the ground, a hole is provided on the cylinder fixing plate (18) for the cylinder's execution end to pass through, the cylinder's execution end can extend from or retract from the hole, two linear bearings (19) are provided through the cylinder fixing plate (18) and are located on both sides of the cylinder, a tray (21) is provided at the bottom of the weight (7), two optical axes (20) are slidably provided on the two linear bearings (19), and one end of the two optical axes (20) is fixed to the tray (21).

6. The central shaft torque sensor detection device according to claim 1, characterized in that: A proximity switch is provided on the side of the angle positioning block (10) of the angle positioning seat (9) that contacts the crank (8), and the crank (8) can contact and trigger the proximity switch during the swinging process.

7. The central shaft torque sensor detection device according to claim 2, characterized in that: The braking mechanism (3) is a holding brake, and there are two holding brakes. Two holding brake fixing seats (15) are fixed on the connecting plate (17) and are located at the radial ends of the brake disc (11). The two holding brakes are respectively arranged on the two holding brake fixing seats (15), and the outer edges of the brake disc (11) extend into the brake ports of the two holding brakes.

8. The central shaft torque sensor detection device according to claim 2, characterized in that: The invention also includes a first central axis fixing seat (22) and a second central axis fixing seat (23), wherein the first central axis fixing seat (22) is arranged on the connecting plate (17), and the second central axis fixing seat (23) is arranged on the panel (2), and an opening is provided on the first central axis fixing seat (22) and the second central axis fixing seat (23) for the sleeve of the central axis to pass through, and the openings on the first central axis fixing seat (22) and the second central axis fixing seat (23) coincide with the axis center of the brake disc (11).

9. The central shaft torque sensor detection device according to claim 3, characterized in that: It also includes a chain guide (24), which is arranged on the panel (2), and the chain passes through the chain guide (24).

10. The central shaft torque sensor detection device according to claim 2, characterized in that: The cross-sections of the two ends of the rotating shaft of the central shaft are non-circular, and the rotating shaft connecting end of the connecting shaft (13) is provided with a groove capable of engaging with the rotating shaft located at the second end of the central shaft. The rotating shaft can be inserted into the groove of the rotating shaft connecting end along the axial direction and is circumferentially fixed to the rotating shaft connecting end.

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