Bicycle power-assisted intermediate shaft torque calibration machine

Abstract

This utility model relates to the field of testing equipment technology and discloses a bicycle power-assist bottom bracket torque calibration machine, which includes a machine base, a linear motor, a torque sensor, a clamping device, a control device, and a load component. The linear motor is mounted on the machine base, and a movable plate is mounted on the linear motor. The movable plate is respectively equipped with a driving device, a first fixing block, and a second fixing block. The torque sensor is mounted on the movable plate, and a connecting shaft is provided on the movable plate. The torque sensor is located between the output shaft of the driving device and the connecting shaft. This utility model effectively solves the problem that the torque data tested by the existing bicycle power-assist bottom bracket torque calibration machine is not stable and accurate enough. In the existing bicycle power-assist bottom bracket torque calibration machine, the lever arm shaft will jump when rotating, resulting in unstable and inaccurate test data, and also damaging the testing equipment and reducing its service life.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a torque calibration machine for a bicycle power assist bottom bracket. Background Technology

[0002] With increasing environmental awareness and people's pursuit of a healthy lifestyle, bicycles, as a pollution-free and low-carbon mode of transportation, are gaining popularity. Especially for short-distance urban travel, bicycles have become the first choice for many. However, traditional bicycles rely entirely on human power, often leaving riders exhausted on long journeys or uphill sections. To address this issue, electric-assist bicycles were developed. These bicycles use an electric motor to provide auxiliary power, making riding easier and less strenuous. The bottom bracket torque calibrator is a key component of electric-assist bicycles, used to accurately measure and calibrate the torque generated during pedaling, thereby enabling precise control of the motor's output power.

[0003] However, to ensure the accuracy and stability of the power assist system, accurate calibration of the torque of the bicycle's power assist bottom bracket is crucial. The performance of a torque calibration machine, as a testing device, directly affects the accuracy and reliability of the power assist bicycle system.

[0004] The torque data tested by an existing bicycle power-assist bottom bracket torque calibrator is not stable and accurate enough. When the lever arm shaft of the bicycle power-assist bottom bracket torque calibrator rotates, the lever arm shaft will jump, which leads to unstable and inaccurate test data, and will also damage the test equipment and reduce its service life. Utility Model Content

[0005] The purpose of this invention is to solve the problem mentioned in the background art that the torque data tested by the existing bicycle power-assist bottom bracket torque calibration machine is not stable and accurate enough. When the lever arm shaft of the bicycle power-assist bottom bracket torque calibration machine rotates, the lever arm shaft will jump, resulting in unstable and inaccurate test data, and will also damage the test equipment and reduce its service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bicycle power-assist bottom bracket torque calibration machine includes a machine base, a linear motor, a torque sensor, a clamping device, a control device, and a load component. The linear motor is mounted on the machine base and has a movable plate. The movable plate has a drive device, a first fixing block, and a second fixing block. The torque sensor is mounted on the movable plate and has a connecting shaft. The torque sensor is located between the output shaft of the drive device and the connecting shaft. Both output shafts of the torque sensor are connected to the output shaft of the drive device and the connecting shaft of the drive device, respectively, via connecting components. The clamping device is mounted on the machine base and clamps and fixes the tested bicycle power-assist bottom bracket. The control device is mounted on the machine base via the second linear motor and is located away from the drive device. The control device has a second clamp. The load component is mounted on the machine base and connected to the second clamp. The control device can be a servo motor, which can perform zero-point reset of the second clamp position after each test. The control device is connected to the second clamp via a clutch.

[0008] Preferably, the movable plate is provided with a first fixing block and a second fixing block, the torque sensor is provided on the first fixing block, the connecting shaft is rotatably provided on the second fixing block, and a clamp is provided at the end of the connecting shaft away from the torque sensor.

[0009] Preferably, the load component includes a sprocket and a fixed plate. The sprocket is provided with a chain that cooperates with it. The fixed plate is fixed on the machine base. Both ends of the chain are connected to the fixed plate. The load component can apply a load force to the bicycle power steering axle under test.

[0010] Preferably, the fixing plate is provided with two fixing blocks, and the two ends of the chain are respectively located in the two fixing blocks. The fixing blocks are provided with bolts, and the chain ends are fixed to the fixing plate by the bolts. By fixing the chain ends to the fixing plate, the chain wheel will tighten the chain when it rotates, thereby providing a load force to the bicycle's power assist shaft.

[0011] Preferably, the clamping device includes a fixed platform, a telescopic device is provided on the fixed platform, an upper clamping block is provided on the output shaft of the telescopic device, and a lower clamping block corresponding to the upper clamping block is provided on the fixed platform. The fixed platform is located on the machine base. The clamping device can fix the position of the product to be tested. The telescopic device can be a cylinder or other device during use.

[0012] Preferably, the connector includes a first plate, a second plate, and a third plate. The first plate and the third plate are movably connected to the second plate. The first plate is provided with a first connecting end, and the third plate is provided with a second connecting end. The connector can effectively eliminate shaft runout, thereby ensuring that the bicycle power assist shaft can be tested more accurately for torque.

[0013] Preferably, both plate one and plate three are provided with movable grooves, and both left and right sides of plate two are provided with positioning end one and positioning end two, and the positioning end one and positioning end two on the left and right sides of plate two are respectively located in the movable grooves on plate one and plate three.

[0014] Preferably, the movable groove is provided with a pressing block, the pressing block is provided with a through hole, and the pressing block is provided with symmetrical placement ends on both sides. The placement ends are provided with springs, and the springs are located in the movable groove. The springs can absorb and disperse the transmitted vibrations or impacts, further reducing the impact of vibrations on the transmission system.

[0015] Preferably, the movable grooves on plate one and plate two are perpendicular to each other. This design allows the connector to adapt to various complex transmission requirements. Whether it is horizontal or vertical displacement, the connector can be compensated by the corresponding plate, thereby ensuring the smoothness and continuity of transmission.

[0016] Preferably, the connecting positioning end one on the second plate is provided with a connecting hole, and a connecting bolt is provided in the connecting hole. The extrusion block is provided with a through hole, and the connecting bolt passes through the through hole to connect with the corresponding connecting end two. When the spring corresponding to the first plate or the second plate is damaged, the corresponding connecting bolt can be directly removed, so that the corresponding first plate and the second plate can be directly removed, and the corresponding spring can be removed and replaced, which is convenient for users to maintain and replace the spring inside the connecting parts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model uses a clamping device to hold and fix the product in position. The rotation of the clamp is driven by a drive motor, which can simulate the action of a person's right foot on the pedal. The overload component on the machine can apply an overload force to the left end of the bicycle's power-assist shaft, and the torque sensor can test the torque of the product.

[0019] The connector can absorb and disperse the vibration generated by the lever arm system, further reducing the impact of vibration on the transmission system, thereby ensuring that the bicycle power assist bottom bracket can be tested for torque more accurately. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural view of the clamping device of this utility model;

[0023] Figure 3 This utility model shows a view of the torque sensor connected to the driving device and the connecting shaft via connectors.

[0024] Figure 4 This is a structural view of the overload component of this utility model;

[0025] Figure 5 This is a structural view of the connector of this utility model;

[0026] Figure 6 This is an exploded view of the connector of this utility model;

[0027] Figure 7 A view showing the movable groove on the plate body of this utility model;

[0028] Figure 8 This is a view showing the position of the extrusion block of this utility model.

[0029] Drawing number descriptions: 1. Machine base; 11. Linear motor one; 12. Moving plate; 121. Fixed block one; 122. Fixed block two; 2. Drive device; 3. Torque sensor; 4. Connecting parts; 41. Plate one; 411. Connecting end one; 42. Plate two; 421. Positioning end one; 422. Positioning end two; 423. Connecting bolt; 43. Plate three; 431. Extrusion block; 432. Placement end; 4321. Through hole; 433. Spring; 434. Connecting end two; 5. Connecting shaft; 51. Fixture one; 6. Clamping device; 61. Fixed platform; 62. Telescopic device; 63. Upper clamping block; 64. Lower clamping block; 7. Control device; 71. Fixture two; 8. Load component; 81. Sprocket; 82. Chain; 83. Fixed plate. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0034] Please see Figures 1-8 A bicycle power-assist bottom bracket torque calibration machine includes a machine base 1, a linear motor 11, a torque sensor 3, a clamping device 6, a control device 7, and a load component 8. The linear motor 11 is mounted on the machine base 1, and a movable plate 12 is mounted on the linear motor 11. The movable plate 12 is respectively equipped with a drive device 2, a first fixing block 121, and a second fixing block 122. The torque sensor 3 is mounted on the movable plate 12, and a connecting shaft 5 is mounted on the movable plate 12. The torque sensor 3 is located between the output shaft of the drive device 2 and the connecting shaft 5. Both output shafts of the torque sensor 3 are connected by a connecting component. 4 is connected to the output shaft of the drive device 2 and the connecting shaft 5 respectively. The clamping device 6 is set on the machine base 1. The clamping device 6 clamps and fixes the bicycle power assist shaft under test. The control device 7 is set on the machine base 1 through the second linear motor and is located on the side away from the drive device 2. The control device 7 is equipped with the second clamp 71. The load 8 is set on the machine base 1 and connected to the second clamp 71. The control device 7 can be a servo motor when in use. The servo motor can reset the position of the second clamp 71 to zero point after each test. The control device 7 is connected to the second clamp 71 through a clutch.

[0035] Furthermore, the movable plate 12 is provided with a first fixing block 121 and a second fixing block 122. The torque sensor 3 is located on the first fixing block 121, and the connecting shaft 5 is rotatably located on the second fixing block 122. The end of the connecting shaft 5 away from the torque sensor 3 is provided with a clamp 51.

[0036] Furthermore, the load component 8 includes a sprocket 81 and a fixing plate 83. The sprocket 81 is equipped with a chain 82 that cooperates with it. The fixing plate 83 is fixed on the machine base 1. Both ends of the chain 82 are connected to the fixing plate 83. The load component 8 can apply a load force to the tested bicycle power-assist bottom bracket. The fixing plate 83 is equipped with two fixing blocks. Both ends of the chain 82 are respectively located in the two fixing blocks. The fixing blocks are equipped with bolts. The bolts fix the ends of the chain 82 to the fixing plate 83. By fixing the ends of the chain 82 to the fixing plate 83, the sprocket 81 can tighten the chain 82 when it rotates, thereby applying a load force to the bicycle power-assist bottom bracket. The chain 82 is designed to have sufficient length so that it can be easily fitted onto the sprocket 81 by the user.

[0037] The clamping device 6 includes a fixed platform 61, a telescopic device 62 on the fixed platform 61, an upper clamping block 63 on the output shaft of the telescopic device 62, and a lower clamping block 64 on the fixed platform 61 corresponding to the upper clamping block 63. The fixed platform 61 is located on the machine base 1. The clamping device 6 can fix the position of the product to be tested. The telescopic device 62 can be a cylinder or other equipment during use.

[0038] It should be noted that the connecting component 4 includes a first plate 41, a second plate 42, and a third plate 43. Both the first plate 41 and the third plate 43 are movably connected to the second plate 42. The first plate 41 has a connecting end 411, and the third plate 43 has a connecting end 434. The connecting component 4 effectively eliminates shaft runout, thereby ensuring more accurate torque testing of the bicycle's power-assist bottom bracket. Both the first plate 41 and the third plate 43 have movable grooves, and the second plate 42 has positioning ends 42 on both its left and right sides. Positioning end 1 and positioning end 2 422, positioning end 1 421 and positioning end 2 422 on the left and right sides of plate 2 42 are respectively located in the movable grooves on plate 1 41 and plate 3 43. The movable groove is provided with a pressing block 431, and the pressing block 431 is provided with a through hole 4321. The pressing block 431 is symmetrically provided with a placement end 432 on both sides, and the placement end 432 is provided with a spring 433. The spring 433 is located in the movable groove. The spring 433 can absorb and disperse the transmitted vibration or impact, further reducing the impact of vibration on the transmission system.

[0039] It should be added that the movable grooves on plate 1 41 and plate 2 42 are perpendicular to each other. This design allows the connector 4 to adapt to a variety of complex transmission requirements. Whether it is horizontal or vertical displacement, the connector 4 can be compensated by the corresponding plates, thereby ensuring the smoothness and continuity of the transmission.

[0040] The connecting positioning end 421 on plate 2 42 is provided with a connecting hole, and a connecting bolt 423 is provided in the connecting hole. The pressing block 431 is provided with a through hole 4321. The connecting bolt 423 passes through the through hole 4321 and connects to the corresponding connecting end 2 434. When the spring 433 corresponding to plate 1 41 or plate 2 42 is damaged, the corresponding connecting bolt 423 can be directly removed, so that the corresponding plate 1 41 and plate 2 42 can be directly removed, and the corresponding spring 433 can be removed and replaced, which is convenient for users to maintain and replace the spring 433 inside the connector 4.

[0041] In use, before the chain 82 is fitted onto the sprocket 81, the bicycle power-assist bottom bracket to be tested is placed on the lower clamp 64. The telescopic device 62 is activated, and its output shaft pushes the upper clamp 63 downward, allowing it to contact the product on the lower clamp 64 for clamping and fixing. Linear motors 1 and 2 are activated. Linear motor 11 moves the moving plate 12 towards the product, which in turn moves the clamp 51, drive device 2, and torque sensor 3 together, causing one end of the bicycle power-assist bottom bracket to be inserted into clamp 51. Linear motor 2 moves the control device 7 towards the product, causing the other end of the bicycle power-assist bottom bracket to be inserted into clamp 71. The sprocket 81... Corresponding to the position of chain 82, chain 82 is fitted onto sprocket 81. Then, drive device 2 is started. The output shaft of drive device 2 rotates and drives the shaft on torque sensor 3 to rotate through connector 4. The shaft on torque sensor 3 drives connecting shaft 5 to rotate through connector 4. Connecting shaft 5 drives the bicycle power-assist bottom bracket connected to it to rotate through clamp 51 to test the torque. When clamp 51 drives the bicycle power-assist bottom bracket to rotate, it drives sprocket 81 to rotate. The rotating sprocket 81 drives chain 82. Since the end of chain 82 is fixedly connected to fixed plate 83, chain 82 will be tightened, thus giving the bicycle power-assist bottom bracket a load force. The torque of the bicycle power-assist bottom bracket is then tested more accurately through torque sensor 3.

[0042] When the output shaft of the drive device 2 and the shaft on the torque sensor 3 rotate, a certain amount of shaft runout will occur, which will affect the overall detection data. When shaft runout occurs, the first plate 41 and the third plate 43 can move in different directions relative to the second plate 42. The shaft runout can be eliminated by moving. When the first plate 41 and the second plate 42 move, they will compress the spring 433 that cooperates with them. The spring 433 absorbs and disperses the vibration energy generated, further reducing the impact of vibration on the transmission system, thereby ensuring that the bicycle power assist shaft can be tested more accurately.

[0043] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A bicycle power assist bottom bracket torque calibration machine, characterized in that, It includes the machine (1); Linear motor one (11) is mounted on machine base (1). The linear motor one (11) is provided with a movable plate (12). The movable plate (12) is provided with a drive device (2), a fixed block one (121) and a fixed block two (122). A torque sensor (3) is mounted on a movable plate (12), and a connecting shaft (5) is provided on the movable plate (12). The torque sensor (3) is located between the output shaft of the drive device (2) and the connecting shaft (5). The two output shafts of the torque sensor (3) are connected to the output shaft of the drive device (2) and the connecting shaft (5) respectively through connectors (4). A clamping device (6) is provided on the machine base (1) to clamp and fix the test bicycle power-assist bottom bracket; The control device (7) is mounted on the machine base (1) via a linear motor and is located on the side away from the drive device (2). The control device (7) is equipped with a clamp (71). The load element (8) is mounted on the machine base (1) and connected to the second clamp (71).

2. The bicycle power assist bottom bracket torque calibration machine according to claim 1, characterized in that, The movable plate (12) is provided with a first fixed block (121) and a second fixed block (122). The torque sensor (3) is located on the first fixed block (121). The connecting shaft (5) is rotatably located on the second fixed block (122). The end of the connecting shaft (5) away from the torque sensor (3) is provided with a clamp (51).

3. A bicycle power-assist bottom bracket torque calibration machine according to claim 2, characterized in that, The load component (8) includes a sprocket (81) and a fixing plate (83). The sprocket (81) is provided with a chain (82) that cooperates with it. The fixing plate (83) is fixed on the machine base (1). The two ends of the chain (82) are connected to the fixing plate (83).

4. A bicycle power-assist bottom bracket torque calibration machine according to claim 3, characterized in that, The fixing plate (83) is provided with two fixing blocks, and the two ends of the chain (82) are respectively located in the two fixing blocks. The fixing blocks are provided with bolts, and the ends of the chain (82) are fixed to the fixing plate (83) by the bolts.

5. A bicycle power-assist bottom bracket torque calibrator according to claim 4, characterized in that, The clamping device (6) includes a fixed platform (61), a telescopic device (62) is provided on the fixed platform (61), an upper clamping block (63) is provided on the output shaft of the telescopic device (62), and a lower clamping block (64) corresponding to the upper clamping block (63) is provided on the fixed platform (61). The fixed platform (61) is located on the machine base (1).

6. A bicycle power-assist bottom bracket torque calibration machine according to claim 5, characterized in that, The connector (4) includes a first plate (41), a second plate (42) and a third plate (43). The first plate (41) and the third plate (43) are movably connected to the second plate (42). The first plate (41) is provided with a first connecting end (411), and the third plate (43) is provided with a second connecting end (434).

7. A bicycle power-assist bottom bracket torque calibration machine according to claim 6, characterized in that, Both plate one (41) and plate three (43) are provided with movable grooves. Both sides of plate two (42) are provided with positioning end one (421) and positioning end two (422). The positioning end one (421) and positioning end two (422) on the left and right sides of plate two (42) are respectively located in the movable grooves on plate one (41) and plate three (43).

8. A bicycle power-assist bottom bracket torque calibration machine according to claim 7, characterized in that, The movable groove is provided with a pressing block (431), the pressing block (431) is provided with a through hole (4321), the pressing block (431) is provided with symmetrical placement ends (432) on both sides, the placement end (432) is provided with a spring (433), and the spring (433) is located in the movable groove.

9. A bicycle power assist bottom bracket torque calibration machine according to claim 8, characterized in that, The movable groove on plate one (41) and the movable groove on plate two (42) are perpendicular to each other.

10. A bicycle power assist bottom bracket torque calibration machine according to claim 9, characterized in that, The positioning end (421) on the second plate (42) is provided with a connecting hole, and a connecting bolt (423) is provided in the connecting hole. The extrusion block (431) is provided with a through hole (4321), and the connecting bolt (423) passes through the through hole (4321) and connects to the corresponding connecting end (434).

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