Torsion loading device for center shaft of electric vehicle

Abstract

The utility model belongs to the technical field of electric vehicle performance testing, and discloses an electric vehicle center shaft torsion loading device. The electric vehicle center shaft torsion loading device comprises a connecting mechanism, an adjusting mechanism and a driving mechanism, the connecting mechanism is used for being connected with a crank of an electric vehicle, the connecting mechanism is detachably connected with the adjusting mechanism, and the driving mechanism is in transmission connection with the adjusting mechanism. The adjusting mechanism can drive the connecting mechanism to move in the direction close to or away from the crank relative to the driving mechanism. The electric vehicle center shaft torsion loading device is convenient to mount, dismount and maintain.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle performance testing technology, and in particular to a torque loading device for the central axle of an electric vehicle. Background Technology

[0002] The bottom bracket of a bicycle is contained within the crank. When testing the torque of the bottom bracket of an electric bicycle, a pulling force is applied to the crank to measure the torque. However, existing electric bicycle bottom bracket torque testing loading devices are complex in structure, difficult to install and debug, and have low testing efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a torque loading device for the electric vehicle's central axle, which is easy to install, disassemble, and maintain.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A torque loading device for the central shaft of an electric vehicle is provided, comprising a connecting mechanism, an adjusting mechanism, and a driving mechanism. The connecting mechanism is used to connect with the crank of the electric vehicle. The connecting mechanism is detachably connected to the adjusting mechanism. The driving mechanism is driven to the adjusting mechanism. The adjusting mechanism can drive the connecting mechanism to move relative to the driving mechanism in a direction closer to or further away from the crank.

[0006] Preferably, the adjusting mechanism includes a housing, a telescopic rod, and a connecting seat. The housing is detachably connected to the driving mechanism, the telescopic rod passes through the housing, one end of the telescopic rod is drive-connected to the driving mechanism, and the other end of the telescopic rod is detachably connected to the connecting seat. The connecting seat and the connecting mechanism are detachably connected, and the telescopic rod can drive the connecting seat to reciprocate in a direction close to or away from the crank.

[0007] Preferably, the adjustment mechanism further includes an adjustment screw and an adjustment nut, both of which are disposed in the housing. The adjustment screw is arranged along the length direction of the telescopic rod and is drivenly connected to the drive mechanism. The adjustment nut is fixedly connected to the telescopic rod and screwed onto the adjustment screw. The adjustment nut is configured to reciprocate linearly along the length direction of the adjustment screw.

[0008] Preferably, the drive mechanism includes a motor and a transmission box, the transmission box having an input end and an output end, the motor being driven and connected to the input end, the output end being fixedly connected to the adjusting screw, and the housing being fixedly connected to the outer wall of the transmission box.

[0009] Preferably, the adjustment mechanism further includes a guide rod and a guide plate. The guide plate is used to connect with the external frame. Along the length direction of the telescopic rod, the guide plate is fixedly connected to the end of the housing away from the drive mechanism. The guide rod is arranged along the length direction of the telescopic rod, and the guide rod is slidably connected to the guide plate. One end of the guide rod is detachably connected to the connecting seat.

[0010] Preferably, the adjustment mechanism is provided with two guide rods, which are arranged in parallel and spaced apart, and are located on opposite sides of the housing.

[0011] Preferably, the connecting mechanism includes a pull rod and a connector. One end of the pull rod is detachably connected to the adjusting mechanism, and the other end of the pull rod is provided with a connecting hole. The connector is used to pass through the connecting hole and the crank of the electric vehicle in sequence, so that the positions of the pull rod and the crank can be relatively fixed.

[0012] Preferably, the connector is a fixing pin.

[0013] Preferably, the connecting mechanism includes an adapter plate, and one end of the pull rod near the adjusting mechanism is detachably connected to the adjusting mechanism via the adapter plate, and the adapter plate and the adjusting mechanism are detachably connected.

[0014] Preferably, the connecting mechanism further includes a torque test piece, which is used to test the torque applied by the torque loading device of the electric vehicle's central axle. The torque test piece is detachably disposed between the tie rod and the adapter plate.

[0015] The beneficial effects of this utility model are as follows: It provides an electric vehicle axle torque loading device, which is detachably connected to the adjustment mechanism through a connecting mechanism, and the drive mechanism is transmitted to the adjustment mechanism to realize a modular setting, making the electric vehicle axle torque loading device easy to install, disassemble and maintain, and improving the testing efficiency of electric vehicle axle torque testing.

[0016] Meanwhile, the adjustment mechanism can drive the connecting mechanism to move relative to the drive mechanism in a direction closer to or further away from the crank, thereby allowing the electric vehicle's central shaft torque loading device to adjust the position of the connecting mechanism according to the size of the electric vehicle, resulting in high versatility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the electric vehicle central shaft torque loading device provided by this utility model.

[0018] In the diagram: 1. Connecting mechanism; 11. Tie rod; 111. Connecting hole; 12. Adapter plate; 13. Torque test piece;

[0019] 2. Adjustment mechanism; 21. Housing; 22. Telescopic rod; 23. Connecting seat; 24. Guide rod; 25. Guide plate;

[0020] 3. Drive mechanism; 31. Motor; 32. Transmission box. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] Please refer to Figure 1This embodiment provides a torque loading device for the bottom axle of an electric vehicle, including a connecting mechanism 1, an adjusting mechanism 2, and a driving mechanism 3. The connecting mechanism 1 is used to connect to the crank of the electric vehicle. The connecting mechanism 1 is detachably connected to the adjusting mechanism 2. The driving mechanism 3 is driven by the adjusting mechanism 2. The adjusting mechanism 2 can drive the connecting mechanism 1 to move relative to the driving mechanism 3 in a direction closer to or further away from the crank. This configuration, with the connecting mechanism 1 and the adjusting mechanism 2 detachably connected and the driving mechanism 3 driven by the adjusting mechanism 2, achieves a modular design, making the torque loading device for the bottom axle of the electric vehicle easy to install, disassemble, and maintain, thus improving the testing efficiency of the torque test for the bottom axle of the electric vehicle.

[0026] Meanwhile, the adjustment mechanism 2 can drive the connecting mechanism 1 to move relative to the drive mechanism 3 in a direction closer to or further away from the crank, thereby allowing the electric vehicle's central shaft torque loading device to adjust the position of the connecting mechanism 1 according to the size of the electric vehicle, resulting in high versatility.

[0027] Optionally, the adjusting mechanism 2 includes a housing 21, a telescopic rod 22, and a connecting seat 23. The housing 21 is detachably connected to the drive mechanism 3. The telescopic rod 22 passes through the housing 21. One end of the telescopic rod 22 is drively connected to the drive mechanism 3, and the other end is detachably connected to the connecting seat 23. The connecting seat 23 is detachably connected to the connecting mechanism 1. The telescopic rod 22 can drive the connecting seat 23 to reciprocate in a direction closer to or further away from the crank. With this configuration, when the telescopic rod 22 drives the connecting seat 23 to move closer to the crank, the relative position of the connecting mechanism 1 and the crank can be adjusted, making the connecting hole 111 of the pull rod 11 coaxial with the mounting hole of the crank, facilitating the connection of the electric vehicle's central shaft torque loading device to the crank. After the electric vehicle's central shaft torque loading device is connected to the crank, the telescopic rod 22 drives the connecting seat 23 to move away from the crank, providing torque to the crank. It should be understood that the stroke of the telescopic rod 22 moving away from the crank is proportional to the torque provided by the electric vehicle's central shaft torque loading device.

[0028] Specifically, the adjusting mechanism 2 also includes an adjusting screw and an adjusting nut, both housed within the housing 21. The adjusting screw is positioned along the length of the telescopic rod 22 and is driven by the drive mechanism 3. The adjusting nut is fixedly connected to the telescopic rod 22 and screwed onto the adjusting screw, configured to reciprocate linearly along the length of the adjusting screw. This configuration converts rotational motion into linear motion through the threaded engagement of the adjusting screw and nut, improving the device's adjusting accuracy, flexibility, and stability. Furthermore, the simple structure of the adjusting screw and nut facilitates the installation and maintenance of the device.

[0029] Optionally, the drive mechanism 3 includes a motor 31 and a transmission box 32. The transmission box 32 has an input end and an output end. The motor 31 is driven and connected to the input end, and the output end is fixedly connected to an adjusting screw. The housing 21 is fixedly connected to the outer wall of the transmission box 32. Specifically, the transmission box 32 is a gear reducer. This configuration allows the speed of the motor 31 to be reduced and the torque increased to meet load requirements. In other embodiments, the drive mechanism 3 can also be a pneumatic system or a hydraulic system; this embodiment does not specifically limit this.

[0030] Optionally, the adjustment mechanism 2 further includes a guide rod 24 and a guide plate 25. The guide plate 25 is used to connect to the external frame. Along the length direction of the telescopic rod 22, the guide plate 25 is fixedly connected to the end of the housing 21 away from the drive mechanism 3. The guide rod 24 is arranged along the length direction of the telescopic rod 22, and the guide rod 24 is slidably connected to the guide plate 25. One end of the guide rod 24 is detachably connected to the connecting seat 23. By setting the guide rod 24 and the guide plate 25, it is ensured that the telescopic rod 22 moves in a direction close to or away from the crank, thus ensuring the motion accuracy of the electric vehicle's central shaft torque loading device.

[0031] Optionally, the adjustment mechanism 2 is provided with two guide rods 24, which are arranged in parallel and spaced apart, and are located on opposite sides of the housing 21. By providing guide rods 24 on opposite sides of the housing 21, the telescopic rod 22 is prevented from deflecting and rotating during movement, thereby improving the accuracy of linear motion and enhancing the motion accuracy and stability of the electric vehicle's central shaft torque loading device.

[0032] Optionally, the connecting mechanism 1 includes a pull rod 11 and a connector. One end of the pull rod 11 is detachably connected to the adjusting mechanism 2, and the other end of the pull rod 11 is provided with a connecting hole 111. The connector is used to pass through the connecting hole 111 and the crank of the electric vehicle in sequence, so that the positions of the pull rod 11 and the crank can be relatively fixed. With this configuration, the connector and the connecting hole 111 cooperate to ensure that the relative position between the pull rod 11 and the crank is fixed, avoiding loosening or displacement during operation, and improving the reliability and stability of the device.

[0033] Preferably, the connecting element is a retaining pin. This makes the connection process between the pull rod 11 and the crank simple and quick, improving the assembly efficiency of the device. The connecting element can also be a bolt, hook, etc.

[0034] Optionally, the connecting mechanism 1 includes an adapter plate 12. One end of the pull rod 11 near the adjusting mechanism 2 is detachably connected to the adjusting mechanism 2 via the adapter plate 12. Specifically, the adapter plate 12 and the connecting seat 23 are bolted together. This configuration simplifies the connection between the pull rod 11 and the adjusting mechanism 2, facilitating assembly and maintenance of the device. It also facilitates the upgrading and expansion of the electric vehicle's central axle torque loading device, improving the device's flexibility.

[0035] For example, the connecting mechanism 1 also includes a torque test piece 13, which is used to test the torque applied by the torque loading device on the electric vehicle's central axle. The torque test piece 13 is detachably disposed between the tie rod 11 and the adapter plate 12. Specifically, the torque test piece 13 can be a torque sensor. By setting a torque sensor, the torque applied to the crankshaft by the electric vehicle's central axle torque loading device can be measured, thus facilitating the operator to adjust the applied torque to a preset value.

[0036] The principle of using this electric vehicle axle torque loading device for testing the torque of the electric vehicle's axle is as follows:

[0037] First, adjust the extension length of the telescopic rod 22 according to the size of the electric vehicle to be tested, so that the connecting hole 111 of the pull rod 11 and the mounting hole of the crank are coaxial. Insert a fixing pin into the connecting hole 111 to connect the pull rod 11 and the crank through the fixing pin. At this time, the crank is kept in a horizontal position. Next, fix the rear wheel of the electric vehicle and adjust the pull rod 11 to move away from the crank, so that the torque loading device of the electric vehicle's central axle applies a downward pulling force to the crank. During the process of the pull rod 11 moving away from the crank, the torque data loaded by the device can be obtained through the torque sensor. By obtaining the data in real time, the accuracy and stability of the test results can be ensured.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A shaft torque loading device in an electric vehicle, characterized by, It includes a connecting mechanism (1), an adjusting mechanism (2), and a driving mechanism (3). The connecting mechanism (1) is used to connect with the crank of the electric vehicle. The connecting mechanism (1) is detachably connected to the adjusting mechanism (2). The driving mechanism (3) is driven to the adjusting mechanism (2). The adjusting mechanism (2) can drive the connecting mechanism (1) to move relative to the driving mechanism (3) in a direction closer to or away from the crank.

2. The electric vehicle axle torque loading device of claim 1, wherein, The adjustment mechanism (2) includes a housing (21), a telescopic rod (22), and a connecting seat (23). The housing (21) is detachably connected to the drive mechanism (3). The telescopic rod (22) passes through the housing (21). One end of the telescopic rod (22) is connected to the drive mechanism (3), and the other end of the telescopic rod (22) is detachably connected to the connecting seat (23). The connecting seat (23) and the connecting mechanism (1) are detachably connected. The telescopic rod (22) can drive the connecting seat (23) to reciprocate in the direction of approaching or moving away from the crank.

3. The electric vehicle inboard shaft torque loading device of claim 2, wherein, The adjustment mechanism (2) further includes an adjustment screw and an adjustment nut. The adjustment screw and the adjustment nut are both disposed in the housing (21). The adjustment screw is disposed along the length direction of the telescopic rod (22). The adjustment screw is drivenly connected to the drive mechanism (3). The adjustment nut is fixedly connected to the telescopic rod (22). The adjustment nut is screwed to the adjustment screw and is configured to reciprocate linearly along the length direction of the adjustment screw.

4. The electric vehicle axle torque loading device of claim 3, wherein, The drive mechanism (3) includes a motor (31) and a transmission box (32). The transmission box (32) has an input end and an output end. The motor (31) is driven to the input end, and the output end is fixedly connected to the adjusting screw. The housing (21) is fixedly connected to the outer wall of the transmission box (32).

5. The electric vehicle inboard shaft torque loading device of claim 2, wherein, The adjustment mechanism (2) further includes a guide rod (24) and a guide plate (25). The guide plate (25) is used to connect with an external frame. Along the length direction of the telescopic rod (22), the guide plate (25) is fixedly connected to the end of the housing (21) away from the drive mechanism (3). The guide rod (24) is arranged along the length direction of the telescopic rod (22). The guide rod (24) is slidably connected to the guide plate (25), and one end of the guide rod (24) is detachably connected to the connecting seat (23).

6. The electric vehicle inboard shaft torque loading device of claim 5, wherein, The adjustment mechanism (2) is provided with two guide rods (24), which are arranged in parallel and spaced apart, and are located on opposite sides of the housing (21).

7. The electric vehicle intermediate shaft torque loading device of any of claims 1-6, wherein, The connecting mechanism (1) includes a pull rod (11) and a connector. One end of the pull rod (11) is detachably connected to the adjusting mechanism (2), and the other end of the pull rod (11) is provided with a connecting hole (111). The connector is used to pass through the connecting hole (111) and the crank of the electric vehicle in sequence, so that the position of the pull rod (11) and the crank can be relatively fixed.

8. The electric vehicle inboard shaft torque loading device of claim 7, wherein, The connector is a fixing pin.

9. The electric vehicle inboard shaft torque loading device of claim 7, wherein, The connecting mechanism (1) includes an adapter plate (12), and one end of the pull rod (11) near the adjusting mechanism (2) is detachably connected to the adjusting mechanism (2) through the adapter plate (12). The adapter plate (12) and the adjusting mechanism (2) are detachably connected.

10. The electric vehicle inboard shaft torque loading device of claim 9, wherein, The connecting mechanism (1) further includes a torque test piece (13), which is used to test the torque applied by the torque loading device of the electric vehicle's central axle. The torque test piece (13) is detachably disposed between the pull rod (11) and the adapter plate (12).

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