Electric bicycle motor loading test mechanism

Abstract

The utility model provides an electric bicycle motor loading test mechanism which comprises a loading device and a detection device which are arranged in a matched mode, the loading device comprises a supporting frame, an air cylinder, a loading block and an air pump, and the supporting frame is used for being fixed to a frame of an electric bicycle and supporting a rear wheel of the electric bicycle to be suspended. The loading block is used for applying braking resistance to the rear wheel, the air cylinder controls the braking resistance applied to the rear wheel through stretching and retracting of a piston rod, an air pipe is communicated between the air cylinder and the air pump, an adjusting switch used for controlling the air output of the air pump is arranged on the air pipe, and the detection device is a direct-current electric quantity instrument. The direct-current electric quantity instrument is electrically connected to a power source of a motor of the rear wheel and used for reading voltage data and current data of the power source in real time according to the magnitude of braking resistance acting on the rear wheel. According to the utility model, operation states of the motor of the electric bicycle under different loads can be simulated, and voltage and current data of a motor power supply can be read in real time.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and more specifically, to a load testing mechanism for an electric bicycle motor. Background Technology

[0002] As an indispensable power device in industrial production and daily life, the stability and safety of electric motors are of paramount importance. Overload may occur during the operation of electric motors, leading to motor damage or even accidents. Overload will cause the motor current to increase and the voltage to drop, which in turn will cause adverse effects such as insulation aging, shortened life, increased failure rate and energy waste. Therefore, it is essential to protect electric motors from overload.

[0003] The load on an electric motor depends on the power it bears during operation, which is closely related to the external resistance the motor needs to overcome. External resistance, also known as braking resistance, mainly includes mechanical resistance, wind resistance, and frictional resistance. When the resistance the motor needs to overcome increases, its load will also increase. To ensure the efficiency and lifespan of the motor during normal operation, the operating load of the motor should generally be slightly less than its rated load. Therefore, understanding the load changes of the motor under different external resistance conditions is crucial for designing a reasonable overload protection scheme.

[0004] Electric bicycles, as a convenient means of transportation, have become a common choice for daily travel. Electric bicycles are driven by a motor powered by the vehicle's power supply, which in turn drives the rear wheel to rotate, thus enabling them to move. In order to effectively protect the electric bicycle motor, it is necessary to understand the voltage and current change trends of the motor under overload conditions and take timely measures to prevent motor overload, extend the motor's service life, and ensure riding safety. However, at present, there is a lack of a test device that can effectively simulate the operating state of an electric bicycle motor under different loads, which limits the research and development and application of electric bicycle motor overload protection technology. Utility Model Content

[0005] The purpose of this invention is to overcome the deficiencies in the prior art and provide a test mechanism that can simulate the operating state of an electric bicycle motor under different loads and read the voltage and current data of the motor power supply in real time, so as to realize the testing and evaluation of the overload protection performance of the electric bicycle motor.

[0006] To address the aforementioned problems, this utility model provides an electric bicycle motor loading test mechanism, comprising a loading device and a testing device arranged in cooperation. The loading device includes a support frame, a cylinder fixed on the support frame, a loading block fixed on the piston rod of the cylinder, and an air pump for providing air to the cylinder. The support frame is used to fix the electric bicycle to the frame and support the rear wheel of the electric bicycle in the air. The loading block is used to apply braking resistance to the rear wheel. The cylinder controls the magnitude of the braking resistance applied to the rear wheel through the extension and retraction of the piston rod. An air pipe connects the cylinder and the air pump, and an adjustment switch is provided on the air pipe to control the amount of air output from the air pump. The testing device is a DC power meter. In use, the DC power meter is electrically connected to the power supply of the rear wheel motor and is used to read the voltage and current data of the power supply in real time according to the magnitude of the braking resistance acting on the rear wheel.

[0007] Compared with existing technologies, the advantages of this invention are as follows: This invention changes the braking resistance applied to the rear wheel by extending and retracting the cylinder piston rod, effectively simulating the operating state of an electric bicycle motor under different loads. Furthermore, it uses a DC power meter to read the voltage and current data of the motor power supply in real time, thus providing a reliable basis for testing and evaluating the overload protection performance of the electric bicycle motor. This testing mechanism is simple in structure and easy to operate, facilitating the testing of the overload protection performance of electric bicycle motors. It can effectively promote the research and application of overload protection technology for electric bicycle motors, improve the safety of electric bicycles, and ensure riding safety.

[0008] Specifically, the support frame includes a pair of A-frame uprights arranged side by side, a pair of bolts with inward-threaded screws connected to the upper ends of the pair of A-frame uprights, and a crossbar fixed to the lower ends of the pair of A-frame uprights. A pair of sleeves are correspondingly fixed to the inner ends of the bolts, and these sleeves are used to connect to both ends of the motor shaft of the rear wheel. A cylinder is fixed to the crossbar, with the piston rod of the cylinder pointing towards the center of the line connecting the inner ends of the bolts. This structural design makes the support frame more stable, effectively supporting the rear wheel of the electric bicycle. Furthermore, the more rational orientation of the cylinder piston rod allows for more accurate application of braking force, thereby effectively improving the stability and accuracy of the loading test mechanism and ensuring the reliability of the test results.

[0009] As an improvement, a horizontal extension seat is fixed to the middle of the crossbeam, and an oblique fixing seat is fixed to the top of the horizontal extension seat. The cylinder is obliquely fixed to the oblique fixing seat. This design has two advantages: First, the structure of the horizontal extension seat and the oblique fixing seat enhances the connection strength between the cylinder and the crossbeam, making it more stable and less prone to falling off during the loading test. Second, this design moves the cylinder's position from the crossbeam to the oblique fixing seat, expanding the space between the crossbeam and the electric bicycle's rear wheel, providing more flexible installation space for the cylinder. This allows operators to adjust the cylinder's position and angle according to specific needs. This improvement enhances the stability and flexibility of the loading test mechanism, provides more options for cylinder installation, facilitates test operations, and also strengthens the overall structural strength of the loading test mechanism. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model in use;

[0011] Figure 2 This is a partial structural schematic diagram of the present invention.

[0012] Explanation of reference numerals in the attached figures:

[0013] 1. Loading device; 11. Support frame; 111. A-frame upright; 112. Bolt; 113. Horizontal frame; 114. Sleeve; 12. Cylinder; 13. Loading block; 14. Air pump; 15. Air pipe; 16. Adjusting switch; 2. DC power meter; 3. Horizontal extension seat; 4. Angled fixing seat. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] like Figure 1 and Figure 2As shown, the electric bicycle motor loading test mechanism of this utility model includes a loading device 1 and a detection device. The loading device 1 includes a support frame 11, a cylinder 12 fixed on the support frame 11, a loading block 13 fixed on the piston rod of the cylinder 12, and an air pump 14 for providing air to the cylinder 12. The support frame 11 is used to fix to the frame of the electric bicycle and support the rear wheel of the electric bicycle in the air. The loading block 13 is used to apply braking resistance to the rear wheel. The cylinder 12 controls the magnitude of the braking resistance applied to the rear wheel by extending and retracting the piston rod. An air pipe 15 connects the cylinder 12 and the air pump 14. An adjustment switch 16 is provided on the air pipe 15 to control the amount of air output from the air pump 14. The detection device is a DC power meter 2. In use, the DC power meter 2 is electrically connected to the power supply of the motor of the rear wheel and is used to read the voltage and current data of the power supply in real time according to the magnitude of the braking resistance acting on the rear wheel. The loading block 13 is made of PE plastic, which has good wear resistance.

[0016] This invention utilizes the extension and retraction of the piston rod of cylinder 12 to alter the braking resistance applied to the rear wheel, effectively simulating the operation of an electric bicycle motor under different loads. The DC power meter 2 reads the voltage and current data of the motor power supply in real time, providing a reliable basis for testing and evaluating the overload protection performance of the electric bicycle motor. This testing mechanism is simple in structure and easy to operate, facilitating the testing of the overload protection performance of electric bicycle motors. It can effectively promote the research and application of overload protection technology for electric bicycle motors, improve the safety of electric bicycles, and ensure riding safety.

[0017] like Figure 2 As shown, the support frame 11 includes a pair of herringbone uprights 111 arranged side by side, a pair of bolts 112 with inwardly threaded connections to the upper ends of the pair of herringbone uprights 111, and a crossbar 113 fixed to the lower ends of the pair of herringbone uprights 111. A pair of sleeves 114 are correspondingly fixed to the inner ends of the bolts 112, and the sleeves 114 are used to connect and fix the two ends of the motor shaft of the rear wheel. A cylinder 12 is fixed to the crossbar 113, with the piston rod of the cylinder 12 pointing towards the center of the line connecting the inner ends of the bolts 112. This structural design makes the support frame 11 more stable, effectively supporting the rear wheel of the electric bicycle. Furthermore, the orientation of the piston rod of the cylinder 12 is more reasonable, allowing for more accurate application of braking force. This effectively improves the stability and accuracy of the loading test mechanism, ensuring the reliability of the test results.

[0018] like Figure 2As shown, a horizontal extension seat 3 is fixedly fixed to the middle of the cross frame 113, and an inclined fixing seat 4 is fixed to the top of the horizontal extension seat 3. The cylinder 12 is obliquely fixed to the inclined fixing seat 4. This design has the following two advantages: First, the structure of the horizontal extension seat 3 and the inclined fixing seat 4 enhances the connection strength between the cylinder 12 and the cross frame 113, making it more stable and less prone to falling off during the loading test; Second, this design moves the position of the cylinder 12 from the cross frame 113 to the inclined fixing seat 4, expanding the space between the cross frame 113 and the rear wheel of the electric bicycle, providing more flexible installation space for the cylinder 12, and making it easier for operators to adjust the position and angle of the cylinder 12 according to specific needs. This improvement enhances the stability and flexibility of the loading test mechanism, provides more options for the installation of the cylinder 12, facilitates the test operation, and also enhances the overall structural strength of the loading test mechanism.

[0019] The usage and working principle of this utility model are as follows:

[0020] A. Install the test electric bicycle on the support frame 11, so that the rear wheel of the electric bicycle is suspended in the air, and ensure that the rear wheel motor shaft is fixed on the support frame 11.

[0021] B. Connect the DC power meter 2 to the power supply of the rear wheel motor.

[0022] C. The cylinder 12 is driven by the air pump 14 and the air pipe 15, and the piston rod of the cylinder 12 is controlled to extend and retract by the regulating switch 16, thereby changing the braking resistance applied to the loading block 13.

[0023] D. Use a DC power meter 2 to monitor the voltage and current data of the electric bicycle motor power supply in real time.

[0024] E. By adjusting the extension and retraction of the piston rod of cylinder 12, the operating state of the electric bicycle motor under different loads is simulated, and the performance of the overload protection of the electric bicycle motor is observed.

[0025] This testing device has no site restrictions, is portable, and allows for easy installation and setup of testing platforms. Its simple structure makes it easy to operate. Through reasonable structural design and combination of cylinder 12, loading block 13, and air pump 14, it simulates motor load and tests the overload protection performance of electric bicycle motors by monitoring current and voltage data in real time. This testing mechanism can effectively promote the research and application of overload protection technology for electric bicycle motors, improve the safety of electric bicycles, and ensure riding safety.

[0026] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A loading test mechanism for an electric bicycle motor, characterized in that: The device includes a loading device (1) and a detection device. The loading device (1) includes a support frame (11), a cylinder (12) fixed on the support frame (11), a loading block (13) fixed on the piston rod of the cylinder (12), and an air pump (14) for supplying air to the cylinder (12). The support frame (11) is used to fix the electric bicycle to the frame and support the rear wheel of the electric bicycle in the air. The loading block (13) is used to apply braking resistance to the rear wheel. The cylinder (12) is used to... The piston rod extension and retraction control the magnitude of the braking resistance applied to the rear wheel. An air pipe (15) is connected between the cylinder (12) and the air pump (14). An adjustment switch (16) for controlling the air output of the air pump (14) is provided on the air pipe (15). The detection device is a DC power meter (2). When in use, the DC power meter (2) is electrically connected to the power supply of the motor of the rear wheel and is used to read the voltage and current data of the power supply in real time according to the magnitude of the braking resistance acting on the rear wheel.

2. The electric bicycle motor loading test mechanism according to claim 1, characterized in that: The support frame (11) includes a pair of herringbone uprights (111) arranged side by side, a pair of bolts (112) with the screw threaded inward to the upper end of the pair of herringbone uprights (111), and a crossbeam (113) fixed to the lower end of the pair of herringbone uprights (111). A pair of sleeves (114) are fixed to the inner ends of the pair of bolts (112). The pair of sleeves (114) are used to fit and fix the two ends of the motor shaft of the rear wheel. The cylinder (12) is fixed on the crossbeam (113). The piston rod of the cylinder (12) is oriented toward the center of the line connecting the inner ends of the pair of bolts (112).

3. The electric bicycle motor loading test mechanism according to claim 2, characterized in that: A horizontal extension seat (3) is fixed to the middle of the cross frame (113), and an oblique fixing seat (4) is fixed to the top of the horizontal extension seat (3). The cylinder (12) is obliquely fixed to the oblique fixing seat (4).

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