An electrically assisted bicycle whole vehicle test platform

Abstract

The patent discloses a kind of electrically assisted bicycle whole vehicle test platform, comprising: platform base, test rack, transmission assembly, resistance simulation device and load simulation device;Test rack is set on platform base, and test rack includes motor;Transmission assembly is connected with the output shaft of motor at one end, and the other end is provided with the connecting part for connecting the measured electrically assisted bicycle axle;Resistance simulation device is connected with the rear wheel of measured electrically assisted bicycle;Load simulation device includes load support frame and load object arranged on load support frame, and the bottom of load support frame is provided with load connection structure for fixing at the saddle of measured electrically assisted bicycle.The patent can reproduce real riding state, and realize the whole vehicle performance test of electrically assisted bicycle.

Description

Technical Field

[0001] This patent relates to a whole-vehicle testing platform for electric-assisted bicycles, belonging to the field of electric-assisted bicycle technology. Background Technology

[0002] As a green and convenient mode of transportation, electric-assisted bicycles have seen increasing demand in both domestic and international markets in recent years. Especially in overseas regions, influenced by regulations and riding habits, electric-assisted bicycles have become one of the mainstream modes of transportation. With the expansion of the market, performance, reliability, and safety testing of electric-assisted bicycles has become particularly important.

[0003] Currently, there are many gaps in testing methods for e-bikes. Existing technologies mostly focus on testing individual components such as motor performance and frame structure, lacking integrated testing of the entire vehicle system. Whole-vehicle testing often relies on manual operation, such as simulating riding conditions by pedaling. This method is not only inefficient but also difficult to precisely control test conditions, resulting in poor repeatability and consistency of test results. Furthermore, manual testing cannot simulate extreme conditions such as continuous high loads and complex road conditions, failing to comprehensively evaluate the performance of e-bikes in real-world usage environments.

[0004] Therefore, there is an urgent need in this field for a whole-vehicle testing platform for electric-assisted bicycles that can simulate real riding conditions. Summary of the Invention

[0005] The purpose of this patent is to overcome the shortcomings of existing technologies and provide a complete testing platform for electric-assisted bicycles, capable of replicating real-world riding conditions and enabling comprehensive performance testing of electric-assisted bicycles. To achieve the above objective, this patent employs the following technical solution:

[0006] This patent provides a complete test platform for electric-assisted bicycles, including: a platform base, a test bench, a transmission assembly, a resistance simulation device, and a load simulation device;

[0007] The test bench is mounted on the platform base, and the test bench includes a motor;

[0008] One end of the transmission assembly is connected to the output shaft of the motor, and the other end is provided with a connecting part for connecting to the bottom bracket of the electric-assist bicycle under test.

[0009] The resistance simulation device is connected to the rear wheel of the electric-assisted bicycle under test.

[0010] The load simulation device includes a load support frame and a load mounted on the load support frame. The bottom of the load support frame is provided with a load connection structure for fixing to the saddle of the electric-assisted bicycle under test.

[0011] Optionally, the test bench further includes a reducer connected to the output shaft of the motor, and the transmission assembly connected to the output end of the reducer.

[0012] Optionally, the transmission component is a universal joint or linkage mechanism, used to mechanically and adaptively adjust the height difference and horizontal distance between the bottom bracket of the electric-assisted bicycle under test and the test bench.

[0013] Optionally, the resistance simulation device includes an electromagnetic drive device or a mechanical load device. The electromagnetic drive device is connected to the rear wheel of the electric-assisted bicycle under test through frictional coupling, and the mechanical load device is fixedly connected to the flywheel of the rear wheel of the electric-assisted bicycle under test through mechanical connection.

[0014] Optionally, when the resistance simulation device uses an electromagnetic drive device, the electric-assisted bicycle test platform is equipped with a heat dissipation device for cooling the electromagnetic drive device and the rear wheel of the electric-assisted bicycle under test.

[0015] Optionally, the electric-assisted bicycle testing platform also includes a wind resistance simulation device located in front of the electric-assisted bicycle under test.

[0016] Optionally, the electric-assist bicycle test platform also includes a power supply for powering the electric-assist bicycle test platform.

[0017] Optionally, the electric-assisted bicycle test platform further includes an input controller, a motor controller, and a resistance controller;

[0018] The signal input terminal of the motor controller is connected to the signal output terminal of the input controller, and the signal output terminal of the motor controller is connected to the motor.

[0019] The signal input terminal of the resistance controller is connected to the signal output terminal of the input controller, and the signal output terminal of the resistance controller is connected to the resistance simulation device.

[0020] Optionally, the electric-assisted bicycle test platform further includes a sensor located between the output shaft of the motor and the transmission assembly. The sensor is connected to the signal input terminal of the input controller and is used to collect the torque and / or speed output by the motor.

[0021] Optionally, the input controller can be any one of a programmable logic controller, a computer, or a microcontroller.

[0022] Compared with the prior art, the beneficial effects achieved by the electric-assisted bicycle whole vehicle testing platform provided in this patent embodiment include:

[0023] This patented test bench is mounted on a platform base and includes a motor. One end of the transmission component is connected to the output shaft of the motor, and the other end is provided with a connecting part for connecting to the bottom bracket of the electric-assist bicycle under test. This patent can simulate human pedaling through the motor and transmission component. The resistance simulation device of this patent is connected to the rear wheel of the electric-assist bicycle under test, and this patent can dynamically apply load. This patent can accurately and repeatably simulate real riding conditions, overcoming the problems of poor repeatability, low consistency, and difficulty in reproducing extreme conditions in traditional manual testing.

[0024] This patented load simulation device includes a load support frame and a load mounted on the load support frame. The bottom of the load support frame is provided with a load connection structure for fixing to the saddle of the electric-assisted bicycle under test. This patent applies weight to the saddle through the load simulation device, which can simulate the real load of the rider and the goods.

[0025] The transmission component of this patent is a universal joint or linkage mechanism, which is used to mechanically and adaptively adjust the height difference and horizontal distance between the bottom bracket of the tested electric-assist bicycle and the test bench. This patent can adaptively adjust the positional deviation between the bottom bracket of the tested electric-assist bicycle and the test bench, making it convenient and quick to install electric-assist bicycles of different sizes and models, thus enhancing the applicability of the test platform.

[0026] This patent can reproduce the real riding state and realize the overall performance test of electric-assisted bicycles. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a test platform for an electric-assisted bicycle provided in Embodiment 1 of this patent.

[0028] In the picture:

[0029] 1. Platform base; 2. Test bench; 3. Motor; 4. Reducer; 5. Transmission assembly; 6. Resistance simulation device; 7. Load support frame; 8. Load; 9. Heat dissipation device; 10. Electric bicycle under test; 11. Sensor. Detailed Implementation

[0030] The technical solutions of this patent embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0031] In the description of this patent, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this patent and for simplifying the description, 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 patent. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "set / set up," "sleeve," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0033] In this embodiment, the following is provided: Figure 1 The electric-assisted bicycle test platform shown includes: a platform base 1, a test stand 2, a transmission assembly 5, a resistance simulation device 6, and a load simulation device.

[0034] like Figure 1 As shown, the test stand 2 is mounted on the platform base 1.

[0035] The platform base 1 is a rigid structure, preferably a cast iron platform, used to provide a stable foundation for the test bench 2. The test bench 2 is fixed to several dovetail grooves provided on the platform base 1 by bolts. This connection method facilitates the adjustment of the front and rear position of the test bench 2 on the platform base 11 to accommodate bicycles with different wheelbases.

[0036] like Figure 1 As shown, the test bench 2 includes a motor 3 and a reducer 4. The input end of the reducer 4 is connected to the output shaft of the motor 3, and the reducer 4 is used to adjust the output torque of the motor 3. The test bench 2 also includes a motor 3 controller (…). Figure 1 (Not shown), the motor 3 controller is used to receive control signals and precisely drive motor 3.

[0037] One end of the transmission assembly 5 is connected to the output shaft of the motor 3, and the other end is provided with a connecting part for connecting to the bottom bracket of the electric-assist bicycle 10 under test. Figure 1 As shown, in this embodiment, the test bench 2 is equipped with a reducer 4, and one end of the transmission component 5 is connected to the output end of the reducer 4.

[0038] This embodiment can simulate human footsteps through the motor 3 and transmission component 5.

[0039] The transmission assembly 5 is a universal joint or linkage mechanism, used to mechanically and adaptively adjust the height difference and horizontal distance between the bottom bracket of the tested electric-assist bicycle 10 and the test bench 2. For example... Figure 1 As shown, this embodiment uses a universal joint to achieve flexible power transmission.

[0040] In this embodiment, the transmission component 5 can adaptively adjust the positional deviation between the bottom bracket of the electric-assist bicycle 10 under test and the test stand 2, which facilitates the quick installation of electric-assist bicycles of different sizes and models, and enhances the applicability of the test platform.

[0041] The resistance simulation device 6 is connected to the rear wheel of the electric-assist bicycle 10 under test. The resistance simulation device 6 includes an electromagnetic drive device or a mechanical load device. The electromagnetic drive device is connected to the rear wheel of the electric-assist bicycle 10 under test through frictional coupling, and the mechanical load device is fixedly connected to the flywheel of the rear wheel of the electric-assist bicycle 10 under test through mechanical connection.

[0042] In this embodiment, the resistance simulation device 6 is an electromagnetic drive device that applies resistance through friction coupling by contacting the rear wheel tire of the electric-assist bicycle 10 under test via a friction wheel. The resistance simulation device 6 is connected to a resistance controller ( Figure 1 (Not shown), used to dynamically adjust the resistance level to simulate different road conditions.

[0043] Electromagnetic drive devices include, but are not limited to, electromagnetic drive motors, eddy currents, electro-controlled fluids, and electro-controlled flywheels.

[0044] In this embodiment, the resistance simulation device 6 is connected to the rear wheel of the electric-assisted bicycle 10 under test, and can dynamically apply load.

[0045] When the resistance simulation device 6 uses an electromagnetic drive device, in order to cope with the heat generated during high load testing, the electric-assisted bicycle test platform is equipped with a heat dissipation device 9, which is used to dissipate heat for the electromagnetic drive device and the rear wheel of the electric-assisted bicycle 10 under test.

[0046] like Figure 1 As shown, the heat dissipation device 9 uses a fan.

[0047] like Figure 1 As shown, the load simulation device includes a load support frame 7 and a load 8 mounted on the load support frame 7. The bottom of the load support frame 7 is provided with a load connection structure for fixing to the saddle of the electric-assist bicycle 10 under test.

[0048] The load connection structure is preferably a quick-locking structure, which can be easily and quickly installed and removed to simulate riders of different weights and load weights.

[0049] In this embodiment, the load 8 is symmetrically arranged on the load support frame 7.

[0050] This embodiment applies weight to the saddle using a load simulation device, which can simulate the real load of the rider and the cargo.

[0051] To more realistically simulate the riding environment, the test platform also includes a wind resistance simulation device placed in front of the tested e-bike. The wind resistance simulation device provides matching wind force based on the monitored real-time vehicle speed to simulate air resistance during riding.

[0052] In this embodiment, the wind resistance simulation device is a variable frequency fan.

[0053] The electric-assisted bicycle test platform also includes an input controller, a motor controller, a resistance controller, a power supply, and sensors.

[0054] The signal input terminal of motor 3 controller is connected to the signal output terminal of input controller, and the signal output terminal of motor 3 controller is connected to motor 3. The signal input terminal of resistance controller is connected to the signal output terminal of input controller, and the signal output terminal of resistance controller is connected to resistance simulation device 6.

[0055] like Figure 1 As shown, sensor 11 is located between the output shaft of motor 3 and transmission assembly 5. Sensor 11 is connected to the signal input terminal of input controller to collect the torque and / or speed output by motor 3 and feed it back to input controller to form closed-loop control.

[0056] The power supply powers the electric-assist bicycle testing platform, specifically motor 3, motor 3 controller, various controllers, resistance controller, and auxiliary devices. The power supply connects to the signal input terminal of the input controller to collect voltage and current data for calculating energy conversion efficiency.

[0057] In this embodiment, the input controller can be any one of a programmable logic controller, a computer, or a microcontroller.

[0058] In some embodiments, the electric-assisted bicycle testing platform further includes a display connected to the signal output terminal of the input controller for displaying various measured and calculated values.

[0059] This embodiment provides a testing process for an electric-assisted bicycle whole vehicle testing platform.

[0060] The electric-assist bicycle 10 under test is fixed to the platform base 1. The bottom bracket of the electric-assist bicycle 10 is connected to the transmission assembly 5, the rear wheel rests on the resistance simulation device 6, and a load simulation device is installed at the saddle. The operator sets the test program through the input controller, which sends instructions to the motor 3 controller to control the motor 3 to output alternating pedal torque. This torque is amplified by the reducer 4 and transmitted to the bicycle bottom bracket through the transmission assembly 5, simulating the real human pedaling process. For example, the torque has two peak values ​​and two trough values ​​within one rotation of the bottom bracket. At the same time, the input controller sends instructions to the resistance controller to control the resistance simulation device 6 to dynamically change the load, simulating riding resistance on inclines, declines, or different road surfaces. The wind resistance simulation device provides the corresponding wind resistance based on the real-time calculated vehicle speed. The torque and speed data collected in real time by the sensor 11 are fed back to the input controller for monitoring, recording, and adjusting the test process, thereby achieving highly repeatable testing of the overall performance of the electric-assist bicycle.

[0061] The testing process of an electric-assisted bicycle test platform also includes calculating the conversion efficiency of the whole vehicle's electrical energy into driving mechanical energy, which is achieved through the following steps: calculating the product of the load torque value and the rear wheel speed value to obtain the first power p1 used to overcome the load torque; calculating the product of the pedal torque value and the bottom bracket speed value to obtain the second power p2 used to represent the pedal input; calculating the product of the electric-assisted bicycle power supply current and voltage to obtain the whole vehicle's input electrical power p3; and calculating (p1-p2) / p3 to obtain the conversion efficiency of the whole vehicle's electrical energy into driving mechanical energy.

[0062] This embodiment can accurately and repeatably simulate real riding conditions, overcoming the problems of poor repeatability, low consistency, and difficulty in reproducing extreme conditions that exist in traditional manual testing. It can reproduce real riding conditions and realize the overall performance testing of electric-assisted bicycles.

[0063] In the description of this patent, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this patent and simplifying the description, 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, and therefore should not be construed as a limitation of this patent. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0065] Although this patent has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent should be included within the protection scope of this patent.

Claims

1. A testing platform for an electric-assisted bicycle, characterized in that, include: Platform base, test bench, transmission components, resistance simulation device, and load simulation device; The test bench is mounted on the platform base, and the test bench includes a motor; One end of the transmission assembly is connected to the output shaft of the motor, and the other end is provided with a connecting part for connecting to the bottom bracket of the electric-assist bicycle under test. The resistance simulation device is connected to the rear wheel of the electric-assisted bicycle under test. The load simulation device includes a load support frame and a load mounted on the load support frame. The bottom of the load support frame is provided with a load connection structure for fixing to the saddle of the electric-assisted bicycle under test.

2. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The test bench also includes a speed reducer, which is connected to the output shaft of the motor, and the transmission assembly is connected to the output end of the speed reducer.

3. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The transmission component is a universal joint or linkage mechanism, used to mechanically and adaptively adjust the height difference and horizontal distance between the bottom bracket of the electric-assisted bicycle under test and the test bench.

4. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The resistance simulation device includes an electromagnetic drive device or a mechanical load device. The electromagnetic drive device is connected to the rear wheel of the electric-assisted bicycle under test through frictional coupling, and the mechanical load device is fixedly connected to the flywheel of the rear wheel of the electric-assisted bicycle under test through mechanical connection.

5. The electric-assisted bicycle whole-vehicle testing platform according to claim 4, characterized in that, When the resistance simulation device uses an electromagnetic drive device, the electric-assisted bicycle test platform is equipped with a heat dissipation device for cooling the electromagnetic drive device and the rear wheel of the electric-assisted bicycle under test.

6. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The electric-assisted bicycle testing platform also includes a wind resistance simulation device located in front of the electric-assisted bicycle being tested.

7. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The electric-assist bicycle testing platform also includes a power supply for powering the electric-assist bicycle testing platform.

8. The electric-assisted bicycle whole-vehicle testing platform according to claim 1, characterized in that, The electric-assisted bicycle test platform also includes an input controller, a motor controller, and a resistance controller; The signal input terminal of the motor controller is connected to the signal output terminal of the input controller, and the signal output terminal of the motor controller is connected to the motor. The signal input terminal of the resistance controller is connected to the signal output terminal of the input controller, and the signal output terminal of the resistance controller is connected to the resistance simulation device.

9. The electric-assisted bicycle whole-vehicle testing platform according to claim 8, characterized in that, The electric-assisted bicycle test platform also includes a sensor located between the motor's output shaft and the transmission assembly. The sensor is connected to the signal input terminal of the input controller and is used to collect the torque and / or speed output by the motor.

10. The electric-assisted bicycle whole-vehicle testing platform according to claim 8, characterized in that, The input controller can be any one of a programmable logic controller, a computer, or a microcontroller.

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