Fatigue strength test equipment for whole electric scooter

Abstract

The utility model discloses a fatigue strength test device for a whole electric scooter. The fatigue strength test device comprises a roller assembly and a fixed support which are arranged in sequence. The roller assembly comprises a roller support, a driving piece and a testing roller, the testing roller is rotatably arranged on the roller support, the driving piece can drive the testing roller to rotate around the axis of the testing roller, a boss assembly is arranged on the periphery of the testing roller, and the boss assembly comprises three bosses evenly distributed on the periphery of the roller; the fixing support comprises a bearing platform and a clamping frame. In a test state, a front wheel of the electric scooter is placed on the test roller, a rear wheel of the electric scooter is placed on the bearing platform, and a steering rod and a grip of the electric scooter are clamped on the clamping frame. According to the utility model, the fatigue strength of the finished automobile 6.4.8 in GB / T42825-2023 can be tested, and all test conditions of the equipment meet standard requirements. The overall design is reasonable and use is convenient. The electric scooter fixing support is suitable for fixing most electric scooters.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, and more specifically, to a fatigue strength testing device for an electric scooter. Background Art

[0002] The electric scooter whole vehicle fatigue strength test equipment meets the technical requirements of the whole vehicle fatigue strength test in Article 6.4.8 of the national standard GB / T 42825-2023 "General Technical Specifications for Electric Scooters". The equipment is used to perform fatigue strength tests on electric scooters.

[0003] GB / T 42825-2023 Section 6.4.8 Vehicle fatigue strength requirements are as follows:

[0004] Place and secure the manufacturer's maximum load at the center of the test vehicle's pedals. Apply a 5kg load to the center of each of the two grips. Secure the rear wheel of the electric scooter and place the front wheel on a roller with a diameter of at least 700mm. Three 15mm high bosses are evenly installed on the roller surface. The roller is driven at a constant speed of 2m / s for 50km. After the test, visually inspect all parts of the test vehicle for any abnormalities. When testing multi-track test vehicles, stagger the bosses to prevent two or more wheels from passing over them simultaneously. Note: For test vehicles without grips on the handlebar tube, the center of force is 50mm from the end of the handlebar tube.

[0005] In summary, requirement 6.4.8 of GB / T 42825-2023 only puts forward test requirements, but does not propose specific test plans and test equipment.

[0006] Therefore, how to provide an electric scooter vehicle fatigue strength testing equipment that meets all the technical parameters of the standard, is convenient for testers to fix the electric scooter, and can ensure the stability of the scooter during the test process has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of the utility model is to provide an electric scooter whole vehicle fatigue strength testing device which is easy to use and can ensure the stability of the scooter during the testing process.

[0008] The utility model provides a fatigue strength testing device for an electric scooter, comprising a roller assembly and a fixing bracket arranged in sequence;

[0009] The roller assembly includes a roller bracket, a driving member and a test roller. The test roller is rotatably arranged on the roller bracket. The driving member can drive the test roller to rotate around its axis. The outer periphery of the test roller is provided with a boss assembly, which includes three bosses evenly distributed on the outer periphery of the roller.

[0010] The fixed bracket includes a bearing platform and a snap-fit bracket;

[0011] In the test state, the front wheel of the electric scooter is placed on the test roller, the rear wheel of the electric scooter is placed on the load-bearing platform, and the steering rod and handle of the electric scooter are clamped on the clamping frame.

[0012] Optionally, at least two groups of boss assemblies are provided, the two groups of boss assemblies are arranged in sequence in the axial direction of the roller, and the bosses of the two groups of boss assemblies are staggered with each other.

[0013] Optionally, the test roller is a wooden roller, and the outer circumference of the wooden roller is covered with a metal plate.

[0014] Optionally, the diameter of the wooden roller is greater than or equal to 700 mm;

[0015] The wooden roller is fixed to the roller bracket via a 25mm diameter steel shaft and bearings.

[0016] Optionally, the driving component includes a speed-regulating motor, which is coaxially connected to the steel shaft.

[0017] Optionally, the roller assembly further includes a motor speed regulator and a speed meter, and both the motor speed regulator and the speed meter are electrically connected to the speed regulating motor.

[0018] Optionally, the height of the boss is 15 mm, the top width is 20 mm, the length in the uphill direction is 17 mm, and the angle in the downhill direction is 45°.

[0019] Optionally, the electric scooter fatigue strength testing equipment further includes a first counterweight and a second counterweight;

[0020] Two first counterweights are provided, and the two first counterweights can be hung on both ends of the handlebars of the electric scooter respectively;

[0021] A second counterweight may be placed on the pedal platform of the electric scooter.

[0022] Optionally, the roller bracket and the fixed bracket are made of aluminum profile bracket.

[0023] Optionally, the aluminum profile bracket includes 4040 aluminum profile and 4080 aluminum profile.

[0024] According to the technical content disclosed in this utility model, the following beneficial effects are achieved:

[0025] The electric scooter whole vehicle fatigue strength testing equipment provided by the utility model, in the test state, the rear wheel of the electric scooter is placed on the load-bearing platform, the steering rod and the handle of the electric scooter are clamped on the clamping frame, so that the electric scooter is firmly fixed on the fixed bracket, and the front wheel of the electric scooter is placed on the test roller. The driving part drives the test roller to rotate around its axis, thereby driving the front wheel of the electric scooter to rotate. The electric scooter is always stably fixed during the test process, meeting the test requirements.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0028] Figure 1 This is the main structural diagram of the electric scooter vehicle fatigue strength testing equipment of the present utility model.

[0029] Figure 2 This is a side structural diagram of the electric scooter fatigue strength testing equipment of the present utility model.

[0030] Explanation of the accompanying reference numerals: 1. electric scooter; 2. fixing bracket; 3. locking bracket; 4. first counterweight; 5. second counterweight; 6. roller bracket; 7. test roller; 8. boss; 9. steel shaft; 10. speed regulating box; 11. speed regulating motor. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] See also Figure 1 and Figure 2 The utility model discloses a fatigue strength testing device for an electric scooter, comprising a roller assembly and a fixed bracket 2 arranged in sequence; the roller assembly comprises a roller bracket 6, a driving member and a test roller 7, the test roller 7 is rotatably arranged on the roller bracket 6, and the driving member can drive the test roller 7 to rotate around its axis; specifically, the test roller 7 is a wooden roller, and the outer periphery of the wooden roller is covered with a metal plate. The diameter of the wooden roller is greater than or equal to 700 mm. In this embodiment, the diameter of the wooden roller is equal to 700 mm. The wooden roller is wrapped with a thin iron plate. The wooden roller is fixed to the roller bracket 6 through a steel shaft 9 with a diameter of 25 mm and a bearing. The steel shaft 9 is connected to the shaft of the speed-regulating motor 11 through a steel adapter. The speed-regulating motor 11 provides rotational power to the test roller 7 through the shaft and the connecting piece. A motor speed regulator and a speedometer are installed on the speed-regulating box 10. The motor speed regulator and the speedometer are both electrically connected to the speed-regulating motor 11. The motor speed regulator is used to adjust the speed of the wooden roller, and the speedometer records the scooter's travel speed (the speed of the roller's outer ring) and mileage (the total circle length of the roller's outer ring).

[0037] The test roller 7 is equipped with a boss assembly on its outer circumference. This assembly consists of three bosses 8 evenly distributed around the roller's periphery. The bosses 8 are arranged in at least two groups, arranged sequentially along the roller's axial direction. The bosses 8 in each group are staggered, meaning they are not aligned in a straight line. The bosses 8 are 15mm high, 20mm wide at the top, 17mm long in the uphill direction, and angled 45° in the downhill direction. In short, six bosses are evenly distributed along the outer surface of the test roller 7, arranged in groups of three, with every two bosses staggered. The boss dimensions meet standard requirements.

[0038] Furthermore, the fixing bracket 2 includes a load-bearing platform and a snap-fit frame 3. The electric scooter fatigue strength testing equipment also includes a first counterweight 4 and a second counterweight 5. Two first counterweights 4 are provided, each of which can be hung on either end of the handlebar of the electric scooter 1; the second counterweight 5 can be placed on the pedal platform of the electric scooter 1. The first counterweight 4 has a load capacity of 5 kg, while the second counterweight 5 has a weight equal to the specified maximum load.

[0039] In the test state, the front wheel of the electric scooter 1 is placed on the test roller 7 , the rear wheel of the electric scooter 1 is placed on the load-bearing platform, and the steering rod and handle of the electric scooter 1 are clamped on the clamping frame 3 .

[0040] The components and materials used in the fatigue strength test equipment for electric scooters are shown in Table 1.

[0041] Table 1 Components and materials

[0042]

[0043]

[0044] Furthermore, the roller bracket 6 and the fixed bracket 2 are made of aluminum profile brackets.

[0045] Furthermore, the aluminum profile bracket includes 4040 aluminum profile and 4080 aluminum profile. Specific embodiment:

[0047] Nine log disks with a diameter of 700 mm and a thickness of 30 mm are coaxially stacked to form the test roller 7. A circular hole with a diameter of 25 mm is opened in the center of the log disk. A steel shaft with a diameter of 25 mm and a length of 500 mm passes through the circular hole and is fixed to the roller bracket through two bearings.

[0048] Cover the roller sides with a thin iron plate 270mm wide, 2200mm long, and 1mm thick, and secure it to the roller with screws. Attach a boss every 733mm on the iron plate. A set of three bosses is used, two sets in total, staggered 100mm apart. The boss dimensions meet standard requirements (15mm height, 20mm top width, 17mm uphill, and 45° downhill).

[0049] The speed regulating motor 11 driving the roller is fixed on an aluminum profile bracket with a height of 490 mm. The motor driving shaft is connected to the steel shaft 9 of the roller through a connecting piece to drive the roller to rotate.

[0050] The motor speed regulator and electronic meter-meter linear speedometer are mounted on top of a 180mm*230mm*500mm speedometer control box. The box is constructed from aluminum extrusions and aluminum-plastic panels. The motor speed regulator adjusts and controls the motor speed, while the electronic meter-meter linear speedometer uses a sensor to measure the speed and mileage of the roller's outer ring. The motor speed regulator's power supply is connected to the electronic meter-meter linear speedometer's control terminal. When the mileage set by the meter-meter linear speedometer is reached, the motor speed regulator's power supply is disconnected, the motor stops driving the roller, and the test ends.

[0051] The roller bracket and electric scooter mounting bracket are constructed from 4040 and 4080 aluminum profiles. All load-bearing components and some functional parts are constructed from 4080 aluminum profile, while other connecting components are constructed from 4040 aluminum profile. The aluminum profile brackets used in the electric scooter mounting bracket facilitate adjustment of the scooter's test position; simply adjusting the angle bracket at the connection allows for adaption to different scooter sizes.

[0052] In summary, the electric scooter fatigue strength test equipment provided by this utility model can perform full vehicle fatigue strength testing according to Section 6.4.8 of GB / T42825-2023, and all test conditions meet the standard requirements. The overall design is rational and easy to use. The electric scooter mounting bracket is suitable for securing most electric scooters. The components are durable and high-strength, making the equipment less susceptible to damage during long-term testing. It is highly reliable and easy to operate.

[0053] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An electric scooter vehicle fatigue strength testing equipment, characterized in that: include: The roller assembly and the fixing bracket are arranged in sequence; The roller assembly includes a roller bracket, a driving member, and a test roller. The test roller is rotatably mounted on the roller bracket. The driving member can drive the test roller to rotate around its axis. A boss assembly is provided on the periphery of the test roller. The boss assembly includes three bosses evenly distributed on the periphery of the roller. The fixed bracket includes a bearing platform and a snap-fit bracket; In the test state, the front wheel of the electric scooter is placed on the test roller, the rear wheel of the electric scooter is placed on the carrying platform, and the steering rod and the handle of the electric scooter are clamped on the clamping frame.

2. The electric scooter fatigue strength testing equipment according to claim 1, characterized in that: At least two groups of the boss assemblies are provided, and the two groups of the boss assemblies are arranged in sequence in the axial direction of the roller, and the bosses of the two groups of the boss assemblies are staggered with each other.

3. The electric scooter fatigue strength testing equipment according to claim 1 or 2, characterized in that: The test roller is a wooden roller, and the outer periphery of the wooden roller is covered with a metal plate.

4. The electric scooter fatigue strength testing equipment according to claim 3, characterized in that: The diameter of the wooden roller is greater than or equal to 700 mm; The wooden roller is fixed on the roller bracket via a steel shaft with a diameter of 25 mm and a bearing.

5. The electric scooter fatigue strength testing equipment according to claim 4, characterized in that: The driving component includes a speed regulating motor, and the speed regulating motor is coaxially connected to the steel shaft.

6. The electric scooter fatigue strength testing equipment according to claim 5, characterized in that: The roller assembly further comprises a motor speed regulator and a speedometer, and both the motor speed regulator and the speedometer are electrically connected to the speed regulating motor.

7. The electric scooter fatigue strength testing equipment according to claim 1 or 2, characterized in that: The height of the boss is 15 mm, the top width is 20 mm, the length in the uphill direction is 17 mm, and the angle in the downhill direction is 45°.

8. The electric scooter fatigue strength testing equipment according to claim 1 or 2, characterized in that: The electric scooter fatigue strength testing equipment further includes a first counterweight and a second counterweight; Two first counterweights are provided, and the two first counterweights can be hung on both ends of the handlebar of the electric scooter respectively; The second counterweight may be placed on a pedal platform of the electric scooter.

9. The electric scooter fatigue strength testing equipment according to claim 1 or 2, characterized in that: The roller bracket and the fixed bracket are made of aluminum profile bracket.

10. The electric scooter fatigue strength testing equipment according to claim 9, characterized in that: The aluminum profile bracket includes 4040 aluminum profile and 4080 aluminum profile.

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