Electric vehicle wheel friction force testing device

Abstract

The utility model provides an electric vehicle wheel friction force testing device comprising a placing plate, lower end faces of two sides of the placing plate are fixedly connected with a first support plate and a second support plate, the middle of the first support plate is provided with a first support plate and a second support plate, the first support plate is internally provided with a first support hole, and the second support plate is internally provided with a second support hole. A rotating shaft is rotationally matched in the first supporting hole, a motor is arranged at one end of the rotating shaft, and the motor is connected to one side of the first supporting plate through a fixing frame; and an auxiliary assembly is arranged on one side face of the containing plate, it can be effectively guaranteed that the containing plate and the wheels vertically move towards one side through sliding fit of sliding blocks and sliding grooves, the problem that the wheels incline towards the two sides is avoided, and the accuracy of friction force between the wheels and the ground can be improved.

Description

Technical Field

[0001] This utility model relates to the field of wheel friction testing technology, and in particular to a device for testing the friction of electric vehicle wheels. Background Technology

[0002] Electric vehicles, or electric-powered vehicles, use batteries as their energy source. They convert electrical energy into mechanical energy through components such as controllers and motors, and their speed is controlled by adjusting the current. They are convenient and economical.

[0003] Currently, in testing wheel friction, the wheels are prone to tilting to both sides, resulting in a large error in the measured friction between the electric vehicle tire and the road surface, reducing accuracy. Moreover, disassembling and assembling the wheels is time-consuming and laborious, reducing practicality.

[0004] To address the problems in the existing technology, an electric vehicle wheel friction testing device is provided. Utility Model Content

[0005] In view of this, this utility model proposes an electric vehicle wheel friction testing device to solve the problems of wheel tilting to both sides and the time-consuming and laborious process of disassembling and assembling wheels.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides an electric vehicle wheel friction force testing device, including a placement plate. A first support plate and a second support frame plate are fixedly connected to the lower ends of both sides of the placement plate. A first bracket plate and a second bracket plate are provided in the middle of the first support plate. A first support hole is opened inside the first support hole, and a rotating shaft is rotatably fitted inside the first support hole. A motor is provided at one end of the rotating shaft. The motor is connected to one side of the first support plate through a fixing frame. A disassembly and assembly assembly is connected to one end of the rotating shaft through a first screw. A wheel is provided in the middle of the disassembly and assembly assembly. An auxiliary component is provided on one side of the placement plate.

[0007] Furthermore, preferably, the disassembly and assembly assembly includes a connecting rod, which is connected to one end of the rotating shaft via a first screw. One end of the connecting rod is threaded, and a fixing sleeve is fitted on the outer side of one end of the connecting rod. The fixing sleeve has a first threaded hole inside, and fixing rods are evenly distributed around one side of the fixing sleeve at equal angles. One end of the connecting rod is fixedly connected to a limit plate, and one end of the connecting rod is rotatably fitted into a second support hole in the middle of the second support frame plate. A force sensor is provided at one end of the connecting rod.

[0008] Furthermore, preferably, one end of the connecting rod abuts against the inside of a placement hole formed in the middle of the second support plate.

[0009] Furthermore, preferably, the fixing sleeve and the limiting plate are fixedly connected to the wheel, and the wheel is fitted inside the middle of the connecting rod.

[0010] Furthermore, preferably, the auxiliary component includes a connecting plate, one side of which is fixedly connected to one side of the placement plate, and both sides of the connecting plate have connecting holes, and both connecting holes have fixing posts fitted inside them. The upper end face of the fixing post has a second threaded hole, and the upper end face of the connecting plate abuts against a pressure plate. Both sides of the pressure plate have through holes, and the pressure plate is fixedly connected inside the through holes and the second threaded hole by a second screw.

[0011] Furthermore, preferably, a movable plate is fixedly connected to the lower end face of the two fixed columns, and a slider is connected to one side of each movable plate. The slider slides in a groove opened on the upper end face of the guide rail frame.

[0012] Furthermore, preferably, the connecting rod and the rotating shaft are concentrically connected.

[0013] The present invention has the following advantages over the prior art:

[0014] (1) The electric vehicle wheel friction test device disclosed in this utility model allows the worker to put the wheel on the outside of the connecting rod and move it to one side of the limiting plate. Then, the worker puts the fixing plate on the outside of the connecting rod and pushes the fixing plate to the thread. After reaching the thread, the worker rotates the fixing plate. The second threaded hole on the fixing plate is screwed into the thread. After the fixing plate presses against the wheel on one side, it can be tightened by multiple fixing rods to fix the wheel in the middle of the connecting rod. Then, the connecting rod is pulled to one side to the placement hole and fixed to the connecting rod and the rotating shaft by the first screw. Thus, the wheel installation work is completed. This is conducive to simple and convenient installation and disassembly, saving time and effort and improving practicality.

[0015] (2) By fixing the second screw, the placement plate, motor and connecting rod can be kept at the same height, which facilitates installation and disassembly.

[0016] (3) By sliding the slider and the groove, the placement plate and the wheel can be effectively ensured to move vertically to one side, avoiding the problem of the wheel tilting to both sides, and improving the accuracy of the friction force between the wheel and the ground. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 This is a schematic diagram of the electric vehicle wheel friction testing device disclosed in this utility model;

[0019] Figure 2 This is a schematic diagram of the first support plate of the electric vehicle wheel friction force testing device disclosed in this utility model;

[0020] Figure 3 This is a partial enlarged view of the fixing sleeve of the electric vehicle wheel friction force testing device disclosed in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the limiting plate of the electric vehicle wheel friction force testing device disclosed in this utility model.

[0022] Figure 5 This is a partial enlarged view of the fixing column of the electric vehicle wheel friction force testing device disclosed in this utility model.

[0023] Attached image labels:

[0024] 1-Placement plate, 11-First support plate, 12-First bracket plate, 121-First support hole, 13-Second bracket plate, 131-Placement hole, 14-Second support frame plate, 141-Second support hole, 15-Rotating shaft, 16-Motor, 17-Fixed frame, 18-First screw, 2-Disassembly assembly, 21-Connecting rod, 211-First threaded hole, 22-Fixed sleeve plate, 221-First threaded hole, 222-Fixed rod, 23-Limiting plate, 24-Force sensor, 3-Wheel, 4-Auxiliary assembly, 41-Connecting plate, 411-Connecting hole, 42-Fixed column, 421-Second threaded hole, 43-Pressure plate, 431-Through hole, 44-Second screw, 45-Moving plate, 46-Slider, 47-Guide rail frame, 48-Slide groove. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0026] like Figure 1 , Figure 2 As shown, combined with Figure 3-5 This utility model discloses an electric vehicle wheel friction testing device, including a placement plate 1. A first support plate 11 and a second support frame plate 14 are fixedly connected to the lower ends of both sides of the placement plate 1. A first bracket plate 12 and a second bracket plate 13 are provided in the middle of the first support plate 11. A first support hole 121 is opened inside the first support hole 121, and a rotating shaft 15 is rotatably fitted inside the first support hole 121. A motor 16 is provided at one end of the rotating shaft 15. The motor 16 is connected to one side of the first support plate 11 through a fixing frame 17. A disassembly and assembly assembly 2 is connected to one end of the rotating shaft 15 through a first screw 18. A wheel 3 is provided in the middle of the disassembly and assembly assembly 2. An auxiliary assembly 4 is provided on one side of the placement plate 1.

[0027] In this embodiment, the disassembly and assembly assembly 2 includes a connecting rod 21, which is connected to one end of the rotating shaft 15 via a first screw 18. One end of the connecting rod 21 is provided with a thread 211, and a fixing sleeve 22 is sleeved on the outer side of one end of the connecting rod 21. The fixing sleeve 22 has a first threaded hole 221 inside, and fixing rods 222 are evenly distributed around one side of the fixing sleeve 22 at equal angles. One end of the connecting rod 21 is fixedly connected to a limit plate 23, and one end of the connecting rod 21 is rotatably engaged in a second support hole 141 opened in the middle of the second support frame plate 14. A force sensor 24 is provided at one end of the connecting rod 21. The worker places the wheel 3 on the outside of the connecting rod 21 and moves it to one side of the limiting plate 23. Then, the worker places the fixing plate 22 on the outside of the connecting rod 21 and pushes the fixing plate 22 to the thread 211. After reaching the thread 211, the worker rotates the fixing plate 22. The second threaded hole 221 on the fixing plate 22 is screwed into the thread 211. After the fixing plate 22 presses against the wheel 3, it can be tightened by multiple fixing rods 222 to fix the wheel 3 in the middle of the connecting rod 21. Then, the worker pulls the connecting rod 222 to one side onto the placement hole 131 and fixes it to the connecting rod 21 and the rotating shaft 15 by the first screw 18. Thus, the installation of the wheel 3 is completed. This work process is simple and convenient for installation and disassembly, saving time and effort and improving practicality.

[0028] In this embodiment, one end of the connecting rod 21 abuts against the interior of the placement hole 131 formed in the middle of the second bracket plate 13. This placement hole 131 allows the connecting rod 21 to prevent the weight of the wheel 3 from being entirely concentrated in the second support hole 141 after the first screw 18 is removed, thus avoiding damage to the second support hole 141.

[0029] In this embodiment, the fixing sleeve 22 and the limiting plate 23 are fixedly connected to the wheel 3, and the wheel 3 is fitted inside the middle of the connecting rod 21. The fixing sleeve 22 and the limiting plate 23 ensure that the wheel 21 will not loosen during rotation.

[0030] In this embodiment, the auxiliary component 4 includes a connecting plate 41. One side of the connecting plate 41 is fixedly connected to one side of the placement plate 1. Connecting holes 411 are provided inside both sides of the connecting plate 41, and fixing posts 42 are fitted inside each of the two connecting holes 411. A second threaded hole 421 is provided on the upper end face of each fixing post 42. A pressure plate 43 is pressed against the upper end face of the connecting plate 41. Through holes 431 are provided on both sides of the pressure plate 43, and the pressure plate 43 is fixedly connected inside the through holes 431 and the second threaded hole 421 by a second screw 44. The placement plate 1 is fixed to the pressure plate 43, the connecting plate 41, and the fixing posts 43 by the second screw 44, ensuring that the placement plate 1, the motor 16, and the connecting rod 21 remain at the same height. The same height refers to the height at which they are fixed to the fixing posts 43. Figure 4 As shown, this helps to ensure that the same height is maintained during installation or disassembly, which facilitates the installation and disassembly work.

[0031] In this embodiment, a movable plate 45 is fixedly connected to the lower end face of two fixed columns 42. A slider 46 is connected to one side of each movable plate 45. The slider 46 slides in a groove 48 opened on the upper end face of the guide rail frame 47. By rotating the wheel 3, the placement plate 1, the first support plate 11, the second support frame plate 14, the motor 16, and the fixed frame 17 move to one side. At the same time, the force of the placement plate 1 to one side is transmitted to the connecting plate 41. The connecting plate 41 is fixed by the second screw 44, which allows the movable plate 45 to drive the slider 46 to slide to one side in the groove 48. This can effectively ensure that the placement plate 1 and the wheel 3 move vertically to one side, avoid the problem of the wheel 3 tilting to both sides, and improve the accuracy of the friction force between the wheel 3 and the ground.

[0032] In this embodiment, the connecting rod 21 and the rotating shaft 15 are concentrically connected, ensuring that the wheel 21 rotates stably on the ground.

[0033] The working principle of this utility model is as follows:

[0034] In this utility model, firstly, the wheel 3 is installed. Before installing the wheel 3, the two first screws 18 are disassembled using tools. After disassembly, the connecting rod 21 is held and pulled to one side. The connecting rod 21 slides to one side inside the placement hole 131 and the second support hole 141 under force until one end of the connecting rod 21 is disengaged from the placement hole 131 by a certain distance (the relative distance between the connecting rod 21 and the placement hole 131 is sufficient for the wheel 3 to be installed). Then, the fixing sleeve 22 on the connecting rod 21 is unscrewed (the placement plate 1 is fixed to the pressure plate 43, the connecting plate 41, and the fixing post 43 by the second screw 44, which ensures that the placement plate 1, the motor 16, and the connecting rod 21 are always kept at the same height. The same height refers to the height fixed to the fixing post 43, such as...). Figure 4 As shown), the height of the placement plate 1 will not be affected by the disassembly and assembly of the wheel 3. Then, the worker puts the wheel 3 on the outside of the connecting rod 21 and moves it to one side of the limiting plate 23. Then, the worker puts the fixing plate 22 on the outside of the connecting rod 21 and pushes the fixing plate 22 to the thread 211. After reaching the thread 211, the worker rotates the fixing plate 22. The second threaded hole 221 on the fixing plate 22 is screwed into the thread 211. After the fixing plate 22 presses against the wheel 3 on one side, it can be tightened by multiple fixing rods 222 to fix the wheel 3 in the middle of the connecting rod 21. Then, the worker pulls the connecting rod 222 to one side onto the placement hole 131 and fixes it to the connecting rod 21 and the rotating shaft 15 by the first screw 18. Thus, the work of installing the wheel 3 is completed.

[0035] After installing the wheel 3, sandbags of different weights can be placed on the placement plate 1. Then, the starter motor 16 activates the rotating shaft 15 and connecting rod 21 to rotate counterclockwise. The connecting rod 21 rotates counterclockwise within the placement hole 131 and the second support hole 141, causing the wheel 3 to rotate counterclockwise on the ground. The rotation of the wheel 3 causes the placement plate 1, the first support plate 11, the second support frame plate 14, the motor 16, and the fixing frame 17 to move to one side. Simultaneously, the force from the placement plate 1 to one side is transmitted to the connecting plate 41, which is then subjected to force... The fixing of the second screw 44 allows the moving plate 45 to drive the slider 46 to slide to one side within the groove 48. As the wheel 3 rotates to one side, the friction force between the wheel 3 and the ground can be captured by the force sensor 24 and provided to the data panel. However, the friction force between the slider 26 and the groove 28 must also be considered. It can be calculated using the formula F=muN or other formulas. The friction force between the slider 26 and the groove 28 is subtracted from the friction force obtained by the force sensor 24 to obtain the friction force between the wheel 3 and the ground, thus realizing the work of detecting friction force.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric vehicle wheel friction testing device comprising a placement plate (1), characterized in that: Both lower end faces of the placing plate (1) are fixedly connected with a first support plate (11) and a second support frame plate (14), the middle part of the first support plate (11) is provided with a first support plate (12) and a second support plate (13), the first support plate (12) is internally provided with a first support hole (121), the first support hole (121) is internally rotatably connected with a rotating shaft (15), one end of the rotating shaft (15) is provided with a motor (16), the motor (16) is connected to one side of the first support plate (11) through a fixing frame (17); one end of the rotating shaft (15) is connected with a dismounting assembly (2) through a first screw rod (18), the middle part of the dismounting assembly (2) is provided with a wheel (3); one side of the placing plate (1) is provided with an auxiliary assembly (4).

2. The electric vehicle wheel friction test apparatus of claim 1, wherein: The dismounting assembly (2) comprises a connecting rod (21), the connecting rod (21) is connected to one end of the rotating shaft (15) through the first screw rod (18), one end of the connecting rod (21) is provided with a thread (211), one end of the connecting rod (21) is externally provided with a fixed sleeve plate (22), the fixed sleeve plate (22) is internally provided with a first threaded hole (221), and the side surface of the fixed sleeve plate (22) is annularly and equiangularly connected with a fixing rod (222); one end of the connecting rod (21) is fixedly connected with a limiting plate (23), one end of the connecting rod (21) is rotatably connected to a second support hole (141) formed in the middle part of the second support frame plate (14), and one end of the connecting rod (21) is provided with a force sensor (24).

3. The electric vehicle wheel friction test apparatus of claim 2, wherein: One end of the connecting rod (21) is externally abutted in the placing hole (131) formed in the middle part of the second support plate (13).

4. The electric vehicle wheel friction test apparatus of claim 2, wherein: The fixed sleeve plate (22) and the limiting plate (23) are fixedly connected to the wheel (3) relative to each other, and the wheel (3) is internally sleeved in the middle part of the connecting rod (21).

5. The electric vehicle wheel friction test apparatus of claim 1, wherein: The auxiliary assembly (4) comprises a connecting plate (41), one side surface of the connecting plate (41) is fixedly connected to one side surface of the placing plate (1), the interiors of both sides of the connecting plate (41) are provided with a connecting hole (411), the interiors of the two connecting holes (411) are sleeved with a fixed column (42), the upper end surface of the fixed column (42) is provided with a second threaded hole (421), the upper end surface of the connecting plate (41) is abutted with a pressing plate (43), both sides of the pressing plate (43) are provided with a through hole (431), and the pressing plate (43) is fixedly connected to the interiors of the through hole (431) and the second threaded hole (421) through a second screw rod (44).

6. The electric vehicle wheel friction test apparatus of claim 5, wherein: The lower end surfaces of the two fixed columns (42) are fixedly connected with a moving plate (45), one side of the moving plate (45) is connected with a sliding block (46), and the sliding block (46) is slidingly connected to a sliding groove (48) formed in the upper end surface of a guide rail long frame (47).

7. The electric vehicle wheel friction test apparatus of claim 2, wherein: The connecting rod (21) and the rotating shaft (15) are concentrically connected.

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