Transmission device for automobile hub motor performance test

Abstract

The utility model relates to a transmission device for testing the performance of an automobile hub motor, which comprises two hinged open-web transmission force arms, the two open-web transmission force arms are respectively a 1-shaped force arm and a 7-shaped force arm, the geometric center position of the 1-shaped force arm and the geometric center position of the long-side force arm of the 7-shaped force arm are respectively provided with a through hole, and the through holes are communicated with the through holes. The two hollow transmission force arms are hinged by a hinge bolt through a through hole, the hollow parts of the transmission force arms are used for fixing rim bolts on the hub motor and dynamometer force arm bolts on the dynamometer transmission force arm, the number of the rim bolts on the hub motor can be four or five, and the distribution radius of the rim bolts can be adjusted at will. The distance between the two dynamometer force arm bolts on the dynamometer transmission force arm can be adjusted at will. The device is simple in structure, can be suitable for hub motors with rim bolts with different numbers and different distribution radiuses, and can reliably and stably perform power transmission between a dynamometer and the hub motor so far.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a transmission device used for performance testing of automobile hub motors. Background Art

[0002] With the rapid development of new energy vehicles, the use of in-wheel motors (IHMs) is becoming increasingly widespread. IHMs are motors that not only provide power but also act as wheel hubs. The tire is mounted on the outer edge of the motor, significantly saving chassis space and reducing chassis weight. After the IHM is designed and manufactured, it must be tested for performance, such as torque, speed, and power. These tests typically require the use of a dynamometer. When using a dynamometer to test motor performance, a common practice is to design a transmission device to connect the IHM's rim bolts to the dynamometer's transmission arm to ensure a stable and reliable connection between the dynamometer and the motor under test. However, IHMs typically have four or five rim bolts, and the rim bolts are distributed at varying radii. Therefore, different transmission devices must be designed for different motors, which results in higher manufacturing costs and a longer manufacturing cycle. Therefore, it is necessary to design a transmission device for IHM performance testing to ensure stable and reliable transmission between the dynamometer and different types of IHMs. Utility Model Content

[0003] In response to the above problems, the utility model provides a transmission device for automobile hub motor performance testing which has a simple structure, is easy to manufacture, satisfies the requirements of stable and reliable connection between the dynamometer and the motor to be tested, and is suitable for performance testing of hub motors of different models.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: a transmission device for testing the performance of an automobile hub motor, comprising a 7-shaped lever arm, a 1-shaped lever arm and a hinge bolt for connecting the two lever arms, and at the same time, the 7-shaped lever arm and the 1-shaped lever arm are both hollow transmission lever arms, the 7-shaped lever arm comprises a short side lever arm and a long side lever arm connected, a through hole is provided at the geometric center position of the 1-shaped lever arm and the geometric center position of the long side lever arm of the 7-shaped lever arm, and the 7-shaped lever arm and the 1-shaped lever arm are hingedly connected by the bolt through the through hole. The hole completes the hinge, the hollow part of the 7-shaped lever arm forms through slot one, through slot two and through slot three, the hollow part of the 1-shaped lever arm forms through slot four and through slot five, the through slot one, through slot two, through slot three, through slot four and through slot five can all pass through the rim bolt and the dynamometer lever arm bolt, the rim bolt is fixed by installing the matching rim nut after passing through the through slot two or the through slot three or the through slot four or the through slot five, the dynamometer lever arm bolt is fixed by installing the matching dynamometer lever arm nut after passing through the through slot one or the through slot two or the through slot three or the through slot four or the through slot five.

[0005] Preferably, there are four or five rim bolts, and the distribution radius of the rim bolts is any size not exceeding the length of the 7-shaped lever arm or the 1-shaped lever arm; there are two dynamometer arm bolts, and the two dynamometer arm bolts are simultaneously arranged on the 7-shaped lever arm or the 1-shaped lever arm, and the spacing between the two dynamometer arm bolts is any size not exceeding the length of the 7-shaped lever arm or the 1-shaped lever arm.

[0006] Preferably, the long side arm and the short side arm of the 7-shaped arm are perpendicular to each other or form angles of other sizes.

[0007] Preferably, the angle between the 7-shaped lever arm and the 1-shaped lever arm can be adjusted to any size by a hinge bolt.

[0008] Preferably, the rim bolt passes through the second slot, the third slot, the fourth slot or the fifth slot and then fixes the transmission device to the hub motor by installing a matching rim nut, and the dynamometer arm bolt passes through the first slot, the second slot, the third slot, the fourth slot or the fifth slot and then fixes the transmission device to the dynamometer transmission arm of the dynamometer by installing a matching dynamometer arm nut.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention is designed with two hinged hollow transmission arms. The hinged design allows the angle between the two hollow transmission arms to be freely adjusted, so that it is applicable to hub motors with four rim bolts or five rim bolts, thereby improving the versatility of the device.

[0011] 2. The utility model is designed with two hinged hollow transmission arms. The hollow design allows the two transmission arms to be stably connected to hub motors with different rim bolt distribution radii, further improving the versatility of the device.

[0012] 3. The utility model has a simple structure, reasonable design, low manufacturing cost and short cycle, strong versatility, and is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection between the utility model and an embodiment of a hub motor (four rim bolts);

[0015] Figure 3 This is a schematic diagram of the connection between the utility model and another embodiment of the hub motor (five rim bolts);

[0016] Figure 4It is a schematic diagram of the overall connection between the utility model, the wheel hub motor and the dynamometer. DETAILED DESCRIPTION

[0017] The following will be combined Figure 1-4 The present invention is described in detail. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0018] A transmission device for testing the performance of an automobile hub motor, such as Figure 1 As shown, the utility model includes a 7-shaped lever arm 1-1, a 1-shaped lever arm 1-2 and a hinge bolt 1-3 for connecting the two lever arms. At the same time, the 7-shaped lever arm and the 1-shaped lever arm are both hollow transmission force arms. The 7-shaped lever arm includes a short side lever arm and a long side lever arm connected to each other. The long side lever arm and the short side lever arm are perpendicular to each other or form other angles. A through hole is provided at the geometric center position of the 1-shaped lever arm and the geometric center position of the long side lever arm of the 7-shaped lever arm, so that the 7-shaped lever arm and the 1-shaped lever arm are hinged by the hinge bolt through the through hole. The angle between the 7-shaped lever arm and the 1-shaped lever arm can be adjusted to any size by the hinge bolt, and the hollow part of the 7-shaped lever arm forms a through groove. The first through slot 1-4, the second through slot 1-5 and the third through slot 1-6, the hollow part of the I-shaped force arm forms a fourth through slot 1-7 and a fifth through slot 1-8, and the first through slot, the second through slot, the third through slot, the fourth through slot and the fifth through slot can all pass through the rim bolt 2-2 and the dynamometer force arm bolt 2-4. After the rim bolt passes through the second through slot or the third through slot or the fourth through slot or the fifth through slot, the transmission device is fixed to the hub motor 2-5 through the matching rim nut 2-1. The hub motor is provided with a main shaft 2-8. After the dynamometer force arm bolt passes through the first through slot or the second through slot or the third through slot or the fourth through slot or the fifth through slot, the transmission device is fixed to the dynamometer transmission force arm 2-7 of the dynamometer 2-6 through the matching dynamometer force arm nut 2-3.

[0019] Specifically, there are four or five rim bolts, and the distribution radius of the rim bolts is any size that does not exceed the length of the 7-shaped lever arm or the 1-shaped lever arm; there are two dynamometer arm bolts, and in the present invention, the two dynamometer arm bolts are simultaneously arranged on the 7-shaped lever arm or the 1-shaped lever arm, and the spacing between the two dynamometer arm bolts is any size that does not exceed the length of the 7-shaped lever arm or the 1-shaped lever arm.

[0020] like Figure 2As shown, in this embodiment, by loosening the hinge bolt, the 7-shaped lever arm and the 1-shaped lever arm can be freely rotated around the hinge bolt, so as to adjust the installation angle of the 7-shaped lever arm and the 1-shaped lever arm. By adjusting the angle, the rim bolt can be passed through the 7-shaped lever arm or the 1-shaped lever arm. When there are four rim bolts on the hub motor, the four rim bolts pass through the second, third, fourth and fifth through slots respectively. At this time, the angle between the 7-shaped lever arm and the 1-shaped lever arm is 90 degrees. Tighten the rim nut to tightly connect the rim bolt with the second, third, fourth and fifth through slots. Pass the two dynamometer lever arm bolts through the second and third through slots or through the fourth and fifth through slots, and tighten the dynamometer lever arm nut to tightly connect the dynamometer lever arm bolt with the second and third through slots or with the fourth and fifth through slots, thereby completing the mechanical transmission between the dynamometer and the hub motor.

[0021] like Figure 3 As shown, in this embodiment, when the number of rim bolts on the wheel hub is five, four of the five rim bolts pass through the second, third, fourth and fifth through slots respectively. At this time, the angle between the 7-shaped lever arm and the I-shaped lever arm is adjusted according to the different distribution radius of the five rim bolts. When the distribution radius of the five rim bolts is a certain size, the hinge bolt is loosened, and any two non-adjacent rim bolts of the hub motor are first passed through the fourth and fifth through slots on the I-shaped lever arm, and then the 7-shaped lever arm is rotated until two non-adjacent rim bolts of the remaining three rim bolts of the motor to be tested pass through the second and third through slots, and the rim nut is tightened to tightly connect the rim bolts with the second, third, fourth and fifth through slots, and two dynamometer lever arm bolts are passed through the first and third through slots, and the dynamometer lever arm nuts are tightened to tightly connect the dynamometer lever arm bolts with the first and third through slots, thereby completing the mechanical transmission between the dynamometer and the hub motor.

[0022] In this embodiment, by loosening the hinge bolts, the angle between the 7-shaped lever arm and the 1-shaped lever arm can be freely adjusted, and the hub motors with different numbers of rim bolts can be adapted. The through slots on the 7-shaped lever arm and the 1-shaped lever arm can be adapted to hub motors with different rim bolt distribution radii, and at the same time can be adapted to dynamometers with lever arms of different lengths. It has a wide range of applications, is easy to adjust, and is easy to use.

[0023] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A transmission device for testing the performance of an automobile hub motor, characterized by: The invention comprises a 7-shaped lever arm (1-1), a 1-shaped lever arm (1-2) and a hinge bolt (1-3) for connecting the two lever arms. The 7-shaped lever arm and the 1-shaped lever arm are both hollow transmission lever arms. The 7-shaped lever arm comprises a short side lever arm and a long side lever arm connected to each other. A through hole is provided at the geometric center position of the 1-shaped lever arm and the geometric center position of the long side lever arm of the 7-shaped lever arm. The 7-shaped lever arm and the 1-shaped lever arm are hinged by the hinge bolt through the through hole. The hollow part of the 7-shaped lever arm forms a through slot 1 (1-4), a through slot 2 (1-5) and a through slot 3 (1-6). ) and a through slot three (1-6), the hollow portion of the I-shaped lever arm forms a through slot four (1-7) and a through slot five (1-8), the through slot one, through slot two, through slot three, through slot four and through slot five can all pass through the rim bolt (2-2) and the dynamometer lever arm bolt (2-4), the rim bolt passes through the through slot two or the through slot three or the through slot four or the through slot five and is fixed by installing a matching rim nut (2-1), and the dynamometer lever arm bolt passes through the through slot one or the through slot two or the through slot three or the through slot four or the through slot five and is fixed by installing a matching dynamometer lever arm nut (2-3).

2. The transmission device for automobile hub motor performance testing according to claim 1, characterized in that: There are four or five rim bolts, and the distribution radius of the rim bolts is any size that does not exceed the length of the 7-shaped lever arm or the 1-shaped lever arm; there are two dynamometer arm bolts, and the two dynamometer arm bolts are simultaneously arranged on the 7-shaped lever arm or the 1-shaped lever arm, and the spacing between the two dynamometer arm bolts is any size that does not exceed the length of the 7-shaped lever arm or the 1-shaped lever arm.

3. The transmission device for automobile hub motor performance testing according to claim 1, characterized in that: The long side arm and the short side arm of the 7-shaped arm are perpendicular to each other or form angles of other sizes.

4. The transmission device for testing the performance of an automobile hub motor according to claim 1, characterized in that: The angle between the 7-shaped lever arm and the 1-shaped lever arm can be adjusted to any size through a hinge bolt.

5. The transmission device for automobile hub motor performance testing according to claim 1, characterized in that: The rim bolt passes through the second through slot, the third through slot, the fourth through slot, or the fifth through slot, and then a matching rim nut is installed to fix the transmission device to the hub motor (2-5); the dynamometer arm bolt passes through the first through slot, the second through slot, the third through slot, the fourth through slot, or the fifth through slot, and then a matching dynamometer arm nut is installed to fix the transmission device to the dynamometer transmission arm (2-7) of the dynamometer (2-6).

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