Transmission device for automobile hub motor performance test

Abstract

The invention relates to a transmission device for testing the performance of an automobile hub motor, and the transmission device 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 a through hole is arranged in the through hole. 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 invention 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 automotive hub motors is becoming more and more widespread. A hub motor refers to a motor that can not only provide power but also act as a hub. The tire is installed on the outer edge of the motor, so it can significantly save chassis space and reduce chassis weight. After the design and production of the hub motor is completed, the hub motor must be tested for performance such as torque, speed, and power. Usually, such tests require the use of a dynamometer. When using a dynamometer to test the performance of a motor, a common practice is to design a transmission device to connect the rim bolts on the hub motor with the transmission arm of the dynamometer so that the dynamometer and the motor to be tested can be stably and reliably connected. However, there are usually 4 or 5 rim bolts on the hub motor, and the rim bolt distribution radius is different. Therefore, different transmission devices are usually required for different motors. This brings higher manufacturing costs and manufacturing cycles. Therefore, it is necessary to design a transmission device for automotive hub motor performance testing to enable the dynamometer and different types of hub motors to be stably and reliably transmitted. Summary of the invention

[0003] In view of the above problems, the present invention provides a transmission device for automobile hub motor performance testing which has a simple structure, is easy to manufacture, satisfies the requirement of stable and reliable connection between a dynamometer and a 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: 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 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, and the 7-shaped lever arm and the 1-shaped lever arm are connected by hinge bolts through the through hole After the hinge is completed, the hollow part of the 7-shaped lever arm forms through slots 1, 2 and 3, and the hollow part of the 1-shaped lever arm forms through slots 4 and 5. The through slots 1, 2, 3, 4 and 5 can all pass through the rim bolts and the dynamometer lever arm bolts. After the rim bolts pass through through slots 2, 3, 4 or 5, they are fixed by installing matching rim nuts. After the dynamometer lever arm bolts pass through through slots 1, 2, 3, 4 or 5, they are fixed by installing matching dynamometer lever arm nuts.

[0005] Preferably, the number of the rim bolts is four or five, 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; the number of the dynamometer arm bolts is two, 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 means of a hinge bolt.

[0008] Preferably, the rim bolt passes through slot two, slot three, slot four or slot five, and then the transmission device is fixed to the hub motor by installing a matching rim nut, and the dynamometer arm bolt passes through slot one, slot two, slot three, slot four or slot five, and then the transmission device is fixed 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 designs two hinged hollow power transmission arms, and the hinged design allows the angle of the two hollow power transmission arms to be freely adjusted, so as to be applicable to a hub motor with four rim bolts or a hub motor with five rim bolts, thereby improving the versatility of the device;

[0011] 2. The present invention designs two hinged hollow transmission arms, and 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 present invention 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 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the connection between the present invention and an embodiment of a hub motor (four wheel rim bolts);

[0015] Figure 3 It is a schematic diagram of the connection between the present invention and another embodiment of the wheel hub motor (five wheel rim bolts);

[0016] Figure 4 It is a schematic diagram of the overall connection between the present invention, 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 present invention comprises a 7-shaped lever arm 1-1, a 1-shaped lever arm 1-2 and an articulated bolt 1-3 for connecting the two lever arms, and the 7-shaped lever arm and the 1-shaped lever arm are both hollow transmission force arms, the 7-shaped lever arm comprises 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 articulated by the articulated 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 articulated bolt, and the hollow part of the 7-shaped lever arm forms a through groove. 1-4, through slot two 1-5 and through slot three 1-6, the hollow part of the 1-shaped force arm forms through slot four 1-7 and through slot five 1-8, 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 force arm bolt 2-4, the rim bolt passes through through slot two or through slot three or through slot four or through slot five, and then fixes the transmission device to the hub motor 2-5 through the matching rim nut 2-1, the hub motor is provided with a main shaft 2-8, the dynamometer force arm bolt passes through through slot one or through slot two or through slot three or through slot four or through slot five, and then fixes the transmission device 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 not exceeding the length of the 7-shaped lever arm or the 1-shaped lever arm; there are two dynamometer lever arm bolts, and in the present invention, the two dynamometer lever arm bolts are simultaneously arranged on the 7-shaped lever arm or the 1-shaped lever arm, and the spacing between the two dynamometer lever arm bolts is any size not exceeding 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 the number of rim bolts on the hub motor is four, the four rim bolts pass through through slot two, through slot three, through slot four and through slot five 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 make the rim bolt tightly connected with through slot two, through slot three, through slot four and through slot five. Pass two dynamometer lever arm bolts through through slot two and through slot three or through slot four and through slot five, and tighten the dynamometer lever arm nut to make the dynamometer lever arm bolt tightly connected with through slot two and through slot three, or through slot four and through slot five, 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 through slot two, through slot three, through slot four and through slot five respectively. At this time, the angle between the 7-shaped lever arm and the 1-shaped lever arm is adjusted with the different distribution radius of the five rim bolts. When the distribution radius of the five rim bolts is a certain size, loosen the hinge bolt, first pass any two non-adjacent rim bolts of the hub motor through through slot four and through slot five on the 1-shaped lever arm, and then rotate the 7-shaped lever arm until two non-adjacent two of the remaining three rim bolts of the motor to be tested pass through through slot two and through slot three, tighten the rim nut to make the rim bolt tightly connected with through slot two, through slot three, through slot four and through slot five, pass two dynamometer lever arm bolts through through slot one and through slot three, and tighten the dynamometer lever arm nut to make the dynamometer lever arm bolt tightly connected with through slot one and through slot three, 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 grooves 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 technical solutions provided by the embodiments of the present invention are introduced in detail above. 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 will be changes in the specific implementation methods and application scopes. In summary, the content 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 in that: The invention comprises a 7-shaped lever arm (1-1), a 1-shaped lever arm (1-2) and an articulated bolt (1-3) for connecting the two lever arms, wherein 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 articulated by the articulated bolt through the through hole, and 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 part 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, through slot three, through slot four or 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, through slot two, through slot three, through slot four or through slot five and is fixed by installing a matching dynamometer lever arm nut (2-3).

2. The transmission device for testing the performance of an automobile hub motor 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 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.

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

5. The transmission device for automobile hub motor performance testing according to claim 1 is 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 fixes the transmission device to the hub motor (2-5) by installing a matching rim nut; 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 fixes the transmission device to the dynamometer transmission arm (2-7) of the dynamometer (2-6) by installing a matching dynamometer arm nut.

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