Endurance testing device of motor

Abstract

The utility model provides a durability testing device for a motor, which belongs to the technical field of motor performance testing and is provided with a base, the left end of the base is fixedly provided with two support plates A which are arranged front and back, the left end of each support plate A is provided with a support plate B which is in mirror image arrangement with the support plate A, and the support plates A and the support plates B are provided with through holes which are arranged in a penetrating manner; a transmission wheel is rotationally connected between the supporting plate A and the supporting plate B. A motor is installed on the right wall of the supporting plate A through a flange plate, and a rotor shaft of the motor extends leftwards and is in transmission connection with the transmission wheel. The transmission wheel and the conveying belt are used for replacing a coupler, and the technical problem that an existing coupler connecting mode can be damaged in a long-term test in a high-vibration environment is solved.

Description

Technical Field

[0001] This utility model belongs to the field of motor performance testing technology, and more specifically, relates to a motor durability testing device. Background Technology

[0002] Pure electric vehicles have received unprecedented development opportunities. Electric vehicles need to have characteristics such as low noise and low pollution. As the core drive component of electric vehicles, the lifespan of permanent magnet synchronous motors determines the reliability and durability of the entire vehicle. A motor durability test will basically run for more than 500 hours. Long-term operation may cause some tooling parts to be damaged frequently, resulting in high test costs.

[0003] Existing motor durability testing fixtures are basically installed using couplings. Couplings are components that connect two shafts or a shaft and a rotating part, transmitting motion and power. The utility model application (application number: CN202023254447.1, announcement number: CN214310800U) provides a load-bearing testing fixture for permanent magnet synchronous motors. This fixture is used to test the permanent magnet synchronous motor under test. The fixture includes a tooling permanent magnet synchronous motor, and the permanent magnet synchronous motor under test is connected to a power source via a power line. The output end of the permanent magnet synchronous motor under test is connected to the tooling permanent magnet synchronous motor via a coupling.

[0004] Couplings are a type of flexible connection structure. Because the drive motors of new energy vehicles undergo frequent load changes during endurance testing and operate in a high-vibration environment, long-term endurance testing can easily damage the couplings. Furthermore, couplings that can withstand high speeds and high torques are relatively expensive. Utility Model Content

[0005] In view of this, the present invention provides a motor durability testing device to solve the technical problem that existing coupling connection methods will be damaged during long-term testing under high vibration environment.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a durability testing device for an electric motor, which has a base. Two support plates A arranged in a front-to-back pattern are fixedly installed on the left end of the base. Support plates A are provided on the left end of the base, and support plates B are arranged in a mirror image. Through holes are provided on both support plates A and support plates B.

[0008] A drive wheel is provided between the support plate A and the support plate B for rotational connection. A motor is installed on the right wall of the support plate A through a flange. The rotor of the motor extends to the left and is connected to the drive wheel for transmission.

[0009] Based on the above technical solution, the durability testing device for an electric motor of this utility model can be further improved as follows:

[0010] Furthermore, a conveyor belt is connected to both of the two drive wheels for transmission. One end of the shaft ring of a thrust bearing, which is coaxially arranged with the through hole, is fixedly installed on both support plate A and support plate B. One end of the seat ring of the thrust bearing is fixedly installed on the end face of the drive wheel.

[0011] Furthermore, a pressure roller is provided directly above the conveyor belt at the longitudinal center of the two drive wheels. Both ends of the pressure roller are rotatably connected to a U-shaped frame, which is vertically slidably connected relative to the support plate A.

[0012] Furthermore, a top plate is fixedly installed between the support plate A and the support plate B, and a telescopic cylinder is fixedly installed on the bottom wall of the top plate. The output axis of the telescopic cylinder extends downward and its end is fixedly connected to the middle of the U-shaped frame.

[0013] Furthermore, the transmission wheel is provided with multiple through-hole weight-reducing slots at equal intervals, and each weight-reducing slot is fitted with a configuration block.

[0014] Furthermore, multiple snap-fit ​​slots are equidistantly provided on the circumferential surface of the weight-reducing groove, and multiple snap-fit ​​blocks are fixedly installed equidistantly on the circumferential surface of the configuration block, with the snap-fit ​​slots inserted into the corresponding snap-fit ​​blocks.

[0015] Compared with the prior art, the beneficial effects of the motor durability testing device provided by this utility model are:

[0016] By replacing couplings with drive wheels and conveyor belts, the problems of easy damage and high cost of couplings are avoided, and the tooling footprint is reduced.

[0017] By setting up a thrust bearing, the transmission wheel can rotate in place relative to support plates A and B. Support plates A and B are located on both sides of the transmission wheel, making the transmission wheel more stable during rotation. Compared with ordinary bearings, the thrust bearing does not affect the connection between the transmission wheel and the rotor shaft.

[0018] By setting up structures such as configuration blocks, the counterweight of the transmission wheel can be adjusted, thereby adjusting the weight on the rotor shaft. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a side view of the overall structure;

[0021] Figure 2 Isometric drawings of the transmission wheel and rotor shaft;

[0022] Figure 3 This is the overall front view of the transmission wheel;

[0023] Figure 4 for Figure 1 Enlarged view at point A;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Base; 11. Support plate A; 12. Support plate B; 13. Through hole; 14. Thrust bearing; 2. Conveyor belt; 21. Drive wheel; 22. Top plate; 23. Telescopic cylinder; 24. Pressure roller; 25. U-shaped frame; 3. Motor; 31. Flange; 32. Rotor shaft; 41. Weight reduction groove; 42. Snap-fit ​​groove; 43. Configuration block; 44. Snap-fit ​​block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example 1

[0032] like Figure 1-4 As shown, this utility model provides a durability testing device for an electric motor, which has a base 1. Two support plates A11 arranged in a front-to-back manner are fixedly installed on the left end of the base 1. Support plates A11 are provided with a support plate B12 mirrored on the left end of each support plate A11 and support plate B12. Through holes 13 are provided on both support plates A11 and support plates B12.

[0033] A drive wheel 21 is provided between support plate A11 and support plate B12 for rotatable connection. A motor 3 is installed on the right wall of support plate A11 through flange 31. The rotor shaft 32 of the motor 3 extends to the left and is connected to the drive wheel 21 for transmission.

[0034] Optionally, in the above technical solution, the two transmission wheels 21 are connected to the transmission belt 2 for transmission. One end of the shaft ring of the thrust bearing 14, which is coaxially arranged with the through hole 13, is fixedly installed on both the support plate A11 and the support plate B12. One end of the seat ring of the thrust bearing 14 is fixedly installed on the end face of the transmission wheel 21.

[0035] Optionally, in the above technical solution, a pressure roller 24 is provided directly above the conveyor belt 2, located in the longitudinal middle of the two drive wheels 21. Both ends of the pressure roller 24 are rotatably connected to the U-shaped frame 25, and the U-shaped frame 25 is vertically slidably connected to the support plate A11.

[0036] Optionally, in the above technical solution, a top plate 22 is fixedly installed between support plate A11 and support plate B12, and a telescopic cylinder 23 is fixedly installed on the bottom wall of the top plate 22. The output shaft of the telescopic cylinder 23 extends downward and its end is fixedly connected to the middle of the U-shaped frame 25.

[0037] The top plate 22 is a square structure, with its four corners fixedly installed at the rear ends of the front support plate A11 and support plate B12, and at the front ends of the rear support plate A11 and support plate B12, respectively.

[0038] Optionally, in the above technical solution, the transmission wheel 21 is provided with a plurality of through-hole weight-reducing grooves 41 at equal intervals, and each weight-reducing groove 41 is inserted with a configuration block 43.

[0039] Optionally, in the above technical solution, multiple snap-fit ​​slots 42 are equidistantly provided on the circumferential surface of the weight reduction slot 41, and multiple snap-fit ​​blocks 44 are equidistantly fixedly installed on the circumferential surface of the configuration block 43, with the snap-fit ​​slots 42 inserted into the corresponding snap-fit ​​blocks 44.

[0040] Furthermore, the rotor shaft of the motor 3 is an external spline or an internal spline, and the through hole in the middle of the transmission wheel 21 is an internal spline or an external spline; wherein, the transmission wheel 21 can be a gear or a pulley, and the transmission belt 2 can be a toothed belt (compatible with the gear) or a belt (compatible with the pulley); preferably, the transmission wheel 21 adopts a structure with outer teeth similar to straight teeth. This structure is convenient for processing using wire cutting technology. After processing using wire cutting technology, heat treatment can ensure strength, and the processing cost is low.

[0041] Furthermore, the front motor 3 is a load motor and adopts torque control mode, while the rear motor 3 is a drive motor and adopts speed control mode. When the motor 3 is operating under a certain working condition, it is only necessary to adjust the output torque of the front motor 3 and adjust the output speed of the rear motor 3. Among them, the motor 3 is controlled by the controller and the host computer, and the two motors 3 must ensure that the rotation direction is consistent.

[0042] Among them, flange 31 is connected by bolts and positioned by a stop.

[0043] The transmission wheel 21 has a certain distance between its two sides and the support plate A11 and support plate B12, which facilitates the installation or removal of the configuration block 43.

[0044] The inner diameter of the thrust bearing 14 is larger than the diameter of the through hole 13. The diameter of the through hole 13 is large enough for the rotor shaft of the motor 3 to pass through. The thrust bearing 14 causes the transmission wheel 21 to rotate in place relative to the support plate A11 and the support plate B12.

[0045] The through hole 13, thrust bearing 14, transmission wheel 21, and rotor shaft 32 are coaxially arranged.

[0046] Preferably, the number of weight-reducing grooves 41 on a single drive wheel 21 is even, so that the locking blocks 44 can be symmetrically distributed on the drive wheel 21.

[0047] In use, the motor 3 to be tested is installed on the support plate A11 through the flange 31, and the rotor shaft 32 of the motor 3 is inserted into the transmission wheel 21 and connected to the transmission wheel 21 through a spline structure, so that the transmission wheel 21 rotates with the rotor shaft 32 through the thrust bearing 14.

[0048] The height of the pressure roller 24 can be adjusted by moving the U-shaped frame 25 up and down through the telescopic cylinder 23. The lower the height of the pressure roller 24, the greater the pressure applied to the conveyor belt 2.

[0049] The weight of the entire transmission wheel 21 can be adjusted by the number of configuration blocks 43 inserted on the transmission wheel 21, thereby adjusting the counterweight of the rotor shaft 32. (When configuration blocks 43 are inserted on some of the weight reduction slots 41 and configuration blocks 43 are not inserted on the rest of the weight reduction slots 41, the situation under unbalanced eccentric load can be tested; among them, the number of some weight reduction slots 41 is greater than the number of one weight reduction slot 41 but less than the number of all weight reduction slots 41.)

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A durability testing device for an electric motor, comprising a base (1), characterized in that, The left end of the base (1) is fixedly installed with two support plates A (11) arranged in front and behind. The left end of each support plate A (11) is provided with a support plate B (12) mirrored thereto. Both support plates A (11) and support plates B (12) are provided with through holes (13). A drive wheel (21) is provided between the support plate A (11) and the support plate B (12) for rotational connection. A motor (3) is installed on the right wall of the support plate A (11) through a flange (31). The rotor shaft (32) of the motor (3) extends to the left and is connected to the drive wheel (21) for transmission.

2. The durability testing device for an electric motor according to claim 1, characterized in that, The two drive wheels (21) are connected to a conveyor belt (2) for transmission. The support plate A (11) and the support plate B (12) are both fixedly installed with one end of the shaft ring of the thrust bearing (14) coaxially arranged with the through hole (13). The seat ring of the thrust bearing (14) is fixedly installed on the end face of the drive wheel (21).

3. The durability testing device for an electric motor according to claim 2, characterized in that, Above the conveyor belt (2) is a pressure roller (24) located in the longitudinal middle of the two drive wheels (21). Both ends of the pressure roller (24) are rotatably connected to the U-shaped frame (25), which is vertically slidably connected to the support plate A (11).

4. The durability testing device for an electric motor according to claim 3, characterized in that, A top plate (22) is fixedly installed between the support plate A (11) and the support plate B. A telescopic cylinder (23) is fixedly installed on the bottom wall of the top plate (22). The output axis of the telescopic cylinder (23) extends downward and its end is fixedly connected to the middle of the U-shaped frame (25).

5. The durability testing device for an electric motor according to claim 1, characterized in that, The transmission wheel (21) has multiple through-hole weight-reducing grooves (41) at equal intervals, and each weight-reducing groove (41) has a configuration block (43) inserted into it.

6. The durability testing device for an electric motor according to claim 5, characterized in that, The weight reduction groove (41) has multiple snap-fit ​​grooves (42) evenly spaced on its circumferential surface, and multiple snap-fit ​​blocks (44) are fixedly installed evenly spaced on the circumferential surface of the configuration block (43). The snap-fit ​​grooves (42) are inserted into the corresponding snap-fit ​​blocks (44).

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