Test bench for new energy heavy truck electric drive bridge vibration test

Abstract

The utility model belongs to the field of vibration tests, and particularly relates to a test bench for new energy heavy truck electric drive bridge vibration tests, which comprises a base, the edge of the upper end of the base is fixedly connected with four uniformly distributed hollow sleeves, the interior of each hollow sleeve is slidably connected with a sliding column, and the sliding columns penetrate through the hollow sleeves. The top of the sliding column is fixedly connected with a shell, a polarization mechanism is arranged in the shell, and the bottom of the shell is fixedly connected with an inclined plane seat. According to the utility model, the motor I drives the special-shaped rod to be matched with the inclined plane seat to generate main vibration, and the motor II in the polarization mechanism drives the eccentric wheel to excite high-frequency micro-vibration, so that a wide-frequency-domain composite vibration environment is formed, a complex vibration spectrum in an actual working condition of an electric drive axle can be accurately simulated, and the accuracy of a vibration test result is improved.

Description

Technical Field

[0001] This utility model relates to the field of vibration testing technology, specifically a test bench for vibration testing of electric drive axles of new energy heavy trucks. Background Technology

[0002] The electric drive axle of new energy heavy trucks is subjected to complex vibration loads during operation, so it is necessary to conduct relevant vibration tests on it.

[0003] A search revealed a utility model patent with patent authorization announcement number CN117538003B, which discloses a motor vibration test bench, including a base plate, a vibration test bench, a feeding and lifting mechanism, a pushing mechanism, and a fixing mechanism. A control mechanism is installed on the upper end of the base plate, and the vibration test bench is set on the left side of the control mechanism and fixed on the upper end of the base plate. A matching mechanism is installed on the upper left rear part of the vibration test bench, and a positioning mechanism is installed on the upper end of the vibration test bench. The feeding and lifting mechanism is set on the left side of the vibration test bench.

[0004] Traditional vibration test benches typically use a single excitation source, which makes it difficult to simulate the complex vibration spectrum in actual working conditions. Furthermore, long-term vibration testing can easily lead to mechanical wear and high noise levels. Utility Model Content

[0005] The purpose of this utility model is to provide a test bench for vibration testing of electric drive axles of new energy heavy trucks. It solves the problem that traditional vibration test benches usually use a single excitation source, which makes it difficult to simulate the composite vibration spectrum in actual working conditions. At the same time, it solves the problem that long-term vibration testing can easily lead to mechanical wear and high noise.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a test bench for vibration testing of electric drive axles of new energy heavy trucks, comprising a base, four evenly distributed hollow sleeves fixedly connected to the upper edge of the base, each hollow sleeve having a sliding column slidably connected inside, the sliding column penetrating the hollow sleeve, a housing fixedly connected to the top of the sliding column, a polarization mechanism being provided inside the housing, an inclined seat fixedly connected to the bottom of the housing, a motor being fixedly installed in the upper middle of the base, an irregularly shaped rod being fixedly connected to the end of the output shaft of the motor, the irregularly shaped rod abutting against the inclined seat, a spring being sleeved on the outer sides of the hollow sleeves and the sliding columns, one end of the spring being fixedly connected to the base, and the other end of the spring being fixedly connected to the housing.

[0007] Preferably, an auxiliary seat is fixedly connected to the upper end of the base, and a rubber pad is fixedly connected to the top of the auxiliary seat, with the rubber pad contacting the housing. The auxiliary seat provides auxiliary support for the housing and its components, reducing the stress on the motor.

[0008] Preferably, a support plate is fixedly connected to the inner side of the hollow sleeve, and a sponge block is placed on the upper end of the support plate. The sponge block is slidably connected inside the hollow sleeve, and it abuts against the sliding column. A through hole is provided at the top of the hollow sleeve. After the sliding column resets, it impacts the sponge block, thereby squeezing out the lubricating oil inside the sponge block and splashing it through the through hole. This oil then enters the sliding area between the sliding column and the hollow sleeve, reducing wear on both and thus reducing noise during vibration testing.

[0009] Preferably, a retaining ring is fixedly connected to the column body of the sliding column, and a corrugated sleeve is fixedly connected to the bottom of the retaining ring, with the corrugated sleeve being fixedly connected to the hollow sleeve. The retaining ring and corrugated sleeve prevent lubricant leakage.

[0010] Preferably, the polarization mechanism includes a pad with two mounting posts welded to its upper end. A guide frame is fixedly connected to the bottom of the pad, and a guide sleeve is fixedly connected to the inner wall of the housing. The guide sleeve is slidably connected to the guide frame. A circular sleeve is fixedly connected to the bottom of the pad, and a second motor is fixedly mounted on the inner bottom of the housing. An eccentric wheel is fixedly connected to the end of the output shaft of the second motor, and the eccentric wheel abuts against the inner wall of the circular sleeve. By setting up the polarization mechanism, the vibration detection results of the electric drive bridge can be improved.

[0011] Preferably, a second spring is provided inside the guide sleeve. One end of the second spring is fixedly connected to the guide frame, and the other end of the second spring is fixedly connected to the inner surface of the guide sleeve. The second spring allows the elastic force to be applied back to the pad through the guide frame.

[0012] Preferably, the bottom of the sleeve is provided with ball bearings, which contact the inner bottom of the housing. The ball bearings reduce the friction between the sleeve and the housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses an electric motor to drive a shaped rod to cooperate with an inclined seat to generate the main vibration. At the same time, an electric motor in the polarization mechanism drives an eccentric wheel to excite high-frequency micro-vibration, forming a wide-frequency domain composite vibration environment. This can accurately simulate the complex vibration spectrum in the actual working conditions of the electric drive bridge and improve the accuracy of vibration test results.

[0015] 2. This utility model innovatively converts vibration energy into lubrication power. When the slide column reciprocates, it impacts the sponge block, causing the stored lubricating oil to splash precisely through the through hole onto the contact surface between the slide column and the hollow sleeve, reducing wear and noise between the two. Moreover, the unique corrugated sleeve sealing structure, together with the retaining ring, forms a labyrinth-type sealing cavity, which allows for large stroke movement of the slide column while ensuring the closed-loop circulation of lubricating oil and preventing leakage. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of a partial structure;

[0018] Figure 3 This utility model Figure 1 A front sectional view;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A.

[0020] In the diagram: 1. Base; 2. Hollow sleeve; 3. Sliding column; 4. Housing; 5. Polarization mechanism; 6. Inclined seat; 7. Motor 1; 8. Irregular rod; 9. Auxiliary seat; 10. Rubber pad; 11. Spring 1; 12. Support plate; 13. Sponge block; 14. Retaining ring; 15. Corrugated sleeve; 16. Through hole; 51. Pad plate; 52. Mounting column; 53. Guide frame; 54. Guide sleeve; 55. Spring 2; 56. Circular sleeve; 57. Ball bearing; 58. Motor 2; 59. Eccentric wheel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 A test bench for vibration testing of electric drive axles of new energy heavy trucks includes a base 1. Four evenly distributed hollow sleeves 2 are fixedly connected to the upper edge of the base 1. Each hollow sleeve 2 has a sliding column 3 slidably connected inside, and the sliding column 3 passes through the hollow sleeve 2. A housing 4 is fixedly connected to the top of the sliding column 3. An inclined seat 6 is fixedly connected to the bottom of the housing 4. A motor 7 is fixedly installed in the middle of the upper end of the base 1. A shaped rod 8 is fixedly connected to the end of the output shaft of the motor 7. The shaped rod 8 abuts against the inclined seat 6. A spring 11 is sleeved on the outer side of the hollow sleeves 2 and the sliding column 3. One end of the spring 11 is fixedly connected to the base 1, and the other end of the spring 11 is fixedly connected to the housing 4.

[0023] Please see Figures 1-4An auxiliary seat 9 is fixedly connected to the upper end of the base 1, and a rubber pad 10 is fixedly connected to the top of the auxiliary seat 9. The rubber pad 10 abuts against the housing 4. The auxiliary seat 9 provides auxiliary support for the housing 4 and the components on the housing 4, reducing the stress on the motor 7. A support plate 12 is fixedly connected to the inner side of the hollow sleeve 2. A sponge block 13 is placed on the upper end of the support plate 12 and is slidably connected inside the hollow sleeve 2. The sponge block 13 abuts against the sliding column 3. A through hole 16 is opened at the top of the hollow sleeve 2. After the sliding column 3 is reset, it will impact the sponge block 13, thereby squeezing out the lubricating oil in the sponge block 13 and splashing it through the through hole 16. Then it is added to the relative sliding point between the sliding column 3 and the hollow sleeve 2, reducing wear between the two and thus reducing noise during vibration testing. A retaining ring 14 is fixedly connected to the column of the sliding column 3. A corrugated sleeve 15 is fixedly connected to the bottom of the retaining ring 14 and is fixedly connected to the hollow sleeve 2. The use of retaining ring 14 and corrugated sleeve 15 can prevent lubricating oil leakage.

[0024] Please see Figure 1 , Figure 3 A polarization mechanism 5 is installed inside the housing 4. This mechanism enhances the vibration detection results of the electric drive bridge. The polarization mechanism 5 includes a pad 51 with two mounting posts 52 welded to its upper end. A guide frame 53 is fixedly connected to the bottom of the pad 51. A guide sleeve 54 is fixedly connected to the inner wall of the housing 4, and the guide sleeve 54 is slidably connected to the guide frame 53. A circular sleeve 56 is fixedly connected to the bottom of the pad 51. A second motor 58 is fixedly installed on the inner bottom of the housing 4. An eccentric wheel 59 is fixedly connected to the end of the output shaft of the second motor 58, and the eccentric wheel 59 abuts against the inner wall of the circular sleeve 56. A second spring 55 is installed inside the guide sleeve 54. One end of the second spring 55 is fixedly connected to the guide frame 53, and the other end is fixedly connected to the inner surface of the guide sleeve 54. The second spring 55 allows the elastic force to be applied back to the pad 51 through the guide frame 53. A ball bearing 57 is installed at the bottom of the circular sleeve 56, and the ball bearing 57 contacts the inner bottom of the housing 4. By setting the ball bearing 57, the friction between the sleeve 56 and the housing 4 can be reduced.

[0025] The specific implementation process of this utility model is as follows: In use, the electric drive bridge to be tested is installed at the mounting post 52. Then, the motor 7 drives the shaped rod 8 to rotate. The shaped rod 8, through cooperation with the inclined seat 6 and the spring 11, can make the housing 4 and the electric drive bridge on the housing 4 generate main vibration. At the same time, the motor 58 in the polarization mechanism 5 drives the eccentric wheel 59 to excite high-frequency micro-vibration, forming a wide-frequency domain composite vibration environment, which can accurately simulate the complex vibration spectrum in the actual working condition of the electric drive bridge and improve the accuracy of vibration test results. In addition, during the lifting and lowering process of the housing 4, the hollow sleeve 2 and the sliding column 3 provide guidance. Moreover, when the sliding column 3 reciprocates, it impacts the sponge block 13, causing the stored lubricating oil to splash accurately through the through hole 16 to the contact surface between the sliding column 3 and the hollow sleeve 2, reducing wear and noise between the two. In addition, the unique corrugated sleeve 15 sealing structure, together with the retaining ring 14, forms a labyrinth-type sealed cavity, which allows the sliding column 3 to move in a large stroke while ensuring that the lubricating oil is used in a closed loop and is not prone to leakage.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test bench for vibration testing of electric drive axles in new energy heavy-duty trucks, comprising a base (1), characterized in that: The upper edge of the base (1) is fixedly connected to four evenly distributed hollow sleeves (2). Each hollow sleeve (2) is slidably connected to a sliding column (3), and the sliding column (3) passes through the hollow sleeve (2). The top of the sliding column (3) is fixedly connected to a housing (4). A polarization mechanism (5) is provided inside the housing (4). The bottom of the housing (4) is fixedly connected to a sloping seat (6). The upper middle part of the base (1) is fixedly installed with a motor (7). The output shaft end of the motor (7) is fixedly connected to a shaped rod (8). The shaped rod (8) abuts against the sloping seat (6). The outer sides of the hollow sleeves (2) and the sliding column (3) are jointly fitted with a spring (11). One end of the spring (11) is fixedly connected to the base (1), and the other end of the spring (11) is fixedly connected to the housing (4).

2. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 1, characterized in that: An auxiliary seat (9) is fixedly connected to the upper end of the base (1), and a rubber pad (10) is fixedly connected to the top of the auxiliary seat (9). The rubber pad (10) abuts against the shell (4).

3. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 1, characterized in that: A support plate (12) is fixedly connected to the inner side of the hollow sleeve (2). A sponge block (13) is placed on the upper end of the support plate (12), and the sponge block (13) is slidably connected to the inside of the hollow sleeve (2). The sponge block (13) abuts against the sliding column (3). A through hole (16) is opened on the top of the hollow sleeve (2).

4. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 3, characterized in that: A retaining ring (14) is fixedly connected to the column of the sliding column (3), and a corrugated sleeve (15) is fixedly connected to the bottom of the retaining ring (14), and the corrugated sleeve (15) is fixedly connected to the hollow sleeve (2).

5. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 1, characterized in that: The polarization mechanism (5) includes a pad (51), with two mounting posts (52) welded to the upper end of the pad (51). A guide frame (53) is fixedly connected to the bottom of the pad (51). A guide sleeve (54) is fixedly connected to the inner wall of the housing (4). The guide sleeve (54) is slidably connected to the guide frame (53). A circular sleeve (56) is fixedly connected to the bottom of the pad (51). A second motor (58) is fixedly installed on the inner bottom of the housing (4). An eccentric wheel (59) is fixedly connected to the end of the output shaft of the second motor (58). The eccentric wheel (59) abuts against the inner wall of the circular sleeve (56).

6. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 5, characterized in that: The guide sleeve (54) is provided with a second spring (55). One end of the second spring (55) is fixedly connected to the guide frame (53), and the other end of the second spring (55) is fixedly connected to the inner surface of the guide sleeve (54).

7. The test bench for vibration testing of electric drive axles in new energy heavy-duty trucks according to claim 5, characterized in that: The bottom of the sleeve (56) is provided with a ball (57), which contacts the bottom inner side of the housing (4).

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