CN217155781U

CN217155781U - Vibration clamp for ECU test of electric power steering system

Info

Publication number: CN217155781U
Application number: CN202122148139.9U
Authority: CN
Inventors: 黄详; 汪兵兵; 聂俊彦; 董阳; 陈煜宇; 赵豪杰; 顾越凡
Original assignee: Bosch Huayu Steering Systems Co Ltd
Current assignee: Bosch Huayu Steering Systems Co Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-08-09
Anticipated expiration: 2031-09-07

Abstract

The utility model belongs to the technical field of the test device technique and specifically relates to a vibrating fixture for electronic power steering system ECU is experimental, including anchor clamps body, bottom plate, the anchor clamps body includes four support walls, and the contained angle between two adjacent support walls is 90 degrees, and two face-to-face support walls are parallel to each other, are equipped with a recess on the surface of every support wall, and recess central authorities are equipped with a fixed hole site of electric motor rotor who runs through the support wall, and the bottom of anchor clamps body is equipped with the bottom plate. Compared with the prior art, the utility model, designed four vibration anchor clamps that support the wall, reduced the unstable vibration influence that causes because of resonance in vibration endurance test, can carry out X, Y two horizontal directions's vibration test simultaneously, improve vibration endurance test efficiency, reduced the load of other shaking tables.

Description

Vibration clamp for ECU test of electric power steering system

Technical Field

The utility model belongs to the technical field of the test device technique and specifically relates to a vibrating fixture for electronic power steering system ECU is experimental.

Background

The vibration endurance test is an important test item in the test of the electronic and electric parts of the automobile, and the main purpose of the vibration endurance test is to investigate the influence of the generated vibration on the electric continuous reliability of the electronic and electric parts of the automobile through the automobile body when the automobile is started and runs. In a vibration test, an electric power steering system ECU needs to be fixed on a vibration rack through a special tool clamp. Therefore, the structure of the tool holder for the vibration endurance test has a great influence on the result of the endurance test.

As shown in fig. 1, the existing L-shaped welding fixture is formed by welding a vertical metal plate 1 and a horizontal metal plate 5 through four triangular supporting blocks 2, a sample is fixed on the fixture through a motor rotor fixing hole 3 connected with an ECU and a groove 4 connected with the ECU, and the L-shaped welding fixture is fixed on the plane of a vibration table through a screw hole 6 for performing a vibration endurance test.

The welding L-shaped clamp has the following defects in the vibration endurance test: during the vibration endurance test, the natural frequency is low, and the resonance is easy to generate to influence the test result; during the experiment, only can test 3 samples, and the vibration direction of 3 samples is unanimous, can not test the different vibration direction of X direction and Y direction simultaneously, and efficiency of software testing is lower.

Therefore, a vibration clamp for an ECU test of an electric power steering system needs to be designed, so that a resonance problem is solved, vibration tests in the X direction and the Y direction are simultaneously performed, and the test efficiency is improved.

Disclosure of Invention

The utility model aims at overcoming prior art's not enough, providing a vibration anchor clamps for electric power steering system ECU is experimental, when solving the resonance problem, realize that X direction and Y direction carry out vibration test simultaneously, improve test efficiency.

In order to achieve the above object, the utility model provides a vibrating fixture for electronic power steering system ECU is experimental, including anchor clamps body, bottom plate, the anchor clamps body includes four support walls, and the contained angle between two adjacent support walls is 90 degrees, and two face-to-face support walls are parallel to each other, are equipped with a recess on the surface of every support wall, and recess central authorities are equipped with a fixed hole site of electric motor rotor who runs through the support wall, and the bottom of anchor clamps body is equipped with the bottom plate.

The bottom plate is uniformly provided with screw holes.

The screw passes through the screw hole and is connected with the plane of the vibration table frame.

The motor rotor fixing hole position is meshed with the test motor rotor.

The groove is matched with the outer plane of the test motor.

The four supporting walls are square.

Compared with the prior art, the utility model, designed four vibration anchor clamps that support the wall, reduced the unstable vibration influence that causes because of resonance in the vibration endurance test, can carry out X, Y two horizontal directions's vibration test simultaneously, improved vibration endurance test efficiency, reduced the load of other shaking tables.

Drawings

Fig. 1 is an isometric view of the prior art.

Fig. 2 is an axonometric view of the present invention.

Fig. 3 is a top view of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

Referring to fig. 2 and 3, the utility model provides a vibration anchor clamps for electric power steering system ECU is experimental, including anchor clamps body, bottom plate, anchor clamps body 7 includes four support walls, and the contained angle between two adjacent support walls is 90 degrees, and two face-to-face support walls are parallel to each other, and is preferred, and four support walls are square. A groove 4 is arranged on the outer surface of each supporting wall, a motor rotor fixing hole position 3 penetrating through the supporting wall is arranged in the center of each groove 4, and a bottom plate 8 is arranged at the bottom of the clamp body 7.

In the utility model, the screw holes 6 are evenly distributed on the bottom plate 8. The screw passes through the screw hole 6 and is connected with the plane of the vibration table frame.

The groove 4 is matched with the outer plane of the test motor. The design of the groove surface can support the sample piece and fix the position of the sample piece when the sample piece is installed and subjected to vibration test; the groove surface can be designed and adjusted according to different project product structures so as to be matched for carrying out vibration endurance tests.

The motor rotor fixing hole position 3 is meshed with a test motor rotor to prevent the motor rotor from rotating in a test so as to simulate the actual working condition of a motor connected with an ECU (electronic control unit) in an electric power steering system.

The utility model discloses at the during operation, to need experimental electric motor rotor insert four electric motor rotor fixed hole sites 3 respectively in, can realize X, Y two horizontal direction's vibration test simultaneously.

Simulation analysis by CAE rigid structure: the simulation result of the rigid structure of the welded L-shaped clamp shows that the natural frequency is 945.9Hz, is between the test frequency of international standard ISO 16750-3 and 10Hz-2000Hz, and is used in the vibration endurance test. The interference factors are generated by the extremely large resonant frequency, so that the accuracy of the test result is influenced. The utility model discloses a simulation result shows that natural frequency can reach 3430.9Hz, and the highest vibration endurance test frequency that is 2000Hz that requires among the international standard ISO 16750-3 far away has fine dynamic rigidity and stability and is difficult for taking place resonance in the testing process.

The square-shaped structure formed by the four supporting walls can realize X, Y vibration tests in two horizontal directions, improve the vibration endurance test efficiency and reduce the loads of other vibration racks; compared with a welded L-shaped clamp, the integrated square-shaped structure is more stable, and the unstable vibration influence caused by resonance in a vibration endurance test is reduced.

Claims

1. The utility model provides a vibration anchor clamps for electric power steering system ECU is experimental, includes anchor clamps body, bottom plate, its characterized in that: the fixture body (7) comprises four supporting walls, the included angle between every two adjacent supporting walls is 90 degrees, the two supporting walls which are face to face are parallel to each other, a groove (4) is formed in the outer surface of each supporting wall, a motor rotor fixing hole position (3) which penetrates through the supporting walls is arranged in the center of each groove (4), and a bottom plate (8) is arranged at the bottom of the fixture body (7).

2. The vibrating clamp for the ECU test of the electric power steering system according to claim 1, characterized in that: the bottom plate (8) is uniformly distributed with screw holes (6).

3. The vibrating clamp for the ECU test of the electric power steering system according to claim 2, characterized in that: the screw passes through the screw hole (6) and is connected with the plane of the vibration table frame.

4. The vibrating clamp for the ECU test of the electric power steering system according to claim 1, characterized in that: the motor rotor fixing hole position (3) is meshed with the test motor rotor.

5. The vibrating clamp for the ECU test of the electric power steering system according to claim 1, characterized in that: the groove (4) is matched with the outer plane of the test motor.

6. The vibrating clamp for the ECU test of the electric power steering system according to claim 1, characterized in that: the four supporting walls are square.