A sound insulation mechanism for vibration detection of automobile parts
By designing a vibration detection sound insulation mechanism for automotive parts, using shock absorbing pads, liquid dynamic and static pressure support and ultrasonic atomization nozzles, the detection problems in the humidity and vibration environment in the existing technology are solved, and high-precision vibration detection and Real environment simulation.
Patent Information
- Application Number
- CN202111343912.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-14
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2041-11-14
AI Technical Summary
The prior art is difficult to accurately detect the vibration of automotive parts under humidity and vibration environments, with low detection accuracy and difficult to simulate the real working environment of parts.
Design a vibration detection sound insulation mechanism for automobile parts including a rectangular shell-shaped box, using shock absorbing pads, liquid dynamic and static pressure support spindles and ultrasonic atomization nozzles, and quickly establish a test environment in combination with the environmental bin, improve detection accuracy and simulate Real working conditions.
High-precision vibration detection in humidity and vibration environments is achieved, the data is closer to actual use, and the detection accuracy is higher than that of traditional lead screw guide rail workbenches.
Smart Images
Figure CN114623993B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a sound insulation mechanism for vibration detection of automobile parts. Background Art
[0002] Cars are an important means of transportation in people's daily lives. The parts on a car will be impacted during driving, especially by vibration. Therefore, it is necessary to perform vibration tests on car parts. At present, vibration benches are used for car testing in production, and the parts are mounted on the tooling board of the vibration bench for testing. The working environment of automobile parts often has a certain humidity and experiences high and low temperature cross-changes, accompanied by vibration during driving. Vibration detection in this situation is difficult. Summary of the invention
[0003] The purpose of the present invention is to overcome the defects existing in the prior art and provide a sound insulation mechanism for vibration detection of automobile parts. When used in conjunction with an environmental chamber, vibration testing of automobile parts can be conveniently performed. The combination of air vents and plugs can quickly achieve the required testing environment. Compared with the detection mechanism of a traditional screw guide rail workbench, the present invention has higher detection accuracy.
[0004] To achieve the above purpose, the technical solution of the present invention is to design a sound insulation mechanism for vibration detection of automobile parts, including a box body in the shape of a rectangular shell, the box body includes a top plate and a bottom plate, a shock-absorbing pad is provided below the top plate and above the bottom plate, the box body is provided with an air vent connected to the environmental chamber, and a plug for closing the inner cavity of the box body is provided at the air vent; the box body is provided with a part to be tested and a fixture for clamping the part to be tested, and the box body is also provided with an acceleration sensor for vibration detection. The shock-absorbing pad is used to isolate the vibration of the spindle motor, and the acceleration sensor has a range of 50g and a sensitivity of 100mV / g. When used in conjunction with an environmental chamber, vibration tests on automotive parts can be easily performed. The coordination of the air vent and the plug can quickly achieve the required test environment. The present invention loads an axial load on one end of the screw, and the vibration sensor is fixed on the screw or on the nut. The vibration of the screw in three directions or the vibration of the nut can be measured. Since the vibration sensor is fixed on the linear motion element of the roller screw assembly, it is not constrained by other guiding and supporting devices except for the constraints of the roller screw assembly itself and the loading mechanism. Therefore, the present invention has higher detection accuracy than the detection mechanism of the traditional screw guide rail workbench.
[0005] A further technical solution is that the shock-absorbing pad under the top plate is fixedly connected to the motor bracket, the motor bracket is fixedly connected to the motor, the motor is connected to the flexible coupling, the coupling is fixedly connected to the main shaft, the main shaft is fixedly connected to the fixture, the fixture clamps the part to be tested, a loading plate is set under the part to be tested, a spring is set under the loading plate, an electric push rod is set under the spring, a lower bracket is fixed under the electric push rod, a shock-absorbing pad is set under the lower bracket, and a bottom plate is fixed under the shock-absorbing pad; the part to be tested is a roller screw assembly in the automobile braking system. By loading the roller screw assembly to be tested with the shock-absorbing pad set below, the impact of the vibration of the loading plate can be reduced, and the screw or nut can be prevented from rotating.
[0006] A further technical solution is that two air vents are provided and are located at the upper and lower ends of the box respectively; a vibration utilization structure for simulating the working environment of the parts is also provided in the box; and the main shaft is a liquid dynamic and static pressure supported main shaft. Using liquid dynamic and static pressure supported main shaft can reduce the impact of main shaft vibration. The vibration utilization structure specifically includes a vibration guide fixedly connected to the main shaft (or to the loading plate or to the component to be tested), the vibration guide is connected to the switch of the ultrasonic atomizing nozzle, and the vibration guide forms a pulse opening and closing of the switch after being vibrated, so that the ultrasonic atomizing nozzle forms a pulsed spray spray, the ultrasonic atomizing nozzle is arranged on the inner wall of the box body, the water supply pipe of the ultrasonic atomizing nozzle is arranged in the wall of the box body, and the other end of the water supply pipe is connected to the water storage tank arranged outside the box body. An opening and closing valve is arranged on the water supply pipe, and the opening and closing valve is electrically connected to the controller. The controller is also electrically connected to a humidity sensor arranged in the box body. The humidity sensor in the box body is used to detect the humidity in the box body. When the humidity in the box body reaches a set value, that is, close to the working environment humidity of the component to be tested, the opening and closing valve is closed, so that the vibration of the component to be tested is utilized to realize pulsed spraying to form the required environmental humidity in the box body, so that the final measured data is closer to the actual working situation of the component, and the data is closer to the actual working conditions.
[0007] A further technical solution is that a guide rail is provided in the environmental chamber, and a slide groove adapted to the guide rail is provided at the lower end of the box body.
[0008] A further technical solution is that the acceleration sensor is a three-axis acceleration sensor and is used to detect the vibration of the main shaft, the component to be tested and the loading plate respectively, and the shock-absorbing pad is made of silicone material.
[0009] The advantages and beneficial effects of the present invention are that it can be used in conjunction with an environmental chamber to conveniently perform vibration tests on automotive parts, the coordination of the air vent and the plug can quickly achieve the required test environment, and the present invention has higher detection accuracy than the detection mechanism of a traditional screw guide rail workbench.
[0010] Loading the roller screw assembly under test via a damping pad located below can reduce the effects of load plate vibration and prevent the screw or nut from rotating.
[0011] Using liquid dynamic and static pressure to support the spindle can reduce the impact of spindle vibration. It can also simulate the working environment of automotive parts, making the measured data closer to the actual usage. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of a sound insulation mechanism for vibration detection of automobile parts of the present invention;
[0013] Figure 2 yes Figure 1 Schematic diagram of the internal structure.
[0014] In the figure: 1. Box body; 2. Top plate; 3. Bottom plate; 4. Shock-absorbing pad; 5. Air outlet; 6. Parts to be tested; 7. Fixture; 8. Acceleration sensor; 9. Motor bracket; 10. Motor; 11. Coupling; 12. Spindle; 13. Lower bracket; 14. Loading plate; 15. Spring; 16. Electric push rod. DETAILED DESCRIPTION
[0015] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0016] like Figure 1 to Figure 2As shown, the present invention is a sound insulation mechanism for vibration detection of automobile parts, including a box body 1 in the shape of a rectangular shell, the box body 1 including a top plate 2 and a bottom plate 3, a shock-absorbing pad 4 is arranged below the top plate 2 and above the bottom plate 3, an air vent 5 connected to the environmental chamber is arranged on the box body 1, and a plug for closing the inner cavity of the box body 1 is arranged at the air vent 5; a component to be tested 6 and a fixture 7 for clamping the component to be tested 6 are arranged in the box body 1, and an acceleration sensor 8 for vibration detection is also arranged in the box body 1. The motor bracket 9 is fixedly connected under the shock-absorbing pad 4 below the top plate 2, and the motor bracket 9 is fixedly connected to the motor 10. The motor 10 is connected to the flexible coupling 11, and the coupling 11 is fixedly connected to the main shaft 12. The main shaft 12 is fixedly connected to the fixture 7, and the fixture 7 clamps the component 6 to be tested. A loading plate 14 is set under the component 6 to be tested, and a spring 15 is set under the loading plate 14. An electric push rod 16 is set under the spring 15. A lower bracket 13 is fixedly set under the electric push rod 16, and a shock-absorbing pad 4 is set under the lower bracket 13. A bottom plate 3 is fixedly set under the shock-absorbing pad 4; the component 6 to be tested is a roller screw assembly in the automobile braking system. Two air vents 5 are provided and are respectively located at the upper and lower ends of the box body 1; the box body 1 is also provided with a vibration utilization structure for simulating the working environment of the component; the main shaft 12 is a liquid dynamic and static pressure support main shaft 12. A guide rail is provided in the environmental chamber, and a slide groove adapted to the guide rail is provided at the lower end of the box body 1. The acceleration sensor 8 is a three-axis acceleration sensor 8 and is used to detect the vibration of the main shaft 12, the component to be tested 6 and the loading plate 14 respectively. The shock-absorbing pad 4 is made of silicone material.
[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A sound insulation mechanism for vibration detection of automobile parts, characterized in that: The invention comprises a box body in the shape of a rectangular shell, the box body comprises a top plate and a bottom plate, a shock-absorbing pad is arranged under the top plate and above the bottom plate, an air vent connected to the environmental chamber is arranged on the box body, and a plug for closing the inner cavity of the box body is arranged at the air vent; parts to be tested and a fixture for clamping the parts to be tested are arranged in the box body, and an acceleration sensor for vibration detection is also arranged in the box body; a motor bracket is fixedly connected under the shock-absorbing pad under the top plate, a motor is fixedly connected under the motor bracket, the motor is connected to a flexible coupling, a main shaft is fixedly connected under the coupling, the main shaft is fixedly connected to the fixture, and the fixture is fixedly connected to the main shaft. A component to be tested is clamped below, a loading plate is arranged under the component to be tested, a spring is arranged under the loading plate, an electric push rod is arranged under the spring, a lower bracket is fixedly arranged under the electric push rod, a shock-absorbing pad is arranged under the lower bracket, and a bottom plate is fixedly arranged under the shock-absorbing pad; the component to be tested is a roller screw assembly in the automobile braking system; a vibration sensor is fixedly arranged on the screw or nut of the roller screw assembly to measure the vibration of the screw in three directions or measure the vibration of the nut to achieve higher detection accuracy without being constrained by other guiding and supporting devices except the roller screw assembly itself and the loading mechanism.
2. A sound insulation mechanism for vibration detection of automobile parts according to claim 1, characterized in that: The air vents are provided with two and are respectively located at the upper and lower ends of the box body; a vibration utilization structure for simulating the working environment of components is also provided in the box body; the main shaft is a liquid dynamic and static pressure supported main shaft.
3. A sound insulation mechanism for vibration detection of automobile parts according to claim 2, characterized in that: A guide rail is arranged in the environmental chamber, and a slide groove adapted to the guide rail is arranged at the lower end of the box body.
4. A sound insulation mechanism for vibration detection of automobile parts according to claim 3, characterized in that: The acceleration sensor is a three-axis acceleration sensor and is used to detect the vibration of the main shaft, the component to be tested and the loading plate respectively. The shock-absorbing pad is made of silicone material.