Hydraulic bushing structure with thermal barrier

Abstract

The utility model relates to vehicle chassis rubber metal damping part technical field, concretely is a kind of hydraulic bushing structure with heat insulation film.A kind of hydraulic bushing structure with heat insulation film, including hydraulic bushing, it is characterized by: in the outside of hydraulic bushing is equipped with the heat insulation film of high-temperature resistance, the heat insulation film includes heat insulation structure one, heat insulation structure two, the inner edge of heat insulation structure two is connected with the outer edge of hydraulic bushing and is in contact, the outer edge of heat insulation structure two is connected with the inner edge of heat insulation structure one.Compared with prior art, provide a kind of hydraulic bushing structure with heat insulation film, increase the heat insulation film of high-temperature resistance in the both sides of hydraulic bushing to improve the durability of hydraulic bushing under high temperature working condition, while ensure the dynamic and static performance of the structure, corresponding heat insulation film how design is proposed very high requirement.

Description

Technical Field

[0001] This utility model relates to the technical field of rubber-metal vibration damping components for vehicle chassis, specifically a hydraulic bushing structure with a heat insulation film. Background Technology

[0002] With OEMs expanding the scope of new vehicle R&D and demanding more detailed requirements, the demand for NVH performance and durability is increasing. Among these, the requirements for chassis vibration isolation performance are particularly important. Control arm hydraulic bushings play a key role in chassis NVH performance. However, due to the chassis design of OEMs, control arm hydraulic bushings are sometimes located very close to the engine, and the operating conditions are very harsh. In order to improve the high temperature resistance of hydraulic bushings, a hydraulic control arm bushing with a heat insulation film has been developed.

[0003] The hydraulic bushing of the control arm typically consists of a metal inner sleeve, main spring, inner cage, flow channel system, buffer block, damping fluid, and outer sealing system. Among these components, the flow channel system is the primary factor affecting damping, dynamic stiffness, and peak damping frequency. In a hydraulic bushing, the flow channel system mainly comprises the flow channel and buffer block. After assembly, the uniform cross-sectional area of ​​the flow channel system is called the flow channel cross-sectional area S, and the length of the flow channel through which the liquid flows is called the flow channel length L. When a car travels over a speed bump or pothole, it experiences a large displacement (amplitude). The suspension receives the excitation force, and the left hydraulic chamber of the main spring is compressed, causing the liquid to flow. This liquid flows through the flow channel inlet and around the entire inner cavity of the flow channel. During this movement, the liquid forms a vibrating liquid column within the flow channel. The inertial resistance generated by this liquid column during its movement is called damping. The vibration frequency at which the damping reaches its maximum peak value is called the peak damping frequency. Typically, the customer will input the required peak damping range, and the required flow channel length L and cross-sectional area S are calculated theoretically. During the development phase, a test sample needs to be prepared for the customer. The comprehensive and complex performance requirements of the aforementioned damping properties, along with the need to meet the vehicle's strength and durability, place high demands on all aspects of the hydraulic bushing and flow channel system. This requires consideration not only of vibration isolation and comfort but also of strength under extreme operating conditions. Therefore, the development of its structure, materials, and processes must be carefully considered during the development process. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this utility model provides a hydraulic bushing structure with a heat insulation film. By adding a high-temperature resistant heat insulation film to both sides of the hydraulic bushing, the durability of the hydraulic bushing under high-temperature conditions is improved. At the same time, the dynamic and static performance of the structure must be ensured. The design of the corresponding heat insulation film places high demands on the design.

[0005] To achieve the above objectives, a hydraulic bushing structure with a heat insulation film is designed, including a hydraulic bushing, characterized in that: a high-temperature resistant heat insulation film is sleeved on the outside of the hydraulic bushing, the heat insulation film including a heat insulation structure one and a heat insulation structure two, the inner edge of the heat insulation structure two is in contact with the outer edge of the hydraulic bushing, and the outer edge of the heat insulation structure two is connected to the inner edge of the heat insulation structure one.

[0006] The cross-section of the aforementioned heat insulation structure is L-shaped.

[0007] The cross-section of the second heat insulation structure is wavy, and it is bifurcated on the outer edge of the second heat insulation structure.

[0008] The material of the aforementioned heat insulation structure is PA66GF30.

[0009] The material of the second heat insulation structure is TPE-TPS.

[0010] The heat insulation film is produced by secondary injection molding.

[0011] Compared with the prior art, this utility model provides a hydraulic bushing structure with a heat insulation film. By adding a high-temperature resistant heat insulation film on both sides of the hydraulic bushing, the durability of the hydraulic bushing under high-temperature conditions is improved. At the same time, the dynamic and static performance of the structure must be ensured. The design of the corresponding heat insulation film places high demands on the design. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the installation of this utility model.

[0014] See Figure 1 , Figure 2 1 is the first heat insulation structure, 2 is the second heat insulation structure, 3 is the hydraulic bushing, and 4 is the bushing support. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, a high-temperature resistant heat insulation film is fitted on the outside of the hydraulic bushing 3. The heat insulation film includes heat insulation structure one and heat insulation structure two. The inner edge of heat insulation structure two 2 is in contact with the outer edge of the hydraulic bushing 3, and the outer edge of heat insulation structure two 2 is connected to the inner edge of heat insulation structure one 1.

[0017] The cross-section of the thermal insulation structure 1 is L-shaped.

[0018] The cross-section of the second heat insulation structure is wavy, and it is bifurcated on the outer edge of the second heat insulation structure.

[0019] The material of insulation structure 1 is PA66GF30.

[0020] The material of thermal insulation structure 2 is TPE-TPS.

[0021] The heat insulation film is produced by secondary injection molding.

[0022] This invention improves the durability of the hydraulic bushing 3 under high-temperature conditions by adding a high-temperature resistant heat insulation film to the outer edge of the hydraulic bushing 3. At the same time, it is necessary to ensure the dynamic and static performance of the structure. The design of the corresponding heat insulation film places high demands on the design.

[0023] The heat insulation film is composed of two materials: heat insulation structure 1 is made of PA66GF30, and heat insulation structure 2 is made of TPE-TPS. The product is produced by secondary injection molding. Heat insulation structure 1 is responsible for fixing to the outer edge of the hydraulic bushing 3, while heat insulation structure 2 is softer and has the characteristics of being easily deformable and resistant to high temperatures.

[0024] The heat insulation membrane structure of this utility model takes into account the high temperature and high intensity working conditions and selects matching materials. Under this design structure, the hydraulic bushing not only meets the dynamic and static characteristics requirements, but also meets the usage requirements of the parts under high temperature conditions.

Claims

1. A hydraulic bushing structure with a heat insulation film, comprising a hydraulic bushing, characterized in that: A high-temperature resistant heat insulation film is provided on the outside of the hydraulic bushing (3). The heat insulation film includes heat insulation structure one and heat insulation structure two. The inner edge of heat insulation structure two (2) is in contact with the outer edge of the hydraulic bushing (3), and the outer edge of heat insulation structure two (2) is connected to the inner edge of heat insulation structure one (1).

2. The hydraulic bushing structure with a heat insulation film according to claim 1, characterized in that: The cross-section of the aforementioned heat insulation structure (1) is L-shaped.

3. The hydraulic bushing structure with a heat insulation film according to claim 1, characterized in that: The cross-section of the heat insulation structure 2 (2) is wavy, and a branch is provided on the outer edge of the heat insulation structure 2 (2).

4. A hydraulic bushing structure with a heat-insulating film according to claim 1 or 2, characterized in that: The material of the heat insulation structure (1) is PA66GF30.

5. A hydraulic bushing structure with a heat-insulating film according to claim 1 or 3, characterized in that: The material of the heat insulation structure 2 (2) is TPE-TPS.

6. The hydraulic bushing structure with a heat insulation film according to claim 1, characterized in that: The heat insulation film is produced by secondary injection molding.

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