A shock-absorbing fixing structure of an electric air-conditioning compressor for a passenger car

Abstract

The utility model relates to a passenger train electric air conditioner compressor damping fixing structure, including air conditioner bottom shell, electric compressor, rubber damping pad, spacing block and fastener, be provided with the pre -buried connecting piece for fixing electric compressor on air conditioner bottom shell, be provided with the recess of being suitable for spacing block on rubber damping pad, and fastener is in turn through air conditioner bottom shell, spacing block, rubber damping pad and is fastened through locking part, through pre -buried connecting piece enhancement air conditioner bottom shell and the connecting stability of compressor, avoid vibration direct transmission, the embedded connection and tubular structure of spacing block and rubber damping pad, guarantee damping effect and limit excessive displacement, fastener cooperation flat pad dispersion locking force, prevent rubber damping pad uneven stress, spacing axle effective control electric compressor transverse displacement, the combination of rigid spacing block and low hardness rubber pad, realize the balance of damping and spacing, to solve the contradiction of vibration noise and structural stability in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning compressor technology, and in particular to a shock-absorbing and fixing structure for an electric air conditioning compressor for buses. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Air conditioning is an integral part of vehicle structure, designed to improve the environment and enhance passenger comfort under any climate and driving conditions. Due to the fixed structure of the electric air conditioning compressor in existing buses, the vibration frequency of the compressor itself is transmitted into the vehicle through the fixing bolts, causing a booming sound. Traditional structures use rigid connectors to directly fix the compressor, which easily leads to vibration being transmitted through the vehicle body, generating noise. While reducing the hardness of the rubber damping pads can absorb the vibration frequency of the electric compressor, this reduction in pad hardness results in excessive amplitude vibration of the electric compressor during vehicle operation, causing fatigue damage to air conditioning pipes, brackets, and other components, leading to refrigerant leakage, reduced cooling efficiency, and severely impacting passenger comfort. Utility Model Content

[0004] The purpose of this utility model is to provide a shock-absorbing and fixing structure for an electric air conditioning compressor in a passenger vehicle, which can at least solve one of the above-mentioned technical problems.

[0005] To achieve the above objectives, one or more embodiments of this utility model provide a vibration damping and fixing structure for a bus electric air conditioning compressor, including an air conditioning base shell, an electric compressor, a rubber vibration damping pad, a limiting block, and fasteners; the air conditioning base shell is provided with a pre-embedded connector for fixing the electric compressor; the limiting block is provided with a central hole, and a tubular structure is provided inside the central hole; the rubber vibration damping pad is provided with a groove adapted to the limiting block, and the limiting block and the rubber vibration damping pad form an embedded connection; the fasteners pass through the air conditioning base shell, the limiting block, and the rubber vibration damping pad in sequence and are fastened by locking components.

[0006] Furthermore, the pre-embedded connector is a bolt structure, and the bolt is pre-embedded below the air conditioner base.

[0007] Furthermore, the tubular structure is a nylon tube, which is embedded in the central hole of the limiting block and forms a fixed connection with the limiting block.

[0008] Furthermore, the groove shape of the rubber shock-absorbing pad matches the shape of the limiting block, and the limiting block is embedded entirely into the groove.

[0009] Furthermore, the fastener includes a bolt, a flat washer, and a lock nut. The bolt passes through the air conditioner bottom shell, the limiting block, the rubber shock-absorbing pad, and the flat washer in sequence, and is then fastened by the lock nut.

[0010] Furthermore, the flat washer is positioned between the rubber shock-absorbing pad and the locking nut to distribute the locking force.

[0011] Furthermore, the limiting shaft is positioned between the electric compressor and the rubber damping pad to limit the lateral displacement of the electric compressor.

[0012] Furthermore, the limiting block is made of a rigid material, which is selected from metals or engineering plastics; the rubber shock-absorbing pad is made of a low-hardness elastic material.

[0013] Furthermore, the electric compressor is connected to the air conditioner base shell through at least two sets of symmetrically arranged shock-absorbing and fixing structures to achieve balanced shock absorption.

[0014] Furthermore, the axial length of the limiting block is greater than the thickness of the rubber damping pad, so as to form an axial limit on the rubber damping pad.

[0015] The beneficial effects of the embodiments of this utility model are as follows: This utility model enhances the connection stability between the air conditioner base and the compressor by pre-embedded connectors, avoiding direct transmission of vibration; the embedded connection and tubular structure of the limiting block and the rubber damping pad ensure both shock absorption and limit excessive displacement; the fasteners, together with the flat pads, disperse the locking force and prevent uneven stress on the rubber damping pads.

[0016] The lateral displacement of the electric compressor is effectively controlled by the limiting shaft. The combination of rigid limiting blocks and low-hardness rubber pads achieves a balance between vibration reduction and limiting. The symmetrical arrangement of multiple sets of structures ensures uniform force distribution and avoids unilateral overload, thereby resolving the contradiction between vibration noise and structural stability in existing technologies. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a three-dimensional schematic diagram of the shock-absorbing fixing structure according to an embodiment of the present utility model.

[0019] In the diagram: 1. Electric compressor; 2. Fastener; 3. Limiting shaft; 4. Rubber shock-absorbing pad; 5. Locking nut; 6. Flat washer; 7. Limiting block; 8. Nylon tube; 9. Embedded connector; 10. Air conditioner base. Detailed Implementation

[0020] like Figure 1As shown in the embodiment of this utility model, a shock-absorbing and fixing structure for a bus electric air conditioning compressor is described, including an air conditioning base shell 10, an electric compressor 1, a rubber shock-absorbing pad 4, a limiting block 7, and a fastener 2.

[0021] like Figure 1 As shown, the air conditioner base shell 10 is provided with a pre-embedded connector 9 for fixing the electric compressor 1; the limiting block 7 is provided with a central hole, and a tubular structure is provided in the central hole; the rubber shock-absorbing pad 4 is provided with a groove that matches the limiting block 7, and the limiting block 7 and the rubber shock-absorbing pad 4 form an embedded connection; the fastener 2 passes through the air conditioner base shell 10, the limiting block 7, and the rubber shock-absorbing pad 4 in sequence and is fastened by the locking component.

[0022] Specifically, the pre-embedded connector 9 provides a fixed reference for the electric compressor 1, avoiding stress concentration caused by traditional exposed bolts. The limiting block 7 enhances its compressive strength through the tubular structure within the central hole, forming a mechanical interlock with the groove of the rubber damping pad 4. While allowing elastic deformation of the rubber, it restricts excessive displacement through the rigid contact surface. The fastener 2 applies a balanced preload after penetrating each layer of the structure, making the rigid limiting block 7 and the elastic damping pad form a composite load-bearing system. When the compressor vibrates, the rubber damping pad 4 first absorbs high-frequency vibration energy, the limiting block 7 blocks the transmission path of low-frequency vibration through the rigid contact surface, and the through-type fastening structure maintains the overall connection rigidity.

[0023] The pre-embedded connector 9 is a bolt structure, pre-embedded below the air conditioning base 10. The bolt structure is pre-embedded below the air conditioning base 10, and the electric compressor 1 is fixed via the threaded portion of the bolt during installation. Because the main body of the bolt is embedded inside the base, with only the threaded end exposed for connection, the path of vibration energy transmitted to the vehicle body via the bolt is shortened. Simultaneously, the pre-embedded design avoids the risk of thread loosening due to vibration associated with traditional external bolts. Combined with the rubber damping pad 4 in subsequent claims, rigid connection and elastic support complement each other. During vehicle operation, the vibration generated by the electric compressor 1 is first transmitted to the base through the bolt, but due to the reduced contact area of ​​the pre-embedded structure, some of the vibration energy is dissipated before being transmitted to the vehicle body.

[0024] The tubular structure is a nylon tube 8, which is embedded in the central hole of the limiting block 7 and forms a fixed connection with the limiting block 7. After being embedded in the central hole of the limiting block 7, the rigidity of the nylon material maintains the shape stability of the tubular structure, while its elastic deformation capability absorbs the vibration energy transmitted by the electric compressor 1. The interference fit between the nylon tube 8 and the limiting block 7 prevents axial movement and ensures the reliability of the connection structure. The inherent damping characteristics of the nylon material can effectively reduce vibration transmission efficiency and avoid vibration damping failure caused by the overlap of the material's resonant frequency and the compressor's vibration frequency.

[0025] The groove shape of the rubber damping pad 4 matches the shape of the limiting block 7. The limiting block 7 is fully embedded in the groove. When the rubber damping pad 4 undergoes elastic deformation, the contact surface between the limiting block 7 and the groove generates a reaction force. This reaction force is distributed along the inner wall of the groove, forming a three-dimensional constraint on the lateral displacement of the rubber damping pad 4. When the electric compressor 1 vibrates, the rubber damping pad 4 absorbs the vertical vibration energy through elastic deformation, while the geometric fit between the limiting block 7 and the groove limits the lateral displacement amplitude through the reaction force of the contact surface. Thus, the hardness of the rubber damping pad 4 can be reduced to improve vibration absorption performance, while the cooperation between the rigid limiting block 7 and the groove offsets the risk of excessive amplitude.

[0026] Fastener 2 includes a bolt, a flat washer 6, and a locking nut 5. The bolt passes sequentially through the air conditioner base shell 10, the limiting block 7, the rubber damping pad 4, and the flat washer 6 before being tightened by the locking nut 5. The shank of the bolt passes sequentially through the pre-embedded connection hole in the air conditioner base shell 10, the center hole of the limiting block 7, and the axial through hole of the rubber damping pad 4, with its end extending to the installation position of the flat washer 6. The flat washer 6 is positioned between the upper surface of the rubber damping pad 4 and the locking nut 5, with its plane forming full circumferential contact with the rubber damping pad 4. When the locking nut 5 is tightened axially along the bolt, the flat washer 6 converts the concentrated pressure applied by the nut into a uniformly distributed surface load, preventing excessive compression deformation in localized areas of the rubber damping pad 4. The through-type connection of the bolt forms a rigid constraint path, and the tubular structure of the limiting block 7 is clearance-fitted with the bolt, jointly restricting the radial displacement of the rubber damping pad 4.

[0027] A flat washer 6 is positioned between the rubber damping pad 4 and the locking nut 5 to distribute the tightening force. When the locking nut 5 is tightened, the axial tightening force is evenly distributed to the upper surface of the rubber damping pad 4 through the planar structure of the flat washer 6. The outer diameter of the flat washer 6 is larger than the contact edge of the locking nut 5, so that the compressive stress originally concentrated at the edge of the nut is distributed to the entire annular area of ​​the rubber damping pad 4. This dispersion effect can reduce the pressure value per unit area of ​​the rubber damping pad 4, preventing it from permanent deformation or structural cracking due to excessive local compression deformation. At the same time, the rigid material of the flat washer 6 can restrain the lateral creep of the rubber damping pad 4 during the tightening process, ensuring the structural stability after tightening.

[0028] A limiting shaft 3 is positioned between the electric compressor 1 and the rubber damping pad 4 to restrict the lateral displacement of the electric compressor 1. The rigid structure of the limiting shaft 3 is fixed between the bottom of the electric compressor 1 and the upper surface of the rubber damping pad 4. When the vehicle experiences lateral vibrations during travel, the limiting shaft 3 forms a physical barrier with the compressor housing, limiting the lateral movement of the compressor to within the shaft diameter. The rubber damping pad 4 retains its elastic deformation capability even when subjected to vertical vibrations from the compressor, while the limiting shaft 3 only constrains the lateral degree of freedom. The combined effect of both maintains the damping function and controls the amount of displacement.

[0029] The limiting block 7 is made of existing rigid materials, selected from metals or engineering plastics; the rubber damping pad 4 is made of existing low-hardness elastic materials. The limiting block 7 made of rigid materials and the rubber damping pad 4 made of low-hardness elastic materials form a complementary structure. The rigid limiting block 7 constrains the axial displacement of the rubber damping pad 4 through its own deformation resistance, preventing the compressor from generating excessive amplitude when the vehicle is bumpy or accelerating rapidly; the low-hardness rubber damping pad 4, under the displacement restriction of the rigid limiting block 7, fully absorbs the vibration energy generated by the compressor operation through elastic deformation. The combination of the two allows the compressor to maintain its vibration damping performance while avoiding fatigue fracture of connecting parts or loosening of pipe interfaces caused by excessive deformation of the rubber damping pad 4.

[0030] The electric compressor 1 is connected to the air conditioning base 10 through at least two sets of symmetrically arranged damping and fixing structures to achieve balanced vibration damping. When the electric compressor 1 vibrates, the symmetrically distributed damping and fixing structure groups ensure that the load at each connection point is uniformly transferred to the air conditioning base 10 along the axial direction. Due to the spatial constraint system formed by the symmetrical layout, the rubber damping pad 4 maintains synchronous deformation during compression and rebound, preventing plastic deformation of the damping pad on one side due to overload. At the same time, the reaction forces generated by the multi-point symmetrical support cancel each other out, effectively suppressing the lateral deflection moment generated by the electric compressor 1 when the vehicle is bumpy, and preventing the air conditioning pipes from twisting or breaking due to asymmetrical vibration.

[0031] The axial length of the limiting block 7 is greater than the thickness of the rubber damping pad 4, thus providing axial restraint to the rubber damping pad 4. In the assembled state, the upper and lower end faces of the limiting block 7 extend beyond the upper and lower surfaces of the rubber damping pad 4, forming a mechanical stop structure. When the electric compressor 1 vibrates, the axial compressive deformation of the rubber damping pad 4 is limited to the difference between the length of the limiting block 7 and the thickness of the damping pad. The rigid limiting block 7 prevents excessive compression of the damping pad through end face contact, while the damping pad can still absorb vibration energy through elastic deformation.

[0032] The working principle of this utility model: The pre-embedded connectors in the air conditioner's base provide a fixed reference, while the limiting blocks are embedded in the grooves of the rubber damping pads to form an embedded constraint. Fasteners penetrate each layer of the structure to apply preload. During operation, the rubber damping pads absorb the vibration energy of the electric compressor, the limiting blocks restrict excessive displacement through rigid contact surfaces, the tubular structure enhances the load-bearing stiffness, and the limiting shaft further constrains lateral movement. The symmetrical arrangement of multiple sets of structures ensures a uniform distribution of vibration loads, achieving a balance between vibration damping performance and installation stability.

[0033] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A vibration damping and fixing structure for an electric air conditioning compressor in a passenger vehicle, characterized in that, The device includes an air conditioner base shell, an electric compressor, rubber shock-absorbing pads, a limiting block, and fasteners. The air conditioner base shell has a pre-embedded connector for fixing the electric compressor. The limiting block has a central hole with a tubular structure inside. The rubber shock-absorbing pad has a groove that matches the limiting block, and the limiting block and the rubber shock-absorbing pad form an embedded connection. The fasteners pass through the air conditioner base shell, the limiting block, and the rubber shock-absorbing pad in sequence and are fastened by locking components.

2. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The embedded connector is a bolt structure, and the bolt is embedded in the lower part of the air conditioner base.

3. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The tubular structure is a nylon tube, which is embedded in the central hole of the limiting block and forms a fixed connection with the limiting block.

4. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The groove shape of the rubber shock-absorbing pad matches the shape of the limiting block, and the limiting block is embedded entirely into the groove.

5. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The fasteners include bolts, flat washers, and lock nuts. The bolts pass through the air conditioner bottom shell, the limiting block, the rubber shock-absorbing pad, and the flat washer in sequence, and are then tightened by the lock nuts.

6. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 5, characterized in that, The flat washer is placed between the rubber shock-absorbing pad and the locking nut to distribute the locking force.

7. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, A limiting shaft is provided between the electric compressor and the rubber shock-absorbing pad, which is used to limit the lateral displacement of the electric compressor.

8. The vibration damping and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The limiting block is made of a rigid material, and the rubber shock-absorbing pad is made of a low-hardness elastic material.

9. The vibration damping and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The electric compressor is connected to the air conditioner base shell through at least two sets of symmetrically arranged shock-absorbing and fixing structures.

10. The shock-absorbing and fixing structure for a bus electric air conditioning compressor as described in claim 1, characterized in that, The axial length of the limiting block is greater than the thickness of the rubber damping pad, thus limiting the axial movement of the rubber damping pad.

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