Damping rubber mat for automobile engine support

Abstract

The utility model relates to the technical field of engine bracket damping rubber mat application, and discloses an automobile engine bracket damping rubber mat which comprises a rubber mat assembly, a mounting seat and a bracket, the rubber mat assembly comprises an outer layer, a middle layer and an inner layer, a heat dissipation groove is formed in the outer wall of the outer layer, and the mounting seat is arranged in the middle layer. A plurality of connecting grooves are distributed in the surface of the outer layer at equal intervals in the circumferential direction, a connecting strip is slidably connected into each connecting groove, and ribs are fixedly connected to the sides, away from the center of the rubber mat assembly, of the connecting strips. According to the rubber mat, the ribs and the rubber mat body are not integrally formed, only universal connecting grooves need to be formed in the outer layer of the rubber mat, the number of mold cores is reduced, the machining cost of the mold is reduced, the mold is simple in structure and convenient to operate, and the production efficiency is improved. And secondly, through the combination of the silicone rubber outer layer, the metal net middle layer and the natural rubber inner layer, high temperature resistance, aging resistance and vibration reduction performance are considered, and compared with a single rubber mat, the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of engine bracket shock-absorbing rubber pad application technology, specifically a kind of automotive engine bracket shock-absorbing rubber pad. Background Technology

[0002] Automotive engine mount damping pads are a type of damping material used in engine mounts. Their main function is to absorb and reduce the impact of engine vibration on other parts of the vehicle, thereby improving the comfort of the vehicle's ride.

[0003] Chinese Patent Publication No. (CN218440360U) discloses an engine mount shock absorber pad, including a pad body. Multiple ribs are evenly fixedly connected to the outer wall of the pad body to reduce installation errors and ensure stable fixation. A mounting base is tightly fitted onto the pad body via the multiple ribs for positioning and fixing the pad body. A bracket is interference-fitted to the inner wall of the pad body to support the engine. The outer wall of the pad body and one side of the multiple ribs near the bottom form an arc-shaped transition, facilitating bending at the arc-shaped connection point of the ribs during insertion and installation, increasing pressure on the inner wall of the mounting base, and ensuring stable fixation.

[0004] The aforementioned comparative document shows that the rubber pad body and the ribs are integrated into one piece. This structure requires high precision and complexity in the mold, which increases the difficulty of mold design and manufacturing, and may increase production costs.

[0005] In view of this, the present invention solves the above-mentioned technical problems by proposing a shock-absorbing rubber pad for an automobile engine bracket. Utility Model Content

[0006] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a shock-absorbing rubber pad for an automotive engine bracket. In this utility model, the rib and the pad body are not integrally formed. The mold only needs to open a universal connecting groove on the outer layer of the pad, reducing the number of cores and lowering the mold processing cost. At the same time, the connecting strip and the connecting groove adopt a plug-in fit. When a rib is damaged due to long-term vibration wear or external impact, it is not necessary to disassemble the entire pad. Simply use a tool to pull the connecting strip of the damaged rib out of the connecting groove and replace it with a new rib assembly.

[0007] This utility model provides the following technical solution: a shock-absorbing rubber pad for an automotive engine bracket, comprising a rubber pad assembly, a mounting base, and a bracket;

[0008] The rubber pad assembly includes an outer layer, a middle layer and an inner layer. The outer wall of the outer layer is provided with heat dissipation grooves. The surface of the outer layer is provided with a plurality of connecting grooves evenly distributed along the circumference. A connecting strip is slidably connected in each connecting groove. A rib is fixedly connected to the side of the connecting strip away from the center of the rubber pad assembly.

[0009] The inner wall of the inner layer is interference-fitted with the bracket, and the outer wall of the outer layer is fixed to the mounting base by means of ribs.

[0010] In a preferred embodiment of this invention, the outer layer is a silicone rubber layer, the middle layer is a metal mesh reinforcement layer, and the inner layer is a natural rubber layer. The outer layer, middle layer, and inner layer are integrally formed by a vulcanization process.

[0011] As a preferred embodiment of this utility model, the heat dissipation groove is spirally arranged around the outer wall of the outer layer, the cross-sectional shape of the rib is a trapezoid with a narrow top and a wide bottom, and the end face of the rib near the mounting base is a 45° inclined plane.

[0012] As a preferred embodiment of this utility model, the rib has a honeycomb-shaped cavity inside, and the honeycomb-shaped cavity is filled with sound-insulating particles, which are aluminum foam honeycomb cavities.

[0013] As a preferred embodiment of this utility model, the inner wall of the inner layer is provided with anti-slip protrusions, which are evenly distributed in a hemispherical shape.

[0014] As a preferred embodiment of this utility model, the connecting groove is a T-groove or a dovetail groove, and the fitting gap between the connecting strip and the connecting groove is 0.1-0.3mm, allowing the connecting strip to slide and adjust radially.

[0015] As a preferred embodiment of this utility model, the outer surface of the rib is provided with anti-slip texture, which is a grid pattern.

[0016] As a preferred embodiment of this utility model, the sound-insulating particles have a particle size of 0.5 to 2 mm and a filling rate of 60% to 80% of the cavity volume, and the surface of the sound-insulating particles is coated with a damping adhesive layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the prior art, the rib and the rubber pad body are integrally formed, requiring multiple sets of high-precision molds to be customized for different specifications of mounting bases; in this utility model, the rib and the rubber pad body are not integrally formed, and the mold only needs to open a universal connecting groove on the outer layer of the rubber pad, reducing the number of cores and reducing the mold processing cost. At the same time, the connecting strip and the connecting groove adopt a plug-in fit. When a certain rib is damaged due to long-term vibration wear or external impact, it is not necessary to disassemble the entire rubber pad. It is only necessary to use a tool to pull the connecting strip of the damaged rib out of the connecting groove and replace it with a new rib assembly.

[0019] 2. This utility model combines a silicone rubber outer layer, a metal mesh middle layer, and a natural rubber inner layer, which takes into account high temperature resistance, aging resistance, and shock absorption performance. Compared with a single rubber pad, the service life is extended. At the same time, the spiral heat dissipation groove reduces the surface temperature of the outer layer, reducing the risk of rubber hardening and cracking due to high temperature, and further improving durability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the adhesive pad assembly structure of this utility model;

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 This is an exploded view of the present invention.

[0024] In the diagram: 1. Mounting base; 101. Bracket; 2. Outer layer; 201. Middle layer; 202. Inner layer; 3. Heat dissipation groove; 4. Connecting groove; 401. Connecting strip; 402. Rib; 5. Anti-slip protrusions. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-4 As shown, a car engine mount shock-absorbing pad includes a pad assembly, a mounting base 1, and a bracket 101.

[0027] The rubber pad assembly includes an outer layer 2, a middle layer 201 and an inner layer 202. The outer wall of the outer layer 2 is provided with heat dissipation grooves 3. Multiple connecting grooves 4 are evenly distributed along the circumferential direction on the surface of the outer layer 2. A connecting strip 401 is slidably connected in each connecting groove 4. A rib 402 is fixedly connected to the side of the connecting strip 401 away from the center of the rubber pad assembly.

[0028] The inner wall of the inner layer 202 is interference-fitted with the bracket 101, and the outer wall of the outer layer 2 is fixed to the mounting base 1 by means of the rib 402;

[0029] The outer layer 2 is a silicone rubber layer, the middle layer 201 is a metal mesh reinforcement layer, and the inner layer 202 is a natural rubber layer. The outer layer 2, the middle layer 201 and the inner layer 202 are integrally formed by vulcanization process.

[0030] The heat dissipation groove 3 is spirally arranged around the outer wall of the outer layer 2. The cross-sectional shape of the rib 402 is a trapezoid with a narrow top and a wide bottom. The end face of the rib 402 near the mounting base 1 is a 45° inclined plane.

[0031] The rib 402 has a honeycomb-shaped cavity inside, which is filled with sound-insulating particles. The sound-insulating particles are aluminum foam honeycomb cavities.

[0032] The inner wall of the inner layer 202 is provided with anti-slip protrusions 5, which are evenly distributed in a hemispherical shape.

[0033] The connecting groove 4 is a T-groove or a dovetail groove, and the fitting clearance between the connecting strip 401 and the connecting groove 4 is 0.1-0.3mm, allowing the connecting strip 401 to slide and adjust radially.

[0034] The outer surface of the rib 402 is provided with anti-slip texture, which is a grid pattern;

[0035] The mesh shape is used to enhance friction with mounting base 1.

[0036] The sound insulation particles have a particle size of 0.5 to 2 mm and a filling rate of 60% to 80% of the cavity volume. The surface of the sound insulation particles is coated with a damping adhesive layer.

[0037] The damping adhesive layer is used to absorb high-frequency vibration noise.

[0038] The working principle of this automotive engine mount shock-absorbing pad is based on a multi-layer composite structure, adjustable rib design, and functional integration. The specific collaborative process is as follows:

[0039] Core function of shock absorption achieved

[0040] Elastic buffer: The inner layer 202 is made of high-resilience natural rubber (resilience rate ≥70%), which is directly pressurized with the engine bracket 101. It absorbs the high-frequency vibration energy of the engine during operation through its own elastic deformation, reducing the transmission of vibration to the frame.

[0041] Structural reinforcement: The metal mesh (such as 304 stainless steel mesh) of the middle layer 201 is embedded between the inner and outer layers to form a composite structure that combines rigidity and flexibility. This not only prevents the rubber layer from tearing due to long-term stress, but also disperses vibration stress through the toughness of the metal mesh, thereby improving the overall load-bearing capacity.

[0042] Installation and Adjustment

[0043] The connecting strip 401 and the connecting groove 4 are plugged in. When a certain rib 402 is damaged due to long-term vibration wear or external impact, it is not necessary to disassemble the entire rubber pad. You can simply use a tool to pull the connecting strip 401 of the damaged rib out of the connecting groove 4 and replace it with a new rib assembly.

[0044] Angled surface and anti-slip aids: The trapezoidal cross section (narrower at the top and wider at the bottom) and 45° angled surface design of the rib 402 reduce the resistance when inserting into the mounting base; the grid anti-slip texture on the outer surface increases the friction with the mounting base and prevents loosening caused by vibration.

[0045] Heat dissipation and sound insulation work together

[0046] High-efficiency heat dissipation: The spiral heat dissipation grooves on the outer wall of the outer layer 2 increase the surface area and accelerate heat dissipation through airflow, reducing the risk of rubber aging caused by high engine temperature;

[0047] Vibration and noise absorption: The honeycomb cavity inside the rib 402 is filled with foam aluminum sound insulation particles (particle size 0.5-2mm, filling rate 60%-80%). The damping adhesive layer on the surface of the particles can absorb the high-frequency noise generated by vibration, thus achieving both vibration reduction and noise reduction.

[0048] Connection stability guarantee

[0049] Inner anti-slip design: When the hemispherical anti-slip protrusions 5 on the inner wall of the inner layer 202 are interference-fitted with the bracket 101, the protrusions squeeze to generate local high friction force, preventing the rubber pad and the bracket from sliding relative to each other due to vibration.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0051] 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 shock-absorbing rubber pad for an automotive engine mount, comprising: The rubber pad assembly, the mounting base (1), and the bracket (101); The feature is that the adhesive pad assembly includes an outer layer (2), a middle layer (201) and an inner layer (202). The outer wall of the outer layer (2) is provided with heat dissipation grooves (3). The surface of the outer layer (2) is provided with a plurality of connecting grooves (4) evenly distributed in the circumferential direction. A connecting strip (401) is slidably connected in each connecting groove (4). A rib (402) is fixedly connected to the side of the connecting strip (401) away from the center of the adhesive pad assembly. The inner wall of the inner layer (202) is press-fitted with the bracket (101), and the outer wall of the outer layer (2) is fixed to the mounting base (1) by means of ribs (402).

2. The automotive engine bracket shock-absorbing pad according to claim 1, characterized in that: The outer layer (2) is a silicone rubber layer, the middle layer (201) is a metal mesh reinforcement layer, and the inner layer (202) is a natural rubber layer. The outer layer (2), the middle layer (201) and the inner layer (202) are integrally formed by vulcanization process.

3. The automotive engine bracket shock-absorbing pad according to claim 1, characterized in that: The heat dissipation groove (3) is spirally arranged around the outer wall of the outer layer (2). The cross-sectional shape of the rib (402) is a trapezoid with a narrow top and a wide bottom. The end face of the rib (402) near the mounting base (1) is inclined at 45°.

4. The automotive engine bracket shock-absorbing pad according to claim 1, characterized in that: The rib (402) has a honeycomb-shaped cavity inside, and the honeycomb-shaped cavity is filled with sound-insulating particles, which are aluminum foam honeycomb cavities.

5. The shock-absorbing rubber pad for an automotive engine bracket according to claim 1, characterized in that: The inner wall of the inner layer (202) is provided with anti-slip protrusions (5), which are evenly distributed in a hemispherical shape.

6. The automotive engine bracket shock-absorbing pad according to claim 1, characterized in that: The connecting groove (4) is a T-groove or a dovetail groove. The fitting gap between the connecting strip (401) and the connecting groove (4) is 0.1-0.3mm, allowing the connecting strip (401) to slide and adjust radially.

7. The automotive engine bracket shock-absorbing pad according to claim 1, characterized in that: The outer surface of the rib (402) is provided with anti-slip texture, which is a grid pattern.

8. The automotive engine bracket shock-absorbing pad according to claim 4, characterized in that: The sound-insulating particles have a particle size of 0.5 to 2 mm and a filling rate of 60% to 80% of the cavity volume. The surface of the sound-insulating particles is coated with a damping adhesive layer.

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