A shock-absorbing structure made of rubber.

Abstract

This utility model discloses a vibration damping structure made of rubber, specifically relating to the field of vibration damping structure technology. It includes a vibration damping pad with a central through-hole and an inclined rubber arm inside. An axial central groove is formed on one side of the outer surface of the vibration damping pad. In practical operation, the vibration damping pad, especially the inclined rubber wall, undergoes elastic deformation to absorb and reduce the vibration of the vacuum pump, achieving the purpose of reducing noise and vibration. Furthermore, the vibration damping pad has a simple structure and is easy to assemble. Due to the characteristics of the rubber material and suitable hardness control, the vibration damping pad can be assembled into the metal bracket hole by hand without tools. The vibration damping pad does not significantly change the appearance of the vacuum pump assembly or increase its weight, complying with national energy conservation and emission reduction initiatives. It can effectively reduce the vibration and noise generated during vacuum pump operation, providing drivers with a more comfortable driving experience.

Description

Technical Field

[0001] This utility model relates to the field of shock absorption structure technology, and in particular to a shock absorption structure made of rubber. Background Technology

[0002] The function of an automotive vacuum pump is to expel the air inside the vacuum booster chamber of a vehicle to create a negative pressure state to provide braking assistance. An automotive vacuum pump is a type of metering diaphragm pump. When it is running, it can continuously pump air into the device to make it close to a vacuum state, creating a negative pressure and generating a relatively large suction force, which can assist the brakes. However, the vacuum pump motor will generate regular vibrations during operation. This vibration and the noise generated will be transmitted to the driver through the vacuum pump bracket, the car chassis mechanism, etc., resulting in a poor driving experience. Therefore, it is generally equipped with a rubber shock-absorbing structure.

[0003] Current rubber-based shock-absorbing structures are relatively complex and heavy, and often require external equipment for installation. Therefore, in order to solve the above defects, the inventor proposes a rubber-based shock-absorbing structure. Utility Model Content

[0004] The main purpose of this invention is to provide a shock-absorbing structure made of rubber, which can effectively solve the problems of heavy weight and complex structure of existing shock-absorbing structures.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A shock-absorbing structure made of rubber includes a shock-absorbing pad, the shock-absorbing pad having a central through hole inside, a diagonal rubber arm inside the shock-absorbing pad, and an axial central groove on one side of the outer surface of the shock-absorbing pad.

[0007] Preferably, the shock-absorbing pad includes a rubber inner layer, a rubber middle layer is provided on the outer surface of the rubber inner layer, a rubber outer layer is provided on the outer surface of the rubber middle layer, and the rubber middle layer is located between the rubber inner layer and the rubber outer layer.

[0008] Preferably, the outer surface of the shock-absorbing pad is provided with a protective sleeve, the protective sleeve includes a buffer layer, the outer surface of the buffer layer is provided with a support layer, and the outer surface of the support layer is provided with a wear-resistant layer.

[0009] Preferably, the inner wall of the central through hole is provided with a bottom friction layer.

[0010] Preferably, the shock-absorbing pad shown has a metal heat sink embedded inside.

[0011] Preferably, a reinforcing sheet is embedded inside the inclined rubber arm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses a vibration damping structure made of rubber. By setting a vibration damping pad, in actual operation, the vibration damping pad is connected to the vacuum pump through a bracket and fixing bolts and then fixed to the vehicle chassis frame. The vibration generated during the operation of the vacuum pump is transmitted to the vibration damping pad through the fixing bolts. The vibration damping pad as a whole, especially the inclined rubber wall, undergoes elastic deformation to absorb and reduce the vibration of the vacuum pump, ultimately achieving the purpose of reducing noise and vibration. Moreover, the vibration damping pad has a simple structure and is easy to assemble. Due to the characteristics of rubber material and appropriate hardness control, the vibration damping pad can be assembled into the metal bracket hole by hand without the need for tools. Furthermore, the vibration damping pad does not significantly change the appearance of the vacuum pump assembly or increase the weight of the vacuum pump assembly, which is in line with the national call for energy conservation and emission reduction. It can also effectively reduce the vibration and noise generated during the operation of the vacuum pump, providing drivers with a more comfortable driving experience. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the shock-absorbing pad of this utility model;

[0016] Figure 3 This is a schematic diagram of the shock-absorbing pad structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the protective sleeve structure of this utility model;

[0018] Figure 5 This is a top view schematic diagram of the shock-absorbing pad of this utility model.

[0019] In the diagram: 1. Shock-absorbing pad; 2. Protective sleeve; 3. Central through hole; 4. Inclined rubber arm; 5. Axial central groove; 101. Metal heat sink; 102. Reinforcing plate; 1021. Outer rubber layer; 1022. Middle rubber layer; 1023. Inner rubber layer; 201. Wear-resistant layer; 202. Support layer; 203. Buffer layer; 1031. Bottom friction layer. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] This utility model discloses a shock-absorbing structure made of rubber, such as Figure 1-5As shown, the device includes a shock-absorbing pad 1. The shock-absorbing pad 1 has a central through hole 3 inside, which is used to pass through a metal fixing bolt and connect to a vacuum pump. The shock-absorbing pad has an inclined rubber arm 4 inside. The shock-absorbing pad 1 has an axial central groove 5 on one side of its outer surface, which is used to fix the shock-absorbing pad 1 to the bracket round hole component. The hardness of the shock-absorbing pad 1 needs to be finally selected according to different users and objective verification results. The shock-absorbing pad 1 needs to be connected to the vacuum pump with a matching bracket and fixing bolt.

[0022] After the shock absorber 1 is connected to the vacuum pump via bracket and fixing bolts, it is fixed to the vehicle chassis frame. The vibration generated during the operation of the vacuum pump is transmitted to the shock absorber 1 through the fixing bolts. The shock absorber 1 as a whole, especially the inclined rubber wall, undergoes elastic deformation to absorb and reduce the vibration of the vacuum pump, ultimately achieving the purpose of reducing noise and vibration.

[0023] Due to the properties of rubber materials and appropriate hardness control, the shock absorber 1 can be assembled into the metal bracket hole by hand without the need for tools. Furthermore, the shock absorber 1 will not significantly change the appearance of the vacuum pump assembly or increase its weight, which is in line with the national call for energy conservation and emission reduction. It can also effectively reduce the vibration and noise generated during the operation of the vacuum pump, providing drivers with a more comfortable driving experience.

[0024] The shock-absorbing pad 1 includes an inner rubber layer 1023, a middle rubber layer 1022 on the outer surface of the inner rubber layer 1023, and an outer rubber layer 1021 on the outer surface of the middle rubber layer 1022. The middle rubber layer 1022 is located between the inner rubber layer 1023 and the outer rubber layer 1021. The outer rubber layer 1021 is made of natural rubber and butadiene rubber. Through complementary material properties and structural optimization, it achieves efficient absorption and energy dissipation of high-frequency vibrations to absorb high-frequency vibrations.

[0025] The middle rubber layer 1022 is made of styrene-butadiene rubber and carbon black, which is used to bear mid-frequency vibration and provide structural support. The inner rubber layer 1023 is made of fluororubber and glass fiber, which is used to suppress low-frequency resonance. A compatibilizer transition layer is added between adjacent rubber layers, and maleic anhydride-grafted SEBS is used to improve the interfacial bonding strength.

[0026] First, the inner rubber layer 1023, the middle rubber layer 1022, and the outer rubber layer 1021 are prepared separately. Then, the inner rubber layer 1023, the middle rubber layer 1022, and the outer rubber layer 1021 are placed into the mold cavity in sequence. The layers are initially bonded by pressure and temperature. Then, the whole thing is vulcanized. Finally, the flash and burrs are removed to ensure a smooth surface.

[0027] The outer surface of the shock-absorbing pad 1 is provided with a protective sleeve 2, which includes a buffer layer 203. The buffer layer 203 is made of foamed polyurethane to absorb low-frequency vibrations. The outer surface of the buffer layer 203 is provided with a support layer 202. The support layer 202 is made of continuous fiber reinforced thermoplastic composite material to improve shear strength and inhibit tear propagation. The outer surface of the support layer 202 is provided with a wear-resistant layer 201. The wear-resistant layer 201 is made of ultrafine grain alumina ceramic and modified polyurethane adhesive, and is made by plasma spraying and laser cladding processes to resist sand and gravel impacts.

[0028] The inner wall of the central through hole 3 is provided with a bottom friction layer 1031, which is a polytetrafluoroethylene coating. The polytetrafluoroethylene coating has an extremely low coefficient of friction, which can significantly reduce the friction force during bolt assembly and enable easy tightening by hand.

[0029] When spraying the polytetrafluoroethylene coating, first wipe the inner wall of the through hole with a lint-free cloth dipped in isopropanol or acetone, repeat 3 times until there is no residue on the surface, immerse in NaOH solution for 30 seconds to neutralize the weak acidity of the rubber surface, select water-based PTFE dispersion for spraying, and let it dry at room temperature for 30 minutes after spraying before entering the curing stage. Curing is done at low temperature. Finally, use a soft brush to remove excess coating to avoid clogging the central through hole 3.

[0030] The shock-absorbing pad has a metal heat sink 101 embedded inside. The metal heat sink 101 is embedded between the rubber middle layer 1022 and the rubber inner layer 1023. The metal heat sink 101 can quickly conduct the heat generated by the vacuum pump to the outside, avoid local overheating of the rubber, and reduce the creep and vulcanization bond breakage caused by high temperature. The metal heat sink 101 acts as a rigid skeleton and improves the overall resistance to compression deformation after being combined with the rubber. The metal sheet and the rubber are bonded together by high temperature vulcanization after being pretreated with adhesive.

[0031] The inclined rubber arm 4 has a reinforcing plate 102 embedded inside. The reinforcing plate 102 is made of aramid fiber woven mesh and is embedded in the middle layer of rubber. The tensile strength of aramid fiber is much higher than that of rubber, which can provide a rigid skeleton for the rubber matrix, suppress shear deformation, and prevent fatigue fracture under repeated shear loads, thus extending service life and improving shear strength.

[0032] Aramid fiber woven mesh disperses local shear stress over a larger area through the cross structure of warp and weft yarns, avoiding stress concentration that could lead to rubber tearing and inhibiting creep of the middle layer rubber under high-frequency vibration. The surface of the aramid fiber is impregnated with a rubber prepreg to enhance the interfacial bonding between the fiber and the rubber. Coupling agents are used to enhance the interfacial adhesion between the fiber and the rubber, preventing delamination.

[0033] The working principle of this utility model is as follows: the shock absorber 1 is connected to the vacuum pump through the bracket and fixing bolts and then fixed to the vehicle chassis frame. The vibration generated by the vacuum pump during operation is transmitted to the shock absorber 1 through the fixing bolts. The shock absorber 1 as a whole, especially the inclined rubber wall, undergoes elastic deformation to absorb and reduce the vibration of the vacuum pump, thereby achieving the purpose of reducing noise and vibration.

[0034] The metal heat sink 101 can quickly conduct the heat generated by the vacuum pump to the outside, avoid local overheating of the rubber, and reduce the creep and vulcanization bond breakage of the rubber caused by high temperature. As a rigid skeleton, the metal heat sink 101 improves the overall resistance to compression deformation after being combined with the rubber.

[0035] The reinforcing sheet 102 is made of aramid fiber woven mesh, which is embedded inside the middle layer of rubber. The tensile strength of aramid fiber is much higher than that of rubber, which can provide a rigid skeleton for the rubber matrix, suppress shear deformation, and prevent fatigue fracture under repeated shear loads, thus extending service life and improving shear strength.

[0036] All of the above-mentioned components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0037] The specific model and specifications of components such as the metal heat sink 101 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method and connection method all adopt the existing technology in this field, so they will not be described in detail here.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing structure made of rubber, comprising a shock-absorbing pad (1), characterized in that: The shock-absorbing pad (1) has a central through hole (3) inside, and the shock-absorbing pad has a diagonal rubber arm (4) inside. The shock-absorbing pad (1) has an axial central groove (5) on one side of its outer surface.

2. The shock-absorbing structure made of rubber material according to claim 1, characterized in that: The shock-absorbing pad (1) includes a rubber inner layer (1023), a rubber middle layer (1022) is provided on the outer surface of the rubber inner layer (1023), and a rubber outer layer (1021) is provided on the outer surface of the rubber middle layer (1022), and the rubber middle layer (1022) is located between the rubber inner layer (1023) and the rubber outer layer (1021).

3. The shock-absorbing structure made of rubber material according to claim 2, characterized in that: The outer surface of the shock-absorbing pad (1) is provided with a protective sleeve (2), the protective sleeve (2) includes a buffer layer (203), the outer surface of the buffer layer (203) is provided with a support layer (202), and the outer surface of the support layer (202) is provided with a wear-resistant layer (201).

4. The shock-absorbing structure made of rubber material according to claim 1, characterized in that: The inner wall of the central through hole (3) is provided with a bottom friction layer (1031).

5. The shock-absorbing structure made of rubber material according to claim 1, characterized in that: The shock-absorbing pad (1) has a metal heat sink (101) embedded inside.

6. The shock-absorbing structure made of rubber material according to claim 1, characterized in that: The inclined rubber arm (4) has a reinforcing plate (102) embedded inside.

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