Sealing washer for vehicle air spring

Abstract

The invention discloses a sealing washer for a vehicle air spring, and belongs to the technical field of sealing washers. The problems that in the prior art, a sealing gasket is poor in sealing effect, and the performance of top rubber can be affected are solved. Comprising a rubber body and a framework which are fixedly connected, the framework is used for supporting the rubber body, a bottom annular structure is arranged at the bottom of the rubber body in a protruding mode, an annular sealing structure is arranged on the inner side of the framework, and the inner diameter of the annular sealing structure is smaller than the outer diameter of a piston rod of the shock absorber. According to the sealing washer for the vehicle air spring, effective sealing can be conducted between the top rubber and the piston rod and between the top rubber and the upper mounting base assembly only through one sealing washer, the sealing effect is good, the number of needed sealing elements is small, and cost is low; the pressure difference between the upper surface and the lower surface of the top rubber is kept consistent, the performance of the top rubber is guaranteed, the performance and stability of the air spring are guaranteed, and the comfort of taking an automobile is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sealing gaskets, and in particular, relates to a sealing gasket for a vehicle air spring. Background Art

[0002] In the automotive industry, air springs are an important suspension component that has a significant impact on the stability and safety of vehicles. Air springs are filled with high-pressure air in a closed container with a variable volume, and use the compressibility of the gas to realize the function of an elastic element. During the driving process of the vehicle, the piston rod and the air spring will have relative movement, and it is necessary to provide a movable high-pressure sealing structure at the contact part between the upper end of the air spring and the piston rod. The traditional structure uses multiple O-rings to seal the top rubber and the upper mounting seat assembly, and the top rubber and the piston rod, and the sealing performance is poor. It is necessary to design multiple O-rings for sealing between the top rubber and the piston rod, and the top rubber and the upper mounting seat assembly, which will cause the lower surface of the top rubber to bear the internal air pressure of the air spring, affecting the performance of the top rubber, affecting the performance of the air spring, and lacking a sealing gasket that can seal between the top rubber and the piston rod, and the top rubber and the upper mounting seat assembly, and avoid the lower surface of the top rubber from bearing the internal air pressure of the air spring, and avoid affecting the performance of the top rubber. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a sealing gasket for vehicle air spring, which has good sealing effect, requires fewer sealing elements and has low cost, so that the pressure difference between the upper and lower surfaces of the top glue remains consistent, thereby ensuring the performance of the top glue.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention discloses a sealing gasket for a vehicle air spring, comprising a colloid and a frame that are fixedly connected, wherein the frame is used to support the colloid, the bottom protrusion of the colloid is provided with a bottom annular structure, and the inner side of the frame is provided with an annular sealing structure, wherein the inner diameter of the annular sealing structure is smaller than the outer diameter of the piston rod of the shock absorber.

[0006] Furthermore, the skeleton is an annular structure made of steel, aluminum alloy or PA66.

[0007] Furthermore, the colloid is an annular structural member made of nitrile rubber, natural rubber, chloroprene rubber or propylene rubber.

[0008] Furthermore, the skeleton is fixed on the top of the colloid by vulcanization.

[0009] Furthermore, the number of the bottom annular structure is at least one.

[0010] Furthermore, an annular sealing lip is provided on the inner wall protrusion of the annular sealing structure.

[0011] Furthermore, the number of the annular sealing lip is at least one.

[0012] Furthermore, the bottom edge protrusion of the colloid is provided with an edge ring structure, and the protrusion height of the edge ring structure is smaller than the protrusion height of the bottom ring structure.

[0013] Furthermore, the top protrusion of the colloid is provided with an annular support structure, and the height of the annular support structure is the same as the vertical distance between the skeleton of the top glue and the bottom surface of the top glue.

[0014] Furthermore, a spring steel wire ring is arranged around the outer side of the annular sealing structure.

[0015] The beneficial effects of the present invention are:

[0016] A sealing gasket for a vehicle air spring provided in the present application is composed of a colloid and a skeleton supporting the colloid. A bottom annular structure is convexly provided at the bottom of the colloid. An annular sealing structure whose inner diameter is smaller than the outer diameter of a piston rod of a shock absorber is provided on the inner side of the skeleton. The sealing gasket is assembled with an upper mounting seat assembly, a top rubber and a piston rod. The sealing gasket and the top rubber are installed in the upper mounting seat assembly. The sealing gasket is fixedly installed in a seat hole of the upper mounting seat assembly by the top rubber and the piston rod using a nut or a fastening assembly. After the top end of the piston rod of the shock absorber passes through the annular sealing structure of the sealing gasket and the center hole of the skeleton of the top rubber, the top rubber is tightened with the top rubber by a nut, the top rubber is in contact with the top surface of the sealing gasket, and the bottom surface of the sealing gasket is in contact with the inner bottom surface of the upper mounting seat assembly. Among them, the bottom annular structure and the upper mounting seat assembly are compressed and deformed, and the bottom annular structure and the upper mounting seat assembly are sealed, so that the sealing gasket and the upper mounting seat assembly are sealed, and then the top rubber and the upper mounting seat assembly are sealed; the inner diameter of the annular sealing structure is smaller than the outer diameter of the piston rod of the shock absorber, and the piston rod sleeve passes through the annular sealing structure, the annular sealing structure and the piston rod are interference fit, the annular sealing structure and the piston rod are sealed, the sealing gasket and the piston rod are sealed, and then the top rubber and the piston rod are sealed. With the cooperation of the bottom annular structure and the annular sealing structure, the top rubber and the piston rod, the top rubber and the upper mounting seat assembly are effectively sealed, the top rubber is in a sealed state and isolated from the internal air pressure of the air spring, the pressure difference between the upper surface and the lower surface of the top rubber is kept consistent, so as to avoid the lower surface of the top rubber being subjected to the internal air pressure of the air spring, resulting in a large pressure difference between the upper surface and the lower surface of the top rubber, affecting the performance of the top rubber, thereby ensuring the performance of the top rubber, and then ensuring the performance and stability of the air spring, thereby improving the comfort of riding in the car. In summary, a sealing gasket for a vehicle air spring in the present application only requires one sealing gasket to effectively seal between the top rubber and the piston rod, and between the top rubber and the upper mounting seat assembly, with good sealing effect, few required sealing elements and low cost; the pressure difference between the upper and lower surfaces of the top rubber is kept consistent, thereby ensuring the performance of the top rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a cross-sectional view of a sealing gasket for a vehicle air spring having an annular support structure provided by an embodiment of the present invention;

[0019] Figure 2 is a cross-sectional view of a sealing gasket for a vehicle air spring without an annular support structure provided by an embodiment of the present invention;

[0020] Figure 3 It is a cross-sectional view of an assembly of a sealing gasket, a top rubber, a piston rod and an upper mounting seat assembly for a vehicle air spring having an annular support structure provided by an embodiment of the present invention.

[0021] Figure numerals: colloid 1, skeleton 2, annular support structure 3, edge annular structure 4, bottom annular structure 5, spring steel wire ring 6, annular sealing structure 7, annular sealing lip 701, upper mounting seat assembly 8, top rubber 9, piston rod 10, fastening assembly 11. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3As shown, this embodiment provides a sealing gasket for a vehicle air spring, including a colloid 1 and a skeleton 2 that are fixedly connected, the skeleton 2 is used to support the colloid 1, the bottom protrusion of the colloid 1 is provided with a bottom annular structure 5, the inner side of the skeleton 2 is provided with an annular sealing structure 7, and the inner diameter of the annular sealing structure 7 is smaller than the outer diameter of the piston rod 10 of the shock absorber. The colloid 1 and the skeleton 2 are annular, and the skeleton 2 is fixed to the top or inside of the colloid 1. The colloid 1 and the skeleton 2 can be chemically bonded and fixed by adhesive or glue, or the colloid 1 and the skeleton 2 can be heated and vulcanized and bonded, or mechanically fixed by screws and nuts. The height of the protrusion of the bottom annular structure 5 is set by the preload of the colloid 1. The fastening assembly 11 is a cap and a retaining ring structure or a cap ring is connected to the internal thread structure of the mounting seat assembly 8 on the external thread or the cap is connected to the mounting seat assembly 8 on the bolt.

[0025] A sealing gasket for a vehicle air spring based on the above structure is composed of a colloid 1 and a skeleton 2 supporting the colloid. A bottom annular structure 5 is convexly provided at the bottom of the colloid 1. An annular sealing structure 7 whose inner diameter is smaller than the outer diameter of a piston rod 10 of a shock absorber is provided on the inner side of the skeleton 2. The sealing gasket is assembled with an upper mounting seat assembly 8, a top rubber 9 and a piston rod 10. The sealing gasket and the top rubber 9 are installed in the upper mounting seat assembly 8. The sealing gasket is fixedly installed in the seat hole of the upper mounting seat assembly 8 by the top rubber 9 and the piston rod 10 using a nut or a fastening assembly 11. After the top end of the piston rod 10 of the shock absorber passes through the annular sealing structure 7 of the sealing gasket and the center hole of the skeleton of the top rubber 9, the top rubber 9 is tightened with the top rubber 9 by tightening the nut with the top end of the piston rod 10. The top rubber 9 is in contact with the top surface of the sealing gasket, and the bottom surface of the sealing gasket is in contact with the inner bottom surface of the upper mounting seat assembly 8. Among them, the bottom annular structure 5 and the upper mounting seat assembly 8 are deformed by pressure, and the bottom annular structure 5 and the upper mounting seat assembly 8 are sealed, so that the sealing gasket and the upper mounting seat assembly 8 are sealed, and then the top rubber 9 and the upper mounting seat assembly 8 are sealed; the inner diameter of the annular sealing structure 7 is smaller than the outer diameter of the piston rod 10 of the shock absorber, and the piston rod 10 is sleeved through the annular sealing structure 7, and the annular sealing structure 7 and the piston rod 10 are interference fit, the annular sealing structure 7 and the piston rod 10 are sealed, the sealing gasket and the piston rod 10 are sealed, and then the top rubber 9 and the piston rod 10 Sealing, with the cooperation of the bottom annular structure 5 and the annular sealing structure 7, the top rubber 9 and the piston rod 10, and the top rubber 9 and the upper mounting seat assembly 8 are effectively sealed. The top rubber 9 is in a sealed state and isolated from the internal air pressure of the air spring. The pressure difference between the upper and lower surfaces of the top rubber 9 is kept consistent, so as to avoid the lower surface of the top rubber 9 being subjected to the internal air pressure of the air spring, resulting in a large pressure difference between the upper and lower surfaces of the top rubber, which affects the performance of the top rubber, thereby ensuring the performance of the top rubber 9, and then ensuring the performance and stability of the air spring, and improving the comfort of riding in the car. In summary, a sealing gasket for a vehicle air spring of the present application only needs one sealing gasket to effectively seal the top rubber 9 and the piston rod 10, and the top rubber 9 and the upper mounting seat assembly 8, with good sealing effect, few sealing elements required, and low cost; the pressure difference between the upper and lower surfaces of the top rubber 9 is kept consistent, thereby ensuring the performance of the top rubber 9. Under the action of the internal pressure of the air spring, the annular sealing structure 7 of the sealing gasket and the piston rod 10 of the shock absorber move axially relative to each other, and the annular sealing structure 7 of the sealing gasket and the piston rod 10 of the shock absorber form a dynamic seal. The amplitude of the relative movement is affected by the shape of the skeleton 2 of the sealing gasket, the performance of the colloid 1 and the size of the internal pressure of the air spring. The outer wall of the sealing gasket is gap-matched or fitted with the inner wall of the upper mounting seat assembly 8. The fastening assembly 11 is arranged on the top of the upper mounting seat assembly 8, and the top glue 9 and the sealing gasket are fixedly installed in the seat hole of the upper mounting seat assembly 8. With the cooperation of the fastening assembly 11, the bottom annular structure 5 and the annular sealing structure 7, the top glue 9 is in an overall sealed state.The bottom annular structure 5 corresponds to the colloid position of the top rubber 9, a first groove opposite to the colloid of the top rubber 9 is set on the frame 2, and the colloid of the top rubber 9 is installed in the first groove, and the inner bottom surface of the upper mounting seat assembly 8 is provided with a second groove opposite to the bottom annular structure 5, and the bottom annular structure 5 is installed in the second groove, supporting the frame 2 to withstand the pressure transmitted by the top rubber colloid, and improving stability. And under the action of the internal air pressure of the air spring, the annular sealing structure 7 and the piston rod 10 fit more closely, and the greater the internal air pressure, the tighter the annular sealing structure 7 and the piston rod 10 fit, and the better the sealing effect.

[0026] The skeleton 2 is an annular structure made of steel, aluminum alloy or PA66.

[0027] The skeleton 2 structure made of steel, aluminum alloy, PA66 or other materials has the characteristics of height and high strength, and is used as a supporting and filling structure, which can better support and fill the colloid 1.

[0028] As an implementable embodiment, the colloid 1 is an annular structural member made of nitrile rubber, natural rubber, chloroprene rubber or propylene rubber.

[0029] The colloid 1 structural parts made of materials such as nitrile rubber, natural rubber, chloroprene rubber, or propylene rubber have the characteristics of excellent elasticity, high temperature resistance, low temperature resistance, and corrosion resistance, and are better used as colloid 1 and then as sealing gaskets for vehicle air springs.

[0030] As an implementation method, Figure 1 , Figure 2 , Figure 3 As shown, the skeleton 2 is fixed on the top of the colloid 1 by vulcanization.

[0031] The skeleton 2 is fixed on the top of the colloid 1, so that the skeleton 2 and the colloid 1 can be bonded and fixed by heating and vulcanization, which has a simple manufacturing operation.

[0032] Wherein, the number of the bottom annular structure 5 is at least one.

[0033] The number of the bottom annular structure 5 is one or more, such as one or two or more integers. The multiple bottom annular structures 5 are arranged in parallel and spaced apart at the bottom of the colloid 1 to enhance the sealing and support of the top glue 9 and the upper mounting seat assembly 8.

[0034] As an implementation method, Figure 1 , Figure 2 , Figure 3 As shown, the inner wall protrusion of the annular sealing structure 7 is provided with an annular sealing lip 701 or a sealing ring.

[0035] The annular sealing lip 701 is used to enhance the sealing between the annular sealing structure 7 and the piston rod 10 of the shock absorber, thereby enhancing the sealing between the top rubber 9 and the piston rod 10 of the shock absorber.

[0036] There is at least one annular sealing lip 701 .

[0037] The number of the annular sealing lips 701 is one or more, such as one or two or more integers, and the multiple annular sealing lips 701 are arranged in parallel and spaced apart on the inner wall of the annular sealing structure 7, further enhancing the sealing between the annular sealing structure 7 and the piston rod 10 of the shock absorber, and then enhancing the sealing between the top rubber 9 and the piston rod 10 of the shock absorber.

[0038] As an implementation method, Figure 1 , Figure 2 , Figure 3 As shown, the bottom edge of the colloid 1 is protruded with an edge annular structure 4 , and the protruding height of the edge annular structure 4 is smaller than the protruding height of the bottom annular structure 5 .

[0039] The sealing gasket is installed in the upper mounting seat assembly 8, and the edge annular structure 4 is pressed and deformed against the inner bottom surface of the upper mounting seat assembly 8, further enhancing the sealing and support of the top rubber 9 and the upper mounting seat assembly 8. The height of the protrusion of the edge annular structure 4 is set by the pre-compression amount of the colloid 1. The outer edge of the skeleton 2 is bent downward to form a skeleton bending part, and the outer edge of the colloid 1 is bent downward to form a colloid bending part that cooperates with the skeleton bending part. The skeleton bending part is coated on the colloid bending part, and the edge annular structure 4 is arranged on the colloid bending part, and the edge annular structure 4 protrudes from the skeleton bending part. The skeleton bending part is inclined and chamfered away from the colloid bending part, and the edge annular structure 4 is arranged on the inclined surface of the colloid bending part.

[0040] As an implementation method, Figure 1 , Figure 3 As shown, the top protrusion of the colloid 1 is provided with an annular support structure 3, and the height of the annular support structure 3 is the same as the vertical distance between the skeleton of the top glue 9 and the bottom surface of the top glue 9.

[0041] After the sealing gasket is assembled with the upper mounting seat assembly 8, the top rubber 9 and the piston rod 10, the top of the annular support structure 3 fits or contacts the skeleton of the top rubber 9, supporting the annular sealing structure 7, preventing the annular sealing structure 7 of the sealing gasket and the piston rod 10 of the shock absorber from axial relative movement under the action of the internal pressure of the air spring. The annular sealing structure 7 of the sealing gasket and the piston rod 10 of the shock absorber form a static seal, further enhancing the sealing performance and stability of the sealing gasket. The annular support structure 3 and the colloid 1 can be made by integral molding, the inner diameter of the annular support structure 3 is slightly larger than the outer diameter of the piston rod 10 of the shock absorber, the piston rod 10 of the shock absorber is sleeved in the annular support structure 3, and the piston rod 10 of the shock absorber is gap-matched with the annular support structure 3. A support skeleton is arranged inside the cylindrical annular support structure 3 to enhance the strength, rigidity and stability of the annular support structure 3.

[0042] As an implementation method, Figure 1 , Figure 2 , Figure 3 As shown, a spring steel wire ring 6 is arranged around the outer side of the annular sealing structure 7 .

[0043] An annular installation groove is circumferentially arranged on the outer side wall of the annular sealing structure 7 , and the spring wire ring 6 is sleeved in the annular installation groove, applying radial inward pre-pressure to the annular sealing structure 7 , thereby improving the stability of the annular sealing structure 7 .

[0044] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing gasket for a vehicle air spring, characterized in that: The invention comprises a colloid (1) and a frame (2) which are fixedly connected, wherein the frame (2) is used to support the colloid (1), a bottom protrusion of the colloid (1) is provided with a bottom annular structure (5), and an annular sealing structure (7) is provided on the inner side of the frame (2), wherein the inner diameter of the annular sealing structure (7) is smaller than the outer diameter of the piston rod (10) of the shock absorber.

2. A sealing gasket for a vehicle air spring according to claim 1, characterized in that: The skeleton (2) is an annular structural member made of steel, aluminum alloy or PA66.

3. A sealing gasket for a vehicle air spring according to claim 2, characterized in that: The colloid (1) is an annular structural member made of nitrile rubber, natural rubber, chloroprene rubber or propylene rubber.

4. A sealing gasket for a vehicle air spring according to claim 3, characterized in that: The skeleton (2) is fixed on the top of the colloid (1) by vulcanization.

5. The sealing gasket for a vehicle air spring according to claim 1, characterized in that: The number of the bottom annular structure (5) is at least one.

6. The sealing gasket for a vehicle air spring according to claim 1, characterized in that: The inner wall protrusion of the annular sealing structure (7) is provided with an annular sealing lip (701).

7. A sealing gasket for a vehicle air spring according to claim 6, characterized in that: The number of the annular sealing lip (701) is at least one.

8. The sealing gasket for a vehicle air spring according to claim 1, characterized in that: The bottom edge of the colloid (1) is protruded with an edge annular structure (4), and the protrusion height of the edge annular structure (4) is smaller than the protrusion height of the bottom annular structure (5).

9. A sealing gasket for a vehicle air spring according to any one of claims 1 to 8, characterized in that: The top protrusion of the colloid (1) is provided with an annular support structure (3), and the height of the annular support structure (3) is the same as the vertical distance between the skeleton of the top glue (9) and the bottom surface of the top glue (9).

10. A sealing gasket for a vehicle air spring according to claim 9, characterized in that: A spring steel wire ring (6) is arranged around the outer side of the annular sealing structure (7).

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