Sealing washer for vehicle air spring

Abstract

The utility model 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 installation 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 utility model belongs to the technical field of sealing washers, and in particular relates to a sealing washers for vehicle air springs. 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 formed by filling a closed container with variable volume with high-pressure air, and utilize the compressibility of the gas to realize the function of an elastic element. During vehicle driving, the piston rod and the air spring will have relative movement, requiring a movable high-pressure sealing structure to be provided at the contact portion between the upper end of the air spring and the piston rod. The traditional structure uses multiple O-rings to seal between the top glue and the upper mounting seat assembly, and between the top glue and the piston rod, but the sealing performance is poor. The need to design multiple O-rings for sealing between the top glue and the piston rod, and between the top glue and the upper mounting seat assembly will cause the lower surface of the top glue to be subjected to the internal air pressure of the air spring, affecting the performance of the top glue. There is a lack of a sealing gasket that can seal between the top glue and the piston rod, and between the top glue and the upper mounting seat assembly, and prevent the lower surface of the top glue from being subjected to the internal air pressure of the air spring, thereby avoiding affecting the performance of the top glue. Utility Model Content

[0003] In order to solve the above problems, the utility model 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 purpose, the technical solution adopted by the utility model is:

[0005] The utility model discloses a sealing gasket for a vehicle air spring, comprising a fixedly connected colloid and a skeleton, wherein the skeleton 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 skeleton is provided with an annular sealing structure, 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 structural member 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 of the colloid is convexly provided with an edge annular structure, and the convex height of the edge annular structure is smaller than the convex height of the bottom annular 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 utility model are:

[0016] The present application provides a sealing gasket for a vehicle air spring, which consists of a colloid and a skeleton supporting the colloid. A bottom annular structure is protruded from the bottom of the colloid, and an annular sealing structure with an inner diameter smaller than the outer diameter of the piston rod of the shock absorber is provided on the inner side of the skeleton. The sealing gasket is assembled with the upper mounting seat assembly, the top glue and the piston rod, and the sealing gasket and the top glue are installed in the upper mounting seat assembly. The sealing gasket is fixed to the seat hole of the upper mounting seat assembly by the top glue 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 glue, it is fastened to the top glue by tightening a nut with the top end of the piston rod. The top glue 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. The cam is pressed against the piston rod, and the ... In summary, the sealing gasket for a vehicle air spring of 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0018] Figure 1 This 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 utility model;

[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 utility model;

[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 with 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 glue 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 embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] The present invention will be further described below with reference to 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, comprising a fixedly connected colloid 1 and a skeleton 2, the skeleton 2 being used to support the colloid 1, the bottom protrusion of the colloid 1 being provided with a bottom annular structure 5, the inner side of the skeleton 2 being provided with an annular sealing structure 7, the inner diameter of the annular sealing structure 7 being smaller than the outer diameter of the piston rod 10 of the shock absorber. The colloid 1 and the skeleton 2 are in the form of circular rings, the skeleton 2 being fixed to the top or inside of the colloid 1, the colloid 1 and the skeleton 2 can be chemically bonded and fixed using an adhesive or glue, or the colloid 1 and the skeleton 2 can be bonded and fixed by heat vulcanization, or mechanically fixed using 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 retaining spring structure or a cap ring connected to an internally threaded upper mounting seat assembly 8 or a cap and a bolt upper mounting seat assembly 8.

[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 protruded from the bottom of the colloid 1, and an annular sealing structure 7 with an inner diameter smaller than the outer diameter of the piston rod 10 of the shock absorber is provided on the inner side of the skeleton 2. The sealing gasket is assembled with the upper mounting seat assembly 8, the top glue 9 and the piston rod 10. The sealing gasket and the top glue 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 glue 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 glue 9, it is fastened to the top glue 9 by tightening a nut with the top end of the piston rod 10. The top glue 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 compressed and deformed, 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 glue 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, and the annular sealing structure 7 and the piston rod 10 are sealed, and the sealing gasket and the piston rod 10 are sealed, and then the top glue 9 and the piston rod 10 are sealed. 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, which prevents the lower surface of the top rubber 9 from being subjected to the internal air pressure of the air spring, causing a large pressure difference between the upper and lower surfaces of the top rubber to affect 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, the 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 required sealing elements, and low cost; the pressure difference between the upper and lower surfaces of the top rubber 9 is kept consistent, 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 undergo axial relative movement, forming a dynamic seal. The amplitude of this relative movement is affected by the shape of the sealing gasket skeleton 2, the properties of the colloid 1, and the magnitude of the internal pressure of the air spring. The outer wall of the sealing gasket is loosely matched or fitted with the inner wall of the upper mounting seat assembly 8. A fastening assembly 11 is disposed on the top of the upper mounting seat assembly 8, securing the top glue 9 and the sealing gasket within 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 integrally sealed state.The bottom annular structure 5 corresponds to the position of the top rubber 9. A first groove is provided on the frame 2, opposite to the top rubber 9. The top rubber 9 is installed in the first groove. The inner bottom surface of the upper mounting seat assembly 8 is provided with a second groove, opposite to the bottom annular structure 5. The bottom annular structure 5 is installed in the second groove. The support frame 2 withstands the pressure transmitted by the top rubber and improves stability. Under the action of the internal air pressure of the air spring, the annular sealing structure 7 and the piston rod 10 fit more tightly. The greater the internal air pressure, the tighter the fit between the annular sealing structure 7 and the piston rod 10, and the better the sealing effect.

[0026] The skeleton 2 is an annular structural member 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 to better support and fill the colloid 1.

[0028] As an implementation method, 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 implementable 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] There is at least one bottom annular structure 5 .

[0033] The number of the bottom annular structures 5 is one or more, such as one or two or more integers. 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 between the top glue 9 and the upper mounting seat assembly 8.

[0034] As an implementable method, Figure 1 、 Figure 2 、 Figure 3 As shown, the inner wall 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 annular sealing lips 701 is one or more, such as one or two or more integers, and 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 glue 9 and the piston rod 10 of the shock absorber.

[0038] As an implementable method, Figure 1 、 Figure 2 、 Figure 3 As shown, the bottom edge of the colloid 1 is raised to be provided with an edge annular structure 4 , and the raised height of the edge annular structure 4 is smaller than the raised 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 contacts the inner bottom surface of the upper mounting seat assembly 8 and is compressed and deformed, further enhancing the sealing and support of the top glue 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 portion, and the outer edge of the colloid 1 is bent downward to form a colloid bending portion that cooperates with the skeleton bending portion. The skeleton bending portion is coated on the colloid bending portion, and the edge annular structure 4 is set on the colloid bending portion, and the edge annular structure 4 protrudes from the skeleton bending portion. The skeleton bending portion is tilted and chamfered away from the colloid bending portion, and the edge annular structure 4 is set on the inclined surface of the colloid bending portion.

[0040] As an implementable 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 assembly 8, the top rubber 9, and the piston rod 10, the top of the annular support structure 3 fits or contacts the framework of the top rubber 9, supporting the annular sealing structure 7 and preventing axial relative movement between the annular sealing structure 7 and the shock absorber's piston rod 10 under the action of the internal pressure of the air spring. The annular sealing structure 7 and the shock absorber's piston rod 10 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 integrally molded. The inner diameter of the annular support structure 3 is slightly larger than the outer diameter of the shock absorber's piston rod 10. The shock absorber's piston rod 10 is sleeved within the annular support structure 3, and the shock absorber's piston rod 10 and the annular support structure 3 have a clearance fit. A support framework is provided within the cylindrical annular support structure 3 to enhance the strength, rigidity, and stability of the annular support structure 3.

[0042] As an implementable 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 mounting groove is circumferentially provided on the outer side wall of the annular sealing structure 7 , and the spring wire ring 6 is sleeved in the annular mounting groove, applying radial inward pre-pressure to the annular sealing structure 7 to improve the stability of the annular sealing structure 7 .

[0044] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field can easily think of changes or replacements 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 skeleton (2) which are fixedly connected, wherein the skeleton (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 skeleton (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. The 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. The 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: An annular sealing lip (701) is provided on the inner wall of the annular sealing structure (7).

7. The 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 convexly provided with an edge annular structure (4), and the convex height of the edge annular structure (4) is smaller than the convex 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. The 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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