Rigidity-adjustable air spring piston

Abstract

The utility model provides an air spring piston with adjustable rigidity, which comprises a connecting part and a piston cylinder body, and the connecting part is fixed at the lower end of the piston cylinder body; a cylindrical barrel is further fixed to the connecting part and arranged in the piston cylinder body, the upper end of the cylindrical barrel is flush with the upper end of the piston cylinder body, the cylindrical barrel divides an inner cavity of the piston cylinder body into a first cavity and a second cavity which are arranged inside and outside, and the first cavity and the second cavity are independent of each other. According to the utility model, the two cavities are combined to form different volumes, and the volume is adjustable, so that the air spring has different rigidity requirements, the generality of the product is improved, only one set of mold is needed for production, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to an air spring piston with adjustable stiffness. Background Art

[0002] An air spring is a device that uses air pressure to provide elastic support and is widely used in automotive suspension systems, industrial equipment, and other applications requiring shock absorption. To provide greater comfort and stability, stiffness adjustment is necessary. The air spring piston is a key component inside the air spring, located within the airbag, responsible for converting gas pressure into mechanical force. The movement of the air spring piston allows the airbag to stretch or compress, thereby adjusting the stiffness and height of the spring. Currently, air spring pistons are primarily single-chamber structures. The volume of the air spring piston is not adjustable, resulting in poor versatility and an inability to meet the different stiffness requirements of air springs. Existing single-chamber air spring pistons require the volume of the piston to be changed to meet different stiffness requirements. Therefore, different molds are required during manufacturing, and the molds are not universal, resulting in high production costs for air spring pistons. Summary of the Invention

[0003] In view of the above problems, the utility model provides an air spring piston with adjustable stiffness.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An air spring piston with adjustable stiffness comprises a connecting portion and a piston cylinder body, wherein the connecting portion is fixed to the lower end of the piston cylinder body;

[0006] A cylindrical barrel is also fixed to the connecting portion, and the cylindrical barrel is arranged in the piston cylinder body. The upper end of the cylindrical barrel is flush with the upper end of the piston cylinder body. The cylindrical barrel divides the inner cavity of the piston cylinder body into a first cavity and a second cavity arranged inside and outside. The first cavity and the second cavity are independent of each other. An airway hole and a conversion hole are provided on the connecting portion. The conversion hole is connected to the first cavity, and the airway hole is connected to the second cavity.

[0007] An outer side wall of the upper portion of the piston cylinder body is provided with an annular protrusion arranged around the circumference of the piston cylinder body.

[0008] Furthermore, a connecting slot is provided at the upper end of the cylindrical tube, and the connecting slot is a strip-shaped notch provided along the length direction of the cylindrical tube.

[0009] Furthermore, the outer side surface of the cylindrical tube is connected to a plurality of connecting ribs, the outer ends of the connecting ribs are fixedly connected to the inner wall of the piston cylinder body, the cylindrical tube is concentrically arranged with the piston cylinder body, the connecting ribs are equidistantly arranged along the circumference of the cylindrical tube, and the connecting ribs divide the second cavity into multiple cavity chambers.

[0010] Furthermore, the connecting slot and the connecting rib are staggered, and a partition is fixed to the outer wall of the cylindrical tube corresponding to the position of the connecting slot. The partition is arranged along the length direction of the cylindrical tube, and the upper end of the partition is flush with the bottom of the connecting slot.

[0011] Furthermore, the connecting ribs are arranged outside the cylindrical tube in a central radial pattern.

[0012] Furthermore, the connecting part includes a short cylinder, a connecting plate and a connecting column. The outer side of the short cylinder is provided with a pressing tooth. The upper end of the short cylinder is concentrically fixed to the piston cylinder body. The connecting plate is fixed to the lower end of the short cylinder. The connecting column is concentrically fixed on the connecting plate. A conversion hole is provided on the connecting column.

[0013] Furthermore, the outer side of the connecting column is connected to the inner cavity wall of the short tube through reinforcing ribs, and the reinforcing ribs are arranged at equal intervals around the circumference of the short tube.

[0014] Furthermore, the lower end of the cylindrical tube is concentrically fixed to the upper surface of the connecting plate.

[0015] Furthermore, the piston cylinder body, the connecting portion and the cylindrical tube are integrally connected.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention is designed with two inner and outer cavity volumes, and the two cavity volumes can be independent or connected together by adding a groove. Different volumes are combined to achieve volume adjustment, thereby adjusting the stiffness of the air spring piston, thereby achieving different stiffness requirements for the air spring, and improving the versatility of the present invention. (2) During the production and manufacturing of the present invention, only one set of molds is needed, and the connection of the two cavities is achieved by adding a pad to adjust the structure of the control connection slot, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an air spring piston with adjustable stiffness according to the present invention;

[0018] Figure 2 This is a structural diagram of an air spring piston with adjustable stiffness according to the present invention;

[0019] Figure 3The utility model is a structural schematic diagram of an air spring assembly with an air spring piston having adjustable stiffness. DETAILED DESCRIPTION

[0020] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0021] Please refer to Figure 1 、 Figure 2 An embodiment of the present invention provides an air spring piston with adjustable stiffness, comprising a connecting portion 100 and a piston cylinder body 200. The piston cylinder body 200 is a cylinder structure that ensures that the piston can better control the compression or extension of the airbag during operation, thereby preventing the air spring from falling out. The connecting portion 100 is fixed to the lower end of the piston cylinder body 200, and the airbag skin is fixed to the outside of the connecting portion 100, thereby achieving compression or extension of the airbag and ensuring normal operation of the air spring.

[0022] A cylindrical tube 300 is also fixed on the connecting part 100, and the cylindrical tube 300 is arranged in the piston cylinder body 200. The upper end of the cylindrical tube 300 is flush with the upper end of the piston cylinder body 200, and the cylindrical tube 300 divides the inner cavity of the piston cylinder body into a first cavity 210 and a second cavity 220 arranged inside and outside, and the first cavity 210 and the second cavity 220 are independent of each other; an airway hole 121 and a conversion hole 131 are provided on the connecting part, and the conversion hole 131 is connected to the first cavity, and the airway hole 121 is connected to the second cavity; by designing two independent cavities, the volume of the first cavity 210 can be used alone or in combination to form different volumes as needed, and the stiffness of the air spring piston can be adjusted by adjusting the cavity volume of the air spring piston.

[0023] The outer wall of the upper portion of the piston cylinder body 200 is provided with an annular protrusion 230 arranged around the circumference of the piston cylinder body. By designing the annular protrusion 230, the telescopic airbag is fixed to the piston cylinder body through a fixing clamp, ensuring a firm connection and good sealing between the telescopic airbag and the piston cylinder body.

[0024] Furthermore, a connecting slot 310 is provided at the upper end of the cylindrical barrel 300. This connecting slot 310 is a strip-shaped notch extending along the length of the cylindrical barrel. This connecting slot 310 connects the first cavity 210 and the second cavity 220, ensuring that the piston volume of the present invention is the sum of the volumes of the first cavity 210 and the second cavity 220, thus meeting the required rigidity.

[0025] Furthermore, the outer side of the cylindrical tube 300 is connected with a plurality of connecting ribs 320, the outer ends of the connecting ribs 320 are fixedly connected to the inner side wall of the piston cylinder body 200, the cylindrical tube 300 and the piston cylinder body 200 are arranged concentrically, and the connecting ribs 320 are arranged equidistantly along the circumference of the cylindrical tube 300, and the connecting ribs 320 divide the second cavity 220 into a plurality of cavity chambers. The connecting slots 310 and the connecting ribs 320 are staggered. It is ensured that the connecting slots 310 can connect the first cavity 210 with the separated cavity chambers respectively. Figure 3 As shown, the air spring assembly includes components such as an air spring piston, an upper cover 1, a stiffness conversion valve 2, a telescopic airbag 3, and a bladder skin 4. The upper cover 1 is fixed above the air spring piston, and the telescopic airbag 3 is fixed to the outside of the air spring piston. An air inlet 11 is provided on the side of the upper cover 1, and a bladder skin 4 is fixed to the outside of the connecting portion. The stiffness conversion valve 2 is installed in the conversion hole 131. The stiffness conversion valve 2 is an electric valve, and the opening and closing of the conversion hole 131 are controlled by the on-off control of the stiffness conversion valve 2. At this time, the air spring assembly includes a chamber 1 formed by the bladder skin and a chamber 2 formed by the cavity combination of the utility model. The principle of adjustable stiffness is as follows:

[0026] Air enters through the air inlet and enters chamber 1 through the piston airway. The stiffness conversion valve is closed. At this time, the air spring assembly will have a large stiffness (volume = chamber 1).

[0027] Air enters through the air inlet, passes through the piston airway into chamber 1, and the stiffness conversion valve opens, allowing air to enter chamber 2. At this point, the air spring assembly has a small stiffness (volume = chamber 1 + chamber 2). Adjustable stiffness is primarily achieved by varying the piston volume. By providing multiple cavities, the present invention allows for the number of cavities connected by the connecting slots to be controlled as needed. A variety of chamber volumes can be designed to meet varying air spring stiffness requirements, enabling stiffness adjustment and providing piston versatility.

[0028] A partition 330 is also fixed to the outer wall of the cylindrical barrel 300 at the location corresponding to the connecting slot 310. The partition 330 is arranged along the length of the cylindrical barrel 300, and the upper end of the partition 330 is flush with the bottom of the connecting slot 310. The design of the partition 330 ensures the strength of the utility model, prevents deformation of the mold cavity, and extends the service life of the utility model.

[0029] Furthermore, the connecting ribs 320 are radially arranged outside the cylindrical tube 300. The structure is beautiful and the support strength is strong, ensuring the service life of the utility model. The volume of the second cavity 220 is evenly divided by the evenly arranged connecting ribs 320, making the force more uniform and avoiding cavity deformation.

[0030] Furthermore, the connecting portion 100 includes a short cylinder 110, a connecting plate 120 and a connecting column 130. The outer side of the short cylinder 110 is provided with a pressing tooth to ensure that the bladder skin can be connected and fixed firmly through the pressing tooth during use, further ensuring the sealing between the bladder skin and the piston. The upper end of the short cylinder 110 is concentrically fixed to the piston cylinder body 200, the connecting plate 120 is fixed to the lower end of the short cylinder 110, and the connecting column 130 is concentrically fixed on the connecting plate 120. The airway hole 121 is provided on the connecting plate, and a conversion hole 131 is provided on the connecting column 130. It is ensured that the output end of the movable part is fixed through the conversion hole 131, and that the movable part drives the piston to move, thereby realizing the normal operation of the air piston.

[0031] Furthermore, the outer side of the connecting post 130 is connected to the inner wall of the short tube 110 via reinforcing ribs 132, and the reinforcing ribs 132 are equidistantly arranged around the circumference of the short tube 110. This ensures the connection strength between the connecting post 130, the short tube 110, and the connecting plate, prevents falling off and deformation, and ensures the quality and service life of the present invention.

[0032] The lower end of the cylindrical tube 300 is concentrically fixed to the upper surface of the connecting plate 120. This ensures the connection strength between the cylindrical tube 300 and the connecting portion 100. Furthermore, the first cavity 210 and the second cavity 220 separated by the cylindrical tube 300 are not connected at the bottom and can only be connected through the connecting slot. This adjusts the piston volume and controls the piston stiffness to meet the different stiffness requirements of the air spring.

[0033] Furthermore, the piston cylinder body 200, the connecting portion 100 and the cylindrical tube 300 are integrally connected. Through mold integration, the connection strength of each component is guaranteed, the appearance is beautiful, the connection quality is good, cracking is avoided, and the service life is long. The piston has two cavities: a first cavity 210 and a second cavity 220, which correspond to different volumes respectively. The two cavities can be connected by adding a connecting slot 310, thereby achieving the purpose of adjusting the piston volume and realizing the adjustment of different stiffness of the air spring assembly. Only one set of molds is needed, and the structure of the gasket is added to achieve the connection of the two cavities. The mold has high versatility and reduces costs.

[0034] The present invention has been described with reference to the above embodiments. However, these embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. An air spring piston with adjustable stiffness, characterized in that: It comprises a connecting portion and a piston cylinder body, wherein the connecting portion is fixed to the lower end of the piston cylinder body; A cylindrical barrel is also fixed to the connecting portion, and the cylindrical barrel is arranged in the piston cylinder body. The upper end of the cylindrical barrel is flush with the upper end of the piston cylinder body. The cylindrical barrel divides the inner cavity of the piston cylinder body into a first cavity and a second cavity arranged inside and outside. The first cavity and the second cavity are independent of each other. An airway hole and a conversion hole are provided on the connecting portion. The conversion hole is connected to the first cavity, and the airway hole is connected to the second cavity. An outer side wall of the upper portion of the piston cylinder body is provided with an annular protrusion arranged around the circumference of the piston cylinder body.

2. The air spring piston with adjustable stiffness according to claim 1, characterized in that: A connecting slot is provided at the upper end of the cylindrical tube, and the connecting slot is a strip-shaped notch provided along the length direction of the cylindrical tube.

3. The air spring piston with adjustable stiffness according to claim 2, characterized in that: The outer side surface of the cylindrical tube is connected to a plurality of connecting ribs, the outer ends of the connecting ribs are fixedly connected to the inner wall of the piston cylinder body, the cylindrical tube and the piston cylinder body are concentrically arranged, the connecting ribs are equidistantly arranged along the circumference of the cylindrical tube, the connecting ribs divide the second cavity into a plurality of cavity chambers, and the connecting slots and the connecting ribs are staggered.

4. The air spring piston with adjustable stiffness according to claim 3, characterized in that: A partition is also fixed to the outer side wall of the cylindrical tube corresponding to the position of the connecting slot. The partition is arranged along the length direction of the cylindrical tube, and the upper end of the partition is flush with the bottom of the connecting slot.

5. The air spring piston with adjustable stiffness according to claim 3, characterized in that: The connecting ribs are arranged outside the cylindrical tube in a central radial pattern.

6. The air spring piston with adjustable stiffness according to claim 1, characterized in that: The connecting part includes a short cylinder, a connecting plate and a connecting column. The outer side of the short cylinder is provided with a pressing tooth. The upper end of the short cylinder is concentrically fixed to the piston cylinder body. The connecting plate is fixed to the lower end of the short cylinder. The connecting column is concentrically fixed on the connecting plate. A conversion hole is provided on the connecting column.

7. The air spring piston with adjustable stiffness according to claim 6, characterized in that: The outer side of the connecting column is connected to the inner cavity wall of the short cylinder through reinforcing ribs, and the reinforcing ribs are arranged at equal intervals around the circumference of the short cylinder.

8. The air spring piston with adjustable stiffness according to claim 6, characterized in that: The lower end of the cylindrical barrel is concentrically fixed to the upper surface of the connecting plate.

9. The air spring piston with adjustable stiffness according to claim 1, characterized in that: The piston cylinder body, the connecting portion and the cylindrical barrel are integrally connected.

Images