Air spring piston

Abstract

The utility model provides an air spring piston which comprises a piston body and an electromagnetic valve. The piston body comprises an upper piston and a lower piston, and the lower end of the upper piston and the upper end of the lower piston are fixed and circumferentially sealed; an annular extending part extending downwards is arranged on the inner edge of the upper piston, a vent hole is formed in the middle of the lower end of the lower piston, the upper end of the electromagnetic valve is connected with the annular extending part and is sealed in the circumferential direction, and the lower end of the electromagnetic valve is connected with the inner bottom, located at the vent hole, of the lower piston and is sealed in the circumferential direction. An auxiliary air chamber of the air spring is defined by the upper piston, the lower piston and the electromagnetic valve; a supporting ring made of a metal material is embedded in the inner circumferential wall of the lower end of the lower piston, and the inner circumferential wall of the supporting ring coincides with the inner circumferential wall of the lower end of the lower piston; the lower end of the lower piston is used for being inserted into the upper end of a leather bag assembly in the air spring and fastened to the upper end of the leather bag assembly. Reliability and firmness of connection between the upper end of the leather bag assembly and the lower end of the piston body can be improved.

Description

Technical Field

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

[0002] With the rapid development of modern industry, air springs, due to their unique performance advantages, have found widespread application in numerous fields, including automotive, machinery manufacturing, and aerospace. In the automotive sector, air springs can significantly improve vehicle ride smoothness and handling stability, providing a more comfortable experience for drivers and passengers. In machinery manufacturing, they help reduce equipment vibration and improve machining precision and production efficiency.

[0003] As an important component in the air spring, the air spring piston is circumferentially sealed and connected to the upper end of the bladder assembly in the air spring. In the existing air spring structure, the lower end of the piston is inserted into the upper end of the bladder assembly, and the upper end of the bladder assembly is clamped to the lower end of the piston via a clamping ring. However, since the air spring piston is made of plastic material, when the upper end of the bladder assembly is clamped to the lower end of the piston via a clamping ring, the lower end of the air spring piston is prone to deformation, which will affect the reliability of the connection between the upper end of the bladder assembly and the lower end of the air spring piston. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an air spring piston, which can improve the reliability and firmness of the connection between the upper end of the bladder component and the lower end of the piston body.

[0005] The utility model provides an air spring piston, comprising a piston body and a solenoid valve; the piston body comprises an upper piston and a lower piston, the lower end of the upper piston is fixed to the upper end of the lower piston and is circumferentially sealed; an annular extension portion extending downward is provided at the inner edge of the upper piston, a vent hole is provided in the middle of the lower end of the lower piston, the upper end of the solenoid valve is connected to the annular extension portion and is circumferentially sealed, and the lower end of the solenoid valve is connected to the inner bottom of the lower piston located at the position of the vent hole and is circumferentially sealed; the upper piston, the lower piston and the solenoid valve form an auxiliary air chamber of the air spring, and the solenoid valve is used to control the opening and closing of the auxiliary air chamber and the vent hole; a support ring made of metal material is embedded on the inner circumferential wall of the lower end of the lower piston, and the inner circumferential wall of the support ring coincides with the inner circumferential wall of the lower end of the lower piston; the lower end of the lower piston is used to be inserted into the upper end of a bladder assembly in the air spring and fastened to the upper end of the bladder assembly.

[0006] The utility model can effectively avoid deformation of the lower end of the lower piston when the upper end of the bladder assembly is subsequently clamped to the lower end of the lower piston through a clamping ring after embedding a support ring made of metal material on the inner circumferential wall of the lower end of the lower piston, that is, it can improve the reliability and firmness of the connection between the upper end of the bladder assembly and the lower end of the piston body.

[0007] In one possible embodiment, a downwardly protruding boss is provided in the middle of the lower end of the lower piston, a groove is formed on the inner side of the boss, a vent is provided at the bottom of the groove, the lower end of the solenoid valve is inserted into the groove and is circumferentially sealed with the groove; a plurality of circumferentially spaced reinforcing ribs are integrally formed on the outer wall of the boss, and the plurality of reinforcing ribs are connected to the lower piston located on the outer side of the boss; after adopting this structure, since the lower end of the solenoid valve is inserted into the groove and is circumferentially sealed with the groove, the lower end of the solenoid valve can be reliably connected to the inner bottom of the lower piston and circumferentially sealed, and has the advantage of convenient connection. In addition, under the action of a plurality of reinforcing ribs, the structural strength of the boss itself can be improved, and the connection strength between the boss and the lower piston can be improved.

[0008] In one possible embodiment, a first sealing ring is embedded on the outer wall of the lower end of the solenoid valve; the first sealing ring is tightly sealed against the outer wall of the lower end of the solenoid valve and the inner wall of the groove; by adopting this structure, the first sealing ring can reliably seal the gap between the outer wall of the lower end of the solenoid valve and the inner wall of the groove, and has the advantage of a simple sealing structure.

[0009] In a possible embodiment, an annular step is provided on the outer wall of the upper end of the solenoid valve, a support ring is embedded in the annular step, an annular groove is provided on the inner wall of the annular extension, a retaining spring is mounted on the annular groove, and the inner edge of the retaining spring abuts against the outer edge of the upper end of the support ring to press the solenoid valve against the inner bottom of the lower piston; by adopting this structure, under the action of the retaining spring and the support ring, the solenoid valve can be reliably pressed against the inner bottom of the lower piston, that is, the solenoid valve can be reliably fastened in the piston body.

[0010] In one possible embodiment, a second sealing ring is embedded on the outer wall of the upper part of the solenoid valve, and the second sealing ring is tightly sealed against the outer wall of the upper part of the solenoid valve and the inner wall of the annular extension. By adopting this structure, under the action of the second sealing ring, the second sealing ring can reliably seal the gap between the upper part of the solenoid valve and the annular extension, and has the advantage of a simple sealing structure.

[0011] In one possible embodiment, the lower end of the upper piston and the upper end of the lower piston are hot-melt welded and circumferentially sealed; by adopting this structure, the upper piston and the lower piston can be conveniently and reliably fixed together, and the lower end of the upper piston and the upper end of the lower piston can reliably achieve the purpose of circumferential sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a first three-dimensional structural diagram of the utility model;

[0013] Figure 2This is a second three-dimensional structural diagram of the utility model;

[0014] Figure 3 It is a schematic cross-sectional structural diagram of the present utility model. DETAILED DESCRIPTION

[0015] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0016] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0017] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0018] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] See also Figure 1-3As shown, the embodiment of the present application discloses an air spring piston, including a piston body 1 and a solenoid valve 2; the piston body 1 includes an upper piston 11 and a lower piston 12, the lower end of the upper piston 11 is fixed to the upper end of the lower piston 12 and is circumferentially sealed; an annular extension 111 extending downward is provided at the inner edge of the upper piston 11, and a vent hole 121 is provided in the middle of the lower end of the lower piston 12, the upper end of the solenoid valve 2 is connected to the annular extension 111 and is circumferentially sealed, and the lower end of the solenoid valve 2 is connected to the vent hole 121. The inner bottom of the lower piston 12 at the position is connected and circumferentially sealed; the upper piston 11, the lower piston 12 and the solenoid valve 2 form the auxiliary air chamber 3 of the air spring, and the solenoid valve 2 is used to control the opening and closing of the auxiliary air chamber 3 and the vent hole 121; a support ring 4 made of metal material is embedded on the inner circumferential wall of the lower end of the lower piston 12, and the inner circumferential wall of the support ring 4 coincides with the inner circumferential wall of the lower end of the lower piston 12; the lower end of the lower piston 12 is used to be inserted into the upper end of the bladder assembly in the air spring and fastened to the upper end of the bladder assembly.

[0020] The present invention embeds a support ring made of metal material on the inner circumferential wall of the lower end of the lower piston, and then when the upper end of the bladder assembly is clamped to the lower end of the lower piston through a clamping ring, it can effectively avoid the deformation of the lower end of the lower piston, that is, it can improve the reliability and firmness of the connection between the upper end of the bladder assembly and the lower end of the piston body; in addition, after adopting the above structure, the present invention can, when the solenoid valve is opened, the auxiliary air chamber can be connected with the main air chamber in the air spring through the air vent, thereby increasing the inner cavity of the air spring and reducing the stiffness of the air spring; when the solenoid valve is closed, the auxiliary air chamber and the main air chamber in the air spring can be separated by the solenoid valve, thereby reducing the inner cavity of the air spring and increasing the stiffness of the air spring; in the above content, the control of the stiffness of the air spring is the existing technology on the market, so it will not be described here.

[0021] A downwardly protruding boss 122 is provided in the middle of the lower end of the lower piston 12, and a groove 123 is formed on the inner side of the boss 122. The vent 121 is provided at the bottom of the groove 123. The lower end of the solenoid valve 2 is inserted into the groove 123 and is circumferentially sealed with the groove 123; a plurality of circumferentially spaced reinforcing ribs 124 are integrally formed on the outer wall of the boss 122, and the plurality of reinforcing ribs 124 are connected to the lower piston 12 located on the outer side of the boss 122; by adopting this structure, since the lower end of the solenoid valve is inserted into the groove and is circumferentially sealed with the groove, the lower end of the solenoid valve can be reliably connected to the inner bottom of the lower piston and circumferentially sealed, and has the advantage of convenient connection. In addition, under the action of a plurality of reinforcing ribs, the structural strength of the boss itself can be improved, and the connection strength between the boss and the lower piston can be improved.

[0022] A first sealing ring 5 is embedded in the outer wall of the lower end of the solenoid valve 2; the first sealing ring 5 is tightly sealed against the outer wall of the lower end of the solenoid valve 2 and the inner wall of the groove 123; by adopting this structure, the first sealing ring can reliably seal the gap between the outer wall of the lower end of the solenoid valve and the inner wall of the groove, and has the advantage of a simple sealing structure.

[0023] An annular step 21 is provided on the outer wall of the upper end of the solenoid valve 2, and a support ring 6 is embedded in the annular step 21. An annular groove 112 is provided on the inner wall of the annular extension 111, and a retaining spring 7 is clamped on the annular groove 112. The inner edge of the retaining spring 7 abuts against the outer edge of the upper end of the support ring 6 to press the solenoid valve 2 against the inner bottom of the lower piston 12. By adopting this structure, under the action of the retaining spring and the support ring, the solenoid valve can be reliably pressed against the inner bottom of the lower piston, that is, the solenoid valve can be reliably fastened in the piston body.

[0024] A second sealing ring 8 is embedded on the outer wall of the upper part of the solenoid valve 2, and the second sealing ring 8 is tightly sealed to the outer wall of the upper part of the solenoid valve 2 and the inner wall of the annular extension 111; by adopting this structure, under the action of the second sealing ring, the second sealing ring can reliably seal the gap between the upper part of the solenoid valve and the annular extension, and has the advantage of a simple sealing structure.

[0025] The lower end of the upper piston 11 and the upper end of the lower piston 12 are hot-melt welded and circumferentially sealed; by adopting this structure, the upper piston and the lower piston can be conveniently and reliably fixed together, and the lower end of the upper piston and the upper end of the lower piston can reliably achieve the purpose of circumferential sealing.

[0026] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An air spring piston, comprising a piston body (1) and a solenoid valve (2); the piston body (1) comprises an upper piston (11) and a lower piston (12), the lower end of the upper piston (11) is fixed to the upper end of the lower piston (12) and is circumferentially sealed; an annular extension portion (111) extending downward is provided at the inner edge of the upper piston (11), a vent hole (121) is provided in the middle of the lower end of the lower piston (12), the upper end of the solenoid valve (2) is connected to the annular extension portion (111) and is circumferentially sealed, and the lower end of the solenoid valve (2) is connected to the inner bottom of the lower piston (12) located at the position of the vent hole (121) and is circumferentially sealed; the upper piston (11), the lower piston (12) and the solenoid valve (2) form a secondary air chamber (3) of the air spring, and the solenoid valve (2) is used to control the connection and disconnection of the secondary air chamber (3) and the vent hole (121); characterized in that: A support ring (4) made of metal material is embedded on the inner peripheral wall of the lower end of the lower piston (12), and the inner peripheral wall of the support ring (4) coincides with the inner peripheral wall of the lower end of the lower piston (12); the lower end of the lower piston (12) is used to be inserted into the upper end of the bladder assembly in the air spring and fastened to the upper end of the bladder assembly.

2. The air spring piston according to claim 1, characterized in that: A downwardly protruding boss (122) is provided in the middle of the lower end of the lower piston (12), a groove (123) is formed on the inner side of the boss (122), the vent hole (121) is provided at the bottom of the groove (123), the lower end of the solenoid valve (2) is inserted into the groove (123) and is circumferentially sealed with the groove (123); a plurality of circumferentially spaced reinforcing ribs (124) are integrally formed on the outer side wall of the boss (122), and the plurality of reinforcing ribs (124) are integrally connected to the lower piston (12) located on the outer side of the boss (122).

3. The air spring piston according to claim 2, characterized in that: A first sealing ring (5) is embedded on the outer wall of the lower end of the solenoid valve (2); the first sealing ring (5) is tightly sealed against the outer wall of the lower end of the solenoid valve (2) and the inner wall of the groove (123).

4. The air spring piston according to any one of claims 1 to 3, characterized in that: An annular step (21) is provided on the outer wall of the upper end of the solenoid valve (2), a support ring (6) is embedded in the annular step (21), an annular groove (112) is provided on the inner wall of the annular extension portion (111), a retaining spring (7) is retained in the annular groove (112), and the inner edge of the retaining spring (7) abuts against the outer edge of the upper end of the support ring (6) to press the solenoid valve (2) against the inner bottom of the lower piston (12).

5. The air spring piston according to claim 4, characterized in that: A second sealing ring (8) is embedded on the outer side wall of the upper portion of the solenoid valve (2), and the second sealing ring (8) is tightly sealed against the outer side wall of the upper portion of the solenoid valve (2) and the inner side wall of the annular extension portion (111).

6. The air spring piston according to claim 1, 2, 3 or 5, characterized in that: The lower end of the upper piston (11) and the upper end of the lower piston (12) are heat-melted and circumferentially sealed.

Images