Volume-adjustable air spring

Abstract

The utility model provides a volume-adjustable air spring. The volume-adjustable air spring comprises a piston, a bag skin assembly and a lower end cover, the upper end of the bag skin assembly and the lower end of the piston are fixed and sealed in the circumferential direction, the lower end of the bag skin assembly and the upper end of the lower end cover are fixed and sealed in the circumferential direction, and an inner cavity of the air spring is defined by the piston, the bag skin assembly and the lower end cover. The air spring further comprises a sealing cover and a lining block. The sealing cover is detachably connected in an inner hole of the piston and is peripherally sealed with the piston; the lining block is arranged in the inner cavity and is detachably connected with the lower end of the sealing cover; by adopting the structure, after the lining blocks with different sizes are replaced, the volume of the inner cavity of the air spring can be changed, namely, the volume of the inner cavity of the air spring can be adjusted, so that the rigidity of the air spring can be adjusted according to requirements, and the universality of the air spring can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, and in particular to an air spring with adjustable volume. 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] However, in the existing air spring structure, the volume of the inner cavity of the air spring is fixed after production, that is, there is a disadvantage that the stiffness of the air spring cannot be adjusted, that is, there is a disadvantage that the air spring has poor versatility. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an air spring with adjustable volume, which has the advantage of adjustable stiffness, thereby improving the versatility of the air spring.

[0005] The utility model provides an air spring with adjustable volume, comprising a piston, a bladder skin assembly and a lower end cover; the upper end of the bladder skin assembly is fixed to the lower end of the piston and circumferentially sealed, the lower end of the bladder skin assembly is fixed to the upper end of the lower end cover and circumferentially sealed, and the piston, the bladder skin assembly and the lower end cover form an inner cavity of the air spring; the air spring also includes a sealing cover and an inner liner block; the sealing cover is detachably connected to the inner hole of the piston and is circumferentially sealed with the piston, and the inner liner block is arranged in the inner cavity and is detachably connected to the lower end of the sealing cover.

[0006] By adopting the above structure, the present invention can change the volume of the inner cavity of the air spring when replacing the inner lining blocks of different sizes, that is, it can adjust the volume of the inner cavity of the air spring, thereby adjusting the stiffness of the air spring according to needs, thereby improving the versatility of the air spring.

[0007] In one possible embodiment, an annular step is provided on the hole wall of the inner hole of the piston, and an annular ridge is provided on the outer wall of the upper end of the sealing cover, the annular ridge is supported on the annular step, and the annular ridge is fixed to the annular step by a plurality of screws distributed at circumferential intervals; after adopting this structure, when the sealing cover and the piston are connected and fixed, the annular ridge can be supported on the annular step, thereby being able to provide reliable support for the sealing cover, and since the annular ridge is fixed to the annular step by a plurality of screws distributed at circumferential intervals, the sealing cover and the piston can be reliably fixed; in addition, when the plurality of screws are removed, the sealing cover can be easily separated from the piston.

[0008] In one possible embodiment, a limiting groove is provided on one side of the annular convex edge, and a limiting block corresponding to the limiting groove is provided on the hole wall of the inner hole of the piston, and the limiting groove and the limiting block are engaged with each other; after adopting this structure, under the cooperation of the limiting groove and the limiting block, when the sealing cover and the piston are assembled, the limiting groove can be engaged with the limiting block, thereby realizing circumferential limitation and positioning of the sealing cover and the piston, that is, it can bring convenience to the assembly of the sealing cover and the piston.

[0009] In one possible embodiment, a sealing ring is embedded in the outer wall of the lower end of the piston, and the sealing ring is tightly sealed against the sealing cover and the wall of the inner hole of the piston; by adopting this structure, after the sealing cover is assembled into the inner hole of the piston, the sealing ring can be tightly sealed against the sealing cover and the wall of the inner hole of the piston, thereby enabling the sealing ring to reliably seal the gap between the sealing cover and the inner hole of the piston.

[0010] In one possible embodiment, a boss is provided in the middle of the upper end of the sealing cover; after the boss is provided in the middle of the upper end of the sealing cover, after the sealing cover is released from the fixed state with the piston, the boss can be clamped under the action of the boss, thereby facilitating the removal of the sealing cover from the inner hole of the piston.

[0011] In one possible embodiment, a through hole is vertically provided in the middle of the inner liner block, and a bolt is passed through the through hole from bottom to top, the upper end of the bolt is threadedly connected to the lower end of the sealing cover, and the inner liner block is fixed to the lower end of the sealing cover by the bolt; after adopting this structure, the inner liner block can be reliably fixed to the lower end of the sealing cover under the action of the bolt, and when the bolt is separated from the sealing cover, the inner liner block can be easily removed from the lower end of the sealing cover; in addition, when the volume of the air spring needs to be changed, the inner liner blocks of different sizes can be replaced and fixed to the lower end of the sealing cover by bolts of corresponding sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the utility model;

[0014] Figure 3 It is a schematic diagram of a partially exploded three-dimensional structure 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 1-3 As shown, an embodiment of the present application discloses an air spring with adjustable volume, comprising a piston 1, a bladder skin assembly 2 and a lower end cover 3; the upper end of the bladder skin assembly 2 is fixed to the lower end of the piston 1 and circumferentially sealed, the lower end of the bladder skin assembly 2 is fixed to the upper end of the lower end cover 3 and circumferentially sealed, the piston 1, the bladder skin assembly 2 and the lower end cover 3 form an inner cavity 4 of the air spring; the air spring also includes a sealing cover 5 and an inner liner block 6; the sealing cover 5 is detachably connected to the inner hole 11 of the piston 1 and is circumferentially sealed with the piston 1, and the inner liner block 6 is arranged in the inner cavity 4 and is detachably connected to the lower end of the sealing cover 5.

[0020] An annular step 12 is provided on the hole wall of the inner hole 11 of the piston 1, and an annular ridge 51 is provided on the outer wall of the upper end of the sealing cover 5. The annular ridge 51 is supported on the annular step 12, and the annular ridge 51 is fixed to the annular step 12 by a number of screws distributed at circumferential intervals. After adopting this structure, when the sealing cover and the piston are connected and fixed, the annular ridge can be supported on the annular step, thereby playing a reliable supporting role for the sealing cover, and since the annular ridge is fixed to the annular step by a number of screws distributed at circumferential intervals, the sealing cover and the piston can be reliably fixed. In addition, when the several screws are removed, the sealing cover can be easily separated from the piston.

[0021] A limiting groove 52 is provided on one side of the annular convex edge 51, and a limiting block 13 corresponding to the limiting groove 52 is provided on the hole wall of the inner hole 11 of the piston 1, and the limiting groove 52 is engaged with the limiting block 13; after adopting this structure, under the cooperation of the limiting groove and the limiting block, when the sealing cover and the piston are assembled, the limiting groove can be engaged with the limiting block, thereby realizing the circumferential limitation and positioning of the sealing cover and the piston, that is, it can bring convenience to the assembly of the sealing cover and the piston.

[0022] A sealing ring 7 is embedded in the outer wall of the lower end of the piston 1, and the sealing ring 7 is tightly sealed against the sealing cover 5 and the wall of the inner hole 11 of the piston 1; by adopting this structure, after the sealing cover is assembled into the inner hole of the piston, the sealing ring can tightly seal the sealing cover and the wall of the inner hole of the piston, thereby enabling the sealing ring to reliably seal the gap between the sealing cover and the inner hole of the piston.

[0023] A boss 53 is provided in the middle of the upper end of the sealing cover 5; after the boss is provided in the middle of the upper end of the sealing cover, after the sealing cover is released from the fixed state with the piston, the boss can be clamped under the action of the boss, thereby facilitating the removal of the sealing cover from the inner hole of the piston.

[0024] A through hole 61 is vertically provided in the middle of the inner liner block 6, and a bolt 8 is passed through the through hole 61 from bottom to top. The upper end of the bolt 8 is threadedly connected to the lower end of the sealing cover 5, and the inner liner block 6 is fixed to the lower end of the sealing cover 5 by the bolt 8; after adopting this structure, the inner liner block can be reliably fixed to the lower end of the sealing cover under the action of the bolt, and when the bolt is separated from the sealing cover, the inner liner block can be easily removed from the lower end of the sealing cover; in addition, when the volume of the air spring needs to be changed, the inner liner blocks of different sizes can be replaced and fixed to the lower end of the sealing cover by bolts of corresponding sizes.

[0025] 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. A volume-adjustable air spring, comprising a piston (1), a bladder skin assembly (2), and a lower end cover (3); the upper end of the bladder skin assembly (2) is fixed to the lower end of the piston (1) and circumferentially sealed, the lower end of the bladder skin assembly (2) is fixed to the upper end of the lower end cover (3) and circumferentially sealed, and the piston (1), the bladder skin assembly (2), and the lower end cover (3) enclose an inner cavity (4) of the air spring; characterized in that: The air spring further comprises a sealing cover (5) and an inner liner (6); the sealing cover (5) is detachably connected to the inner hole (11) of the piston (1) and is circumferentially sealed with the piston (1); the inner liner (6) is arranged in the inner cavity (4) and is detachably connected to the lower end of the sealing cover (5).

2. The volume-adjustable air spring according to claim 1, characterized in that: An annular step (12) is provided on the hole wall of the inner hole (11) of the piston (1), and an annular convex edge (51) is provided on the outer wall of the upper end of the sealing cover (5). The annular convex edge (51) is supported on the annular step (12), and the annular convex edge (51) is fixed to the annular step (12) by a plurality of screws distributed at circumferential intervals.

3. The volume-adjustable air spring according to claim 2, characterized in that: A limiting groove (52) is provided on one side of the annular convex edge (51), and a limiting block (13) corresponding to the limiting groove (52) is provided on the hole wall of the inner hole (11) of the piston (1), and the limiting groove (52) is engaged with the limiting block (13).

4. The volume-adjustable air spring according to any one of claims 1 to 3, characterized in that: A sealing ring (7) is embedded on the outer wall of the lower end of the piston (1), and the sealing ring (7) is tightly sealed with the sealing cover (5) and the hole wall of the inner hole (11) of the piston (1).

5. The volume-adjustable air spring according to claim 4, characterized in that: A boss (53) is provided in the middle of the upper end of the sealing cover (5).

6. The volume-adjustable air spring according to claim 1, characterized in that: A through hole (61) is vertically provided in the middle of the inner lining block (6), and a bolt (8) is passed through the through hole (61) from bottom to top. The upper end of the bolt (8) is threadedly connected to the lower end of the sealing cover (5), and the inner lining block (6) is fixed to the lower end of the sealing cover (5) through the bolt (8).

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