Air spring shock absorber

Abstract

The utility model discloses an air spring shock absorber which comprises an air spring and a shock absorber assembly assembled with the air spring, the air spring comprises a mounting seat connected with a height valve assembly and a cylinder sleeve connected with the mounting seat, a piston barrel connected with a piston and a piston rod is arranged in the cylinder sleeve, one end of the piston rod is connected with an end cover, and the other end of the piston rod is connected with a piston rod. The installation seat is connected with an air bag through a fixing ring, a plurality of positioning protruding rings are arranged on the inner side of the end, close to the end cover, of the air bag, the end cover is provided with a plurality of positioning grooves matched with the positioning protruding rings, a locking ring screwed on the periphery of the air bag is arranged on the periphery of the end cover, a threaded groove is formed in the outer side of the air bag, and the locking ring is provided with an internal thread matched with the threaded groove. A retaining ring abutting against the locking ring is further arranged on the periphery of the end cover. The air bag can be stably locked and hermetically connected with the end cover, one side of the positioning groove is sequentially provided with the limiting bulge and the locking groove, the limiting bulge and the locking groove are matched with the air bag in a stepped manner, the air bag and the end cover are further locked, and the sealing performance of the air bag and the end cover is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shock absorber technical field especially relates to an air spring shock absorber. BACKGROUND

[0002] With the popularization of commercial vehicles and the development of science and technology intelligent, in addition to meeting the traditional target function, driving safety, strength and durability, people also put forward higher requirements on the light weight, driving comfort and noise reduction of commercial vehicles. Among them, the road conditions involved in the actual driving process are complex, and the road impact vibration will be transmitted to the vehicle body, affecting the driving comfort, so the damping performance requirements of the vehicle shock absorber are higher and higher. Air spring shock absorber as a kind of excellent high efficiency damping device, has been widely used in the field of automobile, rail transportation, industrial machinery, etc., by adding compressed air in flexible sealed container, using the nonlinear restoring force of air compression to realize vibration isolation and buffering effect, to reduce the degree of up and down of the vehicle body, and then improve the driving comfort.

[0003] At present, the common air spring shock absorber mainly adopts single air bag type, multi-layer air bag type and membrane type structure design, by integrating the height valve in the air spring shock absorber, with the increase or decrease of the working height of air spring, the air spring internal inflation and exhaust are realized, and the damping effect and reliability are higher. The existing air spring shock absorber is generally fixed by clamping the air bag on the side wall of the end cover through the clamping ring, relying on the axial width and clamping area of the clamping ring to fix the air bag, however, the air bag as the most important part in the air spring shock absorber, in the long-term driving of the vehicle, the air spring shock absorber is always in motion, the air bag is always in the state of continuous expansion and contraction, the air bag continuously pulls the clamping ring connection of the end cover side wall, after long-term use, the connection between the clamping ring and the air bag is easy to loosen, which can cause air bag leakage and affect the service life of the air spring shock absorber. UTILITY MODEL CONTENTS

[0004] In order to solve the technical problems that the air bag continuously pulls the clamping ring connection of the end cover side wall, the connection between the clamping ring and the air bag is easy to loosen after long-term use, which can cause air bag leakage and affect the service life of the air spring shock absorber, the utility model provides the following technical scheme.

[0005] The utility model relates to an air spring shock absorber, including air spring and with air spring's shock absorber assembly of assembly, air spring includes the mounting seat of height valve assembly connection and the cylinder liner connected with the mounting seat, the piston cylinder that is equipped with the piston and piston rod is connected in the cylinder liner, the end cover is connected with the piston rod one end, the mounting seat is connected with the gasbag through the fixed ring, the gasbag is equipped with a plurality of positioning convex ring in the inboard of one end close to the end cover, the end cover is equipped with a plurality of positioning recesses matched with the positioning convex ring, the periphery of end cover is equipped with the locking ring that screws in the periphery of gasbag, the gasbag outside is equipped with the thread groove, the locking ring is equipped with the internal thread matched with the thread groove, the periphery of end cover is still equipped with the stop ring that abuts with the locking ring.

[0006] As a further technical scheme, the periphery of the end cover is provided with a limiting convex ring, the gasbag is provided with a protruding part matched with the limiting convex ring, and the protruding part abuts against the locking ring.

[0007] As a further technical scheme, the end cover is provided with a locking groove, and the periphery of the locking groove is provided with a locking steel ring for locking the gasbag in the locking groove.

[0008] As a further technical scheme, the limiting convex ring and the locking groove are both chamfered and frosted.

[0009] As a further technical scheme, the thread groove and the internal thread are both trapezoidal thread structures.

[0010] As a further technical scheme, the inner side of the fixed ring is provided with an elastic sealing ring piece for closing the periphery of the gasbag.

[0011] The utility model discloses a gasbag and end cover are equipped with positioning convex ring and the positioning recess matched with positioning convex ring respectively, and the periphery of gasbag is equipped with the locking ring, and the internal thread of locking ring is matched with the thread groove of gasbag, can lock and seal the connection with end cover with gasbag stably, improves the stability of gasbag in long -term use. And the positioning recess of end cover side is equipped with limiting protruding and locking groove in proper order, and they are matched with gasbag step by step, further lock the gasbag with end cover, prevent the gasbag from loosening and prevent the gasbag from leaking at the same time, improve the sealing performance of gasbag and end cover. ACCURACY OF DRAWINGS

[0012] Figure 1 It is the plane cut structure schematic diagram of the utility model air spring shock absorber;

[0013] Figure 2 It is Figure 1 The enlarged schematic diagram of A part in

[0014] In the figure: 1-air spring; 2-shock absorber assembly; 3-mounting seat; 4-air bag; 401-positioning convex ring; 402-threaded groove; 403-protruding part; 5-height valve assembly; 6-end cover; 601-positioning groove; 602-limiting protrusion; 603-locking groove; 7-locking ring; 701-internal thread; 8-locking steel ring; 9-retaining ring; 10-cylinder sleeve; 11-piston cylinder; 12-piston; 13-piston rod; 14-fixing ring. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. It should be noted that the examples in the utility model and the features in the examples can be combined with each other without conflict.

[0016] In the description of the utility model, it should be understood that the terms “upper”, “lower” are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms “first”, “second” and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the utility model, unless otherwise specified, the meaning of “multiple” is two or more.

[0017] As shown in Figure 1 and Figure 2 The utility model discloses an air spring shock absorber, including air spring 1 and with air spring 1 assembly shock absorber assembly 2, air spring 1 includes the mounting seat 3 that is connected with height valve assembly 5, and with mounting seat 3 connection cylinder sleeve 10. The air bag 4 is connected to the outside of the mounting seat 3 through the fixing ring 14, the inside of the fixing ring 14 is equipped with the elastic sealing ring piece that will seal the air bag 4 periphery, can seal the air bag 4 periphery with mounting seat 3 completely connected.

[0018] The air bag 4 is an elastic body structure and is used in cooperation with the shock absorber assembly 2 to mainly bear and dampen. The height valve assembly 5 is in communication with the inside of the air bag 4 and is connected with an external air source on the vehicle, and can inflate and deflate the air bag 4. The cylinder sleeve 10 is internally provided with a piston cylinder 11 connected with a piston 12 and a piston rod 13, one end of the piston rod 13 is connected with the end cover 6, when the vehicle body is subjected to pressure, the end cover 6 moves with the piston rod 13, the air bag 4 expands and shrinks to reduce the vibration and up-and-down pitching degree of the vehicle body. The height valve assembly 5 and the shock absorber assembly 2 adopt existing structures, other unillustrated sealing rings, inflation ports and connecting bolts and other structures of the utility model all adopt existing technologies, and will not be described herein.

[0019] In a preferred embodiment, the air bag 4 is internally provided with a plurality of positioning convex rings 401 close to one end of the end cover 6, the positioning convex rings 401 are integrally formed with the air bag 4. The outer wall of the end cover 6 is provided with a plurality of positioning concave grooves 601 matched with the positioning convex rings 401, during assembly, the positioning convex rings 401 are clamped into the positioning concave grooves 601. The outer periphery of the end cover 6 is provided with a locking ring 7 screwed on the outer periphery of the air bag 4, the locking ring 7 is a rigid structure, the outer side of the air bag 4 is provided with a threaded groove 402, the locking ring 7 is provided with an internal thread 701 matched with the threaded groove 402, through the screw fastening of the internal thread 701 and the threaded groove 402, the locking ring 7 can tightly abut the positioning convex rings 401 in the positioning concave grooves 601, improving the connection stability and sealing performance of the air bag 4 and the end cover 6. The threaded groove 402 and the internal thread 701 preferably adopt trapezoidal thread structures, preventing the force during the continuous expansion and contraction of the air bag 4 from causing abrasion to the air bag 4.

[0020] In a preferred embodiment, the outer periphery of the end cover 6 is further provided with a retreat-stop ring 9 abutting against the locking ring 7, the retreat-stop ring 9 can prevent the locking ring 7 from being separated from the air bag 4. The outer periphery of the side of the end cover 6 away from the retreat-stop ring 9 is provided with a limiting convex ring 602, the air bag 4 is provided with a protruding portion 403 matched with the limiting convex ring 602, after the locking ring 7 is screwed on the outer periphery of the air bag 4, the protruding portion 403 abuts against the locking ring 7, thereby the locking ring 7 is limited between the protruding portion 403 and the retreat-stop ring 9, preventing the vibration and the pulling force of the air bag 4 from causing adverse effects.

[0021] In a preferred embodiment, the outer periphery of the end cover 6 is provided with a locking groove 603, the locking groove 603 is provided with a locking steel ring 8 locking the air bag 4 in the locking groove 603, the limiting convex ring 602 and the locking groove 603 are both chamfered and frosted, reducing the pulling damage of the air bag 4 while increasing the friction force between the air bag 4 and the end cover 6, the limiting convex ring 602 and the locking groove 603 are both in stepped locking cooperation with the air bag 4, further locking the air bag 4 and the end cover 6, improving the sealing performance of the air bag 4 and the end cover 6.

[0022] The preferred specific embodiments and examples of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments and examples, and various changes or equivalent replacements can be made within the knowledge range possessed by the person skilled in the art without departing from the concept of the utility model, therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the application belong to the range protected by the utility model.

Claims

1. An air spring shock absorber, comprising an air spring (1) and a shock absorber assembly (2) assembled with the air spring (1), wherein the air spring (1) comprises a mounting seat (3) connected to a height valve assembly (5) and a cylinder sleeve (10) connected to the mounting seat (3), wherein a piston cylinder (11) connected to a piston (12) and a piston rod (13) is provided in the cylinder sleeve (10), and one end of the piston rod (13) is connected to an end cap (6), and wherein: The mounting base (3) is connected with an air bag (4) through a fixing ring (14), the air bag (4) is provided with a plurality of positioning convex rings (401) on the inner side of one end close to the end cover (6), the end cover (6) is provided with a plurality of positioning grooves (601) matched with the positioning convex rings (401), the outer periphery of the end cover (6) is provided with a locking ring (7) screwed on the outer periphery of the air bag (4), the outer side of the air bag (4) is provided with a threaded groove (402), the locking ring (7) is provided with an internal thread (701) matched with the threaded groove (402), and the outer periphery of the end cover (6) is further provided with a retreat-stop ring (9) abutting against the locking ring (7).

2. The air spring shock absorber of claim 1, wherein: The outer periphery of the end cover (6) is provided with a limiting convex ring (602), the air bag (4) is provided with a convex part (403) matched with the limiting convex ring (602), and the convex part (403) is in abutting contact with the locking ring (7).

3. The air spring shock absorber of claim 2, wherein: The end cover (6) is provided with a locking groove (603), and the outer periphery of the locking groove (603) is provided with a locking steel ring (8) for locking the air bag (4) in the locking groove (603).

4. The air spring shock absorber of claim 3, wherein: The limiting convex ring (602) and the locking groove (603) are both chamfered and frosted.

5. The air spring shock absorber of claim 1, wherein: The threaded groove (402) and the internal thread (701) both adopt trapezoidal thread structures.

6. The air spring shock absorber of claim 1, wherein: The inner side of the fixing ring (14) is provided with an elastic sealing ring piece for sealing the outer periphery of the air bag (4).

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