Air spring assembly

Abstract

The utility model is applicable to the technical field of piston sealing, and provides an air spring assembly, which comprises a piston, a detention ring and an air bag, the piston comprises a main body and a fixed part, the air bag is arranged on the fixed part, the detention ring is sleeved on the air bag, the fixed part comprises a column body, crests are arranged on the column body at equal intervals, and the crests are arranged on the column body. The distance between the crests ranges from 1.5 mm to 2.5 mm, the angle between the crests ranges from 60 degrees to 90 degrees, a step face is arranged at one end of the column body, the angle between the step face and the crests ranges from 90 degrees to 120 degrees, the crests are in the shape of an inverted triangle, and when the inflated air bag tends to move, the crests are in the shape of the inverted triangle. The fixing part prevents the air bag from moving in the opposite direction, the pulling-out force of the air bag is increased, the top end arc of the crest is set to be phi 0.2 mm, the diameter of the step face is larger than that of the crest, and the effects of preventing air from overflowing, improving the sealing performance and increasing the pulling-out force are achieved in cooperation with the buckling and pressing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to air spring technical field more specifically, it relates to an air spring assembly. BACKGROUND

[0002] Air spring as a kind of high-efficiency elastic device based on air pressure principle, gradually replaces traditional mechanical spring and becomes the core shock-absorbing component in high-end equipment field.The essence is the interaction of precise braided rubber air bag and high-pressure gas, realize flexible support and energy dissipation under dynamic load.

[0003] At present, the air spring is generally sealed by the clamping device at one end of the upper cover and the air bag, and then the other end of the piston and the air bag are sealed by the clamping device, and in the working process of the air spring, the air bag and other parts are tightly clamped together, in order to increase the sealing performance and the air bag pull-off force, the parts matched with the air bag are usually provided with anti-skid grooves to increase the air tightness and durability of the air spring as a whole, and the anti-skid groove teeth of the upper cover end and the piston end of the general air spring assembly are mostly in the shape of convex semicircle or trapezoidal.

[0004] However, this structure has limited vertical sliding resistance to the air bag during the movement of the air spring, and cannot effectively prevent the air bag from being pulled out, and the air bag has the risk of being pulled out;On the other hand, from the point of view of air flow, this structure has limited effect on sealing performance, and cannot be completely sealed, and has the risk of air leakage.

[0005] Therefore, the present application provides an air spring assembly. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an air spring assembly.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An air spring assembly, comprising a piston, a clamping ring and an air bag, the piston comprising a main body and a fixed part, the air bag being arranged on the fixed part, the clamping ring being sleeved on the air bag, the fixed part comprising a column body, equidistantly arranged with tooth tops on the column body, the distance between the tooth tops being 1.5-2.5mm, the angle between the tooth tops being 60°-90°, one end of the column body being provided with a stepped surface, the angle between the stepped surface and the tooth top being 90°-120°.

[0009] The utility model is further provided as follows: the shape of the tooth top is inverted triangular.

[0010] The utility model is further provided as follows: the top end arc of the tooth top is φ0.2mm.

[0011] The utility model further sets up: the diameter of step surface is greater than the diameter of tooth top.

[0012] The utility model further sets up: the number of tooth top is six.

[0013] The utility model further sets up: still include shock absorber and sealing structure, the sealing structure includes sealing ring, piston patch and piston base, piston patch and sealing ring are sequentially covered in shock absorber, the piston is covered in shock absorber, piston patch and sealing ring are set up between shock absorber and piston.

[0014] The utility model further sets up: the outside of piston is covered with dust cover.

[0015] The utility model further sets up: the lower surface of piston patch is butt joint with the upper surface of piston base.

[0016] The utility model further sets up: the lower surface of piston is butt joint with the upper surface of piston base.

[0017] Summarized above, the present application includes following at least one beneficial technical effect:

[0018] 1, by setting up the angle between two tooth tops 60 °-90 °, the angle between step surface and tooth top is 90 °-120 °, the shape of tooth top is inverted triangle, when the air bag after inflation has the trend of movement, the fixed part prevents the air bag from moving from the opposite direction, increases the air bag pull-off force, reaches the effect of preventing air overflow, increases the sealing performance.

[0019] 2, by setting up the top end arc of tooth top is φ0.2mm, the diameter of step surface is greater than the diameter of tooth top, cooperates buckling ring, when buckling ring is buckled tightly, tooth top and step surface cooperate and limit the movement of buckling ring, reached the effect of increasing pull-off force. DRAWINGS

[0020] Figure 1 It is the overall structure schematic drawing of an air spring assembly in the utility model.

[0021] Figure 2 It is Figure 1 Partial explosion structure schematic drawing.

[0022] Figure 3 It is partial explosion structure schematic drawing of 2.

[0023] Figure 4 It is Figure 1 Top view.

[0024] Figure 5 It is Figure 4A-A direction section view.

[0025] Figure 6 The whole structure of the piston is shown schematically.

[0026] Figure 7 The whole structure of the piston is shown schematically. Figure 6 The enlarged structure of the B area is shown schematically.

[0027] Explanation of reference signs:

[0028] 1, shock absorber; 2, dust cover; 3, air bag; 4, piston; 41, main body; 42, fixed part; 421, step surface; 422, tooth top; 423, column body; 5, cap; 6, clamping ring; 7, sealing structure; 71, sealing ring; 72, piston patch; 73, piston base. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0031] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] The present application provides the following technical solutions:

[0033] Referring to Figures 1 to 3 An air spring assembly includes a shock absorber 1, a sealing structure 7 sleeved on the shock absorber 1, and a piston 4 sleeved on the shock absorber 1, the sealing structure 7 includes a piston base 73, a piston patch 72 and a sealing ring 71, the piston patch 72 is arranged between the piston base 73 and the sealing ring 71, and the piston patch 72 and the sealing ring 71 are located between the shock absorber 1 and the piston 4.

[0034] Referring to Figure 5The lower surface of the piston 4 abuts against the upper surface of the piston base 73, the piston patch 72 is sleeved on the outer wall of the shock absorber 1, the sealing ring 71 is sleeved on the outer wall of the shock absorber 1, the lower surface of the sealing ring 71 abuts against the upper surface of the piston patch 72, the outer side of the piston 4 is sleeved with the dust cover 2, the bottom of the dust cover 2 abuts against the upper surface of the piston base 73, the shape of the dust cover 2 is matched with the piston 4, the inner wall of the piston 4 is matched with the outer wall of the piston patch 72, and the piston base 73 is welded on the outer wall of the shock absorber 1.

[0035] The outer diameter of the sealing ring 71 is greater than the outer diameter of the piston patch 72, the bottom outer diameter of the piston 4 is smaller than the outer diameter of the piston base 73, the top of the piston 4 is provided with threads, the inside of the dust cover 2 is not hollow structure, the dust cover 2 is matched and installed on the piston base 73 with the piston 4, and the sealing ring 71 is used for sealing between the piston base 73 and the piston 4.

[0036] The piston base 73 and the piston patch 72 adopt a split assembly structure, and the piston patch 72 is made of injection molding material, so that the weight is reduced and the cost is reduced.

[0037] The lower surface of the piston 4 abuts against the upper surface of the piston base 73.

[0038] Referring to Figures 4 to 7 The air spring assembly further comprises a clamping ring 6 and an air bag 3, the piston 4 comprises a main body 41 and a fixed part 42, the air bag 3 is arranged on the fixed part 42, the clamping ring 6 is sleeved on the air bag 3, the fixed part 42 comprises a column body 423, a plurality of crests 422 are arranged at equal intervals on the column body 423, the distance between the crests 422 is 1.5-2.5mm, the angle between the crests 422 is 60°-90°, and one end of the column body 423 is provided with a stepped surface 421, and the angle between the stepped surface 421 and the crest 422 is 90°-120°.

[0039] The air bag 3 is matched with the fixed part 42, and then the air bag 3 is pressed tightly through the clamping ring 6, the air bag is inflated, the angle between the two crests 422 is 60°-90°, the angle between the stepped surface 421 and the crest 422 is 90°-120°, the shape of the crest 422 is inverted triangular, when the inflated air bag 3 has a movement trend, the fixed part 42 can prevent the air bag 3 from moving in the opposite direction, thereby increasing the pull-out force of the air bag 3, and the inverted triangular structure of the crest 422 can effectively prevent air from overflowing and increase the sealing performance.

[0040] The top end arc of the crest 422 is φ0.2mm; the diameter of the stepped surface 421 is greater than the diameter of the crest 422.

[0041] The number of the crests 422 is six, and the number of the crests 422 is at least six, which can be adaptively increased.

[0042] By setting the top end arc of the tooth top 422 as φ0.2mm, the diameter of the step surface 421 is greater than the diameter of the tooth top 422, and the buckle ring 6 is matched, after the buckle ring 6 is buckled, the tooth top 422 and the step surface 421 are matched to limit the movement of the buckle ring 6, so as to achieve the effect of increasing the pull-out force.

[0043] Referring to Figures 1 to 7 The piston base 73 is welded on the shock absorber 1, the piston patch 2 is moved downward from the outer wall of the shock absorber 1 to be attached to the piston base 73, the sealing ring 71 is moved downward from the outer wall of the shock absorber 1 to the top end of the piston patch 72, the piston 4 is placed on the piston base 73 along the shock absorber 1 and attached to the piston patch 2, when the piston 4 is attached to the piston base 73, the travel of the sealing ring 71 is extruded, the inner wall of the sealing ring 71 is attached to the shock absorber 1, and the outer wall of the sealing ring 71 is attached to the inner wall of the piston 4, so as to achieve the effect of assembling sealing.

[0044] By attaching the piston patch 2 to the piston base 73, the sealing ring 71 to the top end of the piston patch 72, and the piston 4 to the piston base 73 along the shock absorber 1 and attached to the piston patch 2, the travel of the sealing ring 71 is extruded during the movement of the piston 4, so as to achieve the effect of improving the sealing performance of the piston; and during the sealing process, the travel of the sealing ring 71 is mechanically extruded during the movement of the piston 4, which can improve the assembly efficiency and eliminate the traditional welding groove, thereby reducing the manufacturing cost.

[0045] The sealing is performed by using one sealing ring 71, which not only reduces the weight and cost, but also optimizes the assembly structure and reduces the complexity of the process assembly; at the same time, the welding of the shock absorber is outside the sealing structure of the sealing ring 71, and there is no risk of welding gas leakage.

[0046] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

Claims

1. An air spring assembly, characterized in that: The device includes a piston (4), a retaining ring (6), and an airbag (3). The piston (4) includes a main body (41) and a fixed part (42). The airbag (3) is disposed on the fixed part (42). The retaining ring (6) is sleeved on the airbag (3). The fixed part (42) includes a column (423). The column (423) is provided with tooth crests (422) at equal intervals. The distance between the tooth crests (422) is 1.5-2.5mm. The angle between the tooth crests (422) is 60°-90°. One end of the column (423) is provided with a stepped surface (421). The angle between the stepped surface (421) and the tooth crests (422) is 90°-120°.

2. An air spring assembly according to claim 1, characterized in that: The tooth crest (422) is in the shape of an inverted triangle.

3. An air spring assembly according to claim 2, characterized in that: The top arc of the tooth crest (422) is φ0.2mm.

4. An air spring assembly according to claim 3, characterized in that: The diameter of the stepped surface (421) is larger than the diameter of the tooth crest (422).

5. An air spring assembly according to claim 1, characterized in that: The number of tooth crests (422) is set to six.

6. An air spring assembly according to claim 1, characterized in that: The device includes a shock absorber (1) and a sealing structure (7). The sealing structure (7) includes a sealing ring (71), a piston patch (72), and a piston base (73). The piston base (73), piston patch (72), and sealing ring (71) are sequentially fitted onto the shock absorber (1). The piston (4) is fitted onto the shock absorber (1). The piston patch (72) and sealing ring (71) are disposed between the shock absorber (1) and the piston (4).

7. An air spring assembly according to claim 6, characterized in that: The piston (4) is fitted with a dust cover (2) on its outer side.

8. An air spring assembly according to claim 6, characterized in that: The lower surface of the piston patch (72) abuts against the upper surface of the piston base (73).

9. An air spring assembly according to claim 6, characterized in that: The lower surface of the piston (4) abuts against the upper surface of the piston base (73).

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