Sealing piston structure

Abstract

The utility model discloses a sealing piston structure which comprises a piston, a buckling tooth part, a thickening part, a connecting part, a supporting ring, a vertical part and a horizontal part. Through the supporting ring with the L-shaped cross section, the thickness of plastic materials of an injection molding piston and an end cover buckling area accessory can be improved, the requirement for supporting external buckling pressure is met, and meanwhile the defective product rate of parts is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealed piston structure. BACKGROUND

[0002] With the increasing demand of electric vehicle users on the vehicle's range, automobile manufacturers have gradually strengthened the research on lightweight parts, and for air spring assembly, the piston, base, gasket ring and other parts are also updated from metal materials to plastic materials.

[0003] In order to ensure the sealing performance of the air spring, the clamping process is generally used to clamp the clamping ring and the bladder on the clamping teeth of the piston / base from the outside to the inside, and the clamping force is 30-60kN. In order to prevent the plastic clamping teeth from being crushed, a metal support ring is injected into the clamping teeth during the injection molding of the piston, thereby supporting the clamping force from the outside to the inside and ensuring the integrity of the clamping teeth shape.

[0004] The clamping ring used in the industry at present is a standard circular ring, and the center section is I-shaped. When the I-shaped clamping ring is used for a non-0° piston structure, the thickness of the plastic near the clamping area is large, which leads to the easy production of concave in the injection molding process and high rate of defective products. INVENTION CONTENTS

[0005] The utility model aims at providing a sealed piston structure to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a sealed piston structure comprises:

[0007] The piston is composed of a clamping tooth part, a thickening part and a connecting part from top to bottom, and the thickening part gradually shrinks in the vertical direction;

[0008] The support ring is arranged inside the piston, and the cross section of the support ring is arranged in an "L" shape.

[0009] Preferably, the support ring is composed of a vertical part and a horizontal part, the vertical part is attached to the inner wall of the thickening part, and the horizontal part is attached to the inner wall of the thickening part.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] By the L-shaped support ring, the horizontal part is attached to the inner wall of the thickening part, so that the thickness of the inner wall of the thickening part is obviously reduced in the pouring process, thereby reducing the concave caused by the uneven wall thickness of the piston outer wall in the injection molding process, and improving the yield rate of the non-0° piston structure. DRAWINGS

[0012] Fig. 1 It is a whole schematic view of the utility model.

[0013] Fig. 2 Figure 1 is a whole schematic view of the support ring of the present application;

[0014] In the figure: 1, piston; 11, toothed part; 12, thickened part; 13, connecting part; 2, support ring; 21, vertical part; 22, horizontal part. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] Please refer to Figs. 1-2 The present application provides a technical solution: a sealed piston structure, comprising:

[0017] A piston 1, which is composed of a toothed part 11, a thickened part 12 and a connecting part 13 from top to bottom, and the thickened part 12 gradually shrinks in the vertical direction;

[0018] A support ring 2, which is arranged inside the piston 1, and the cross section of the support ring 2 is arranged in the shape of “L”.

[0019] In the embodiment, the support ring 2 is composed of a vertical part 21 and a horizontal part 22, the vertical part 21 is attached to the inner wall of the thickened part 12, and the horizontal part 22 is attached to the inner wall of the thickened part 12.

[0020] The support ring 2 with the cross section of “L” can improve the thickness of the plastic material of the injection molding piston and the end cover clamping area accessory, while meeting the support of the external clamping force, the defective rate of the parts is improved.

[0021] In the embodiment, the thickened part 12 of the piston 1 gradually shrinks in the vertical direction, and the angle between the thickened part 12 and the center line of the piston is 8°, so that the thickness of the end of the thickened part 12 close to the toothed part 11 is increased, and since the support ring 2 is in the shape of “L” and the horizontal part 22 is attached to the inner wall of the thickened part 12, the thickness of the inner wall of the thickened part 12 is obviously reduced during the pouring process, thereby reducing the depression of the outer wall of the piston caused by the uneven wall thickness during the injection molding process, and improving the yield.

[0022] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A sealed piston structure, characterized by, Comprise: A piston (1) which is composed of a toothed part (11), a thickened part (12) and a connecting part (13) from top to bottom, and the thickened part (12) is gradually contracted in vertical direction; A support ring (2) which is arranged inside the piston (1), the cross section of the support ring (2) is arranged in "L" shape.

2. A sealed piston structure according to claim 1, characterized in that: The support ring (2) is composed of a vertical part (21) and a horizontal part (22), the vertical part (21) is attached to the inner wall of the thickened part (12), and the horizontal part (22) is attached to the inner wall of the thickened part (12).

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