阅读说明：本技术 一种内置螺旋弹簧的复合空气弹簧结构 (Composite air spring structure with built-in spiral spring ) 是由 张晓骏 李国全 庞滔 于 2020-08-04 设计创作，主要内容包括：本发明涉及一种内置螺旋弹簧的复合空气弹簧结构,包括上铝件、活塞、气囊、防尘罩和螺旋弹簧,气囊的上端口紧固在上铝件的外侧,气囊的下端口紧固在活塞的外侧,防尘罩的上端口连接在气囊的上端口的外侧,螺旋弹簧位于内囊内,螺旋弹簧的上端连接上铝件,螺旋弹簧的下端连接底座,底座设置在活塞上。本发明在空气弹簧内置螺旋弹簧与活塞连接结构,达到刚性与承载叠加,使空气弹簧在有限的空间内,满足高性能承载和刚性要求。(The invention relates to a composite air spring structure with a built-in spiral spring, which comprises an upper aluminum part, a piston, an air bag, a dust cover and a spiral spring, wherein the upper port of the air bag is fixedly arranged on the outer side of the upper aluminum part, the lower port of the air bag is fixedly arranged on the outer side of the piston, the upper port of the dust cover is connected to the outer side of the upper port of the air bag, the spiral spring is positioned in an inner bag, the upper end of the spiral spring is connected with the upper aluminum part, the lower end of the spiral spring is connected with a base, and the base is arranged. The connecting structure of the spiral spring and the piston is arranged in the air spring, so that the rigidity and the bearing superposition are achieved, and the air spring meets the requirements of high-performance bearing and rigidity in a limited space.)

1. The composite air spring structure with the built-in spiral spring is characterized by comprising an upper aluminum piece (2), a piston (13), an air bag (7), a dust cover (6) and a spiral spring (8), wherein an upper port of the air bag (7) is fastened on the outer side of the upper aluminum piece (2), a lower port of the air bag (7) is fastened on the outer side of the piston (13), an upper port of the dust cover (6) is connected on the outer side of the upper port of the air bag (7), the spiral spring (8) is located in the inner bag (7), the upper end of the spiral spring (8) is connected with the upper aluminum piece (2), the lower end of the spiral spring (8) is connected with a base (12), and the base (12) is arranged on the piston (13).

2. The composite air spring structure with the built-in spiral spring according to claim 1, wherein an air tap (1) is arranged on the upper aluminum part (2), and the air tap (1) is communicated with the inside of the air bag (7) to realize the function of inflating and deflating the inside of the air bag (7).

3. The built-in spiral spring compound air spring structure as claimed in claim 1, wherein the upper port of the air bag (7) is fastened to the upper aluminum member (2) by means of an upper pressing ring (4).

4. The innerspring composite air spring structure of claim 1, wherein the upper port of the dust cover (6) is secured to the upper aluminum member (2) by a clamp (3).

5. The built-in coil spring compound air spring structure according to claim 1, wherein a first rubber pad (5) is provided in the aluminum member (2), and an upper end of the coil spring (8) is connected to the first rubber pad (5).

6. The built-in spiral spring compound air spring structure as claimed in claim 1, wherein the base (12) is provided with a cylindrical protrusion (121), a second rubber pad (11) is sleeved on the outer side of the bottom of the cylindrical protrusion (121), and the lower end of the spiral spring (8) is sleeved on the outer side of the cylindrical protrusion (121) and abuts against the second rubber pad (11) and then is connected by a pin (9) in an interference fit manner.

7. The innerspring composite air spring structure of claim 1 wherein the base (12) and piston (13) are connected by a threaded arrangement.

8. The built-in coil spring compound air spring structure according to claim 1, wherein the lower port of the air bag (7) is fastened to the piston (13) by a lower pressing ring (10).

Technical Field

The invention relates to the field of sleeve type air springs, in particular to a composite air spring structure with a built-in spiral spring.

Background

Today, there are three main types of air springs: bladder, membrane, and sleeve. The sleeve type air spring is compact in structure and relatively small in bearing capacity, so that the sleeve type air spring is often applied to occasions with relatively compact space, such as seat suspensions, car suspensions and chassis suspensions of off-road vehicles. However, in the prior art, the sleeve type air spring applied to the car chassis has small bearing capacity and rigidity, and needs a large requirement on bearing capacity in a narrow car and off-road vehicle chassis suspension space, the internal pressure of the air spring is relatively large, the air spring is easy to fatigue and lose efficacy under large internal pressure due to exposure to air, and the service life of the air spring is shortened. Therefore, the development of the sleeve type air spring with high bearing capacity and rigidity, which is applied to the chassis suspension of the cars and off-road vehicles, is particularly urgent.

Disclosure of Invention

In view of the above, the present invention has been developed to provide a compound air spring structure with an internal coil spring that overcomes or at least partially solves the above-mentioned problems.

According to one aspect of the invention, a composite air spring structure with a built-in spiral spring is provided, which comprises an upper aluminum part, a piston, an air bag, a dust cover and a spiral spring, wherein an upper port of the air bag is fixedly arranged on the outer side of the upper aluminum part, a lower port of the air bag is fixedly arranged on the outer side of the piston, an upper port of the dust cover is connected on the outer side of the upper port of the air bag, the spiral spring is positioned in the inner bag, the upper end of the spiral spring is connected with the upper aluminum part, the lower end of the spiral spring is connected with a base, and the base is arranged.

In a possible implementation mode, an air nozzle is arranged on the upper aluminum piece and communicated with the inside of the air bag, so that the air filling and discharging function of the inside of the air bag 7 is realized.

In one possible embodiment, the upper port of the air bag is fastened with the upper aluminum piece through buckling of the upper pressing ring.

In one possible embodiment, the upper port of the dust cap is secured to the upper aluminum by a clamp.

In a possible embodiment, a first rubber pad is arranged in the aluminum piece, and the upper end of the spiral spring is connected with the first rubber pad.

In a possible embodiment, a cylindrical protrusion is arranged on the base, a second rubber pad is sleeved outside the bottom of the cylindrical protrusion, and the lower end of the spiral spring is sleeved outside the cylindrical protrusion and abuts against the second rubber pad and then is connected by a pin in an interference fit manner.

In one possible embodiment, the base and the piston are connected by a screw thread.

In one possible embodiment, the lower port of the air bag is fastened with the piston through a lower pressing ring in a buckling mode.

The invention has the beneficial effects that:

(1) the rigidity and the bearing capacity of the air spring are improved, the rigidity is improved by more than 30%, and the bearing capacity is improved by more than 20%.

(2) Under the overload condition, the built-in spiral spring can play a role in supporting and buffering, and the upper cover of the air spring and the lower piston are prevented from being damaged due to collision. The protective effect is achieved, and the service life of the product is prolonged.

(3) After the bearing capacity of the built-in air spring is improved, the requirement on the internal pressure of the air spring can be correspondingly reduced, so that the durability of the air spring is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a compound air spring structure with an internal spiral spring according to an embodiment of the present invention;

FIG. 2 is a perspective view of a compound air spring structure with an internal coil spring from another perspective;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic perspective view of a cylindrical protrusion according to an embodiment of the present invention;

description of reference numerals:

1-air nozzle, 2-upper aluminum piece, 3-hoop, 4-upper press ring, 5-first rubber pad, 6-dust cover, 7-air bag, 8-spiral spring, 9-pin, 10-lower press ring, 11-second rubber pad, 12-base and 13-piston;

121-cylindrical protrusion, 122-pin hole.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.