Air spring with damping function

Abstract

The utility model discloses an air spring with a damping function, which relates to the technical field of air springs and comprises a leather bag, an upper cover plate arranged at the top end of the leather bag and a piston arranged at the bottom end of the leather bag, a first cavity is formed in the leather bag, a second cavity is formed in the piston, and a vent hole is formed in the top surface of the piston. According to the utility model, when the road surface is bumpy, the suspension jumps upwards, and the leather bag is quickly compressed, the pressure in the first cavity is instantly increased, and the compressed air in the first cavity slowly enters the second cavity through the vent hole, so that a compression damping effect is achieved; when the axle is suspended, the suspension rebounds, and the leather bag is rapidly stretched, the pressure in the first cavity is instantaneously reduced, at the moment, the compressed air in the second cavity slowly enters the first cavity through the vent hole, the rebound damping effect is achieved, and when the air spring with the damping function is used, an additional shock absorber does not need to be assembled, and the cost is reduced. The air spring can achieve the comprehensive functions of shock absorption and buffering.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to an air spring with a damping function. Background Art

[0002] Air springs are springs that use air elasticity by filling a retractable closed container with compressed air. Commonly known as airbags, airbag cylinders, and leather cylinders, air springs are widely used in self-adjusting air suspensions for commercial vehicles, buses, rail vehicles, machinery and equipment, and building bases. Currently, commercial vehicle air suspensions are equipped with air springs and shock absorbers. The air springs mainly play a supporting role, and the shock absorbers can filter most of the vibrations caused by rough roads through their own damping function during vehicle driving. The two work together to ensure the normal use of the suspension.

[0003] Air springs are generally composed of four parts: the upper end of the bladder is fixed to the upper cover, and the lower end of the bladder is fixed to the piston. These three components form a closed area inside. When working, compressed air is input through the air inlet hole on the upper cover to achieve the required bearing capacity, and the buffer block is fixed on the piston in advance.

[0004] Although the above-mentioned air spring can play a buffering role on the vehicle frame, it is necessary to additionally assemble a shock absorber to achieve the shock absorption of the vehicle frame, which limits the function of the air spring. For this reason, we propose an air spring with a damping function. Utility Model Content

[0005] The main purpose of the utility model is to provide an air spring with a damping function, so as to solve the problem that although the air spring can play a buffering role on the frame, the shock absorption of the frame requires an additional shock absorber, which leads to the limitation of the function of the air spring.

[0006] To solve the above technical problems, the utility model is implemented through the following technical solutions: an air spring with a damping function, including a bladder, and also including: an upper cover plate arranged at the top end of the bladder and a piston arranged at the bottom end of the bladder, a first chamber is formed inside the bladder, and a second chamber is formed inside the piston, a vent is opened on the top surface of the piston, and the vent helps the first chamber and the second chamber to communicate with each other, and the main function of the vent is to limit the passage speed of gas.

[0007] Preferably, a buffer block is fixedly provided at the center of the piston top surface, and the buffer block extends into the first chamber. The buffer block mainly provides buffer support under extreme working conditions or when there is no compressed air.

[0008] Preferably, an air intake duct is fixedly provided on the top surface of the upper cover plate, and the air intake duct mainly introduces compressed air into the first chamber.

[0009] Preferably, there are two vent holes in total and they are symmetrically distributed on the top of the piston.

[0010] Preferably, the buffer block is located between two vent holes.

[0011] Preferably, there are two air inlet ducts in total and they are symmetrically distributed on the top of the bladder.

[0012] Preferably, the bladder, the piston and the buffer block are all located on the same vertical central axis.

[0013] Compared with the prior art, the air spring with damping function of the utility model has the following beneficial effects:

[0014] In the utility model, when the vehicle is traveling on a flat road, the pressures in the first chamber on the bladder and the second chamber on the piston are equal or close, the air flow between the first chamber and the second chamber is also very slow, and the vent hole has almost no damping effect; when the road surface is bumpy and the suspension jumps, the bladder is compressed quickly, the pressure in the first chamber rises instantly, and the compressed air in the first chamber slowly enters the second chamber through the vent hole, playing a compression damping role; when the axle is suspended and the suspension rebounds, the bladder is stretched quickly, the pressure in the first chamber drops instantly, and at this time, the compressed air in the second chamber slowly enters the first chamber through the vent hole, playing a rebound damping role. By using the air spring with damping function, there is no need to additionally assemble a shock absorber, and the air spring can play a comprehensive function of shock absorption and buffering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The figure is a schematic diagram of assembling an existing air spring on an air suspension of a vehicle;

[0017] Figure 2 It is a schematic diagram of the internal structure of an existing air spring;

[0018] Figure 3 The utility model is a schematic diagram of the internal structure of an air spring with a damping function.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Skin;

[0021] 101, first chamber;

[0022] 2. Upper cover;

[0023] 3. Piston;

[0024] 301, second chamber;

[0025] 4. Ventilation holes;

[0026] 5. Buffer block;

[0027] 6. Intake duct.

[0028] 7. Shock absorber. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0032] like Figure 1 , Figure 2 as well as Figure 3 As shown, an air spring with a damping function includes a bladder 1, and also includes: an upper cover plate 2 arranged on the top end of the bladder 1 and a piston 3 arranged on the bottom end of the bladder 1, a first chamber 101 is formed inside the bladder 1, a second chamber 301 is formed inside the piston 3, a vent hole 4 is opened on the top surface of the piston 3, and the vent hole 4 helps the first chamber 101 and the second chamber 301 to communicate with each other.

[0033] Furthermore, a buffer block 5 is fixedly disposed at the center of the top surface of the piston 3 , and the buffer block 5 extends into the first chamber 101 .

[0034] Furthermore, an air intake duct 6 is fixedly disposed on the top surface of the upper cover plate 2 .

[0035] Furthermore, two vent holes 4 are provided and are symmetrically distributed on the top of the piston 3 .

[0036] Furthermore, the buffer block 5 is located between the two vent holes 4 .

[0037] Furthermore, two air inlet ducts 6 are provided and are symmetrically distributed at the top of the bladder 1 .

[0038] Furthermore, the bladder 1, the piston 3 and the buffer block 5 are all located on the same vertical central axis.

[0039] The following is the working principle of the utility model:

[0040] After the device is installed as a whole on the vehicle air suspension, when the vehicle is traveling on a flat road, the pressures in the first chamber 101 on the bladder 1 and the second chamber 301 on the piston 3 are equal or close, the air flow between the first chamber 101 and the second chamber 301 is also very slow, and the vent 4 has almost no damping effect; when the road is bumpy and the suspension jumps, the bladder 1 is compressed quickly, the pressure in the first chamber 101 rises instantly, and the compressed air in the first chamber 101 slowly enters the second chamber 301 through the vent 4, playing a compression damping role; when the axle is suspended and the suspension rebounds, the bladder 1 is stretched quickly, the pressure in the first chamber 101 drops instantly, and at this time the compressed air in the second chamber 301 slowly enters the first chamber 101 through the vent 4, playing a rebound damping role, and the buffer block 5 mainly provides buffer support under extreme working conditions or when there is no compressed air. When using this air spring with damping function, there is no need to assemble a shock absorber additionally.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An air spring with a damping function, comprising a bladder (1), characterized in that: Also includes: An upper cover plate (2) is arranged at the top end of the bladder (1) and a piston (3) is arranged at the bottom end of the bladder (1). A first chamber (101) is formed inside the bladder (1), and a second chamber (301) is formed inside the piston (3). A vent hole (4) is provided on the top surface of the piston (3), and the vent hole (4) helps the first chamber (101) and the second chamber (301) to communicate with each other.

2. The air spring with damping function according to claim 1, characterized in that: A buffer block (5) is fixedly arranged at the centre of the top surface of the piston (3), and the buffer block (5) extends into the first chamber (101).

3. The air spring with damping function according to claim 1, characterized in that: An air intake duct (6) is fixedly arranged on the top surface of the upper cover plate (2).

4. The air spring with damping function according to claim 2, characterized in that: There are two vent holes (4) in total and they are symmetrically distributed on the top of the piston (3).

5. The air spring with damping function according to claim 4, characterized in that: The buffer block (5) is located between the two vent holes (4).

6. The air spring with damping function according to claim 3, characterized in that: The air intake ducts (6) are provided with two in total and are symmetrically distributed at the top end of the bladder (1).

7. The air spring with damping function according to claim 2, characterized in that: The bladder (1), the piston (3) and the buffer block (5) are all located on the same vertical central axis.

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