Air spring piston, air spring, air spring suspension system and vehicle

Abstract

The invention relates to an air spring piston, an air spring, an air spring suspension system and a vehicle. The air spring piston comprises a piston body, the piston body is internally provided with a cavity, the cavity is used for storing compressed air and supplying air to an air bag of an air spring, and the piston body is provided with an air conveying connector communicated with the cavity; the airbag skin pressing plate is used for pressing the airbag on the upper surface of the piston body; the first fixing piece is fixedly connected with the piston body, detachably connected with the bag skin pressing plate and used for fixing the bag skin pressing plate to the upper surface of the piston body. According to the air spring piston, the air spring, the air spring suspension system and the vehicle, the stability and flexibility of the air spring piston can be enhanced, the bearing capacity is improved, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle parts, and in particular to an air spring piston, an air spring, an air spring suspension system and a vehicle. Background Art

[0002] Air springs are elastic elements that use the compressibility of gas to achieve elasticity. They are often used to achieve vehicle cushioning, shock absorption, and support functions. Air springs fill a closed pressure cylinder with inert gas or oil-gas mixture to make the pressure in the cavity several or dozens of times higher than the atmospheric pressure. The cross-sectional area of ​​the piston rod is smaller than the cross-sectional area of ​​the piston to create a pressure difference to achieve the movement of the piston rod. The pressure is adjusted by controlling the amount of gas charged, thereby changing the support force and stiffness to adapt to different loads and working conditions.

[0003] Air springs are divided into three types according to the structural type of the airbag: capsule type, membrane type, and composite type. The closed airbag of the membrane air spring is composed of a rubber diaphragm and a metal piston. The membrane air spring can support the weight of the vehicle body at a lower air pressure, has stronger torsion resistance, a relatively ideal elastic characteristic curve, a simpler structural design, a larger adjustable height range, and a longer service life. Metal pistons are often used to support rubber springs and are connected to support arms. The rubber spring of the membrane air spring is fixed to the upper end of the metal piston through a pressure plate. The lower piston space of the existing air spring cannot be used, and the piston bottom plate and the support plate are set separately, which takes up a large space and is not conducive to the lightweight of the vehicle. Summary of the invention

[0004] Based on this, it is necessary to provide an air spring piston, an air spring, an air spring suspension system and a vehicle that can improve space utilization in order to address the above problems.

[0005] In a first aspect, an air spring piston is provided, characterized in that it comprises:

[0006] A piston body, wherein a cavity is provided inside the piston body, and the cavity is used to store compressed air and supply air to the airbag of the air spring, and an air supply interface connected to the cavity is provided on the piston body;

[0007] A bladder skin pressing plate, used for pressing the air bag onto the upper surface of the piston body;

[0008] The first fixing member is fixedly connected to the piston body and detachably connected to the bladder skin pressure plate, and is used for fixing the bladder skin pressure plate on the upper surface of the piston body.

[0009] In one of the embodiments, a recess is provided on the upper surface of the piston body, the size of the recess matches the bladder skin pressure plate, and when the bladder skin pressure plate is fixedly connected to the piston body, the bladder skin pressure plate is located in the recess.

[0010] In one of the embodiments, a transition section is provided between the bottom wall and the side wall of the recess, and a rounded structure is provided at the intersection of the upper surface of the piston body and the side surface of the piston body.

[0011] In one embodiment, it also includes:

[0012] A first supporting structure, arranged below the piston body and fixedly connected to the piston body, the first supporting structure comprising a supporting portion perpendicular to the bottom surface of the piston body and a fixing portion connected to the supporting portion, the fixing portion being arranged at an angle to the supporting portion;

[0013] The second fixing member is arranged on the fixing portion and is used to fix the piston body at a target position.

[0014] In one embodiment, the first supporting structure further includes a reinforcing portion, which is an arched structure and is fixedly connected to the supporting portion and the fixing portion.

[0015] In one of the embodiments, a second supporting structure is disposed inside the cavity, and the supporting structure is used to support the top surface of the cavity.

[0016] In a second aspect, an air spring is provided, characterized in that it includes an airbag and an air spring piston as described in the first aspect or any embodiment of the first aspect, a bladder skin pressure plate is arranged inside the airbag, the bladder skin pressure plate is connected to the upper surface of the air spring piston, and the bladder skin pressure plate is pressed onto the upper surface of the piston body.

[0017] In a third aspect, an air spring suspension system is provided, comprising a vehicle frame, an axle, a lower connecting plate, an air spring support arm, an air spring bracket and an air spring as described in the second aspect or any embodiment of the second aspect, wherein the air spring is fixed between the vehicle frame and the lower connecting plate, and the fixing portion of the air spring is connected to the lower connecting plate via a second fixing member; the first end of the air spring bracket is fixedly connected to the vehicle frame, and the second end is connected to the first end of the air spring support arm, the second end of the air spring support arm is connected to the lower connecting plate, and the axle is connected to the middle section of the air spring support arm.

[0018] In one of the embodiments, it also includes an air source, which is connected to the first end of the three-way connector, and the second and third ends of the three-way connector are respectively connected to the air inlet of the airbag and the air supply interface of the air spring piston, and an electromagnetic valve is arranged between the second end and the air inlet of the airbag.

[0019] In a fourth aspect, a vehicle is provided, comprising an air spring suspension system as in the third aspect or any embodiment of the third aspect.

[0020] The above-mentioned air spring piston, air spring, air spring suspension system and vehicle, the cavity inside the piston body can provide a stable air source for the airbag of the air spring, which helps the airbag to replenish compressed air in time during operation and maintain the air pressure within an appropriate range. The provision of an air supply interface helps an external air source to replenish or adjust the compressed air in the piston body cavity, and the air pressure of the air spring can be conveniently adjusted according to the actual load and working conditions of the vehicle. The airbag is pressed onto the upper surface of the piston body through a bladder skin pressure plate, and is fixedly connected to the piston body through a first fixing member and detachably connected to the bladder skin pressure plate, which can keep the relative position of the airbag and the piston body fixed, so that the airbag will not shift, fall off or deform during operation due to factors such as pressure changes and vehicle vibrations. The above-mentioned air spring piston, air spring, air spring suspension system and vehicle can enhance the stability and flexibility of the air spring piston, improve the load-bearing capacity, and facilitate maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of an air spring provided in one embodiment of the present application;

[0023] Figure 2 A schematic cross-sectional structure diagram of an air spring provided in one embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a piston body of an air spring provided in one embodiment of the present application;

[0025] Figure 4 A schematic diagram of the cross-sectional structure of a piston body of an air spring provided in one embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of an air spring suspension system provided in one embodiment of the present application;

[0027] Figure 6 A schematic diagram of the air spring suspension system structure and gas pipeline connection provided in one embodiment of the present application.

[0028] In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the attached symbols are explained as follows:

[0029] 10. Air spring; 100. Piston body; 110. Bag skin pressure plate; 120. First fixing member; 130. Recess; 131. Transition section; 132. Rounded corner structure; 140. First supporting structure; 141. Supporting part; 142. Fixing part; 143. Second fixing member; 144. Reinforcement part; 150. Cavity; 151. Air supply interface; 200. Air bag; 210. Upper cover; 20. Frame; 30. Axle; 40. Lower connecting support plate; 50. Air spring support arm; 60. Air spring bracket. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] The air spring assembly is generally arranged between the frame and the lower support arm, and is used to transmit and buffer the force and torque between the axle and the frame. The lower piston space of the existing air spring cannot be utilized, and the piston base plate and the support plate are arranged separately, resulting in space waste, which is not conducive to the lightweight of the vehicle. Therefore, this embodiment provides a piston with the function of storing compressed air and an air spring assembly formed thereby, so as to solve the above problems. Figure 1 A schematic diagram of the structure of an air spring provided in one embodiment of the present application; Figure 2 A schematic cross-sectional structure diagram of an air spring provided in one embodiment of the present application; Figure 3 A schematic diagram of the structure of a piston body of an air spring provided in one embodiment of the present application; Figure 4 This is a schematic diagram of the cross-sectional structure of the piston body of the air spring provided in one embodiment of the present application; Figures 1 to 4 , an air spring piston provided by an embodiment of the present application includes:

[0037] A piston body 100, wherein a cavity 150 is formed inside the piston body 100, wherein the cavity 150 is used to store compressed air and supply air to the airbag 200 of the air spring 10, and an air supply interface 151 communicating with the cavity 150 is formed on the piston body 100;

[0038] The airbag skin pressing plate 110 is used to press the airbag 200 onto the upper surface of the piston body 100;

[0039] The first fixing member 120 is fixedly connected to the piston body 100 and detachably connected to the bladder skin pressing plate 110 , and is used to fix the bladder skin pressing plate 110 on the upper surface of the piston body 100 .

[0040] like Figures 1 to 4 As shown, the air spring 10 includes an airbag 200 and a piston, wherein the rubber airbag 200 may be a cylindrical structure, and the components may include an inner rubber layer, an outer rubber layer and a cord layer, wherein the inner rubber layer mainly plays a sealing role, the cord layer plays a supporting role, and improves the pressure bearing capacity of the airbag 200, and the outer rubber layer is mainly used to protect the inner rubber layer and the cord layer. An upper cover plate 210 is arranged above the airbag 200, and the upper cover plate 210 is connected to the airbag skin of the airbag 200. A connecting piece is arranged on the upper cover plate 210 for connecting with the vehicle body. The piston is used to work with the airbag 200 to adjust the air pressure inside the airbag 200. When the vehicle load increases, the piston can move upward, the volume of the airbag 200 decreases, the air pressure increases, and the stiffness of the air spring 10 increases. Conversely, when the load decreases, the piston can move downward, the volume of the airbag 200 increases, the air pressure decreases, and the stiffness decreases. The piston body 100 is made of metal material, and its upper surface is connected to the bladder skin, and a cavity 150 is formed inside for storing compressed air. The piston body 100 is provided with a gas delivery interface 151, which is in communication with the cavity 150 and can be connected to the airbag 200 or the gas source through a pipeline. The gas source can deliver compressed gas to the cavity 150, and the cavity 150 can deliver compressed gas to the airbag 200 when needed. The side wall of the piston body 100 can be a cylindrical surface, which helps to guide the bladder skin to move along the side wall of the piston body 100. The bladder skin pressure plate 110 can be arranged inside the airbag 200, and is used to press the airbag 200 on the upper surface of the piston body 100, so as to ensure that the airbag 200 and the piston body 100 maintain a relatively fixed position relationship during the operation of the air spring 10, making the entire air spring 10 structure more stable, and preventing the rubber airbag 200 from shifting, twisting or shaking under pressure changes and vibrations. When the air spring 10 is under load, the piston body 100 can provide strong support for the airbag 200, and can make the bladder skin of the airbag 200 move along the outer surface of the piston body 100 during compression and relaxation, so that the movement of the airbag 200 is more precise and controllable. The first fixing member 120 can be a stud welded on the upper surface of the piston body 100, and the stud passes through the bladder skin pressure plate 110 and is fixed by a nut.

[0041] The piston of the air spring 10 can provide a stable air source for the airbag 200 of the air spring 10 through the cavity 150 inside the piston body 100, which helps the airbag 200 to replenish compressed air in time during operation and maintain the air pressure within a suitable range. The air supply interface 151 is provided to help the external air source to replenish or adjust the compressed air in the cavity 150 of the piston body 100, and the air pressure of the air spring 10 can be conveniently adjusted according to the actual load and working conditions of the vehicle. The airbag 200 is pressed onto the upper surface of the piston body 100 through the airbag skin pressing plate 110, and is fixedly connected to the piston body 100 through the first fixing member 120 and detachably connected to the airbag skin pressing plate 110, which can keep the relative position of the airbag 200 and the piston body 100 fixed, so that the airbag 200 will not be displaced, fall off or deformed during operation due to factors such as pressure changes and vehicle vibration. The stability and flexibility of the piston of the air spring 10 can be enhanced, the load-bearing capacity can be improved, and maintenance is convenient.

[0042] In an exemplary embodiment, a recess 130 is provided on the upper surface of the piston body 100 , and a size of the recess 130 matches the bladder skin pressure plate 110 . When the bladder skin pressure plate 110 is fixedly connected to the piston body 100 , the bladder skin pressure plate 110 is located in the recess 130 .

[0043] Among them, the concave portion 130 on the upper surface of the piston body 100 is used to limit the bladder skin and the bladder skin pressing plate 110. After the bladder skin pressing plate 110 is installed in place, it is located in the concave portion 130. The side wall of the concave portion 130 can prevent the bladder skin pressing plate 110 from shaking in the horizontal direction, thereby ensuring that the upper surface of the piston body 100 is in close contact with the surface of the airbag 200, so that when the airbag 200 and the piston move relative to each other, the bladder skin can move along the outer surface of the piston body 100, and the force of the piston body 100 can be evenly applied to the surface of the airbag 200, ensuring the stability of the interaction between the piston body 100 and the airbag 200. The size of the concave portion 130 matches the bladder skin pressing plate 110, which means that the cross-sectional area of ​​the concave portion 130 can be slightly larger than the area of ​​the bladder skin pressing plate 110, so as to reserve folding space for the bladder skin and avoid damaging the bladder skin.

[0044] In an exemplary embodiment, a transition section 131 is provided between the bottom wall and the side wall of the recess 130 , and a rounded structure 132 is provided at the intersection of the upper surface of the piston body 100 and the side surface of the piston body 100 .

[0045] Among them, the transition section 131 refers to the part located between the side wall and the bottom wall of the recess 130. The transition section 131 can be a slope that is angled with the bottom wall and the side wall. Providing the transition section 131 in the recess 130 can avoid stress concentration caused by the right-angle connection between the side wall and the bottom wall of the recess 130, so that the stress can be gradually distributed along the smooth contour, thereby improving the structural strength and reliability of the piston body 100. On the other hand, it can also avoid the airbag 200 from contacting the sharp corners of the piston during installation and use. When the airbag 200 is installed on the piston body 100, the transition section 131 can provide a smooth supporting surface for the airbag 200 to prevent the airbag 200 from being punctured or scratched by the corners of the recess 130. During the operation of the air spring 10, the airbag 200 will deform with the movement of the piston. The presence of the transition section 131 and the rounded corners can reduce the friction and wear between the airbag 200 and the piston, thereby extending the service life of the airbag 200.

[0046] In an exemplary embodiment, it also includes: a first supporting structure 140, which is arranged below the piston body 100 and fixedly connected to the piston body 100, the first supporting structure 140 includes a supporting portion 141 perpendicular to the bottom surface of the piston body 100 and a fixing portion 142 connected to the supporting portion 141, and the fixing portion 142 is arranged at an angle to the supporting portion 141; a second fixing member 143, which is arranged on the fixing portion 142, and is used to fix the piston body 100 at a target position.

[0047] The first support structure 140 may be a support plate welded to the lower surface of the piston body 100. The first support structure 140 is fixedly connected to the piston body 100, and a fixing portion 142 and a second fixing member 143 are arranged on the first support structure 140. The first support structure 140 can be connected to the vehicle body, thereby simplifying the connection structure between the air spring 10 and the suspension system. The support portion 141 is perpendicular to the bottom surface of the piston body 100, and can provide stable support for the piston body 100.

[0048] In an exemplary embodiment, the first supporting structure 140 further includes a reinforcing portion 144 . The reinforcing portion 144 is an arched structure and is fixedly connected to the supporting portion 141 and the fixing portion 142 .

[0049] Among them, the reinforcement part 144 of the arch structure has high bending and compression resistance. When subjected to external force, it can convert the external force into internal compressive stress and tensile stress, thereby better resisting deformation and improving the strength of the first support structure 140.

[0050] In an exemplary embodiment, a second supporting structure is disposed inside the cavity 150 , and the supporting structure is used to support the top surface of the cavity 150 .

[0051] When the air spring 10 is working, the compressed air in the airbag 200 will generate a large pressure on the top surface of the cavity 150 of the piston body 100. Setting a second support structure in the cavity 150 can disperse the pressure received by the top surface, reduce the risk of deformation or damage of the top surface due to pressure concentration, and enhance the overall strength of the piston body 100.

[0052] In an exemplary embodiment, an air spring 10 piston is provided, which is connected to a rubber bladder skin at the top and is connected to a support plate by welding at the bottom, including: a sealing structure at the top of the piston, a stud welded at the middle upper part of the piston, and a pressure plate for installing the rubber bladder skin; a vertical structure is adopted around the piston to guide the bladder skin when it moves up and down; the metal piston is integrally formed, the middle part of the upper part is a concave structure, the piston arm and the middle part are in an angled slope shape, and the upper end is smooth; a support plate is arranged at the bottom of the metal piston, including two welded metal studs and a nut mounting seat with an internal thread, and the support plate is connected to the metal piston by welding.

[0053] In an exemplary embodiment, the piston and the support plate are arranged vertically and connected by welding.

[0054] In an exemplary embodiment, two mounting bolt columns are disposed on the support plate, and the bolt columns are threadedly connected to the mounting seat.

[0055] In an exemplary embodiment, the nut mounting seat is connected to the quick-connect connector nut seat by threads.

[0056] In an exemplary embodiment, the piston support plate and the piston have positioning grooves.

[0057] In an exemplary embodiment, the piston support plate has a support bracket that cooperates with the support arm below.

[0058] like Figure 1-4As shown, the air spring 10 assembly includes a piston assembly, a bladder skin, an upper cover plate 210 of the air spring 10, a bladder skin pressure plate 110, and a fixing bolt of the bladder skin pressure plate 110, wherein the piston assembly includes: a piston body 100, a piston support plate, a connecting and fixing stud on the piston, a bladder skin transition band on the upper part of the piston, a connecting bolt under the piston, a nut seat on the piston bottom plate, a quick-connect connector, and a transition support of the piston support plate; the bladder skin is pressed onto the upper part of the piston through the bladder skin pressure plate 110, and is fixed to the piston by the fixing bolts of the bladder skin pressure plate 110. The bladder skin is completely attached to the bladder skin transition zone on the upper part of the piston and folded down along the piston arm; the bladder skin is connected to the upper cover plate 210 of the air spring 10; the fixing studs on the piston are welded to the upper part of the piston body 100; the piston support plate is welded to the piston body 100 to ensure that the air storage space inside the piston is well sealed; the lower connecting bolts of the piston are welded to the piston support plate; the piston bottom plate nut seat is connected to the piston support plate by welding, and the quick-connect connector seat is assembled with the piston bottom plate nut seat by threaded connection.

[0059] In an exemplary embodiment, an automobile chassis air spring 10 is provided, comprising the air spring 10 piston described in any of the above schemes.

[0060] Another object of the present invention is to provide a commercial vehicle air spring 10 suspension system, which has the function of an air reservoir, reduces the configuration of additional air reservoirs, helps save vehicle layout space, and improves the lightweight level of the vehicle.

[0061] Figure 5 A schematic diagram of the structure of an air spring 10 suspension system provided in one embodiment of the present application; Figure 6 A schematic diagram of the air spring 10 suspension system structure and gas pipeline connection provided in an embodiment of the present application is shown in FIG. Figures 5 and 6 As shown, in an exemplary embodiment, an air spring 10 suspension system is provided, including a vehicle frame 20, an air spring 10, an air suspension support plate, an air suspension solenoid valve, an air suspension air source, an air suspension sensor, an air suspension gas connecting pipeline, and an air spring support arm 50;

[0062] In an exemplary embodiment, the upper end of the air spring 10 is assembled with the vehicle frame 20 , and the lower end is fixed to the support arm of the airbag 200 via a support plate.

[0063] In an exemplary embodiment, the lower end of the air spring 10 is connected to the pipeline through a quick connector, the other end of the pipeline is connected to a three-way connector, and the branch pipeline is connected to the air source and the air inlet end of the air suspension solenoid valve.

[0064] In an exemplary embodiment, the upper end of the air spring 10 is connected to the air outlet of the solenoid valve, and the inflation or deflation is controlled by a sensor and a controller.

[0065] In an exemplary embodiment, the air storage function of the air spring 10 can be used to supply air to the brake system.

[0066] like Figure 5-6 As shown, the air suspension system provided by the present invention comprises the above-mentioned air spring 10 assembly, frame 20, lower connecting support plate 40, air spring support arm 50, air spring bracket 60, axle 30, air source, gas pipeline, and air suspension solenoid valve; wherein, the air spring 10 assembly is fixed between the frame 20 and the lower connecting support plate 40; the support plate and the lower connecting support plate 40 of the air spring 10 assembly are assembled together with the air spring support arm 50; one end of the air spring bracket 60 is connected to the air spring support arm 50, and the other end is fixed to the frame 20; one end of the gas pipeline is connected to the air source, and the other end is connected to the tee, the other end of the tee is connected to the quick socket of the air spring 10 piston, and the third end of the tee is connected to the air inlet end of the air suspension solenoid valve; one end of the gas pipeline is connected to the air outlet end of the air suspension solenoid valve, and the other end is connected to the air inlet end of the air spring 10 assembly.

[0067] The beneficial effects of the present invention include: by sealing the support plate and the piston body 100, the internal structure of the piston is converted into a usable air storage space, thereby achieving the purpose of eliminating the air storage cylinder provided for the vehicle's suspension system; at the same time, by integrating the original air suspension support plate with the bottom plate of the original metal piston, the open piston bottom plate is strengthened, thereby achieving an improvement in the bearing capacity of the air spring 10 piston; by adopting an integrally welded stud to eliminate the nut seat and the quick-insert nut seat in the original structure, the sealing stability and quick connection of the metal piston gas are ensured; in general, the closed air spring 10 metal piston can completely replace the existing open metal piston, the air storage function can reduce the number of air storage cylinders and save the layout space of the entire vehicle, the lower support plate of the integrated support plate reduces the number of components and improves the strength of the air spring 10 piston, and has the advantages of reliable connection and sealing.

[0068] In an exemplary embodiment, an air spring 10 is provided, including an airbag 200 and an air spring 10 piston as described in any of the above embodiments, a bladder skin pressure plate 110 is arranged inside the airbag 200, and the bladder skin pressure plate 110 is connected to the upper surface of the air spring 10 piston, and the bladder skin pressure plate 110 is pressed onto the upper surface of the piston body 100.

[0069] In an exemplary embodiment, an air spring 10 suspension system is provided, comprising a frame 20, an axle 30, a lower connecting plate 40, an air spring support arm 50, an air spring bracket 60 and an air spring 10 as described in any of the above embodiments, wherein the air spring 10 is fixed between the frame 20 and the lower connecting plate 40, and the fixing portion 142 of the air spring 10 is connected to the lower connecting plate 40 via a second fixing member 143; the first end of the air spring bracket 60 is fixedly connected to the frame 20, and the second end is connected to the first end of the air spring support arm 50, the second end of the air spring support arm 50 is connected to the lower connecting plate 40, and the axle 30 is connected to the middle section of the air spring support arm 50.

[0070] Through the above structure, a relatively stable geometric structure can be formed between the frame 20, the axle 30, the air spring support arm 50 and the air spring bracket 60. During the driving of the vehicle, the relative movement of each component can be effectively restricted, the correct position relationship between the axle 30 and the frame 20 can be maintained, the driving stability and controllability of the vehicle can be improved, and the structure is compact and easy to maintain.

[0071] In an exemplary embodiment, an air source is also included, which is connected to the first end of the three-way connector, and the second and third ends of the three-way connector are respectively connected to the air inlet of the airbag 200 and the air supply interface 151 of the piston of the air spring 10, and an electromagnetic valve is arranged between the second end and the air inlet of the airbag 200.

[0072] In an exemplary embodiment, an air spring suspension system as described in any one of the above embodiments is included.

[0073] In an exemplary embodiment, a vehicle is also provided, comprising the above-mentioned air spring suspension system.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air spring piston, characterized in that: include: A piston body, wherein a cavity is provided inside the piston body, and the cavity is used to store compressed air and supply air to the airbag of the air spring, and an air supply interface connected to the cavity is provided on the piston body; A bladder skin pressing plate, used for pressing the air bag onto the upper surface of the piston body; The first fixing member is fixedly connected to the piston body and detachably connected to the bladder skin pressure plate, and is used for fixing the bladder skin pressure plate on the upper surface of the piston body.

2. The air spring piston according to claim 1, characterized in that: The upper surface of the piston body is provided with a recess, the size of which matches the bladder skin pressure plate. When the bladder skin pressure plate is fixedly connected to the piston body, the bladder skin pressure plate is located in the recess.

3. The air spring piston according to claim 2, characterized in that: A transition section is provided between the bottom wall and the side wall of the recess, and a rounded structure is provided at the intersection of the upper surface of the piston body and the side surface of the piston body.

4. The air spring piston according to claim 1, characterized in that: Also includes: A first supporting structure, arranged below the piston body and fixedly connected to the piston body, the first supporting structure comprising a supporting portion perpendicular to the bottom surface of the piston body and a fixing portion connected to the supporting portion, the fixing portion being arranged at an angle to the supporting portion; The second fixing member is arranged on the fixing portion and is used to fix the piston body at a target position.

5. The air spring piston according to claim 4, characterized in that: The first supporting structure further includes a reinforcing portion, which is an arched structure and is fixedly connected to the supporting portion and the fixing portion.

6. The air spring piston according to claim 1, characterized in that: A second supporting structure is arranged inside the cavity, and the supporting structure is used to support the top surface of the cavity.

7. An air spring, characterized in that: It comprises an airbag and an air spring piston as described in any one of claims 1-6, wherein a bladder skin pressure plate is arranged inside the airbag, the bladder skin pressure plate is connected to the upper surface of the air spring piston, and the bladder skin pressure plate is pressed onto the upper surface of the piston body.

8. An air spring suspension system, characterized in that: It includes a vehicle frame, an axle, a lower connecting plate, an air spring support arm, an air spring bracket and an air spring as described in claim 7, wherein the air spring is fixed between the vehicle frame and the lower connecting plate, and the fixing portion of the air spring is connected to the lower connecting plate via a second fixing member; the first end of the air spring bracket is fixedly connected to the vehicle frame, and the second end is connected to the first end of the air spring support arm, the second end of the air spring support arm is connected to the lower connecting plate, and the axle is connected to the middle section of the air spring support arm.

9. The air spring suspension system according to claim 8, characterized in that: It also includes an air source, which is connected to the first end of the three-way connector. The second and third ends of the three-way connector are respectively connected to the air inlet of the airbag and the air supply interface of the air spring piston, and an electromagnetic valve is arranged between the second end and the air inlet of the airbag.

10. A vehicle, characterized in that: Comprising the air spring suspension system as claimed in claim 8 or 9.

Images