Double-air-chamber air spring piston assembly

Abstract

The utility model discloses a double-air-chamber air spring piston assembly which comprises a piston cylinder body, an electromagnetic valve seat used for installing a valve body is integrally formed at the bottom end of one side of the piston cylinder body, a sealing piston cavity is vertically formed in the piston cylinder body, and the piston cylinder body and the electromagnetic valve seat are arranged in an integrated structure. The valve seat mounting cavity integrally connected in the electromagnetic valve seat enables the electromagnetic valve to be mounted in the valve seat mounting cavity, one end of the electromagnetic valve, the electromagnetic valve seat and the piston cylinder body are located on the same horizontal plane, the electromagnetic valve is tightly ejected in the valve seat mounting cavity through the sealing base to be fixed, and therefore the size of the double-air-chamber air spring piston assembly is reduced, and the service life of the double-air-chamber air spring piston assembly is prolonged. And meanwhile, the situation that an air spring piston collides with a fixed base of the double-air-chamber air spring piston assembly in the working process due to the fact that the electromagnetic valve is installed to protrude out is avoided, then the safety of the electromagnetic valve in the using process can be guaranteed, and the overall size of the double-air-chamber air spring piston assembly can be controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of air springs, and in particular relates to a double-chamber air spring piston assembly. Background Art

[0002] The air spring is an important vibration reduction component installed between the car body and the bogie. The nodding, shaking, serpentine and rolling movements of the vehicle during operation are all applied to the air spring as excitation amplitudes. The multi-degree-of-freedom deformation and vibration reduction and energy dissipation functions of the air spring enable it to play a good vibration reduction role under various excitation amplitude conditions, ensuring the safe and stable operation of the vehicle. The existing dual-chamber air spring has the following problems: 1. During the sample verification stage, the piston housing and piston base of its piston structure are injection molded. On the one hand, the preparation of the piston housing and the piston base requires the assistance of an injection mold; on the other hand, a hot melt mold is required when the piston housing and the piston base are connected, that is, the piston structure sample requires the assistance of two molds, resulting in a high production cost of the piston structure sample; 2. During the sample verification stage, the verification and debugging requirements of the suspension for different stiffness target gradients of the dual-chamber air spring cannot be achieved; 3. Due to the space reasons for the layout of the dual-chamber air spring, the structural design of some auxiliary air chambers is limited, so the structural design is difficult.

[0003] To this end, a dual-chamber air spring piston structure with a bulletin number of "CN218598699U" is provided, which includes an aluminum piston housing, a piston base and a solenoid valve. A direct main and auxiliary air chamber channels are provided in the piston housing, and an aluminum piston insert is welded on the lower port of the main and auxiliary air chamber channels. The piston insert has a valve connecting portion, and the lower port of the main and auxiliary air chamber channels is only connected to the outside of the main and auxiliary air chamber channels through the inner hole of the valve connecting portion. The piston base is mainly composed of a base body and a valve mounting seat, and the valve mounting seat is arranged on one circumferential side of the base body. The bottom end of the piston housing is aligned with the top end of the piston base and welded, the valve connecting portion extends into the top of the valve mounting seat, the solenoid valve is vertically assembled in the valve mounting seat, the valve connecting portion is sleeved on the top end of the solenoid valve, the inner cavity of the piston housing and the annular concave cavity of the base body constitute a secondary air chamber, and when the solenoid valve is opened, the secondary air chamber is connected to the main air chamber through the main and auxiliary air chamber channels; the advantages are low sample production cost, simple secondary air chamber structural design, and high space utilization.

[0004] However, for the above-mentioned dual-chamber air spring piston structure, although the solenoid valve extends vertically from the bottom of the valve mounting seat and is assembled in the valve mounting seat, and the valve connecting part is sleeved on the top of the solenoid valve, there are still the following obvious defects during use: the solenoid valve seat in the above-mentioned spring piston is convexly arranged on the outside of the bottom end of the piston shell, which is easy to cause collision damage between the protrusion of the solenoid valve and the mounting seat of the spring piston during installation and use of the spring piston, thereby making the solenoid valve relatively unsafe during use, and also increasing the installation area of ​​the spring piston. Utility Model Content

[0005] The utility model aims to provide a dual-chamber air spring piston assembly to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a dual-chamber air spring piston assembly, comprising:

[0007] A piston cylinder body, wherein a solenoid valve seat for installing a valve body is integrally formed at the bottom end of one side of the piston cylinder body, a sealed piston cavity is vertically provided inside the piston cylinder body, a secondary air cavity is formed between the outside of the sealed piston cavity and the internal cavity of the piston cylinder body, a shock-absorbing sealing sleeve is provided on the outside of the upper end of the piston cylinder body, and a main air cavity connected to the secondary air cavity is provided inside the shock-absorbing sealing sleeve;

[0008] A valve seat installation cavity, wherein the valve seat installation cavity is arranged inside the solenoid valve seat, and the bottom port of the valve seat installation cavity is connected to the bottom of the solenoid valve seat, and a sealing base for sealing the solenoid valve seat and the bottom of the piston cylinder is installed on the solenoid valve seat and the bottom of the piston cylinder, and a sealing through hole is provided on the surface of the sealing base for sealing the sealing piston cavity and the valve seat installation cavity.

[0009] Preferably, a positioning groove is extended outward from the bottom notch of the valve seat mounting cavity, and an electromagnetic valve is installed in the valve seat mounting cavity and positioned by the positioning groove. A through air hole is provided around the inner wall of the valve seat mounting cavity, which can control the air pressure of the gas entering the auxiliary air cavity, which is conducive to adjusting the pneumatic shock-absorbing elasticity of the spring piston.

[0010] Preferably, the sealed piston cavity is provided with a piston rod which penetrates from the bottom of the piston cylinder to the upper end of the piston cylinder, and a dustproof sealing rubber ring is provided at the bottom port of the sealed piston cavity where the piston rod contacts, so as to achieve sealing between the spring piston and the piston cylinder and reduce the risk of dust entering the piston cavity during operation.

[0011] Preferably, a sealing baffle is provided on the inner side of the end of the piston cylinder body, and an air hole is provided on the surface of the sealing baffle to connect the auxiliary air chamber with the main air chamber, which is beneficial to the connection and coordination between the main air chamber and the auxiliary air chamber, so that the spring piston has a good shock filtering effect and is conducive to air lifting and lowering adjustment.

[0012] Preferably, a hidden bolt member is passed through the side of the sealing base, and the sealing base is fixed to the bottom of the solenoid valve seat and the piston cylinder body by the hidden bolt member. The valve core of the solenoid valve extends to the outer side of the sealing base through the sealing through hole, so that the solenoid valve and one end of the piston cylinder body are on the same horizontal plane, reducing the volume of the air spring piston and ensuring the safety of the use of the solenoid valve.

[0013] Preferably, the piston cylinder body is connected with a waist-shaped block through a table surface provided on the outer surface, and the inner side of the bottom of the waist-shaped block is evenly provided with downwardly protruding embedded blocks, and the waist-shaped block is embedded in the embedded groove provided on the table surface through the embedded block. The shock-absorbing sealing sleeve is connected to the outside of the waist-shaped block, which can make the air spring and the bladder skin bag sealed and fixedly connected, so as to realize the function of pneumatic extension and retraction of the bladder skin.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the dual-chamber air spring piston assembly is arranged through the integrated structure of the piston cylinder and the solenoid valve seat, and the valve seat mounting cavity integrally connected in the solenoid valve seat, so that the solenoid valve can be installed in the valve seat mounting cavity so that one end of it is on the same horizontal plane as the solenoid valve seat and the piston cylinder, and the solenoid valve is pressed tightly in the valve seat mounting cavity by using a sealing base for fixing, thereby reducing the volume of the dual-chamber air spring piston assembly, and preventing the solenoid valve from being installed protruding outside so that the air spring piston hits the fixed base of the dual-chamber air spring piston assembly during operation, thereby ensuring the safety of the solenoid valve in use, and controlling the overall volume of the dual-chamber air spring piston assembly.

[0015] The auxiliary air chamber formed between the inside of the piston cylinder and the outside of the sealed piston chamber can allow the gas in the auxiliary air chamber to evenly enter the main air chamber through the through-holes, so that the air pressure can be evenly distributed to support the dual-chamber air spring piston assembly horizontally, thereby preventing the auxiliary air chamber arranged on one side of the piston cylinder from allowing the gas to enter the main air chamber from one side, causing the dual-chamber air spring piston assembly to tilt to one side during supported use, further improving the horizontal stability of the support of the dual-chamber air spring piston assembly, thereby increasing the space utilization rate and making the overall product structure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the piston cylinder of the utility model from a top view;

[0018] Figure 3 This is a schematic diagram of the sealing base structure of the utility model when viewed from above;

[0019] Figure 4 This is a schematic diagram of the main structure of the waist embedded block of the utility model.

[0020] In the figure: 1. Piston cylinder; 2. Solenoid valve seat; 3. Sealed piston chamber; 4. Auxiliary air chamber; 5. Shock-absorbing sealing sleeve; 6. Main air chamber; 7. Valve seat installation chamber; 8. Sealing base; 9. Sealing through hole; 10. Positioning groove; 11. Solenoid valve; 12. Through air hole; 13. Piston rod; 14. Sealing partition; 15. Air hole; 16. Waist-shaped block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: a double-chamber air spring piston assembly, comprising:

[0023] The piston cylinder 1 has a sealing structure at the bottom thereof and is made of forged aluminum. The bottom end of one side of the piston cylinder 1 is integrally formed with an electromagnetic valve seat 2 for installing the valve body. The electromagnetic valve 11 can be installed inside the electromagnetic valve seat 2 for setting, and the overall structural volume of the spring piston can be reduced. A sealed piston chamber 3 is vertically provided inside the piston cylinder 1, and the bottom end of the sealed piston chamber 3 is connected to one side of the bottom of the piston cylinder 1, which is conducive to the piston rod 13 penetrating into the sealed piston chamber 3 for piston extension and contraction. The bottom of the sealed piston chamber 3 is an outer portion that penetrates the sealed piston chamber 3. A secondary air chamber 4 is formed between the piston cylinder 1 and the inner cavity of the piston cylinder 1, and the gas in the secondary air chamber 4 can be connected or blocked with the main air chamber 6 through the opening and closing of the electromagnetic valve 11. A shock-absorbing sealing sleeve 5 is provided on the upper end of the piston cylinder 1. The shock-absorbing sealing sleeve 5 is used to seal and fix one end of the bladder skin after being connected to the spring piston, so as to strengthen the sealing between the bladder skin and the piston cylinder 1 and avoid air leakage. A main air chamber 6 connected with the secondary air chamber 4 is provided inside the shock-absorbing sealing sleeve 5, which can play the role of air pressure shock-absorbing support when the spring piston is used, and can be raised and lowered;

[0024] The valve seat installation cavity 7 is arranged inside the solenoid valve seat 2, which is conducive to hiding and fixing the solenoid valve 11 inside the solenoid valve seat 2, reducing the use of space, and the bottom port of the valve seat installation cavity 7 is connected to the bottom of the solenoid valve seat 2, and the solenoid valve seat 2 and one end of the valve seat installation cavity 7 are connected as a whole by through welding, so that the solenoid valve 11 can be installed inside the solenoid valve seat 2, and the solenoid valve seat 2 and the bottom of the piston cylinder 1 are installed with a sealing base 8 for sealing the solenoid valve seat 2 and the bottom of the piston cylinder 1, which is used to tighten and fix the solenoid valve 11 and position and seal the piston rod 13, and the surface of the sealing base 8 is provided with a sealing base 8 that is connected to the sealing base 8. The sealing through hole 9 that seals and penetrates the plug cavity 3 and the valve seat installation cavity 7 is helpful to adjust the height of the air spring piston and adjust the air pressure inside the air spring piston. A positioning groove 10 is extended outward from the bottom notch of the valve seat installation cavity 7, so that after the solenoid valve 11 is installed in the valve seat installation cavity 7, one end of the solenoid valve 11 is positioned through the cooperation of the protruding replacement part and the positioning groove 10, and the solenoid valve 11 is installed in the valve seat installation cavity 7 and is positioned by the positioning groove 10. A through air hole 12 is provided around the inner wall of the valve seat installation cavity 7, and the air pressure inside the air spring piston is controlled by the solenoid valve 11.

[0025] The sealed piston chamber 3 is provided with a piston rod 13 which penetrates from the bottom of the piston cylinder body 1 to the upper end of the piston cylinder body 1, and the upper end of the piston rod 13 passes through the sealing partition 14 and extends to the inside of the main air chamber 6. A dustproof sealing rubber ring is provided at the bottom port of the piston rod 13 contacting the sealed piston chamber 3 to reduce the entry of external dust into the sealed piston chamber 3. A sealing partition 14 is provided on the inner side of the end of the piston cylinder body 1 to position the piston rod 13 during the extension and retraction process, and an airtight silicone ring is embedded on the inner wall of the circular hole in the middle of the sealing partition 14 to seal between the piston rod 13 and the main air chamber 6 to avoid the occurrence of air pressure leakage, and a gas seal is provided on the surface of the sealing partition 14 to connect the auxiliary air chamber 4 with the main air chamber 6. Hole 15 is conducive to controlling the air pressure inside the main air chamber 6, so that the air spring piston assembly can be air-regulated and lifted. Hidden bolts are penetrated around the side of the sealing base 8, and the sealing base 8 is fixed to the bottom of the solenoid valve seat 2 and the piston cylinder body 1 through the hidden bolts. The valve core of the solenoid valve 11 extends to the outer side of the sealing base 8 through the sealing through hole 9. The piston cylinder body 1 is connected with a waist block 16 through a table provided on the outer surface. The inner side of the bottom of the waist block 16 is evenly provided with downwardly protruding embedded blocks, and the waist block 16 is embedded in the embedded groove provided on the table through the embedded block. The shock-absorbing sealing sleeve 5 is sleeved to the outside of the waist block 16, which is conducive to connecting with the external bag skin to form an air pressure bag bag for air shock-absorbing support.

[0026] The piston cylinder 1 and the solenoid valve seat 2 are formed by spinning, secondary stamping and heating forging respectively, and the solenoid valve seat 2 is formed by hot forging and fixed into an integrated structure by welding, thereby ensuring the stability of the entire structure.

[0027] Specifically, the solenoid valve seat 2 is integrally welded to the bottom end of one side of the piston cylinder body 1, and the bottom of the solenoid valve seat 2 is sealed with the piston cylinder body 1 as a whole, the sealed piston chamber 3 passes through the upper end of the piston cylinder body 1 to the bottom of the piston cylinder body 1, and the piston rod 13 is movably arranged inside the sealed piston chamber 3, and at the same time, the valve seat installation chamber 7 is penetrated from the sealing surface at the bottom of the solenoid valve seat 2 to the inside, so that the sealing surface at the bottom of the solenoid valve seat 2 and one end of the combination of the valve seat installation chamber 7 are sealed and welded as a whole, so that the auxiliary air chamber 4 can be effectively sealed. At this time, the solenoid valve 11 is installed in the valve seat installation chamber 7 for sealing installation, and the solenoid valve 11 is positioned through the positioning groove 10. Finally, the sealing base 8 is passed through the valve core of the solenoid valve 11 and the piston rod 13 and is locked and fixed with bolts, so that the solenoid valve 11 can be installed together with the solenoid valve seat 2 and the piston cylinder body 1. On a horizontal line, thereby reducing the danger of the protruding installation of the solenoid valve, and at the same time reducing the installation volume of the air spring piston, so that the main air chamber 6 and the auxiliary air chamber 4 are independent of each other after installation, and the working states of the main air chamber 6 and the auxiliary air chamber 4 are controlled only by the opening and closing of the valve core of the solenoid valve 11, and the dual-chamber air spring piston is used to control the working states of the main air chamber 6 and the auxiliary air chamber 4 by opening and closing the valve core of the solenoid valve 11. When the valve core of the solenoid valve 11 is closed, only the main air chamber 6 of the dual-chamber air spring works, and the auxiliary air chamber 4 does not participate in the work, providing the suspension with high-rigidity spring characteristics; when the valve core of the solenoid valve 11 is opened, the main air chamber 6 and the auxiliary air chamber 4 of the dual-chamber air spring work together, and the main air chamber 6 and the auxiliary air chamber 4 are connected through the two, providing the suspension with low-rigidity spring characteristics, which can achieve the comfort design requirements of the vehicle for the low-rigidity driving experience of the air spring.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-chamber air spring piston assembly, characterized in that: include: A piston cylinder (1), wherein a solenoid valve seat (2) for mounting a valve body is integrally formed at the bottom end of one side of the piston cylinder (1), a sealed piston cavity (3) is vertically arranged inside the piston cylinder (1), a secondary air cavity (4) is formed between the outside of the sealed piston cavity (3) and the internal cavity of the piston cylinder (1), a shock-absorbing sealing sleeve (5) is arranged outside the upper end of the piston cylinder (1), and a main air cavity (6) connected to the secondary air cavity (4) is arranged inside the shock-absorbing sealing sleeve (5); A valve seat installation cavity (7), wherein the valve seat installation cavity (7) is arranged inside the electromagnetic valve seat (2), and the bottom port of the valve seat installation cavity (7) is connected to the bottom of the electromagnetic valve seat (2), and the electromagnetic valve seat (2) and the bottom of the piston cylinder body (1) are installed with a sealing base (8) for sealing the electromagnetic valve seat (2) and the bottom of the piston cylinder body (1), and the surface of the sealing base (8) is provided with a sealing through hole (9) that is sealed and penetrates the sealing piston cavity (3) and the valve seat installation cavity (7).

2. A dual-chamber air spring piston assembly according to claim 1, characterized in that: A positioning groove (10) is extended outward from the bottom notch of the valve seat installation cavity (7), and a solenoid valve (11) is installed in the valve seat installation cavity (7) and positioned by the positioning groove (10), and a through air hole (12) is provided around the inner wall of the valve seat installation cavity (7).

3. The dual-chamber air spring piston assembly according to claim 1, characterized in that: The sealed piston chamber (3) is provided with a piston rod (13) which penetrates from the bottom of the piston cylinder (1) to the upper end of the piston cylinder (1), and a dustproof sealing rubber ring is provided at the bottom port of the piston rod (13) contacting the sealed piston chamber (3).

4. The dual-chamber air spring piston assembly according to claim 1, characterized in that: A sealing partition (14) is provided on the inner side of the end of the piston cylinder (1), and an air hole (15) for connecting the auxiliary air chamber (4) with the main air chamber (6) is provided on the surface of the sealing partition (14).

5. The dual-chamber air spring piston assembly according to claim 2, characterized in that: A hidden bolt member is passed through the side of the sealing base (8), and the sealing base (8) is fixed to the electromagnetic valve seat (2) and the bottom of the piston cylinder (1) by the hidden bolt member, and the valve core of the electromagnetic valve (11) extends to the outer side of the sealing base (8) through the sealing through hole (9).

6. The dual-chamber air spring piston assembly according to claim 1, characterized in that: The piston cylinder body (1) is sleeved with a waist-shaped block (16) via a table surface provided on the outer surface, and downwardly protruding inserts are evenly provided on the inner side of the bottom of the waist-shaped block (16), and the waist-shaped block (16) is embedded in an embedding groove provided on the table surface through the inserts, and the shock-absorbing sealing sleeve (5) is sleeved onto the outside of the waist-shaped block (16).

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