Air spring damper assembly with built-in valve

Abstract

The invention belongs to the technical field of shock absorbers, and particularly relates to an air spring shock absorber assembly with a built-in valve, the shock absorber assembly comprises an air spring and a shock absorber, the shock absorber comprises an oil storage cylinder and a shock absorber piston rod telescopically connected in the oil storage cylinder; the air spring comprises a metal gland arranged on the piston rod in a sleeving mode, a rolling piston arranged on the oil storage cylinder in a sleeving mode and a capsule connected with the metal gland and the rolling piston. The air spring further comprises an air inlet valve arranged on one side of the rolling piston, a first push rod cooperating with the air inlet valve, an exhaust valve arranged on the other side of the rolling piston and a second push rod cooperating with the exhaust valve. The first push rod and the second push rod are both arranged in a gap between the rolling piston and the oil storage cylinder and can synchronously move along with the metal gland. The air spring shock absorber is used for solving the technical problems that an existing air spring shock absorber is low in production efficiency and high in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and in particular relates to an air spring shock absorber assembly with a built-in valve. Background Art

[0002] Automotive shock absorbers include coil spring shock absorbers and air spring shock absorbers. Air spring shock absorbers have expanded their applications in motor vehicles due to their nonlinear characteristics and large load range. Traditional air spring shock absorbers are usually used in conjunction with a height valve, which adjusts the working height of the air spring through the sensing information of the height valve, which makes the design of an external split height valve complex to assemble.

[0003] The setting of the air spring shock absorber and the external split height valve requires, firstly, a certain space for the arrangement of the height valve, and a reserved arrangement position and a matching sensor bracket need to be reserved; secondly, when the shock absorber assembly is installed on the automobile factory production line for the first time, the installation height of the shock absorber piston rod needs to be manually adjusted. The adjustment process is cumbersome, time-consuming and laborious, which is not conducive to production efficiency and increases production costs.

[0004] Also, when the vehicle is traveling at high speed over a pothole or obstacle on the road, the existing external height valve type air spring shock absorber does not have time to respond to the intake and exhaust operations, resulting in a poor shock absorption effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an air spring shock absorber assembly with a built-in valve, which is used to solve the technical problems that the current air spring shock absorber is used in conjunction with an external height valve, the installation of the height valve requires auxiliary accessories, the piston rod installation height needs to be manually adjusted during the installation of the shock absorber assembly, and the installation process is cumbersome and costly.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: an air spring shock absorber assembly with a built-in valve, the shock absorber assembly includes an air spring and a shock absorber, the shock absorber includes an oil storage cylinder and a shock absorber piston rod telescopically connected to the oil storage cylinder; the air spring includes a metal gland sleeved on the piston rod, a rolling piston sleeved on the oil storage cylinder, and a capsule connecting the metal gland and the rolling piston, the air spring also includes an intake valve arranged on one side of the rolling piston, a first push rod cooperating with the intake valve, an exhaust valve arranged on the other side of the rolling piston, and a second push rod cooperating with the exhaust valve; the first push rod and the second push rod are both arranged in the gap between the rolling piston and the oil storage cylinder, and can move synchronously with the metal gland; The intake valve comprises an intake seal for sealing an air passage, a first elastic member arranged at one end of the intake seal to give the intake seal an elastic force to seal the air passage, and a first reset rod arranged at the other end of the intake seal and used to push the intake seal to move and open; The exhaust valve comprises an exhaust seal for sealing the airway, a second elastic member arranged at one end of the exhaust seal to give the exhaust seal an elastic force to open the airway, and a second reset rod arranged at the other end of the exhaust seal and used to push the exhaust seal to move and seal the airway; The ends of the first sealing push rod and the second sealing push rod partially extend into the gap between the rolling piston and the oil storage cylinder; When the capsule is at a standard height, the first push rod and the first reset rod are in a disengaged state, and the second push rod and the second reset rod are in an abutted state, that is, the intake valve and the exhaust valve are both in a closed state; when the capsule is compressed below the standard height, the first push rod moves downward with the metal pressure cover, the lower end of the first push rod passes through the gap between the first reset rod and the oil storage cylinder, and forces the first reset rod to move, and the first reset rod pushes the intake seal to open the airway to achieve air intake; when the capsule is stretched above the standard height, the second push rod moves upward with the metal pressure cover, the second push rod disengages from the second reset rod upward, the second reset rod is released and moves a certain distance toward the oil storage cylinder, and the elastic force of the second elastic member supports the exhaust seal to move to open the airway to achieve exhaust.

[0007] Preferably, a first universal ball is provided at the end of the first reset rod away from the intake seal, and the first push rod contacts the first universal ball when opening the intake valve.

[0008] Preferably, the first reset rod is telescopically connected in the air passage of the intake valve via a sliding bearing.

[0009] Preferably, the intake seal comprises a first sealing push rod and a first sealing ring sleeved outside the first sealing push rod; the first sealing ring is conical and cooperates with the inner conical surface in the air passage of the intake valve.

[0010] Preferably, the air intake valve further comprises a first positioning member disposed at the airway opening and used to support the first elastic member, and a first copper sleeve used to fix the first positioning member.

[0011] Preferably, a second universal ball is provided at the end of the second reset rod away from the exhaust seal, and when the second push rod drives the exhaust valve to close, the second push rod abuts between the second universal ball and the oil storage cylinder.

[0012] Preferably, the second reset rod is telescopically connected in the air passage of the exhaust valve via a sliding bearing.

[0013] Preferably, the exhaust seal is a second sealing ring sleeved on the end of the second reset rod and a second sealing push rod abutting against the second sealing ring; the second sealing ring is conical and cooperates with the inner conical surface in the airway of the exhaust valve.

[0014] Preferably, the exhaust valve further comprises a second positioning member disposed at the airway opening and used to support the second elastic member, and a second copper sleeve used to fix the second positioning member.

[0015] Preferably, the exhaust valve further comprises a pressure-maintaining valve disposed between the second elastic member and the second positioning member, and configured to automatically close when the air pressure in the capsule is less than a set value, and the exhaust valve stops exhausting.

[0016] The beneficial effects of the technical solution of the present invention are: The present invention automatically opens the air intake valve or the exhaust valve during the compression or extension process of the air spring to achieve air intake or exhaust to adjust the working height of the air spring and improve the ride comfort of the vehicle. In this way, the height valve is integrated inside the air spring, and there is no need to install the height valve and bracket on the vehicle body, and there is no need to manually adjust the installation height of the shock absorber piston rod, which saves time, labor and cost. By arranging the first push rod and the second push rod in the capsule, the first push rod and the second push rod are both arranged in the gap between the rolling piston and the oil storage cylinder, the metal pressure cap connected to the upper end of the capsule moves up and down synchronously with the shock absorber piston rod, and the first push rod and the second push rod move up and down synchronously with the metal pressure cap, and are respectively used to cooperate with the reset push rods of the air intake valve and the exhaust valve, so as to control the air intake of the air intake valve when the capsule is lower than the standard height and control the exhaust of the exhaust valve when the capsule is higher than the standard height, with sensitive response and automatic adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of an embodiment of an air spring damper assembly with a built-in valve; Figure 2 for Figure 1 Enlarged schematic diagram of the middle intake valve; Figure 3 for Figure 1 Enlarged schematic diagram of the middle exhaust valve; Figure 4 A schematic diagram of a vehicle body lowering air intake of an embodiment of an internal valve air spring shock absorber assembly; Figure 5 A schematic diagram of a vehicle body lift exhaust of an embodiment of an internally valved air spring damper assembly.

[0018] in, Figure 1-5 In the figure, 1-metal gland, 2-first metal pressure ring, 3-nylon sleeve, 4-capsule, 5-first push rod, 6-second metal pressure ring, 7-rolling piston, 8-first reset rod, 9-first sliding bearing, 10-first sealing ring, 11-first sealing push rod, 12. The first spring, 13-the first positioning piece, 14-the first sealing ring, 15-the first copper sleeve, 16-the rolling piston support, 17-the rolling piston O-ring, 18-the lower ear bushing assembly, 19-the second copper sleeve, 20-the upper ear bushing assembly, 21-the valve body, 22-the second sealing ring, 23-the second positioning piece, 24-the pressure-maintaining valve, 25-the oil storage cylinder, 26-the second spring, 27-the second sealing push rod, 28-the valve body O-ring, 29-the second sealing ring, 30-the second sliding bearing, 31-the second reset rod, 32-the second push rod, 33-the shock absorber piston rod, 34-the buffer block, 35-the shock absorber piston rod O-ring, 36-the ear joint, 37-the universal ball steel ball. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and do not limit the scope of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected 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.

[0022] The specific embodiments are as follows: Embodiment 1, as Figure 1-5As shown, the internal valve air spring shock absorber assembly includes an air spring and a shock absorber. The shock absorber includes an oil storage cylinder 25, a shock absorber piston rod 33, an upper lifting ear bushing assembly 20 and a lower lifting ear bushing assembly 18. The lower end of the oil storage cylinder 25 is connected to the lower lifting ear bushing assembly 18, the shock absorber piston rod 33 is telescopically connected in the oil storage cylinder 25, and the upper end of the shock absorber piston rod 33 is connected to the upper lifting ear bushing assembly 20.

[0023] The air spring includes a metal gland 1, a rolling piston 7 and a capsule 4. The metal gland 1 is sleeved on the upper end of the shock absorber piston rod 33, and a shock absorber piston rod O-ring 35 is arranged between the metal gland 1 and the shock absorber piston rod 33. The rolling piston 7 is sleeved on the lower end of the oil storage cylinder 25, supported on a rolling piston support 16 arranged at the lower end of the oil storage cylinder 25, and a rolling piston O-ring 17 is arranged between the lower end of the rolling piston 7 and the oil storage cylinder 25. There is a gap between the rolling piston 7 and the oil storage cylinder 25 at a position above the rolling piston O-ring 17. The upper end of the capsule 4 is sleeved on the outside of the metal gland 1 and fixed by the first metal pressure ring 2; the lower end of the capsule 4 is sleeved on the upper end of the rolling piston 7 and fixed by the second metal pressure ring 6.

[0024] The air spring also includes an intake valve, a first push rod 5, an exhaust valve and a second push rod 32. A nylon sleeve 3 is provided on the inner side of the lower part of the metal gland 1, and a buffer block is provided between the nylon sleeve 3 and the shock absorber piston rod 33. The first push rod 5 is fixedly connected to the right side of the nylon sleeve 3 and extends downward, so as to achieve the synchronous movement of the first push rod 5 and the metal gland 1, and the lower end of the first push rod 5 is suspended in the gap between the rolling piston 7 and the oil storage cylinder 25; the second push rod 32 is fixedly connected to the left side of the nylon sleeve 3 and extends downward, so as to achieve the synchronous movement of the second push rod 32 and the metal gland 1, and the lower end of the second push rod 32 is suspended in the gap between the rolling piston 7 and the oil storage cylinder 25; the length of the second push rod 32 is greater than that of the first push rod 5.

[0025] The intake valve is tiltedly arranged on the right side of the rolling piston 7 and is provided with an airway. The intake valve includes an intake seal, a first spring 12 and a first reset rod 8, all of which are arranged in the airway. The intake seal is slidably connected in the airway and reciprocates to seal or open the airway. The first spring 12 is arranged at one end of the intake seal away from the oil storage cylinder 25, and is used to elastically support the intake seal and enable the intake seal to seal the airway when the intake seal is not subjected to other external forces. The first reset rod 8 abuts against one end of the intake seal close to the oil storage cylinder 25, and the end of the first reset rod 8 can be cantilevered in the gap between the rolling piston 7 and the oil storage cylinder 25. The first reset rod 8 moves toward the direction of the first spring 12 under the pushing action of the first push rod 5, driving the intake seal to move to open the airway.

[0026] The exhaust valve is tiltedly arranged on the left side of the rolling piston 7. The exhaust valve includes a main valve body 21, an exhaust seal arranged in the airway of the valve body 21, a second spring 26 and a second reset rod 31. A valve body O-ring 28 is arranged between the main valve body 21 and the rolling piston 7. The exhaust seal is slidably connected in the airway and reciprocates to achieve sealing and opening of the airway. The second spring 26 is arranged at one end of the exhaust seal away from the oil storage cylinder 25, and is used to elastically support the exhaust seal to open the airway when the exhaust seal is not affected by other external forces. The second reset rod 31 is arranged on the side of the exhaust seal 31 close to the oil storage cylinder 25, and one end of the second reset rod 31 is cantilevered in the gap between the rolling piston 7 and the oil storage cylinder 25. The second reset rod 31 is close to the second spring 26 under the pushing action of the second push rod 32, and the second reset rod 31 pushes the exhaust seal and makes the exhaust seal seal the airway.

[0027] It should be noted that when the capsule 4 is at the standard height, the lower end of the first push rod 5 is above the end of the first reset rod 8, and is in a disengaged state from the first reset rod 8. At this time, the intake valve is closed under the elastic force of the first spring 12; the lower end of the second push rod 32 is below the end of the second reset rod 31, and is abutted against the second reset rod 31, that is, the second push rod 32 is supported between the second reset rod 31 and the side wall of the oil storage cylinder 25, and the second reset rod 31 is squeezed and pushed by the second push rod 32 to approach the second spring 26, so that the exhaust valve is closed.

[0028] When the vehicle body descends and the capsule 4 is compressed below the standard height, the first push rod 5 moves downward and is supported between the first reset rod 8 and the side wall of the oil storage cylinder 25. Under the squeezing action of the first push rod 5, the first reset rod 8 drives the intake seal to approach the first spring 12, so that the intake valve opens to intake air.

[0029] When the vehicle body rises and the capsule 4 is stretched above the standard height, the second push rod 32 moves upward and disengages from the second reset rod 31. At this time, under the elastic support of the second spring 26, the exhaust seal is driven to move toward the second reset rod 31, so that the exhaust valve opens to exhaust.

[0030] When the built-in valve air spring damper assembly of this embodiment is in use, the coordinated action of the intake valve and the first push rod 5, and the coordinated action of the exhaust valve and the second push rod 32, realize that when the capsule 4 is at the standard height, the air spring does not take in or discharge air, and when the capsule 4 is compressed below the standard height, the intake valve is opened to only take in air, and when the capsule 4 is stretched above the standard height, the exhaust valve is opened to only exhaust air. The height valve is integrated inside the air spring, and the height is automatically adjusted by the movement of the vehicle body to achieve inflation and exhaust, which saves the installation of an external height valve, saves time, labor, and cost. In addition, the use of a built-in height valve reduces the probability of damage to the height valve and the cost of the cab suspension assembly and maintenance, improves the working environment of the height valve, and increases its service life.

[0031] Furthermore, a universal ball steel ball 37 is provided at the end of the first reset rod 8 away from the intake seal, and at the end of the second reset rod 31 away from the exhaust seal. The first push rod 5 contacts the universal ball steel ball 37 when the intake valve is opened, and the second push rod 32 contacts the universal ball steel ball 37 when the exhaust valve is closed, thereby reducing friction, ensuring smoothness of contact and separation between the first push rod 5 and the first reset rod 8, and between the second push rod 32 and the second reset rod 31, and extending the service life of the intake valve and the exhaust valve.

[0032] In this embodiment, the lower ends of the first push rod 5 and the second push rod 32 are both configured to be arc-shaped to reduce friction and facilitate operation with the universal ball 37 .

[0033] Furthermore, the first reset rod 8 and the air passage of the intake valve are connected via a first sliding bearing 9, which can play a self-lubricating and wear-resistant role, thereby ensuring that the first reset rod 8 moves in a straight line in the air passage.

[0034] The second reset rod 31 and the air passage of the exhaust valve are connected via a second sliding bearing 30 . The sliding bearing can play a self-lubricating and wear-resistant role, ensuring that the second reset rod 31 moves in a straight line in the air passage.

[0035] Furthermore, the air intake seal comprises a first sealing push rod 11 and a first sealing ring 10. The first sealing ring 10 is sleeved outside the first sealing push rod 11. The first sealing ring 10 is set in a conical shape, and its cone matches the inner conical surface in the airway of the air intake valve. When the first sealing ring 10 moves back and forth, it is close to and away from the inner conical surface to achieve sealing and opening of the airway.

[0036] Furthermore, the air intake valve further includes a first positioning member 13 and a first copper sleeve 15 to ensure the support for the first spring 12. The first positioning member 13 is arranged at the opening of the airway to support the first spring 12, and the outer side of the first positioning member 13 is fixed by the first copper sleeve 15. Furthermore, a first sealing ring 14 is arranged inside the first positioning member 13, and the air intake pipe extends from the first copper sleeve 15 and passes through the first sealing ring 14. The first sealing ring 14 plays a sealing role to prevent the airway from being blocked in harsh environments such as Nisha and others.

[0037] In this embodiment, the first positioning member 13 is positioned by a double-lip buckle sealing ring, and the first sealing ring 14 is a double-lip buckle sealing ring.

[0038] Furthermore, the exhaust seal comprises a second sealing ring 29 and a second sealing push rod 27. The second sealing ring 29 is sleeved on the end of the second reset rod 31, and the second sealing push rod 27 abuts against the end of the second sealing ring 29 close to the second spring 26. The second sealing ring 29 is set in a conical shape, and its cone cooperates with the inner conical surface set in the air passage of the main valve body 21. The second sealing ring 29 moves to be close to and away from the inner conical surface to achieve sealing and opening of the air passage.

[0039] Furthermore, the exhaust valve further includes a second positioning member 23 and a second copper sleeve 19 to ensure the support for the second spring 26. The second positioning member 23 is arranged at the opening of the airway to support the second spring 26, and the outer side of the second positioning member 23 is fixed by the second copper sleeve 19. Furthermore, a second sealing ring 22 is arranged inside the second positioning member 23, and the exhaust pipe extends from the second copper sleeve 19 and passes through the second sealing ring 22. The second sealing ring 22 plays a sealing role to prevent the airway from being blocked in harsh environments such as Nisha and others.

[0040] In this embodiment, the second positioning member 23 is positioned by a double-lip buckle sealing ring, and the second sealing ring 22 is a double-lip buckle sealing ring.

[0041] Furthermore, the exhaust valve further includes a pressure-maintaining valve 24. The pressure-maintaining valve 24 is disposed between the second spring 26 and the second positioning member 23, and is used to automatically close the airway when the air pressure in the capsule 4 is less than a set value, and the exhaust valve stops exhausting, thereby avoiding the phenomenon of too low pressure in the capsule 4. In this embodiment, the minimum pressure value required in the capsule 4 is set to 0.25 MPa, and when the pressure in the capsule 4 is less than 0.25 MPa, the pressure-maintaining valve 24 is closed, and the exhaust valve stops exhausting.

[0042] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. The air spring damper assembly with built-in valve is characterized by: The shock absorber assembly comprises an air spring and a shock absorber, wherein the shock absorber comprises an oil storage cylinder and a shock absorber piston rod telescopically connected to the oil storage cylinder; the air spring comprises a metal gland sleeved on the piston rod, a rolling piston sleeved on the oil storage cylinder, and a capsule connecting the metal gland and the rolling piston; the air spring further comprises an intake valve arranged on one side of the rolling piston, a first push rod cooperating with the intake valve, an exhaust valve arranged on the other side of the rolling piston, and a second push rod cooperating with the exhaust valve; the first push rod and the second push rod are both arranged in the gap between the rolling piston and the oil storage cylinder, and can move synchronously with the metal gland; The intake valve comprises an intake seal for sealing an air passage, a first elastic member arranged at one end of the intake seal to give the intake seal an elastic force to seal the air passage, and a first reset rod arranged at the other end of the intake seal and used to push the intake seal to move and open; The exhaust valve comprises an exhaust seal for sealing the airway, a second elastic member arranged at one end of the exhaust seal to give the exhaust seal an elastic force to open the airway, and a second reset rod arranged at the other end of the exhaust seal and used to push the exhaust seal to move and seal the airway; The ends of the first sealing push rod and the second sealing push rod partially extend into the gap between the rolling piston and the oil storage cylinder; When the capsule is at a standard height, the first push rod and the first reset rod are in a disengaged state, and the second push rod and the second reset rod are in an abutted state, that is, the intake valve and the exhaust valve are both in a closed state; when the capsule is compressed below the standard height, the first push rod moves downward with the metal pressure cover, the lower end of the first push rod passes through the gap between the first reset rod and the oil storage cylinder, and forces the first reset rod to move, and the first reset rod pushes the intake seal to open the airway to achieve air intake; when the capsule is stretched above the standard height, the second push rod moves upward with the metal pressure cover, the second push rod disengages from the second reset rod upward, the second reset rod is released and moves a certain distance toward the oil storage cylinder, and the elastic force of the second elastic member supports the exhaust seal to move to open the airway to achieve exhaust.

2. The internal valve air spring damper assembly according to claim 1, characterized in that: A first universal ball is arranged at the end of the first reset rod away from the intake seal, and the first push rod contacts the first universal ball when opening the intake valve.

3. The internal valve air spring damper assembly according to claim 2, characterized in that: The first reset rod is telescopically connected in the air passage of the intake valve via a sliding bearing.

4. The internal valve air spring damper assembly according to claim 3, characterized in that: The intake seal comprises a first sealing push rod and a first sealing ring sleeved outside the first sealing push rod; the first sealing ring is conical and matches with the inner conical surface in the air passage of the intake valve.

5. The internal valve air spring damper assembly according to claim 4, characterized in that: The air intake valve further comprises a first positioning member which is arranged at the airway opening and is used to support the first elastic member, and a first copper sleeve which is used to fix the first positioning member.

6. The internal valve air spring damper assembly according to any one of claims 1 to 5, characterized in that: A second universal ball is disposed at the end of the second reset rod away from the exhaust seal. When the second push rod drives the exhaust valve to close, the second push rod abuts between the second universal ball and the oil storage cylinder.

7. The internal valve air spring damper assembly according to claim 6, characterized in that: The second reset rod is telescopically connected in the air passage of the exhaust valve via a sliding bearing.

8. The internal valve air spring damper assembly according to claim 7, characterized in that: The exhaust seal is a second sealing ring sleeved on the end of the second reset rod and a second sealing push rod abutting against the second sealing ring; the second sealing ring is conical and matches with the inner conical surface in the airway of the exhaust valve.

9. The internal valve air spring damper assembly according to claim 8, characterized in that: The exhaust valve further comprises a second positioning member which is arranged at the airway opening and is used to support the second elastic member, and a second copper sleeve which is used to fix the second positioning member.

10. The internal valve air spring damper assembly according to claim 9, characterized in that: The exhaust valve further comprises a pressure-maintaining valve disposed between the second elastic member and the second positioning member, and is configured to automatically close when the air pressure in the capsule is less than a set value, and the exhaust valve stops exhausting air.

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