A high-pressure oil-gas spring combined sealing system

Abstract

The present invention discloses a combined sealing system for a high-pressure oil-gas spring, belonging to the technical field of oil-gas elastic suspension devices. It is characterized by including a main guide sleeve member, two groups of sub-guide sleeve members and a component mounting plate. Left and right hinge supports are respectively arranged on the left and right sides of the main guide outer sleeve. The two groups of sub-guide sleeve members are respectively a left sub-guide sleeve member and a right sub-guide sleeve member. One ends of the left sub-guide sleeve member and the right sub-guide sleeve member are respectively hinged on the left hinge support and the right hinge support, and the other ends of the left sub-guide sleeve member and the right sub-guide sleeve member are installed on the component mounting plate through an elastic buffer connection device. The present invention can improve the sealing performance of the oil-gas suspension system and solve the problem of easy external oil leakage of traditional oil-gas hybrid suspensions; at the same time, the suspension elasticity can be flexibly adjusted as needed to adapt to different road conditions and driving conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil-gas elastic suspension devices, and particularly relates to a high-pressure oil-gas spring combined sealing system component. Background Art

[0002] Oil-gas suspension is an important elastic buffer component of heavy vehicles. When the vehicle is loaded with heavy loads, the elastic buffer capacity directly affects the smoothness and comfort of vehicle driving. Oil-gas suspension components with unqualified quality or performance will also affect the driving safety of the vehicle. There are many problems with traditional oil-gas suspensions, such as oil leakage in the decompression oil circuit, air leakage in the decompression air circuit, or catastrophic permanent failure caused by extreme pressure bearing. In addition, due to the complex and diverse driving conditions of vehicles, during driving, it not only has to withstand bumps in the vertical direction, but also is subject to lateral resistance when moving forward or backward. The traditional suspension structure cannot achieve multi-directional buffering functions.

[0003] In view of this, the applicant has designed a high-pressure oil-gas spring combined sealing system, which can solve the above technical problems, improve the durability and reparability of the oil-gas suspension system, and at the same time make the suspension elasticity flexibly adjustable according to needs to adapt to different road conditions and driving conditions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-pressure oil-gas spring combined sealing system, which improves the sealing performance of the oil-gas suspension system and solves the problem of easy external oil leakage of traditional oil-gas hybrid suspensions; at the same time, the suspension elasticity can be flexibly adjusted according to needs to adapt to different road conditions and driving conditions.

[0005] To solve the above technical problems, the technical solution of the present invention is: to provide a high-pressure oil-gas spring combined sealing system, which is characterized by including a main guide sleeve member, two groups of sub-guide sleeve members and a component mounting plate. Left and right hinge supports are respectively arranged on the left and right sides of the main guide outer sleeve. The two groups of sub-guide sleeve members are respectively a left sub-guide sleeve member and a right sub-guide sleeve member. One ends of the left sub-guide sleeve member and the right sub-guide sleeve member are respectively hinged on the left hinge support and the right hinge support, and the other ends of the left sub-guide sleeve member and the right sub-guide sleeve member are installed on the component mounting plate through an elastic buffer connection device.

[0006] Preferably, the main guide sleeve member includes a main guide outer sleeve, a main guide piston and a sealing device. The upper end of the main guide outer sleeve is closed and the lower end is open. An oil injection hole is provided on the upper end wall or side wall of the main guide outer sleeve; the upper end of the main guide piston is hermetically inserted into the open end of the main guide outer sleeve, the upper end of the sealing device is hermetically connected to the outer peripheral wall of the main guide outer sleeve, and the lower end of the sealing device is hermetically connected to the lower outer peripheral wall of the main guide piston.

[0007] Preferably, the sealing device includes a cylindrical sealing rubber sleeve. At the upper end of the sealing rubber sleeve, there is provided more than one set of anti - detachment ridges with a circular cross - section. On the outer peripheral wall of the main guiding outer sleeve, a fixed outer ring body is provided. On the lower bottom surface of the fixed outer ring body, a side - strip receiving groove with an open lower end is opened. On the outer side wall of the side - strip receiving groove, more than three expansion pores are spacedly opened. On the outer side wall surface of the side - strip receiving groove, an external thread is provided; an upper tightening nut is installed on the outer periphery of the side - strip receiving groove through thread meshing; when the upper tightening nut is tightened on the outer side wall of the side - strip receiving groove, the expansion gap on the outer side wall is tightened simultaneously, so that the outer peripheral wall of the side - strip receiving groove tightly clamps the upper edge of the sealing rubber sleeve;

[0008] The lower end of the sealing rubber sleeve is closed to an inner diameter smaller than the outer diameter of the outer peripheral wall of the lower end of the main guiding piston. An expansion ring is sleeved on the outer peripheral wall of the closed lower end of the sealing rubber sleeve, and a strip - shaped expansion gap is provided on the expansion ring; on the outer peripheral wall of the lower end of the main guiding piston, an external thread is provided, and a lower tightening nut is installed at the lower end of the main guiding piston through the external thread. The lower tightening nut includes a nut part and a tightening ring part, and the tightening ring part and the nut part are coaxially arranged; when the nut part of the lower tightening nut is tightened upward, the tightening ring part can tightly seal and squeeze the sealing rubber sleeve on the outer peripheral wall of the lower end of the main guiding piston by squeezing the expansion ring;

[0009] A strip - shaped oil - returning blind hole is opened at the insertion end of the main guiding piston. The upper end of the oil - returning blind hole is open, and a pressure - switch valve is provided at this open end; a piston oil - outlet strip hole is opened at the lower end of the main guiding piston. One end of the piston oil - outlet strip hole communicates with the oil - returning blind hole, and the other end of the oil - outlet strip hole communicates with the inside of the cylindrical sealing rubber sleeve;

[0010] An oil - returning hole is opened at the lower bending part of the cylindrical sealing rubber sleeve, and the oil - returning hole is connected to an oil - returning storage bin through an oil - return pipe.

[0011] Preferably, the auxiliary guiding sleeve member includes an auxiliary guiding outer sleeve and an auxiliary guiding piston. One end of the auxiliary guiding outer sleeve is closed and the other end is open; one end of the auxiliary guiding piston is inserted and arranged inside the auxiliary guiding outer sleeve; an inflatable diaphragm body is arranged at the middle position inside the auxiliary guiding outer sleeve. An inflatable through - hole is opened on the middle side wall of the auxiliary guiding outer sleeve, and the air - filling pipe of the inflatable diaphragm body passes through the inflatable through - hole and extends out of the auxiliary guiding outer sleeve; elastic balloons are respectively arranged on both sides of the inflatable diaphragm body; a lubricating grease is coated on the inner peripheral wall of the auxiliary guiding outer sleeve; the outer - extending end of the auxiliary guiding piston is hinged to a left hinged support or a right hinged support; the upper end of the auxiliary guiding outer sleeve is hinged to an elastic buffer connecting device.

[0012] Preferably, the elastic buffer connecting device includes an elastic buffer block. Elastic buffer chutes are opened on the lower bottom surfaces on the left and right sides of the component mounting plate. The elastic buffer block is horizontally arranged in the elastic buffer chutes, and both ends of the elastic buffer block are respectively connected to the front and rear side walls of the elastic buffer chutes through elastic buffer springs.

[0013] Preferably, mounting plate hinge supports are provided at both ends of the component mounting plate.

[0014] Preferably, a main guiding through hole is opened in the middle of the component mounting plate. When the main guiding outer sleeve moves upward to the upper limit under an upward impact force, it can be inserted into the main guiding through hole, but there will be no collision interference between the main guiding outer sleeve and the component mounting plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The present invention can improve the sealing performance of the oil-gas suspension system and solve the problem of easy oil leakage outside the traditional oil-gas hybrid suspension. At the same time, the suspension elasticity can be flexibly adjusted as needed to adapt to different road conditions and driving conditions.

[0017] When the vehicle is traveling while loaded with heavy loads, the main guiding sleeve member and the two groups of sub-guiding sleeve members can work together to buffer the impact force. When the vehicle encounters up and down bumps, the main guiding sleeve member plays a major anti-seismic role. When the up and down bumps are too large, the two groups of sub-guiding sleeve members can share the impact force at the same time. If the impact force is too large and the oil pressure in the main guiding outer sleeve of the main guiding sleeve member is too high, the pressure switch valve will be activated, and the oil in the main guiding outer sleeve will flow into the inside of the sealing rubber sleeve through the oil return blind hole and the oil outlet strip hole, and then through the oil return hole, it will be connected to the oil return storage bin through the oil return pipe. This structure realizes the ultimate protection of the main guiding sleeve member and prevents it from failing under instantaneous impact. The oil flowing back to the oil return storage bin can also be injected back into the injection hole through the injection oil pump and the injection oil pipe and return to the main guiding sleeve member again.

[0018] In addition, vehicle maintenance personnel can regularly check the main guiding sleeve member and adjust the elasticity of the oil-gas suspension system by adjusting the oil injection volume. By providing the cylindrical sealing rubber sleeve, the present invention solves the defect of oil leakage outside the traditional oil cylinder buffer device and can collect the flowing back or seeping oil for reuse.

[0019] When the vehicle encounters impacts from the front or the rear, the impact force can be resisted and absorbed by the sub-guiding sleeve members on both sides. While protecting the main guiding sleeve member, the impact resistance of the vehicle is improved, and the operation is safer and more stable. The sub-guiding sleeve member described in the present invention uses a combination of an elastic balloon and an inflatable diaphragm body to prevent the situation that the pneumatic buffer member is prone to being flaccid or bursting during use. Coating lubricating grease on the inner peripheral wall of the sub-guiding outer sleeve can reduce the friction between the elastic balloon and the inflatable diaphragm body and the inner wall during contraction and expansion, and extend the service life. In addition, the staff can also adjust the elastic force of the sub-guiding sleeve member by controlling the inflation amount of the inflatable diaphragm body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is Figure 1 an enlarged view of part A of

[0022] Figure 3 is Figure 1 an enlarged view of part B of

[0023] Figure 4 is Figure 1 an enlarged view of part C of

[0024] Markings in the figure: 1. Elastic buffer spring; 2. Elastic buffer block; 3. Elastic buffer chute; 4. Component mounting plate; 5. Main guide outer sleeve; 6. Main guide through hole; 7. Pressure switch valve; 8. Oil injection hole; 9. Mounting plate hinge support; 10. Oil return blind hole; 11. Piston oil outlet strip hole; 12. Sealing rubber sleeve; 13. Main guide piston; 14. Oil return hole; 15. Inflatable tube; 17. Elastic balloon; 18. Inflatable diaphragm body; 19. Sub-guide outer sleeve; 21. Sub-guide piston; 22. Anti-detachment rib; 23. Fixed outer ring body; 24. Edge strip groove; 25. Upper tightening nut; 26. Expansion pore; 27. Expansion ring; 28. Lower tightening nut; 29. Right hinge support; 30. Left hinge support. Specific embodiments

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] As Figures 1-4 shown, a high-pressure oil and gas spring combined sealing system according to the present invention includes a main guide sleeve member, two sets of sub-guide sleeve members, and a component mounting plate. Left and right hinge supports are respectively arranged on the left and right sides of the main guide outer sleeve. The two sets of sub-guide sleeve members are respectively a left sub-guide sleeve member and a right sub-guide sleeve member. One ends of the left sub-guide sleeve member and the right sub-guide sleeve member are respectively hinged to the left hinge support and the right hinge support, and the other ends of the left sub-guide sleeve member and the right sub-guide sleeve member are installed on the component mounting plate through an elastic buffer connection device.

[0027] The main guide sleeve member includes a main guide outer sleeve, a main guide piston, and a sealing device. The upper end of the main guide outer sleeve is closed and the lower end is open. An oil injection hole is provided on the upper top wall or side wall of the main guide outer sleeve; the upper end of the main guide piston is hermetically inserted into the open end of the main guide outer sleeve, the upper end of the sealing device is hermetically connected to the outer peripheral wall of the main guide outer sleeve, and the lower end of the sealing device is hermetically connected to the lower outer peripheral wall of the main guide piston.

[0028] The sealing device includes a cylindrical sealing rubber sleeve. At the upper end of the sealing rubber sleeve, there is a set of more than one anti - detachment convex strip with a circular cross - section. On the outer peripheral wall of the main guiding outer sleeve, a fixed outer ring body is provided. On the lower bottom surface of the fixed outer ring body, a side - strip receiving groove with an open lower end is opened. On the outer side wall of the side - strip receiving groove, more than three expansion pores are spacedly opened. On the outer side wall surface of the side - strip receiving groove, an external thread is provided; an upper tightening nut is installed on the outer periphery of the side - strip receiving groove through thread engagement; when the upper tightening nut is tightened on the outer side wall of the side - strip receiving groove, the expansion gap on the outer side wall is tightened at the same time, so that the outer peripheral wall of the side - strip receiving groove tightly clamps the upper edge of the sealing rubber sleeve.

[0029] The lower end of the sealing rubber sleeve is closed to an inner diameter smaller than the outer diameter of the outer peripheral wall of the lower end of the main guiding piston. An expansion ring is sleeved on the outer peripheral wall of the closed lower end of the sealing rubber sleeve, and a strip - shaped expansion gap is provided on the expansion ring; an external thread is provided on the outer peripheral wall of the lower end of the main guiding piston, and a lower tightening nut is installed at the lower end of the main guiding piston through thread. The lower tightening nut includes a nut part and a tightening ring part, and the tightening ring part and the nut part are coaxially arranged; when the nut part of the lower tightening nut is tightened upward, the tightening ring part can tightly seal and squeeze the sealing rubber sleeve on the outer peripheral wall of the lower end of the main guiding piston by squeezing the expansion ring.

[0030] A strip - shaped oil - return blind hole is opened at the insertion end of the main guiding piston. The upper end of the oil - return blind hole is open, and a pressure - switch valve is provided at this open end; a piston oil - outlet strip hole is opened at the lower end of the main guiding piston. One end of the piston oil - outlet strip hole communicates with the oil - return blind hole, and the other end of the oil - outlet strip hole communicates with the inside of the cylindrical sealing rubber sleeve.

[0031] An oil - return hole is opened at the lower bending part of the cylindrical sealing rubber sleeve, and the oil - return hole is connected to an oil - return storage bin through an oil - return pipe.

[0032] The auxiliary guiding sleeve component includes an auxiliary guiding outer sleeve and an auxiliary guiding piston. One end of the auxiliary guiding outer sleeve is closed and the other end is open; one end of the auxiliary guiding piston is inserted and arranged inside the auxiliary guiding outer sleeve; an inflatable diaphragm body is arranged at the middle position inside the auxiliary guiding outer sleeve. An inflatable through - hole is opened on the middle side wall of the auxiliary guiding outer sleeve, and the inflatable tube of the inflatable diaphragm body passes through the inflatable through - hole and extends out of the auxiliary guiding outer sleeve; elastic balloons are respectively arranged on both sides of the inflatable diaphragm body; lubricating grease is coated on the inner peripheral wall of the auxiliary guiding outer sleeve; the outer extending end of the auxiliary guiding piston is hinged to a left hinged support or a right hinged support; the upper end of the auxiliary guiding outer sleeve is hinged to an elastic buffer connecting device.

[0033] The elastic buffer connecting device includes an elastic buffer block. Elastic buffer chutes are opened on the lower bottom surfaces on the left and right sides of the component mounting plate. The elastic buffer block is horizontally arranged in the elastic buffer chutes, and both ends of the elastic buffer block are respectively connected to the front and rear side walls of the elastic buffer chutes through elastic buffer springs.

[0034] Install mounting plate hinge supports at both ends of the component mounting plate.

[0035] Open a main guiding through hole in the middle of the component mounting plate. When the main guiding outer sleeve moves upward to the upper limit under an upward impact force, it can be inserted into the main guiding through hole, but there will be no collision interference between the main guiding outer sleeve and the component mounting plate.

[0036] When this device is in use, the component mounting plate can be installed on the vehicle frame through the mounting plate hinge supports at both ends, and the lower end of the main guiding piston is connected to the vehicle suspension. When the vehicle is traveling while loaded with heavy loads, the main guiding sleeve component and the two sets of sub-guiding sleeve components can work together to buffer the impact force. When the vehicle encounters up and down bumps, the main guiding sleeve component plays a major role in earthquake resistance. When the up and down bumps are too large, the two sets of sub-guiding sleeve components can share the impact force at the same time; if the impact force is too large and the oil pressure in the main guiding outer sleeve of the main guiding sleeve component is too high, the pressure switch valve will be activated, causing the oil in the main guiding outer sleeve to flow into the interior of the sealing rubber sleeve along the oil return blind hole and the oil outlet strip hole, and then through the oil return hole, it is connected to the oil return storage bin through the oil return pipe. This structure realizes the ultimate protection of the main guiding sleeve component and prevents it from failing under instantaneous impact. The oil flowing back to the oil return storage bin can also be injected back into the oil injection hole and return to the main guiding sleeve component again through the oil injection pump and the oil injection pipe. In addition, vehicle maintenance personnel can regularly check the main guiding sleeve component and adjust the elasticity of the oil and gas suspension system by adjusting the oil injection volume. By setting the cylindrical sealing rubber sleeve, the present invention solves the defect of external oil leakage of the traditional oil cylinder buffer device and can collect the oil flowing back or seeping out for reuse.

[0037] When the vehicle encounters impacts from the front or rear, it can resist and absorb the impact force through the sub-guiding sleeve components on both left and right sides. While protecting the main guiding sleeve component, it improves the impact resistance of the vehicle and makes the operation safer and more stable. The sub-guiding sleeve component described in the present invention uses a combination of an elastic balloon and an inflatable diaphragm body to prevent the situation that the pneumatic buffer component is prone to being flaccid or bursting during use. Coating lubricating grease on the inner peripheral wall of the sub-guiding outer sleeve can reduce the friction between the elastic balloon and the inflatable diaphragm body and the inner wall during contraction and expansion, and extend the service life; in addition, the staff can also adjust the elastic force of the sub-guiding sleeve component by controlling the inflation volume of the inflatable diaphragm body.

[0038] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may combine, change or modify the above-disclosed technical content to form an equivalent embodiment of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A combined sealing system for a high-pressure oil-gas spring, characterized in that it includes a main guide sleeve member, two sets of sub-guide sleeve members and an assembly mounting plate. Left and right hinge supports are respectively arranged on the left and right sides of the main guide sleeve member. The two sets of sub-guide sleeve members are respectively a left sub-guide sleeve member and a right sub-guide sleeve member. One ends of the left sub-guide sleeve member and the right sub-guide sleeve member are respectively hinged on the left hinge support and the right hinge support, and the other ends of the left sub-guide sleeve member and the right sub-guide sleeve member are installed on the assembly mounting plate through an elastic buffer connection device; The main guide sleeve member includes a main guide outer sleeve, a main guide piston and a sealing device. The upper end of the main guide outer sleeve is closed and the lower end is open. An oil injection hole is arranged on the upper top wall or side wall of the main guide outer sleeve; the upper end of the main guide piston is hermetically inserted into the open end of the main guide outer sleeve. The upper end of the sealing device is hermetically connected to the outer peripheral wall of the main guide outer sleeve, and the lower end of the sealing device is hermetically connected to the lower outer peripheral wall of the main guide piston; The sealing device includes a cylindrical sealing rubber sleeve. One or more anti-detachment convex strips with a circular cross-section are arranged at the upper end of the sealing rubber sleeve. A fixed outer ring body is arranged on the outer peripheral wall of the main guide outer sleeve. An edge strip receiving groove with an open lower end is opened on the lower bottom surface of the fixed outer ring body. More than three expansion pores are spacedly opened on the outer side wall of the edge strip receiving groove. External threads are arranged on the outer side wall surface of the edge strip receiving groove; an upper tightening nut is installed on the outer periphery of the edge strip receiving groove through external thread engagement; when the upper tightening nut is tightened on the outer side wall of the edge strip receiving groove, the expansion pores on the outer side wall are tightened at the same time, so that the outer peripheral wall of the edge strip receiving groove tightly clamps the upper edge of the sealing rubber sleeve; The lower end of the sealing rubber sleeve is constricted to an inner diameter smaller than the outer diameter of the lower outer peripheral wall of the main guide piston. An expansion ring is sleeved on the constricted outer peripheral wall at the lower end of the sealing rubber sleeve. A strip-shaped expansion gap is arranged on the expansion ring; external threads are arranged on the outer peripheral wall at the lower end of the main guide piston, and a lower tightening nut is installed at the lower end of the main guide piston through external threads. The lower tightening nut includes a nut part and a tightening ring part. The tightening ring part and the nut part are coaxially arranged; when the nut part of the lower tightening nut is tightened upward, the tightening ring part can tightly seal the sealing rubber sleeve on the lower outer peripheral wall of the main guide piston by squeezing the expansion ring; A strip-shaped oil return blind hole is opened at the insertion end of the main guide piston. The upper end of the oil return blind hole is open, and a pressure switch valve is arranged at this open end; a piston oil outlet strip hole is opened at the lower end of the main guide piston. One end of the piston oil outlet strip hole communicates with the oil return blind hole, and the other end of the oil outlet strip hole communicates with the inside of the cylindrical sealing rubber sleeve; An oil return hole is opened at the lower bending part of the cylindrical sealing rubber sleeve. The oil return hole is connected to an oil return storage bin through an oil return pipe.

2. The combined sealing system for a high-pressure oil-gas spring according to claim 1, characterized in that: The auxiliary guide sleeve member includes an auxiliary guide outer sleeve and an auxiliary guide piston. One end of the auxiliary guide outer sleeve is closed and the other end is open. One end of the auxiliary guide piston is inserted into the auxiliary guide outer sleeve. An inflatable diaphragm body is arranged at the middle position inside the auxiliary guide outer sleeve. An inflatable through hole is opened on the middle side wall of the auxiliary guide outer sleeve. The inflatable tube of the inflatable diaphragm body passes through the inflatable through hole and extends out of the auxiliary guide outer sleeve. Elastic balloons are respectively arranged on both sides of the inflatable diaphragm body. A lubricating grease is coated on the inner peripheral wall of the auxiliary guide outer sleeve. The extended end of the auxiliary guide piston is hinged to the left hinge support or the right hinge support. The upper end of the auxiliary guide outer sleeve is hinged to the elastic buffer connection device.

3. The high-pressure oil-gas spring combined sealing system according to claim 2, characterized in that: The elastic buffer connection device includes an elastic buffer block. Elastic buffer chutes are opened on the lower bottom surfaces on the left and right sides of the component mounting plate. The elastic buffer block is horizontally arranged in the elastic buffer chutes. Both ends of the elastic buffer block are respectively connected to the front and rear side walls of the elastic buffer chutes through elastic buffer springs.

4. The high-pressure oil-gas spring combined sealing system according to claim 3, characterized in that: Mounting plate hinge supports are arranged at both ends of the component mounting plate.

5. The high-pressure oil-gas spring combined sealing system according to claim 4, characterized in that: A main guide through hole is opened in the middle of the component mounting plate. When the main guide outer sleeve moves upward to the upper limit under an upward impact force, it can be inserted into the main guide through hole, but there will be no collision interference between the main guide outer sleeve and the component mounting plate.

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