Novel hydro-pneumatic suspension
The novel hydropneumatic suspension design with composite hydropneumatic control solves the buffering problem of traditional suspension systems under different loads and road conditions, achieving flexible lifting and lowering of the suspension and excellent load-bearing capacity and comfort, thus improving the reliability and durability of the suspension.
Patent Information
- Application Number
- CN202520715253.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Traditional suspension systems struggle to meet the buffering needs under different loads and road conditions, often resulting in insufficient load-bearing capacity in 'soft suspension' or poor comfort in 'hard suspension'.
The new type of hydropneumatic suspension, which adopts composite hydropneumatic control, achieves flexible lifting of the suspension through the combined design of hydraulic cylinder liners, hydraulic pistons, air films and buffer blocks. It also enhances load-bearing capacity and comfort by combining pneumatic and hydraulic control.
It achieves excellent buffering performance of the suspension under different loads and road conditions, taking into account both load-bearing capacity and comfort, and improving the reliability and durability of the suspension.
Smart Images
Figure CN223919058U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of suspension lifting, buffering and shock absorption technology for passenger cars, buses, commercial vehicles and construction machinery, specifically to a new type of oil-gas suspension. Background Technology
[0002] In the field of vehicle engineering, the suspension system is a core component affecting ride comfort, handling stability, and load adaptability. Traditional suspensions mostly use a combination of mechanical springs and hydraulic shock absorbers. They absorb road impacts through the elastic deformation of the springs and dissipate vibration energy through hydraulic damping.
[0003] However, since the stiffness of mechanical springs is fixed, it is difficult to meet the buffering needs under different loads and road conditions, which can easily lead to problems such as insufficient load-bearing capacity of "soft suspension" or poor comfort of "hard suspension". Utility Model Content
[0004] (I) Problems to be solved
[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a new type of oil-gas suspension that is easy to promote and use and is operated by composite oil-gas control.
[0006] (II) Technical Solution
[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a novel hydropneumatic suspension, including an outer cylinder and an upper sealing cover and a lower sealing cover connected to the top and bottom of the outer cylinder;
[0008] The outer cylinder is also provided with an air film that abuts against the upper and lower sealing covers, and a hydraulic cylinder sleeve fitted inside the air film is provided between the upper and lower sealing covers.
[0009] A hydraulic piston is slidably connected inside the hydraulic cylinder liner. A buffer block is also sleeved on the top of the hydraulic piston. A shock absorber support rod extending to the outer end of the lower sealing cover is connected to the lower end of the hydraulic piston.
[0010] The upper end of the hydraulic cylinder liner has several liquid holes, a hydraulic oil cavity is formed between the outer wall of the hydraulic cylinder liner and the air film, and an air cavity is formed between the air film and the outer cylinder.
[0011] As an improvement, the outer wall of the outer cylinder is also connected to an air injection port that communicates with the air cavity. The upper sealing cover, the lower sealing cover and the outer cylinder are connected by a bolt hole, and a venting plug is connected inside the bolt hole.
[0012] As an improvement, both the upper and lower sealing covers are provided with oil inlets that communicate with the hydraulic oil chamber, and sealing plugs are connected to the oil inlets.
[0013] As an improvement, a sealing ring is also provided between the hydraulic piston and the hydraulic cylinder liner.
[0014] As an improvement, the buffer block is made of rubber.
[0015] (III) Beneficial Effects
[0016] The advantages of this utility model compared with the prior art are as follows: In this application, high-pressure air is used to compress liquid, and the liquid drives the hydraulic cylinder to realize a spring with better flexible lifting of the suspension. At the same time, the air bag adopts an inner bladder type (with an outer metal shell), which greatly improves the reliability and durability of the air spring. It can adopt both hydraulic control and pneumatic control methods, which can greatly improve the spring's load-bearing capacity. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of a new type of hydropneumatic suspension cross-section.
[0018] Figure 2 This is a schematic diagram of a new type of hydro-gas suspension.
[0019] As shown in the figure: 1. Outer cylinder; 2. Upper sealing cover; 3. Lower sealing cover; 4. Air film; 5. Hydraulic cylinder liner; 6. Hydraulic piston; 7. Buffer block; 8. Shock absorber support rod; 9. Liquid hole; 10. Hydraulic oil chamber; 11. Air chamber; 12. Air injection port; 13. Bolt hole; 14. Air vent plug; 15. Oil injection port; 16. Sealing bolt; 17. Sealing ring. Detailed Implementation
[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.
[0021] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.
[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0025] Please refer to the appendix carefully. Figure 1-2 A novel hydropneumatic suspension includes an outer cylinder 1 and an upper sealing cover 2 and a lower sealing cover 3 connected to the top and bottom of the outer cylinder 1.
[0026] In use, the outer cylinder 1 is also provided with an air film 4 that abuts against the upper sealing cover 2 and the lower sealing cover 3, and a hydraulic cylinder liner 5 is provided between the upper sealing cover 2 and the lower sealing cover 3 and fitted inside the air film 4.
[0027] For support purposes, a hydraulic piston 6 is slidably connected inside the hydraulic cylinder liner 5. A buffer block 7 is also sleeved on the top of the hydraulic piston 6. A shock absorber support rod 8 extending to the outer end of the lower sealing cover 3 is connected to the lower end of the hydraulic piston 6.
[0028] When oil and gas are used in combination, several liquid holes 9 are formed at the upper end of the hydraulic cylinder liner 5, a hydraulic oil cavity 10 is formed between the outer wall of the hydraulic cylinder liner 5 and the air film 4, and an air cavity 11 is formed between the air film 4 and the outer cylinder 1.
[0029] The outer wall of the outer cylinder 1 is also connected to an air inlet 12 that communicates with the air cavity 11. The upper sealing cover 2, the lower sealing cover 3 and the outer cylinder 1 are connected by a bolt hole 13. A vent plug 14 is connected inside the bolt hole 13. Both the upper sealing cover 2 and the lower sealing cover 3 are connected to the hydraulic oil cavity 10 by an oil inlet 15. A sealing plug 16 is connected to the oil inlet 15.
[0030] To ensure the normal operation of the hydraulic system, a sealing ring 17 is provided between the hydraulic piston 6 and the hydraulic cylinder liner 5, and the buffer block 7 is made of rubber for cushioning.
[0031] In practical use:
[0032] Chassis lifting and lowering function: Hydraulic oil fills the hydraulic oil chamber through the oil inlet and vents gas through the vent plug. High-pressure gas enters the air chamber through the vent port. The high-pressure air pushes the air film, which in turn pushes the hydraulic oil, which in turn pushes the hydraulic piston. The hydraulic piston drives the shock absorber support rod, moving it downwards along the hydraulic cylinder liner, thereby stretching the spring and lifting the chassis.
[0033] Conversely, if the gas volume is reduced, the chassis will lower. If the vehicle space allows, and the hydraulic cylinder liner is made long enough, a large lifting distance (≥200mm) can be achieved. Existing air springs cannot achieve a large extension distance due to the lack of a high-hardness outer shell and guide cylinder liner.
[0034] During the cushioning process, the force transmitted from the tire causes the shock absorber support rod to move upward. The shock absorber support rod then drives the hydraulic piston, which in turn pushes the liquid in the hydraulic oil chamber. The liquid is compressed, causing the air film to move outward, thereby compressing the air and achieving the shock absorption function.
[0035] This application can also be used with dual control, featuring both 10 hydraulic oil chambers and 11 air chambers. It can employ pneumatic control, hydraulic control, or a combination of both. Pneumatic control achieves excellent comfort and chassis dynamic performance, hydraulic control provides better load-bearing capacity, and the combination of both allows for a balance between comfort and load-bearing capacity.
[0036] In this application, the upper sealing cap is made of lightweight metal or non-metal materials, such as aluminum alloy, high-strength steel, carbon fiber, etc., which have good strength and rigidity, can compress the air film, prevent oil and gas leakage, and does not deform within 18 bar atmospheric pressure.
[0037] Outer cylinder: Made of lightweight metal or non-metal materials, such as aluminum alloy, high-strength steel, carbon fiber, etc., with good strength and rigidity, able to compress the air film, prevent oil and air leakage, and not deform within 18 bar atmospheric pressure;
[0038] Air film: This can be a single-layer or multi-layer structure, made of highly elastic rubber or other materials. The elastic deformation of the air film is not less than 55%. The inner layer is an oil-resistant layer to prevent hydraulic oil erosion, dissolution, and diffusion. An intermediate partition layer prevents oil and air from mixing. The outer air-resistant layer resists oxidation, aging, and corrosion. It must also provide a good seal with the upper sealing cap, outer cylinder, and lower sealing cap. It only needs to withstand 18 bar atmospheric pressure without deformation.
[0039] Because the air membrane is an internal bladder with an external protective shell, it is resistant to scratches and bursts, greatly improving the reliability and durability of the air spring. Simultaneously, the pressure inside and outside the air membrane is equal, thus the air membrane tension requirement is not high, significantly simplifying the manufacturing process and reducing costs. Furthermore, the air membrane is stressed by an air ring, which has a large stress-bearing area, allowing for a lower stiffness, controllable within 2.5–4 Hz / mm, resulting in superior cushioning performance. In contrast, typical air springs are stressed by upper and lower air columns, with a relatively smaller stress-bearing area and a stiffness of 3–10 Hz / mm.
[0040] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0041] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A new oil- gas suspension, characterized by: The outer cylinder (1) is connected with the upper sealing cover (2) and the lower sealing cover (3) at the top and the bottom of the outer cylinder (1); The outer cylinder (1) is further provided with an air film (4) abutting against the upper sealing cover (2) and the lower sealing cover (3), and a hydraulic cylinder sleeve (5) sleeved in the air film (4) is arranged between the upper sealing cover (2) and the lower sealing cover (3); The hydraulic cylinder sleeve (5) is slidably connected with a hydraulic piston (6), the top of the hydraulic piston (6) is further sleeved with a buffer block (7), and the lower end of the hydraulic piston (6) is connected with a shock absorber support rod (8) extending to the outer end of the lower sealing cover (3); The upper end of the hydraulic cylinder sleeve (5) is formed with a plurality of liquid holes (9), the outer wall of the hydraulic cylinder sleeve (5) and the air film (4) form a hydraulic oil cavity (10), and the air film (4) and the outer cylinder (1) form an air cavity (11).
2. A novel hydro-pneumatic suspension as claimed in claim 1, wherein: The outer wall of the outer cylinder (1) is further connected with an air injection port (12) in communication with the air cavity (11), the upper sealing cover (2), the lower sealing cover (3) and the outer cylinder (1) are connected through a bolt port (13), and a gas release screw plug (14) is arranged in the bolt port (13).
3. A new oil-gas suspension according to claim 1 or 2, characterized in that: The upper sealing cover (2) and the lower sealing cover (3) are both provided with an oil injection port (15) in communication with the hydraulic oil cavity (10), and a sealing plug (16) is arranged on the oil injection port (15).
4. A novel hydro-pneumatic suspension as claimed in claim 3, wherein: The hydraulic piston (6) and the hydraulic cylinder sleeve (5) are further provided with a sealing ring (17).
5. A new oil gas suspension as claimed in claim 1, wherein: The buffer block (7) is made of rubber.