Oil-gas suspension mechanism and vehicle

Abstract

The invention discloses an oil-gas suspension mechanism and a vehicle, and relates to the technical field of vehicle oil-gas suspension, and comprises two guide arms, two oil-gas cylinders and an energy storage device; the two guide arms are arranged on the left and right sides of a frame relatively, one end of the guide arm is connected to the frame through a first bracket, and the middle part of the guide arm is connected to the axle through a U-bolt; the two oil-gas cylinders are arranged on the left and right sides of the frame relatively, the cylinder bodies of the oil-gas cylinders are connected to the frame through a second bracket, and the piston rods of the oil-gas cylinders are hinged to the other ends of the guide arms; the energy storage device is fixed to the frame through a third bracket and connected to the oil-gas cylinders.

Description

Technical Field

[0001] This invention relates to the field of vehicle hydropneumatic suspension technology, specifically a hydropneumatic suspension mechanism and vehicle. Background Technology

[0002] GB7258-2017 stipulates that all dangerous goods transport semi-trailers with a gross vehicle weight ≥ 12000 kg should be equipped with air suspension on the rear axle. With the implementation of GB7258-2017, air suspension has been widely used in recent years. Air-bag type air suspension has relatively ideal variable stiffness characteristics, but it has disadvantages such as low load capacity, large size, and susceptibility to aging and damage. Currently, hydro-air suspension is mainly used in mining dump trucks and military vehicles. The hydro-air suspension presented in this invention has a simple structure and meets the load-bearing and vibration reduction requirements of vehicles under both empty and full load conditions. Summary of the Invention

[0003] In view of the deficiencies in the existing technology, the purpose of this invention is to provide an oil-gas suspension mechanism and vehicle, which uses liquid as a medium to compress inert gas to achieve the vehicle's load-bearing and vibration-damping functions, and achieves the vehicle's load-bearing and vibration-damping adaptability under different loads by adjusting the gas pressure values ​​of the high-pressure chamber and low-pressure chamber in the accumulator.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a hydropneumatic suspension mechanism, installed between the vehicle frame and the axle of a vehicle axle structural unit, comprising two guide arms, two hydropneumatic cylinders, and an energy storage device; the two guide arms are arranged opposite to each other on the left and right sides of the vehicle frame, one end of each guide arm is connected to the vehicle frame via a first bracket, and the middle part of the guide arm is connected to the axle via a U-bolt; the two hydropneumatic cylinders are arranged opposite to each other on the left and right sides of the vehicle frame, the cylinder body of each hydropneumatic cylinder is connected to the vehicle frame via a second bracket, and the piston rod of each hydropneumatic cylinder is hinged to the other end of the guide arm; the energy storage device is fixed to the vehicle frame via a third bracket and connected to the hydropneumatic cylinder.

[0005] Based on the above technical solution, the energy storage device can be one or two; when there is one energy storage device, two oil cylinders on the left and right sides of the frame are connected in parallel with the energy storage device through oil pipes; when there are two energy storage devices, the two energy storage devices are arranged opposite to each other on the left and right sides of the frame and are connected to a corresponding oil cylinder through oil pipes, and the two oil cylinders are connected through oil pipes.

[0006] Based on the above technical solution, when there are two energy storage devices, two oil pipes are provided. One oil pipe connects the rod chamber of the left oil cylinder to the rodless chamber of the right oil cylinder, and then connects to the corresponding energy storage device; the other oil pipe connects the rod chamber of the right oil cylinder to the rodless chamber of the left oil cylinder, and then connects to the corresponding other energy storage device.

[0007] Based on the above technical solution, the oil-gas cylinder is a double-cylinder oil-gas spring cylinder.

[0008] Based on the above technical solution, the energy storage device consists of two independent energy storage units, each energy storage unit including a first air chamber and a first oil chamber. The first oil chambers of the two energy storage units are respectively connected to the oil chambers of the oil-air cylinder through oil pipes.

[0009] Based on the above technical solution, the accumulator is an integrated accumulator. Two pistons are arranged opposite each other inside the accumulator, dividing the interior of the accumulator into a second oil chamber located between the two pistons and two second air chambers located on both sides. The second oil chamber is connected to the oil chamber of the oil-air cylinder through an oil pipe.

[0010] Based on the above technical solution, the guide arm passes around from above or below the axle.

[0011] Based on the above technical solution, a limiting mechanism is also included. The axle is connected to the vehicle frame through a lateral stabilizer bar and a lateral stabilizer bar bracket. The limiting mechanism is fixed between the vehicle frame and the axle housing by bolts.

[0012] The present invention also discloses a vehicle in which the axle structure unit is provided with the above-described hydropneumatic suspension mechanism.

[0013] Based on the above technical solution, the vehicle has at least two bridge structure units connected in sequence, and each bridge structure unit is equipped with the oil-gas suspension mechanism as described above.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention uses two dual-cylinder pneumatic spring cylinders (symmetrically arranged on the left and right sides) as the basic structural unit on a single axle. Utilizing the inherent nonlinear stiffness and nonlinear damping characteristics of the dual-cylinder pneumatic spring cylinders, ideal elastic properties are achieved to meet the load-bearing and vibration-damping requirements of the suspension system under different vehicle loads. Using liquid as a medium, inert gas is compressed to achieve the vehicle's load-bearing and vibration-damping functions. The adaptability of the load-bearing and vibration-damping functions under different vehicle loads is achieved by adjusting the gas pressure values ​​in the high-pressure and low-pressure chambers within the accumulator. Attached Figure Description

[0016] Figure 1 This is a front view of the hydropneumatic suspension mechanism in Embodiment 1 of the present invention;

[0017] Figure 2 This is a top view of the hydropneumatic suspension mechanism in Embodiment 1 of the present invention;

[0018] Figure 3 This is a schematic diagram of the energy storage device in Embodiment 1 of the present invention;

[0019] Figure 4This is a front view of the hydropneumatic suspension mechanism in Embodiment 2 of the present invention;

[0020] Figure 5 This is a top view of the hydropneumatic suspension mechanism in Embodiment 2 of the present invention;

[0021] Figure 6 This is a schematic diagram of the energy storage device in Embodiment 2 of the present invention;

[0022] Figure 7 This is a schematic diagram showing the connection between the energy storage device and the oil-gas cylinder in Embodiment 2 of the present invention;

[0023] Figure 8 This is a schematic diagram of the vehicle structure in this invention.

[0024] Figure label:

[0025] 1-Frame; 11-Axle;

[0026] 2-Guide arm; 21-First bracket;

[0027] 3-Oil / pneumatic cylinder; 31-Second bracket;

[0028] 4-Energy storage device; 41-Oil pipe; 42-Accumulator; 421-First air chamber; 422-First oil chamber; 423-Piston; 424-Second oil chamber; 425-Second air chamber; 43-Third support;

[0029] 5-Limiting mechanism. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0031] In the description of this invention, it should be noted that the directional terms such as "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0033] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and its beneficial effects clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the invention. Example

[0034] See Figure 1 and Figure 2 As shown, this embodiment of the invention provides a hydropneumatic suspension mechanism, which is installed between the frame 1 and the axle 11 of the vehicle axle structure unit, including two guide arms 2, two hydropneumatic cylinders 3 and an energy storage device 4; the axle can be a drive axle or a follow-up axle.

[0035] Two guide arms 2 are arranged opposite each other on the left and right sides of the frame 1. One end of the guide arm 2 is connected to the frame 1 through the first bracket 21, and the middle part of the guide arm 2 is connected to the axle 11 through a U-bolt.

[0036] Two hydraulic cylinders 3 are arranged opposite each other on the left and right sides of the frame 1. The cylinder body of the hydraulic cylinder 3 is connected to the frame 1 through the second bracket 31. The piston rod of the hydraulic cylinder 3 is hinged to the other end of the guide arm 2.

[0037] The energy storage device 4 is fixed to the vehicle frame 1 via a third bracket 43 and connected to the hydraulic cylinder 3. Specifically, two hydraulic cylinders on the left and right sides of the vehicle frame are connected in parallel to the energy storage device via oil pipes. When the road conditions are relatively flat, one energy storage unit can be saved compared to embodiment 2.

[0038] See Figure 3 As shown, the energy storage device 4 consists of two independent accumulators 42. Each accumulator 42 includes a first air chamber 421 and a first oil chamber 422. The first oil chambers 422 of the two accumulators are respectively connected to the oil chambers of the hydraulic cylinder 3 via oil pipes 41. In this embodiment, the accumulator 42 is a two-stage pressure accumulator, which can be a conventional piston or a pneumatic accumulator. The filling pressures of the A and B air chambers of the two accumulators can be different.

[0039] Specifically, the guide arm 2 passes over the axle 11, and the structural shape of the guide arm can be adjusted as needed.

[0040] Specifically, the oil-gas suspension mechanism also includes a limiting mechanism 5. The axle 11 is connected to the frame 1 through a lateral stabilizer bar and a lateral stabilizer bar bracket. The stabilizer bar is approximately perpendicular to the longitudinal beam of the frame, and a stabilizer bar upper bracket is provided on the inner side of the frame. The limiting mechanism 5 is fixed between the frame 1 and the axle housing of the axle 11 by bolts. Example

[0041] See Figure 4 and Figure 5 As shown, this embodiment of the invention provides a hydropneumatic suspension mechanism, which is installed between the vehicle frame 1 and the axle 11 of the vehicle axle structure unit, including two guide arms 2, two hydropneumatic cylinders 3 and two energy storage devices 4; the axle can be a drive axle or a follow-up axle.

[0042] Two guide arms 2 are arranged opposite each other on the left and right sides of the frame 1. One end of the guide arm 2 is connected to the frame 1 through the first bracket 21, and the middle part of the guide arm 2 is connected to the axle 11 through a U-bolt.

[0043] Two hydraulic cylinders 3 are arranged opposite each other on the left and right sides of the frame 1. The cylinder body of the hydraulic cylinder 3 is connected to the frame 1 through the second bracket 31. The piston rod of the hydraulic cylinder 3 is hinged to the other end of the guide arm 2.

[0044] Two energy storage devices 4 are fixed to the frame 1 via a third bracket 43 and connected to the hydraulic cylinders 3. Specifically, the two energy storage devices 4 are arranged opposite each other on the left and right sides of the frame 1, and are connected to a corresponding hydraulic cylinder 3 via oil pipes 41. The two hydraulic cylinders 3 are connected by oil pipes 41. In this embodiment, two oil pipes 41 are provided. One oil pipe 41 connects the rod chamber of the left hydraulic cylinder 3 to the rodless chamber of the right hydraulic cylinder 3, and then connects to the corresponding energy storage device 4; the other oil pipe 41 connects the rod chamber of the right hydraulic cylinder 3 to the rodless chamber of the left hydraulic cylinder 3, and then connects to the corresponding other energy storage device 4. The hydraulic cylinder 3 is a double-cylinder hydraulic spring cylinder. It is suitable for situations where the road conditions are uneven and the vehicle speed is high.

[0045] See Figure 6 As shown, the accumulator 42 is an integrated accumulator with two pistons 423 arranged opposite each other inside. This divides the accumulator 42 into a second oil chamber 424 located between the two pistons 423 and two second gas chambers 425 located on either side. The second oil chamber 424 is connected to the oil chamber of the oil-gas cylinder 3 via an oil pipe 41. The two second gas chambers 425 are filled with nitrogen at different pressures. In this embodiment, the accumulator 42 is a two-stage pressure accumulator, which can be a conventional piston accumulator.

[0046] Specifically, the guide arm 2 passes under the axle 11, and the structural shape of the guide arm can be adjusted as needed.

[0047] Specifically, the oil-gas suspension mechanism also includes a limiting mechanism 5. The axle 11 is connected to the frame 1 through a lateral stabilizer bar and a lateral stabilizer bar bracket. The limiting mechanism 5 is fixed between the frame 1 and the axle housing of the axle 11 by bolts.

[0048] See Figure 7 As shown, this embodiment of the invention also discloses a vehicle, the axle structure unit of which is provided with the above-described hydropneumatic suspension mechanism. Specifically, the vehicle has at least two sequentially connected axle structure units, each axle structure unit being provided with the above-described hydropneumatic suspension mechanism.

[0049] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] This invention is not limited to the embodiments described above. Those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention. Contents not described in detail in this specification are prior art known to those skilled in the art.

Claims

1. A hydro-pneumatic suspension mechanism, installed between a vehicle frame (1) and a vehicle axle (11) of a vehicle axle structure unit, characterized in that: It comprises two guide arms (2), two oil and gas cylinders (3) and an energy storage device (4); Two guide arms (2) are arranged opposite to each other on the left and right sides of the vehicle frame (1); one end of the guide arm (2) is connected to the vehicle frame (1) via a first bracket (21); and the middle of the guide arm (2) is connected to the vehicle axle (11) via a U-bolt; The two oil and gas cylinders (3) are arranged on the left and right sides of the frame (1) relative to each other, the cylinder bodies of the oil and gas cylinders (3) are connected to the frame (1) via a second bracket (31), and the piston rods of the oil and gas cylinders (3) are hinged to the other end of the guide arm (2); The energy storage device (4) is fixed to the vehicle frame (1) via a third bracket (43) and is connected to the oil and gas cylinder (3); There are two energy storage devices (4); the two energy storage devices (4) are arranged on the left and right sides of the vehicle frame (1) relative to each other, and are connected to a corresponding oil and gas cylinder (3) via an oil pipe (41); the two oil and gas cylinders (3) are connected via the oil pipe (41); The energy storage device (4) is provided with two oil pipes (41), one of which connects the rod chamber of the left oil and gas cylinder (3) with the rodless chamber of the right oil and gas cylinder (3), and is then connected to the corresponding energy storage device (4); the other oil pipe (41) connects the rod chamber of the right oil and gas cylinder (3) with the rodless chamber of the left oil and gas cylinder (3), and is then connected to another corresponding energy storage device (4); The energy storage device (4) is two independent energy accumulators (42); The accumulator (42) is an integrated accumulator (42). Two pistons (423) are arranged opposite to each other in the accumulator (42), dividing the interior of the accumulator (42) into a second oil chamber (424) located between the two pistons (423) and two second air chambers (425) located on both sides. The second oil chamber (424) is connected to the oil chamber of the oil and gas cylinder (3) through an oil pipe (41), and the two second air chambers (425) are respectively filled with nitrogen of different pressures.

2. The oil-gas suspension mechanism according to claim 1, characterized in that: The oil-gas cylinder (3) is a double-cylinder oil-gas spring cylinder.

3. The oil-gas suspension mechanism according to claim 1, characterized in that: The guide arm (2) bypasses the axle (11) from above or below.

4. The oil-gas suspension mechanism according to claim 1, characterized in that: It also includes a limiting mechanism (5), the axle (11) is connected to the frame (1) via a lateral stabilizer bar and a lateral stabilizer bar bracket, and the limiting mechanism (5) is fixed between the frame (1) and the bridge housing of the axle (11) via bolts.

5. A vehicle, characterized in that: The bridge structure unit of the vehicle is provided with an oil-gas suspension mechanism as described in any one of claims 1-4.

6. The vehicle according to claim 5, characterized in that: The vehicle has at least two bridge structure units connected in sequence, and each bridge structure unit is provided with an oil-gas suspension mechanism as described in any one of claims 1-4.

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