Shock absorber and automobile

Abstract

The application discloses a shock absorber and a car. The shock absorber comprises an upper support, a spring pad, a coil spring, a damper and a piston assembly. The damper is connected with the spring pad. The piston assembly comprises a piston rod, a buffer structure, a piston, a piston baffle and an outer cylinder. The upper end of the piston rod is connected with the upper support, and the lower end of the piston rod is connected with the damper. The piston rod penetrates through the buffer structure, and the buffer structure is located above the damper. The piston rod penetrates through the piston, and the piston is located above the buffer structure. The piston rod penetrates through the piston baffle, and the piston baffle is located above the piston. The piston rod penetrates through the outer cylinder, and the piston rod is fixedly connected with the top of the outer cylinder. The piston and the piston baffle are located in the outer cylinder. The first high-pressure chamber is formed between the piston baffle and the top of the inner cavity of the outer cylinder. The second high-pressure chamber is formed between the piston baffle and the piston. The piston baffle is provided with a communication hole. The first high-pressure chamber is communicated with the second high-pressure chamber through the communication hole.

Description

Technical Field

[0001] This application relates to the field of automotive vibration reduction technology, and in particular to a vibration damper and an automobile. Background Technology

[0002] Shock absorbers in a car's suspension system provide support when the car rolls. Each shock absorber contains a buffer structure and a damper. When the car rolls, the buffer structure contacts the damper, providing support, preventing the roll angle from increasing, and absorbing some vibrations to ensure ride stability. However, common shock absorbers have the following drawbacks: if the gap between the buffer structure and the damper is too large, they cannot make contact during roll and thus fail to suppress it; if the gap is too small, the buffer structure frequently impacts the damper, affecting ride stability and shortening the lifespan of the buffer structure. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, this application provides a shock absorber and an automobile, and the technical solution adopted is as follows.

[0004] This application provides a car whose suspension system is equipped with shock absorbers.

[0005] The vibration damper provided in this application includes an upper support, a spring pad, a coil spring, a damper, and a piston assembly. The damper is connected to the spring pad, and the coil spring is sleeved on the piston assembly, with its upper and lower ends respectively abutting against the upper support and the spring pad. The piston assembly includes a piston rod, a buffer structure, a piston, a piston baffle, and an outer cylinder. The upper end of the piston rod is connected to the upper support, and the lower end of the piston rod is connected to the damper. The piston rod passes through the buffer structure, which is located above the damper. A piston rod passes through the piston, which is located above the buffer structure; a piston rod passes through the piston baffle, which is located above the piston; the piston rod passes through the outer cylinder, and is fixedly connected to the top of the outer cylinder; the piston and the piston baffle are located inside the outer cylinder; wherein, a first high-pressure chamber is formed between the piston baffle and the top of the inner cavity of the outer cylinder, and a second high-pressure chamber is formed between the piston baffle and the piston; the piston baffle is provided with a connecting hole, and the first high-pressure chamber communicates with the second high-pressure chamber through the connecting hole.

[0006] In some embodiments of this application, the piston rod is provided with an air intake channel, the inlet of the air intake channel is located at the top of the piston rod, and the air intake channel is connected to the first high-pressure chamber.

[0007] In some embodiments of this application, the buffer structure is fixedly connected to the piston.

[0008] In some embodiments of this application, the piston is sealed to the outer side wall of the piston rod and the inner side wall of the outer cylinder, respectively.

[0009] In some embodiments of this application, the piston baffle is sealed to the outer side wall of the piston rod and the inner side wall of the outer cylinder, respectively.

[0010] In some embodiments of this application, the piston rod extends through the top of the outer cylinder and is threadedly connected to the outer cylinder.

[0011] In some embodiments of this application, the piston rod includes a first rod structure and a second rod structure. The first rod structure is connected to the damper, the lower end of the second rod structure is connected to the first rod structure, the outer cylinder is connected to the second rod structure, the second rod structure is provided with the air intake channel, and the air intake channel has an opening in the side wall of the second rod structure.

[0012] In some embodiments of this application, the piston rod includes a third rod structure, the lower end of which is connected to the second rod structure, and the top end of which is provided with an air inlet.

[0013] In some embodiments of this application, the air inlet is connected to an air pump.

[0014] The embodiments of this application have at least the following beneficial effects: When a vehicle tilts, high-pressure gas is introduced into the first high-pressure chamber, and the high-pressure gas enters the second high-pressure chamber from the first high-pressure chamber. The piston moves downward along the piston rod so that the buffer structure can maintain contact with the damper, thereby suppressing vehicle tilt. When the vehicle is driving normally, a vacuum is drawn in the first and second high-pressure chambers, and the piston moves upward along the piston rod so that the buffer structure moves upward, maintaining a certain gap between the buffer structure and the damper to prevent impact and ensure ride comfort. This application can be widely applied in the field of automotive vibration reduction technology. Attached Figure Description

[0015] The aspects and advantages described and / or appended to the embodiments of this application will become apparent and readily understood in conjunction with the following drawings. It should be noted that the embodiments illustrated in the following drawings are exemplary and are used only to explain this application, and should not be construed as limiting this application.

[0016] Figure 1 This is a structural diagram of a vibration damper.

[0017] Figure 2 This is a cross-sectional view of the vibration damper.

[0018] Figure 3This is a structural diagram of the piston assembly.

[0019] Reference numerals: 111, upper support; 112, spring pad; 113, coil spring; 120, damper; 200, piston assembly; 210, piston rod; 211, first rod structure; 212, second rod structure; 213, third rod structure; 214, air intake passage; 220, buffer structure; 230, piston; 240, piston baffle; 250, outer cylinder; 251, first high-pressure chamber; 252, second high-pressure chamber. Detailed Implementation

[0020] The following is combined with Figures 1 to 3 The embodiments of this application are described in detail below, examples of which are illustrated 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. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings is solely for the convenience of describing this application and simplifying the description, and does 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, and therefore should not be construed as a limitation of this application. Features defined with "first" and "second" are used to distinguish feature names and do not have special meanings. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] This application relates to an automobile whose suspension system is equipped with shock absorbers. When the automobile tilts, the shock absorbers are compressed as a whole to provide support, ensuring that the tilt angle of the vehicle does not increase further and improving driving stability.

[0024] Other components and operations of automobiles are already described in the relevant art for those skilled in the art, and will not be described in detail here. The structure of the shock absorber will be introduced below.

[0025] This application relates to a vibration damper, which includes an upper support 111, a spring pad 112, a coil spring 113, a damper 120, and a piston assembly 200. The damper 120 is connected to the spring pad 112, and the coil spring 113 is sleeved on the piston assembly 200. The upper and lower ends of the coil spring 113 abut against the upper support 111 and the spring pad 112, respectively. The coil spring 113 provides elastic support to the upper support 111. The upper and lower ends of the piston assembly 200 are connected to the upper support 111 and the spring pad 112, respectively. When the vibration damper is compressed, the piston assembly 200 can move synchronously.

[0026] Furthermore, the piston assembly 200 includes a piston rod 210, a buffer structure 220, a piston 230, a piston baffle 240, and an outer cylinder 250. The upper end of the piston rod 210 is connected to the upper support 111, and the lower end of the piston rod 210 is connected to the damper 120. Furthermore, the piston rod 210 passes through the buffer structure 220, the piston 230, and the piston baffle 240, respectively. The piston 230 and the buffer structure 220 are slidably connected to the outer sidewall of the piston rod 210, and the outer side of the piston 230 is slidably connected to the inner sidewall of the outer cylinder 250.

[0027] Referring to the attached diagram, the buffer structure 220 is located above the damper 120, the piston 230 is located above the buffer structure 220, and the piston baffle 240 is located above the piston 230. The piston 230 and piston baffle 240 are located within the outer cylinder 250, which has an opening at the bottom and a top wall at the top. It can be understood that when the shock absorber is compressed as a whole, the buffer structure 220 contacts the damper 120, providing support. When the vehicle is not tilting, the buffer structure 220 separates from the damper 120, maintaining a certain distance to ensure passenger comfort.

[0028] Furthermore, a first high-pressure chamber 251 is formed between the piston baffle 240 and the top of the inner cavity of the outer cylinder 250, and a second high-pressure chamber 252 is formed between the piston baffle 240 and the piston 230. The piston baffle 240 is provided with multiple connecting holes, which are distributed circumferentially. The first high-pressure chamber 251 communicates with the second high-pressure chamber 252 through the connecting holes. High-pressure gas is introduced into the first high-pressure chamber 251, and the high-pressure gas enters the second high-pressure chamber 252 through the connecting holes. The piston 230 moves downward and abuts against the buffer structure 220, which in turn abuts against the damper 120. It can be understood that under the action of high-pressure gas, the piston 230 is driven to move downward along the piston rod 210, shortening the distance between the piston 230 and the damper 120, thus reducing the range of motion of the buffer structure 220 above the damper 120.

[0029] It is understandable that the piston baffle 240 is fixedly connected to the outer cylinder 250. Specifically, the piston baffle 240 is welded and fixed to the inner wall of the outer cylinder 250.

[0030] Furthermore, the piston rod 210 penetrates the outer cylinder 250 and is fixedly connected to the top of the outer cylinder 250. Specifically, the top of the outer cylinder 250 is provided with a through hole, through which the piston rod 210 passes. In some examples, the piston rod 210 penetrates the top of the outer cylinder 250 and is threadedly connected to the outer cylinder 250. The through hole at the top of the outer cylinder 250 is provided with an internal thread, and the piston rod 210 is provided with an external thread, thereby achieving a threaded connection between the piston rod 210 and the top of the outer cylinder 250.

[0031] In one implementation, the buffer structure 220 is fixedly connected to the piston 230. Specifically, the lower side of the piston 230 is fixedly connected to the top of the buffer structure 220 by vulcanization. In this case, a gap is left between the buffer structure 220 and the damper 120. Under the action of high-pressure gas, the buffer structure 220 and the piston 230 move downward along the piston rod 210, allowing the buffer structure 220 to move freely along the piston rod 210. This allows for free adjustment of the distance between the buffer structure 220 and the damper 120, enhancing the buffer structure 220's ability to suppress vehicle roll. In related technologies, the gap between the buffer structure and the damper cannot be adjusted, which may result in the buffer structure and damper failing to make contact or the buffer structure frequently impacting the damper.

[0032] Understandably, when a car tilts, the amount of high-pressure gas introduced into the first high-pressure chamber 251 and the second high-pressure chamber 252 is increased, increasing the chamber pressure so that the buffer structure 220 moves downward, the gap between the buffer structure 220 and the damper 120 becomes smaller, or the buffer structure 220 comes into contact with the damper 120.

[0033] In some examples, the buffer structure 220 is made of polyurethane or rubber material, which can effectively absorb some of the vibration and improve the ride smoothness.

[0034] In one embodiment, an air intake channel 214 is provided in the piston rod 210, with the inlet of the air intake channel 214 located at the top of the piston rod 210. An air pump is connected to the air intake channel 214 via a pipeline, and the air intake channel 214 connects to the first high-pressure chamber 251. Referring to the attached drawings, a drilled hole is provided on the side of the piston rod 210, and the air intake channel 214 connects to the first high-pressure chamber 251 through the drilled hole.

[0035] In some examples, the piston rod 210 includes a first rod structure 211 and a second rod structure 212, with the first rod structure 211 located at the lower part of the piston rod 210. Referring to the accompanying drawings, the first rod structure 211 is connected to the damper 120, and the lower end of the second rod structure 212 is connected to the first rod structure 211. Specifically, the lower end of the second rod structure 212 is connected to the first rod structure 211 by friction welding. It is understood that the second rod structure 212 is provided with an air intake channel 214, which forms an opening in the side wall of the second rod structure 212, thereby connecting the air intake channel 214 to the first high-pressure chamber 251.

[0036] Furthermore, the outer cylinder 250 is connected to the second rod structure 212, and it is understood that the second rod structure 212 is provided with external threads.

[0037] Referring to the accompanying drawings, the piston rod 210 includes a third rod structure 213, which is located at the upper part of the piston rod 210. The upper end of the second rod structure 212 is connected to the third rod structure 213, and the lower end of the third rod structure 213 is connected to the second rod structure 212. Specifically, the upper end of the second rod structure 212 is connected to the third rod structure 213 by friction welding. It can be understood that the intake passage 214 extends from the third rod structure 213 to the second rod structure 212. Furthermore, an intake port is provided at the top of the third rod structure 213.

[0038] Furthermore, the air inlet is connected to an air pump.

[0039] In some examples, the first rod structure 211 is set as a solid structure, while the second rod structure 212 and the third rod structure 213 are set as hollow rod structures.

[0040] In some examples, the piston baffle 240 is sealed to the outer side wall of the piston rod 210 and the inner side wall of the outer cylinder 250, respectively, to ensure the airtightness of the first high-pressure chamber 251.

[0041] In some examples, the piston 230 is sealed to the outer wall of the piston rod 210 and the inner wall of the outer cylinder 250, respectively, to ensure the airtightness of the second high-pressure chamber 252.

[0042] In one embodiment, the piston assembly 200 includes a dust cover fitted over the outer side of the outer cylinder 250, with the upper and lower ends of the dust cover connected to an upper support 111 and a damper 120, respectively. Further, the dust cover includes a bellows to facilitate tension or compression.

[0043] The contents of this application are described in detail below with reference to specific embodiments. It should be noted that the following description is merely illustrative and not a specific limitation of this application.

[0044] During vehicle movement, the vehicle uses a roll angle sensor to detect the vehicle's roll status, and the ECU suspension controller receives the signal from the roll angle sensor.

[0045] When the vehicle tilts, the ECR outputs current, the air pump starts working, and high-pressure gas enters the first high-pressure chamber 251 and the second high-pressure chamber 252. The piston 230 and the buffer structure 220 move downward, reducing the gap between the buffer structure 220 and the damper 120. The buffer structure 220 contacts the top of the damper 120 to prevent the shock absorber from continuing to compress, thereby suppressing the occurrence of tilt.

[0046] When the vehicle is not tilted, the air pump draws a vacuum, and the buffer structure 220 and piston 230 move upward. The piston 230 moves to the position of abutting the piston baffle 240, maintaining a large gap between the damper 120 and the buffer structure 220, so as to avoid the buffer structure 220 being frequently impacted and to avoid affecting the driving smoothness of the vehicle.

[0047] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms 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.

[0048] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

[0049] In the description of this application, the presence of a comma ("、") in the patent title indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A and B", it means that the content claimed in this application is: a technical solution with the subject matter title A and a technical solution with the subject matter title B.

Claims

1. A vibration damper, characterized in that: The piston assembly includes an upper support (111), a spring pad (112), a coil spring (113), a damper (120), and a piston assembly (200). The damper (120) is connected to the spring pad (112), and the coil spring (113) is sleeved on the piston assembly (200), with its upper and lower ends abutting against the upper support (111) and the spring pad (112), respectively. The piston assembly (200) includes... The piston rod (210) has its upper end connected to the upper support (111) and its lower end connected to the damper (120). A buffer structure (220) through which the piston rod (210) passes, the buffer structure (220) being located above the damper (120); A piston (230) has a piston rod (210) passing through it, and the piston (230) is located above the buffer structure (220). A piston baffle (240) is provided, through which the piston rod (210) passes, and the piston baffle (240) is located above the piston (230). The outer cylinder (250) has a piston rod (210) that passes through it. The piston rod (210) is fixedly connected to the top of the outer cylinder (250). The piston (230) and the piston baffle (240) are located in the outer cylinder (250). The piston (230) and the buffer structure (220) are located inside the outer cylinder (250). A first high-pressure chamber (251) is formed between the piston baffle (240) and the top of the inner cavity of the outer cylinder (250). A second high-pressure chamber (252) is formed between the piston baffle (240) and the piston (230). The piston baffle (240) is provided with a connecting hole, and the first high-pressure chamber (251) is connected to the second high-pressure chamber (252) through the connecting hole.

2. The vibration damper according to claim 1, characterized in that: The piston rod (210) is provided with an air intake channel (214), the inlet of the air intake channel (214) is located at the top of the piston rod (210), and the air intake channel (214) is connected to the first high-pressure chamber (251).

3. The vibration damper according to claim 1, characterized in that: The buffer structure (220) is fixedly connected to the piston (230).

4. The vibration damper according to claim 1, characterized in that: The piston (230) is sealed to the outer side wall of the piston rod (210) and the inner side wall of the outer cylinder (250).

5. The vibration damper according to claim 1, characterized in that: The piston baffle (240) is sealed to the outer side wall of the piston rod (210) and the inner side wall of the outer cylinder (250), respectively.

6. The vibration damper according to claim 1, characterized in that: The piston rod (210) passes through the top of the outer cylinder (250) and is threadedly connected to the outer cylinder (250).

7. The vibration damper according to claim 2, characterized in that: The piston rod (210) includes a first rod structure (211) and a second rod structure (212). The first rod structure (211) is connected to the damper (120). The lower end of the second rod structure (212) is connected to the first rod structure (211). The outer cylinder (250) is connected to the second rod structure (212). The second rod structure (212) is provided with the air intake channel (214), and the air intake channel (214) forms an opening in the side wall of the second rod structure (212).

8. The vibration damper according to claim 7, characterized in that: The piston rod (210) includes a third rod structure (213), the lower end of which is connected to the second rod structure (212), and the top end of which is provided with an air inlet.

9. The vibration damper according to claim 8, characterized in that: The air inlet is connected to an air pump.

10. A car, characterized in that: The vehicle's suspension system is equipped with a shock absorber as described in any one of claims 1 to 9.

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