Linear motor shock absorber

Abstract

The utility model discloses a linear motor shock absorber, belongs to the field of vehicle shock absorbers, and aims to improve the shock absorption performance adjusting capability. Comprising an upper connecting structure, a spring, an oil storage barrel, a working cylinder and a piston rod, the bottom end of the working cylinder is connected with a compression valve, the working cylinder and the compression valve are arranged in the oil storage barrel, a sliding pair is formed between the piston in the working cylinder and the working cylinder in the axial direction of the working cylinder, the top end of the piston rod is connected to the upper connecting structure, and the bottom end is inserted into the working cylinder and connected to the piston; the spring is telescopically arranged in the vertical direction and is connected between the upper connecting structure and the oil storage barrel; the device is characterized in that the outer wall of the oil storage cylinder is connected with a permanent magnet; the periphery of the oil storage cylinder is sleeved with a motor shell, and a motor coil is arranged on the inner wall of the motor shell; and the motor shell is movably matched with the motor shell along the vertical direction. A traditional shock absorber is integrated with the linear motor to form a brand-new linear motor shock absorber, the driving stability and comfort can be improved, and the linear motor shock absorber can achieve rapid and accurate control over a vehicle suspension system.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle shock absorbers, in particular to a linear motor shock absorber. Background Art

[0002] With the rapid development of the automotive industry, vehicle performance improvements are no longer limited to power and fuel economy. Comfort, safety, and intelligence have also become important indicators of the quality of modern vehicles. Shock absorbers, as key components connecting the vehicle body and wheels, play a vital role in the vehicle's ride smoothness, handling stability, and ride comfort.

[0003] Conventional shock absorbers such as Figure 1 As shown, the shock absorber comprises an upper connecting structure 1, a spring 2, an oil reservoir 3, a working cylinder 5, and a piston rod 8. The bottom end of the working cylinder 5 is connected to a compression valve 11. The working cylinder 5 and the compression valve 11 are located within the oil reservoir 3. A piston is located within the working cylinder 5, forming a sliding pair with the working cylinder 5 along its axial direction. The piston rod 8 is connected to the upper connecting structure 1 at its top end and inserted into the working cylinder 5 at its bottom end to connect to the piston. The spring 2 is arranged to extend vertically and is connected between the upper connecting structure 1 and the oil reservoir 3. The upper connecting structure 1 is mounted to the vehicle body, and the bottom end of the oil reservoir 3 is mounted to the vehicle frame. During vehicle motion, the oil reservoir 3 moves up and down, generating relative motion with the piston rod 8, generating a corresponding damping force in the internal stroke oil circuit, and driving the spring 2 to move up and down. However, the performance adjustment range of such a shock absorber is limited, making it difficult to adapt to complex and changing driving conditions. Utility Model Content

[0004] The purpose of the utility model is to provide a linear motor vibration damper to improve the performance adjustment capability.

[0005] The technical solution adopted by the present invention is: a linear motor shock absorber, including an upper connecting structure, a spring, an oil storage barrel, a working cylinder and a piston rod, the bottom end of the working cylinder is connected to a compression valve, the working cylinder and the compression valve are arranged in the oil storage barrel, and a piston is arranged in the working cylinder, and the piston forms a sliding pair with the working cylinder along the axial direction of the working cylinder, the top end of the piston rod is connected to the upper connecting structure, and the bottom end is inserted into the working cylinder and connected to the piston; the spring is arranged to be telescopically arranged along the vertical direction and connected between the upper connecting structure and the oil storage barrel; it is characterized in that: a permanent magnet is connected to the outer wall of the oil storage barrel; a motor housing is sleeved on the outer periphery of the oil storage barrel, and a motor coil is arranged on the inner wall of the motor housing; the motor housing is movably matched with the motor housing along the vertical direction.

[0006] Furthermore, the top end of the motor housing is fixed to the upper connecting structure.

[0007] Furthermore, the piston is an adjustable built-in valve.

[0008] Furthermore, the piston rod is a hollow rod, and the valve coil of the adjustable built-in valve passes through the hollow inner cavity of the piston rod and is led out from the top opening of the piston rod.

[0009] Furthermore, the spring is arranged on the outer periphery of the motor housing.

[0010] Furthermore, a tray is fixed on the outer wall of the oil storage cylinder, the top end of the spring is connected to the upper connecting structure, and the bottom end is connected to the tray.

[0011] Furthermore, a vertically penetrating connecting hole is provided at the center position of the upper connecting structure, and the top end of the piston rod is inserted into the connecting hole.

[0012] The beneficial effects of the present invention are as follows: By integrating a linear motor into a traditional shock absorber, the present invention creates a new linear motor shock absorber, which helps improve driving stability and comfort. The linear motor shock absorber enables precise control of the vehicle's suspension system. An electronic controller adjusts the shock absorber's response in real time, providing improved vehicle stability and comfort. This precise control enables the vehicle to more effectively absorb and mitigate impacts and vibrations from the road during driving, significantly reducing vibration and bumps on bumpy roads and improving the ride experience. The linear motor electromagnetic suspension offers rapid response and precise control, capable of adjusting the shock absorber's state within milliseconds. This rapid response allows the vehicle to promptly respond to road irregularities and unexpected situations, thereby improving vehicle handling and safety. Furthermore, the linear motor shock absorber can actively adjust the shock absorber's stiffness and damping according to road conditions and driving requirements, achieving a more personalized driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a traditional shock absorber;

[0014] Figure 2 This is a schematic diagram of the linear motor vibration absorber disclosed in the utility model;

[0015] Figure 3 This is a schematic diagram of the linear motor portion of the linear motor vibration damper disclosed in the utility model.

[0016] In the figure, the upper connecting structure 1, the spring 2, the oil storage cylinder 3, the motor housing 4, the working cylinder 5, the motor coil 6, the permanent magnet 7, the piston rod 8, the tray 9, the adjustable built-in valve 10, the compression valve 11, the valve coil 12, and the connecting hole 13. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] In this specification, unless otherwise specified, the terms "vertical", "upper", "lower", "top", "bottom", "inner" and "outer" indicate directions or positional relationships based on the attached Figure 2 The orientation or positional relationship shown is only for the convenience of describing the present invention, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0019] Conventional shock absorbers such as Figure 1 As shown, the shock absorber comprises an upper connecting structure 1, a spring 2, an oil reservoir 3, a working cylinder 5, and a piston rod 8. The bottom end of the working cylinder 5 is connected to a compression valve 11. The working cylinder 5 and the compression valve 11 are located within the oil reservoir 3. A piston is located within the working cylinder 5, forming a sliding pair with the working cylinder 5 along its axial direction. The piston rod 8 is connected to the upper connecting structure 1 at its top end and inserted into the working cylinder 5 at its bottom end, connecting to the piston. The spring 2 is arranged to extend vertically and connect between the upper connecting structure 1 and the oil reservoir 3. The upper connecting structure 1 is mounted to the vehicle body, and the bottom end of the oil reservoir 3 is mounted to the wheel frame. During vehicle motion, the oil reservoir 3 moves up and down, generating relative motion with the piston rod 8, generating a corresponding damping force in the internal stroke oil circuit, and driving the spring 2 to move up and down. However, this results in a limited range of shock absorber performance adjustment, making it difficult to adapt to complex and changing driving conditions.

[0020] The linear motor vibration damper disclosed in the utility model is as follows Figure 2 As shown in the figure, the following improvements are made on the basis of the traditional shock absorber: Figure 3 As shown, a permanent magnet 7 is connected to the outer wall of the oil reservoir 3. A motor housing 4 is mounted on the outer periphery of the oil reservoir 3, and a motor coil 6 is provided on the inner wall of the motor housing 4. The motor housing 4 is vertically movable with the oil reservoir 3. The top end of the motor housing 4 is fixed to the upper connecting structure 1.

[0021] Through the motor housing 4 and motor coil 6, when the motor coil 6 is energized, the relative motion between the motor coil 6 and the permanent magnet 7 regulates the magnetic flux, thereby controlling the magnitude and direction of the generated force. The direction of the force can be opposite to or the same as the damping force, effectively reducing vehicle vibration and bumps. This active vibration reduction capability improves ride comfort and helps protect the vehicle structure from damage.

[0022] In traditional shock absorbers, the piston that reciprocates within the working cylinder 5 is a conventional piston, which cannot adjust the flow rate of the oil through the piston. In the present utility model, the piston is an adjustable internal valve 10. By replacing the traditional piston with an adjustable internal valve 10, the opening of the adjustable internal valve 10 is controlled by adjusting the current in the adjustable internal valve 10, thereby adjusting the rate of oil flow through the valve, thereby achieving the purpose of changing the damping force of the shock absorber, allowing the vehicle to more effectively absorb and mitigate impact and vibration from the road during driving.

[0023] The piston rod 8 is hollow, and the valve coil 12 of the adjustable internal valve 10 passes through the hollow interior of the piston rod 8 and exits through the top opening of the piston rod 8. The valve coil 12 of the adjustable internal valve 10 is connected to an electronic controller. The electronic controller adjusts the current in real time to control the opening of the adjustable internal valve 10, thereby adjusting the damping force in real time to adapt to different driving conditions and road conditions. This precise control based on actual conditions results in a more ideal vibration reduction effect.

[0024] The motor coil 6 is connected to an electronic controller, and its operation is controlled by the electronic controller.

[0025] The linear motor shock absorber disclosed in the present utility model adopts electric technology to improve the response speed. The linear motor composed of the motor coil 6 and the permanent magnet 7 can directly convert electrical energy into mechanical energy without the need to set up a hydraulic or pneumatic system, etc., which can greatly shorten the response time, so that the shock absorber can quickly sense the vibration and bumps of the vehicle and respond immediately. The shock absorber has a very fast response speed and can control the motion state of the load in an instant, thereby achieving a better vibration reduction effect. This fast response capability helps to reduce the bumps and shakes of the vehicle during driving and improve ride comfort. In addition, the linear motor also has the characteristics of high precision and high stability, and can maintain stable performance in various complex environments.

[0026] The linear motor shock absorber disclosed in the present utility model can actively adjust the stiffness and damping of the shock absorber. The specific adjustment method is as follows: when the vehicle is traveling on an uneven road, the road surface condition and driving conditions are detected by sensors, and the data is transmitted to the electronic controller. After receiving the data, the electronic controller analyzes the current road surface condition and the vehicle's motion state, and based on the analysis structure, issues instructions to accurately control the current intensity of the input motor coil 6. The change in current intensity will change the damping force and vibration reduction force generated by the linear motor. The linear motor will generate a reaction force completely opposite to the direction of movement of the shock absorber according to the instructions of the electronic controller, thereby offsetting or slowing down the impact and vibration caused by the road surface. It can also generate a force in the same direction as the direction of movement of the shock absorber to assist or enhance the movement of the shock absorber. This process is continuous and fast. The electronic controller can make multiple adjustments within one second to ensure that the resistance and vibration reduction force of the shock absorber are always adapted to the current road conditions and vehicle load conditions.

[0027] The vehicle's driving state is determined based on data from sensors such as the vehicle's body acceleration sensor, wheel acceleration sensor, and lateral acceleration sensor. The electronic controller performs calculations and then issues corresponding instructions to the adjustable built-in valve 10 on the shock absorber to control the opening of the adjustable built-in valve 10 to provide damping that adapts to the current state.

[0028] If the spring 2 is disposed in the area surrounded by the inner wall of the motor housing 4 and the outer wall of the oil reservoir 3 , the spring 2 will interfere with the motor coil 6 and the permanent magnet 7 . In this embodiment, the spring 2 is disposed on the outer periphery of the motor housing 4 .

[0029] In order to facilitate the assembly of the spring 2 into the oil reservoir 3 and to enable the spring 2 to expand and contract when the oil reservoir 3 moves, a tray 9 is preferably fixed to the outer wall of the oil reservoir 3. The top end of the spring 2 is connected to the upper connecting structure 1, and the bottom end is connected to the tray 9. The tray 9 is located below the motor housing 4. When the spring 2 is in its natural state, the distance between the bottom end of the motor housing 4 and the top surface of the tray 9 is greater than the compression amount of the spring 2 when it is in its ultimate compression state, so as to prevent the tray 9 from colliding with the oil reservoir 3 when the spring 2 is compressed.

[0030] In order to facilitate the installation of the piston rod 8 , a vertically penetrating connecting hole 13 is provided at the center of the upper connecting structure 1 , and the top end of the piston rod 8 is inserted into the connecting hole 13 .

[0031] In the description of this specification, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood by those skilled in the art in specific circumstances.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear motor shock absorber, comprising an upper connecting structure (1), a spring (2), an oil storage barrel (3), a working cylinder (5) and a piston rod (8), wherein the bottom end of the working cylinder (5) is connected to a compression valve (11), the working cylinder (5) and the compression valve (11) are arranged in the oil storage barrel (3), and a piston is arranged in the working cylinder (5), and the piston forms a sliding pair with the working cylinder (5) along the axial direction of the working cylinder (5), the top end of the piston rod (8) is connected to the upper connecting structure (1), and the bottom end is inserted into the working cylinder (5) and connected to the piston; the spring (2) is arranged to be telescopic in the vertical direction and connected between the upper connecting structure (1) and the oil storage barrel (3); and the characteristics are: A permanent magnet (7) is connected to the outer wall of the oil storage cylinder (3); a motor housing (4) is sleeved on the outer periphery of the oil storage cylinder (3); a motor coil (6) is provided on the inner wall of the motor housing (4); and the motor housing (4) is movably matched with the oil storage cylinder (3) in the vertical direction.

2. The linear motor vibration absorber according to claim 1, wherein: The top end of the motor housing (4) is fixed to the upper connecting structure (1).

3. The linear motor vibration absorber according to claim 1, wherein: The piston is an adjustable built-in valve (10).

4. The linear motor vibration absorber according to claim 3, wherein: The piston rod (8) is a hollow rod, and the valve coil (12) of the adjustable built-in valve (10) passes through the hollow inner cavity of the piston rod (8) and is led out from the top opening of the piston rod (8).

5. The linear motor vibration absorber according to any one of claims 1 to 4, characterized in that: The spring (2) is arranged on the outer periphery of the motor housing (4).

6. The linear motor vibration absorber according to claim 5, characterized in that: A tray (9) is fixed on the outer wall of the oil storage cylinder (3); the top end of the spring (2) is connected to the upper connecting structure (1), and the bottom end is connected to the tray (9).

7. The linear motor vibration absorber according to any one of claims 1 to 4, characterized in that: A vertically penetrating connecting hole (13) is provided at the center of the upper connecting structure (1), and the top end of the piston rod (8) is inserted into the connecting hole (13).

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