Linear motor shock absorber

Abstract

The invention discloses a linear motor shock absorber, belongs to the field of vehicle shock absorbers, and aims at improving the shock absorption performance adjusting capacity. 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. According to the novel linear motor shock absorber, the linear motor is integrated on a traditional shock absorber, the brand-new linear motor shock absorber is formed, 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 invention 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 automobile industry, the improvement of vehicle performance is no longer limited to power and fuel economy. Comfort, safety and intelligence have also become important indicators for measuring the quality of modern cars. Among them, shock absorbers, as key components connecting the vehicle body and wheels, play a vital role in the vehicle's driving smoothness, handling stability and ride comfort.

[0003] Conventional shock absorbers such as Figure 1 As shown, it includes an upper connecting structure 1, a spring 2, an oil storage cylinder 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 arranged in the oil storage cylinder 3, and a piston is arranged in the working cylinder 5. 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 along the vertical telescopic direction and connected between the upper connecting structure 1 and the oil storage cylinder 3. The upper connecting structure 1 is installed to the body of the vehicle, and the bottom end of the oil storage cylinder 3 is installed on the frame. During the movement of the vehicle, the oil storage cylinder 3 moves up and down, generates relative movement with the piston rod 8, generates corresponding damping force value in the internal stroke oil circuit, and drives the spring 2 to move up and down. However, the performance adjustment range of such a shock absorber is limited, and it is difficult to adapt to complex and changeable driving conditions. Summary of the invention

[0004] The object of the present invention is to provide a linear motor damper with improved 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 in 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 in 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: the present invention, by integrating a linear motor on a traditional shock absorber, forms a new linear motor shock absorber, which is beneficial to improving driving stability and comfort, and the linear motor shock absorber can realize precise control of the vehicle suspension system. Through the electronic controller, the response of the shock absorber can be adjusted in real time, thereby providing better vehicle body stability and comfort. This precise control enables the vehicle to more effectively absorb and alleviate the impact and vibration from the road surface during driving, especially on bumpy roads, which can significantly reduce the vibration and bumpiness of the vehicle and improve the riding experience; fast response and precise control, the linear motor electromagnetic suspension has a very fast response speed, and can adjust the state of the shock absorber within milliseconds. This rapid response capability enables the vehicle to respond to uneven road surfaces and emergencies in a timely manner, thereby improving the vehicle's handling and safety. In addition, the linear motor shock absorber can also actively adjust the stiffness and damping of the shock absorber according to road conditions and driving requirements to achieve 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 It is a schematic diagram of the linear motor vibration absorber disclosed in the present invention;

[0015] Figure 3 It is a schematic diagram of the linear motor part of the linear motor vibration damper disclosed in the present invention.

[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 is further described below in conjunction with 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 cannot be understood as limiting the present invention.

[0019] Conventional shock absorbers such as Figure 1 As shown, it includes an upper connecting structure 1, a spring 2, an oil storage cylinder 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 arranged in the oil storage cylinder 3, and a piston is arranged in the working cylinder 5. 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 telescopically arranged along the vertical direction and connected between the upper connecting structure 1 and the oil storage cylinder 3. The upper connecting structure 1 is installed on the body of the vehicle, and the bottom end of the oil storage cylinder 3 is installed on the frame of the wheel. During the movement of the vehicle, the oil storage cylinder 3 moves up and down, generates relative movement with the piston rod 8, generates corresponding damping force value in the internal stroke oil circuit, and drives the spring 2 to move up and down. However, the performance adjustment range of the shock absorber is limited, and it is difficult to adapt to complex and changeable driving conditions.

[0020] The linear motor vibration damper disclosed in the present invention 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 storage cylinder 3; a motor housing 4 is sleeved on the outer periphery of the oil storage cylinder 3, and a motor coil 6 is arranged on the inner wall of the motor housing 4; the motor housing 4 is movably matched with the oil storage cylinder 3 in the vertical direction. The top end of the motor housing 4 is fixed to the upper connection structure 1.

[0021] Through the motor structure arrangement of the motor housing 4 and the motor coil 6, when the motor coil 6 is energized, the magnitude and direction of the generated force are controlled by adjusting the magnetic flux through the relative movement between the motor coil 6 and the permanent magnet 7. The direction of the force is opposite to the direction of the damping force, or it can be the same, thereby effectively reducing the vibration and bump of the vehicle. This active vibration reduction capability improves the ride comfort and helps protect the vehicle structure from damage.

[0022] In a conventional shock absorber, the piston that reciprocates in the working cylinder 5 is a conventional piston, which cannot adjust the flow rate of the oil flowing through the piston. In the present invention, the piston is an adjustable built-in valve 10. The conventional piston is replaced with an adjustable built-in valve 10, and the opening of the adjustable built-in valve 10 is controlled by adjusting the current of the adjustable built-in valve 10, thereby adjusting the rate at which the oil flows through the valve, thereby achieving the purpose of changing the damping force of the shock absorber, so that the vehicle can more effectively absorb and alleviate the impact and vibration from the road during driving.

[0023] 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. The valve coil 12 of the adjustable built-in valve 10 is connected to an electronic controller, and the electronic controller adjusts the current in real time to control the opening of the adjustable built-in valve 10, thereby adjusting the damping force in real time to adapt to different driving conditions and road conditions. This method of precise control according to actual conditions makes the vibration reduction effect more ideal.

[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 invention adopts electric technology and can 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 setting 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 rapid response capability helps to reduce the bumps and shakes of the vehicle during driving and improve the 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 invention 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 issues instructions to accurately control the current intensity of the input motor coil 6 based on the analysis structure. 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, and can also generate a force in the same direction as the shock absorber's motion to assist or enhance the movement of the shock absorber. This process is continuous and fast, and 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 judged based on data from sensors such as the vehicle's body acceleration sensor, wheel acceleration sensor, and lateral acceleration sensor, and the electronic controller performs calculations. The electronic controller 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 storage cylinder 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 to the oil storage cylinder 3, so that the movement of the oil storage cylinder 3 can drive the spring 2 to expand and contract, preferably, a tray 9 is fixed to the outer wall of the oil storage cylinder 3, and the top end of the spring 2 is connected to the upper connection structure 1, and the bottom end is connected to the tray 9. The tray 9 is located below the motor housing 4, and the spring 2 is in a 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 when the spring 2 is in an extreme compression state, so as to avoid the tray 9 colliding with the oil storage cylinder 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 clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 cylinder (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 cylinder (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 cylinder (3); 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), and a motor coil (6) is arranged on the inner wall of the motor housing (4); the motor housing (4) is movably matched with the oil storage cylinder (3) in the vertical direction.

2. The linear motor damper according to claim 1, characterized in that: The top end of the motor housing (4) is fixed to the upper connecting structure (1).

3. The linear motor damper according to claim 1, characterized in that: The piston is an adjustable built-in valve (10).

4. The linear motor damper according to claim 3, characterized in that: 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 connection 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 connection hole (13) is provided at the center position of the upper connection structure (1), and the top end of the piston rod (8) is inserted into the connection hole (13).

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