A damping-actively adjustable shock absorber

Abstract

This utility model discloses a damping-actively adjustable vibration damper, belonging to the technical field of vibration damper technology. The damping-actively adjustable vibration damper includes an oil tank, inside which is a working cylinder. An oil storage chamber is separated from the oil tank by the working cylinder. A piston rod is installed inside the working cylinder, and a reset valve assembly is bolted to the bottom end of the piston rod. A bottom cover is welded to the bottom of the oil tank, and a compression valve assembly is installed on the upper part of the bottom cover. The compression valve assembly and the working cylinder form a working chamber, which is filled with magnetorheological fluid. When the excitation coil malfunctions, only the coil protective cover needs to be opened to remove the excitation coil for repair or replacement, without disassembling the internal structure of the vibration damper. This greatly reduces the difficulty of maintenance and upkeep of the magnetorheological vibration damper, making it convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of vibration damper technology, specifically relating to a vibration damper with active damping adjustment. Background Technology

[0002] Magnetorheological dampers are vibration dampers made using the properties of magnetorheological fluids. They can adjust the damping performance of the fluid by applying and changing a magnetic field, thereby regulating the damping force and providing superior and precise vibration control. Traditional magnetorheological dampers involve injecting magnetorheological fluid into the working chamber and installing an excitation coil on the piston rod. The damping performance is adjusted by flowing current through the excitation coil. However, existing magnetorheological dampers have the following problems: First, the excitation coil is built into the piston rod; once the excitation coil... Firstly, if the excitation coil malfunctions, the shock absorber needs to be disassembled for repair. Secondly, when current is applied to the excitation coil, it will inevitably heat up due to resistance. Similarly, the piston rod of the shock absorber will also heat up due to friction during damping. This puts the excitation coil in a high-temperature working environment, which accelerates the aging of the excitation coil and makes it more prone to failure. Finally, in order to reserve the power circuit for the excitation coil inside the piston rod, the piston connecting rod is generally designed with a hollow structure so that the power line can be connected to the excitation coil. This also increases the risk of piston rod wear and oil leakage.

[0003] To address this issue, we designed a damper with active damping adjustment to provide an alternative technical solution. Utility Model Content

[0004] The purpose of this invention is to provide a damping-actively adjustable shock absorber to solve the problems mentioned in the background art regarding the use of existing shock absorbers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a damping active adjustment shock absorber, comprising an oil tank, a working cylinder disposed inside the oil tank, an oil storage chamber separated from the working cylinder, a piston rod disposed inside the working cylinder, a restoring valve assembly bolted to the bottom end of the piston rod, a bottom cover welded to the bottom of the oil tank, a compression valve assembly mounted on the upper part of the bottom cover, the compression valve assembly and the working cylinder forming a working chamber, and a magnetorheological fluid injected into the working chamber;

[0006] An oil drum groove is formed on the outside of the oil drum. An excitation coil is wound and installed inside the oil drum groove. An upper bracket and a lower bracket are respectively installed at the upper and lower ends of the oil drum groove, and a coil protective cover is installed through the upper and lower brackets.

[0007] Preferably, a dust cover is provided on the outside of the connection between the piston rod and the oil drum, and a dust cover is provided on the upper end of the dust cover.

[0008] Preferably, the length of the groove in the oil drum is based on the maximum tensile state and minimum compressive state of the shock absorber.

[0009] Preferably, the upper bracket is welded and fixed to the outside of the oil drum, and the lower bracket is fixed to the outside of the oil drum by threads. The lower bracket has a small hole for connecting to a power line.

[0010] Preferably, a limit block is provided at the connection position between the piston rod and the working cylinder.

[0011] Preferably, an upper lifting lug assembly is welded to the top of the piston rod, and a lower lifting lug assembly is welded to the bottom of the bottom cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] When the excitation coil of this design fails, it can be removed for repair or replacement simply by opening the coil protective cover, without disassembling the internal structure of the vibration damper. This greatly reduces the difficulty of maintenance and upkeep of the magnetorheological vibration damper, making it convenient to use. The excitation coil is not located inside the piston rod but is placed in the groove of the oil tank. The excitation coil can dissipate heat quickly through the coil protective cover and the oil tank, thereby ensuring the operating temperature of the excitation coil and reducing the aging of the excitation coil. Since the excitation coil does not need to be located inside the piston rod, the piston rod does not need to adopt a hollow structure, which also improves the strength of the piston rod and reduces the oil leakage problem caused by piston rod damage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention in a stretched state;

[0015] Figure 2 This is a schematic diagram of the compressed structure of this utility model.

[0016] In the diagram: 1. Upper lifting lug assembly; 2. Dust cover; 3. Dust cap; 4. Piston rod; 5. Oil drum; 6. Oil reservoir; 7. Working cylinder; 8. Reset valve assembly; 9. Upper bracket; 10. Coil protection cover; 11. Oil drum recess; 12. Lower support; 13. Compression valve assembly; 14. Bottom cover; 15. Lower lifting lug assembly; 16. Limit block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1-2 A damping-actively adjustable shock absorber includes an oil tank 5, a working cylinder 7 inside the oil tank 5, an oil storage chamber 6 separated from the working cylinder 7 and the oil tank 5, a piston rod 4 inside the working cylinder 7, a recovery valve assembly 8 connected to the bottom end of the piston rod 4 by bolts, a bottom cover 14 welded to the bottom of the oil tank 5, a compression valve assembly 13 installed on the top of the bottom cover 14, the compression valve assembly 13 and the working cylinder 7 form a working chamber, and magnetorheological fluid is injected into the working chamber;

[0019] An oil drum groove 11 is formed on the outside of the oil drum 5. An excitation coil is wound and installed inside the oil drum groove 11. An upper bracket 9 and a lower bracket are respectively installed at the upper and lower ends of the oil drum groove 11, and a coil protective cover 10 is installed through the upper and lower brackets.

[0020] This solution proposes a magnetorheological vibration damper with an externally mounted excitation coil. The excitation coil of the damper is installed inside the oil drum groove 11 outside the oil drum 5, and the coil protective cover 10 provides a good working environment for the internal excitation coil. Since the excitation coil is not located inside the piston rod 4, when the excitation coil fails, it can be removed for repair or replacement simply by opening the coil protective cover, without disassembling the internal structure of the damper. This greatly reduces the difficulty of maintenance and upkeep of the magnetorheological vibration damper and makes it convenient to use. Because the excitation coil is not located inside the piston rod 4 but in the oil drum groove 11, the excitation coil can dissipate heat quickly through the coil protective cover and the oil drum 5, thereby ensuring the operating temperature of the excitation coil and reducing its aging. Since the excitation coil does not need to be located inside the piston rod 4, the piston rod 4 does not need to be hollow, which also improves the strength of the piston rod 4 and reduces oil leakage problems caused by piston rod 4 damage.

[0021] Furthermore, a dust cover 2 is provided on the outside of the connection between the piston rod 4 and the oil drum 5, and a dust cover 3 is provided on the upper end of the dust cover 2.

[0022] Through this technical solution, the structure of the dust cover 2 and the dust cap 3 is used to isolate and prevent dust, thus preventing dust in the environment from entering the interior of the shock absorber. This reduces the wear of dust on the sealing structure of the shock absorber, helps to ensure the sealing performance of the shock absorber, and reduces the probability of oil leakage of the shock absorber.

[0023] Furthermore, the length of the oil drum groove 11 is based on the maximum tensile state and minimum compressive state of the damper.

[0024] With this technical solution, the length of the groove 11 in the oil drum determines the coverage length of the excitation coil, which directly affects the control effect on the internal magnetorheological fluid.

[0025] Furthermore, the upper bracket 9 is welded and fixed to the outside of the oil drum 5, and the lower bracket is fixed to the outside of the oil drum 5 by threads. The lower bracket has a small hole for connecting the power line.

[0026] The lower bracket is installed by threads, making it easy to open for maintenance and replacement of the excitation coil. The lower bracket has a small hole through which an external power supply is electrically connected to the internal excitation coil, thereby providing the excitation coil with operating current.

[0027] Furthermore, a limit block 16 is provided at the connection position between the piston rod 4 and the working cylinder 7.

[0028] Furthermore, an upper lifting lug assembly 1 is welded to the top of the piston rod 4, and a lower lifting lug assembly 15 is welded to the bottom of the bottom cover 14.

[0029] Working principle: During the stretching stroke, the piston rod 4 moves upward, causing the upper chamber volume to decrease and the pressure to increase, while the lower chamber volume to increase and the pressure to decrease. Part of the liquid flows from the upper chamber to the lower chamber through the channel of the piston's restoring valve system, and another part of the liquid flows from the oil reservoir 6 to the lower chamber through the compression valve system's compensating plate for compensation. During the compression stroke, the piston rod 4 moves downward, causing the upper chamber volume to increase and the pressure to decrease, while the lower chamber volume to decrease and the pressure to increase. Part of the liquid flows from the lower chamber to the upper chamber through the flow valve of the restoring valve system. Since the volume of the piston rod 4 occupies the upper chamber space, the increase in liquid in the upper chamber is less than the decrease in liquid in the lower chamber. The other part of the liquid flows into the oil reservoir 6 through the valve plate on the compression valve system. During the stretching and compression processes, the magnetic field of the excitation coil can be adjusted by energizing or de-energizing the excitation coil, thereby controlling the damping performance of the magnetorheological fluid and adjusting the damping force of the shock absorber.

[0030] In the description of this invention, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In the description of this invention, the terms "one embodiment," "some embodiments," "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 invention. In this invention, 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 a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this invention without contradiction.

[0032] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A damping-actively adjustable shock absorber, characterized in that: The system includes an oil drum (5), inside which is a working cylinder (7), and an oil storage chamber (6) is separated from the oil drum (5). Inside the working cylinder (7) is a piston rod (4), and the bottom end of the piston rod (4) is connected to a recovery valve assembly (8) by bolts. The bottom of the oil drum (5) is welded with a bottom cover (14), and a compression valve assembly (13) is installed on the top of the bottom cover (14). The compression valve assembly (13) and the working cylinder (7) form a working chamber, and magnetorheological fluid is injected into the working chamber. An oil drum groove (11) is formed on the outside of the oil drum (5). An excitation coil is wound and installed in the oil drum groove (11). An upper bracket (9) and a lower bracket are respectively installed at the upper and lower ends of the oil drum groove (11) and a coil protective cover (10) is installed through the upper and lower brackets.

2. The damping-actively adjustable shock absorber according to claim 1, characterized in that: A dust cover (2) is provided on the outside of the connection between the piston rod (4) and the oil drum (5), and a dust cover (3) is provided on the upper end of the dust cover (2).

3. The damping-actively adjustable shock absorber according to claim 1, characterized in that: The length of the groove (11) in the oil drum is based on the maximum tensile state and minimum compression state of the damper.

4. The damping-actively adjustable shock absorber according to claim 1, characterized in that: The upper bracket (9) is welded and fixed to the outside of the oil drum (5), and the lower bracket is fixed to the outside of the oil drum (5) by threads. The lower bracket has a small hole for connecting to the power line.

5. A damping-actively adjustable shock absorber according to claim 1, characterized in that: A limit block (16) is provided at the connection position between the piston rod (4) and the working cylinder (7).

6. The damping-actively adjustable shock absorber according to claim 1, characterized in that: The piston rod (4) is welded to the top with an upper lifting lug assembly (1), and the bottom cover (14) is welded to the bottom with a lower lifting lug assembly (15).

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