Outer cylinder and sliding column type magneto-rheological damper

Abstract

The utility model discloses a kind of outer cylinder and sliding column type magneto-rheological shock absorber, it is related to shock absorber technical field, including outer cylinder and damper, outer cylinder is sleeved in the outside of damper, outer cylinder inside is provided with the guide component for supporting guide damper;Damper includes damping working cylinder, floating piston, piston rod and guider, damping working cylinder first end is set in the guide of outer cylinder, the second end of damping working cylinder is closed structure and protrudes in the outside of the second end of outer cylinder;Outer cylinder and sliding column type magneto-rheological shock absorber in the utility model, adopt inner and outer cylinder sleeve structure, inner cylinder is damping working cylinder, it can reciprocate in outer cylinder inside, can be used for macpherson suspension, resist stronger lateral force;Outer cylinder outer wall can be welded some structural members according to need, deformation caused by outer cylinder outer wall welding does not affect the work of internal damper.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, and in particular to an outer cylinder and sliding column type magnetorheological vibration damper. Background Technology

[0002] MacPherson strut vibration dampers withstand relatively large lateral forces. While conventional hydraulic dampers typically have very thick piston rods, magnetorheological dampers, usually high-pressure monotube dampers, generally have thinner piston rods to reduce gas rebound force. Furthermore, due to their unique structure, MacPherson strut dampers have spring discs, stabilizer bar supports, hose supports, and steering knuckle mounts welded to the outer wall of the cylinder. However, magnetorheological dampers require smooth inner walls and have very high requirements for coaxiality, roundness, and straightness, allowing no deformation of the damping cylinder.

[0003] In summary, providing a magnetorheological damper that can guarantee large lateral forces and prevent cylinder deformation due to welding, and thus be applicable to MacPherson strut suspension, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an outer cylinder and a sliding column type magnetorheological damper to solve the problems existing in the prior art. It can be used in MacPherson strut suspension to resist strong lateral forces. Some structural components can be welded to the outer wall of the outer cylinder as needed. The deformation caused by welding of the outer wall of the outer cylinder does not affect the operation of the internal damper.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides an outer cylinder and a sliding column type magnetorheological vibration damper, including an outer cylinder and a damper. The outer cylinder is sleeved outside the damper, and a guide assembly for supporting and guiding the damper is provided inside the outer cylinder. The damper includes a damping working cylinder, a floating piston, a piston rod, and a guide. The first end of the damping working cylinder extends into the outer cylinder and is equipped with the guide. The second end of the damping working cylinder is a closed structure and extends outside the second end of the outer cylinder. One end of the piston rod is connected to the damping piston located inside the damping working cylinder, and the other end of the piston rod passes through the guide, extends outside the damping working cylinder, and is connected to the bottom cover of the outer cylinder provided at the first end of the outer cylinder. The floating piston is disposed between the second end of the damping working cylinder and the damping piston, dividing the damping working cylinder into a gas chamber and a liquid chamber.

[0006] In some embodiments, the guide assembly includes a first guide bushing skeleton, a first guide bushing, a support tube, a second guide bushing skeleton, and a second guide bushing. A limiting step is provided at a position near the second end inside the outer cylinder. The first guide bushing skeleton, the support tube, and the second guide bushing skeleton are sequentially arranged from the limiting step toward the second end inside the outer cylinder. The first guide bushing is installed on the inner ring of the first guide bushing skeleton, and the second guide bushing is installed on the inner ring of the second guide bushing skeleton. The inner diameter of the support tube is larger than the inner diameters of the first guide bushing and the second guide bushing. The outer wall of the damping working cylinder is slidably connected to the first guide bushing and the second guide bushing, and forms a lubrication cavity capable of injecting lubricating oil between it and the support tube.

[0007] In some embodiments, the first guide bushing skeleton, the support tube, and the second guide bushing skeleton are integrally formed.

[0008] In some embodiments, the first guide bushing skeleton is interference-fitted with the first guide bushing, and the second guide bushing skeleton is interference-fitted with the second guide bushing.

[0009] In some embodiments, a first sealing ring is provided between the limiting step and the first guide bushing skeleton and the first guide bushing.

[0010] In some embodiments, a second sealing ring is provided on the outer side of the second guide bushing skeleton and the second guide bushing, and a retaining ring for limiting the second sealing ring is provided inside the second end of the outer cylinder.

[0011] In some embodiments, the second end of the outer cylinder is also connected to an outer cylinder end cap by interference fit or threaded connection, and a dust seal is provided in the end annular groove of the outer cylinder end cap.

[0012] In some embodiments, a number of seals are provided between the guide and the piston rod and the damping working cylinder.

[0013] In some embodiments, a seal is provided between the outer wall of the floating piston and the damping working cylinder.

[0014] In some embodiments, the piston rod is a hollow structure used to lead out the coil wires of the damping piston.

[0015] In some embodiments, the piston rod is bolted to the outer cylinder bottom cover, and a buffer block is fitted onto one end of the piston rod near the outer cylinder bottom cover.

[0016] The present invention achieves the following technical advantages over the prior art: The outer cylinder and sliding column magnetorheological damper of this utility model adopt an inner and outer cylinder sleeve structure. The inner cylinder, which is also the damping working cylinder, can reciprocate inside the outer cylinder and can be used in MacPherson strut suspension. The damping working cylinder is slidably connected inside the outer cylinder. The damping working cylinder tube, made of the same cross-sectional area material, can withstand lateral forces better than the rod, protecting the piston rod inside the damping working cylinder from lateral forces. The piston will not be subjected to load friction on the inner wall of the damping working cylinder, thus resisting stronger lateral forces. Some structural components can be welded to the outer wall of the outer cylinder as needed. The deformation caused by welding of the outer wall of the outer cylinder does not affect the operation of the internal damper.

[0017] Furthermore, the inner wall of the outer cylinder has a guiding and sealing structure, which can ensure the reciprocating motion of the inner cylinder while lubricating its movement and reducing the friction of the shock absorber.

[0018] Furthermore, spring discs, hose supports, stabilizer bar supports, and steering knuckle mounting brackets can be welded to the outer wall of the outer cylinder. Deformation caused by welding the outer wall of the outer cylinder will not affect the inner cylinder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the outer cylinder and the sliding column magnetorheological vibration damper in this utility model; Figure 2 This is a schematic diagram of the structure of the outer cylinder in this utility model; Figure 3 This is a schematic diagram of the guide component in this utility model; In the diagram: 1. Outer cylinder; 10. First guide bushing frame; 11. First guide bushing; 12. Support tube; 13. Second guide bushing frame; 14. Second guide bushing; 15. Retaining ring; 16. First sealing ring; 17. Second sealing ring; 18. Outer cylinder end cap; 19. Outer cylinder bottom cap; 20. Dust seal; 2. Damper; 21. Damping working cylinder; 22. Floating piston; 23. Piston rod; 24. Guide; 25. Damping piston; 26. Air chamber; 27. Liquid chamber; 28. Buffer block; 3. Lubrication chamber; 4. Mounting bracket; 5. Spring tray; 6. Anti-tilt bar connecting bracket; 7. Wiring harness bracket. Detailed Implementation

[0021] 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.

[0022] The purpose of this invention is to provide an outer cylinder and a sliding column type magnetorheological damper to solve the problems existing in the prior art.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In this embodiment, the outer cylinder 1 and the sliding column magnetorheological damper, such as Figures 1-3 As shown, it includes an outer cylinder 1 and a damper 2. The outer cylinder 1 is sleeved on the outside of the damper 2, and a guide assembly for supporting the guide damper 2 is provided inside the outer cylinder 1. The damper 2 includes a damping working cylinder 21, a floating piston 22, a piston rod 23, and a guide 24. The first end of the damping working cylinder 21 extends into the outer cylinder 1 and is equipped with the guide 24. The second end of the damping working cylinder 21 is a closed structure and extends out of the second end of the outer cylinder 1. One end of the piston rod 23 is connected to the damping piston 25 located inside the damping working cylinder 21, and the other end of the piston rod 23 passes through the guide 24 and extends out of the damping working cylinder 21 and is connected to the outer cylinder bottom cover 19 provided at the first end of the outer cylinder 1. The floating piston 22 is located between the second end of the damping working cylinder 21 and the damping piston 25, dividing the damping working cylinder 21 into two parts: a gas chamber 26 and a liquid chamber 27. The gas chamber 26 is usually filled with high-pressure nitrogen, and the liquid chamber 27 is injected with magnetorheological fluid.

[0025] In some embodiments, the guide assembly includes a first guide bushing frame 10, a first guide bushing 11, a support tube 12, a second guide bushing frame 13, and a second guide bushing 14. A limiting step (not shown in the figure) is provided at a position near the second end inside the outer cylinder 1. The first guide bushing frame 10, the support tube 12, and the second guide bushing frame 13 are arranged sequentially from the limiting step toward the second end inside the outer cylinder 1. The first guide bushing 11 is installed on the inner ring of the first guide bushing frame 10, and the second guide bushing 14 is installed on the inner ring of the second guide bushing frame 13. The inner diameter of the support tube 12 is larger than the inner diameters of the first guide bushing 11 and the second guide bushing 14. The outer wall of the damping working cylinder 21 is slidably connected to the first guide bushing 11 and the second guide bushing 14, and forms a lubrication cavity 3 between it and the support tube 12, which can be filled with lubricating oil. The damper 2 is installed inside the outer cylinder 1. A small chamber is formed between the damping working cylinder 21 and the support tube 12, which is the lubrication chamber. A small amount of lubricating oil is injected to lubricate the guide bushing and seals during the operation of the shock absorber, thereby reducing friction.

[0026] In some embodiments, the first guide bushing skeleton 10, the support tube 12, and the second guide bushing skeleton 13 are integrally formed structures.

[0027] In some embodiments, the first guide bushing skeleton 10 and the first guide bushing 11, and the second guide bushing skeleton 13 and the second guide bushing 14 are all connected by an interference fit. That is, the guide bushing is pressed into the guide bushing skeleton by an interference fit.

[0028] In some embodiments, in order to ensure the sealing of the connection between the damping working cylinder 21 and the outer cylinder 1, a retaining ring 15 and a first sealing ring 16 are provided between the limiting step and the first guide bushing skeleton 10 and the first guide bushing 11. A second sealing ring 17 is provided on the outside of the second guide bushing skeleton 13 and the second guide bushing 14. A retaining ring with the limiting second sealing ring 17 is provided inside the second end of the outer cylinder 1. The second end of the outer cylinder 1 is also fitted with an outer cylinder end cap 18 by interference fit or threaded connection. That is, the outer cylinder end cap 18 is pressed into the second end of the outer cylinder 1 by interference fit or by threaded connection. A dust seal 20 is provided in the end annular groove of the outer cylinder end cap 18.

[0029] In some embodiments, a plurality of seals are provided between the guide 24 and the piston rod 23 and the damping working cylinder 21, and a seal is provided between the outer wall of the floating piston 22 and the damping working cylinder 21.

[0030] In some embodiments, the piston rod 23 is a hollow structure used to lead out the coil wires of the damping piston 25.

[0031] In some embodiments, the piston rod 23 is bolted to the outer cylinder bottom cover 19, and a buffer block 28 is fitted onto one end of the piston rod 23 near the outer cylinder bottom cover 19. The buffer block 28 can be optionally installed as needed.

[0032] It should be noted that the damping piston 25 in this utility model is a common magnetorheological damper damping piston 25, and its structural principle will not be described in detail.

[0033] During installation, after the damper 2 is installed into the outer cylinder 1, the bottom cover of the outer cylinder 1 is threaded or welded to the lower end of the outer cylinder 1, and the piston rod 23 of the damper 2 is fastened to the bottom cover 19 of the outer cylinder 1 with bolts. Mounting brackets 4, spring trays 5, anti-roll bar connecting brackets 6, wiring harness brackets 7, etc., can be welded to the outer surface of the outer cylinder as needed.

[0034] When the shock absorber is working, the damping working cylinder 21 slides relative to the outer cylinder 1, while the damping piston 25 and piston rod 23 remain stationary relative to the outer cylinder 1. The magnetorheological fluid on both sides of the damping piston 25 in the liquid chamber 27 is forced to flow through the damping piston 25 under pressure, forming a damping force. The damping force can be controlled by applying a certain current through a wire.

[0035] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An outer cylinder and sliding column type magnetorheological vibration damper, characterized in that: It includes an outer cylinder and a damper, wherein the outer cylinder is sleeved on the outside of the damper, and a guide assembly for supporting and guiding the damper is provided inside the outer cylinder; The damper includes a damping working cylinder, a floating piston, a piston rod, and a guide. The first end of the damping working cylinder extends into the outer cylinder and is equipped with the guide. The second end of the damping working cylinder is a closed structure and extends outside the second end of the outer cylinder. One end of the piston rod is connected to the damping piston located inside the damping working cylinder, and the other end of the piston rod passes through the guide, extends outside the damping working cylinder, and is connected to the bottom cover of the outer cylinder provided at the first end of the outer cylinder. The floating piston is disposed between the second end of the damping working cylinder and the damping piston, dividing the damping working cylinder into a gas chamber and a liquid chamber.

2. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 1, characterized in that: The guiding assembly includes a first guide bushing skeleton, a first guide bushing, a support tube, a second guide bushing skeleton, and a second guide bushing. A limiting step is provided at the second end of the outer cylinder. The first guide bushing skeleton, the support tube, and the second guide bushing skeleton are arranged sequentially from the limiting step toward the second end of the outer cylinder. The first guide bushing is installed on the inner ring of the first guide bushing skeleton, and the second guide bushing is installed on the inner ring of the second guide bushing skeleton. The inner diameter of the support tube is larger than the inner diameters of the first guide bushing and the second guide bushing. The outer wall of the damping working cylinder is slidably connected to the first guide bushing and the second guide bushing, and forms a lubrication cavity with the support tube that can be injected with lubricating oil.

3. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 2, characterized in that: The first guide bushing skeleton, the support tube, and the second guide bushing skeleton are integrally formed.

4. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 2, characterized in that: The first guide bushing skeleton and the first guide bushing, and the second guide bushing skeleton and the second guide bushing are all connected by an interference fit.

5. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 2, characterized in that: A first sealing ring is provided between the limiting step and the first guide bushing frame and the first guide bushing.

6. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 2, characterized in that: The second guide bushing skeleton and the outer side of the second guide bushing are provided with a second sealing ring, and the second end of the outer cylinder is provided with a retaining ring to limit the second sealing ring.

7. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 6, characterized in that: The second end of the outer cylinder is also connected to an outer cylinder end cap by interference fit or threaded connection, and a dust seal is provided in the end annular groove of the outer cylinder end cap.

8. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 1, characterized in that: Several seals are provided between the guide and the piston rod and the damping working cylinder; a seal is provided between the outer wall of the floating piston and the damping working cylinder.

9. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 1, characterized in that: The piston rod is a hollow structure used to lead out the coil wire of the damping piston.

10. The outer cylinder and sliding column type magnetorheological vibration damper according to claim 1, characterized in that: The piston rod is bolted to the bottom cover of the outer cylinder, and a buffer block is fitted on the end of the piston rod near the bottom cover of the outer cylinder.

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