Magnetorheological fluid shock absorber

Abstract

The utility model relates to the technical field of magneto-rheological shock absorbers, and discloses a magneto-rheological fluid shock absorber which comprises a shock absorber body arranged in a shock absorption spring in a sleeved mode, a heat dissipation piece is arranged on the outer side of the shock absorber body in a sleeved mode, the heat dissipation piece is located between the shock absorption spring and the shock absorber body, and the heat dissipation piece comprises a lower shell, an organ upper shell and a top shell. According to the magnetorheological fluid shock absorber, the lower shell, the organ upper shell and the top shell are arranged on the outer side of the shock absorber body, when the piston rod moves, the organ upper shell can be compressed and stretched, then in the using process of the shock absorber body, the organ upper shell can be driven to suck air, air obtained after heat exchange is discharged out of the lower shell, heat dissipation of the shock absorber body is achieved, and the service life of the shock absorber body is prolonged. The shock absorber is simple in structure, convenient to operate and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetorheological shock absorbers, in particular to a magnetorheological fluid shock absorber. Background Technique

[0002] A magnetorheological fluid shock absorber is a device that uses the characteristics of magnetorheological fluid to control and regulate the vibration of a mechanical system; the magnetorheological fluid shock absorber includes a piston cylinder, a floating piston, a working piston and a piston rod. The floating piston is movably located in the piston cylinder and divides the piston cylinder into a first cavity and a second cavity. The working piston and the piston rod are movably located in the second cavity along the axis of the piston rod together. The working piston is connected to one end of the piston rod, and a coil is wound around the working piston. When the piston rod returns to its original position, the piston rod moves out of the piston cylinder, the volume of the second cavity for accommodating the magnetorheological fluid becomes larger, and the pressure decreases. In order to ensure that the shock absorber maintains a stable output force, high-pressure gas needs to be filled into the first cavity to make the floating piston move towards the working piston to ensure the stability of the pressure in the second cavity.

[0003] At present, the patent with the publication number CN212004072U discloses a magnetorheological fluid shock absorber, including: a working cylinder filled with magnetorheological fluid, and a coil is sleeved on its outer wall; a moving piston rotatably installed in the working cylinder, the moving piston is fan-shaped, and circumferentially penetrating damping holes are arranged on the moving piston; a fixed piston fixedly installed in the working cylinder, the fixed piston is the same fan shape as the moving piston, and the moving piston and the fixed piston divide the space in the working cylinder into a first space and a second space; a piston rod longitudinally passing through the working cylinder and capable of moving relative to the working cylinder, and the piston rod is clamped between the inner surfaces of the moving piston and the fixed piston; a driving structure is arranged on the surface of the piston rod, and a driven structure capable of being driven by the driving structure is arranged on the inner surface of the moving piston. The magnetorheological fluid shock absorber provided by this device generates damping through the rotation of the moving piston, the volume in the working cylinder remains unchanged, there is no need to set a floating piston, no need to inflate, the structure is compact, and it is convenient for processing and production.

[0004] Although the above device solves the problem of not needing to inflate, there are still the following deficiencies:

[0005] When the magnetorheological fluid flows inside the shock absorber and passes through the piston, friction will be generated by the liquid, especially when the viscosity increases under the influence of the magnetic field, this friction will be converted into heat energy, and the temperature rise will cause the viscosity of the magnetorheological fluid to decrease, which will affect the magnetorheological effect, thereby reducing the damping force and response speed of the shock absorber, and further reducing the damping force of the shock absorber. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a magnetorheological fluid shock absorber, which is convenient for dissipating heat from the shock absorber.

[0007] To achieve the above object, the present utility model provides the following technical solution: A magnetorheological fluid shock absorber, comprising a shock absorber body sleeved inside a shock absorption spring, and a heat dissipation member sleeved outside the shock absorber body. The heat dissipation member is located between the shock absorption spring and the shock absorber body. The heat dissipation member includes a lower shell, an accordion upper shell, and a top shell. The lower shell is sleeved outside the working cylinder of the shock absorber body. The top of the lower shell is fixedly connected to the accordion upper shell. The top shell is fixedly connected to the top of the accordion upper shell and is sleeved outside the piston rod of the shock absorber body. An air inlet system is provided on one side of the top of the top shell, and air outlet systems are provided on both sides of the outer wall of the lower shell. The air outlet systems are connected to the air inlet system through the lower shell, the accordion upper shell, and the top shell.

[0008] Further, an upper fixing ring is threadedly sleeved outside the top shell, and the upper fixing ring is sleeved and threadedly connected to the outside of the piston rod of the shock absorber body. The outer wall of the bottom of the lower shell is threadedly connected to a lower fixing ring, and the lower fixing ring is sleeved and threadedly connected to the outer wall of the working cylinder of the shock absorber body.

[0009] Further, both the air outlet system and the air inlet system are provided with one-way valves.

[0010] Further, heat dissipation fins are fixedly connected to the outer wall of the lower shell.

[0011] Further, an upper sealing ring is sleeved inside the upper fixing ring, and the upper sealing ring abuts against the top surface of the top shell.

[0012] Further, a lower sealing ring is sleeved inside the lower fixing ring, and the lower sealing ring abuts against the bottom surface of the lower shell.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] By providing a lower shell, an accordion upper shell, and a top shell outside the shock absorber body, when the piston rod moves, the accordion upper shell will be compressed and stretched. Thus, during the use of the shock absorber body, it will drive the accordion upper shell to suck air and discharge the heat-exchanged air from the lower shell, realizing the heat dissipation of the shock absorber body, further improving the service life of the shock absorber body. This structure is simple, easy to operate, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0016] Figure 2 is a schematic three-dimensional sectional structure diagram of the whole of the present utility model;

[0017] Figure 3 is a schematic three-dimensional sectional structure diagram of the heat dissipation member of the present utility model;

[0018] Figure 4 is a schematic three-dimensional structure diagram of the heat dissipation member of the present utility model;

[0019] Figure 5 This is a three-dimensional sectional structure schematic diagram of the upper fixing ring and the upper sealing ring of the present utility model;

[0020] Figure 6 This is a three-dimensional sectional structure schematic diagram of the lower fixing ring and the lower sealing ring of the present utility model.

[0021] In the figure: 1. Shock absorber body; 2. Shock absorption spring; 3. Heat dissipation component; 301. Lower shell; 302. Accordion upper shell; 303. Top shell; 4. Heat dissipation fins; 5. Air outlet system; 6. Air inlet system; 7. Upper fixing ring; 71. Upper sealing ring; 8. Lower fixing ring; 81. Lower sealing ring. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] As Figures 1 to 6 shown, a magnetorheological fluid shock absorber includes a shock absorber body 1 sleeved in a shock absorption spring 2. A heat dissipation component 3 is sleeved outside the shock absorber body 1. The heat dissipation component 3 is located between the shock absorption spring 2 and the shock absorber body 1. The heat dissipation component 3 includes a lower shell 301, an accordion upper shell 302 and a top shell 303. The lower shell 301 is sleeved outside the working cylinder of the shock absorber body 1. The top of the lower shell 301 is fixedly connected to the accordion upper shell 302. The top shell 303 is fixedly connected to the top of the accordion upper shell 302, and the top shell 303 is sleeved outside the piston rod of the shock absorber body 1. One side of the top of the top shell 303 is provided with an air inlet system 6. The outer walls on both sides of the lower shell 301 are provided with an air outlet system 5. The air outlet system 5 is connected to the air inlet system 6 through the lower shell 301, the accordion upper shell 302 and the top shell 303.

[0024] As Figure 1 shown, the magnetorheological fluid shock absorber in the present utility model is similar in structure to the existing magnetorheological fluid shock absorber. The patent with the publication number of CN212004072U discloses a magnetorheological fluid shock absorber. The main improvement point of the present utility model is to facilitate the heat dissipation of the shock absorber. As Figures 1 to 6As shown, when the magnetorheological fluid shock absorber in the present utility model is in use, when the shock absorber body 1 is working, the piston rod inside it will move up and down with the working cylinder. When the piston rod of the shock absorber body 1 rises, it will drive the bellows upper shell 302 to open, thereby enabling the air intake system 6 to intake air. At this time, the air outlet system 5 on both sides of the lower shell 301 does not work. The air intake system 6 will suck natural air into the bellows upper shell 302. When the piston rod moves downward, it will discharge the just-sucked air through the air outlet system 5. The air outlet system 5 is located on both sides of the working cylinder, so that the heat generated when the working cylinder moves by the piston rod is first on the outside of the lower shell 301, and then is exchanged by natural air and discharged through the air outlet system 5. With such a setting, through the heat exchange of natural air, the heat on the outer wall of the working cylinder of the shock absorber body 1 can be dissipated, thereby enabling the shock absorber body 1 to be cooled, and further improving the heat dissipation effect of the shock absorber body 1.

[0025] As Figure 2 , Figure 5 and Figure 6 shown, an upper fixing ring 7 is sleeved on the outside of the top shell 303 in a threaded manner. The upper fixing ring 7 is sleeved and threadedly connected to the outside of the piston rod of the shock absorber body 1. The bottom outer wall of the lower shell 301 is threadedly connected to a lower fixing ring 8. The lower fixing ring 8 is sleeved and threadedly connected to the outer wall of the working cylinder of the shock absorber body 1.

[0026] Specifically, in order to facilitate the installation and disassembly of the top shell 303 and the lower shell 301, before the spring is installed, the top shell 303 and the lower shell 301 can be sleeved on the outside of the shock absorber body 1, and then the upper fixing ring 7 and the lower fixing ring 8 are respectively installed with the shock absorber body 1, the top shell 303, and the lower shell 301. The upper fixing ring 7 and the lower fixing ring 8 can also be connected to the top shell 303 and the lower shell 301 through interference fit, or can be connected through threaded connection.

[0027] As Figure 2 , Figure 3 and Figure 4 shown, both the air outlet system 5 and the air intake system 6 are set as one-way valves. Setting both the air outlet system 5 and the air intake system 6 as one-way valves enables the air intake system 6 not to exhaust air outward when the air outlet system 5 is exhausting air. Similarly, when the air intake system 6 is intaking air, the air outlet system 5 does not work, so as to stably ensure the heat exchange effect. The one-way valve here is an existing mature technology and will not be elaborated too much here.

[0028] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, heat dissipation fins 4 are fixedly connected to the outer wall of the lower shell 301. The setting of the heat dissipation fins 4 can increase the heat dissipation effect of the lower shell 301.

[0029] As Figure 5As shown, an upper sealing ring 71 is sleeved inside the upper fixing ring 7, and the upper sealing ring 71 abuts against the top surface of the top shell 303. By using the upper sealing ring 71, the relative seal between the top shell 303 and the piston rod can be ensured, and air leakage can be avoided.

[0030] As Figure 6 shown, a lower sealing ring 81 is sleeved inside the lower fixing ring 8, and the lower sealing ring 81 abuts against the bottom surface of the lower shell 301. By using the lower sealing ring 81, air leakage between the lower shell 301 and the working cylinder can be avoided.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A magnetorheological fluid damper, comprising a damper body (1) sleeved in a damping spring (2), characterized in that: The outer side of the shock absorber body (1) is provided with a heat sink (3), the heat sink (3) is located between the shock absorber spring (2) and the shock absorber body (1), the heat sink (3) comprises a lower shell (301), an organ upper shell (302) and a top shell (303), the lower shell (301) is sleeved on the outer side of the working cylinder of the shock absorber body (1), the top of the lower shell (301) is fixedly connected to the organ upper shell (302), the top shell (303) is fixedly connected to the top of the organ upper shell (302), and the top shell (303) is sleeved on the outer side of the piston rod of the shock absorber body (1), an air inlet system (6) is provided on one side of the top of the top shell (303), and an air outlet system (5) is provided on both sides of the outer wall of the lower shell (301), and the air outlet system (5) is connected to the air inlet system (6) through the lower shell (301), the organ upper shell (302) and the top shell (303).

2. A magnetorheological fluid damper according to claim 1, characterized in that: An upper fixing ring (7) is threadedly sleeved on the outer side of the top shell (303), and the upper fixing ring (7) is sleeved on the outer side of the piston rod of the shock absorber body (1) and threadedly connected. A lower fixing ring (8) is threadedly connected on the bottom outer wall of the lower shell (301), and the lower fixing ring (8) is sleeved on the outer wall of the working cylinder of the shock absorber body (1) and threadedly connected.

3. A magnetorheological fluid damper according to claim 1 or 2, characterized in that: The air outlet system (5) and the air inlet system (6) are both provided with one-way valves.

4. A magnetorheological fluid damper according to claim 1 or 2, characterized in that: The outer wall of the lower shell (301) is fixedly connected with heat dissipation fins (4).

5. The magnetorheological fluid damper according to claim 3, characterized in that: The outer wall of the lower shell (301) is fixedly connected with heat dissipation fins (4).

6. A magnetorheological fluid damper according to claim 2 or 5, characterized in that: An upper sealing ring (71) is sleeved inside the upper fixing ring (7), and the upper sealing ring (71) abuts against the top surface of the top shell (303).

7. A magnetorheological fluid damper according to claim 2 or 5, characterized in that: A lower sealing ring (81) is sleeved inside the lower fixing ring (8), and the lower sealing ring (81) abuts against the bottom surface of the lower shell (301).

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