Valve type magnetorheological damper

Abstract

The invention provides a valve type magnetorheological damper. The valve type magnetorheological damper comprises a cylinder barrel and a piston rod, the piston rod is sleeved with a first end cover and a second end cover in a spaced mode, a first magnetic conductive disc is arranged on the inner side of the first end cover, and the first magnetic conductive disc and the first end cover are spaced to form a first channel; a second magnetic conductive disc is arranged on the inner side of the second end cover, and the second magnetic conductive disc and the second end cover are spaced to form a radial second channel; third channels which are respectively communicated with the first channel and the rod cavity of the cylinder barrel are arranged in a first magnetic conducting piece, a magnetic isolating piece and a second magnetic conducting piece on the piston rod; the magnetic conductive ring assemblies which are sleeved at intervals form a fourth channel, and the fourth channel is communicated with the first channel and the second channel; the magnetic conductive disc assemblies are sleeved at intervals to form a fifth channel, and the fifth channel is communicated with the other rod cavity of the cylinder barrel and the second channel. The length of an effective damping channel is increased, the output damping force is increased, and the space of the piston head is efficiently utilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dampers, in particular to a valve type magneto-rheological damper. BACKGROUND

[0002] As a new type of semi-active control device, the magneto-rheological damper is considered to be one of the most promising intelligent damping devices because of its simple structure, fast response, wide adaptability, continuous adjustable damping force and other advantages. In the early magneto-rheological damper, the working mode of the magneto-rheological fluid is mostly shear type, and the effective damping channel of such working mode is short. In order to effectively improve the utilization rate of the damping channel and the maximum output force of the magneto-rheological damper, the working mode of the magneto-rheological fluid is flow type, and the design starts to use a serpentine flow channel. Although the length of the effective damping channel can be effectively extended to a certain extent, there are still problems such as low utilization rate of the piston head space and low utilization rate of the magnetic field, and the length of the effective damping channel still has room for extension.

[0003] For example, the existing patent with publication number CN113007261A discloses a tooth-shaped magneto-rheological damper. The design sets a tooth-shaped structure on the surface of the magnetic conducting ring of the piston, changes the original "annular" effective damping channel of the traditional magneto-rheological damper into a "tooth-shaped" one, and improves the magnetic concentration effect. However, the problems of short effective damping channel length and low utilization rate of the radial space of the piston head are still prominent.

[0004] For another example, the existing patent with publication number CN217977165U discloses a multi-stage baffling curved magnetic circuit type magneto-rheological damper. The upper and lower folding structures of the coil are set to effectively utilize the axial upper and lower space positions of the coil. Although the magnetic flux lines can pass through the outer annular damping channel of the coil perpendicularly by setting a magnetic shielding ring in the outer space of the coil to achieve the purpose of utilizing the outer diameter space of the coil, this structure fails to maximize the utilization of the inner diameter space of the coil.

[0005] In addition, the orientation names mentioned in the present application are generally recognized by those skilled in the art as follows:

[0006] Inner side (inner surface): refers to the side surface of each part close to each other (i.e. face to face), i.e. the side close to the center of the piston head; otherwise, it is the outer side (outer surface). SUMMARY

[0007] The purpose of the present application is to provide a valve type magneto-rheological damper to solve the problems of short effective damping channel, low utilization rate of the piston head space, insufficient utilization rate of the magnetic field, and small adjustable range of the output damping force in the existing magneto-rheological damper.

[0008] The technical scheme of the present application is: a valve type magneto-rheological damper, comprising a cylinder filled with magneto-rheological fluid and a piston rod reciprocating in the cylinder, a first end cover and a second end cover are sleeved on the piston rod, a first magnetic conducting disc is arranged on the inner side of the first end cover, the middle outer surface of the first magnetic conducting disc is spaced from the first end cover to form a radial first channel, the remaining outer surface of the first magnetic conducting disc is attached to the first end cover, and a first magnetic shielding disc is arranged on the inner side of the first magnetic conducting disc; a second magnetic conducting disc is arranged on the inner side of the second end cover, the middle outer surface of the second magnetic conducting disc is attached to the second end cover, the remaining outer surface of the second magnetic conducting disc is spaced from the second end cover to form a radial second channel, and a second magnetic shielding disc is arranged on the inner side of the second magnetic conducting disc;

[0009] A first magnetic conducting member, a magnetic shielding member and a second magnetic conducting member are further sleeved on the piston rod in sequence, the outer surface of the first magnetic conducting member is in contact with the inner surface of the first end cover and the first magnetic shielding disc respectively, and the outer surface of the second magnetic conducting member is in contact with the inner surface of the second end cover and the second magnetic shielding disc respectively; the first magnetic conducting member, the magnetic shielding member and the second magnetic conducting member are provided with an axially communicated third channel, and the third channel is communicated with the first channel and one rod cavity of the cylinder respectively;

[0010] A magnetic conducting ring assembly is sleeved on the outer circle of the first magnetic conducting member, the magnetic shielding member and the second magnetic conducting member in sequence, and a fourth channel is formed by the interval, one end of the fourth channel is communicated with the first channel through the first magnetic shielding disc and the first magnetic conducting disc, and the other end of the fourth channel is communicated with the second channel through the second magnetic shielding disc and the second magnetic conducting disc; the inner and outer surfaces of the magnetic conducting ring assembly are connected with the first magnetic shielding disc and the second magnetic shielding disc respectively;

[0011] A magnetic conducting disc assembly is sleeved on the outer circle of the first magnetic conducting disc, the first magnetic shielding disc, the magnetic conducting ring assembly, the second magnetic shielding disc and the second magnetic conducting disc in sequence, and a fifth channel is formed by the interval, one end of the fifth channel is communicated with the other rod cavity of the cylinder through the first end cover, and the other end of the fifth channel is communicated with the second channel.

[0012] In the above scheme, by designing three annular damping channels, the coil radial space and the coil axial space are effectively utilized, and two magnetic conducting members, one magnetic shielding member, one magnetic conducting ring assembly and one magnetic conducting disc assembly are arranged on both sides of the coil radially, so that the magnetic lines are forced to pass through the damping channel vertically, the length of the effective damping channel is increased, the output damping force is increased, and the piston head space is effectively utilized.

[0013] Preferably, the side surface of the first magnetic conducting member and the second magnetic conducting member close to each other is provided with a first clamping groove, and the inner and outer surfaces of the magnetic shielding member are provided with a first clamping ring matched with the two first clamping grooves.

[0014] Preferably, the first end cover and the first magnetic isolation disc are provided with second clamping grooves on the side surfaces close to each other, and the first magnetic conducting disc is provided with second clamping rings on the inner and outer surfaces and matched with the two second clamping grooves.

[0015] Preferably, the second end cover and the second magnetic isolation disc are provided with third clamping grooves on the side surfaces close to each other, and the second magnetic conducting disc is provided with third clamping rings on the inner and outer surfaces and matched with the two third clamping grooves.

[0016] Preferably, the inner surface of the second end cover is provided with a fourth clamping groove, and the outer surface of the second magnetic conducting disc is provided with a fourth clamping ring matched with the fourth clamping groove.

[0017] Preferably, the magnetic conducting ring assembly comprises a first magnetic conducting ring, a coil and a second magnetic conducting ring which are sequentially sleeved from inside to outside, the first magnetic conducting ring is sleeved with the first magnetic conducting member, the magnetic isolation member and the second magnetic conducting member to form the fourth channel, and the second magnetic conducting ring is sleeved with the magnetic conducting disc assembly to form the fifth channel.

[0018] Preferably, the first magnetic conducting ring is matched with the first magnetic isolation disc and the second magnetic isolation disc respectively, the second magnetic conducting ring is matched with the first magnetic isolation disc, the outer circle of the second magnetic isolation disc is sleeved with a first magnetic isolation ring, and the first magnetic isolation ring is matched with the second magnetic conducting ring.

[0019] Preferably, the magnetic conducting disc assembly comprises a fourth magnetic conducting ring, a second magnetic isolation ring and a third magnetic conducting ring which are sequentially connected in the axial direction, one end of the fourth magnetic conducting ring is matched with the first end cover, one end of the third magnetic conducting ring is matched with the second end cover, and the fourth magnetic conducting ring, the second magnetic isolation ring and the third magnetic conducting ring are sleeved with the magnetic conducting ring assembly to form the fifth channel.

[0020] Preferably, the piston rod comprises a first connecting shaft and a second connecting shaft, the first end cover comprises a first cover part and a first shaft part connected to the first cover part, the second end cover comprises a second cover part and a second shaft part connected to the second cover part, one end of the first shaft part is sequentially sleeved with the first magnetic conducting member, the magnetic isolation member, the second magnetic conducting member, the second shaft part and the second connecting shaft, the other end of the first shaft part is connected with the first connecting shaft, the first magnetic conducting disc is arranged on the inner side of the first cover part, and the second magnetic conducting disc is arranged on the inner side of the second cover part.

[0021] Preferably, one end of the cylinder barrel is connected with a hanging barrel, one end of the piston rod extends into the hanging barrel, and the other end of the piston rod extends to the outside of the cylinder barrel.

[0022] Compared with the related art, the present application has the following beneficial effects:

[0023] I. The present application effectively utilizes the coil radial space and the coil axial space by designing three annular damping channels, and simultaneously placing two magnetic conductive members, one magnetic shielding member, one magnetic conductive ring assembly and one magnetic conductive disc assembly on both sides of the coil, forcing the magnetic lines to meander vertically through the damping channels, increasing the length of the effective damping channel, increasing the output damping force, and efficiently utilizing the piston space.

[0024] II. The present application arranges multiple magnetic conductive and magnetic shielding parts around the coil, forcing the magnetic lines to meander vertically through the damping channels, greatly improving the magnetic field utilization rate, and solving the problems of short effective damping channel and insufficient magnetic field utilization rate.

[0025] III. Compared with the traditional single-coil magneto-rheological damper, the current structure is the structure that can maximize the utilization of the coil inner and outer ring space on the basis of increasing the length of the effective damping channel.

[0026] IV. The magnetic conductive and magnetic shielding parts of the present application directly adopt the clamping method of clamping ring and clamping groove cooperation to realize reliable connection. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The present application provides a schematic diagram of the structure of the valve type magneto-rheological damper.

[0028] Figure 2 is Figure 1 the enlarged schematic diagram of A in

[0029] Figure 3 is a sectional view of the first magnetic conductive member.

[0030] In the drawings: 1, first magnetic conductive disc; 2, first magnetic shielding disc; 3, first magnetic conductive member; 4, magnetic shielding member; 5, second magnetic conductive member; 6, first magnetic conductive ring; 7, second magnetic shielding disc; 8, second magnetic conductive ring; 9, first magnetic shielding ring; 10, second magnetic conductive disc; 11, fourth magnetic conductive ring; 12, second magnetic shielding ring; 13, third magnetic conductive ring; 14, first end cover; 141, first cover part; 142, first shaft part; 15, second end cover; 151, second cover part; 152, second shaft part; 16, first connecting shaft; 17, second connecting shaft; 18, cylinder; 181, cylinder body; 19, third end cover; 20, fourth end cover; 21, hanging cylinder; 22, coil; 23, first channel; 24, second channel; 25, third channel; 26, fourth channel; 27, fifth channel; 28, magnetic conductive ring assembly; 29, magnetic conductive disc assembly; 30, first clamping groove; 31, first clamping ring; 32, second clamping groove; 33, second clamping ring; 34, third clamping groove; 35, third clamping ring; 36, fourth clamping groove; 37, fourth clamping ring. DETAILED DESCRIPTION

[0031] The application will be described in detail below with reference to the drawings and embodiments. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if "up", "down", "left", "right" appear in the following, they only mean the up, down, left and right directions of the drawings themselves, and do not limit the structure.

[0032] As shown in Figure 1 , Figure 2 , the valve type magneto-rheological damper provided by the embodiment includes a cylinder 18, a piston rod reciprocating in the cylinder 18, and a piston head mounted on the piston rod. The cylinder 18 includes a cylinder body 181, a third end cover 19 covering one end of the cylinder body 181, and a fourth end cover 20 covering the other end of the cylinder body 181. An overhang cylinder 21 is connected to the outer surface of the fourth end cover 20. In use, the overhang cylinder 21 faces downward. The piston rod includes a first connecting shaft 16 and a second connecting shaft 17. One end of the first connecting shaft 16 extends to the outside of the third end cover 19, and one end of the second connecting shaft 17 extends from the fourth end cover 20 into the overhang cylinder 21.

[0033] The first end cover 14 includes a first cover part 141 and a first shaft part 142 connected to the first cover part 141. The second end cover 15 includes a second cover part 151 and a second shaft part 152 connected to the second cover part 151. The other end of the first connecting shaft 16 is threadedly connected to one end of the first shaft part 142. The other end of the first shaft part 142 is successively sleeved with a first magnetic guide 3, a magnetic isolation piece 4, a second magnetic guide 5, and a second shaft part 152, and threadedly connected with the second connecting shaft 17.

[0034] The first cover part 141 and the second cover part 151 are arranged at intervals to form the rim of the piston head, and a first magnetic guide disc 1, a first magnetic isolation disc 2, a magnetic guide ring assembly 28, a magnetic guide disc assembly 29, a second magnetic isolation disc 7, and a second magnetic guide disc 10 are arranged between the first cover part 141 and the second cover part 151 to form the piston head, thereby forming a built-in valve type structure.

[0035] A first guide disk 1 is provided inside the first cover portion 141 of the first end cap 14. A central outer surface of the first guide disk 1 is spaced apart from the first cover portion 141 of the first end cap 14 to form a radial first channel 23. The remaining outer surface of the first guide disk 1 is in contact with the first cover portion 141 of the first end cap 14. A first spacer disk 2 is provided inside the first guide disk 1. A second guide disk 10 is provided inside the second cover portion 151 of the second end cap 15. A central outer surface of the second guide disk 10 is in contact with the second cover portion 151 of the second end cap 15. The remaining outer surface of the second guide disk 10 is spaced apart from the second cover portion 151 of the second end cap 15 to form a radial second channel 24. A fourth retaining groove 36 is provided on the inner surface of the second end cap 15. A fourth retaining ring 37 is provided on the outer surface of the second guide disk 10, which engages with the fourth retaining groove 36. A second spacer disk 7 is provided inside the second guide disk 10.

[0036] The outer surface of the first magnetic conductive member 3 is in contact with the inner surface of the first end cover 14 and the first isolating disk 2, and the outer surface of the second magnetic conductive member 5 is in contact with the inner surface of the second end cover 15 and the second isolating disk 7. Figure 3 As shown, the first magnetic conductive member 3 and the second magnetic conductive member 5 are symmetrically mounted and have identical structures. Axial communication is provided between the first magnetic conductive member 3, the magnetic isolation member 4, and the second magnetic isolation member 5. One end of the third channel 25 extends through the first magnetic isolation disk 2 and communicates with the first conductive disk 1 and the first channel 23. The other end of the third channel 25 extends through the second magnetic isolation disk 7 and the second conductive disk 10 and communicates with a rod cavity in the cylinder 18.

[0037] A magnetic conductive ring assembly 28 is spaced apart on the outer circumferences of the first magnetic conductive member 3, the magnetic isolation member 4, and the second magnetic conductive member 5, forming a fourth channel 26. The magnetic conductive ring assembly 28 includes a first magnetic conductive ring 6, a coil 22, and a second magnetic conductive ring 8, which are spaced apart from each other from the inside out. The first magnetic conductive ring 6 is spaced apart from the first magnetic conductive member 3, the magnetic isolation member 4, and the second magnetic conductive member 5 to form the fourth channel 26. The second magnetic conductive ring 8 is spaced apart from each other to form the magnetic conductive disk assembly 29 to form the fifth channel 27. One end of the fourth channel 26 passes through the first isolation magnetic disk 2 and the first conductive disk 1 to communicate with the first channel 23, while the other end of the fourth channel 26 passes through the second isolation magnetic disk 7 and the second conductive disk 10 to communicate with the second channel 24.

[0038] The two radial outer surfaces of the first magnetic conductive ring 6 are respectively clamped to the first and second magnetic isolating disks 2 and 7, in a clamping ring and slot assembly. One outer surface of the second magnetic conductive ring 8 is clamped to the first magnetic isolating disk 2. A first magnetic isolating ring 9 is mounted on the outer circumference of the second magnetic isolating disk 7, and the first magnetic isolating ring 9 is clamped to the other outer surface of the second magnetic conductive ring 8.

[0039] The first conductive disk 1, the first isolation disk 2, the magnetic conductive ring assembly 28, the second isolation disk 7, and the second conductive disk 10 are spaced apart on their outer circumferences, and the spaced apart conductive disk assembly 29 forms a fifth channel 27. The conductive disk assembly 29 includes a fourth magnetic conductive ring 11, a second magnetic isolation ring 12, and a third magnetic conductive ring 13 connected in sequence in the axial direction. One end of the fourth magnetic conductive ring 11 is clamped to the first end cover 14, and one end of the third magnetic conductive ring 13 is clamped to the second end cover 15. The fourth magnetic conductive ring 11, the second magnetic isolation ring 12, and the third magnetic conductive ring 13 are spaced apart and fitted with the magnetic conductive ring assembly 28 to form the fifth channel 27. One end of the fifth channel 27 passes through the first end cover 14 and communicates with the other rod cavity of the cylinder 18, and the other end of the fifth channel 27 communicates with the second channel 24.

[0040] The first magnetic conductive member 3 and the second magnetic conductive member 5 are both provided with a first clamping groove 30 on their surfaces adjacent to each other, and the magnetic isolation member 4 is provided with a first clamping ring 31 that is clamped one-to-one with the two first clamping grooves 30 on its inner and outer surfaces.

[0041] The first cover portion 141 and the first spacer disk 2 are both provided with second slots 32 on their adjacent surfaces, and the first guide disk 1 is provided with second snap rings 33 that are snapped into the two second slots 32 one by one on its inner and outer surfaces.

[0042] The second cover portion 151 and the second spacer disk 7 are both provided with a third clamping groove 34 on their adjacent surfaces, and the second guide disk 10 is provided with a third clamping ring 35 on its inner and outer surfaces. The third clamping ring 35 is fixed to the two third clamping grooves 34 one by one.

[0043] The present invention only arranges the coil 22 on the outer circle of the first magnetic ring 6. This single coil arrangement structure places the damping channel in the radial inner and outer spaces of the coil 22, effectively utilizing the space around the coil, reducing the axial size and making the structure compact.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A valve type magnetorheological damper comprising a cylinder (18) filled with a magnetorheological fluid and a piston rod reciprocating within the cylinder (18), characterized in that, The first end cover (14) is internally provided with a first magnetic conducting disc (1), the middle outer surface of the first magnetic conducting disc (1) is spaced from the first end cover (14) to form a radial first channel (23), the remaining outer surface of the first magnetic conducting disc (1) is attached to the first end cover (14), and the inner side of the first magnetic conducting disc (1) is provided with a first magnetic shielding disc (2); the inner side of the second end cover (15) is provided with a second magnetic conducting disc (10), the middle outer surface of the second magnetic conducting disc (10) is attached to the second end cover (15), the remaining outer surface of the second magnetic conducting disc (10) is spaced from the second end cover (15) to form a radial second channel (24), and the inner side of the second magnetic conducting disc (10) is provided with a second magnetic shielding disc (7). The first magnetic conducting member (3), the magnetic shielding member (4) and the second magnetic conducting member (5) are sequentially sleeved on the piston rod, the outer surface of the first magnetic conducting member (3) is in contact with the inner surface of the first end cover (14) and the first magnetic shielding disc (2) respectively, the outer surface of the second magnetic conducting member (5) is in contact with the inner surface of the second end cover (15) and the second magnetic shielding disc (7) respectively, and the first magnetic conducting member (3), the magnetic shielding member (4) and the second magnetic conducting member (5) are provided with an axial third channel (25) in communication. The outer circle of the first magnetic conducting member (3), the magnetic shielding member (4) and the second magnetic conducting member (5) is sleeved with a magnetic ring assembly (28) at intervals, the interval forms a fourth channel (26), one end of the fourth channel (26) penetrates the first magnetic shielding disc (2) and the first magnetic conducting disc (1) and communicates with the first channel (23), the other end of the fourth channel (26) penetrates the second magnetic shielding disc (7) and the second magnetic conducting disc (10) and communicates with the second channel (24), and the inner and outer surfaces of the magnetic ring assembly (28) are connected with the first magnetic shielding disc (2) and the second magnetic shielding disc (7) respectively. The outer circle of the first magnetic conducting disc (1), the first magnetic shielding disc (2), the magnetic ring assembly (28), the second magnetic shielding disc (7) and the second magnetic conducting disc (10) is sleeved with a magnetic disc assembly (29) at intervals, the interval forms a fifth channel (27), one end of the fifth channel (27) penetrates the first end cover (14) and communicates with the other rod cavity of the cylinder barrel (18), and the other end of the fifth channel (27) communicates with the second channel (24).

2. The valved magneto-rheological damper of claim 1, wherein, The side surface of the first magnetic conducting member (3) and the second magnetic conducting member (5) close to each other is provided with a first clamping groove (30), and the inner and outer surfaces of the magnetic shielding member (4) are provided with a first clamping ring (31) matched with the two first clamping grooves (30) respectively.

3. The valved magneto-rheological damper of claim 1, wherein, The side surface of the first end cover (14) and the first magnetic shielding disc (2) close to each other is provided with a second clamping groove (32), and the inner and outer surfaces of the first magnetic conducting disc (1) are provided with a second clamping ring (33) matched with the two second clamping grooves (32) respectively.

4. The valved magneto-rheological damper of claim 1, wherein, The inner and outer surfaces of the second end cover (15) and the second magnetic isolation disc (7) are provided with third clamping grooves (34) on the side surfaces close to each other, and the inner and outer surfaces of the second magnetic conducting disc (10) are provided with third clamping rings (35) clamped with the two third clamping grooves (34) one by one.

5. The valved magneto-rheological damper of claim 1, wherein, The inner surface of the second end cover (15) is provided with a fourth clamping groove (36), and the outer surface of the second magnetic conducting disc (10) is provided with a fourth clamping ring (37) clamped with the fourth clamping groove (36).

6. The valved magneto-rheological damper of claim 1, wherein, The magnetic conducting ring assembly (28) comprises a first magnetic conducting ring (6), a coil (22) and a second magnetic conducting ring (8) which are sequentially sleeved from inside to outside, the first magnetic conducting ring (6) is sleeved with the first magnetic conducting member (3), the magnetic isolation member (4) and the second magnetic conducting member (5) to form the fourth channel (26); the second magnetic conducting ring (8) is sleeved with the magnetic disc assembly (29) to form the fifth channel (27).

7. The valved magneto-rheological damper of claim 6, wherein, The first magnetic conducting ring (6) is clamped with the first magnetic isolation disc (2) and the second magnetic isolation disc (7) respectively, and the second magnetic conducting ring (8) is clamped with the first magnetic isolation disc (2); the outer circle of the second magnetic isolation disc (7) is sleeved with a first magnetic isolation ring (9), and the first magnetic isolation ring (9) is clamped with the second magnetic conducting ring (8).

8. The valved magneto-rheological damper of claim 1, wherein, The magnetic disc assembly (29) comprises a fourth magnetic conducting ring (11), a second magnetic isolation ring (12) and a third magnetic conducting ring (13) which are sequentially connected in the axial direction, one end of the fourth magnetic conducting ring (11) is clamped with the first end cover (14), one end of the third magnetic conducting ring (13) is clamped with the second end cover (15), and the fourth magnetic conducting ring (11), the second magnetic isolation ring (12) and the third magnetic conducting ring (13) are sleeved with the magnetic conducting ring assembly (28) to form the fifth channel (27).

9. The valved magneto-rheological damper of claim 1, wherein, The piston rod comprises a first connecting shaft (16) and a second connecting shaft (17), the first end cover (14) comprises a first cover portion (141) and a first shaft portion (142) connected to the first cover portion (141); the second end cover (15) comprises a second cover portion (151) and a second shaft portion (152) connected to the second cover portion (151); one end of the first shaft portion (142) is sequentially sleeved with the first magnetic conducting member (3), the magnetic isolation member (4), the second magnetic conducting member (5), the second shaft portion (152) and is connected with the second connecting shaft (17); the other end of the first shaft portion (142) is connected with the first connecting shaft (16); the first magnetic conducting disc (1) is arranged on the inner side of the first cover portion (141), and the second magnetic conducting disc (10) is arranged on the inner side of the second cover portion (151).

10. The valved magneto-rheological damper of claim 1, wherein, One end of the cylinder (18) is connected with a lifting cylinder (21), one end of the piston rod extends into the lifting cylinder (21), and the other end of the piston rod extends to the outside of the cylinder (18).

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