Bidirectional independent adjustment magneto-rheological damper

Abstract

The invention relates to the technical field of dampers, in particular to a bidirectional independent adjustment magnetorheological damper, which realizes independent adjustment of recovery damping force and compression damping force on the magnetorheological damper through the special design of a flow channel in a composite magnetic conductive iron core and the cooperation of a recovery force adjustment magnetic conductive coil and a compression force adjustment magnetic conductive coil. The original advantage of quick response of the magneto-rheological shock absorber is reserved, and meanwhile the contradictory problem of riding comfort and controllability of a vehicle is well solved; comprising a cylinder barrel assembly; the damper further comprises a piston rod assembly and a flow channel assembly, the piston rod assembly is installed on the cylinder barrel assembly and drives the flow channel assembly to ascend and descend, and the flow channel assembly is installed on the piston rod assembly and adjusts recovery damping force and compression damping.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, in particular to a bidirectional independently adjustable magnetorheological shock absorber. Background Art

[0002] Magnetorheological shock absorbers are a new type of intelligent shock absorber that can control the output damping force by controlling the magnitude of the current, thereby achieving a semi-active control effect. Therefore, they have been widely used in the automotive field. Compared with general shock absorbers, magnetorheological shock absorbers have a faster response speed, continuously adjustable damping force, a simpler structure, and better control effect.

[0003] Existing magnetorheological shock absorbers, such as the one disclosed in the invention patent with application number 202421497268.6, have a main structure including a cylinder body, one end of which is open, an upper end cover is provided in the opening, the cylinder body is filled with a damping medium, the piston assembly is slidably arranged in the cylinder body, and the space in the cylinder body is divided into an upper cavity and a lower cavity, and the piston assembly is provided with a piston outer cylinder and a piston end cover at both ends for spin-fitting, the piston rod is connected to one end of the piston assembly through a stop ring design, and the coil is placed outside, and the coil is located between the piston core and the piston outer cylinder.

[0004] However, existing magnetorheological shock absorbers are basically bidirectional and single-channel. Under different working conditions, vehicles sometimes need to increase the restoring damping force and reduce the compression damping force at the same time, and sometimes need to increase the compression damping force and reduce the restoring damping force. Traditional magnetorheological shock absorbers cannot achieve good control effects. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a two-way independently adjustable magnetorheological shock absorber that realizes independent adjustment of the restoring damping force and the compression damping force on the magnetorheological shock absorber through the special design of the flow channel in the composite magnetic conductive core, in combination with the restoring force adjusting magnetic conductive coil and the compression force adjusting magnetic conductive coil, thereby retaining the original rapid response advantage of the magnetorheological shock absorber, and at the same time also well solves the contradictory problem of vehicle ride comfort and controllability.

[0006] The bidirectional independently adjustable magnetorheological shock absorber of the present invention includes a cylinder assembly; it also includes a piston rod assembly and a flow channel assembly. The piston rod assembly is installed on the cylinder assembly and drives the flow channel assembly to rise and fall. The flow channel assembly is installed on the piston rod assembly and adjusts the restoring damping force and compression damping. The cylinder assembly is installed in the working position. When the piston rod assembly is subjected to pressure, it drives the flow channel assembly to descend and buffer, thereby reducing the vibration force. At the same time, the flow channel assembly can independently adjust the restoring damping force and compression damping force.

[0007] Preferably, the cylinder assembly includes a mounting fork, a cylinder body, an anti-collision cover and a floating piston assembly, the mounting fork is installed in the working position, the bottom end of the cylinder body is connected to the top end of the mounting fork, a cavity is provided inside the cylinder body, the anti-collision cover is installed at the top end of the cylinder body, the floating piston assembly is slidably installed in the cavity of the cylinder body, and high-pressure nitrogen of a specified pressure is filled below the floating piston assembly, and magnetorheological fluid is filled above the floating piston assembly; the mounting fork is installed in the working position, and the magnetorheological fluid and high-pressure nitrogen are conveniently stored by arranging the cylinder body and the anti-collision cover, and the pressure of the magnetorheological fluid and high-pressure nitrogen is conveniently balanced by the floating piston assembly.

[0008] Preferably, the piston rod assembly includes an oil seal guide assembly, a buffer assembly and a piston rod. The oil seal guide assembly is installed in the cavity of the cylinder body. The top end of the buffer assembly is connected to the bottom end of the oil seal guide assembly. The piston rod is slidably installed on the oil seal guide assembly. The top end of the piston rod is connected to the workpiece, and the workpiece is vibrated to drive the piston rod to rise and fall. The oil seal guide assembly encapsulates the magnetorheological fluid to prevent overflow due to excessive pressure, and the buffer assembly slows down the movement stroke of the oil seal guide assembly.

[0009] Preferably, the flow channel assembly includes an upper one-way valve assembly, an upper magnetic isolation gasket, a composite magnetic conductive core, a piston, a first O-ring, a retaining spring, a second O-ring, a restoring force regulating magnetic coil, a compression force regulating magnetic coil, a lower magnetic isolation gasket and a lower one-way valve assembly, the top end of the upper one-way valve assembly is connected to the bottom end of the piston rod, the top end of the upper magnetic isolation gasket is connected to the bottom end of the upper one-way valve assembly, the top end of the composite magnetic conductive core is connected to the bottom end of the upper magnetic isolation gasket, the piston is installed on the composite magnetic conductive core, the first O-ring is installed between the composite magnetic conductive core and the piston, the retaining spring is installed between the piston rod and the composite magnetic conductive core, the second O-ring is installed between the piston rod and the composite magnetic conductive core, the restoring force regulating magnetic coil is installed on the composite magnetic conductive core, the compression force regulating magnetic coil is installed on the composite magnetic conductive core, the top end of the lower ... The end is connected to the bottom end of the composite magnetic conductive core, and the top of the lower one-way valve assembly is connected to the bottom end of the lower magnetic isolation gasket; a throttling annular channel is formed between the upper magnetic isolation gasket, the composite magnetic conductive core and the lower magnetic isolation gasket, and the throttling annular channel is divided into an upper throttling annular channel and a lower throttling annular channel by arranging a first O-ring. The upper one-way valve assembly, the upper magnetic isolation gasket and the upper throttling annular channel form a one-way channel for the recovery oil circuit, and the lower magnetic isolation gasket, the lower one-way valve assembly and the lower throttling annular channel form a one-way channel for the compression oil circuit. When the oil flows from top to bottom through the upper throttling annular channel, the magnitude of the magnetic coil current is adjusted by changing the restoring force, and the restoring damping force is adjusted. When the oil flows from bottom to top through the lower throttling annular channel, the magnitude of the magnetic coil current is adjusted by changing the compression force, and the compression damping force is adjusted.

[0010] Preferably, the upper magnetic isolation gasket is made of a composite material, the upper and lower parts are made of soft magnetic materials with high magnetic permeability, and the middle part is made of a metal material with good electromagnetic shielding properties; by arranging a metal material with good electromagnetic shielding properties in the middle, the mutual interference between the restoring force regulating magnetic coil and the compression force regulating magnetic coil is avoided, and the magnetic field strength of the coil design is effectively guaranteed, thereby ensuring the adjustable range of the restoring resistance and the compression resistance.

[0011] Preferably, it also includes a restoring force adjustment magnetic coil and a compression force adjustment magnetic coil. According to the needs of the restoring damping force and the compression damping force adjustment range, each coil can be wound with 1-4 coils to form a group, the wire diameter is generally 0.2-2mm, and the total number of turns of each group of coils is generally 50-800 turns.

[0012] Preferably, the piston is made of a soft magnetic material with high magnetic permeability.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the cylinder assembly is installed in the working position, and when the piston rod assembly is subjected to pressure, it drives the flow channel assembly to descend and buffer, thereby reducing the vibration force. At the same time, the flow channel assembly can independently adjust the restoring damping force and the compression damping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 2 1 is a schematic diagram of a front cross-sectional structure of a cylinder assembly and a piston rod assembly of the present invention; Figure 3 It is a partially enlarged front cross-sectional structural diagram of the flow channel assembly of the present invention; Figure 4 It is a schematic diagram of the axonometric structure of the upper magnetic isolation washer of the present invention.

[0015] Markings in the accompanying drawings: 01, cylinder assembly; 11, mounting fork; 12, cylinder body; 13, anti-collision cover; 14, floating piston assembly; 02, piston rod assembly; 21, oil seal guide assembly; 22, buffer assembly; 23, piston rod; 03, flow channel assembly; 31, upper one-way valve assembly; 32, upper magnetic isolation gasket; 33, composite magnetic core; 34, piston; 35, first O-ring; 36, retaining spring; 37, second O-ring; 38, restoring force adjustment magnetic coil; 39, compression force adjustment magnetic coil; 41, lower magnetic isolation gasket; 42, lower one-way valve assembly. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] like Figures 1 to 4As shown, the bidirectional independently adjustable magnetorheological shock absorber of the present invention includes a cylinder assembly 01; a piston rod assembly 02 and a flow channel assembly 03. The piston rod assembly 02 is installed on the cylinder assembly 01 and drives the flow channel assembly 03 to rise and fall. The flow channel assembly 03 is installed on the piston rod assembly 02 and adjusts the restoring damping force and the compression damping. The cylinder assembly 01 includes a mounting fork 11, a cylinder body 12, an anti-collision cover 13 and a floating piston assembly 14. The mounting fork 11 is installed in the working position, the bottom end of the cylinder body 12 is connected to the top end of the mounting fork 11, the cylinder body 12 is provided with a cavity inside, and the anti-collision cover 13 is installed on the top end of the cylinder body 12. The floating piston assembly 14 is slidably mounted in the cavity of the cylinder body 12, and high-pressure nitrogen of a specified pressure is filled below the floating piston assembly 14, and magnetorheological fluid is filled above the floating piston assembly 14; the piston rod assembly 02 includes an oil seal guide assembly 21, a buffer assembly 22 and a piston rod 23, the oil seal guide assembly 21 is mounted in the cavity of the cylinder body 12, the top of the buffer assembly 22 is connected to the bottom of the oil seal guide assembly 21, and the piston rod 23 is slidably mounted on the oil seal guide assembly 21; the flow channel assembly 03 includes an upper one-way valve assembly 31, an upper magnetic isolation gasket 32, a composite magnetic conductive core 33, a piston 34, a first O-ring 35, a retaining spring 36, and a second O-ring 37. 6. Second O-ring 37, restoring force regulating magnetic coil 38, compression force regulating magnetic coil 39, lower magnetic isolation washer 41 and lower one-way valve assembly 42, the top of the upper one-way valve assembly 31 is connected to the bottom end of the piston rod 23, the top of the upper magnetic isolation washer 32 is connected to the bottom end of the upper one-way valve assembly 31, the top of the composite magnetic conductive core 33 is connected to the bottom end of the upper magnetic isolation washer 32, the piston 34 is mounted on the composite magnetic conductive core 33, the first O-ring 35 is mounted between the composite magnetic conductive core 33 and the piston 34, the retaining spring 36 is mounted between the piston rod 23 and the composite magnetic conductive core 33, and the second O-ring 37 is mounted between the piston rod 23 and the composite magnetic conductive core 33 The restoring force regulating magnetic coil 38 is mounted on the composite magnetic conductive core 33, and the compression force regulating magnetic coil 39 is mounted on the composite magnetic conductive core 33. The top of the lower magnetic isolation washer 41 is connected to the bottom of the composite magnetic conductive core 33, and the top of the lower one-way valve assembly 42 is connected to the bottom of the lower magnetic isolation washer 41. The upper magnetic isolation washer 32 is made of a composite material, the upper and lower parts are made of a soft magnetic material with high magnetic permeability, and the middle part is made of a metal material with good electromagnetic shielding properties. The restoring force regulating magnetic coil 38 and the compression force regulating magnetic coil 39 can be wound according to the requirements of the restoring damping force and compression damping force adjustment range. Each coil can be wound with 1-4 coils to form a group, and the wire diameter is generally 0.2-2mm, the total number of turns of each coil group is generally 50-800 turns; it also includes a piston 34 made of soft magnetic material with high magnetic permeability; when it is working, first, the mounting fork 11 is installed in the working position, and the cylinder body 12 and the anti-collision cover 13 are provided to facilitate the storage of magnetorheological fluid and high-pressure nitrogen. The floating piston assembly 14 is used to facilitate the pressure balance of magnetorheological fluid and high-pressure nitrogen, and the top of the piston rod 23 is connected to the workpiece. The workpiece is vibrated to drive the piston rod 23 to rise and fall, and the oil seal guide assembly 21 encapsulates the magnetorheological fluid to avoid overflow due to excessive pressure. The buffer assembly 22 slows down the movement of the oil seal guide assembly 21, and a throttling annular channel is formed between the upper magnetic isolation gasket 32, the composite magnetic conductive core 33 and the lower magnetic isolation gasket 41. The throttling annular channel is divided into an upper throttling annular channel and a lower throttling annular channel by providing a first O-ring 35. The annular channel and the lower throttle annular channel, the upper one-way valve assembly 31, the upper magnetic isolation gasket 32, and the upper throttle annular channel form a one-way channel for the recovery oil circuit, while the lower magnetic isolation gasket 41, the lower one-way valve assembly 42, and the lower throttle annular channel form a one-way channel for the compression oil circuit. When oil flows from top to bottom through the upper throttle annular channel, the restoring damping force is adjusted by changing the current in the restoring-force regulating magnetic coil 38. When oil flows from bottom to top through the lower throttle annular channel, the compression damping force is adjusted by changing the current in the compression-force regulating magnetic coil 39. By placing a metal material with good electromagnetic shielding properties between the restoring-force regulating magnetic coil 38 and the compression-force regulating magnetic coil 39, mutual interference between them is avoided, effectively ensuring the designed magnetic field strength of the coils, thereby ensuring the adjustable range of the restoring resistance and compression resistance.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bidirectionally independently adjustable magnetorheological shock absorber, comprising a cylinder assembly (01); characterized in that: It also includes a piston rod assembly (02) and a flow channel assembly (03), wherein the piston rod assembly (02) is mounted on the cylinder assembly (01) and drives the flow channel assembly (03) to rise and fall, and the flow channel assembly (03) is mounted on the piston rod assembly (02) and adjusts the restoring damping force and the compression damping.

2. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 1, characterized in that: The cylinder assembly (01) includes a mounting fork (11), a cylinder body (12), an anti-collision cover (13) and a floating piston assembly (14), wherein the mounting fork (11) is mounted on a working position, the bottom end of the cylinder body (12) is connected to the top end of the mounting fork (11), a cavity is provided inside the cylinder body (12), the anti-collision cover (13) is mounted on the top end of the cylinder body (12), the floating piston assembly (14) is slidably mounted in the cavity of the cylinder body (12), and high-pressure nitrogen of a specified pressure is filled below the floating piston assembly (14), and magnetorheological fluid is filled above the floating piston assembly (14).

3. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 2, characterized in that: The piston rod assembly (02) comprises an oil seal guide assembly (21), a buffer assembly (22) and a piston rod (23). The oil seal guide assembly (21) is installed in the cavity of the cylinder body (12). The top end of the buffer assembly (22) is connected to the bottom end of the oil seal guide assembly (21). The piston rod (23) is slidably installed on the oil seal guide assembly (21).

4. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 3, characterized in that: The flow channel assembly (03) includes an upper one-way valve assembly (31), an upper magnetic isolation gasket (32), a composite magnetic conductive core (33), a piston (34), a first O-ring (35), a retaining spring (36), a second O-ring (37), a restoring force regulating magnetic coil (38), a compression force regulating magnetic coil (39), a lower magnetic isolation gasket (41) and a lower one-way valve assembly (42), wherein the top end of the upper one-way valve assembly (31) is connected to the bottom end of the piston rod (23), the top end of the upper magnetic isolation gasket (32) is connected to the bottom end of the upper one-way valve assembly (31), the top end of the composite magnetic conductive core (33) is connected to the bottom end of the upper magnetic isolation gasket (32), and the piston (34) is installed on the composite one-way valve assembly (42). On the composite magnetic core (33), a first O-ring (35) is installed between the composite magnetic core (33) and the piston (34), a retaining spring (36) is installed between the piston rod (23) and the composite magnetic core (33), a second O-ring (37) is installed between the piston rod (23) and the composite magnetic core (33), a restoring force regulating magnetic coil (38) is installed on the composite magnetic core (33), a compression force regulating magnetic coil (39) is installed on the composite magnetic core (33), a top end of a lower magnetic isolation gasket (41) is connected to a bottom end of the composite magnetic core (33), and a top end of a lower one-way valve assembly (42) is connected to a bottom end of the lower magnetic isolation gasket (41).

5. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 4, characterized in that: The upper magnetic isolation gasket (32) is made of a composite material, the upper and lower parts are made of soft magnetic materials with high magnetic permeability, and the middle part is made of a metal material with good electromagnetic shielding properties.

6. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 4, characterized in that: It also includes a restoring force regulating magnetic coil (38) and a compression force regulating magnetic coil (39) which can be wound according to the needs of the restoring damping force and the compression damping force adjustment range. Each coil can be wound with 1 to 4 coils to form a group. The wire diameter is generally 0.2 to 2 mm, and the total number of turns of each group of coils is generally 50 to 800 turns.

7. The bidirectionally independently adjustable magnetorheological shock absorber according to claim 4, characterized in that: The piston (34) is also made of a soft magnetic material with high magnetic permeability.

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