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CN-121977036-A - Magnetorheological vibration damping device, suspension system and automobile

CN121977036ACN 121977036 ACN121977036 ACN 121977036ACN-121977036-A

Abstract

The invention provides a magnetorheological vibration damping device, a suspension system and an automobile, wherein the magnetorheological vibration damping device comprises a fixed cylinder barrel, a screw rod, a movable cylinder barrel, a piston and an excitation coil, the screw rod is rotationally connected with the fixed cylinder barrel, a nut seat is rotationally arranged on the screw rod, the screw rod is in transmission connection with a driver, the movable cylinder barrel comprises an outer cylinder and an inner cylinder which are sleeved with each other, the fixed cylinder barrel is inserted between the outer cylinder barrel and the inner cylinder barrel, the fixed cylinder barrel is attached to the outer cylinder barrel, the inner cylinder barrel is connected with the nut seat, the fixed end of the inner cylinder barrel is attached to the fixed cylinder barrel, a liquid cavity is defined by the fixed cylinder barrel, the inner cylinder barrel and the outer cylinder barrel, the piston separates the liquid cavity into a first cavity and a second cavity, a damping flow passage which is communicated with the first cavity and the second cavity is arranged in the piston, and the excitation coil is used for adjusting the viscosity of magnetorheological fluid in the damping flow passage. The invention can lift the movement stroke in the effective space, thereby effectively absorbing the amplitude impact, stabilizing the vehicle body faster and improving the riding quality of the user.

Inventors

  • XING BIN
  • TAO JIANBO
  • LI JIAN
  • CHEN RUIGUO
  • JI ZHUTONG

Assignees

  • 索恩格汽车电动系统有限公司

Dates

Publication Date
20260505
Application Date
20260312

Claims (10)

  1. 1. A magnetorheological vibration damping device, comprising: A fixed cylinder barrel (11), wherein the fixed cylinder barrel (11) is used for connecting a frame; The screw rod (12), the screw rod (12) is rotationally connected with the fixed cylinder barrel (11), a nut seat (16) is rotationally arranged on the screw rod (12), and the screw rod (12) is in transmission connection with a driver (21); The movable cylinder barrel (13), the movable cylinder barrel (13) comprises an outer barrel (131) and an inner barrel (132), the outer barrel (131) is sleeved outside the inner barrel (132), the end part of the outer barrel (131) is connected with the end part of the inner barrel (132), the fixed cylinder barrel (11) is inserted between the outer barrel (131) and the inner barrel (132), the fixed cylinder barrel (11) is attached to the outer barrel (131), the inner barrel (132) is connected with the nut seat (16), the inner barrel (132) is provided with a fixed end (1321), the fixed end (1321) is attached to the fixed cylinder barrel (11), the inner barrel (132) and the outer barrel (131) are limited to form a liquid chamber (17), and the liquid chamber (17) is used for filling magnetorheological fluid; The piston (14) is arranged on the fixed cylinder barrel (11), the inner wall of the piston (14) is in sliding fit with the inner barrel (132), the piston (14) separates the liquid chamber (17) to form a first chamber (171) and a second chamber (172), a damping flow passage (141) is arranged in the piston (14), and the damping flow passage (141) is communicated with the first chamber (171) and the second chamber (172); And the exciting coil (15) is wound on the piston (14), and the exciting coil (15) is used for adjusting the viscosity of magnetorheological fluid in the damping flow passage (141).
  2. 2. The magnetorheological vibration damping device according to claim 1, wherein the fixed cylinder (11) has a mounting portion (113) and a limiting portion (114), the mounting plate and the limiting portion (114) are sequentially disposed along the axial direction of the screw (12) toward the fixed end (1321), the piston (14) is mounted on the mounting portion (113), and the piston (14) abuts against the limiting portion (114) to limit the movement of the piston (14) toward the fixed end (1321).
  3. 3. The magnetorheological vibration damping device according to claim 2, wherein the limiting part (114) and the mounting part (113) are provided in an L shape, and the limiting part (114) is provided with a communication flow passage (1141) communicated with the damping flow passage (141).
  4. 4. The magnetorheological damping device according to claim 3, further comprising a sliding sleeve (117), wherein the sliding sleeve (117) is disposed on the inner wall of the limiting portion (114), and the sliding sleeve (117) is sleeved on the inner cylinder (132).
  5. 5. The magnetorheological damping device according to claim 1, further comprising a plurality of sealing members (18), wherein the plurality of sealing members (18) are respectively disposed at the joint of the piston (14) and the inner cylinder (132) and the joint of the fixed cylinder (11) and the outer cylinder (131).
  6. 6. The magnetorheological vibration damping device according to claim 1, further comprising a spacer plug (118), wherein the spacer plug (118) is sleeved on the outer side of the inner cylinder (132), the outer side of the spacer plug (118) is attached to the fixed cylinder, and the spacer plug (118) is located between the fixed end (1321) and the piston (14).
  7. 7. The magnetorheological damping device according to claim 1, further comprising a floating plug (133), wherein the floating plug (133) is sleeved on the inner cylinder (132), and wherein the outer side of the floating plug (133) is attached to the outer cylinder (131), wherein the inner cylinder (132) has a closed end (1322) connected to the outer cylinder (131), wherein a gas chamber (134) is defined between the floating plug (133) and the closed end (1322), and wherein the gas chamber (134) is filled with compressed gas.
  8. 8. The magnetorheological damping device according to claim 1, further comprising an elastic member (19), wherein two ends of the elastic member (19) are respectively connected with the fixed cylinder (11) and the outer cylinder (131); And/or, further comprise a speed reducer (211), wherein the speed reducer (211) is arranged between the lead screw (12) and the driver (21) in a transmission way.
  9. 9. A suspension system comprising a magnetorheological vibration damping device according to any one of claims 1 to 8.
  10. 10. An automobile comprising the suspension system of claim 9.

Description

Magnetorheological vibration damping device, suspension system and automobile Technical Field The invention relates to the technical field of vibration absorbers, in particular to a magnetorheological vibration damping device, a suspension system and an automobile. Background The automobile suspension system is used as a key component for connecting the automobile body and wheels, and can buffer road surface impact and inhibit vibration of the automobile body, so that a comfortable and stable riding environment is provided for passengers, and good control stability of the automobile under various road conditions is ensured. In the related art, the space for installing the vibration damper is relatively fixed and limited in the design process of the automobile chassis, so that the adjustable stroke of the vibration damper is limited, and the performance improvement of the vibration damper is seriously affected. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a magnetorheological vibration damping device, a suspension system and an automobile, wherein the magnetorheological vibration damping device can lift a movement stroke in an effective space, so that amplitude impact can be effectively absorbed, aftershock of an automobile body can be effectively restrained, the automobile body can be more quickly stabilized compared with a short-stroke shock absorber, repeated shaking is avoided, and riding quality of a user is improved. The magnetorheological vibration damping device provided by the invention comprises: the fixed cylinder barrel is used for connecting the frame; the screw rod is rotationally connected with the fixed cylinder barrel, a nut seat is rotationally arranged on the screw rod, and a driver is connected with the screw rod in a transmission way; The movable cylinder comprises an outer cylinder and an inner cylinder, wherein the outer cylinder is sleeved outside the inner cylinder, the end part of the outer cylinder is connected with the end part of the inner cylinder, the fixed cylinder is inserted between the outer cylinder and the inner cylinder, the fixed cylinder is attached to the outer cylinder, the inner cylinder is connected with the nut seat, the inner cylinder is provided with a fixed end, the fixed end is attached to the fixed cylinder, so that the fixed cylinder, the inner cylinder and the outer cylinder define a liquid chamber, and the liquid chamber is used for filling magnetorheological fluid; The piston is arranged in the fixed cylinder barrel, the inner wall of the piston is in sliding fit with the inner barrel, the piston separates the liquid chamber into a first chamber and a second chamber, a damping flow passage is arranged in the piston, and the damping flow passage is communicated with the first chamber and the second chamber; and the exciting coil is wound on the piston and is used for adjusting the viscosity of magnetorheological fluid in the damping flow channel. In summary, the magnetorheological vibration damping device provided by the invention can be nested layer by layer through the screw rod, the fixed cylinder barrel and the movable cylinder barrel, so that the movement stroke can be lifted in the effective space, the amplitude impact can be effectively absorbed, the aftershock of the vehicle body can be effectively restrained, the vehicle body can be more quickly stabilized compared with a short-stroke vibration damper, repeated shaking is avoided, and the riding texture of a user is promoted. In some embodiments, the fixed cylinder has a mounting portion and a limiting portion, the mounting plate and the limiting portion are sequentially disposed along an axial direction of the screw toward the fixed end, the piston is mounted on the mounting portion, and the piston abuts against the limiting portion to limit the piston to move toward the fixed end. In some embodiments, the limiting portion and the mounting portion are L-shaped, and the limiting portion is provided with a communication flow passage that communicates with the damping flow passage. In some embodiments, the magnetorheological damping device further includes a sliding sleeve, the sliding sleeve is sleeved on the inner wall of the limiting portion, and the sliding sleeve is sleeved on the inner cylinder. In some embodiments, the magnetorheological damping device further comprises a plurality of sealing elements, and the plurality of sealing elements are respectively arranged at the joint of the piston and the inner cylinder and the joint of the fixed cylinder barrel and the outer cylinder. In some embodiments, the magnetorheological vibration damping device further comprises a spacer plug, the spacer plug is sleeved on the outer side of the inner cylinder, the outer side of the spacer plug is attached to the fixed cylinder, and the spacer plug is located between t