CN216951446U

CN216951446U - Rotary shear type magnetorheological damper

Info

Publication number: CN216951446U
Application number: CN202220416282.3U
Authority: CN
Inventors: 张策淇; 姚嘉凌
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-12
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a rotary shearing type magnetorheological damper which comprises a connecting end cover, a screw, a thrust ball bearing, a screw baffle plate, a ball screw, an inner cylinder, an outer cylinder, a nut seat, a screw nut, a bolt, a buffer block, a working cylinder sealing cover, a magnetism isolating cylinder a, a coil a, a magnetism isolating sheet a, a magnetic core a, a T-shaped rotor, a lifting lug, a through hole a, a magnetism isolating cylinder b, a magnetorheological fluid gap, a magnetic core b, a magnetism isolating sheet b, a coil b, a through hole b, a deep groove ball bearing, a stator, a T-shaped rotor and a ball screw thin end are welded together, the screw baffle plate and the upper end of the ball screw are welded together, the lower end of the inner cylinder and the screw nut are connected together through the bolt, and the upper end of the inner cylinder and the connecting end cover are connected together through the screw. According to the utility model, the T-shaped rotor, the ball screw and the screw nut are combined, and the stator, the magnetic core, the T-shaped rotor and the like form the T-shaped ring magnetorheological fluid gap, so that the vertical motion of an automobile can be converted into the rotary motion of the rotor to shear oil in the magnetorheological fluid gap, large damping can be realized by small current, the stress of a working area is uniform, and the safety and the stability of automobile driving are improved.

Description

Rotary shear type magnetorheological damper

Technical Field

The utility model relates to the field of automobile parts, in particular to a rotary shearing type magnetorheological damper.

Background

The automobile suspension is an extremely important part of an automobile and plays an important role in the driving process of the automobile. In ordinary use, under the influence of other factors such as road conditions, vibration and noise generated during automobile driving influence passengers and drivers. At present, the automobile damper mostly adopts a spring hydraulic type, although the advantages are multiple, the defects are obvious, the volume of required fluid is large, the weight is increased, a few novel electromagnetic dampers exist, but the magnetic field distribution is not uniform, the volume of oil liquid is too large, the volume of a coil winding is too large, and the heat dissipation problem exists.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of providing a rotary shear type magnetorheological damper, which can improve the utilization rate of a magnetic field, realize large damping with low current, and improve the driving comfort of an automobile due to uniform distribution of the magnetic field.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the rotary shearing type magnetorheological damper is characterized by comprising a connecting end cover, a screw, a thrust ball bearing, a screw baffle plate, a ball screw, an inner cylinder, an outer cylinder, a nut seat, a screw nut, a bolt, a buffer block, a working cylinder sealing cover, a magnetism isolating cylinder a, a coil a, a magnetism isolating sheet a, a magnetic core a, a T-shaped rotor, a lifting lug, a through hole a, a magnetism isolating cylinder b, a magnetorheological fluid gap, a magnetic core b, a magnetism isolating sheet b, a coil b, a through hole b, a deep groove ball bearing, a stator, a T-shaped rotor and a ball screw thin end are welded together, the screw baffle plate and the upper end of the ball screw are welded together, the lower end of the inner cylinder and the screw nut are connected together through the bolt, and the upper end of the inner cylinder and the connecting end cover are connected together through the screw.

Furthermore, the magnetism isolating sheet a (15), the magnetism isolating sheet b (23), the magnetism isolating cylinder a (13) and the magnetism isolating cylinder b (20) are made of aluminum.

Furthermore, the T-shaped rotor (17) adopts a cylindrical rotor with a longitudinal section of a left-right symmetrical T shape.

Further, the windings of the coils a (14) and b (24) are arranged in a mode that the shortest side of the magnetorheological fluid gap (21) is arranged.

The beneficial effect of adopting above technical scheme is:

1. according to the utility model, the combination of the ball screw and the rotor can convert the vertical motion of automobile vibration into the rotary motion of the rotor, so that large-area shearing magnetorheological fluid is realized, and the utilization rate of a magnetic field is increased.

2. According to the utility model, the arrangement position of the coil winding can realize that the coil winding has fewer turns and the same current, and can generate larger magnetic field intensity compared with other coil winding arrangement positions, and the magnetic field distribution is relatively uniform.

3. According to the utility model, the arrangement positions of the magnetism isolating sheet and the magnetism isolating cylinder can realize effective control on the excitation magnetic field, and the phenomenon that the magnetic field runs off through the magnetic conduction material is avoided.

Drawings

FIG. 1 is a schematic view of a rotary shear type magnetorheological damper of the present invention;

FIG. 2 is an enlarged view of a portion of a rotary shear type magnetorheological damper working cylinder of the present invention;

in the figure:

1-connecting end cover, 2-screw, 3-thrust ball bearing, 4-screw baffle, 5-ball screw, 6-inner cylinder, 7-outer cylinder, 8-nut seat, 9-screw nut, 10-bolt, 11-buffer block, 12-working cylinder cover, 13-magnetism isolating cylinder a, 14-coil a, 15-magnetism isolating sheet a, 16-magnetic core a, 17-T type rotor, 18-lifting lug, 19-through hole a, 20-magnetism isolating cylinder b, 21-magnetic rheological fluid gap, 22-magnetic core b, 23-magnetism isolating sheet b, 24-coil b, 25-through hole b, 26-deep groove ball bearing and 27-stator.

Detailed Description

A further embodiment of the rotary shear type magnetorheological damper of the present invention is described below with reference to the accompanying drawings.

Example (b):

as shown in figures 1-2

1. The utility model provides a rotary shearing type magnetorheological damper which comprises a connecting end cover 1, a screw 2, a thrust ball bearing 3, a screw baffle plate 4, a ball screw 5, an inner cylinder 6, an outer cylinder 7, a nut seat 8, a screw nut 9, a bolt 10, a buffer block 11, a working cylinder cover 12, a magnetism isolating cylinder a13, a coil a14, a magnetism isolating sheet a15, a magnetic core a16, a T-shaped rotor 17, a lifting lug 18, a through hole a19, a magnetism isolating cylinder b20, a magnetorheological fluid gap 21, a magnetic core b22, a magnetism isolating sheet b23, a coil b24, a through hole b25, a deep groove ball bearing 26, a stator 27 and a T-shaped rotor 17, wherein the thin end of the ball screw 5 is welded together, the screw baffle plate 4 is welded together with the upper end of the ball screw 5, the lower end of the inner cylinder 6 is connected together with the screw nut 9 through the bolt 10, and the upper end of the inner cylinder 6 is connected together with the connecting end cover 1 through the screw 2.

In the above embodiment, specifically, the magnetism isolating sheet a (15), the magnetism isolating sheet b (23), the magnetism isolating cylinder a (13), and the magnetism isolating cylinder b (20) are made of aluminum.

In the above embodiment, specifically, the T-shaped rotor (17) is a cylindrical rotor with a bilaterally symmetric T-shaped cross section.

In the above embodiment, specifically, the windings of the coils a (14) and b (24) are arranged in such a manner that the shortest side of the magnetorheological fluid gap (21) is arranged.

The working principle is as follows:

the working principle of the utility model is as follows: when the magnetorheological fluid damper is used, under the structural arrangement shown in the figure 1-2, the upper end of the inner cylinder is connected with a vehicle body through the connecting end, the outer cylinder is connected with a wheel bracket through the lifting lug, when an automobile runs on an uneven road surface, the vehicle body vertically moves at a certain distance relative to a tire to further drive the inner cylinder to move up and down, the inner cylinder drives the ball screw to rotate through the screw nut connected with the inner cylinder through the bolt, so that the T-shaped rotor welded with the inner cylinder is driven to rotate, magnetorheological fluid in a magnetorheological fluid gap is cut to generate damping force, a coil a14 and a coil b24 of the inner cylinder are respectively connected with a control device through a through hole a19 and a through hole b25, and the current with the same size and opposite positive and negative polarities is conducted, so that a larger magnetic field intensity is generated.

The above are only further embodiments of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.

Claims

1. A rotary shearing type magnetorheological damper is characterized by comprising a connecting end cover (1), a screw (2), a thrust ball bearing (3), a screw baffle (4), a ball screw (5), an inner cylinder (6), an outer cylinder (7), a nut seat (8), a screw nut (9), a bolt (10), a buffer block (11), a working cylinder cover (12), a magnetism isolating cylinder a (13), a coil a (14), a magnetism isolating plate a (15), a magnetic core a (16), a T-shaped rotor (17), a lifting lug (18), a through hole a (19), a magnetism isolating cylinder b (20), a magnetorheological fluid gap (21), a magnetic core b (22), a magnetism isolating plate b (23), a coil b (24), a through hole b (25), a deep groove (26), a stator (27), a T-shaped ball bearing rotor (17) and the thin end of the ball screw (5) are welded together, the upper ends of the screw baffle (4) and the ball screw (5) are welded together, the lower end of the inner cylinder (6) is connected with the screw nut (9) through a bolt (10), and the upper end of the inner cylinder (6) is connected with the connecting end cover (1) through a screw (2).

2. The rotary shear type magnetorheological damper according to claim 1, wherein the magnetism isolating sheet a (15), the magnetism isolating sheet b (23), the magnetism isolating cylinder a (13) and the magnetism isolating cylinder b (20) are made of aluminum.

3. The rotary shear type magnetorheological damper according to claim 1, wherein the T-shaped rotor (17) is a cylindrical rotor with a left-right symmetrical T-shaped longitudinal section.

4. The rotary shear type magnetorheological damper according to claim 1, wherein the coils a (14) and b (24) are wound in an arrangement on the shortest side of the magnetorheological fluid gap (21).