MAGNETORHEOLOGICAL FLUID AUTOMOBILE BUMPER

Abstract

Disclosed is a magnetorheological fluid automobile bumper, and belongs to the field of automobile bumpers. The magnetorheological fluid automobile bumper comprises a rear bumper body, wherein two front bumper bodies are symmetrically hinged to the front side of the rear bumper body, the ends, close to each other, of the two front bumper bodies are in butt joint with each other, a connecting rod is jointly installed between the front bumper body and the rear bumper body, one end of the connecting rod is hinged to the front bumper body, and the other end of the connecting rod is slidably installed with the rear bumper body; and a plurality of magnetorheological fluid buffers are installed on the rear side of the rear bumper body.

Claims

1. A magnetorheological fluid automobile bumper, comprising a rear bumper body (2), wherein two front bumper bodies (1) are symmetrically hinged to the front side of the rear bumper body (2), the ends, close to each other, of the two front bumper bodies (1) are in butt joint with each other, a connecting rod (3) is jointly installed between the front bumper body (1) and the rear bumper body (2), one end of the connecting rod (3) is hinged to the front bumper body (1), and the other end of the connecting rod (3) is slidably installed with the rear bumper body (2); and a plurality of magnetorheological fluid buffers are installed on the rear side of the rear bumper body (2).

2. The magnetorheological fluid automobile bumper according to claim 1, wherein the magnetorheological fluid buffer comprises an outer sleeve (7), a magnet (8) is installed on the outer side of the outer sleeve (7), a push rod (6) is slidably arranged at the front end of the outer sleeve (7), one end of the push rod (6) is installed with the rear bumper body (2), an inner sleeve (9) is movably arranged inside the outer sleeve (7), two extrusion blocks (10) are symmetrically and slidably arranged at the two ends of the inner sleeve (9), the ends, away from each other, of the two extrusion blocks (10) are provided with push blocks (11), the end, away from the rear bumper body (2), of the push rod (6) extends into the outer sleeve (7) and is installed with one of the push blocks (11), the inner wall of the outer sleeve (7) at the end away from the push rod (6) is provided with second springs (12), the second springs (12) are installed with the other push block (11), the inner sleeve (9) is filled with a magnetorheological fluid, a fluid outlet is formed in the inner sleeve (9), a buffer block (13) is slidably arranged in the fluid outlet, a third spring (14) is arranged in the inner sleeve (9), the buffer block (13) is installed with the third spring (14), and the buffer block (13) is in frictional contact with the inner wall of the outer sleeve (7).

3. The magnetorheological fluid automobile bumper according to claim 2, wherein a sliding chute is formed in the side, close to the front bumper bodies (1), of the rear bumper body (2), a sliding seat (4) is slidably arranged in the sliding chute, the end, away from the front bumper bodies (1), of the connecting rod (3) is hinged with the sliding seat (4), a first spring (5) is installed in the sliding chute, one end of the first spring (5) is connected with the sliding seat (4), and the other end of the first spring (5) is fixed with the tail end of the sliding chute.

4. The magnetorheological fluid automobile bumper according to claim 3, wherein the extrusion block (10) is of a T-shaped structure, one end of the extrusion block (10) is slidably arranged inside the inner sleeve (9), and the other end of the extrusion block (10) is fixed with the push block (11), and the end, positioned inside the inner sleeve (9), of the extrusion block (10) is provided with a sealing strip.

5. The magnetorheological fluid automobile bumper according to claim 4, wherein two fluid outlets are symmetrically formed in the inner sleeve (9), buffer blocks (13) are slidably arranged in the two fluid outlets, a sealing strip is arranged between the buffer block (13) and the fluid outlet, and the two ends of the third spring (14) are fixedly installed with the two buffer blocks (13), respectively.

6. The magnetorheological fluid automobile bumper according to claim 5, wherein the end of the buffer block (13) is provided with anti-skid convex teeth, and the anti-skid convex teeth are in frictional contact with the inner wall of the outer sleeve (7).

7. The magnetorheological fluid automobile bumper according to claim 6, wherein anti-skid concave ring grooves matched with the anti-skid convex teeth are formed in the inner wall of the outer sleeve (7).

8. The magnetorheological fluid automobile bumper according to claim 7, wherein the two front bumper bodies (1) are hinged with the end of the rear bumper body (2) through hinged seats, and the end, close to the front bumper bodies (1), of the connecting rod (3) is hinged with the inner sides of the front bumper bodies (1) through hinged seats.

9. The magnetorheological fluid automobile bumper according to claim 8, wherein the two front bumper bodies (1) jointly form an arc-shaped bar.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The attached figures serve to provide further understanding of the present disclosure and constitute a part of the specification, together with embodiments of the present disclosure, serve to explain the present disclosure and do not constitute limitation of the present disclosure.

[0025] FIG. 1 is a front schematic diagram of a magnetorheological fluid automobile bumper proposed by the present disclosure;

[0026] FIG. 2 is a rear schematic diagram of a magnetorheological fluid automobile bumper proposed by the present disclosure;

[0027] FIG. 3 is an overall schematic diagram of a magnetorheological fluid buffer in the present disclosure;

[0028] FIG. 4 is an internal section view of an outer sleeve;

[0029] FIG. 5 is an internal section view of an inner sleeve;

[0030] FIG. 6 is a state schematic diagram of an extrusion block inside the inner sleeve when the bumper is not stressed;

[0031] FIG. 7 is a state schematic diagram of an extrusion block inside the inner sleeve when the bumper is stressed; and

[0032] FIG. 8 is a structural enlarged view of the part a in FIG. 2.

[0033] Reference signs: 1, front bumper body; 2, rear bumper body; 3, connecting rod; 4, sliding seat; 5, first spring; 6, push rod; 7, outer sleeve; 8, magnet; 9, inner sleeve; 10, extrusion block; 11, push block; 12, second spring; 13, buffer block; and 14, third spring.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the attached figures in the embodiments of the present disclosure.

[0035] Referring to FIG. 1 to FIG. 8, a magnetorheological fluid automobile bumper includes a rear bumper body 2. Two front bumper bodies 1 are symmetrically hinged to the front side of the rear bumper body 2, and the ends, close to each other, of the two front bumper bodies 1 are in butt joint with each other. The two front bumper bodies 1 jointly form an arc-shaped bar. A connecting rod 3 is jointly installed between the front bumper body 1 and the rear bumper body 2. One end of the connecting rod 3 is hinged to the front bumper body 1, and the other end of the connecting rod 3 is slidably installed with the rear bumper body 2. The two front bumper bodies 1 are hinged with the end of the rear bumper body 2 through hinged seats, and the end, close to the front bumper bodies 1, of the connecting rod 3 is hinged with the inner sides of the front bumper bodies 1 through hinged seats.

[0036] A sliding chute is formed in the side, close to the front bumper bodies 1, of the rear bumper body 2. A sliding seat 4 is slidably arranged in the sliding chute. The end, away from the front bumper bodies 1, of the connecting rod 3 is hinged with the sliding seat 4. A first spring 5 is installed in the sliding chute. One end of the first spring 5 is connected with the sliding seat 4, and the other end of the first spring 5 is fixed with the tail end of the sliding chute.

[0037] After the bumper of a vehicle is collided, the impact force of the bumper firstly acts on the front bumper bodies 1. At this time, the front bumper bodies 1 are stressed and the impact force is transmitted to the rear bumper body 2 through the connecting rods 3. The sliding seats 4 and the first springs 5 on the rear bumper body 2 are used for realizing the first buffering and damping effect on the impact force transmitted by the front bumper bodies 1 and the connecting rods 3.

[0038] A plurality of magnetorheological fluid buffers are installed on the rear side of the rear bumper body 2.While the first springs 5 realizes the first buffering and damping effect on the impact force transmitted by the front bumper bodies 1 and the connecting rods 3, the impact force is transmitted to each magnetorheological fluid buffer through the rear bumper body 2. Referring to FIG. 1 and FIG. 2, in the embodiment, three magnetorheological fluid buffers are taken as examples.

[0039] The magnetorheological fluid buffer includes an outer sleeve 7. A magnet 8 is installed on the outer side of the outer sleeve 7. A push rod 6 is slidably arranged at the front end of the outer sleeve 7. One end of the push rod 6 is installed with the rear bumper body 2. An inner sleeve 9 is movably arranged inside the outer sleeve 7. Two extrusion blocks 10 are symmetrically and slidably arranged at the two ends of the inner sleeve 9. The ends, away from each other, of the two extrusion blocks 10 are provided with push blocks 11. The end, away from the rear bumper body 2, of the push rod 6 extends into the outer sleeve 7 and is installed with one of the push blocks 11. The inner wall of the outer sleeve 7 at the end away from the push rod 6 is provided with second springs 12. The second springs 12 are installed with the other push block 11. The inner sleeve 9 is filled with a magnetorheological fluid. A fluid outlet is formed in the inner sleeve 9, and a buffer block 13 is slidably arranged in the fluid outlet. A third spring 14 is arranged in the inner sleeve 9. The buffer block 13 is installed with the third spring 14. The buffer block 13 is in frictional contact with the inner wall of the outer sleeve 7.

[0040] The extrusion block 10 is of a T-shaped structure. One end of the extrusion block 10 is slidably arranged inside the inner sleeve 9, and the other end of the extrusion block 10 is fixed with the push block 11. The end, positioned inside the inner sleeve 9, of the extrusion block 10 is provided with a sealing strip.

[0041] The impact force is firstly transmitted to the push rod 6 through the rear bumper body 2, and then transmitted to the push block 11 and the extrusion block 10 on the front side. At this time, the extrusion block 10 on the front side preliminarily extrudes the magnetorheological fluid inside the inner sleeve 9.

[0042] Two fluid outlets are symmetrically formed in the inner sleeve 9. Buffer blocks 13 are slidably arranged in the two fluid outlets. A sealing strip is arranged between the buffer block 13 and the fluid outlet. The two ends of the third spring 14 are fixedly installed with the two buffer blocks 13, respectively. The third spring 14 is installed with the buffer block 13, and the buffer block 13 is slidably arranged in the fluid outlet. Therefore, in the early stage of impact force transmission, the buffer block 13 does not directly leave the fluid outlet immediately, but transmits the impact force to the extrusion block 10 and the push block 11 on the rear side, and promotes the push block 11 to squeeze the second spring 12, so that the second buffering and damping effect can be realized by the second spring 12. In this process, the inner sleeve 9 and the magnetorheological fluid inside the inner sleeve 9 are displaced inside the outer sleeve 7. That is, the inner sleeve 9 and the magnetorheological fluid inside the inner sleeve 9 gradually approach the magnet 8 and gradually enter the magnetic field range.

[0043] When the impact force continues to be transmitted, the pressure of the magnetorheological fluid inside the inner sleeve 9 is increased, and the buffer block 13 is stressed to stretch the third spring 14 and leave the fluid outlet. At this time, the buffer block 13 forms frictional resistance with the inner wall of the outer sleeve 7, so that the third buffering and damping effect is realized. In addition, the magnetorheological fluid enters the gap between the outer sleeve 7 and the inner sleeve 9 at this time, and enters the magnetic field range of the magnet 8. Under the action of the magnetic field of the magnet 8, the viscosity of the magnetorheological fluid is increased, and the magnetorheological fluid is gradually “solidified”. After the viscosity of the magnetorheological fluid is increased, the resistance with the outer sleeve 7 can be increased, the fluid outlets can also be blocked, so that the frictional resistance between the buffer block 13 and the inner wall of the outer sleeve 7 can be maintained, and the third buffering and damping effect is ensured.

[0044] The end of the buffer block 13 is provided with anti-skid convex teeth, and the anti-skid convex teeth are in frictional contact with the inner wall of the outer sleeve 7. Anti-skid concave ring grooves matched with the anti-skid convex teeth are formed in the inner wall of the outer sleeve 7.

[0045] The anti-skid convex teeth of the buffer block 13 are matched with the anti-skid concave ring grooves on the inner wall of the outer sleeve 7, and the frictional resistance generated by the anti-skid convex teeth and the anti-skid concave ring grooves can effectively buffer the impact force of the bumper.