Magnetorheological fluid automobile bumper

A magnetorheological fluid automobile bumper, comprising a rear bumper body (2), wherein two front bumper bodies (1) are symmetrically hinged to a front side of the rear bumper body (2) that faces toward the two front bumper bodies (1), ends of the two front bumper bodies that are opposite to hinged ends of the two front bumper bodies (1) are joined together, a connecting rod (3) is jointly installed between one of the two front bumper bodies (1) and the rear bumper body (2), one end of the connecting rod (3) is hinged to the one of the two front bumper bodies (1), and an 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 a rear side of the rear bumper body (2) that faces away from the two front bumper bodies (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 an end of the outer sleeve (7) closest to the rear bumper body, 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), each of two ends of the inner sleeve (9) is slidably provided with one of two extrusion blocks (10), the two extrusion blocks (10) are symmetrically arranged at the two ends of the inner sleeve (9), sides of the extrusion blocks that face away from each other are provided with push blocks (11), an other end of the push rod (6) located away from the rear bumper body (2), 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 an other end of the outer sleeve farthest from the rear bumper body is provided with second springs (12), the second springs (12) are installed with an other one of the push blocks (11), the inner sleeve (9) is filled with a magnetorheological fluid, fluid outlets are formed in the inner sleeve (9), buffer blocks (13) are slidably arranged in the fluid outlets, respectively, a third spring (14) is arranged in the inner sleeve (9), the buffer blocks (13) are installed with the third spring (14), and the buffer blocks (13) are in frictional contact with the inner wall of the outer sleeve (7).