Bi-directional damper with a self-centering mechanism

B - Operations – Transporting – 60 – K

Patent

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Details

B60K 23/00 (2006.01) B60G 11/14 (2006.01) F16F 9/06 (2006.01) F16F 9/18 (2006.01)

Patent

CA 2282359

A self centering, bi-directional, non-cavitating damper that includes a cylindrical damper body (14) and a piston assembly (26) having a piston reciprocally movable in the damper body and a piston rod (28) connected and movable with the piston. A tube (72) is connected with the piston rod and is spaced about and radially from the damper body so that the tube and damper body may move axially, relative to each other, but are normally positioned in centered positions with respect to each other. First and second plastic washers (92 and 94) are positioned between the damper body and the tube. At least one coil compression spring ( 102) is positioned between the damper body and the tube and biases the washers apart axially to their normal positions. Each washer is prevented from moving apart beyond its normal position, but is movable toward the other washer, against the bias of the spring, when relative movement, from their normal positions, occurs between the damper body and the tube.

On décrit un amortisseur concentrique, bidirectionnel, non cavitant, qui inclut un corps de l'amortisseur cylindrique (14) et un ensemble piston (26) muni d'un piston pouvant se déplacer en mouvement inverse dans le corps de l'amortisseur et d'une tige de piston (28) fixée au piston avec lequel elle se déplace. Un tube (72), relié à la tige de piston, est disposé radialement et de manière espacée par rapport au corps de l'amortisseur, si bien que le tube et le corps de l'amortisseur peuvent se déplacer sur le même axe l'un relativement à l'autre, mais sont généralement placés dans des positions centrés l'un par rapport à l'autre. Une première série et une deuxième série de rondelles en plastique (92, 94) sont placées entre le corps de l'amortisseur et le tube. Au moins un ressort de pression en spirale (102) est placé entre le corps de l'amortisseur et le tube et écarte les rondelles axialement vers leur position normale. Chaque rondelle est empêchée de s'écarter au-delà de sa position normale, mais peut se déplacer vers l'autre rondelle, en opposition à la tension du ressort, lorsqu'un mouvement relatif, à partir de leur position normale, intervient entre le corps de l'amortisseur et le tube.

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