The New shock absorbers

By: Steve Manik

A rigid motorcycle frame has a pair of spaced swingarms joined to a shock absorber that has a shock absorber casing pivotally mounted on the swingarms and has a shock absorber rod which is pivotally joined to the motorcycle at a point below the housing whereby the movement of the back wheel of the motorcycle makes the outer housing of the shock absorber to go upward relative to shock absorber rod which is fixed to the motorcycle frame and which is opposite from the normal operation of shock absorber. The shock absorber includes a spring means and/or hydraulic means to give the normal resistance given by a cushioning arrangement. In function the swing arms are moving downward, the shock absorber moves its mounting points closer together which is different from most shock absorbers who move their mounting points more apart.

Majority of the motorcycles in use these days utilize a swingarm to locate the back wheel relative to the motorcycle frame. The forward end of the swingarm; pivots around a bolt running crosswise through the motorcycle frame or through brackets attached to the motorcycle frame to let the back wheel move when it encounters a bump. The weight of the vehicle is supported by either one or two shock absorbers, which have a spring (mechanical or gas) and a way of damping movement.

Still there are motorcycles designs with two shock absorbers, with one shock absorber located on either side of the back wheel and extending upward from the swingarm to the rearward position of the frame. Recently, a large number of motorcycles utilizing only one shock absorber have given much better suspension performance. In these designs the shock absorber is located forward of the wheel and extends from the area of swingarm upward to an area under forward portion of the seat.

In most case the performances benefits of single shock absorber are achieved by utilizing the mechanical links at top, the both, or bottom, which transmit the forces between these designs, either the upper end of shock absorber and/or linkage and brackets utilize space which would otherwise be utilized for an air filter box, a battery or some other purpose.

The present process is utilized on a motorcycle lock suspension and uses a shock absorber mounted on a swingarm which has a pair of spaced swingarm members. The piston rod of the shock absorber is fixed to a pivot on the lower end of the motorcycle frame and the housing or cylinder for the piston is attached to the swingarms. The shock pivots around a crosswise axis on the frame. The shock absorber tries to pull its mounting points closer together which is separate from most shock absorbers who try to push their mounting points further apart. Thus in the operation of devise when the back wheel is driven upward with the swingarms, the shock absorber piston rod travel downwardly in the casing, as the casing travels up with the swingarm.


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