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A bushing is a type of bearing that is used in the suspension system of a vehicle. It is typically used to connect moving parts such as control arms and sway bars to the frame of the vehicle, and also to isolate these parts from each other and from the frame.
In some modern cars, flexibility is mainly in rubber bushings, which are subject to decay over time. For high-stress suspensions, such as off-road vehicles, polyurethane bushings are available, which offer more longevity under greater stresses. However, due to weight and cost considerations, structures are not made more rigid than necessary.
In racing cars, bushings tend to be made of harder materials for good handling such as brass or delrin. In Passenger cars, bushings tend to be made of softer material for added comfort. In general physical terms, the mass and mechanical hysteresis (damping effect) of solid parts should be accounted for in a dynamic analysis, as well as their ...
Consequently, they react to loads along their own length, in tension and compression, but not in bending. Some multi-links do use a trailing arm, control arm or wishbone, which has two bushings at one end. On a front suspension one of the lateral arms is replaced by the tie-rod, which connects the rack or steering box to the wheel hub.
Ackermann steering linkage Idler arm for a heavy-duty truck. An idler arm is a pivoting support for a conventional parallelogram steering linkage on some cars and trucks. [1] The idler arm supports the end of the center link on the passenger's side of the vehicle. The idler arm bolts to the vehicle's frame or subframe.
An anti-roll bar (in black) on the rear of a Porsche, which traverses the underside of the car.Flexible bushings attach it to the chassis. Also visible on the right is one of the links that connect the bar to the suspension (drop link).
Although not deliberately free to move, the single bushing does not control the arm from moving back and forth; this motion is constrained by a separate link or radius rod. [2] This is in contrast to the wishbone, which are triangular and have two widely spaced inboard bearings. These constrain the outboard end of the wishbone from moving back ...
When bolted, it often includes rubber bushings or springs to dampen vibrations. [1] [2] [3] The primary purposes of using a subframe are to distribute high chassis loads over a wide area of relatively thin sheet metal of a monocoque body shell and to isolate vibrations and harshness from the rest of the body.
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