MacPherson strut

  • Journal
  • Damper; lower spring plate
  • Steering tie rod
  • Body, frame or subframe
  • Blue / Purple: Either (Original Patent ): Blue: simple wishbone, violet: one end of the stabilizer bar, or: blue and purple together: wishbone

The MacPherson strut is a construction that is used after the 1949 patented principle by the American Earle S. MacPherson in the chassis of automobiles, but also for aircraft and engines. It is used for vibration mechanical decoupling of eg wheels and the rest of the vehicle. In Europe, it was first used in English Ford Consul, which was presented at the London Motor Show in October 1950.

Features

A MacPherson strut is a complete suspension system together with the control arm, thrust strut / stabilizer and the track rod. The strut consists essentially of spring, shock absorbers and steering knuckle.

For simple embodiments, not only the lower spring plate, but the kingpin is welded to the cylinder of the hydraulic shock absorber. With the strut bolted uprights, however, allow the setting of the fall.

The upper spring seat is mounted in the so-called strut tower in the body, often via a roller bearing. The bearing is necessary so that the spring can rotate the steering relative to the body and is not braced, because when steering the entire strut rotates. The steering knuckle is supported in a ball bearing ( ball-joint ) in the arm.

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