KUNST
SCHÖNHEIT & WELLNESS
HANDWERK
KULTUR & GESCHICHTE
UNTERHALTUNG
UMFELD
ESSEN & GETRÄNKE
REVERSE ENGINEERING
WISSENSCHAFTEN
SPORT
TECHNOLOGIE
WEARABLES
The MacPherson Strut: The Damper Is the Upper Link
Independent front suspension usually needs two wishbones per wheel, a spring and a damper. Earle S. MacPherson, an engineer at General Motors and then Ford, combined the damper, the spring and the upper link into one telescopic strut running from the hub up to the body, with a single lower link at the bottom. His patent was filed in 1947 and granted in 1953.
It is cheap, light and compact, and it leaves room across the car for the engine — which is why most small front-wheel-drive cars use it.
This rung computes how the wheel's camber changes as the suspension moves, and builds a cardboard front-view model to measure it with a protractor.
Fortgeschritten
About 3 hours
Anweisungen
1
1
Read MacPherson's patent
Read MacPherson's patent
US 2,624,592, 'Vehicle Wheel Suspension System', Earle S. MacPherson of Detroit, filed 21 March 1947 (Serial 736,262), granted 6 January 1953. The wheel's stub axle is connected *"to the body by a vertical telescopic strut"* and *"by a pair of horizontal swinging links"*; one link is *"formed as a turnbuckle"* for adjustment, and rubber bushes give *"a certain degree of universal joint action"*. The figures include a section of the strut's shock-absorber valving.
2
2
Camber change over the travel
Camber change over the travel
Jupyter-Notebook wird geladen …
3
3
Build a front-view model
Build a front-view model
On a sheet of plywood, mark the car's centre line and 'ground'. Use the notebook's dimensions at half scale. Pin a strip of balsa as the lower link at its inner pivot. Make the strut from two cardboard tubes, one sliding in the other, pinned at the top mount and at the link's outer end. Glue a cardboard 'wheel' rigidly to the lower tube.
Move the link end up and down in 20 mm steps and measure the wheel's lean with the protractor. Compare with the notebook. Then move the inner pivot up by 20 mm and repeat: the camber curve changes — this is how suspension designers tune it.
Materialien für diesen Schritt:
Sperrholzplatte1 Blatt
Balsaholzplatte1 Blatt
Papprohr2 Stück
Maschinenschrauben4 StückBenötigte Werkzeuge:
Winkelmesser
Lineal
Akkubohrschrauber
Bohrersatz4
4
History and context
History and context
**US 2,624,592, 'Vehicle Wheel Suspension System', Earle S. MacPherson; filed 21 March 1947, granted 6 January 1953.** The design first went into production on Ford of Britain cars in the early 1950s and became the most common front suspension on small cars.
**Honest limits.** The camber change and roll behaviour are harder to tune than with two wishbones; the strut's sliding seal carries side loads and wears; and the tall strut sets the height of the bonnet line.
Materialien
4- 1 BlattPlatzhalter
- 1 BlattPlatzhalter
- 2 StückPlatzhalter
- 4 StückPlatzhalter
Benötigte Werkzeuge
4- Platzhalter
- Platzhalter
- 1 vendor sell this, none ship to you yetPlatzhalter
- Platzhalter
Verwandte Blueprints
Diese Blueprints teilen Wissen — Techniken, Materialien oder Prinzipien
The Hydraulic Shock Absorber: Liquid Forced Through a Small Passage
von Emma
Mechanik
4
0
0
0
0
0
Ackermann Steering: The Inner Wheel Turns Further
von Martin
Mechanik
7
0
0
0
0
0
The Leaf Spring: A Beam That Carries the Load and Locates the Axle
von Emma
Mechanik
11
0
0
0
0
0
Constant-Velocity Joint
von Emma
Mechanik
59
0
0
0
0
0
Universal Joint
von Martin
HANDWERK
50
0
0
0
0
0
CC0 Gemeinfrei
Dieser Blueprint ist unter CC0 veröffentlicht. Sie dürfen dieses Werk für jeden Zweck frei kopieren, ändern, verbreiten und verwenden, ohne um Erlaubnis zu fragen.
Unterstützen Sie den Maker, indem Sie Produkte über seinen Blueprint kaufen, wo er eine Maker-Provision von Anbietern festgelegt, verdient. Oder erstellen Sie eine neue Iteration dieses Blueprints und verbinden Sie ihn in Ihrem eigenen Blueprint, um Einnahmen zu teilen.