Housing for a Motor or Compressor
AssigneeKNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
InventorOlivier HERBIET
Life of this patent
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Abstract
A housing for a motor or compressor has an elongate crankcase with two end surfaces. At least one cylinder chamber is provided in which a piston is caused to perform a movement by rotation of the crankshaft. The internal diameter of the crankcase narrows monotonously from the first end surface to the second end surface. A crankcase shaped in this way can be manufactured particularly easily by virtue of the casting being performed around a shaping mandrel. A shaping mandrel of this type must likewise narrow monotonously in order that, after the casting has been performed around it, the shaping mandrel can be pulled out of the housing at a first end. By way of the shaping of the crankcase, it is possible for the housing to be of unipartite and at the same time very compact construction.
Claims14
A housing for a motor or compressor, comprising:
- an elongate crank chamber, which has two end surfaces, for accommodating a crankshaft;
- and
- at least one cylinder chamber for accommodating a piston which is caused to perform a reciprocating movement by a rotation of the crankshaft, wherein
- the crank chamber has, in a first end surface, an opening through which the crankshaft is insertable into said crank chamber, and
- an inner diameter of the crank chamber narrows monotonously from the first end surface to the second end surface.
A motor or compressor, comprising:
- a crankshaft;
- a housing for the motor or compressor, the housing including an elongate crank chamber that accomodates the crankshaft wherein an inner diameter of the crank chamber narrows monotonously from the first end surface to a second end surface;
- one connecting rod per cylinder chamber, which connecting rod is rotatably mounted by a first connecting-rod eye on the crankshaft and by a second connecting-rod eye on a piston which runs in a cylinder chamber, wherein
- in comparing the two connecting rods mounted along an axis of the crankshaft, an outer diameter of the connecting rod in a region of the first connecting-rod eye and/or an inner diameter of the first connecting-rod eye also narrows with the inner diameter of the crank chamber that narrows monotonously from the first end surface to the second end surface.
A method for producing a housing, the method comprising the acts of:
- manufacturing an elongated crank chamber having two end surfaces, the crank chamber being configured to accommodate a crankshaft, wherein the first end surface of a crank chamber has an opening to which the crankshaft is insertable and wherein an inner diameter of the crank chamber narrows monotonously from the first end surface to the second end surface;
- wherein the manufacturing of the crank chamber is carried out by casting housing material around an elongate shaping madrel having two ends, an outer diameter of the elongate shaping mandrel narrowing monotously from a first end to the second end.
Dependencies are inferred from the claim text.