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Multi-ratio gearbox housing

  • US 9,784,359 B2
  • Filed: 08/15/2011
  • Issued: 10/10/2017
  • Est. Priority Date: 08/15/2011
  • Status: Active Grant
First Claim
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1. A multi-ratio gearbox housing for a vehicle, comprising:

  • a housing, the housing being made of light metal material,a first bearing seat having a cylindrical inner surface,a reinforcement member having a first cylindrical inner surface surrounding the first bearing seat for reducing thermal radial expansion of the first bearing seat, wherein the reinforcement member being of a material the coefficient of thermal expansion of which is less than the coefficient of thermal expansion of the light metal material of the housing,the reinforcing member being a cast-in insert arranged in the housing, wherein a radial distance between the first cylindrical inner surface and the cylindrical inner surface of the first bearing seat is substantially constant along circumferential lines of the first bearing seat,wherein the housing comprises a first wall that extends substantially perpendicular to a first axis of the first bearing seat, wherein the first bearing seat is arranged in the first wall, and wherein the reinforcing member is cast-in into the first wall of the housing, wherein a cross-section of the reinforcement member in at least one of an axial plane of the first cylindrical inner surface has a height/width-ratio of at least 2;

    1, wherein the reinforcement member is substantially completely embedded within the first wall, and wherein a height/width ratio of a straight wall portion of the first wall in which the reinforcement member is embedded and radially outside of the reinforcement member is at least 2;

    1.

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