Disc brake
AssigneeHaldex Brake Products AB
InventorsJoakim Gripemark, Patrik Kall, Goran Stensson
Life of this patent
Estimating the term…
Abstract
A brake disc for a disc brake having one or more sliding or not sliding discs on a hub or other central part is provided. The brake disc has an outer circumference and an inner circumference with a number of alternating teeth and gaps on the inner circumference. One or more measures are taken to reduce the risk of crack formation. One of the measures is to arrange areas of reduced material thickness at and/or adjacent each tooth. The areas of reduced material thickness may be openings having an axial or radial extent. Other measures include designing the teeth and gaps in an appropriate way and forming the brake disc with different properties at different parts.
Claims21
A brake disc to be used as an axially fixed or sliding disc in a disc brake, comprising:
- an outer circumference;
- an inner circumference;
- a number of alternating teeth and gaps along the inner circumference;
- and a means to reduce uneven elongation characteristics of the brake disc, wherein the brake disc has areas of reduced material thickness at each tooth compared with the material thickness at a bottom of each tooth gap, wherein at least some of the areas of the reduced material thickness extend radially outward past an imaginary circle at least partially defined by the bottom of the gaps;
- wherein the bottom of each gap is formed by arc-formed transition parts with adjacent teeth and a substantially straight part between the transition parts;
- wherein each transition part has a radius (R), and wherein a length of each substantially straight part is less than 1.5R.
A brake disc to be used as an axially fixed or sliding disc in a disc brake, comprising:
- an outer circumference;
- an inner circumference;
- a number of alternating teeth and gaps along the inner circumference;
- and a means to reduce uneven elongation characteristics of the brake disc, wherein the brake disc has areas of reduced material thickness at each tooth, compared with the material thickness at a bottom of each tooth gap, wherein at least some of the areas of the reduced material thickness extend radially outward past an imaginary circle at least partially defined by the bottom of the gaps, wherein the material thickness along the outer circumference of the brake disc is constant, wherein the bottom of each gap is formed by arc-formed transition parts with adjacent teeth and a substantially straight part between the transition parts;
- and wherein each transition part has a radius (R), and wherein a length of each substantially straight part is less than 1.5R.
Dependencies are inferred from the claim text.