Brake Caliper Spindle Clamping to Eliminate Axial Play
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Solution Overview
Problem
Existing brake caliper arrangements for disc brakes often produce rattling noises due to axial play in the spindle drive, which is costly to mitigate with fine dimensional tolerances and does not fully address noise reduction.
Innovation Solution
A brake caliper arrangement with a clamping device that eliminates axial play by applying a force F2 to the spindle, ensuring it is mounted play-free, thereby reducing sound emissions and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fine dimensional tolerance is applied in the region of axial fixing to reduce axial play, then sound emissions are reduced, but production costs increase
Solution Approach 1:
A clamping device is introduced as an intermediary component between the spindle and the housing. This clamping device actively eliminates axial play through mechanical clamping action, allowing standard dimensional tolerances to be used while still achieving the goal of reducing sound emissions. The clamping device mediates between the spindle and housing, providing play-free mounting without requiring fine tolerances in the spindle or housing themselves.
2Manufacturing precision
If fine dimensional tolerance is applied in the region of axial fixing, then axial play is reduced, but production complexity increases
Solution Approach 1:
The clamping device serves as a mediator that provides axial play elimination through its clamping mechanism rather than through precise dimensional control of the spindle and housing. This intermediary component absorbs the complexity of achieving play-free mounting, allowing the main spindle and housing to be manufactured with standard tolerances using simpler processes.
3Ease of manufacture
If standard dimensional tolerance is used in axial fixing, then production is simplified, but axial play exists causing rattling noises
Solution Approach 1:
The clamping device is positioned as an intermediary between the spindle and housing that actively compensates for dimensional tolerances. It provides mechanical clamping that eliminates axial play and prevents rattling noises, while allowing the spindle and housing to be manufactured with standard, simpler tolerances. The clamping device thus resolves the conflict between manufacturing simplicity and noise reduction.
Data Source
AI summary
A brake caliper arrangement for a disc brake, and a disc brake for such a brake caliper arrangement is disclosed. The brake caliper arrangement comprises a brake caliper which has a carrier structure and a housing with a cavity, a brake piston which is mounted axially movably in the cavity, and a spindle drive having a spindle which is mounted in the cavity so as to be rotatable relative to the housing. A spindle nut which is axially drivable via the spindle and mounted axially displaceably. The spindle drive can be actuated such that it can be placed in a first actuation state and in a second actuation state, wherein the spindle nut in the first actuation state exerts a force on the brake piston in the axial direction. The spindle nut in the second actuation state exerts no force on the brake piston in the axial direction. Furthermore, the brake caliper arrangement has a clamping device which exerts a force on the spindle in the axial direction such that in the second actuation state of the spindle drive, the spindle is mounted play-free relative to the housing in the axial direction.