Brake Caliper Spreading Mechanism With Rolling Actuation Surfaces
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Solution Overview
Problem
Existing brake devices with spreading elements designed as levers experience increased wear and actuation resistance due to relative movements between components, leading to complex designs and higher manufacturing costs.
Innovation Solution
A brake device design where the pressing part is guided linearly along a straight line on the brake caliper, with a spreading element that rolls directly on actuation surfaces, minimizing relative movements normal to the straight line and eliminating the need for additional roller bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a spreading element designed as a lever is used to mechanically apply contact force, then the brake device can be actuated with compressed air, but relative movements between components occur causing increased wear and actuation resistance
Solution Approach 1:
The patent changes the geometric parameters of the spreading element, specifically designing it with a curved rolling path instead of a straight lever arm. This parameter change allows the spreading element to roll smoothly between the friction blocks, converting sliding friction into rolling friction and thereby reducing wear and actuation resistance while maintaining the mechanical advantage needed for compressed air actuation
2Ease of operation
If the spreading element is shaped to cause rotation, then a lateral component of movement occurs on the pressing part, but this requires complex mounting or additional roller bearings
Solution Approach 1:
The patent applies curvature to the spreading element by designing it with a curved rolling path that matches the arc of rotation. This curved geometry allows the spreading element to rotate while maintaining continuous contact with both friction blocks, eliminating the need for complex linear guidance mechanisms or additional roller bearings to accommodate lateral movements
3Reliability
If additional roller bearings or compensating devices are used to absorb relative movements, then the brake device can function with reduced wear, but the manufacturing effort and size increase
Solution Approach 1:
The patent extracts the harmful sliding friction mechanism from the system by replacing it with a rolling contact mechanism. The spreading element is designed to roll between the friction blocks, eliminating the need for additional roller bearings or compensating devices that would be required to manage sliding wear, thereby simplifying manufacturing while reducing wear
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The brake device operates with low actuation resistance and minimal wear, while maintaining a simple and compact design, effectively addressing the issues of increased wear and resistance in existing technologies.
Implementation Method 1
the first spreading element surface (13) is in direct contact with one of the two actuation surfaces (7, 10) during actuation and rolls thereon
Data Source
AI summary
A brake device includes a brake caliper with a first frictional surface and a first actuation surface, a pressing part of the brake device being linearly guided along a first straight line on the brake caliper. The pressing part has a second frictional surface and a second actuation surface, a region being provided between the first frictional surface and the second frictional surface for arranging a brake element. The brake device has a rotatable spreading element which interacts with the first actuation surface and the second actuation surface. During a rotation of the spreading element, the rotation occurring in order to actuate the brake device, a first spreading element surface is in direct contact with a first rolling surface and rolls substantially on the first rolling surface, and the first rolling surface corresponds to the first actuation surface or the second actuation surface.