Disc Brake Rolling Bearing Assembly With Clamped Cage Alignment
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Solution Overview
Problem
Existing disc brake systems face issues with reduced braking effectiveness due to improper alignment or detachment of rolling bearings between the pivot lever and thrust piece, which can be caused by insufficient alignment or positioning between the bearing shell segment and the bearing cage, leading to potential power loss and functional impairment.
Innovation Solution
A rolling bearing design featuring a bearing cage with recesses and stop parts on the bearing shell segment that engage to create a clamping effect, ensuring precise alignment and secure attachment during assembly, and allowing the bearing cage to move into its operating position upon brake application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retaining means are provided on the bearing cage to prevent rolling elements from sliding off during assembly, then the bearing cage can be releasably fixed to the bearing shell, but the locking elements may break off upon first brake actuation and become freely movable within the rolling bearing, potentially impairing brake function
Solution Approach 1:
The invention extracts the harmful function of breaking locking elements by completely removing the retaining means from the bearing cage. Instead, the bearing shell segment is designed with an integrated retention function through its geometry - the bearing shell segment has a free end that can be inserted into a receiving space on the thrust piece, creating a retention connection without any separate locking elements that could break and become contaminants.
Solution Approach 2:
The invention merges the retention function into the bearing shell segment itself rather than using separate retaining means on the bearing cage. The bearing shell segment's free end and the thrust piece's receiving space form an integrated retention system, combining the support and retention functions into a unified structural arrangement that eliminates the risk of breaking locking elements.
2Manufacturing precision
If the bearing cage is securely fixed in the assembly position, then alignment precision is improved, but the bearing cage must be released and moved to the operating position upon brake actuation
Solution Approach 1:
The invention applies dynamics by designing the bearing cage and bearing shell segment connection to transition from a fixed assembly position to a released operating position. The bearing cage can be securely positioned during assembly for precise alignment, then naturally moves to its operating position when the brake is actuated, allowing the system to adapt its state based on operational requirements without complex release mechanisms.
Solution Approach 2:
The invention applies preliminary action by pre-positioning the bearing cage in the correct alignment during assembly using the bearing shell segment's geometric features. The bearing shell segment's free end inserted into the thrust piece's receiving space establishes the correct position beforehand, ensuring alignment precision is achieved during assembly before the brake is actuated and the bearing cage moves to its operating position.
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 clamping effect ensures proper alignment and secure attachment of the bearing cage, preventing unintentional movement and maintaining optimal braking performance by minimizing power loss and ensuring reliable force transmission.
Implementation Method 1
The clamping action of the bearing cage on the bearing shell segment of the rolling bearing is based on a frictional connection between the interacting contact surfaces of the recess and the stop part.
Data Source
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AI summary
The invention relates to a rolling element bearing (10) for a disc brake, in particular for a pneumatic disc brake, wherein the disc brake has a brake cylinder, a pivot lever (140) which is drivingly coupled to the brake cylinder, and a thrust piece (120) that is supported on the pivot lever (140) via the rolling element bearing (10), the rolling element bearing comprising a bearing shell segment (12) and a bearing cage (14) having rolling elements (16) that roll on the bearing shell segment (12), wherein the bearing cage (14) can be moved in the peripheral direction of the bearing shell segment (12) and is designed to be detachably fixed in an assembly position relative to the bearing shell segment (12). The bearing cage (14) has a stop surface (22) having at least one recess (24, 24', 24''), and the bearing shell segment (12) has at least one stop part (20, 20'), the recess (24, 24'') and the stop part (20, 20') each being assigned to one another and being designed to be engaged with one another in the assembly position, producing a clamping effect.