Mechanical Arresting Disk Brake Clearance Indicator
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Solution Overview
Problem
Mechanical arresting disk brakes lack an accurate method to determine when to adjust the brake clearance between friction pads and a disk rotor, leading to either unnecessary adjustments or missed adjustments, due to the difficulty in monitoring wear over time.
Innovation Solution
Incorporating an indicator device with a boundary display on the calliper body and a match display on the mechanical arresting lever, allowing visual confirmation of brake clearance during braking, enabling timely and precise adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If brake clearance is adjusted by releasing lock nut and turning adjustment bolt, then brake clearance can be reduced to reference value, but it becomes difficult to identify when adjustment is needed
Solution Approach 1:
The indicator device is installed beforehand on the calliper body and mechanical arresting lever to continuously monitor brake clearance. The boundary display and match display are pre-positioned to show the reference clearance level, enabling users to know in advance when adjustment is needed without waiting for wear to exceed limits.
Solution Approach 2:
The indicator device provides visual feedback through the boundary display and match display showing the relative position of the mechanical arresting lever to the calliper body. This feedback mechanism continuously informs the user about the current brake clearance status, enabling timely adjustment when the match display approaches or exceeds the boundary display.
2Loss of time
If brake clearance is adjusted every time a certain distance is travelled, then adjustment timing can be determined, but unnecessary adjustment work is performed
Solution Approach 1:
The indicator device provides continuous visual feedback on the actual brake clearance status through the boundary and match displays. This allows users to perform adjustment only when the match display indicates the clearance has exceeded the reference value, eliminating unnecessary adjustments that would occur with fixed-distance scheduling and reducing wasted time and energy.
3Device complexity
If no indicator device is provided, then device complexity is reduced, but accurate monitoring of brake clearance wear is not possible
Solution Approach 1:
The indicator device acts as an intermediary between the brake clearance measurement function and the user. It uses the existing mechanical components (calliper body and mechanical arresting lever) as reference elements, adding only simple visual displays without requiring complex sensors, electronics, or additional measurement mechanisms, thus maintaining structural simplicity while enabling accurate monitoring.
Data Source
Figure 1
Figure 2
AI summary
A mechanical arresting disk brake comprising an adjustment mechanism for adjusting a brake clearance between a friction pad and a side face of a disk rotor by turning an adjustment bolt (3) mounted on a calliper body (1), a mechanical arresting lever (18) for effecting rotation of a piston formed integrally with the adjustment bolt, and a mechanical arresting mechanism that causes braking when the mechanical arresting lever is pulled, an indicator device (32, 33) is provided for determining during braking whether the brake clearance at the friction pad and disk rotor has widened to more than a predetermined amount is provided on the calliper body and the mechanical arresting lever (18). This enables to visually confirm from the outside that the brake clearance at friction pads and disk rotor has widened to more than a predetermined value, in order to correct the brake clearance at the friction pads and disk rotor to a reference dimension.