Brake Caliper Piston Tool for In-Place Pad Replacement
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Solution Overview
Problem
Current methods for replacing brake pads in hydraulic disk brakes require dismantling the bicycle, are time-intensive, inaccurate, and can cause piston damage, leading to increased maintenance costs and the need for brake system realignment.
Innovation Solution
A caliper piston tool with a first handle and a second handle that pivot at a joint, featuring a guide track and drive finger mechanism, allowing for the separation of brake pistons without removing the wheel or brake caliper, enabling pad replacement without disassembling the bicycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If current tools and methods are used to replace brake pads, then the brake pads can be replaced, but the wheel and brake caliper must be removed from the bicycle, increasing time and complexity
Solution Approach 1:
The invention extracts the brake pad replacement function from the overall brake system disassembly process. By designing a tool that can access and manipulate brake pads through the existing caliper structure without removing the wheel or caliper, it separates the pad replacement task from system disassembly, enabling maintenance while the brake system remains installed on the bicycle.
Solution Approach 2:
The invention introduces an intermediary tool that mediates between the technician and the brake pad replacement process. This tool includes a pressing element with a pressing surface that contacts the brake pad, and a handle mechanism that transmits force to push the brake piston back, enabling pad replacement without direct manual manipulation of the piston or caliper components.
2Productivity
If current tools are used to push back brake pistons, then the pistons can be repositioned, but piston damage may occur and realignment is required
Solution Approach 1:
The invention applies local quality by designing a pressing element with a specifically shaped pressing surface that matches the geometry of the brake pad and piston interface. This localized contact design ensures force is applied precisely where needed on the piston face, distributing pressure evenly to prevent damage while effectively pushing the piston back to its retracted position.
Solution Approach 2:
The pressing element incorporates a cushioning feature in the form of a pressing surface that gradually contacts the piston. This design provides beforehand cushioning by allowing controlled, progressive force application rather than sudden impact, preventing piston damage while achieving the necessary retraction distance for brake pad installation.
3Ease of operation
If brake system disassembly is performed for pad replacement, then pads can be accessed, but time is lost and maintenance costs increase
Solution Approach 1:
The invention enables self-service maintenance by allowing technicians to replace brake pads through the existing caliper structure without requiring removal of the wheel or caliper from the bicycle. The tool is designed to access the brake pad and piston assembly through the open caliper, enabling the replacement process to be performed in-situ on the installed brake system.
Solution Approach 2:
The tool incorporates a handle mechanism with a pivot point and linking element that pre-positions the pressing element for direct contact with the brake piston. This preliminary action design allows the pressing surface to be immediately positioned against the piston face when the handle is actuated, eliminating the need for additional disassembly steps or alignment procedures that would consume time.
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
Facilitates convenient and cost-effective brake pad replacement without dismantling the bicycle, reducing time and maintenance costs, and preventing piston damage, while allowing for precise alignment of the brake system.
Implementation Method 1
a drive finger fixed in position on the second handle, and a second paddle. The second paddle includes a drive socket, wherein the drive finger is engaged within the drive socket, and a guide follower constrained to linear motion along the guide track, wherein rotation of the drive finger about the handle joint drives a linear motion of the guide follower along the guide track
Data Source
AI summary
In order for hydraulic disk brakes to function properly over time, associated brake pads are changed periodically. In order to exchange old brake pads for replacement brake pads, a disk brake may require pushing back the brake pistons within a brake caliper body in order to make room for installation of replacement pads. Current tools and methods typically require removal of a wheel from a vehicle, removal of a brake rotor from the wheel, and/or removal of the brake caliper body from a rotor. The presently disclosed caliper piston tool allows brake pads to be replaced without dismantling various components of the vehicle, resulting in significant time and cost savings as well as convenience for do-it-yourself and professional mechanics alike.