Adjustable Brake Master Cylinder Lever for Tunable Force Ratio
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Solution Overview
Problem
Existing brake technologies lack the ability to adjust the torque ratio between the input and output force arms, requiring multiple brake pumps for different user needs and failing to provide customizable braking effects, leading to increased user costs and operational inefficiencies.
Innovation Solution
A brake upper pump with an adjustable force arm mechanism, featuring a pivot mechanism and transmission reversing mechanism to alter the ratio of input and output force arms, allowing users to adjust the torque based on their grip strength and desired braking effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the input force arm is increased to reduce user grip strength requirements, then the piston thrust becomes more direct and easier to generate, but the output stroke decreases making the brake feel less linear
Solution Approach 1:
The brake lever system allows dynamic adjustment of the force arm ratio through movable connection points on the brake lever arm. Users can reposition the connection point between the brake lever and pump body along the lever arm, changing the input and output force arm lengths to optimize between grip strength requirements and stroke length based on real-time operational needs.
2Length of moving object
If the output stroke is increased to make the brake feel more linear, then the braking control becomes smoother, but the input force arm needs to be reduced requiring more user grip strength
Solution Approach 1:
The system provides dynamic adjustability of the force arm ratio by allowing the connection point between brake lever and pump body to be repositioned along the lever arm. This enables users to increase output stroke when smooth control is prioritized, or increase input force arm when grip strength is limited, optimizing performance for different operational scenarios.
3Adaptability or versatility
If multiple brake pumps with different force arm ratios are provided to meet different user needs, then customization and adaptability improve, but device complexity and user costs increase
Solution Approach 1:
The brake lever system incorporates multiple connection points along its length, allowing a single brake lever assembly to function with multiple different force arm ratios. By repositioning the connection between the brake lever and pump body to different locations on the lever arm, one brake pump can provide multiple braking characteristics, eliminating the need for multiple specialized pumps.
Solution Approach 2:
The brake system enables dynamic reconfiguration of the force arm ratio through adjustable connection points. This allows a single brake pump to adapt to different user needs and braking scenarios by changing the effective lever arm lengths, providing customization without requiring multiple separate devices.
4Ease of manufacture
If traditional tools like wire cutters and wrenches are used to tighten brake wires with brute force, then the tightening process can be completed, but the operation becomes time-consuming and labor-intensive with difficulty in adjusting tightness
Solution Approach 1:
The system replaces manual brute-force tightening with a mechanical advantage system using the brake lever as a force multiplier. The lever mechanism converts small input forces applied by the user into large output forces that automatically tighten the brake wires to the appropriate tension, eliminating the need for manual tightening with tools and providing easy adjustment through lever positioning.
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
Enables users to achieve varying piston thrusts with the same grip strength by adjusting the force arm ratio, reducing the need for multiple brake pumps and enhancing operational flexibility and efficiency.
Implementation Method 1
Torque represents the physical quantity of the rotational effect produced when a force acts on an object. The product of the force and the moment arm is called the moment of the force about the axis of rotation.
Implementation Method 2
The connection point between the brake pump body and the brake lever is set as the rotation fulcrum position, and the distance between the rotation fulcrum position and the force-generating position of the user's hand-held brake lever forms the input force arm. The distance between the rotation fulcrum position and the thrust output position forms the output moment arm, and the input torque is equal to the output torque.
Data Source
AI summary
A brake upper pump with an adjustable force arm, including a brake pump body, a brake handle, and a piston rod components extending into the brake pump body; The position where the user holds the brake lever is the grip input position, the connection between the brake pump body and the brake lever is the rotation fulcrum position, the connection between the piston rod assembly and the brake lever is the thrust output position; The distance between the rotation fulcrum position and the force-generating point of the user's hand-held brake lever forms the input force arm, and the distance between the rotation fulcrum position and the thrust output position forms the output force arm; A first force arm adjustable mechanism is provided at the rotation fulcrum, and the first force arm adjustable mechanism can change the rotation center of the brake lever relative to the brake pump body.