Electric Brake Device with Separate Power Storage
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Solution Overview
Problem
Existing brake devices for human powered vehicles lack a reliable and efficient mechanism to apply brakes to rotary bodies in various situations, especially when the power supply state is uncertain.
Innovation Solution
An electric brake system with an electric actuator powered by a separate power storage, including a braking portion with friction members and forward-reverse mechanisms, and a drive controller that ensures the electric actuator operates using stored power, regardless of the power supply state, allowing for effective braking of rotary bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric actuator is operated only by electric power from the power supply, then the brake device can be operated when power is available, but the brake device cannot operate reliably when the power supply state is uncertain or power is depleted
Solution Approach 1:
The power storage device stores electric power in advance before it is needed, allowing the electric actuator to operate even when the power supply is unavailable or depleted. This preliminary preparation of energy ensures continuous braking capability across all power supply conditions.
Solution Approach 2:
The system changes the power source parameter dynamically - switching between power supply and power storage device based on the power supply state. This parameter change enables the brake device to adapt to different operating conditions and maintain reliability.
2Reliability
If a separate power storage device is added to supply electric power to the electric actuator, then the brake device can operate in various situations, but the device complexity increases
Solution Approach 1:
The power storage device serves multiple functions: it supplies power when the power supply is unavailable, provides backup power when power is depleted, and enables operation in various situations. This multi-functionality justifies the added component by providing comprehensive power assurance.
3Force
If the friction member is pressed against the rotary body to apply brake, then effective braking is achieved, but the mechanism requires additional components to press the friction member
Solution Approach 1:
The electric actuator replaces traditional mechanical braking mechanisms with an electrically-driven system. The actuator converts electrical energy to mechanical motion to press the friction member, providing controlled braking force while simplifying the overall mechanism compared to purely mechanical systems.
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 reliable and efficient braking of rotary bodies in human powered vehicles across various situations, maintaining drivability even when the power supply output is low, without the need for external power, by utilizing stored electric power and intelligent control mechanisms.
Implementation Method 1
an electric actuator operated by electric power from a power supply, a braking portion driven by the electric actuator
Implementation Method 2
the braking portion includes a friction member pressed against the rotary body
Data Source
AI summary
To provide a brake device and an electric brake system that appropriately brakes a rotary body of a human powered vehicle in various situations, a brake device is applicable to a human powered vehicle and includes an electric actuator operated by electric power from a power supply, a braking portion driven by the electric actuator to brake a rotary body of the human powered vehicle, and a power storage provided separately from the power supply to supply electric power to the electric actuator.