Electric Parking Brake Second Member Guiding Stability
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Solution Overview
Problem
Conventional electric parking brakes suffer from instability during sudden braking due to the second braking member having multiple degrees of freedom relative to the main body unit, which can cause the parking brake to lift up.
Innovation Solution
The electric parking brake design includes a main body unit with elongate guiding members and recesses that form an accommodating space, a lining unit with positionable linings, and an actuating unit with a driving shaft that engages the braking members to ensure the second braking member has limited movement, preventing it from lifting during sudden braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the second braking member is allowed to have multiple degrees of freedom relative to the main body unit, then the ease of operation is improved, but the parking stability deteriorates
Solution Approach 1:
The braking unit is divided into separate components: the second braking member is separated from the main body unit and connected through the connecting member with hollow sliding portions. This segmentation allows the second braking member to move independently along the guiding members while maintaining stability, resolving the contradiction between ease of operation and parking stability.
Solution Approach 2:
The connecting member with hollow sliding portions acts as an intermediary between the second braking member and the main body unit. The hollow sliding portions engage with the elongate guiding members to provide guided movement, enabling the second braking member to operate freely while preventing unwanted lifting movements that would compromise parking stability.
2Stability of the object's composition
If the second braking member is constrained to limited movement, then the parking stability is improved, but the ease of operation deteriorates
Solution Approach 1:
The system transitions from a static constrained connection to a dynamic guided connection. The hollow sliding portions allow the second braking member to move dynamically along the elongate guiding members during operation, while the guiding members themselves provide the constraint to prevent lifting. This dynamic design maintains both ease of operation and parking stability.
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
This configuration enhances the parking stability by ensuring the second braking member remains engaged, maintaining effective clamping of the brake disk and preventing instability during braking operations.
Implementation Method 1
The driving shaft has a threaded portion threadedly engaging the first braking member such that, through operation of the actuator, the first lining is driven by the first braking member to move toward the first side surface
Implementation Method 2
a pair of hollow sliding portions that are disposed respectively on the side edges, and that are respectively and movably sleeved on the guiding members
Data Source
AI summary
An electric parking brake includes a driving shaft, an actuator, first and second braking members, and first and second linings. The driving shaft has a threaded portion threadedly engaging the first braking member such that, through operation of the actuator, the first lining is driven by the first braking member to move toward a side surface of a brake disk in a direction to thereby move the second braking member to move toward an opposite side surface of the brake disk in an opposite direction, so that the first and second linings are moved toward each other to clamp the brake disk therebetween.