Integrated Piston Assembly for Parking Brake Stroke Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing parking brake apparatuses face inefficiencies in assembly and are unable to compensate for stroke loss when one elastic member is damaged, as components like the piston, elastic member, bolt screw, and worm gear are separately installed.
Innovation Solution
A parking brake apparatus design that integrates pistons, nuts, and elastic members as a single assembly, with a constraint ring and holder rings to secure the elastic members, allowing one elastic member to compensate for stroke loss even if the other is damaged, improving assembly efficiency and ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the piston, elastic member, bolt screw and worm gear are separately installed, then the assembly structure is simple and easy to manufacture, but the assembling efficiency is degraded and assembly time increases
Solution Approach 1:
The patent integrates the piston, elastic member, bolt screw, and worm gear into a unified integrated piston assembly. The elastic member is installed within the piston body, the bolt screw is fixed to the piston, and the worm gear is integrated with the piston structure, forming a single assembled unit that improves assembly efficiency while maintaining manufacturing simplicity
2Reliability
If separate elastic members are installed for each piston, then each piston can be independently supported, but when one elastic member is damaged the stroke loss cannot be compensated
Solution Approach 1:
The integrated piston assembly design allows a single elastic member to provide support for both pistons. When one elastic member is damaged, the other elastic member can still function to compensate for stroke loss in both pistons, enhancing the system's adaptability and reliability
3Reliability
If the elastic member is damaged, then the piston cannot be elastically pressed toward the brake shoe, but the system should still be able to compensate for stroke loss
Solution Approach 1:
The integrated piston assembly incorporates elastic members that pre-load the pistons toward the brake shoes. When one elastic member is damaged, the remaining elastic member maintains the elastic pressing force on both pistons, providing beforehand cushioning that compensates for stroke loss and ensures continuous brake operation
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
The integrated design enhances assembly efficiency, reduces assembly time, and allows one elastic member to apply its force to both pistons, effectively compensating for stroke losses even if the other is damaged, ensuring reliable brake operation.
Implementation Method 1
an elastic member installed between the piston and the nut so as to pressure the nut toward the brake shoe
Data Source
AI summary
A parking brake apparatus may include: a driving part; a driving gear rotatably connected to the driving part; a gear shaft engaged with the driving gear so as to be rotated by the driving gear; a pair of pistons disposed on both sides of the gear shaft and connected to brake shoes, respectively; a pair of nuts disposed in the respective pistons, and screwed to the gear shaft; an elastic member installed between the piston and the nut so as to pressure the nut toward the brake shoe; a holder installed in the piston so as to support the elastic member; and a constraint ring installed in the piston so as to constrain the holder.