Friction Brake Device Torque Transmission Segmentation
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Solution Overview
Problem
Existing friction brake devices require larger calipers to generate higher braking forces, which increases size and complexity, and do not efficiently transmit rotational torque to friction members without relying on friction forces.
Innovation Solution
A friction brake device design featuring first and second disk parts extending around the rotation axis with a connection part, rotating friction members supported by a stationary member, and rotational torque transmission mechanisms that transmit torque independently of friction forces, allowing friction members to autorotate and engage with disk parts, reducing the need for a caliper and enhancing braking torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the caliper is increased in size to generate higher braking force, then the braking force is improved, but the device size increases
Solution Approach 1:
The brake rotor is segmented into first and second disk parts spaced apart along the rotation axis, with friction members pressing against both disk parts simultaneously. This segmentation allows the friction members to engage with multiple surfaces, generating higher braking force without increasing the overall device size.
Solution Approach 2:
The friction members are configured to press against both the side surface of the disk part and the inner surface of the cylindrical part, utilizing multiple dimensional surfaces for friction engagement. This multi-dimensional engagement approach maximizes braking force generation within a compact space.
2Strength
If the caliper is increased in size to prevent deformation from reaction forces, then the strength is improved, but the device complexity increases
Solution Approach 1:
The caliper structure is extracted and replaced with a stationary member that simply supports the friction members between the first and second disk parts. The pressing devices are independently supported by the stationary member, eliminating the need for a complex caliper structure while effectively managing reaction forces.
Solution Approach 2:
Instead of using a caliper to support and press the friction members, the friction members are supported between the disk parts by a stationary member, with pressing devices acting independently. This inverted support structure simplifies the overall design while maintaining strength.
3Device complexity
If rotational torque is transmitted through friction forces between the brake rotor and friction members, then the structure is simplified, but the torque transmission reliability is insufficient
Solution Approach 1:
A rotational torque transmission mechanism is introduced as an intermediary between the brake rotor and the friction members. This mechanism positively transmits rotational torque from the brake rotor to the friction members, ensuring reliable torque transmission without relying solely on friction forces.
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 enables higher braking torque generation without increasing the brake device's size, improves rigidity, simplifies structure, and reduces the risk of deformation, while allowing for easier assembly and maintenance, and enhances durability by containing the friction members and pressing devices within a closed space filled with lubricant.
Implementation Method 1
a friction brake device which generates a friction force by pressing a friction member against a brake rotor
Implementation Method 2
enhances durability by containing the friction members and pressing devices within a closed space filled with lubricant
Data Source
AI summary
A friction brake device has a brake rotor including a disk part and a subsidiary rotor spaced apart from each other along a rotation axis and a cylindrical part integrally connecting their outer peripheral portions, brake pads which are rotatably supported around an autorotation axis parallel to the rotation axis between the disk part and the subsidiary rotor by a stationary member, rotational torque transmission devices which mutually transmit rotational torques between the brake rotor and the brake pads, and pressing devices which are supported between the disk part and the subsidiary rotor by the stationary member and press the brake pads against the disk part and the subsidiary rotor.