Disk Brake Joining Terminal Vibration Resilience
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Solution Overview
Problem
Conventional disk brakes experience unstable electric power supply to the electric motor due to vibrations when the vehicle is running, caused by the elastic coupling of connector and joining terminals.
Innovation Solution
A disk brake design featuring a motor with a housing containing a rotation-linear motion conversion mechanism, a connector terminal with a plate-like shape, and a joining terminal with a fixation portion, biasing portion, protruding portion, and welded portion to securely connect and stabilize the power supply wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If elastic coupling is used to join connector terminal and joining terminal, then ease of assembly is improved, but reliability of electric power supply deteriorates due to vibration
Solution Approach 1:
The joining terminal is divided into multiple functional portions: a contact surface portion for electrical connection, a biasing portion for applying contact force, and a protruding portion for positioning. This segmentation allows each portion to perform its specific function optimally while working together to solve the contradiction between easy assembly and reliable connection.
Solution Approach 2:
Different portions of the joining terminal have different local properties: the contact surface portion provides electrical conductivity, the biasing portion provides elastic force, and the protruding portion provides mechanical positioning. This local differentiation enables the terminal to simultaneously achieve easy assembly through elastic coupling and reliable connection through localized functional optimization.
2Manufacturing precision
If protruding portion is added to joining terminal, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The protruding portion is merged with the biasing portion and contact surface portion to form a single integrated joining terminal. This merging approach achieves precise positioning functionality without requiring separate positioning components, thereby improving positioning precision while avoiding increased device complexity.
Solution Approach 2:
The joining terminal serves multiple functions simultaneously: the protruding portion provides positioning, the biasing portion provides electrical contact force, and the contact surface portion provides electrical connection. This multi-functionality allows a single component to achieve precise positioning without adding separate positioning devices, thus avoiding increased complexity.
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
Ensures stable electric power supply to the motor by securely joining the connector and joining terminals, reducing the impact of vibrations and improving the reliability of the connection structure.
Implementation Method 1
a biasing portion extending from a side of the contact surface portion to a back surface of the flat plate surface of the connector terminal and configured to bias the contact surface portion so as to bring the contact surface portion into close contact with the connector terminal
Implementation Method 2
a welded portion formed so as to extend over the end of the connector terminal on the one side thereof closer to the opening portion and the end of the contact surface portion on the one side thereof closer to the opening portion
Data Source
AI summary
A disk brake allowing a connector terminal (255) and a joining terminal (256) to be easily positioned in a width direction thereof and a direction toward an opening portion of a housing, because the joining terminal fixed to one end of a harness includes individual protruding portions (265) and a pair of biasing portions (264). Further, due to each of the biasing portions, the connector terminal and the joining terminal can be brought into close contact with each other. Further, due to the protruding portions of the joining terminal, an end (258A) of the connector terminal and an end (268A) of a contact surface portion (263) can be brought into alignment with each other, which facilitates formation of such a welded portion (266) that extends over the respective ends, and thus achieves a secure connection between the connector terminal and the joining terminal.