Vehicle Disc Brake Pad Spring Assembly Mechanism
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Solution Overview
Problem
The assembly of the pad spring in existing vehicle disc brakes is time-consuming and labor-intensive due to the design where the hanger pin is sandwiched between the curved piece and cover piece, making it difficult to assemble efficiently.
Innovation Solution
A vehicle disc brake design featuring a caliper body with a locking groove and a pad spring with curved and inclined spring-back parts that allow easy assembly by abutting against the hanger pin and locking to the groove, preventing friction pad rattling through inward biasing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hanger pin is sandwiched between the curved piece and cover piece for assembly, then the pad spring can be securely assembled, but it takes time and effort to assemble
Solution Approach 1:
The hanger pin is extracted from the sandwiching assembly method and repositioned to suspend from the ceiling opening before inserting the pad spring. This eliminates the need to sandwich the pin between components, allowing the curved piece to be directly inserted and secured to the pin without complex manipulation, thereby reducing assembly time while maintaining secure assembly.
2Reliability
If the pad spring is designed with curved piece abutting against hanger pin, then the friction pads are securely biased, but the assembly process becomes complex
Solution Approach 1:
The hanger pin is preliminarily suspended from the ceiling opening in a ready position before the pad spring is assembled. This preliminary action allows the curved piece of the pad spring to be directly engaged with the pin without requiring complex sandwiching or adjustment operations, simplifying the assembly process while ensuring the curved piece properly abuts against the pin for secure biasing of the friction pads.
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
Facilitates easy assembly of the pad spring, effectively prevents friction pad rattling, reduces abutting noise, and enhances durability by shifting stress points and allowing for adjustable spring-back force settings.
Implementation Method 1
a pad spring configured to bias the friction pads inward in a disc radial direction
Implementation Method 2
a pad spring that hangs the friction pads so as to be movable in the disc axial direction, and that prevents rattling of the friction pads
Data Source
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AI summary
The present invention provides a a vehicle disc brake (1),comprising: a caliper body (3) disposed across a disc rotor (2); a pair of friction pads (4) disposed on both side parts of the disc rotor (2); and a pad spring (5) configured to bias the friction pads (4) inward in a disc radial direction, wherein: the caliper body (3) is provided with a ceiling opening (3f) for inserting and removing the friction pads (4) into and from a bridge part (3b) across an outer periphery of the disc rotor (2), each of the friction pads (4) is provided with a suspension piece (4f) at a central part in a disc circumferential direction (A) in a protruding manner, and is hung to be movable in a disc axial direction by inserting a hanger pin (13), which is suspended in the disc axial direction through the ceiling opening (3f), through the suspension piece (4f), and the pad spring (5) includes: a curved piece (5a) abutting against an inside in the disc radial direction of the hanger pin (13), a run-in side pad spring-back part (5b) extending from the curved piece (5a) to a disc run-in side and configured to press the friction pad (4) inward in the disc radial direction, and a locking piece (5d) provided at a tip of the run-in side pad spring-back part (5b) and locked to an inside in the disc radial direction of a disc run-in side surface of the ceiling opening (3f).