Brake Caliper Guide Pin Threaded Coupling for Durable Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing floating-type brake caliper guides require complex production steps, increasing costs and assembly errors, while the undercut fit between the guide pin and sleeve can lead to seal failures and corrosive issues.
Innovation Solution
A guide pin and guide sleeve system with a threaded coupling, eliminating the need for undercut grooves and allowing for a simple, safe, and durable connection, which simplifies assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an undercut fit connection is used between guide pin and guide sleeve, then the connection provides sealing protection, but the production process becomes complex and assembly errors increase
Solution Approach 1:
The invention changes the connection parameter from an undercut fit (requiring groove machining) to a threaded connection. The guide pin features an externally threaded portion that engages with an internally threaded portion in the guide sleeve, eliminating the need for complex undercut groove machining while maintaining secure connection and sealing protection.
2Reliability
If an undercut fit connection is used between guide pin and guide sleeve, then the connection provides sealing protection, but assembly time increases and maintenance becomes difficult
Solution Approach 1:
The connection method is changed from undercut fit requiring precise groove alignment to a threaded connection that is more tolerant of assembly variations. The externally threaded guide pin engages with the internally threaded guide sleeve through simple rotational engagement, significantly reducing assembly time and eliminating the need for complex alignment procedures.
3Ease of manufacture
If a threaded coupling is used between guide pin and guide sleeve, then production costs are reduced and assembly is simplified, but the connection durability may be compromised
Solution Approach 1:
The invention adopts a threaded coupling parameter instead of undercut fit. The guide pin has an externally threaded portion that engages with an internally threaded portion in the guide sleeve, providing a durable, reversible connection that is easier and less costly to manufacture while maintaining connection strength and durability.
Solution Approach 2:
The threaded connection design allows for self-aligning engagement during assembly. The threads guide the components into proper alignment automatically during the screwing process, eliminating the need for precise pre-alignment and reducing assembly complexity while ensuring a secure, durable connection.
4Strength
If undercut grooves are machined on the guide pin, then the guide sleeve can be securely attached, but manufacturing precision requirements increase
Solution Approach 1:
The invention replaces the undercut groove parameter with a threaded parameter. Instead of machining precise grooves on the guide pin, an externally threaded portion is provided that engages with an internally threaded portion in the guide sleeve. This threaded parameter is more tolerant of manufacturing variations and easier to produce with standard threading operations.
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
The object of the present invention is a guide pin (2) for a floating-type brake caliper (100) of a disc brake, in which said brake caliper (100) comprises a caliper body (101) and a bracket (102), wherein said guide pin (2) is configured to be placed between said caliper body (101) and said bracket (102) to allow a relative scrolling between the caliper body (101) and the bracket (102) along an axial direction (A-A), and wherein said guide pin (2) is configured to connect to a guide sleeve (3) and slide at least partially within said guide sleeve (3), in which said guide (2) pin comprises: - a first pin coupling portion (4) configured to couple said guide pin (2) to said guide sleeve (3); - a pin sliding portion (5) configured to guide in a sliding manner said guide pin (2) into a sliding housing (103) formed in either said caliper body (101) or said bracket (102); - a second pin coupling portion (6) configured to couple said guide pin (2) to either said bracket (102) or said caliper body (101), wherein said first pin coupling portion (4) is arranged between said second pin coupling portion (6) and said pin sliding portion (5), wherein said first pin coupling portion (4) is threaded to form a threaded coupling between said guide pin (2) and said guide sleeve (3) .