Disc Brake Pad Retainer Layout for Wheel-Clearance Assembly
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Solution Overview
Problem
Existing disc brake systems face challenges in producing components inexpensively and easily assembling/disassembling brake pads, while also dealing with space constraints that lead to potential rubbing of brake parts against the rotating vehicle wheel, causing additional bending loads.
Innovation Solution
A brake pad holder and hold-down device with a fastening opening that has a central axis aligned with the width of the hold-down device and a bolt extending in the circumferential direction of the brake disc, featuring a tube or eyelet design that reduces protrusion and allows for a more compact arrangement, with a two-part configuration and metallic sealing to enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the brake disc is made as large as possible for high braking performance, then braking performance is improved, but the clearance between disc brake components and the rotating wheel is reduced
Solution Approach 1:
The mounting opening is reoriented from a radial direction to a circumferential direction, changing the dimensional orientation of the fastening structure. This allows the brake pad holder to be positioned more optimally within the constrained radial space, reducing protrusion into the wheel clearance zone while maintaining large brake disc dimensions for braking performance
2Ease of operation
If the mounting opening extends radially towards the brake disc for conventional fastening, then assembly is simplified, but brake components project radially outwards causing rubbing against the wheel
Solution Approach 1:
The mounting opening is reoriented from radial to circumferential direction, changing the fastening approach from radial insertion to circumferential insertion. This dimensional change allows the bolt to pass through the holder in a direction parallel to the brake disc rotation, reducing radial protrusion while maintaining assembly feasibility through alternative access paths
3Object-affected harmful factors
If a fully enclosed mounting opening with circumferential orientation is used, then radial protrusion is reduced, but the fastening structure becomes more complex
Solution Approach 1:
The circumferentially oriented mounting opening serves multiple functions: it reduces radial protrusion to prevent rubbing, provides alternative fastening paths for assembly, and allows for both bolt and rivet fastening methods. This multi-functionality justifies the increased structural complexity by delivering multiple benefits simultaneously
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 solution enables cost-effective production and easy assembly/disassembly of brake pads while reducing the risk of brake parts rubbing against the vehicle wheel, thereby alleviating structural narrowness and enhancing braking performance.
Implementation Method 1
an eyelet consisting of a section of material from the hold-down device that has been deformed by at least 300°
Implementation Method 2
the tube is bonded to the base, e.g., by welding
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
A brake pad holder for a vehicle disc brake is proposed, comprising brake pads (3) arranged on both sides of a brake disc in a pad recess (6) of a brake caliper (1), and a retainer (7) leading transversely over the brake pads (3), which is supported indirectly or directly against the brake pads (3) towards the disc brake axis (A) and has an end region at each of its two ends with which the retainer (7) is supported against the brake caliper (1).In order to further develop a brake pad holder for a disc brake in such a way that the parts required for this can be manufactured cost-effectively and the assembly and disassembly of the brake pads can be carried out easily, and to create a suitable retainer for such a brake pad holder, the retainer (7) is provided in one of the end areas with a fully or almost fully closed mounting opening (11) which extends in the circumferential direction of the brake disc.