Parking Caliper Axial Guide and Abutment Geometry
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Solution Overview
Problem
Existing parking caliper assemblies for disc brakes are bulky, particularly in the circumferential direction, and do not effectively reduce overall dimensions, with previous solutions interfering with the disc brake's friction material.
Innovation Solution
A caliper assembly design featuring a pin seat and suspension pin within the caliper body, with a channel and abutment surfaces oriented to avoid coplanarity, allowing the pad to be suspended radially outward and guided without lateral interference with the disc brake, utilizing a suspension spring to maintain the pad's position and facilitate sliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pad is supported by overhangs of the supporting plate arranged laterally to the friction material, then the pad can be housed in the caliper body, but the caliper body becomes bulky in the circumferential direction
Solution Approach 1:
The invention relocates the pad support structure from a lateral arrangement (circumferential direction) to an axial arrangement. The supporting plate extends axially toward the disc rather than laterally, and the abutment surfaces are positioned on the axial face of the caliper body. This dimensional shift allows the pad to be housed without increasing the caliper's circumferential dimensions.
2Ease of operation
If a bracket projects towards the disc to provide an abutment surface laterally to the pad, then the pad can be supported, but the overall dimensions of the assembly increase
Solution Approach 1:
Instead of projecting the abutment surface laterally (radially) toward the disc, the invention positions the abutment surface on the axial face of the caliper body. The supporting plate extends axially to engage this surface, changing the support geometry from radial to axial projection. This eliminates the need for lateral brackets and reduces the assembly's circumferential length.
3Device complexity
If the guide surface and abutment surface are coplanar, then the structure is simplified, but the pad coupling interferes with the disc brake
Solution Approach 1:
The invention makes the guide surface and abutment surface non-coplanar, creating an asymmetric arrangement where the guide surface is offset from the abutment surface in the axial direction. This asymmetric geometry positions the pad coupling components (supporting plate and pin) radially outward, clearing the disc brake's friction material area and eliminating interference while maintaining structural functionality.
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 design significantly reduces the overall dimensions of the caliper assembly while ensuring accurate operation and reliable braking performance, even in harsh environments, by positioning the pad and caliper body coupling radially outward and avoiding lateral interference with the disc brake.
Implementation Method 1
at least one suspension spring anchoring with the ends thereof to the upper surface of the caliper body and passes around the suspension pin below it on the opposite side to said upper surface to move said pin away from the disc and to move it away from the disc together with the suspended pad
Implementation Method 2
said at least one guide surface is oriented differently with respect to said at least one abutment surface so as to avoid that said guide surface and said abutment surface are coplanar
Data Source
AI summary
An assembly comprising a caliper body (2) of a caliper assembly for parking disc brake, said caliper body (2) comprising a channel (14), said axial channel (14) being defined by at least one wall having at least one flattened length forming at least one guide surface (15; 16); at least one portion of caliper body (10) projecting towards the disc or above the disc (3), said portion of caliper body (10) comprising a surface facing the disc (11) or at least the friction material (12) of said pad (8), and wherein said surface facing the disc (11) has a flattened length forming at least one abutment surface (12; 13) and wherein said at least one guide surface (15; 16) is oriented differently with respect to said at least one abutment surface (12; 13) so as to avoid that they are mutually coplanar; said guide surface (15; 16) is suitable to face an opposite guide surface (25; 26) provided for on an associable supporting plate (21, 22) of an associable pad (8) in order to allow the positioning and sliding thereof against the caliper body (2) and wherein, in said abutment surface (12, 13), it is suitable to face an opposite abutment surface (27, 28) provided for on the supporting plate (21, 22) of at least one associable pad (8) so as to allow the pad to abut and slide against said abutment surface (12; 13).