Commercial Vehicle Disc Brake Caliper Restoring Mechanism
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Solution Overview
Problem
Existing disc brakes for commercial vehicles experience increased fuel consumption and reduced service life due to residual grinding moments, as the brake caliper does not maintain a consistent air play dimension between the brake disc and pads, leading to unsatisfactory restoration after braking.
Innovation Solution
A disc brake design featuring a brake caliper with a statically friction-held supporting part on a guide spar, connected to an elastic restoring element, which compensates for wear-induced air play changes and automatically resets the caliper to its initial position using a restoring device, ensuring consistent air play restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compression spring is used as a restoring element to return the brake caliper to its initial position, then the brake caliper can be restored after braking, but the restoring is not exact and air play dimension cannot be consistently maintained
Solution Approach 1:
The patent changes the physical state of the restoring element from an elastic compression spring to a viscous fluid-filled damper. This parameter change allows the system to provide both restoring force and damping control, enabling exact restoration of the brake caliper to its initial position while maintaining consistent air play dimensions. The viscous fluid's resistance to flow provides controlled restoration without the overshoot and inconsistency inherent in spring-based systems.
2Ease of manufacture
If the brake caliper remains in the displaced position after braking, then the structure is simple, but residual grinding moments occur leading to increased fuel consumption and reduced service life
Solution Approach 1:
The patent implements a self-restoring mechanism where the viscous fluid in the damper automatically returns the brake caliper to its initial position after braking without requiring external intervention. This self-service function eliminates residual grinding moments between the brake pads and disc, preventing energy loss through friction during non-braking operation and thereby reducing fuel consumption.
3Ease of operation
If the supporting part slides on the guide spar during braking displacement, then the brake caliper can move freely, but the position cannot remain constant with respect to the brake carrier
Solution Approach 1:
The patent introduces a viscous fluid as an intermediary substance between the supporting part and the guide spar. This fluid-filled damper allows the brake caliper to move freely during braking while simultaneously maintaining the supporting part's position stability relative to the brake carrier. The viscous fluid transmits force while resisting positional changes, acting as a mediator that reconciles the conflicting requirements of movement freedom and position stability.
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 effectively reduces fuel consumption and extends the service life of brake components by maintaining consistent air play dimensions and preventing grinding during driving operations, with adjustable restoring forces suitable for various vehicle conditions.
Implementation Method 1
a restoring device, which is arranged on the action side and has a restoring element which can be deformed elastically during the braking-induced displacement of the brake caliper
Implementation Method 2
the supporting part, which remains in its position with respect to the brake carrier during the braking-induced displacement of the brake caliper
Data Source
AI summary
A disc brake, particularly for a commercial vehicle, includes a brake caliper configured as a sliding caliper, two brake pads, which are disposed in the brake caliper, at least one guide spar for fastening the brake caliper to a stationary carrier, a brake application device, effective via at least one adjusting spindle, an adjusting device, which is non-rotatably connected to the adjusting spindle, for compensating brake pad wear, and a restoring device, disposed on the action side and having a restoring element that is elastically deformable if the brake caliper is displaced as a function of the braking operation and by which the caliper can be automatically brought into a starting position. The disc brake is configured such that the restoring device has a supporting part, which remains in position relative to the brake anchor plate if the brake caliper is displaced as a function of the braking operation, and which interacts with the resilient restoring element.