Utility Vehicle Disc Brake Leaf Spring Reset for Drag Torque
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Solution Overview
Problem
Existing disc brakes for utility vehicles suffer from residual grinding torques after braking, leading to increased fuel consumption and reduced service life of brake discs and pads, due to the inability to effectively reset the brake caliper.
Innovation Solution
The design incorporates leaf springs attached to the rear side of the pad carrier plate, which are supported on the brake carrier horns, exerting a resetting force on the brake pads and centering them in relation to the brake disc, thereby reducing residual grinding torques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a resetting device is arranged on the brake carrier to reset the brake caliper, then the service life of brake pads and discs is improved, but the device complexity increases
Solution Approach 1:
The patent changes the physical state and configuration of the resetting element from a complex mechanical device to a simple leaf spring with specific geometric parameters. The leaf spring's dimensions, material properties, and mounting position are optimized to provide the necessary resetting force without requiring additional complex mechanisms.
Solution Approach 2:
The patent extracts the essential resetting function from complex existing resetting devices and implements it through a simple leaf spring element. By removing unnecessary components and retaining only the core resetting mechanism, the solution reduces device complexity while maintaining the service life improvement benefit.
2Object-generated harmful factors
If the brake caliper is displaced into initial position by resetting device, then residual grinding torques are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The leaf spring provides a dynamic resetting mechanism that automatically adapts to variations in brake pad wear and component tolerances. The spring's elastic properties allow it to maintain effective resetting force throughout the service life of the brake pads, compensating for dimensional changes without requiring high manufacturing precision.
Solution Approach 2:
The patent utilizes the elastic parameters of the leaf spring to create a self-adjusting resetting system. The spring's deflection characteristics and force-displacement relationship are designed to provide optimal resetting force across a range of positioning conditions, reducing the impact of manufacturing tolerances on residual grinding torques.
3Force
If leaf spring is attached to pad carrier plate rear side, then resetting force is applied to brake pads, but the ease of manufacture decreases
Solution Approach 1:
The leaf spring is integrated with the pad carrier plate as a single assembly, combining the mounting bracket and resetting element into one manufacturable unit. This merging allows the component to be produced as a single piece or pre-assembled unit, simplifying the manufacturing process and reducing the number of separate parts that need to be handled and installed.
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 solution effectively reduces residual grinding torques, increases the service life of brake pads and discs, and lowers overall operating costs by ensuring proper alignment and resetting of the brake pads.
Implementation Method 1
a resetting element, in particular a leaf spring, which is designed to exert a resetting force on the brake pad in the released state of the brake
Implementation Method 2
an action-side brake pad is pressed against a vehicle-side brake disc in the event of braking
Data Source
AI summary
A disc brake for a utility vehicle includes a brake caliper that is in the form of a sliding caliper and overlaps a brake disc; two brake pads which are located in the brake caliper, can be moved in opposite directions in the direction of the brake disc, each have a pad backing plate and a friction lining fastened thereto, and are each located in a pad shaft of a vehicle-side brake carrier, which pad shaft is delimited in the direction of rotation of the brake disc by brake carrier horns; and at least one restoring device by which the brake pads can be restored after a braking-related movement and release of the brake. The restoring device has at least one restoring element which is attached to a brake pad, is located between the brake pad and a stationary component, and exerts a restoring force on the brake pad, the at least one restoring element being in the form of a leaf spring which is fastened on the rear side of the pad backing plate facing away from the friction lining and has a spring arm which extends in the peripheral direction of the brake disc and is supported against the brake carrier as a stationary component.