Commercial Vehicle Disc Brake Synchronizing Tension Spring
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Solution Overview
Problem
The existing disc brake systems for commercial vehicles face issues with uneven wear and reduced braking efficiency due to the stretching of traction devices, leading to an uneven air gap between the brake disc and friction lining, resulting in oblique wear and reduced service life.
Innovation Solution
A disc brake system incorporating a tension spring, designed as a leaf spring, which is firmly clamped on one side and adjustable on the other, is used to compensate for the operational lengthening of the traction means, ensuring consistent chain tension through an adjustably arranged screw, and is integrated into the brake caliper without significant structural changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traction means (chain, toothed belt) is used to synchronously transmit rotary movements between adjusting spindles, then synchronous adjustment of both brake pads is achieved, but the traction means stretches with increasing operating time causing transmission play and loss of synchronism
Solution Approach 1:
The patent introduces a dynamic compensation mechanism where the second adjusting spindle can independently move axially relative to the bridge. This axial movement compensates for the stretching of the traction means, maintaining synchronous adjustment reliability throughout the service life of the brake system.
Solution Approach 2:
The patent changes the positional parameter of the second adjusting spindle along the axial direction. By allowing this spindle to move axially, the system compensates for the lengthening of the traction means, thereby maintaining the constant air gap and synchronous adjustment function throughout operation.
2Manufacturing precision
If the air gap between brake lining and brake disc becomes uneven due to traction means stretching, then the friction lining does not make full contact with the brake disc during braking, but this leads to oblique wear and reduced service life
Solution Approach 1:
The patent makes the position of the second adjusting spindle dynamic along the axial direction, allowing it to self-adjust and compensate for traction means stretching. This maintains uniform air gap and ensures full contact between friction lining and brake disc, preventing oblique wear.
Solution Approach 2:
The axial movement of the second adjusting spindle acts as a feedback mechanism that automatically compensates for the stretching of the traction means, maintaining the air gap within acceptable tolerances and ensuring uniform wear characteristics throughout the service life of the friction lining.
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 maintains consistent adjustment of the brake pads, preventing uneven wear and ensuring full contact with the brake disc, thereby enhancing the braking effect and extending the service life of the friction lining.
Implementation Method 1
A tension spring, which preferably acts approximately in the central area of the strand, based on its longitudinal extension, ensures that operational lengthening of the traction means is compensated for.
Data Source
Figure 1
Figure 2~3
AI summary
A disc brake for a commercial vehicle with a brake caliper overlapping a brake disc, a clamping device arranged in the brake caliper for pressing brake pads against the brake disc, two adjusting spindles arranged parallel and spaced apart from each other, with which the clamping device is in operative connection, an adjusting device positioned in the brake caliper, with which a wear-related change in a clearance between the brake pad and the brake disc can be substantially compensated by means of an axial adjustment of the adjusting spindles, and a synchronizing device (7) covered by a cover (9) attached to the brake caliper with a traction drive (5), with which the two adjusting spindles can be adjusted synchronously and which has a traction element with two strands (12), is designed such that a tension spring rests on one strand (12).