Brake Adjuster Rotational Clearance Mechanism
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Solution Overview
Problem
Existing brake system adjusters can cause overheating due to axial displacement of actuating elements, leading to tilting and insufficient clearance, which results in constant contact between brake shoes and the drum, and are not compact enough for integration into existing systems.
Innovation Solution
An adjuster design featuring a rotatable adjusting element with a holding unit providing play between engagement areas, allowing specific twisting for clearance without axial displacement, incorporating helical gearing for torque transmission and a one-way clutch for self-reinforcing engagement, reducing the risk of tilting and enabling compact integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If axial displacement of the adjusting element is permitted to provide clearance, then brake clearance is improved, but the adjusting element becomes tilted and stuck, causing overheating
Solution Approach 1:
The invention transitions from axial displacement (linear dimension) to rotational movement (angular dimension) to provide brake clearance. The adjusting element rotates within a bearing about its axis, and the S-cam is rotated about its cam axis, converting the clearance mechanism from linear to rotational domain, thereby eliminating tilting issues while maintaining clearance functionality.
Solution Approach 2:
The invention replaces the traditional axial sliding mechanism with a rotational mechanism. Instead of the adjusting element moving axially along the actuating axis, it now rotates within a bearing. This substitution eliminates the tilting problem inherent in axial displacement while achieving the same clearance objective through rotational movement.
2Reliability
If axial displacement mechanism is used to provide clearance, then brake adjustment is achieved, but the adjuster length and weight increase
Solution Approach 1:
The invention compactifies the adjuster by moving from axial displacement to rotational movement. The bearing allows rotation within a compact radial space, eliminating the need for long axial travel. This dimensional change enables a more compact adjuster design with reduced weight while maintaining full adjustment capability.
3Reliability
If axial displacement is permitted for clearance, then brake shoe clearance is improved, but constant contact occurs leading to hot rotor
Solution Approach 1:
The invention replaces the axial displacement mechanism with a rotational mechanism that eliminates tilting. The bearing-supported rotation ensures the adjusting element remains properly aligned, preventing constant contact between brake shoes and rotor, thereby avoiding the hot rotor condition while maintaining necessary clearance.
4Power
If traditional coupling mechanisms are used for adjustment, then torque transmission is achieved, but device complexity increases
Solution Approach 1:
The invention extracts and eliminates unnecessary intermediate coupling mechanisms from the traditional adjustment system. By using direct rotation about the cam axis and a simplified bearing arrangement, the design achieves torque transmission without the complexity of multiple coupled components, reducing overall device complexity while maintaining power transmission capability.
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 minimizes overheating by preventing tilting and ensuring sufficient clearance through controlled rotation, reduces the adjuster's length and weight, and allows for compact integration into existing brake systems without the need for additional drive systems.
Implementation Method 1
the first holding area engages or can be brought into engagement with a first engagement area of the actuating element in order to transmit a torque about the actuating axis
Implementation Method 2
a helical gear drive is formed between the actuating element and the second engagement area
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to an adjuster for a braking system, in particular a drum brake, comprising an adjusting element (2) and a holding unit (4), wherein the adjusting element (2) is rotatable about an adjustment axis (S) and is secured against displacement along the adjustment axis; the holding unit (4) comprises a first holding region (42) and a second holding region (44); the first holding region (42) can be brought into engagement with a first engagement region (22) of the adjusting element (2) in order to transmit a torque around the adjustment axis (S); the second holding region (44) is fixed directly or indirectly on a housing (5) and is secured against rotation about the adjustment axis (S), and wherein play (3) is provided between the first holding region (42) and the first engagement region (22), within which the adjusting element (2) can rotate relative to the holding unit (4) around the adjustment axis (S).