Automatic Brake Adjuster One-Way Lock Minimization
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Solution Overview
Problem
The existing automatic brake adjusters experience inconsistency in adjusting the brake lining gap due to the one-way lock mechanism's high rotation angle requirement, leading to over-riding of conical serrations during high-frequency braking operations, resulting in inadequate automatic adjustment.
Innovation Solution
The rotation angle required for the one-way lock mechanism is minimized, allowing it to function with less movement than the conical clutch mechanism, ensuring consistent automatic adjustment by controlling the lining gap through the pinion assembly's one-way lock mechanism, independent of other gear ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotation angle for one-way lock mechanism is large, then the locking is secure, but the automatic adjustment consistency deteriorates during high-frequency braking operations
Solution Approach 1:
The patent changes the rotation angle parameter of the one-way lock mechanism to be smaller than the conical serration override angle. This parameter adjustment ensures that during high-frequency braking operations, the one-way lock engages before the conical serrations can override, maintaining consistent automatic adjustment of the brake lining gap regardless of braking conditions.
2Manufacturing precision
If the rotation angle for one-way lock mechanism is minimized, then the automatic adjustment consistency is improved, but the locking mechanism may become less secure
Solution Approach 1:
The one-way lock mechanism is designed to engage at a smaller rotation angle than the conical serration override angle, creating a preliminary locking action. This ensures that the brake lining gap is adjusted and locked before any potential override by conical serrations during high-frequency braking, thereby maintaining both consistency and reliability.
Solution Approach 2:
The patent creates a dynamic relationship between the one-way lock mechanism and conical clutch mechanism where the locking and unlocking angles are carefully calibrated. The one-way lock engages at a smaller rotation angle and locks securely, while the conical serrations require a larger angle to override, creating a dynamic system that maintains adjustment consistency under varying braking conditions.
3Ease of operation
If the rotation angle for one-way lock is larger than conical serration override angle, then the one-way lock functions properly, but the conical clutch mechanism overrides during high-frequency braking
Solution Approach 1:
The patent inverts the conventional parameter relationship by making the one-way lock rotation angle smaller than the conical serration override angle. This parameter change ensures that the one-way lock mechanism engages first and maintains locking, preventing the conical clutch mechanism from overriding during high-frequency braking operations, thereby ensuring reliable automatic adjustment.
Data Source
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AI summary
The invention relates to an automatic brake adjuster for adjusting the slack between the brake lining and brake drum of a vehicular braking system. The automatic brake adjuster having one way lock mechanism and clutch mechanism along with a control arm arrangement and a pinion assembly, all arranged rotatively relative to each other for automatic adjustment for the slack and only by the control of one way lock. The movement required for the one way lock is such that it is less than the movement required for the clutch mechanism. During the brake operation, the automatic brake adjuster is locking the one way lock mechanism before locking the clutch mechanism.