Load-Dependent Brake Pressure Valve Adjustment Mechanism
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Solution Overview
Problem
Load-dependent brake pressure valves cannot be used in vehicle trailers with non-spring-loaded axles, as the articulation of the adjusting lever on the axle does not lead to load-dependent twisting of the adjusting lever and thus the adjusting shaft, resulting in an inability to adapt to changed loads without disrupting braking operations, which compromises operational safety.
Innovation Solution
A load-dependent brake pressure valve design featuring a support path with a degree of freedom for the adjusting shaft, allowing manual adjustment via a spring mechanism that generates a restoring force to overcome self-locking, enabling adjustment even during braking without eliminating braking force, and incorporating a torsion spring for compactness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the adjusting shaft is self-locking during braking, then the conversion characteristic remains stable during braking operations, but manual adjustment cannot be performed while braking force is applied
Solution Approach 1:
The manual adjustment element is designed to preliminarily overcome the self-locking force before adjustment is needed. By applying sufficient manual force to rotate the adjusting shaft against the self-locking mechanism, the operator can change the conversion characteristic even during braking operations, then the system stabilizes in the new position.
2Ease of operation
If a complex adjustment mechanism is used to enable manual adjustment during braking, then adjustability is improved, but the device complexity increases
Solution Approach 1:
The manual adjustment element serves multiple functions: it can rotate the adjusting shaft during braking operations, it can be used for initial setup and calibration, and it maintains the self-locking stability when not in use. This multi-functional design avoids the need for separate adjustment mechanisms for different operating conditions.
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 allows for safe and efficient load-dependent adjustment of brake pressure valves on non-spring-loaded trailers, enhancing operational safety and simplifying operation by enabling adjustments without requiring the trailer to be uncoupled from the towing vehicle.
Implementation Method 1
incorporating a torsion spring for compactness and reliability
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a load-dependent brake pressure valve (1) for a vehicle trailer with an unsprung axle. An adjusting lever (5), by means of which an adjusting shaft (3) of the brake pressure valve (1) can be rotated, can be fixed in different adjustment positions relative to a valve housing (2) or a console held on the chassis by means of a fixing device (18). In order to allow manual adjustment of the adjusting lever (5) even when the brake pressure valve (1) is pressurized, despite the self-locking of the transmission mechanism used for adjustment, the connection (6) between the adjusting lever (5) and the adjusting shaft (3) has a degree of rotational freedom (7).Furthermore, the connection between the adjusting lever (5) and the adjusting shaft (3) is made via a spring (9), which, after a change in the adjusting position of the adjusting lever (5) without a corresponding rotation of the adjusting shaft (3), can cause the adjusting shaft (3) to rotate due to its self-locking mechanism once the self-locking mechanism is released. The invention is particularly suitable for use in a trailer of an agricultural vehicle.