Commercial Vehicle Brake Actuation With Variable Transmission Ratio
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Solution Overview
Problem
Commercial vehicle braking systems face space constraints near hubs and wheels, limiting the installation of voluminous systems and requiring extensive space for high transmission ratios of brake forces.
Innovation Solution
A braking system with a transfer element and transformation unit that converts rotatory driving force into translational displacement, allowing adjustable braking force independent of the actuating device, using a motion thread or ball screw spindle with a self-locking mechanism for high transmission ratios and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a high transmission ratio of brake forces is required, then the brake force transmission capability is improved, but the spatial demands increase
Solution Approach 1:
The patent employs a motion thread with variable transformation ratio that dynamically adjusts the conversion of rotatory driving force to translational displacement based on the rotational speed of the second actuation interface. This dynamic adjustment enables high brake force transmission ratios without requiring proportionally large actuator dimensions, thereby resolving the contradiction between force transmission capability and spatial demands.
Solution Approach 2:
The transformation unit alters the transformation ratio of rotatory driving force into translational displacement in accordance with the rotational speed of the second actuation interface. By changing the transformation ratio parameter dynamically, the system achieves high brake force multiplication without requiring a physically large mechanism, thus maintaining compact spatial footprint while delivering high transmission ratios.
2Adaptability or versatility
If the transformation ratio is altered according to rotational speed, then the adaptability of braking force is improved, but the device complexity increases
Solution Approach 1:
The motion thread serves multiple functions: it converts rotatory motion to translational motion, provides self-locking capability to maintain brake force, and dynamically adjusts the transformation ratio based on rotational speed. By consolidating these multiple functions into a single mechanism, the patent achieves adaptable braking force without proportionally increasing device complexity.
Solution Approach 2:
The motion thread automatically adjusts the transformation ratio in accordance with the rotational speed of the second actuation interface without requiring external control mechanisms. The system self-regulates the braking force transformation based on operating conditions, reducing control system complexity while maintaining high adaptability.
3Force
If a motion thread is used for transformation, then the transmission ratio is improved, but the friction losses increase
Solution Approach 1:
The patent replaces traditional multi-stage mechanical gear transmissions with a motion thread mechanism that converts rotatory driving force directly to translational displacement. This substitution reduces the number of mechanical interfaces and potential friction points while achieving high transmission ratios through the threaded geometry, thereby minimizing friction losses.
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
Enables high transmission ratios with low spatial demands, achieving adjustable braking forces and self-locking functionality, suitable for both primary and secondary braking systems in commercial vehicles.
Implementation Method 1
the transformation unit is configured as a motion thread, in particular a screw spindle
Implementation Method 2
a self-locking mechanism for high transmission ratios and compact design
Data Source
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AI summary
The invention relates to a braking system and a vehicle with braking system and in particular relates to 2 such black system and vehicular with black system wherein the break actuation speed is variable. According to an aspect of the invention, disclosed is a braking system for a commercial vehicle, comprising: a transfer element movable between a brake position and a release position, the transfer element being configured to set a wheel braking mechanism in a braking state and to release the wheel braking mechanism in the release position, a first actuation interface configured to receive a rotatory driving force, a second actuation interface configured to receive a rotatory driving force, a transformation unit arranged between the transfer element and the first actuation interface, wherein the transformation unit is configured to transform the rotatory driving force received by the first actuation interface into a translational displacement of the transfer element and a brake force Fb, and to alter the transformation ratio of the rotatory driving force received by the first actuation interface into a translational displacement of the transfer element in accordance to the rotational speed of the second actuation interface.