Electromechanical Brake Force Booster Compact Gearing
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Solution Overview
Problem
Existing electromechanical brake force boosters are large due to complex gearing arrangements, which hinder compact construction and efficient use of space in vehicle brake systems.
Innovation Solution
A compact electromechanical brake force booster design featuring a gearing arrangement with spur gears and an intermediate gearing stage that includes a spur gear and a coaxial gearwheel, allowing for torque transmission and reversing the direction of rotation to convert rotational movement into translatory movement, along with a clutch for preventing overload and simplifying motor installation, enabling a compact and space-saving construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If complex gearing arrangements are used to convert rotational movement into translatory movement, then the brake force booster can effectively actuate the brake cylinder, but the device size increases and construction space requirements increase
Solution Approach 1:
The patent combines multiple gearing functions into a single integrated unit. The intermediate gearing stage merges torque transmission and rotation direction reversal into one compact assembly, eliminating the need for separate gear trains and reducing overall device volume while maintaining effective brake force generation.
Solution Approach 2:
The patent employs a nested gearing structure where the intermediate gear is positioned coaxially within the existing gear arrangement. This nesting approach allows the intermediate gearing stage to be housed within the same spatial envelope as the primary gears, maximizing space utilization and minimizing the external dimensions of the brake force booster.
2Ease of operation
If multiple gearwheels and intermediate gearings are added to convert rotation to translation, then the actuating device can be effectively driven, but the device complexity increases
Solution Approach 1:
The intermediate gearing stage serves multiple functions simultaneously: it transmits torque from the electric motor to the spur gears, reverses the direction of rotation, and provides mechanical support through its coaxial mounting. This multi-functionality reduces the need for additional separate components, simplifying the overall gearing construction while ensuring effective actuating device operation.
3Volume of moving object
If a compact gearing design with spur gears is used, then construction space is reduced, but torque transmission capability must be maintained
Solution Approach 1:
The patent optimizes the gear tooth parameters and module dimensions to achieve high torque transmission in a compact space. By carefully selecting the tooth profile, pressure angle, and gear ratio of the intermediate gearing stage, the design transmits sufficient torque from the electric motor to the actuating device while minimizing the external dimensions of the gearing assembly.
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
The design achieves a compact construction that reduces space requirements in vehicles while effectively converting rotational energy into translatory movement for brake force generation, enhancing the efficiency and space utilization of brake systems.
Implementation Method 1
The intermediate gearing stage couples the electric motor to the first spur gear and to the second spur gear in torque-transmitting fashion
Implementation Method 2
The gearing has at least one first spur gear and at least one second spur gear. The intermediate gearing stage drives the first spur gear directly and drives the second spur gear via at least one intermediate gear
Data Source
AI summary
The electromechanical brake force booster for a vehicle brake system comprises a drive arrangement for driving at least one actuating device which is designed for actuating a brake cylinder. The drive arrangement has at least one electric motor and a gearing for coupling the electric motor to the at least one actuating device. The gearing comprises at least one second spur gear and at least one first spur gear. Furthermore, the gearing has an intermediate gearing stage. The intermediate gearing stage couples the electric motor to the second spur gear and to the first spur gear in torque-transmitting fashion. The intermediate gearing stage drives the second spur gear directly and the first spur gear via at least one intermediate gear.