Brake Force Transmission Unit Using Screw Roller and Spindle
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Solution Overview
Problem
Existing brake assemblies for vehicles, particularly commercial and hybrid vehicles, face challenges in achieving improved force transfer, kinematics, and manufacturing efficiency, with existing designs often requiring complex components and increased effort for assembly and storage.
Innovation Solution
The introduction of a brake force transmission unit utilizing a screw roller and screw spindle for force transmission between the electrical drive and pushrod, which enhances stiffness, reduces noise, and provides a self-locking effect, allowing for a more stable and efficient transfer of forces while simplifying the design and enabling the use of the same brake sub-assemblies with either pneumatic or electrical drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex brake components and assemblies are used to achieve improved force transfer and kinematics, then the performance and reliability are improved, but the device complexity and manufacturing effort increase
Solution Approach 1:
The brake assembly is divided into modular brake sub-assemblies that can be independently manufactured and assembled. The force transmission unit is segmented into discrete components (screw spindle, screw rollers, bearings) that can be produced separately and then assembled, reducing overall complexity while maintaining performance
Solution Approach 2:
The brake sub-assemblies are designed with universal interfaces and standardized components that allow the same basic design to be used across different vehicle types and brake configurations. The screw mechanism serves multiple functions: force transmission, self-locking, and wear compensation, reducing the need for additional specialized components
2Strength
If traditional force transmission mechanisms are used in brake assemblies, then the design is simpler, but the stiffness and service life are reduced
Solution Approach 1:
Traditional flexible mechanical linkages are replaced with a rigid screw mechanism that provides superior stiffness. The direct threaded engagement between the screw spindle and screw rollers eliminates compliance and backlash, providing a stiffer force transmission path while maintaining a relatively simple mechanical design
Solution Approach 2:
The screw mechanism utilizes composite construction with the screw spindle and screw rollers made from materials optimized for both strength and wear resistance. The combination of hardened threaded surfaces with bearing-supported rotation creates a composite system that achieves high stiffness and extended service life
3Adaptability or versatility
If brake assemblies are customized for different vehicle types and drive configurations, then the adaptability is improved, but the manufacturing and storage costs increase
Solution Approach 1:
The brake sub-assemblies are designed with universal mounting interfaces and standardized force transmission components that can be used across different vehicle types (commercial vehicles, electric vehicles, hybrid vehicles) and different drive configurations. This modular universal design allows the same basic sub-assembly to be adapted to various applications without requiring complete redesign, thereby maintaining manufacturing efficiency while achieving versatility
Solution Approach 2:
The brake assembly design allows for dynamic configuration where the same universal sub-assemblies can be assembled in different arrangements and orientations to suit different vehicle applications. The modular design enables flexible adaptation to various mounting positions and force transmission requirements without sacrificing manufacturing efficiency
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 solution results in improved stiffness and service life of brake components, reduced noise, and the ability to use the same brake sub-assemblies for different vehicle types, lowering manufacturing and storage costs while maintaining performance across various drive types.
Implementation Method 1
a screw roller (20) and a screw spindle (30) which meshes with the screw roller (20)
Implementation Method 2
changing a rotational movement to a translational movement and/or increasing the input force to an output force by a suitable transmission ratio
Implementation Method 3
provides a self-locking effect, allowing for a more stable and efficient transfer of forces
Implementation Method 4
an electrical drive for producing the actuating or input force upon electrical energization
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a brake force transmission unit (3) for a brake system of a vehicle. The invention proposes to use a screw roller (20) and a screw spindle (30) which meshes with the screw roller (20) within the force flow of the brake force transmission unit (3). The use of a screw roller (20) in particular leads to an improved force transfer, a compact design and/or a long life cycle of the brake force transmission unit (3).