Transmission Switching Module With Synchronized Tooth Coupling
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Solution Overview
Problem
Existing automatic transmissions face challenges with high component costs and space inefficiency due to the use of planetary gear sets and multi-disk clutches or brakes, necessitating a cost-effective and compact switching module for coupling a drive module to an output module.
Innovation Solution
A switching module with a rotating switching unit that employs a force-fitting and form-fitting coupling mechanism, utilizing a ring-shaped power transfer element with internal and external teeth, and a synchronizer ring with friction surfaces, allowing for compact design and selective gear shifting between the drive and output modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If planetary gear sets and multi-disk clutches or brakes are used in automatic transmissions, then reliable gear shifting is achieved, but component cost and space requirements increase significantly
Solution Approach 1:
The patent extracts the essential gear shifting function from complex planetary gear sets and multi-disk clutches, implementing it through a simplified switching module with a single planetary gear set and a claw coupling mechanism. This extraction maintains the core functionality while eliminating unnecessary complexity and reducing component costs.
Solution Approach 2:
The switching module serves multiple functions: it acts as a clutch, a brake, and a gear selector through a single integrated mechanism. The claw coupling can engage with different coupling parts to achieve various gear ratios, replacing the need for multiple specialized components and reducing overall system complexity.
2Volume of moving object
If a compact switching module is designed with force-fitting and form-fitting coupling, then space requirements are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The coupling mechanism is segmented into distinct force-fitting and form-fitting components. The force-fitting coupling (claw coupling) handles radial forces while the form-fitting coupling (teeth engagement) handles axial positioning and torque transmission. This segmentation allows each component to be optimized independently, reducing overall manufacturing precision requirements while maintaining compact dimensions.
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 solution enables a compact, cost-effective switching module that can be installed in automatic transmissions, allowing for efficient gear shifting and torque transfer while minimizing component costs and space requirements.
Implementation Method 1
a synchronizer ring with friction surfaces
Data Source
AI summary
The invention relates to a switching module for coupling a drive module to an output module in an automatic transmission where the drive module and the output module are rotatably mounted around a common transmission axis. The switching module includes a switching unit rotatably mounted about the common transmission axis and couples with one of the modules in a movable and rotationally fixed manner. The switching unit includes an element for coupling the drive module and the output module in a force-fitting manner and a power transfer element for coupling the drive module and the output module in a form-fitting manner.