Dual Shift Coupling Radial Groove Spring Support
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Solution Overview
Problem
The existing double shift clutches with non-positively effective clutch units are complex and costly to manufacture due to the need for blind holes and intricate spring arrangements, which complicates the production of the inner body.
Innovation Solution
A radial groove in the inner body accommodates a thrust washer, allowing compression springs to be supported directly on its inner surface, simplifying the production process and eliminating the need for blind holes, while a multi-part thrust washer with a circumferential carrier ring ensures precise alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind holes are used to accommodate compression springs in the inner body, then the springs can be positioned axially, but the manufacturing process becomes complex and costly
Solution Approach 1:
The thrust washer is divided into multiple sections (first and second thrust washer sections) that are assembled separately and then joined together within the radial groove. This segmentation allows the thrust washer to be manufactured more easily and assembled in place, avoiding the need for complex blind hole structures while maintaining precise spring positioning.
Solution Approach 2:
The thrust washer acts as an intermediary component between the inner body and the compression springs. By providing a dedicated support surface on the thrust washer, the springs are positioned accurately without requiring the inner body itself to have complex blind hole structures. The thrust washer mediates the positioning function, simplifying the inner body manufacturing.
2Device complexity
If a one-piece thrust washer is used, then the structure is simple, but assembly and disassembly within the radial groove is difficult
Solution Approach 1:
The thrust washer is segmented into multiple sections that can be assembled separately and then joined together within the radial groove. This allows for easier assembly and disassembly compared to a one-piece structure, while still providing a stable support surface for the compression springs. The segmented design enables the thrust washer to be manufactured and assembled more easily.
3Ease of manufacture
If the thrust washer is positioned radially inside the inner body, then the compression springs can be supported directly, but the radial alignment precision must be high
Solution Approach 1:
The thrust washer serves as an intermediary component that provides a dedicated support surface for the compression springs. By positioning the thrust washer sections radially inside the inner body and joining them with the support ring, a precise and stable support surface is created without requiring high radial alignment precision in the inner body itself. The thrust washer mediates the positioning requirements.
Solution Approach 2:
Instead of requiring the inner body to provide the support surface for the springs, the invention inverts the approach by having the thrust washer provide the support surface. This allows the thrust washer to be precisely positioned and aligned, while the inner body structure remains simpler. The support function is inverted from the inner body to the thrust washer.
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 simplifies the manufacturing process, reduces production costs, and enhances the stability and accuracy of the double shift clutch, making it suitable for industrial applications such as oil extraction pumps, machine tools, and commercial vehicles.
Implementation Method 1
each compression spring arrangement comprises a plurality of compression springs which are located axially on the inside on the Support thrust washer
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a dual shift coupling comprising two operatively connected coupling units, which are mounted on a shared, integrally formed inner body in a rotationally fixed and axially movable manner. The invention further comprises a multi-part pressure disk, which is arranged between the coupling units in an axially fixed manner and is supported by the inner body, and having two axially movable pressure pistons, which can be ventilated by respective pressure spring assemblies arranged in the inner body. According to the invention, a radial notch for accommodating the pressure disk is provided in the inner body, wherein the radial depth of said notch extends at least to radial inner wall segments of recesses for the pressure spring assemblies. Each pressure spring assembly comprises a plurality of pressure springs, which rest on the inner side of the pressure disk relative to the axis. The invention can be used in the manufacture of machine tools.