Gearbox Torque Transmission Contour Adaptation
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Solution Overview
Problem
Existing transmission devices for rotary and chipping hammers lack efficient spatial adaptation and cost-effective manufacturing methods for torque transmission, particularly in achieving different transmission stages and incorporating additional components or functions.
Innovation Solution
A transmission device with a torque transmission means featuring a first and second torque transmission area with a matching contour, where the partial area between them has a reduced radius, allowing for adaptable torque transmission and enabling simple manufacturing by stamping or milling, and incorporating a sleeve-shaped partial area for additional functionality like switching and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the torque transmission means has a uniform radius structure, then the manufacturing process is simple, but the spatial adaptation to different components is limited
Solution Approach 1:
The torque transmission means is divided into multiple torque transmission areas (first, second, and third areas) with different radial dimensions. The first and second torque transmission areas have a first radius, while the third torque transmission area has a second radius that is smaller than the first radius, creating a segmented radial structure that enables spatial adaptation to different components.
Solution Approach 2:
Different regions of the torque transmission means are assigned different radial dimensions to meet specific transmission requirements. The first and second torque transmission areas use a larger first radius for standard transmissions, while the third torque transmission area uses a smaller second radius to accommodate components with limited radial space, optimizing local transmission characteristics.
2Adaptability or versatility
If additional torque transmission areas are added to enable multiple transmission stages, then the transmission versatility improves, but the manufacturing complexity increases
Solution Approach 1:
Multiple torque transmission areas are integrated into a single torque transmission means component. The first, second, and third torque transmission areas are arranged on the torque transmission means such that they can be manufactured as one piece using conventional methods like stamping or milling, eliminating the need for multiple separate components and reducing assembly complexity.
Solution Approach 2:
The torque transmission means is designed as a multi-functional component that can perform different transmission functions through its various areas. The same component can transmit torque through the first area to a first component, through the second area to a second component, or through the third area to a third component, making it a universal transmission element that replaces multiple specialized components.
3Adaptability or versatility
If the first torque transmission area has a smaller tip circle radius than the second torque transmission area with the same root circle radius, then the spatial adaptation is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The torque transmission means is designed with variable radial dimensions that can be adjusted during the manufacturing process. The first and third torque transmission areas have a first radius while the second torque transmission area has a second radius different from the first radius, allowing the structure to adapt to different spatial requirements. This dynamic dimensional variation is achieved through conventional manufacturing methods like stamping or milling with standard precision capabilities.
Data Source
Figure 1
Figure 2
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AI summary
The invention relates to a gearbox device, in particular, for a hammer drill or chisel, comprising a torque transmission means (12), having a first torque transmitting region (14) for transmission of a torque to a first component (16) and at least one second torque transmitting region (18) for transmitting a torque to a second component (20). According to the invention, the first torque transmitting region (14) and the second torque transmitting region (18) at least partly have a corresponding partial contour (22) for transmitting the torques.