Modular Transmission Layout for Precision Surgical Tool Actuation
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Solution Overview
Problem
The precision of transmission mechanisms in surgical tools is often compromised by assembly errors and component tolerance issues, affecting the accuracy of displacement calculations.
Innovation Solution
A transmission device comprising a base body with multiple driving modules, each including a first transmission set with a slide rail and block, a second transmission set with a screw rod and nut, a third transmission set with a worm rod and gear, and a gear set, allowing torque transmission without requiring components to be aligned on the same axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the driving motor, transmission sets, and slide shaft are arranged on the same axis, then the structure is simple, but assembly errors significantly affect precision
Solution Approach 1:
The patent changes the arrangement from a one-dimensional same-axis configuration to a multi-dimensional spatial distribution. The driving motor is positioned at one end of the base body, with transmission sets arranged in sequence along the length of the base body, and the slide shaft positioned at the other end, creating a distributed spatial layout that reduces the impact of assembly errors on transmission precision.
Solution Approach 2:
The transmission system is divided into distinct modular components: driving motor, first transmission set (worm gear and worm rod), second transmission set (gear set), and slide shaft. Each component is independently assembled and positioned, allowing for better tolerance management and reduced cumulative assembly errors compared to a rigid same-axis arrangement.
2Manufacturing precision
If components are assembled with loose tolerance, then assembly is easier, but transmission precision deteriorates
Solution Approach 1:
The base body is designed with pre-formed mounting positions and alignment features for each component. The transmission sets are pre-assembled as modules before being installed in the base body, which facilitates easier assembly while maintaining precision through predetermined alignment references.
Solution Approach 2:
The base body acts as an intermediary structure that provides rigid support and precise positioning for all components. The slide rail and slide block mechanism serve as intermediaries that translate rotational motion to linear motion with controlled precision, isolating the effects of component tolerances.
3Manufacturing precision
If multiple transmission sets are used, then precision is improved, but device complexity increases
Solution Approach 1:
Multiple transmission functions are merged into a single integrated base body structure. The first and second transmission sets are combined in series within the same structural framework, sharing common mounting surfaces and alignment references, which reduces overall system complexity compared to separate independent transmission systems.
Solution Approach 2:
The base body serves multiple functions: structural support, precise positioning of components, and providing the rigid framework for the entire transmission system. The gear set in the second transmission set serves both to transmit motion and to provide mechanical advantage, combining multiple functions in a single component arrangement.
4Stability of the object's composition
If the base body structure is rigid, then stability is improved, but assembly flexibility is reduced
Solution Approach 1:
The rigid base body is designed as a segmented structure with distinct mounting zones and modular component positions. This segmentation allows components to be assembled in a logical sequence from one end of the base body to the other, providing assembly flexibility while maintaining the overall rigidity of the base body structure for operational stability.
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 configuration reduces assembly errors, enhances precision, and improves the overall rigidity and stability of the transmission device, leading to more accurate displacement calculations and enhanced operational stability.
Implementation Method 1
The third transmission set includes a worm rod and a worm gear that mesh with each other
Implementation Method 2
The second transmission set includes a screw rod and a nut movably disposed on the screw rod. The nut is fixed on the slide rail. The third transmission set includes a worm rod and a worm gear that mesh with each other
Implementation Method 3
The first transmission set includes a slide rail and a slide block movably disposed on the slide rail
Data Source
AI summary
A transmission device includes a base body and a plurality of driving modules disposed in the base body. Each driving module includes a first transmission set, a linking member, a second transmission set, a third transmission set, a gear set, and a driving motor. The first transmission set includes a slide rail and a slide block. The slide block is fixed on the base body. The linking member is fixed on the slide rail and has a slide shaft. The second transmission set includes a screw rod and a nut, and the nut is fixed on the slide rail. The third transmission set includes a worm rod and a worm gear meshed with the worm rod. The gear set is connected to the worm rod. The driving motor has a driving shaft connected to the gear set.