Surgical Robot Tool Sleeve Support for Load-Stable Chuck Retention
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Solution Overview
Problem
Conventional surgical tool-fixing devices for surgical robots suffer from deformation and reduced durability due to the transmission of large loads, leading to increased maintenance costs, instability, and potential accidents, and are difficult to operate and assemble, especially for users with weak grips.
Innovation Solution
A surgical tool-fixing device that couples the sleeve directly to a holder part rather than a chuck device part, using a first sleeve fastening portion with male threads and a second sleeve fastening portion with female threads, preventing deformation and allowing easy assembly and disassembly, and enabling interchangeable use of various tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sleeve is screw-coupled to the chuck body at a separation distance without a separate support means, then the device complexity is reduced, but the sleeve deforms under large loads causing reduced durability
Solution Approach 1:
A sleeve supporting portion is introduced as an intermediary component between the chuck body and the sleeve. This supporting portion extends from the chuck body and provides a separate support point for the sleeve, preventing deformation under load while maintaining the screw-coupling connection. The intermediary structure distributes mechanical stresses and prevents direct transmission of large loads to the sleeve.
2Device complexity
If the sleeve is supported without a separate support means, then the device complexity is reduced, but the chuck device part deforms reducing its durability
Solution Approach 1:
The sleeve supporting portion acts as a mediator that distributes and reduces mechanical stresses on the chuck body. By providing an extended support structure, it prevents direct transmission of large cutting loads to the chuck body, thereby preventing deformation and extending the service life of this critical component.
3Device complexity
If the sleeve is screw-coupled to the chuck body, then the device complexity is reduced, but external force causes the chuck device part to malfunction
Solution Approach 1:
The sleeve supporting portion serves as a protective intermediary that shields the screw-coupling connection between the chuck body and sleeve from external cutting forces. This separate support structure prevents external forces from being transmitted to the threaded connection, eliminating the risk of malfunction or damage to this critical joint.
4Device complexity
If the operating nut is used to apply tightening force, then the ease of operation is reduced for users with weak grips, but the device complexity is reduced
Solution Approach 1:
The operating mechanism is segmented into two distinct functional parts: the operating nut for clamping/unclamping the surgical tool, and the sleeve supporting portion for supporting the sleeve. This segmentation allows the sleeve to be supported independently without requiring the operating nut to bear both support and clamping functions, reducing the operational torque required and making the device easier to operate.
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 device enhances durability, stability, and ease of operation, reduces maintenance costs, and minimizes the risk of accidents, while allowing for quick tool changes and accurate calibration.
Implementation Method 1
a first sleeve fastening portion (18) formed in a direction facing the sleeve supporting portion (35) of the hollow sleeve body (11) and the sleeve supporting portion (35) is formed with a second sleeve fastening portion (38) to couple with the first sleeve fastening portion (18), wherein the first sleeve fastening portion (18) includes a sleeve male thread portion (182) having a plurality of male threads formed on an outer circumferential surface and the second sleeve fastening portion (38) includes a holder female thread portion (381) formed with a plurality of female threads on an inner circumferential surface
Data Source
AI summary
A surgical tool-fixing device for a surgical robot includes: a sleeve supporting a surgical tool including a shaft; a chuck device part including a chuck body to which the sleeve is coupled, chucks selectively provided inside the chuck body and selectively clamping the shaft to hold the surgical tool, and an operation force applying portion applying operation forces for clamping and unclamping operations of the chucks; and a holder part installing the chuck device part thereon, mounted to a distal end of a robot arm, and including a sleeve supporting portion holding and supporting the sleeve not to shake, wherein the sleeve includes a first sleeve fastening portion formed in a direction facing the sleeve supporting portion of a hollow sleeve body formed with a shaft insertion hole, and the sleeve supporting portion is formed with a second sleeve fastening portion to couple with the first sleeve fastening portion.