Linear Drive Rigidity via Direct Rotor-Screw Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional linear driving systems suffer from reduced rigidity and increased complexity due to the use of couplings, which also require additional components like lock-nuts, leading to increased space and cost.
Innovation Solution
A linear driving system that omits the coupling and lock-nut by directly connecting the screw shaft and rotor using a spiral part configured as the nut, enhancing rigidity and response speed while reducing costs and assembly space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling is used to connect the motor shaft and screw shaft, then the assembly is secure, but the rigidity of the linear driving system is degraded and response speed is reduced
Solution Approach 1:
The patent removes the coupling component from the system entirely. The motor shaft is directly connected to the screw shaft, eliminating the coupling that was degrading rigidity and response speed while maintaining assembly security through the direct connection.
Solution Approach 2:
The motor shaft and screw shaft are merged into a single integrated structure. This direct connection eliminates the interface between separate components, thereby maximizing rigidity and response speed while maintaining secure assembly.
2Reliability
If a coupling and lock-nut are used to connect the motor shaft and screw shaft, then the connection is secure, but the device complexity increases
Solution Approach 1:
The patent removes both the coupling and lock-nut components from the system. The motor shaft is directly connected to the screw shaft without requiring these additional components, thereby eliminating the complexity of the coupling structure while maintaining secure connection.
3Reliability
If a coupling and lock-nut are used to connect the motor shaft and screw shaft, then the connection is secure, but the space for coupling and whole length of the system increase
Solution Approach 1:
The patent removes the coupling and lock-nut components, eliminating the space they occupy. The direct connection between the motor shaft and screw shaft reduces the overall length of the system while maintaining secure connection.
Solution Approach 2:
By merging the motor shaft and screw shaft into a direct connection, the patent eliminates the additional space required for coupling components, thereby reducing the overall system length and compacting the assembly.
4Reliability
If a coupling is used to connect the motor shaft and screw shaft, then the assembly is secure, but the cost increases
Solution Approach 1:
The patent removes the coupling component from the system. This eliminates the cost of manufacturing, purchasing, and maintaining the coupling while maintaining secure assembly through the direct connection between the motor shaft and screw shaft.
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 system achieves enhanced rigidity, faster response speed, and lower costs by eliminating the need for a coupling and lock-nut, with the spiral part acting as the nut, allowing for easier assembly and maintenance.
Implementation Method 1
The first helical protrusion of the spiral part of the rotor is engaged with the second helical protrusion of the screw shaft
Data Source
AI summary
The linear driving system comprises a motor, a screw shaft and a table. The motor comprises a rotor, a stator and a ball bearing. The stator comprises a shaft part and a spiral part. The shaft part and the spiral part jointly comprise an accommodation space. The spiral part comprises a first helical protrusion formed on the inner surface thereof. The screw shaft is coaxially coupled with the rotor. One end of the screw shaft comprises a second helical protrusion formed on the outer surface thereof, and the screw shaft is accommodated within the accommodation space. The table is fixed on the other end of the screw shaft. The first helical protrusion is engaged with the second helical protrusion. When the rotor is rotated, the rotor drives the screw shaft and the table to move forward or backward linearly in the direction of the axial of the rotor.