Linear Actuator Hollow Frame Return Path Noise Reduction
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Solution Overview
Problem
Conventional linear guideways suffer from noise due to level differences at the conjunction of return members, making assembly precise and costly, and increasing manufacturing complexity.
Innovation Solution
A linear actuator design featuring hollow frame half return members and a slide block with integrated rolling grooves and guiding surfaces, forming an endless circulation path without level differences, reducing noise and simplifying assembly by integrating components and eliminating the need for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate return members are coupled together to form the return path, then the return path can be completed, but level difference exists at the conjunction causing noise and requiring precise assembly
Solution Approach 1:
The patent merges the two separate return members into a single integrated return member with a U-shaped cross section. This integration eliminates the conjunction between separate members, thereby removing the level difference that caused noise. The single return member maintains complete return path functionality while avoiding the harmful effects of misalignment.
2Reliability
If two separate return members are coupled together to form the return path, then the return path can be completed, but assembly precision must be very high making assembly more difficult
Solution Approach 1:
By combining two separate return members into one integrated component, the patent eliminates the need for precise alignment and conjunction between multiple parts. The single return member can be installed as one piece, significantly simplifying the assembly process while ensuring complete return path functionality.
3Reliability
If two separate return members are coupled together to form the return path, then the return path can be completed, but manufacturing cost increases
Solution Approach 1:
The patent reduces manufacturing cost by integrating two separate return members into a single component. This eliminates the need for two separate manufacturing processes, two sets of machining operations, and subsequent assembly operations. The single return member can be manufactured more efficiently while maintaining complete return path functionality.
Data Source
AI summary
A linear actuator includes a slide, a first half return member, a second half return member and a slide block. The first and second half return members are hollow frames and sleeved onto the rail. A circulation path can be formed when the first and second half return members and the slide block are assembled together, the second half return member is directly disposed in the first radial gap of the first half return member, and the slide block is directly disposed in the second radial gap of the second half return member. Furthermore, there is no level difference in the first and second return grooves of the two half return members, which will prevent noise caused during movement of the rolling elements, reduce impact of the rolling elements against the circulation path, and therefore extending the life of the linear actuator.