Multistage Electric Cylinder Structure for Compact Waterproof Stroke
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Solution Overview
Problem
Existing single-stage electric cylinders often fail to meet requirements in situations with limited installation space, particularly in terms of drainage and waterproofing.
Innovation Solution
A multistage electric cylinder design that includes a cylinder barrel and a linear motion component with multiple screw rods and protective tubes, along with a sensor system and a reduction gearbox, to enhance drainage and waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-stage electric cylinders are used, then the structure is simple, but the installation space requirement is large and waterproofing is insufficient
Solution Approach 1:
The patent employs a telescopic multistage cylinder barrel structure where the second cylinder barrel is nested within the first cylinder barrel. This nesting arrangement allows the cylinder to collapse into a compact form for storage or transport while extending to full length for operation, thereby significantly reducing the installation space requirement while maintaining the necessary stroke length.
Solution Approach 2:
The cylinder barrel is divided into multiple stages (first cylinder barrel and second cylinder barrel) that can independently move relative to each other. This segmentation enables the cylinder to achieve its full extended length through coordinated movement of segments, reducing the retracted length and overall space occupation while maintaining functional performance.
2Device complexity
If single-stage electric cylinders are used, then the structure is simple, but the waterproofing effect is insufficient
Solution Approach 1:
The nested multistage cylinder barrel structure creates multiple sealing interfaces between the first and second cylinder barrels. Each interface can be equipped with sealing elements, thereby enhancing the overall waterproofing capability through multiple barriers rather than relying on a single sealing point.
Solution Approach 2:
The patent introduces a vertical arrangement of multiple cylinder barrels stacked along the axial direction. This dimensional transformation from a single horizontal cylinder to a vertical multistage configuration allows for multiple sealing planes, improving waterproofing by distributing sealing requirements across multiple dimensions and locations.
3Volume of moving object
If multistage electric cylinders are used, then the installation space is reduced, but the device complexity increases
Solution Approach 1:
The nested configuration allows the multistage cylinder to collapse into a compact form when retracted, minimizing the installation space requirement. The telescopic design ensures that when not in use, the multiple stages are contained within each other, presenting a small footprint that fits space-constrained applications.
Solution Approach 2:
The cylinder employs dynamic movement between extended and retracted states through the coordinated action of multiple screw rods and cylinder barrels. This dynamic capability allows the structure to adapt its length according to operational requirements, providing space efficiency when retracted while maintaining full functional length when extended.
4Reliability
If multistage electric cylinders are used, then the waterproofing effect is improved, but the device complexity increases
Solution Approach 1:
By transforming the cylinder structure from a single-stage horizontal configuration to a multistage vertical arrangement, the patent creates multiple sealing planes along the axial direction. This dimensional change distributes the waterproofing function across multiple locations and orientations, enhancing reliability while the modular nature of the stages helps manage the increased structural complexity.
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 multistage electric cylinder effectively addresses space constraints and improves waterproofing, enabling high-precision linear motion while extending the service life and reliability of the device.
Implementation Method 1
The linear motion component is axially movable in the cylinder barrel and includes a first screw rod; a second screw rod which is sleeved on the first screw rod
Data Source
AI summary
The present disclosure discloses a multistage electric cylinder. The multistage electric cylinder includes a cylinder barrel, a linear motion component. The linear motion component is axially movable in the cylinder barrel and includes a first screw rod; a second screw rod which is sleeved on the first screw rod; a screw rod nut which is installed on the second screw rod; an immovable tube which is coaxially fitted on an outer side of the first screw rod and an outer side of screw rod nut; a first protective tube which is coaxially fitted on an outer side of the immovable tube and moves along an axial direction of the immovable tube; and a second protective tube which is coaxially fitted on an outer side of the first protective tube and moves along an axial direction of the first protective tube.