A variable-drive self-resetting shape memory alloy wire puller
By designing a variable-drive-force self-recovering shape memory alloy wire pin puller, the problems of insufficient pin pulling force and complex assembly are solved by utilizing the energized contraction characteristics of the shape memory alloy wire and the restoring force of the spring. This achieves increased pin pulling force and automatic recovery, simplifying the assembly process.
CN115674087BActive Publication Date: 2026-05-26AEROSPACE DONGFANGHONG DEV LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AEROSPACE DONGFANGHONG DEV LTD
- Filing Date
- 2022-09-05
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing shape memory alloy wire pin pullers have problems such as low pin pulling force, limited number of wires, inability to automatically recover after use, and complex assembly.
Method used
A self-resetting shape memory alloy wire pin puller with variable driving force was designed. The pin shaft is driven by the energized contraction characteristics of the shape memory alloy wire, and the spring provides the reset force to achieve automatic recovery. The structure is simple and the driving force is adjustable.
Benefits of technology
It improves the drawing force, enables automatic recovery of shape memory alloy wire and simplifies assembly, has strong adaptability, reduces the types of product parts, and improves reliability.
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Figure CN115674087B_ABST
Abstract
This invention provides a variable-force, self-recovering shape memory alloy wire puller, comprising a pin, a housing with a hollow cavity, a movable pull plate, a shape memory alloy wire, a spring, and a fixed pull plate. The pin, housing, movable pull plate, spring, and fixed pull plate are coaxially arranged. The fixed pull plate is fixed within the hollow cavity of the housing. The movable pull plate is installed within the hollow cavity of the housing and slidably engaged with the housing via the pin. The movable pull plate and the fixed pull plate are axially slidably engaged. The pin is fixedly connected to the movable pull plate. The spring is clamped between the fixed pull plate and the movable pull plate. The shape memory alloy wire is wound between the fixed pull plate and the movable pull plate. The advantages of this invention are: improved puller force; variable wire diameter and winding number of times; automatic recovery after use; and simple assembly.
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