Linear Actuator Release Assembly for Clutch and Self-Locking Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing linear actuators require complex operation to control both clutch and self-locking devices independently, lacking a comprehensive solution for simultaneous control and efficient retraction resistance management.
Innovation Solution
A linear actuator design incorporating a hand-pull release assembly that integrates a clutch device for power disconnection and a self-locking device with a release torsion spring, allowing for simultaneous control and quick release through a single operation mechanism, featuring a clutch device with a coupling gear sleeve and a self-locking device with friction sleeves and a release torsion spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clutch device and a self-locking device are provided separately in a linear actuator, then the actuator can achieve power disconnection and retraction resistance, but the operation becomes complicated requiring independent control of two devices
Solution Approach 1:
The patent combines the clutch device and self-locking device into a single integrated assembly where one operating handle controls both devices simultaneously. The clutch device includes a clutch sleeve that engages/disengages the transmission worm wheel from the rotary screw, while the self-locking device uses a friction sleeve and torsion spring to provide retraction resistance. Both devices share common operational components (clutch plate, friction plate, torsion spring) that are actuated together through a single handle, resolving the contradiction between having reliable dual-function control and maintaining simple operation.
2Power
If the clutch device disconnects power completely, then power transmission is stopped, but the rotary screw may retract too fast without resistance control
Solution Approach 1:
The patent introduces a self-locking device as an intermediary mechanism between the clutch device and the rotary screw. When the clutch disconnects power transmission, the self-locking device's friction sleeve engages with the rotary screw through a friction connection, providing controlled retraction resistance. The torsion spring maintains constant pressure between the friction sleeve and rotary screw, acting as a mediator that prevents uncontrolled fast retraction while allowing controlled manual operation. This resolves the contradiction by adding an intermediate resistance-control mechanism that operates independently from the main power transmission clutch.
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
Enables convenient operation by controlling both devices through a single hand-pull release assembly, preventing fast retraction and allowing quick release by unlocking the self-locking device, thus enhancing the actuator's functionality and user experience.
Implementation Method 1
a self-locking device, configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and including a release torsion spring configured to unlock the self-locking device
Implementation Method 2
a self-locking device, configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely
Data Source
AI summary
Disclosed is a linear actuator, including a drive motor, a transmission assembly, a rotary screw, a transmission nut, a clutch device, a self-locking device and a hand-pull release assembly. The clutch device is arranged between the transmission assembly and the rotary screw. The self-locking device is configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and the self-locking device includes a release torsion spring. The hand-pull release assembly includes a first driving member connected with the clutch device and a second driving member connected with the self-locking device, and has an initial state and a fully released state. During the process from the initial state to the fully released state, the first driving member drives the clutch device to disconnect power, and the second driving member drives the release torsion spring to extend.