Linear Actuator Hand-Pull Release for Clutch and Self-Locking Control
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Solution Overview
Problem
Existing linear actuators require separate operation of clutch and self-locking devices, making the operation more complicated and inconvenient.
Innovation Solution
A linear actuator with a hand-pull release assembly that integrates the operation of both the clutch device and the self-locking device, allowing for simultaneous control through a single hand-pull mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate clutch device and self-locking device are provided in the linear actuator, then the functional completeness is improved, but the operation complexity increases
Solution Approach 1:
The patent combines the clutch device and self-locking device into a single integrated assembly that can be operated simultaneously through one hand-pull release mechanism. The release assembly includes a release rod that connects to both the clutch fork (for disengaging the clutch) and the self-locking release structure, allowing both functions to be activated by a single pulling action rather than requiring separate operations for each device.
2Ease of operation
If clutch device disconnects power completely, then the reverse push capability is improved, but the retraction speed becomes uncontrolled
Solution Approach 1:
The self-locking device acts as an intermediary between the clutch device and the rotary screw. When the clutch disconnects power transmission, the self-locking device remains engaged and provides frictional resistance through its friction sleeve and torsion spring mechanism. This intermediary function allows the rotary screw to be manually rotated in reverse while controlling the retraction speed, preventing uncontrolled rapid movement.
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 integrated hand-pull release assembly simplifies the operation of the linear actuator, allowing for convenient control of both the clutch and self-locking devices, thereby preventing rapid retraction and enabling quick release.
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.