Linear Actuator Locking Mechanism for Mobile Frame Remote Operation
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Solution Overview
Problem
Existing solutions for remote operation and locking of mobile frames, such as smoke flaps, often require manual intervention for opening and lack efficient mechanisms for both locking and unlocking, particularly in civil engineering structures like window sashes or door leaves.
Innovation Solution
A device featuring a linear actuator connected by articulated joints between the stationary and mobile frames, with a lock comprising a spring-loaded pawl and a bolt mechanism that automatically locks and unlocks the mobile frame, allowing for remote operation and enhanced stiffness through symmetric force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear actuator is rigidly secured in the stationary frame plane driving the bolting component, then the locking function is achieved, but the mobile frame cannot be leaned out automatically and device complexity increases
Solution Approach 1:
The patent combines the locking function and the leaning-out function into a single integrated device. The linear actuator serves dual purposes: it drives the bolting component for locking and simultaneously leans out the mobile frame through its articulated connection. This eliminates the need for separate mechanisms and manual intervention for opening.
Solution Approach 2:
The linear actuator is designed as a multi-functional component that performs both locking and leaning-out operations. The bolting component is mechanically coupled to the linear actuator such that its movement accomplishes both functions, making the device universal in its operational capabilities.
2Reliability
If the lock has a bolt mechanically controlled by the linear actuator movement in the final section of stroke, then locking in closed position is achieved, but the mobile frame cannot be leaned out and additional propulsion means are required
Solution Approach 1:
The patent merges the leaning-out mechanism with the locking mechanism by articulating the linear actuator between the stationary and mobile frames. The same actuator that controls the bolt also provides the propulsion for leaning out the mobile frame, eliminating the need for additional propulsion means.
3Strength
If the stationary member and mobile member of the lock have the form of C cross-section channels, then stiffness of the lock is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs symmetric C-shaped cross-section channels for both the stationary and mobile members. This symmetric design ensures that operating forces are distributed evenly, improving the stiffness and stability of the lock mechanism while maintaining manufacturability through standardized symmetric profiles.
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 remote leaning and locking of mobile frames with improved stiffness and operational efficiency, allowing for automatic locking and unlocking without manual intervention, suitable for various civil engineering applications.
Implementation Method 1
The mobile member has a spring-loaded pawl, holding the bolt in the extreme outer guide point
Data Source
Figure 1~3
Figure 4~5
AI summary
The device consists of a linear actuator (A) and a lock (B). The linear actuator (A) is connected with a stationary (3) and a mobile (5) articulated joint between a stationary frame (1) and a mobile frame (2) in the plane perpendicular to the axis of inclination of the mobile frame (2) The lock (B) comprises a stationary member (7) and a mobile member (13) secured respectively to both frames (1, 2) and interlocked in the closed position by a bolt (6) controlled mechanically by the linear actuator movement at the final section of its stroke. The bolt (6) of the lock (B) constitutes a pin of the mobile joint (5) moved by the linear actuator (A) in the guide (14) made in the mobile member (13). The mobile member has a spring (14) loaded pawl (15) holding the bolt (6) in the extreme outer point (b) of the guide (14), having also a releasing mandrel (19), which cooperates with the bumper (12) of the stationary member (7) by lifting the pawl (15) and releasing the bolt (6) during the holding down and locking phase of the mobile frame (2) and during mounting the bolt (6) in the socket (11) of the stationary member (7) in the extreme inner point (a) of the guide (14).