Pass-Through Transmission Gearing for Rapid Gap Closure
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Solution Overview
Problem
Existing passage devices, such as turnstiles, face challenges in ensuring secure and efficient access control by synchronizing the movement of blocking elements to prevent simultaneous passage by multiple individuals.
Innovation Solution
A transmission device with a drive axle and two active axes of rotation, connected via uneven gear stages, ensures that blocking elements move in a coordinated but differential manner, preventing simultaneous passage by utilizing a gear system where the drive axle's rotation synchronizes the movement of two elements, with one element moving slower than the other to close the gap quickly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blocking elements are moved simultaneously at the same speed, then the movement is simple and synchronized, but multiple individuals can pass through simultaneously reducing security
Solution Approach 1:
The patent applies asymmetry by using two different gear ratios in the transmission device. The first gear ratio and second gear ratio are deliberately made different to create asymmetric movement speeds for the two blocking elements. This ensures that when one blocking element moves, the other moves at a different speed, preventing simultaneous passage by multiple individuals while maintaining a structured gear-based system.
2Reliability
If the second blocking element moves slower, then synchronization is easier to maintain, but the gap closure is insufficient preventing simultaneous passage
Solution Approach 1:
The patent applies dynamics by making the movement speeds of the blocking elements variable rather than constant. The unevenly geared gear stages cause the blocking elements to move at different speeds at different times during the rotation cycle. This dynamic speed variation ensures effective gap closure while the systematic gear arrangement maintains synchronization control.
3Reliability
If a simple rotation mechanism is used, then the device is easy to operate, but it cannot prevent simultaneous passage by multiple individuals
Solution Approach 1:
The patent uses the transmission device with unevenly geared gear stages as an intermediary mechanism between the drive source and the blocking elements. This intermediary gear system translates a single rotational input into differential rotational outputs, enabling effective access control while maintaining a relatively simple overall device structure through mechanical advantage.
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
This solution provides enhanced security by ensuring that only one person can pass through the passage device at a time, as the gear system ensures that the second element closes the gap rapidly, making it difficult for another person to follow simultaneously.
Implementation Method 1
A transmission device (1) with a drive axle (3), a first active axis of rotation (8) and a second active axis of rotation (10), wherein the first active axis of rotation (8) is connected via a first, unevenly geared gear stage (12) to the drive axle (3), wherein the second active axis of rotation (10) is connected via a second, unevenly geared gear stage (13) to the drive axle (3)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a gear device (1) for the discontinuous movement of at least two elements, in particular locking elements (41, 42) of a through-device (40), comprising a drive shaft (3), a first effective rotary shaft (8), designed for torque-transmitting operative connection with the first element, in particular locking element (41), a first, non-uniformly translating gear stage (12) between the drive shaft (3) and the first effective rotary shaft (8), a second effective rotary shaft (10), designed for torque-transmitting operative connection with the second element, in particular locking element (42), a second, non-uniformly translating gear stage (13) between the drive shaft (3) and the second effective rotary shaft (10).