D-Shaped Locking Shaft for Gear Train Engagement
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Solution Overview
Problem
Existing gear train locking devices require significant force to engage or disengage, especially when under load or while the gear train is moving, and often necessitate the elimination of rotational load for disengagement, which is inefficient and difficult to manage.
Innovation Solution
A gear train locking device utilizing a D-shaped locking shaft that rotates between engaged and disengaged positions through sliding contact with curved surfaces on the gear, allowing easy engagement and disengagement under load without the need for a clutch, by creating or removing physical interference with the gear train components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional locking devices are used, then the gear train can be locked, but significant force is required to engage or disengage the locking device
Solution Approach 1:
The locking shaft employs a D-shaped cross-section with curved surfaces that interact with corresponding curved surfaces on the gear. This curvature allows the locking shaft to rotate smoothly between engaged and disengaged positions, reducing the force required compared to traditional flat or rigid locking mechanisms.
Solution Approach 2:
The locking device enables dynamic engagement and disengagement while the gear train is rotating and under load. The locking shaft can be rotated into and out of engagement positions without requiring the gear train to be stationary or the load to be removed, making the system adaptable to changing operational conditions.
2Reliability
If traditional locking devices are used, then the gear train can be locked, but the locking device requires elimination of rotational load for disengagement
Solution Approach 1:
The locking shaft is designed to engage and disengage dynamically while the gear train is rotating. The D-shaped cross-section allows the locking shaft to rotate into engagement with the gear's curved surfaces during rotation, and to be rotated out of engagement while the gear train continues to rotate, eliminating the need to stop the gear train for shifting operations.
Solution Approach 2:
The locking shaft can be pre-positioned and engaged while the gear train is already rotating and under load. The design allows engagement to occur during normal operation without requiring preliminary shutdown or load removal, maintaining continuous productivity.
3Reliability
If traditional locking devices are used, then the gear train can be locked, but the device complexity increases due to additional components like clutch
Solution Approach 1:
The patent removes the clutch component from the system by designing a locking mechanism that can engage and disengage without it. The D-shaped locking shaft directly interacts with the gear's curved surfaces, eliminating the need for intermediary clutch components and simplifying the overall device architecture.
Solution Approach 2:
The locking shaft serves multiple functions: it locks the gear train when engaged, allows dynamic shifting during rotation, and eliminates the need for separate clutch mechanisms. This multi-functionality reduces the total number of components required in the system.
Data Source
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AI summary
A gear train locking device having a locking device is provided. The gear train locking device includes a locking shaft 126 having an outside diameter 128 and a shaft axis. The locking shaft rotates about the shaft axis. Rotation of the locking shaft selectively moves the locking shaft between an engaged position and a disengaged position. The engaged position places the outside diameter of the locking shaft into engagement with at least one gear 110 to provide physical interference between the locking shaft and the gear to change the rotational motion of at least one of the gears. Another embodiment includes a locking shaft that cooperates with a plurality of gears.