Rack Gear Conveying Device Tow Hook Meshing Mechanism
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Solution Overview
Problem
Conventional rack gear conveying devices experience issues with the leading gear tooth failing to mesh smoothly with the pinion gear due to inertia-induced separation of the towed hook from the drawing-in claw, leading to potential breakage and operational problems.
Innovation Solution
The design incorporates a towed hook with an advance preventing claw portion that sandwiches the drawing-in claw, ensuring the towed hook is drawn in at a fixed speed and position, preventing forward advancement and facilitating smooth meshing of the rack gear with the pinion gear, even under varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the towed hook is allowed to move freely under inertia, then the rack gear can engage with the pinion gear, but the towed hook may separate forward from the drawing-in claw causing gear tooth breakage
Solution Approach 1:
The advance preventing claw portion is designed to preemptively counteract the harmful forward movement of the towed hook by engaging with the drawing-in claw before inertia can cause separation. This preliminary anti-action prevents the harmful effect from occurring in the first place, ensuring reliable meshing while preventing gear tooth breakage.
Solution Approach 2:
The advance preventing claw portion acts as an intermediary element between the towed hook and the drawing-in claw. It mediates the interaction by providing a controlled engagement mechanism that allows the towed hook to be drawn in reliably while preventing excessive forward movement that would cause separation and gear tooth breakage.
2Reliability
If the towed hook is constrained to prevent forward movement, then gear meshing reliability improves, but the drawing-in mechanism becomes more complex
Solution Approach 1:
The towed hook is segmented into functionally distinct portions: the hook portion for engaging the drawing-in claw and the advance preventing claw portion for controlling forward movement. This segmentation allows each portion to perform its specific function independently, achieving reliable position control while maintaining a relatively simple overall structure that integrates smoothly with the existing drawing-in mechanism.
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 configuration ensures reliable and smooth introduction of the leading gear tooth between the rack and pinion gears, preventing breakage and ensuring consistent operation by controlling the position and movement of the towed hook relative to the drawing-in claw.
Implementation Method 1
a rack gear (9), attached in parallel to a travel direction of the conveying traveling body (1), and driving pinion gears (16A and 16), meshing with the rack gear (9)
Implementation Method 2
the leading towed hook may consequently move in advance so as to separate forward from the drawing-in claw or the one gear tooth of the pinion gear due to inertia when thrust is received impactingly
Data Source
AI summary
A conveying device drivable by rack gear has a towed hook further forward than a front end of a rack gear mounted to a conveying traveling body. A driving pinion gear, disposed at an entrance of a rack gear drive section, has a drawing-in claw that engages the towed hook and draws in the conveying traveling body to a position where the front end of the rack gear meshes with the driving pinion gear. The towed hook has, at a position at a rear side of a hook portion at a distal end thereof and further forward than the front end of the rack gear, an advance preventing claw portion disposed continuous thereto that, together with the hook portion, sandwiches the drawing-in claw, and the hook portion has a length such that it enters more deeply inside a rotation locus of the drawing-in claw than the advance preventing claw portion.