Tying Machine Feed Motor Dust Suppression
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Solution Overview
Problem
Existing tying machines face issues with dust accumulation affecting the feed motor, foreign matter contamination of actuators, and inaccurate reel rotation detection, particularly when the reel is contaminated.
Innovation Solution
The tying machine incorporates a suppression member to prevent dust from moving from the feed roller to the feed motor side, a brake member to act as a partition between the reel and actuator, and a magnetic or optical detection system to accurately detect reel rotation even when contaminated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a through hole is provided in the cover to transmit rotation from the feed motor to the feed roller, then the feed mechanism can operate, but dust generated from wear can move from the feed roller side to the feed motor side
Solution Approach 1:
The cover is divided into two separate chambers: a first chamber housing the feed roller and a second chamber housing the feed motor, separated by a partition wall. This segmentation isolates the dust-generating feed roller from the feed motor while maintaining operational functionality through controlled connections.
Solution Approach 2:
A rotation transmission mechanism acts as an intermediary, transmitting rotational motion from the feed motor through the partition wall to the feed roller without requiring a direct through-hole connection. This mediator prevents dust passage while enabling mechanical power transmission.
2Device complexity
If the reel and actuator are housed in the same space, then the structure is compact, but foreign matter can affect the actuator
Solution Approach 1:
The housing is segmented into distinct spaces: a reel housing compartment for the reel and a separate actuator housing compartment for the actuator. A partition wall with a through hole and suppression member creates physical isolation between these compartments, preventing foreign matter migration while maintaining compact overall structure.
Solution Approach 2:
The brake member serves as an intermediary component positioned between the reel and actuator. It functions both as a braking mechanism and as a protective barrier that prevents foreign matter from the reel side from reaching the actuator, dual-purpose design that maintains compactness while providing protection.
3Extent of automation
If an optical sensor with reflector is used to detect reel rotation, then rotation detection is possible, but detection accuracy decreases when the reflector is contaminated
Solution Approach 1:
The optical detection system is replaced with a magnetic detection system. A magnet is attached to the reel and a magnetic sensor detects its position and rotation. This substitution eliminates the reflector component that is susceptible to contamination, providing more reliable detection in dusty environments while maintaining automated rotation monitoring.
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
Prevents dust from affecting the feed motor, prevents foreign matter from reaching the actuator, and ensures accurate detection of reel rotation, enhancing the machine's reliability and efficiency.
Implementation Method 1
a magnet configured to rotate integrally with the reel; and a magnetic sensor attached to the housing
Data Source
AI summary
A tying machine disclosed herein includes a feed mechanism. The feed mechanism includes a feed roller that feeds a tying string; a feed motor that rotates the feed roller; a cover disposed between the feed roller and the feed motor, and including a through hole; and a suppression member that suppresses movement of dust from a feed roller side to a feed motor side via the through hole. Another tying machine disclosed herein includes a reel on which a tying string is wound; a brake member that engages with the reel to brake the reel; and an actuator that drives the brake member. The brake member is interposed between the reel and the actuator. Yet another tying machine disclosed herein includes a housing; a reel on which a tying string is wound; a magnet that rotates integrally with the reel; and a magnetic sensor attached to the housing.