Sewing Machine Workpiece-Moving Device with Decoupled Rotation Drive
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Solution Overview
Problem
Conventional sewing machines face a challenge in quickly shifting the rotation motor, which increases the load on the conveyance device and reduces its capability due to the weight of the rotation motor, leading to deteriorated sewing quality, especially in regions requiring unbalanced stitches.
Innovation Solution
The implementation of a workpiece-moving device that separates the drive unit from the conveyance motor, using a transmission system with a first rail, a second rail, and a linking component to transmit driving force to a rotatable loading table, allowing for independent operation and reduced load on the conveyance device, enabling efficient translation and rotation of the workpiece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotation motor is integrated with the conveyance device, then the workpiece can be rotated during conveyance, but the conveyance device's load increases and shifting speed decreases
Solution Approach 1:
The invention divides the workpiece-moving function into two independent parts: the conveyance device for translating the workpiece and a separate rotation device for rotating it. The rotation device includes its own motor and drive mechanism that operates independently from the conveyance device, allowing each to be optimized for its specific function without bearing unnecessary load.
Solution Approach 2:
The rotation motor and its drive mechanism are extracted from the conveyance device and placed as a separate rotation device. This extraction removes the rotation motor's weight from the conveyance device's load, enabling faster shifting while maintaining the ability to rotate the workpiece during conveyance.
2Adaptability or versatility
If the rotation motor is integrated with the conveyance device, then the workpiece can be rotated, but the drive unit's load increases
Solution Approach 1:
The drive system is segmented into a conveyance drive unit and a rotation drive unit. The rotation drive unit includes the rotation motor, transmission means (gears, belts, or chains), and drive mechanism that operates independently, so the conveyance drive unit only needs to provide force for translation, not rotation.
Solution Approach 2:
The rotation motor and its entire drive mechanism are extracted from the conveyance device's drive unit. This separate rotation device bears the rotational load independently, reducing the conveyance drive unit's load and allowing each drive unit to be sized appropriately for its specific function.
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 allows for high-speed, high-accuracy conveyance and rotation of the workpiece, reducing the influence of the rotation motor's weight on the conveyance process and improving sewing quality by enabling efficient and precise movement of the workpiece during sewing operations.
Implementation Method 1
a linking component that slidably links the first rail to the second rail; to transmit driving force of the drive unit to the loading table to rotate the loading table
Implementation Method 2
a first pulley; and a holding component that links the second rail to the first pulley, to transmit driving force of the drive unit to the loading table to rotate the loading table
Implementation Method 3
a first gear; and a holding component that links the second rail to the first gear, to transmit driving force of the drive unit to the loading table to rotate the loading table
Data Source
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AI summary
Provided is a workpiece-moving device that is installed to a sewing machine without depending thereon, and does not share a drive unit's weight with a conveyance device, and can rotate without any restriction. The workpiece-moving device that translates and rotates a workpiece during operation of a sewing machine, includes a frame to be translated by a conveyance motor, a loading table on which the workpiece is put, the loading table being disposed rotatably to the frame and translated together with the frame, a drive unit that is installed so as to keep unchanged the drive unit's relative position to the sewing machine even when the frame and the loading table are translated by the conveyance motor's driving, and a transmission means to transmit driving force of the drive unit to the loading table to rotate the loading table. Furthermore, another workpiece-moving device includes a frame to be translated by a conveyance motor, a loading table on which the workpiece is put, the loading table being disposed rotatably to the frame and translated together with the frame, and a regulation means to regulate part of movement of the loading table translated with the frame, into movement in a direction different from a direction in which the whole loading table is translated.