Spindle Unit Hysteresis Brake Same-Axis Coupling
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Solution Overview
Problem
The existing spindle units for supplying threads to looms, particularly those using hysteresis brakes, have high manufacturing costs due to a large number of parts and are prone to damage when heavy bobbins are attached, requiring careful handling to avoid impact loads.
Innovation Solution
A spindle unit design where the spindle part and hysteresis brake are arranged on the same axis, with a support shaft connecting them, reducing the number of parts and using a coupling member and regulating member to prevent direct impact on the hysteresis brake during bobbin attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotating shaft of the spindle part and the rotating shaft of the hysteresis brake are coupled by a gear, then the hysteresis brake can apply brake torque to the spindle part, but the number of parts increases and manufacturing cost becomes high
Solution Approach 1:
The patent merges the spindle part and hysteresis brake onto the same axis, eliminating the need for gear coupling. The spindle part is directly supported by the rotating shaft of the hysteresis brake, reducing the number of parts while maintaining the brake torque application function.
Solution Approach 2:
The rotating shaft of the hysteresis brake serves dual functions: it acts as both the brake component and the support shaft for the spindle part. This multi-functionality eliminates the need for separate gear mechanisms and support structures.
2Device complexity
If the spindle part and hysteresis brake are arranged on the same axis, then the number of parts is reduced, but the bobbin may collide against the hysteresis brake during attachment causing impact damage
Solution Approach 1:
The patent introduces a cushioning member (elastic element) between the spindle part and the hysteresis brake. This cushioning member absorbs impact loads during bobbin attachment, preventing damage to the hysteresis brake while allowing the simple same-axis arrangement.
Solution Approach 2:
The cushioning member acts as an intermediary element that mediates between the spindle part and the hysteresis brake. It transmits axial movement while absorbing impact forces, protecting the hysteresis brake from direct collision during bobbin attachment.
3Ease of operation
If the bobbin is held in hand and inserted into the rotating shaft for attachment, then the worker can control the attachment process, but the heavy bobbin (about 10 kg) may cause impact load and require careful handling
Solution Approach 1:
The cushioning member is pre-installed between the spindle part and hysteresis brake to absorb impact loads during manual bobbin attachment. This allows workers to handle the heavy bobbin more easily while the cushioning member prevents damage to the hysteresis brake.
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 design simplifies the structure, reduces manufacturing costs, and prevents damage to the hysteresis brake by transmitting impact loads to the stationary frame, ensuring reliable operation and reduced thread vibrations during thread supply.
Implementation Method 1
The brake part of the spindle unit is, e.g., a hysteresis brake, and gives tension to the thread pulled out from the bobbin by braking the rotating shaft of the spindle part.
Data Source
AI summary
This invention includes an annular hysteresis brake (34) having one end fixed to a stationary frame (11), a support shaft (6) extending through a hollow portion of the hysteresis brake (34), and a spindle part (4) rotatably supported by the support shaft (6). The hysteresis brake (34) includes a yoke (36), a cylindrical hysteresis member (46) inserted into an annular space (41) of the yoke (36), and a hub (37) for rotatably supporting the hysteresis member (46). The spindle part (4) is supported by the support shaft (6) such that the spindle part (4) is restricted from moving toward the hysteresis brake (34) by a sleeve (15). The spindle part (4) and hub (37) are coupled with each other so as to rotate together via pins (21). This invention can simplify the structure while preventing damage to the hysteresis brake, thereby reducing the manufacturing cost of a thread-supplying spindle unit.