Spindle Assembly Offset Bore Design for Ring Spinning Belt Drive
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Solution Overview
Problem
The existing spindle arrangements for spinning or twisting machines require a high design effort and a large number of pressure rollers to ensure efficient tangential belt contact with spindles, leading to increased complexity and costs.
Innovation Solution
A spindle arrangement where only one pressure roller is required for every three or four spindles by strategically offsetting the centers of the spindle bores, allowing the tangential belt to maintain sufficient contact pressure without compromising the spinning process, and allowing for simpler construction and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure roller is assigned to each pair of spindles to ensure reliable tangential belt contact, then the reliability of spindle drive is improved, but the device complexity and number of components increases
Solution Approach 1:
The patent merges the function of multiple pressure rollers into a single pressure roller that serves three spindles. The tangential belt is routed to wrap around the whorls of three spindles in sequence, and one pressure roller presses the belt against all three whorls simultaneously, combining what would traditionally require two separate pressure rollers for two spindles into a single component serving three spindles.
Solution Approach 2:
The single pressure roller performs multiple functions by pressing the tangential belt against the whorls of three different spindles. This multi-functional approach allows one component to replace what would traditionally require multiple separate pressure rollers, reducing overall system complexity while maintaining drive reliability across all spindles.
2Manufacturing precision
If the centers of all spindle bores lie on a straight spindle line, then the manufacturing precision of spindle mounting is improved, but the ease of manufacture decreases due to stricter machining requirements
Solution Approach 1:
The patent introduces asymmetry in the longitudinal positioning of spindle bores relative to the transverse spindle line. The third spindle's bore center is offset longitudinally by 0.5 to 2 mm from the spindle line, breaking the perfect symmetry of having all bore centers on the line. This asymmetric design allows more flexible and easier machining while the tangential belt routing compensates for the offset to maintain proper belt contact with all whorls.
3Device complexity
If the number of pressure rollers is reduced to one for every three spindles, then the device complexity and cost are reduced, but the reliability of belt contact with each spindle may be compromised
Solution Approach 1:
The patent extends the belt path into the longitudinal dimension by routing it to wrap around three spindles in sequence rather than pressing against two spindles side-by-side. This dimensional extension allows a single pressure roller to effectively serve three spindles by pressing the belt at a point where the belt has already wrapped around the first two whorls and is approaching the third, maintaining sufficient contact pressure through the extended belt path.
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 reduces the number of pressure rollers needed by a third or halves them, simplifying the design and construction of the spindle arrangement while maintaining reliable spindle operation, and allows for easier adjustment and use with existing ring spinning machines.
Implementation Method 1
a spring-mounted first pressure roller located between the first and second spindles and pressing the tangential belt against the whorls of the first and second spindles
Implementation Method 2
the tangential belt contacts the whorls of the spindles tangentially. This tangential contact minimizes friction and thus reduces losses
Data Source
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AI summary
The present invention relates to a spindle arrangement for a spinning or twisting machine, in particular a ring spinning machine (1), with a plurality of spindles (11, 31, 32, 33, 31', 32', 33', 34, 35, 36) arranged side by side and driven by a tangential belt (6).The spindle assembly comprises a spindle bank (14) with bores (15) for mounting the spindles (11, 31, 32, 33, 31', 32', 33', 34, 35, 36), a first spindle (31, 31'), a second spindle (32, 32') arranged next to the first spindle (31, 31'), a spring-mounted first pressure roller (41, 41') arranged between the first spindle (31, 31') and the second spindle (32, 32') and pressing the tangential belt (6) against the whorls (13) of the first spindle (31, 31') and the second spindle (32, 32'), and a third spindle (33, 33') arranged next to the second spindle (32, 32'), wherein the centers of the bores (15) of the first spindle (31, 31') and the second spindle (32, 32') lie on a spindle straight line (40).According to the invention, the center point of the bore (15) of the third spindle (33, 33') is spaced apart from the spindle line (40), wherein the center point of the bore (15) of the third spindle (33, 33') and the first pressure roller (41, 41') are located on the same side of the spindle line (40).