Combing Machine Nipper Timing Adjustment via External Four-Bar Linkage
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Solution Overview
Problem
Existing combing machines require troublesome adjustments to the gear train inside the gearbox to adjust the opening and closing time of the top nipper, which can lead to dust contamination and reliability issues.
Innovation Solution
A combing machine design that uses a four-bar linkage mechanism with a first and second crank, linked by pins, where the second crank has an adjustable member, allowing the adjustment of the top nipper's opening and closing time outside the gearbox, eliminating the need to access oily gear parts and reducing dust entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gear train inside the gearbox is adjusted to change the opening and closing time of the top nipper, then the timing can be adjusted, but the adjustment becomes troublesome and dust may enter the gearbox deteriorating reliability
Solution Approach 1:
The patent extracts the timing adjustment function from the enclosed gear train inside the gearbox and relocates it to an external adjustable member on the crank. This allows the timing adjustment to be performed outside the gearbox, eliminating the need to open the gearbox for adjustments and preventing dust contamination while maintaining the ability to adjust the top nipper's opening and closing time.
Solution Approach 2:
The patent introduces an intermediary adjustable member that connects to the crank mechanism. This adjustable member serves as a mediator between the drive system and the top nipper, allowing timing adjustments to be made externally without directly accessing the internal gear train, thus protecting the gearbox from dust while enabling easy adjustment.
2Adaptability or versatility
If the gearbox is opened to adjust the gear train, then the timing can be changed, but dust such as cotton fly may enter the gearbox thereby to deteriorate the reliability of driving
Solution Approach 1:
The timing adjustment capability is extracted from the enclosed gearbox environment and placed on an external adjustable member. This extraction allows timing adjustments to be performed without opening the gearbox, thereby preventing dust and cotton fly from entering the gearbox while maintaining full adaptability for timing adjustments.
Solution Approach 2:
The patent implements preliminary protection by providing an adjustable member that enables timing adjustments to be made before any potential dust contamination occurs. By allowing external adjustment, the system prevents the harmful action of dust entry that would occur if the gearbox needed to be opened for timing changes.
3Device complexity
If a gear train is used inside the gearbox for timing adjustment, then the mechanism is compact, but the adjustment becomes troublesome and requires opening the gearbox
Solution Approach 1:
The patent extracts the timing adjustment function from the complex internal gear train and relocates it to a simpler external adjustable member on the crank. This maintains the compactness of the overall mechanism while dramatically improving accessibility for adjustments, as the adjustable member can be accessed without opening the gearbox.
Solution Approach 2:
The patent substitutes the complex mechanical adjustment of the gear train with a simpler mechanical adjustment of the adjustable member on the crank. This replacement maintains the timing control function while eliminating the need to access the complex internal gear train, making adjustments much easier to perform.
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
Enables easy adjustment of the top nipper's operation time without opening the gearbox, improving workability and preventing dust contamination, while allowing precise positioning based on pre-determined data for optimal performance under varying conditions.
Implementation Method 1
a first crank (37) fixed on the nipper shaft (20) for rotation therewith, a second crank (38) fixed on the rotary shaft (27) for rotation therewith, and a link (39) connected between an end of the first crank (37) and an end of the second crank (38) by pins (40, 41), respectively. The first crank (37), the second crank (38) and the link (39) cooperate to form a four-bar linkage
Implementation Method 2
a position at which the second member (43) is fixed to the first member (42) is adjustable
Data Source
Figure 1A~1D
Figure 2~3B
Figure 4A~4B
AI summary
The combing machine includes a nipper shaft, a nipper frame, a bottom nipper, a nipper arm, a top nipper, a rotary shaft, an eccentric member and a supporting member. The combing machine is characterized in that a first crank is fixed on the nipper shaft for rotation therewith and a second crank is fixed to the rotary shaft for rotation therewith. In addition, a link is connected between an end of the first crank and an end of the second crank by pins. The first crank, the second crank and the link form a four-bar linkage. Further, the second crank has a first member and a second member. Further, the first member'has a hole through which the pin is inserted. Further, the second member is fixed on the rotary shaft for rotation therewith. Further, a position at which the second member is fixed to the first member is adjustable.