Shedding Machine Eccentric Adjustment for Loom Heddle Frames
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Solution Overview
Problem
Existing loom technologies face challenges in achieving precise and efficient adjustment of heddle frame amplitude and height due to design constraints and manual adjustment difficulties, particularly with oscillating actuators, limiting adjustment range and requiring high skill levels.
Innovation Solution
A heddle-forming machine with a rotary electric actuator, eccentric system, and adjustable connecting rods, allowing for automated and precise adjustment of the reciprocating stroke through controlled rotation, with locking mechanisms to fix positions and enable amplitude and height adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manually adjustable adapter or bracket is used to change amplitude, then adjustment capability is provided, but adjustment becomes tedious and difficult to achieve precise results
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated motorized system. A motor drives the connecting rod along a guided path, automatically positioning it at the desired amplitude without requiring manual intervention. This substitution of manual mechanical operation with automated motor control directly resolves the contradiction by maintaining amplitude adjustment capability while dramatically improving ease of operation.
Solution Approach 2:
The system performs self-adjustment through automated control. The motorized mechanism automatically positions the connecting rod based on control signals, eliminating the need for operator intervention. The system serves itself by using automated actuation rather than requiring external manual adjustment, thereby resolving the contradiction between having adjustment capability and maintaining ease of operation.
2Adaptability or versatility
If manually adjustable connecting rod position is used for height adjustment, then height adjustment capability is provided, but requires high skill level and many tightening/loosening steps
Solution Approach 1:
The patent replaces complex manual adjustment procedures with automated motorized control. The motor automatically adjusts the connecting rod position for height adjustment, eliminating the need for multiple tightening and loosening steps. This substitution reduces the adjustment procedure from a complex multi-step manual process to a simple automated operation, resolving the contradiction between providing height adjustment capability and reducing procedure complexity.
Solution Approach 2:
The system performs self-adjustment for height by using the motor to automatically position the connecting rod. The automated system eliminates the need for skilled manual intervention and complex adjustment procedures. The system serves itself by automatically completing the height adjustment without requiring operator skill or multiple manual steps, thereby resolving the contradiction between height adjustment capability and adjustment procedure complexity.
3Device complexity
If oscillating actuator is used instead of continuously rotating one, then design constraints are reduced, but adjustment range is limited and maximum load and speed are reduced
Solution Approach 1:
The patent employs a dynamically adjustable system where the connecting rod's position along its guided path can be continuously modified by the motor. This dynamic adjustment capability allows the system to achieve various amplitudes and heights while maintaining full rotational capability. The dynamic positioning of the connecting rod resolves the contradiction by enabling both oscillating and continuous rotation modes, thereby maintaining adjustment range and performance capability while allowing design flexibility.
Solution Approach 2:
The system segments the actuation function between the motor (providing continuous rotation) and the connecting rod (providing oscillating motion through guided movement). This segmentation allows the motor to maintain full rotational capability for performance while the connecting rod's guided path creates the oscillating effect needed for design flexibility. The separation of functions resolves the contradiction by allowing each component to optimize for its specific role without compromising overall capability.
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
Facilitates easy, precise, and automated adjustment of heddle frame travel parameters, reducing errors and tedious manual operations, and enabling a wide adjustment range with improved load and speed handling.
Implementation Method 1
a rotary electric actuator; a controller for controlling the rotary electric actuator
Implementation Method 2
an eccentric system, which includes: a base through which the eccentric system is driven in rotation by the rotary electric actuator about a principal axis perpendicular to the frame axis, and a connecting piece defining an eccentric axis parallel to the principal axis
Implementation Method 3
a lever, which pivots in oscillation about a lever axis to actuate said heddle frame
Implementation Method 4
a connecting rod, which comprises: a first articulated end, through which the connecting rod is coupled to the connecting piece so that the eccentric system and the connecting rod pivot relative to each other about the eccentric axis, and a second articulated end, through which the connecting rod is coupled to the lever
Data Source
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AI summary
A crowd-forming machine (2) comprising: an eccentric system (30) rotating about a main axis (X20); a lever (50); and a connecting rod (40) pivotally coupled to the eccentric system and the lever about eccentric (X41) and connecting rod (X42) axes separated by a connecting rod center distance (R2), the main axis (X20) and the eccentric (X41) axis being separated by an eccentric center distance (R1). To facilitate adjustment of the stroke of a frame of beams actuated by the machine, it includes an adjustment system allowing: an adjustment configuration where the eccentric (R1) or connecting rod (R2) center distance is adjustable, and a locked configuration where these distances are fixed. The machine (2) includes a locking system (80), which allows lever locking and lever release configurations.