Loom Side Frame Offset Bearing Support for Vibration Reduction
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Solution Overview
Problem
Conventional looms experience severe vibrations during weaving, leading to noise issues and disruptions in the weaving process due to the rocking shaft, main shaft, and cloth winding roll being bridged between side frames, which are not adequately supported to mitigate these vibrations.
Innovation Solution
The loom design incorporates offset support parts within the side frames, where the inner ends of the bearings supporting these shafts are positioned more inwardly than the conventional reference point, reducing the length of the shafts and increasing the stiffness of the side frames, thereby minimizing vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rocking shaft, main shaft, and cloth winding roll are bridged between both side frames using support shafts supported on inner walls, then the shafts can be properly positioned and supported, but severe vibrations occur during weaving due to inadequate vibration mitigation
Solution Approach 1:
The patent introduces rubber dampers as intermediary elements between the support shafts and the inner walls of the side frames. These dampers serve as mediators that absorb and dissipate vibrational energy, preventing the transmission of vibrations from the rotating shafts to the side frames. The rubber material provides elastic damping properties that mitigate the harmful vibrations and noise while maintaining the structural support function.
Solution Approach 2:
The patent converts the harmful vibrations generated by the rocking shaft, main shaft, and cloth winding roll into beneficial damping effects. By positioning the support shafts to extend through the inner walls and using the wall thickness as part of the support structure, the system utilizes the inherent mass and damping characteristics of the side frame walls to reduce vibration transmission. The design transforms the potential harm of direct rigid support into a beneficial vibration-mitigating structure.
2Length of moving object
If the support shafts are positioned at conventional reference points on the inner walls, then the shaft length is maximized for proper bridging, but the side frames experience increased vibrations and noise
Solution Approach 1:
The rubber dampers act as intermediary elements that decouple the shaft support function from the vibration transmission path. The dampers are positioned at the interface between the support shafts and the inner walls, allowing the shafts to maintain their required length and positioning while the dampers absorb the vibrational energy before it can propagate to the side frames.
3Device complexity
If the bearings are positioned with inner ends at the reference position on inner walls, then the shaft support is simplified, but vibration-proof characteristics are insufficient
Solution Approach 1:
The rubber dampers are positioned between the bearings and the inner walls, serving as intermediary elements that provide vibration isolation. This arrangement maintains the simplicity of the bearing support structure while adding the necessary vibration-mitigating function through the damping material.
Data Source
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AI summary
A loom includes a loom frame (1) including a pair of side frames (2), and heddle frame guides (12) each attached to each of the side frames (2) and configured to guide up-and-down movement of a heddle frame (11), wherein a rocking shaft (4), a main shaft (16), and a cloth winding roll (15) bridged between both the side frames (2) are supported on each of the side frames via support shafts (16a, 4a and 15a) and the support shafts (16a, 4a and 15a) are supported via bearings (22a, 22b, 22c, 22d and 22e) fitted in support parts provided in at least inner walls (27) of the side frames (2). The inner wall (27) of at least one side frame (2) has, as a reference position (10), a position of a part, which supports the heddle frame guide (12) in a warp direction (E), of an inner surface (9) of the inner wall (27) with respect to a width direction (B) of the loom and at least one support part is formed to be an offset support part at which an inner end in a support position of the bearing is located on a more inner side of the loom frame (1) than the reference position.