Yarn feeding device with impact-resistant protective structure

Abstract

A yarn feeding device with an impact-resistant protection structure includes a base, a movable member, a limiting shaft, and a limiting frame. The base has a housing and a drive module installed inside it. The movable member has at least one yarn-passing hole, is pivotally mounted on the base, and is driven by the drive module to reciprocate. The limiting shaft is disposed on the movable member and opposite to the limiting frame, which has a movable space for the limiting shaft to swing. The swing range of the limiting shaft within the movable space is less than the maximum boundary of the reciprocating swing stroke of the movable member, so that the limiting shaft contacts the inner wall of the limiting frame before the movable member swings to the maximum boundary of the reciprocating swing stroke. This limits the swing amplitude of the movable member and the limiting bearing is subjected to the impact stress generated by the reciprocating swing stroke, thereby reducing the wear of the movable member.

Claims

1. A yarn feeding device with an impact-resistant protective structure, comprising: A base having a housing and a drive module installed inside the base; A movable component, pivotally mounted on the base relative to the drive module, is driven by the drive module to perform a reciprocating swing stroke. The movable component has at least one threading hole for threading yarn. A limiting shaft is disposed on the side of the movable component relatively away from the drive module. A limiting frame is disposed relative to the limiting shaft and has a movable space for accommodating the limiting shaft to swing within it. The swing range of the limiting shaft within the movable space is less than the maximum boundary of the reciprocating swing stroke of the movable component, so that before the movable component reaches the maximum boundary of the reciprocating swing stroke, the limiting shaft first contacts the inner wall of the limiting frame, thereby limiting the swing amplitude of the movable component and subjecting the limiting bearing to the impact stress generated by the reciprocating swing stroke.

2. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, The moving part is made of ceramic, while the limiting shaft and the limiting frame are both made of metal; and the toughness of the limiting shaft is greater than that of the moving part, while the hardness of the moving part is greater than that of the limiting shaft.

3. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, The movable part has a shaft hole at one end that is relatively far from the drive module for the insertion of the limiting shaft. The limiting shaft is fixed in the shaft hole by a tight fit or adhesive and protrudes toward the limiting frame to extend into the movable space.

4. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, It also includes a fixed plate that is locked to the side of the base relative to the movable member, and the limiting frame is formed in a groove on the fixed plate, thereby forming the movable space for the limiting shaft to swing.

5. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, It also includes a fixing plate, which is locked to the side of the base relative to the movable member, and the fixing plate forms a groove at the position opposite to the limiting shaft. The groove has a recessed step to accommodate the limiting frame, thereby forming an active space for the limiting shaft to swing.

6. A yarn feeding device with an impact-resistant protective structure as described in claim 4 or claim 5, wherein, The depth of the active space is greater than the effective length of the limiting shaft extending into the active space, and there is a reserved gap between the depth of the active space and the effective length of the limiting shaft.

7. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, It also includes a fixing plate that is locked to the side of the base relative to the movable member, and the limiting frame is formed in a through opening on the fixing plate so that the limiting shaft protrudes to the outside through the limiting frame.

8. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, The limiting frame has a plate-like structure with a through-hole, which is locked to the side of the base relative to the movable part, so that the limiting shaft protrudes to the outside through the opening.

9. The yarn feeding device with an impact-resistant protective structure as described in claim 1, wherein, The drive module includes an electromagnetic coil, and a magnetic element is provided on the movable part. The magnetic element is located on the side of the movable part facing the drive module. The magnetic element is driven by the magnetic field change generated by the electromagnetic coil, thereby causing the movable part to swing.

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