一种防脱起重链

Abstract

本实用新型公开了一种防脱起重链，包含起重链条和防脱起重挂钩，防脱起重挂钩设置在起重链条一端，防脱起重挂钩包含固定钩体和活动钩体，固定钩体上端开有竖直导槽，活动钩体的上端通过矩形条滑动设置在竖直导槽内，竖直导槽上端设置有与矩形条匹配的圆形通孔，活动钩体沿竖直导槽向上滑动至圆形通孔处时能够在圆形通孔内旋转。本实用新型解决了现有技术钩体在失重情况下有脱钩风险的问题。

Claims

1. A breakaway prevention lifting chain, characterized by: It includes a lifting chain and an anti-detachment lifting hook. The anti-detachment lifting hook is set at one end of the lifting chain. The anti-detachment lifting hook includes a fixed hook body and a movable hook body. The upper end of the fixed hook body has a vertical guide groove. The upper end of the movable hook body is slidably set in the vertical guide groove through a rectangular bar. The upper end of the vertical guide groove has a circular through hole that matches the rectangular bar. When the movable hook body slides upward along the vertical guide groove to the circular through hole, it can rotate in the circular through hole.

2. A pick-proof lifting chain as defined in claim 1, characterized in that: The upper end of the fixed hook body has a U-shaped groove arranged in the vertical direction, and one end of the lifting chain is set in the U-shaped groove and fixed in the U-shaped groove by a pin.

3. A pick-proof lifting chain as defined in claim 1, wherein: The fixed hook and the movable hook together form a closed hook structure. The lower end of the fixed hook facing the movable hook is set as a vertical surface, and the lower end of the movable hook facing the fixed hook is also set as a vertical surface. The lower end of the movable hook facing the fixed hook and the lower end of the fixed hook facing the movable hook are slidably set in the vertical direction.

4. The anti-drop lifting chain according to claim 1, characterized in that: The upper end of the movable hook has a groove that matches the thickness of the fixed hook. The two ends of the rectangular bar are fixed to the inner walls of the groove on both sides of the movable hook. When the movable hook and the fixed hook are closed, the long side of the vertical section of the rectangular bar is set in the vertical direction so that the movable hook cannot rotate in the vertical guide groove.

5. The anti-drop lifting chain according to claim 1, characterized in that: The inner edge of the movable hook is provided with reinforcing ribs that protrude to both sides.

6. A pick-proof lifting chain as defined in claim 3, wherein: The height of the vertical surface of the lower end of the fixed hook facing the movable hook is matched with the vertical stroke of the movable hook. When the movable hook slides along the vertical guide groove to the lowest point, the lower end of the movable hook is aligned with the lower end of the vertical surface of the lower end of the fixed hook facing the movable hook. When the movable hook slides along the vertical guide groove into the circular through hole, the lower end of the movable hook is aligned with the upper end of the vertical surface of the lower end of the fixed hook facing the movable hook.

7. The anti-drop lifting chain according to claim 1, characterized in that: A pin is provided on the outer side of the fixing hook body. The diameter of the pin matches the inner diameter of the circular through hole, and one end of the pin is provided with a pin head protruding from the outer side of the pin. A pin fixing groove is fixed on the outer side of the fixing hook body. A U-shaped groove is opened at the upper end of the pin fixing groove, and the width of the U-shaped groove matches the diameter of the pin. The pin body is locked in the U-shaped groove of the pin fixing groove, and the pin head is supported on the upper end surface of the pin fixing groove.

8. A pick-proof lifting chain as defined in claim 7, wherein: The pin is connected to the fixed hook body by an anti-loosening rope.

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