Hidden lifting mechanism with anti-falling limiting structure

Abstract

The utility model belongs to mechanical lifting equipment field discloses a hidden lifting mechanism with anti -drop limiting structure, including stand, transmission assembly, lifting cylinder and driving part, transmission assembly includes screw rod and screw thread cover is equipped on the moving link of screw rod outer diameter, moving link top end connects lifting cylinder, still be provided with the limiting piece on the inner wall of stand, transmission assembly still includes extension link, extension link bottom and moving link top end fixed link, extension link top and lifting cylinder fixed link, limiting piece forms the abutment with extension link in horizontal direction, forms the abuttment with moving link top end in vertical direction, the maximum distance of moving link along the axial movement of screw rod is less than the height of screw rod, the utility model can hide transmission assembly, still can limit the maximum height of the ascending of moving block, avoids moving block from the top of screw rod and ejects, separates from screw rod, has guaranteed the use safety of the equipment of waiting for lifting, the utility model is applicable to the industrial production or daily life, is used for the auxiliary equipment of waiting for lifting to lift.

Claims

1. A concealed lifting mechanism with an anti-fall-off limiting structure, comprising a hollow column, a transmission assembly disposed within the column, a lifting cylinder sleeved on the outside of the column, and a driving component for driving the transmission assembly; the transmission assembly includes a lead screw and a moving rod, the lead screw being rotatably disposed within the column, and the driving component being connected to the input end of the lead screw; the moving rod is threaded onto the outer diameter of the lead screw, and the top end of the moving rod is connected to the lifting cylinder; a limiting component is also provided on the inner wall of the column to restrict the movement of the moving rod with the lead screw; characterized in that, The transmission assembly also includes an extension rod, the bottom end of which is fixedly connected to the top end of the moving rod, and the top end of the extension rod is fixedly connected to the lifting cylinder; the limiting member abuts against the extension rod in the horizontal direction and against the top end of the moving rod in the vertical direction; the maximum distance the moving rod can move along the screw axis is less than the height of the screw.

2. The concealed lifting mechanism with an anti-fall-off limiting structure according to claim 1, characterized in that, The limiting component is a U-shaped limiting rod with a limiting groove extending along its axial direction on the extension rod. The U-shaped open end of the limiting rod extends into the limiting groove, and the side wall of the limiting rod abuts against the side wall of the extension rod. The bottom end of the limiting rod abuts against the top end of the moving rod.

3. A concealed lifting mechanism with an anti-fall-off limiting structure according to claim 2, characterized in that, The radial dimension of the extension rod is smaller than the inner diameter of the column. Multiple lateral support rods are also provided at intervals along the circumference of the inner wall of the column. The width of the lateral support rods is adapted to the horizontal distance between the outer contour of the extension rod and the inner wall of the column.

4. A concealed lifting mechanism with an anti-fall-off limiting structure according to claim 3, characterized in that, Both the limiting rod and the lateral support rod are equipped with pulleys that rotate. The column has an opening corresponding to the position of the pulley, and the pulley extends out of the opening and rolls in cooperation with the inner wall of the lifting cylinder.

5. A concealed lifting mechanism with an anti-fall-off limiting structure according to any one of claims 1-4, characterized in that, The driving component is a hand crank; the transmission assembly also includes a bevel gear pair, which is rotatably mounted inside the column. The driven gear in the bevel gear pair is fixedly sleeved on the outer diameter of the lead screw, and the driving gear shaft is connected to the hand crank.

6. A concealed lifting mechanism with an anti-fall-off limiting structure according to claim 5, characterized in that, The column is equipped with a support leg at its bottom. The support leg has an A-shaped structure and includes a first support leg and a second support leg that are fixedly connected. The column is fixed at the intersection of the first support leg and the second support leg.

7. A concealed lifting mechanism with an anti-fall-off limiting structure according to claim 6, characterized in that, The bottom of each of the first and second legs is fixed with a roller with a built-in braking function.

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