Inter-pipe interlocking device of a single screw mechanical lifting rod

Abstract

An intertube interlocking device of a single-lead-screw mechanical lifting rod comprises a circular-ring-shaped locking base, a left arc-slab-shaped lower support plate and a right arc-slab-shaped lower support plate, the two sides of the locking base are provided with latch hooks on the upper portions and latch hook holes in the lower portions, radial locking cavities are formed in the two sides of the locking base, a locking sleeve is embedded in each locking cavity, a locking shaft is embedded in each locking sleeve, a 90-degree dihedral-angle-shaped cylinder locking groove is formed in the inner side of each locking shaft, a cylindrical locking cylinder is arranged in each cylinder locking groove, a square groove with a notch obliquely facing upwards is formed in the outer side of each locking shaft, a limiting pin perpendicular to the axis of the locking shaft is arranged below the locking shaft in each locking sleeve, a limiting groove is formed below each locking shaft, a torsional spring is arranged between each locking shaft and the corresponding locking sleeve, and a locking groove matched with the corresponding locking cylinder is arranged on the peripheral face of each lower support plate, wherein the section of each locking groove is of a semi-long-strip round shape. The intertube interlocking device can be an axial intertube interlocking device or a radial intertube interlocking device, and collision and damage caused by sudden falling of round tubes ascending at the same time are avoided; the radial intertube interlocking device is a rigid assembly composed of the locking shafts and the locking cylinders, and due to the connection of the rigid assembly, the radial connection process and the after-interlocking effect of the adjacent round tubes are reliable.

Description

technical field [0001] The present invention relates to components of a single-screw multi-tube telescopic mechanical lifting rod, in particular to an inter-pipe interlocking device for a single-screw multi-tube telescopic mechanical lifting rod. Background technique [0002] A mechanical lifting pole with a certain weight-lifting capacity is used to quickly erect antennas or lighting fixtures at high places. [0003] In the prior art, Chinese patent ZL 98 2 38478.5 discloses a single-screw multi-tube telescopic mechanical lifting rod. The mechanical lifting rod has a tube body, a lifting drive device and an interlocking device between the tubes. [0004] The tube body is a plurality of round tubes whose axes are on the same straight line and whose diameters are nested together from large to small. Among the multiple round tubes, the outermost round tube is the bottom tube, and the innermost round tube is the top tube. , the remaining round tubes are inner tubes, the bottom...

AI Technical Summary

Problems solved by technology

[0011] 1. The connecting piece of the interlocking device between the pipes is a straight round rod-shaped radial pin hinged at one end of the lower lever inside the inner pipe and a circular pin hole of the adjacent outer round pipe. The radial pin is inserted into the pin hole by elasticity, so that the adjacent The radial connection process and interlocking of round pipes are not very reliable;

[0012] 2. The interlocking device between the pipes only has the connecting device between the radial pipes connected for lifting. There is no axial connecting device between the adjacent round pipes after the mechanical elevating rod is lowered. When the mechanical elevating rod rises again, the adjacent round pipes Due to the small gap, there will be close contact. This kind of close contact sometimes causes adjacent circular tubes to rise simultaneously due to friction without real connection. Because there is no real connection, after the contact and fit disappear, due to friction The circular tube that rises at the same time due to force will suddenly fall, and the collision caused by the sudden fall will damage the mechanical lifting rod

Images