Ladder capable of interchanging between steps and oblique plane

Abstract

The invention discloses a ladder capable of interchanging between steps and an oblique plane and relates to the ladder. The ladder comprises a worm (1), a worm wheel (2), a connecting rack bar (3), a connecting bar (4), a pedal (5) and a linkage rod (6); the worm wheel (2) is engaged to the worm (1), the central axis of the worm wheel (2) is connected with the connecting rack bar (3), the connecting rack bar (3) is hinged to the connecting bar (4), and the connecting bar (4) is hinged to each of the pedal (5) and the linkage rod (6). A drive mechanism uses a worm and worm gear drive mode of which the helix angle is smaller than the equivalent friction angle; the ladder plays a role of self-locking so that the ladder is stable in different poses; the whole combination mechanism has advantages of small vibration impact, small inertia force, small noise, long effective drive distance, stable drive, good self-locking performance, high safety and stability, convenience in interchanging, and low cost and so on; the ladder realizes to interchange between steps and the oblique plane and is convenient for wheelchairs and goods to climb up and go down the steps.

Description

technical field [0001] The invention relates to a ladder, in particular to a ladder with interchangeable steps and inclined planes. Background technique [0002] It is difficult for disabled wheelchairs to pass steps or stairs. It is very inconvenient to carry wheelchairs up and down stairs and stairs with the help of multiple people. On the other hand, it is also difficult to transport goods on steps. It is better to slide up and down on slopes or roll wheels to save effort. Contents of the invention [0003] The object of the present invention is to provide a ladder with interchangeable ladders and inclined planes. The connecting rod is driven by the rotation of the worm gear, and the connecting rod is pulled. The pedal sector rotates downward at a certain angle under the pull of the connecting rod, and the ladder starts from the The ladder becomes a flat ladder, which realizes the mutual conversion between the ladder and the inclined plane, which brings convenience ...

AI Technical Summary

Problems solved by technology

[0002] It is difficult for disabled wheelchairs to pass through steps or stairs. It is very inconvenient to carry the wheelchair up and down the stairs and stairs with the help of multiple people. On the other hand, it is also difficult to transport goods on the steps. It is better to slide up and down the slope or roll the wheels to save effort.

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