Self-locking extension working platform of lifting working ladder

Abstract

The invention provides a self-locking extension working platform of a lifting working ladder, wherein the extension working platform has self-locking function. The self-locking extension working platform of the lifting working ladder consists of a fixed platform, an extension platform and a sprocket-wheel screw stem self-locking device; the extension platform is arranged in the fixed platform; the sprocket-wheel screw stem self-locking device is arranged on the fixed platform; a fixed protection fence is arranged on the fixed platform; and a mobile protection fence is arranged on the extension platform; in a high-altitude operation, in particular to the maintenance for facilities arranged at the positions difficult to approach, and the extension platform can be located at any position. The improvement of the self-locking extension working platform of the lifting working ladder is that the sprocket-wheel screw stem self-locking device is additionally arranged, therefore, the extension platform can be located at any position in moving and can fast, accurately and safely approach the positions difficult to approach to maintain the facilities.

Description

technical field [0001] The invention relates to an elevating workbench, in particular to a self-locking extension workbench of an elevating workladder. Background technique [0002] Civil and military aircraft, airports, docks, factories, warehouses, etc. need to maintain their facilities during use. For higher parts, especially some difficult-to-access parts, it is difficult to meet the maintenance requirements with ordinary lifting work platforms. Existing lifting work platform is made up of car, lifting mechanism, control system and extended work platform. The extended working platform is set above the lifting mechanism, which is set on the car; the lifting mechanism can be a fork type lifting mechanism, an oil cylinder type lifting mechanism or a screw drive pair type lifting mechanism; the car can be a trolley with a draw bar, or a Battery cars or other powered cars; existing extended work platforms include fixed platforms and extended platforms. By jogging the electr...

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Problems solved by technology

[0003] After investigation, before the present invention appeared, China's patent (application publication number: CN 101125633A) "Aerial Work Platform with Extendable Work Platform" (public date: 2008.2.20) solved the connection problem between the fixed fence and the movable fence , but the positioning problem of the extension platform during the moving process has not been well resolved. Only when the extension platform is fully pushed out, the hook on the push handle is inserted into the positioning hole to realize the positioning of the extension platform. Because it is positioned by the opening, the extension platform During the moving process, the positioning can only be realized at the position of the opening, not at any position, and the holes need to be aligned to insert the pin into the hole, which is very inconvenient to insert. It is difficult to push the extension platform closer with this working method Due to the effect of inertia, it is possible to push over the position and damage the facility if you are not careful, but it cannot be guaranteed to be in its positioning position when it is pushed in place. It is necessary to repeatedly move the car body and adjust the position of the extension platform to achieve both push in place and The effect of being able to locate it, such a working method is not safe, and it is time-consuming and labor-intensive to use

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