A running positioning device for a double-girder trolley of a crane

Abstract

The invention discloses a crane double-beam trolley travelling positioning device. The crane double-beam trolley travelling positioning device comprises a trolley body, second connecting rods fixedlyconnected to the trolley body are symmetrically arranged on the lower side of the trolley body, and a first connecting rod is further arranged on the lower side of the trolley body and located betweenthe two second connecting rods. A first box body is arranged at the end, away from the trolley body, of the first connecting rod, an electromagnet is arranged on the inner side wall of the first boxbody, and a connecting ring is arranged in the first box body. A plurality of through holes are formed in the connecting ring, pushing rods slidably connected with the through holes are inserted intothe through holes, and fan-shaped blocks fixedly connected with the pushing rods are arranged at the ends, away from the inner side wall of the first box body, of the pushing rods. The crane double-beam trolley travelling positioning device has the advantages that a traditional crane trolley positioning device is improved, a trolley is driven to move through threaded rod transmission, after a motor stops rotating, acceleration is conducted many times to enable the trolley body to be rapidly decelerated to be stopped, and the displacement quantity is small, so that the positioning accuracy of the trolley is improved; and the crane double-beam trolley travelling positioning device is simple in structure and convenient to use.

Description

technical field [0001] The invention relates to the technical field of crane equipment, in particular to a running positioning device for a double-girder trolley of a crane. Background technique [0002] A crane refers to a multi-action hoisting machine that lifts vertically and carries heavy objects horizontally within a certain range, also known as a crane, and belongs to material handling machinery. The working characteristic of the crane is to do intermittent movement, that is, the corresponding mechanisms for the actions of retrieving, moving and unloading in a working cycle work alternately, and the development and use of cranes in the market are becoming more and more extensive. There are many classifications of cranes: "crane", "tower crane", "crane", "crane" and other common names refer to one or several types of cranes. According to the structure, it can be divided into three categories: bridge type crane, cable type crane and jib type crane. There are five categ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings in the prior art, such as: the operation of the existing crane trolley mainly relies on the driving device to drive the wheel device to run on the main beam, and the running speed is determined by the output speed of the driving device and the diameter of the wheel. After running to the pointed position and stopping, the trolley slides for a certain distance under the action of inertia, resulting in poor positioning accuracy. Repeated adjustments are required to make the trolley reach the predetermined position. In addition, the trolley is loaded with heavy inertia, and the operation is unstable, which is not suitable for positioning accuracy. For demanding working conditions, a crane double-girder trolley running positioning device is proposed

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