Pedrail running gear without thrust wheel

Abstract

The invention discloses a crawler motion device without thrust wheels, and consists essentially of a track frame, a track chain, a guide wheel, a strainer mechanism, a driver mechanism, a speed reducer, a brake, a hydraulic pressure motor, a chain wheel, a connecting board and a sustaining block, and the track chain is directly arranged on the track frame, and is adjusted by the guide wheel and a strainer oil cylinder, the hydraulic pressure motor drives the speed reducer for retarding work, the retarding rotation of the speed reducer is driven by three groups of shaft gears and a secondary satellite gear and the braking of the speed reducer is controlled by the hydraulic pressure motor. The device has reasonable design, compact structure, even stress, convenient operation and using, and flexible motion and turning, reduces the height of the whole device and the number of accessories, improves the stability, reliability, mechanical performance, safety coefficient of a mechanical boring machine and a motion mechanism, is an ideal crawler motion device that fits working in severe environments, and is also applicable for other similar motion mechanisms.

Description

technical field [0001] The invention relates to a crawler-type traveling device without supporting wheels, which belongs to the technical field of design and manufacture of coal mine underground excavation equipment. Background technique [0002] In the underground coal mining operations of coal mines, a large number of roadheaders are used. The structure of the roadheader is mainly composed of a walking mechanism, a cutting mechanism, a loading mechanism, a transportation mechanism, and a hydraulic transmission mechanism. The walking mechanism plays an important role in coal mining operations in harsh environments. It plays a very important role. The forward, backward, steering, pulling and moving of the whole machine are all completed by the walking mechanism. [0003] Most of the traveling mechanism of the roadheader adopts the crawler structure with rollers, which is easy to walk and powerful, and has great advantages in the harsh environment of coal mines. However, the ...

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Problems solved by technology

[0003] Most of the traveling mechanism of the roadheader adopts the crawler structure with rollers, which is easy to walk and powerful, and has great advantages in the harsh environment of coal mines. However, the rollers of the crawler traveling mechanism also have many disadvantages in use. , There are multiple rollers on the lower part of the track frame, and the track chain must be matched and meshed according to the fixed distance of the rollers, which greatly restricts the crawler running mechanism. When excavating, the track supports the machine. The self-weight and cutting mechanism, the horizontal force and vertical force transmitted to the crawler belt are relatively large, and the grounding specific pressure of the crawler belt is distributed in a triangle, which causes a few track shoes to bear a large force, and due to the high cutting The vibration of the machine is relatively large in hard rock formations, and the bearing force of the track shoes is impactful and unstable, and the supporting rollers are in line contact with the track shoes, and the specific pressure is quite large, which can easily cause the track shoes to break. Due to poor drainage in the well, Tracks are often in slime water, which can easily cause damage to the supporting rollers, and it is quite difficult to replace the supporting rollers, which seriously affects the normal operation of the entire machine, and is also prone to failure, increasing unsafe factors

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