We are one of the largest and most professional crane manufacturers in China, with total sales of more than 1.6 billion US dollars last year, including sales of 11,000 sets of double-beam and gantry cranes, more than 73,000 sets of single-beam cranes, and more than 100,000 sets of electric hoist and accessories.
We have an advanced, green, whole-industry chain, intelligent manufacturing industrial park, with an investment of 370 million US dollars and more than 4,700 employees, which has been established for more than 20 years.
Integrated electric hoists are designed and manufactured by our company for high-end customers. The products are more lightweight, beautiful, convenient and intelligent, and the price is very advantageous compared with European and American products, so they are widely welcomed by wholesalers and agents all over the world. We sell about 100,000 units of integrated electric hoists every year, and customers are very satisfied with the products. Welcome to order this product.
The function of the traveling system of a crawler crane is to support the body and enable the crane to travel, as well as perform the traveling, forward, backward, and turning movements required for operations. The traveling system of a hydraulic crawler crane includes: lower frame, telescopic hydraulic cylinder, traveling hydraulic motor, planetary reducer; driving wheel, supporting wheel, idler wheel, tensioning wheel (guide wheel), track (commonly known as four wheels and one belt); tensioning mechanism. The four wheels and one belt and the tensioning device are all installed on the track frame.
The structure of the traveling system of a mechanical or electric crawler crane is similar to that of a hydraulic crawler crane. The difference is that the mechanical traveling transmission is driven by the upper mechanical transmission mechanism through the traveling vertical shaft, via bevel gear pairs, and then through left and right sprockets and chains (or reducers) to rotate the driving sprocket, dragging the track to roll. On the horizontal bevel gear and sprocket shaft, there is a dog clutch to control the straight travel and left and right turns of the track.
(1) Lower frame (traveling frame) The lower frame is the connecting component between the rotating platform and the bogie frame (track frame), and its function is to transfer all or part of the body weight through the track frame to the supporting wheels, and then to the ground through the track. The lower frame is composed of the underframe, crossbeam and track frame. The lower frame can be divided into two types: combined and integral. The integral type is widely used due to its good rigidity. For the convenience of transportation, the super-large crawler crane is often designed as a combined type, and there are also designs that are retractable in the transverse direction. The frame can be divided into elastic suspension, semi-rigid suspension and rigid suspension. When the body weight is completely transmitted to the supporting wheels through elastic elements, it is called an elastic frame; when part of the weight is transmitted to the supporting wheels through elastic elements and the other part through rigid elements, it is called a semi-rigid frame; when the body weight is completely transmitted to the supporting wheels through rigid elements, it is called a rigid frame. For crawler cranes with low traveling speed, to ensure operational stability, semi-rigid or rigid frames are usually adopted.
(2) Track The function of the track is to support the entire weight of the crane and ensure that the vehicle has sufficient driving force. The track is composed of dozens of track plates and chain rails and other parts. The structure of the track is basically divided into four parts: the bottom is the supporting surface, the top is the chain rail, the middle is the part that meshes with the driving sprocket, and the ends are the connecting hinges. According to the different structures of the track plates, they can be divided into integral and combined types. The integral track plate has a simple structure, is convenient to manufacture, easy to disassemble and assemble, and is relatively light. Mechanical cranes all use cast steel flat integral track plates. The combined track plate has the advantage of convenient replacement of parts. When a part is damaged, only that part needs to be replaced, without scrapping the entire track plate. At the same time, the combined track has a smaller plate pitch, which can reduce the impact and wear of the track chain on each wheel and increase the traveling speed. Hydraulic crawler cranes all use short rib rolled combined track plates.
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