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Standard loader 940

Loader is a kind of earth-rock construction machinery widely used in highway, railway, construction, hydropower, port, mine and other construction projects. It is mainly used to shovel and load soil, sand, lime, coal and other bulk materials, and also can perform light shoveling operations on ores and hard soil. Different auxiliary working devices can also be used for bulldozer, lifting and loading and unloading of other materials such as wood.

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Loader

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Loader is a kind of earth-rock construction machinery widely used in highway, railway, construction, hydropower, port, mine and other construction projects. It is mainly used to shovel and load soil, sand, lime, coal and other bulk materials, and also can perform light shoveling operations on ores and hard soil. Different auxiliary working devices can also be used for bulldozer, lifting and loading and unloading of other materials such as wood.
In road construction, especially in high-grade highway construction, loader is used for filling and excavation of subgrade works, aggregate and loading of asphalt mixture and cement concrete stockyard. In addition, it can also carry out operations such as pushing soil, scraping the ground and pulling other machinery. Because the loader has the advantages of fast operation, high efficiency, good mobility, easy operation, etc., it has become one of the main types of machinery for earthwork construction in engineering construction.
The digging and loading and unloading operations of the loader are realized by the movement of its working device. The working device of the loader is composed of bucket 1, boom 2, connecting rod 3, rocker arm 4, bucket cylinder 5, boom cylinder 6, etc. The whole working device is hinged on the frame 7. The bucket is hinged with the bucket cylinder through the connecting rod and rocker arm for loading and unloading materials. The boom is hinged with the frame and boom cylinder to lift the bucket. The bucket overturning and boom lifting are hydraulically controlled. Underground loader, busy at both ends, telescopic loader, fork loader, electric loader
When the loader is operating, the working device shall ensure that when the bucket cylinder is locked, the boom cylinder is lifted or lowered, the linkage mechanism will make the bucket move up and down or close to the translation, so as to prevent the bucket from tilting and scattering materials; When the boom is at any position and the bucket rotates around the boom hinge point for unloading, the bucket tilt angle shall not be less than 45 °, and the bucket can be automatically leveled when the boom is lowered after unloading. According to the structural types of working devices of loaders at home and abroad, there are mainly seven types, namely, three bar, four bar, five bar, six bar and eight bar according to the number of components of the linkage mechanism; According to whether the steering of input and output rods is the same, it can be divided into forward and reverse linkage mechanisms. The bucket structure of loader used in earthwork is usually made of low carbon, wear-resistant and high-strength steel plate welded. The cutting edge is made of wear-resistant medium manganese alloy steel. The side cutting edge and reinforcing angle plate are made of high-strength wear-resistant steel. There are four types of bucket cutters. The selection of tooth shape should take into account the factors such as insertion resistance, wear resistance and easy replacement. The tooth shape is divided into sharp teeth and blunt teeth. The tire loader mostly uses sharp teeth, while the crawler loader mostly uses blunt teeth. The number of bucket teeth depends on the bucket width, and the bucket tooth pitch is generally 150-300mm. The bucket tooth structure is divided into two types: integral type and split type. Most small and medium-sized loaders use integral type, while large loaders often use split type due to poor working conditions and severe wear of bucket teeth. The split bucket tooth is divided into two parts: basic tooth 2 and tooth tip 1. After wear, only the tooth tip needs to be replaced.

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