1、 本科毕业 设计 外文文献 及 译文 文献、资料题目： Loader Overview 文献、资料来源： 互联网 文献、资料发表（出版）日期： 2012.3.10 院 （部）： 机电 工程学院 专 业： 机械 工程 及自动化 班 级： 机械 姓 名： 学 号： 2 指导教师： 翻译日期： 2012.4.5 山东建筑大学毕业 设计 外文文献 及译文 - 1 - 外文 文献 ： Loader Overview The main function of the loader shovel of loose material and short-distance transport operation
2、s. It is the fastest growing engineering machinery, machine production and sales and market demand one. We usually see the largest wheel loaders, it is acrawler loaders. Crawler than it has good mobility, does not destroy the road surface, easy to operate, etc. Wheel loaders has been widely used. A
3、loader (also known as: bucket loader, front loader, front end loader, payloader, scoop loader,shovel, skip loader, and/or wheel loader) is a type of tractor, usually wheeled, sometimes on tracks, that has a front-mounted square wide bucket connected to the end of two booms (arms) to scoop up loose m
4、aterial from the ground, such as dirt, sand or gravel, and move it from one place to another without pushing the material across the ground. A loader is commonly used to move a stockpiled material from ground level and deposit it into an awaiting dump truck or into an open trench excavation. Loaders
5、 in general by the chassis, powertrain, running gear, working device, steeringbrake, hydraulic system and operating system. The basis of the loader classification is the Society of Automotive Engineers of America (SAE) rated capacity of the bucket. The classification is based on the largest general
6、purpose bucket offered by the manufacturer or the bucket size adopted by the Contractor, whichever is the lesser.The loader assembly may be a removable attachment or permanently mounted. Often the bucket can be replaced with other devices or tools for example, many can mount forks to lift heavy pall
7、ets or shipping containers, and a hydraulically opening clamshell bucket allows a loader to act as a light dozer or scraper. The bucket can also be augmented with devices like a bale grappler for handling large bales of hay or straw. Large loaders, such as the Kawasaki 95ZV-2, John Deere 844K, Cater
8、pillar 950H, Volvo L120E, Case 921E, or Hitachi ZW310 usually have only a front bucket and are called Front Loaders, whereas small loader tractors are often also equipped with a small backhoe and are called backhoe loaders or loader backhoes or JCBs, after the company that first invented them. 山东建筑大
9、学毕业 设计 外文文献 及译文 - 2 - The largest loader in the world is LeTourneau L-2350. Currently these large loaders are in production in the Longview, Texas facility. The L-2350 uses a diesel electric propulsion system similar to that used in a locomotive. Each rubber tired wheel is driven by its own independ
10、ent electric motor. Komatsu-integrated design offers the best value, reliability, and versatility. Hydraulics, powertrain, frame, and all other major components are engineered by Komatsu. You get a 18machine whose components are designed to work together for higher production, greater reliability, a
11、nd more versatility. Komatsu s highly productive, innovative technology, environmentally friendly machines built for the 21st century. Loaders are used mainly for uploading materials into trucks, laying pipe, clearing rubble, and digging. A loader is not the most efficient machine for digging as it
12、cannot dig very deep below the level of its wheels, like a backhoecan. The capacity of a loader bucket can be anywhere from 0.5 to 36 m3 depending upon the size of the machine and its application. The front loaders bucket capacity is generally much bigger than a bucket capacity of a backhoe loader.
13、Unlike most bulldozers, most loaders are wheeled and not tracked, although track loaders are common. They are successful where sharp edged materials in construction debris would damage rubber wheels, or where the ground is soft and muddy. Wheels provide better mobility and speed and do not damage pa
14、ved roads as much as tracks, but provide less traction. In construction areas loaders are also used to transport building materials - such as bricks, pipe, metal bars, and digging tools - over short distances. Front loaders are commonly used to remove snow especially from sidewalks, parking lots, an
15、d other areas too small for using snowplows and other heavy equipment. They are sometimes used as snowplows with a snowplow attachment but commonly have a bucket or snowbasket, which can also be used to load snow into the rear compartment of a snowplow or dump truck. High-tip buckets are suitable fo
16、r light materials such as chip, peat and light gravel and when the bucket is emptied from a height. Loaders bucket characteristics 1.Bucket edge for super-hard wear resistant steel plate up to 500 Brinell hardnessfor long life. 2.Bucket shell and side Brinell hardness of 400 to resist abrasive wear. Installed bythe enhanced treatment of attachment hinge points to reduce Wear and tear.
