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One-minute Starter Loader Working Device In What Form
- Aug 18, 2017 -

Loaders are familiar, except for the common wheel loaders, crawler loaders, backhoe loaders, skid loaders and so on. The main task of loaders is to use their own movement to load and tilt bulk materials, a requirement that creates a unique working device. This paper briefly introduces the form of loader working device, and the slip loader is not discussed because of its relative special.
When it comes to loader working devices, in addition to the overall arrangement, the main thing is to discuss the form of the bucket mechanism, which is because the loader is relying on the moving mechanism to give the loader the kinetic energy to make the bucket into the material heap, therefore, the arm and lifting mechanism are similar, there is not much to discuss.
And the transfer mechanism has a lot of knowledge, although everyone is common is the z-shaped linkage, also known as the reverse six linkage mechanism, but there are many other forms. We know that the early use of hydraulic working device loader is actually a crawler loader, at that time because of the use of crawler tractor as a chassis, subject to a lot of restrictions, usually using the form of a forward-turn 7 link. The so-called forward rotation means that the rocker arm rotates in the same direction as the bucket, reversing the opposite.
After the wheel loader appeared, due to the engine back, the front end of the working device is not constrained, there are many forms of linkage, the common is the transfer of 8 connecting rods. There are some shortcomings in the form of positive rotation, the linkage is difficult to make the bucket move up and down, the need to transfer the cylinder to fit properly, and the mechanism is too complex. Some machines in the bucket to start when the need to turn bucket oil cylinder small cavity into the oil, the strength is obviously not as large cavity into the oil.
So later, a more concise and efficient reversal of six linkage mechanisms, the Z-shaped linkage, became popular. Z-shaped linkage in the bucket oil tank large cavity into the oil when digging bucket, the strength of the larger, but also can be in the moving arm to keep the bucket up and down better. These advantages make the Z-shaped rods have been used in most of the world loaders, and even later crawler loaders Use this form in the rear of the engine.
Of course everything is not absolute, such as Carter in 1999 launched a single arm structure of the 992G loader, due to the use of unusual arm form, the transfer mechanism is also used in the form of the six-link connecting rod to avoid the problem of layout, of course, this form has been optimized to make the bucket parallel movement of the ability to enhance, but also used a larger bucket oil tank, to ensure that the bucket excavation force.
For the backhoe loader, because the engine needs to be arranged in the front end, so that the loader's working device is greatly restricted, some adopt the use of the six-link connecting rod, and some directly to the bucket oil cylinder in the rocker arm and connecting rod. However, the excavation loader is not the main Earth-rock machinery, people on their productivity and efficiency of the request is not high, so the form itself is not too important.
Now there is a special case in the mainstream loader, is Volvo, in addition to the largest model, its loaders are used in the form of positive eight-link, similar to some of the early structural form, the cylinder is arranged in the lower part of the arm, but also the bucket oil tank large cavity into the oil when digging bucket. By the way, there is no use of "x-y-link" in foreign countries, because it is obvious that this kind of expression does not make a good generalization of various structural forms.