Seeing this headline, does everyone have such a feeling? Is this a problem, too? Are the loader cabs not all on the rear frame?
Indeed, the loaders we usually see have cabs on the rear frame, so what's on the front frame? What's the benefit of the rear frame?
Common loaders place the cab on the rear frame
The so-called front and rear frames are due to the loader's use of articulated steering and the frame is divided into two parts. The early loaders were rigid frames, using the car-type steering, that is deflected rear wheel steering. However, the loader's The operating conditions and the car are still very different, too large turning radius makes the loader application can not fully play its role.
Carter 922, with rigid frame
The articulated loader was born in 1953. Wagner of the United States introduced the Scoopmobiles loader. The relative deflection angles of the front and rear frames can reach 20 degrees. However, this articulated structure has not been widely used because of the loading of Wagner. The machine was not very successful, making the value of articulated steering not fully understood. Until 1959, Euclid adopted an articulated structure that allowed the manufacturers to gradually adopt new structural forms and gradually eliminated the rigid frame.
Wagner Scoopmobiles LD5, the earliest articulated loader
However, in the early days, articulated loaders were naturally multifarious. As far as the layout of the cab was concerned, there were also front and rear frames. Some manufacturers used rear panels, while others used front panels. However, cabs were placed in front and rear vehicles. In fact, there is no big difference, but it is generally believed that the driver's cab is better on the front frame of the cab and is very intuitive. The direction of the driver is always the same as that of the bucket. In the late 60s D600 DART The loader not only places the cab on the front frame, it even raises the height of the cab and offsets it to the left. This is for optimum visibility.
DART D600 loader, cab is very exaggerated
Another benefit of having the cab on the front frame is that the cab can be made larger and can be as wide as the frame. If it is arranged on the rear frame, this cannot be done. However, the cab has many disadvantages in the front of course. The most terrible is comfort. The loader, as a construction machine, generally does not use elastic suspension. The front axle is directly connected with the frame, which will transmit various vibrations to the front frame. For the four wheels, the loader rear axle needs Made to swing, this vibration will be slightly smaller. If the cab is arranged on the rear frame, there will be some slight improvement over nothing.
The Liebherr loader used the front cab extensively
Therefore, since the 1990s, as some manufacturers have changed their course, there is no longer a cab with a cab mounted on the front frame of the loader, and the rear cab is also unmatched.
West German Caittleman's loader, also arranging the cab on the front frame
Zettleman's unique controllable hydraulic suspension improves cab comfort
