Arrangement for supplying oil to a brake

#The present invention relates, according to an aspect thereof, to an arrangement for supplying oil to a brake.

#The invention, according to an aspect thereof, is applicable on working machines within the fields of industrial construction machines in particular wheel loaders. Although aspects of the invention will be described hereinafter with respect to a wheel loader, the invention is not restricted to this particular machine, but may also be used in other heavy working machines, such as articulated haulers, dump trucks, graders, excavators or other construction equipment.

#Working machines, such as articulated haulers, wheel loaders, motor graders, excavators and other construction equipments are often equipped with wet disc brakes in order to provide a sufficient brake capacity and long service intervals. A wet disc brake uses a cooling liquid, usually some kind of oil or oil emulsion, to cool the brake discs in the disc brake. The cooling liquid is provided in a compartment where the brake is mounted, usually in the wheel hubs of the vehicle. The hub is filled with oil such that at least parts of the brake discs are submerged in the oil. The oil is thus in contact with the brake discs and the brake liners and is used to cool the brake, since oil has a better heat conductivity that air, especially in an enclosed brake arrangement.

#The invention will be described in greater detail in the following, with reference to the attached drawings, in which

#FIG. 1 shows a front view of an oil supply arrangement according to the invention,

#FIG. 2 shows a cut side view of an oil supply arrangement according to the invention

#The embodiments of aspects of the invention with further developments described in the following are to be regarded only as examples and are in no way to limit the scope of the protection provided by the patent claims.

#FIG. 1 shows a front view of an oil supply arrangement according to an aspect of the invention mounted on a planetary gear on a vehicle. FIG. 2 shows a split side view of the oil supply arrangement along line A-A mounted in an axle arrangement which may be part of a wheel hub. FIG. 3 shows a split view of an oil pump.

#The oil pump of the oil supply arrangement is mounted on a planetary gear used as a reduction gear on a vehicle. The planetary gear is used on the vehicle to reduce the rotational speed of the incoming drive axle and at the same time to increase the rotational torque. A reduction gear of this type is often mounted in the wheel hub of a vehicle, especially on heavy vehicles used for construction, where high loads are carried at low speeds. Such construction vehicles comprise among others articulated haulers, wheel loaders, motor graders and excavators. These types of vehicles are often used in rough terrain, where a high driving torque but a low speed is of advantage. The highest allowed speed may also be restricted by road traffic regulations. It is therefore advantageous to use a reduction gear to reduce the rotational speed of the drive wheels of the vehicle, and most commonly the reduction gear is mounted in the wheel hub of the vehicle. Generally, it is of advantage to place a reduction gear as close to the end user component as possible in order to minimize the torque requirements on the rest of the components in the drive line.