Main reducer assembly of swing driving bridge for loader

The utility model discloses a main decelerator assembly used for the loading machine oscillating driving axle and pertains to the engineering machinery, wherein the main decelerator assembly has a casing of the main decelerator; the casing of the main decelerator is an integral structure; the casing of the main decelerator is connected with the main transmission gear pair, a cover unit and a bearing base; the main transmission gear pair of the main decelerator are the double-surface curve gear pair and the outside of the casing of the main decelerator is connected with a supporting sleeve. The decelerator has the advantages that the main transmission gear pair of the main the decelerator assembly adopts the powerful curve the gear pair, thereby improving the ability of the main decelerator to undertake the torque. Under the circumstance of the same axle load and the same general speed ratio, the device greatly improves reliability of the main decelerator. The loading capacity is strong, the structure is simple and reliable, the technology is high and the device is easy to be dissembled for maintenance. The four oil tanks of the bearing enables the lubrication for the main decelerator that is contained in the internal axle cavity to effectively cycle, stabilize the oil pressure and ultimately stabilize the transmission and the make the sealing more reliable. The bearing has a good lubrication effect, thereby improving the service life of the main decelerator.