Middle axle main speed reducer structure assembly for large-tonnage mine truck

Abstract

The invention discloses an intermediate axle main speed reducer structure assembly for a large-tonnage mine truck. The transmission device comprises an input shaft, a driving cylindrical gear, a through transmission shaft sleeve, an input shaft front bearing, an input shaft rear bearing, a driven cylindrical gear, a through shaft, an adjusting ring with an oil seal assembly, an input shaft flange with a locking nut assembly, a driving bevel gear with a bearing seat assembly, a driven bevel gear with a differential mechanism assembly and an intermediate axle speed reducer shell. The cylindrical gear shell and the through shaft bearing belt flange assembly are arranged on the rack; compared with a traditional structure, the whole main reducer assembly is simpler and more compact in structure, the product is more solid and durable, and the main reducer assembly has the advantages of being high in bearing capacity, low in fault rate and high in reliability and well meets the configuration and use requirements of the giant mine truck.

Description

technical field [0001] The invention relates to the technical field of vehicle axles for heavy-duty mining trucks, in particular to a middle-axle main reducer structure assembly for large-tonnage mining trucks. Background technique [0002] As the core component of the internal transmission system of the drive axle assembly, the main reducer assembly plays the role of decelerating and increasing the torque transmitted from the engine and gearbox, and then transmitting it to the wheels on both sides through the half shaft. In addition to the main reducer assembly of the middle axle, it also has the additional responsibility of transmitting the torque to the rear axle through the through shaft at the same time. [0003] With the development of the mining truck industry and the increase in market demand, the tonnage of mining trucks is getting larger and larger. Now, various mining truck manufacturers have designed their giant mining trucks to have a total design weight of near...

AI Technical Summary

Problems solved by technology

The middle axle main reducer assembly with this structure can barely adapt to the matching of middle axles for small-tonnage mining trucks, but it is difficult to meet the layout and matching requirements of middle axles for giant mining trucks. The reasons include: firstly, such For the giant mid-axle for large-tonnage mining trucks, high reliability and low failure rate are the biggest requirements for this type of product. For the traditional mid-axle main reducer assembly, due to the structure of the inter-axle differential and differential lock, etc. Due to the existence of differential grinding between axles and differential lock toothing and other faults that cannot be eliminated, it will inevitably lead to frequent internal faults of the main reducer, and the high reliability requirements cannot be met; secondly, due to the The transmission torque of the bridge main reducer is very large, so it is required that the external dimensions of the product from the core components such as internal gears and bearings to the external shell must be designed very large to meet the load-bearing strength requirements, and for any component , the simpler the structure itself, the easier it is to design and meet the high-strength requirements. On the contrary, the more difficult it is to take care of all aspects of layout, and weak points are prone to appear. Faults always exist, and the complex shape is difficult to open and process, which also increases the cost of mold opening and increases the development cost; the same is true for the design of the external shell. The structure of the intermediate bridge reducing shell and the cylindrical gear shell is difficult to design and process. , it is not easy to meet the high load-bearing requirements. If you have to consider the layout of inter-axle differentials and differential locks during design, it will inevitably increase the complexity of the shell structure and seriously affect its own strength; third, For the traditional middle axle main reducer structure, the bearing spacing of the input shaft assembly is large, the relative position of each component is not compact, the bearing load consumption is large, the service life is short, and the distance between the flange mounting surface is large, which will affect the connecting shaft angle of the transmission system. Affect the chassis layout

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