Transfer case structure and hinge joint type dumper

Abstract

The invention discloses a transfer case structure applied to a hinge joint type dumper. The transfer case structure comprises a case body, an input shaft, a differential mechanism, a rear output gearassembly I, a front output gear assembly I, a rear output gear assembly II, a front output gear assembly II and a front output gear assembly III. The differential mechanism is located on an upmost shaft of a transfer case, and the differential mechanism and the input shaft of the transfer case are coaxial; the input shaft transmits power to the differential mechanism, and the differential mechanism distributes the power to the rear output gear assembly I and the front output gear assembly I; the rear output gear assembly I is engaged with the rear output gear assembly II, and the power is output to a hinge joint body; and the front output gear assembly I is engaged with the front output gear assembly II, and the front output gear assembly II is engaged with the front output gear assembly III, so that the power is output to a front axle. The front and back spatial size of a lowest shaft of the transfer case is reduced, and output from the transfer case to the front axle can be improved;and fixed proportional distribution of the front and back output torque can be achieved.

Description

technical field [0001] The invention relates to a transfer case structure, which belongs to the technical field of transmission. Background technique [0002] Articulated dump truck is a special equipment specially used in harsh working conditions such as rainy, muddy, and rough roads. It has front and rear frames, which are connected by hinged bodies or swing rings. Components such as the cab are supported by the front axle, and the cargo compartment is arranged on the rear frame, which is supported by the middle axle and the rear axle. Such as figure 1 A schematic diagram of the power transmission of an articulated dump truck is shown. Special operating conditions require articulated dump trucks to have excellent driving ability and off-road capability, and most of them are three-axle all-wheel drive. When the cargo compartment is fully loaded, the load capacity of the three axles is basically the same, or the middle and rear axles are slightly higher. The transfer cas...

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Problems solved by technology

[0004] 1. Torque distribution cannot be customized, it can only be front and rear 1:1 output, but according to the gravity distribution of articulated dump trucks, it is better to distribute the front and rear output torque at about 1:2, the most ideal state is according to each The load of the bridge is distributed in the same proportion

[0005] 2. The differential is located on the bottom shaft of the transfer case, and the front and rear outputs are coaxial. There are two problems with this arrangement: a. The size of the front and rear space of the bottom output shaft of the transfer case increases, and the transfer case reaches the front The transmission shaft of the bridge becomes shorter, and the up and down fluctuation of the front axle has a great influence on the angle of the transmission shaft, and the processing of the shorter transmission shaft is difficult and costly; b. The rear output height of the transfer case is low, resulting in the lower part of the hinged body The ground clearance is very low, which affects the passability of the vehicle

[0006] 3. The differential lock adopts toothed differential lock or no differential lock. When the toothed differential lock is applied, there will be certain impact and mechanical damage, and it is required to apply it at low speed or in a static state; if there is no differential lock , it may happen that the tires on both sides of one of the driving axles slip at the same time and the whole vehicle loses its driving ability

[0007] 4. When the vehicle suddenly loses its power source (such as engine flameout) or the main steering pump works abnormally, the vehicle will lose its steering ability or insufficient steering force, which will cause the vehicle to lose control and pose a certain safety hazard

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