A rear case-type gear chamber assembly for easy disassembly and assembly of an idler gear assembly

Abstract

The invention relates to a rear box-type gear chamber assembly for easy disassembly and assembly of the idler gear assembly. The gear chamber is installed on the engine body. The idler gear shaft is loaded into the gearbox from the lower part of the gear chamber, and the idler gear shaft disassembly window is provided on the rear end surface of the gear chamber corresponding to the installation position of the idler gear, which is used to facilitate the disassembly and assembly of the idler gear positioning and fixing components from the idler gear shaft The window is installed, and there is a disassembly window cover outside the disassembly window of the idler gear shaft, which can easily solve the problem that the idler gear cannot be disassembled, and can realize the convenient installation and fixing of the idler gear. , without dismantling the gear chamber, it can be completed through the disassembly window of the idler gear shaft, which provides convenience for overhauling the idler gear.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to a rear box-type gear chamber assembly that can realize convenient installation and fixing of idler gears. Background technique [0002] The gear train is an important component of the diesel engine, and the crankshaft gear is the driving gear of the gear train, which drives the gas distribution mechanism, high-pressure oil pump, air compressor and other accessories. Performance, adaptability of the whole machine, disassembly and maintenance and other aspects. Especially with the improvement of the power and emission level of the diesel engine, the requirements for the optimal design of the entire gear train are getting higher and higher, and a reasonable gear chamber assembly can facilitate the disassembly and fixing of the gear train to the greatest extent. [0003] At present, the gear trains of domestic non-road diesel engines are mostly front-mounted. However, thi...

AI Technical Summary

Problems solved by technology

However, this method of arranging the gear train at the front end of the crankshaft has many problems: crankshaft torsional vibration, engine noise, etc. are relatively severe, and the arrangement of the pulley train at the front end of the engine is very limited. The front end of the crankshaft is difficult due to the journal diameter limitation Has a larger power output

In order to ensure reliable fixation, the crankshaft flange is usually installed into the rear end of the crankshaft by hot pressing, but due to the hot pressing method, it is extremely difficult to disassemble and assemble the crankshaft

In actual design, the outer diameter of the flange is often larger than the outer circle of the crankshaft gear, so that the idler gear meshing with the crankshaft gear cannot be installed or removed along the direction of the crankshaft axis, making it impossible to disassemble the engine case gear chamber

Because the crankshaft and the crankshaft flange on it cannot be dismantled when the box-type gear chamber is disassembled, and due to structural constraints (along the movement direction of the gear chamber, the rear end face of the gear chamber will push the idler gear to move along the straight direction of the crankshaft, But the idler gear will be covered by the crankshaft flange, so the gear chamber cannot be removed)

In the same way, this reason also limits the installation of the gear chamber

[0007] Therefore, when designing the traditional rear box-type gear chamber, the crankshaft flange is usually designed to be fixed on the crankshaft by bolts. When disassembling the idler gear, the crankshaft flange can be removed first, but the fixing method of the crankshaft flange is relatively difficult. The hot-pressed crankshaft flange with the same diameter bears a small torque, which limits the maximum power output of the rear-end power output, and has obvious disadvantages.

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