Bulldozer

Abstract

The invention discloses a bulldozer which comprises a main machine frame. An engine, a machine cover and an exhaust gas post-processing device are arranged on the main machine frame. A gas inlet of the exhaust gas post-processing device is communicated with a worm wheel gas outlet of the engine through a pipeline. The exhaust gas post-processing device is fixed to the machine cover. Vibration generated by the engine in the bulldozer needs to be transmitted to the main machine frame through an engine supporting frame or a shock absorption device and then transmitted to the machine cover through the main machine frame, so that the vibration transmission path is long, vibration damping becomes complex, the damping value is high, and vibration transmitted to an air filter is quite small; vibration caused by working of a scraper knife working device to the main machine frame is transmitted to the exhaust gas post-processing device through the main machine frame, the machine cover, the shock absorption device and the like, so that the vibration transmission path is long, and the exhaust gas post-processing device is accordingly less influenced by vibration caused by working of the scraper knife working device; the exhaust gas post-processing device is arranged on the machine cover, and therefore the length of an exhaust pipeline can be shortened, pipeline layout can be optimized, and system working reliability can be improved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a bulldozer. Background technique [0002] Due to the limitation of working conditions, the vibration and noise of construction machinery are basically difficult to eliminate. In the prior art, vibration reduction is generally achieved by setting a vibration reduction mechanism and optimizing the structure of the vibration reduction mechanism. Key issues in structural design. [0003] The vibration of the bulldozer mainly comes from five aspects: power system, walking system (road conditions), body structure, hydraulic system and cooling fan system. Among the above five aspects, the vibration of the engine in the power system is the main vibration source of the bulldozer. Among them, the power system Bulldozers with diesel engines have more serious vibrations than those with gasoline engines. Therefore, the vibration reduction measures of the components directly c...

AI Technical Summary

Problems solved by technology

[0006] In addition, the body structure is welded by a large number of thin plate parts. This structure is easy to form a new vibration source driven by the power system and the walking system. The above engine and hydraulic pump are independently damped, and the vibration of the engine and hydraulic pump is not Synchronization, especially when its natural frequency is consistent with the vibration frequency, there will be resonance phenomenon, which is not only not conducive to the driving of the bulldozer, but also will greatly shorten the service life of the bulldozer

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