Low-noise crankshaft buffer mechanism and engine

A buffer mechanism and low-noise technology, which is applied in the direction of machines/engines, engine components, mechanical equipment, etc., can solve the problems of increasing production management costs and inability to completely eliminate gaps, achieve low maintenance costs in the later stage, and improve axial movement. , Improve the effect of the axial movement of the crankshaft

Pending Publication Date: 2020-04-03
CHONGQING IONCIN NAVIGATION ENGINE MFG C0 LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method increases more production and management costs, and cannot completely eliminate gaps, and knocking will still occur

Method used

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  • Low-noise crankshaft buffer mechanism and engine
  • Low-noise crankshaft buffer mechanism and engine
  • Low-noise crankshaft buffer mechanism and engine

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] figure 1 A schematic diagram of the engine structure; figure 2 Schematic diagram of the sectional structure of the engine; image 3 for figure 1 Schematic diagram of the enlarged structure at point A;

[0023] This embodiment provides a low-noise crankshaft buffer mechanism. There is a gap 7 in the axial direction between the bearing 2 at at least one end of the crankshaft 1 and the corresponding shoulder, and an elastic member 3 is arranged in the gap. When the crankshaft is normally assembled, both ends of the crankshaft are equipped with bearings, and both ends of the crankshaft are of stepped shaft structure, in which the bearing is sleeved on the small diameter section, and the inner side of the bearing is pressed against the shaft shoulder to form axial positioning, and the bearing passes through the crankshaft The box cover and the corresponding shaft shoulder realize the positioning on both sides of the axial direction, and the inner side of the bearing repr...

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PUM

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Abstract

The invention discloses a low-noise crankshaft buffer mechanism and an engine. A gap is reserved between a bearing at least one end of a crankshaft and a corresponding shaft shoulder in the axial direction, and an elastic piece is arranged in the gap. Due to the reserved gap, normal assembly and operation of the crankshaft and a box body can be ensured, and normal work in the cold machine and heatmachine states can be ensured; the elastic piece provides elastic buffer when the crankshaft axially moves, the axial moving phenomenon of the crankshaft is improved, axial knocking of the bearing and the shaft shoulder is eliminated, and the noise of the whole engine is reduced; the purpose of reducing noise is achieved through small improvement only by additionally arranging the elastic piece,normal assembly and operation of the crankshaft and the crankshaft box body can be ensured under the condition that the machining precision of engine parts is not increased, the production cost and the later maintenance cost are low, the noise reduction effect is remarkable, rigid impact of the bearing and the shaft shoulder is avoided, and the service life of the bearing and the service life of the crankshaft are prolonged.

Description

technical field [0001] The invention belongs to the technical field of engines, and relates to a low-noise crankshaft buffer mechanism and an engine. Background technique [0002] In order to ensure that the engine crankshaft and crankcase are normally assembled within machining tolerances and can work normally in both cold and hot states, existing engines usually leave a gap between the crankshaft shoulder and the crankcase. However, the increase of the gap will increase the amount of axial movement during the crankshaft movement. The shaft shoulder hits the bearing and makes the bearing hit the crankcase. Usually the crankcase body and crankcase cover are assembled with low axial stiffness of the crankshaft. This kind of knock The impact produces new vibration and noise, and may also arouse the natural frequency of the crankcase, resulting in abnormal resonance. Especially when the crankshaft is subjected to alternating forces in the axial direction, for example, when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F7/00
CPCF02F7/006F02F7/008
Inventor 刘志友朱明超廖耕刘进伟鲁卡
Owner CHONGQING IONCIN NAVIGATION ENGINE MFG C0 LTD
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