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Crankcase of opposited engine with double cylinders

A technology of engine and crankcase, which is applied in the field of crankcase, can solve the problems of high production cost, inconvenient maintenance, high scrap rate, etc., and achieve the effects of reducing production cost, facilitating maintenance and saving materials

Inactive Publication Date: 2009-03-18
CHONGQING ZONGSHEN INNOVATION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Integral crankcase is not only bulky, expensive material, loose structure, but also difficult to use pipelines for oil passages, and the scrap rate is high
However, the foreign BMW opposed twin-cylinder engine adopts a longitudinally split crankcase along the direction of the crankshaft axis, and the crankshaft support bearing hole is composed of two halves. Die-casting will reduce the strength of the engine crankcase.
[0003] The disadvantage of the above technical solution is that the casting, processing and assembly of the crankcase of the opposed twin-cylinder engine using these two structural forms are not ideal, the maintenance is inconvenient, and the production cost is relatively high.
This shows that there are still many defects in the above-mentioned existing opposed twin-cylinder engine crankcase structure, and it needs to be further improved.

Method used

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  • Crankcase of opposited engine with double cylinders
  • Crankcase of opposited engine with double cylinders

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Embodiment Construction

[0018] Below in conjunction with the accompanying drawings and preferred embodiments, the structure, features and effects of the crankcase of the opposed twin-cylinder engine proposed according to the present invention are described as follows.

[0019] Fig. 1 shows an embodiment of the lateral split structure of the opposed twin-cylinder engine crankcase of the present invention, wherein, the engine crankcase body is divided into front casing 1 and rear casing according to the transverse direction perpendicular to the axis of the crankshaft 6. The front box body 1 and the rear box body 6 are combined and connected by using two positioning pins 5 and several bolts 2 to form a complete box body. The crank bearing hole 7 of the front casing 1 and the crank bearing hole 4 of the rear casing 6 are integral structures, and in order to further improve the strength of the crankcase, an inlay 3 is added to the crank bearing hole, and the inlay 3 adopts such as Made of metal material. ...

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Abstract

A cross located double cylinder crankcase comprises a main case body and crankshaft pole. The main case body is divided into two parts vertical to the axle of the crank shaft: front part and back part. The front part is linked to the back part via dowel pins and bolts. Whereon the integrated crankshaft pole on the front part and back part of the crankcase inlayed metal liner to enhance the strength.

Description

technical field [0001] The invention relates to a crankcase device of an engine, in particular to a crankcase used for an opposed twin-cylinder engine of a motorcycle. Background technique [0002] At present, domestic crankcases used on opposed twin-cylinder water-cooled engines or opposed twin-cylinder engine casings are integral (such as the Yangtze River 750 engine) and sand-cast. Integral crankcases are not only bulky, expensive, and loose in structure, but also difficult to use for oil passages, and have a high scrap rate. However, foreign BMW opposed twin-cylinder engines adopt a longitudinally split crankcase along the crankshaft axis, and the crankshaft bearing hole is composed of two halves. Die-casting is used, but the strength of the engine crankcase is reduced. [0003] The disadvantages of the above-mentioned technical solutions are that the crankcases of the opposed twin-cylinder engine adopting these two structural forms have unsatisfactory manufacturability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F7/00
Inventor 胡安德莫启雄刘海
Owner CHONGQING ZONGSHEN INNOVATION TECH RES INST CO LTD
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