Engine

An engine and driven shaft technology, applied in engine components, machines/engines, motor vehicles, etc., can solve the problems of difficult maintenance of driving gears and longer crankshaft lengths, etc.

Inactive Publication Date: 2007-06-06
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the above-mentioned plurality of driving gears are only arranged in parallel on the crankshaft, in order to securely attach the driving gears to the crankshaft, it is necessary to increase the thickness of each driving gear in the axial direction. long length problem
In addition, when the above-mentioned drive gears are mounted by press-fitting, there is also a concern that maintenance such as replacement of these drive gears becomes difficult.

Method used

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Embodiment Construction

[0031] Embodiments of the present invention will be described below based on the drawings.

[0032] 1 to 15 are diagrams for explaining a motorcycle engine according to an embodiment of the present invention, FIG. 1 is a left side view of a motorcycle equipped with an engine according to this embodiment, and FIG. 2 shows the engine in an unfolded state. The sectional top view (II-II line sectional view of Fig. 6), Fig. 3 is the sectional top view of the continuously variable transmission mechanism and the centrifugal clutch mechanism part of the engine, and Fig. 4 and Fig. 5 are the right side view and the left side view of the engine, Fig. 6 is a right side view of the state where the continuously variable transmission mechanism and the centrifugal clutch mechanism of the engine are removed, Fig. 7 is a right side view of the crankcase, and Fig. 8 is a sectional top view of the crankcase (section along line VIII-VIII of Fig. 5 ), Fig. 9 is a cross-sectional top view of the ki...

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Abstract

An engine capable of transmitting a rotational force between a crankshaft and first and second driven shafts through first and second drive gears on the crankshaft side and first and second driven gears on the first and second driven shaft sides, wherein the first drive gear is fixedly installed on the crankshaft, the second drive gear is detachably engaged with the first drive gear so as to be overlapped with the engaged part of the first drive gear, the transmission of the rotational force between the crankshaft and the first driven shaft is performed directly between the first drive gear and the first driven gear, and the transmission of the rotational force between the crankshaft and the second driven shaft is performed through the second drive gear between the first drive gear and the second driven gear.

Description

technical field [0001] The present invention relates to an engine, which utilizes a first drive gear and a second drive gear installed on a crankshaft to respectively drive a first driven shaft and a second driven shaft, such as a lubricating oil pump shaft, a balancer shaft, or , for example, the crankshaft is rotationally driven by the kicker shaft via the above-mentioned first drive gear. Background technique [0002] For example, in a motorcycle engine, generally, a plurality of drive gears mounted on a crankshaft, for example, rotate and drive a lubricating oil pump and a balancer shaft (for example, refer to Japanese Patent Application Laid-Open No. 8-189323). In this case, each of the above-mentioned driving gears is set to have an outer diameter corresponding to the purpose of the driven member. For example, since the lubricating oil pump is driven at a speed that decelerates the rotation of the engine, and the balancer shaft is driven at the same rotational speed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B67/04F02B61/02B62M7/02F02B75/02F02B75/16F02F7/00F16H1/06
CPCF02B75/16F02B2275/20F02B61/02F02B2075/027
Inventor 大石明文石田洋介
Owner YAMAHA MOTOR CO LTD
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