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Crankshaft support for engine

An engine and crankshaft technology, applied in the direction of rotating motion bearings, crankshaft bearings, engine components, etc., can solve problems such as the size limit of the main bearing 2

Inactive Publication Date: 2002-12-11
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the case of the above-mentioned existing structure, when assembling, since the crankshaft 1 integrated with the timing sprocket 7 must pass through the main bearing 2, the inner diameter R2 of the inner ring 3 of the main bearing 2 must be larger than that of the timing chain. The outer diameter R1 of the wheel 7 is large, as a result, the size of the main bearing 2 is limited by the timing sprocket 7

Method used

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  • Crankshaft support for engine
  • Crankshaft support for engine
  • Crankshaft support for engine

Examples

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Embodiment Construction

[0011] Hereinafter, an embodiment will be described with reference to the drawings. figure 1 is the same as image 3 A diagram of the crankshaft support structure in the same motorcycle engine. figure 2 is a diagram showing its assembly method. for with image 3 Common parts use common symbols. In addition, in the following description, left and right are represented by figure 1 The state shown in the middle orientation is the reference.

[0012] The crankshaft 10 is divided into left and right parts. The left side has a vertical wall 11, a shaft portion 12 extending integrally from its center, and a bearing housing 13 disposed near the vertical wall 11 on the outer periphery of the shaft portion 12. Similarly, the right side has a vertical wall 14 , a shaft portion 15 extending integrally from the central portion, and a bearing housing 16 provided near the vertical wall 11 on the outer periphery of the shaft portion 15 . The left and right vertical walls 11 and 14 are ...

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PUM

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Abstract

The invention discloses a crankshaft supporting structure of an engine, which can make the main bearing supporting the crankshaft smaller and lighter. The inner ring 28 constituting the main bearing 22 is loosely fitted on the bearing seat portion 13 of the shaft portion 12, and the axial direction is fixed by the flange portion 31 of the timing sprocket 30 press-fitted into the shaft portion. The outer diameters R1 and R3 of the timing sprocket 30 and the flange portion 31 are smaller than the outer diameter R4 of the inner ring 28 , respectively. The outer ring 26 of the main bearing 22 is press-fitted and fixed on the crankshaft left case 20 side, so that the roller 27 is integrated. When the shaft part 12 is pressed into the inner side of the roller 27, the timing sprocket 30 and the flange part 31 pass through the inner side of the roller 27, and the inner ring 28 is fitted on the roller 27. Thus, the inner diameter R2 of the inner ring 28 can be made smaller than the outer diameter R1 of the timing sprocket 30 .

Description

technical field [0001] The invention relates to a crankshaft support device of an engine. Background technique [0002] Conventionally, there is a crankshaft support structure of an engine in which a main bearing supports a crankshaft and a sprocket is fitted to the crankshaft (as an example, refer to Patent No. 2813011). image 3 This is an example of the supporting structure of such a crankshaft. Symbol 1 is the crankshaft, 2 is the main bearing, 3 is the inner ring, 4 is the ball, 5 is the outer ring, 6 is the crankcase, and 7 is the part fitted to the crankshaft 1. Around the timing sprocket, 8 is the timing chain. The outer diameter R1 of the timing sprocket 7 is smaller than the inner diameter R2 of the inner ring 3, and the crankshaft 1 fitted with the timing sprocket 7 can pass through the inner peripheral side of the main bearing 2 fixed in advance on the crankcase 6 side. to assemble. [0003] However, in the case of the above-mentioned existing structure, when a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/06F02F7/00F16C3/10F16C9/02F16C33/08F16C35/06
CPCF02F7/0053F16C3/10F16C9/02F16C35/06F16C19/26F16C19/06F16C19/54F16C3/06F16C33/08
Inventor 野村明史志村康雄
Owner HONDA MOTOR CO LTD