Underslung single camshaft engine decompression mechanism of motorcycle

A decompression mechanism, camshaft technology, applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of large starting resistance, noise, short service life of the engine, etc., to achieve decompression function, simple structure, work reliably

Active Publication Date: 2011-02-16
CHONGQING LONCIN MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The decompression mechanism of the existing lower camshaft engine is arranged as a flying block tension spring and an eccentric cam. The structure is relatively complicated, and it is prone to failure and noise. The starting resistance is too large, resulting in a short service life of the engine. The problem of kickback

Method used

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  • Underslung single camshaft engine decompression mechanism of motorcycle
  • Underslung single camshaft engine decompression mechanism of motorcycle
  • Underslung single camshaft engine decompression mechanism of motorcycle

Examples

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0020] see Figure 1 to Figure 7 , a single camshaft type engine decompression mechanism under the motorcycle, including a camshaft, the camshaft includes a cam 2 and a journal 1 extending axially along one side of the cam, the journal 1 and the cam 2 are integrally formed, and the camshaft An eccentric slider 3 is movably sleeved on the neck 1. The shaft hole diameter of the eccentric slider 3 is larger than the outer diameter of the journal 1. The outer contour shape of the eccentric slider 3 is similar to that of the cam 2, and the eccentric slider The perimeter of the outer edge of the block 3 is smaller than the perimeter of the outer edge of the cam 2 . The outer edge surface of the eccentric slider 3 is provided with a flange 3a, the flange 3a of the eccentric slider is adjacent to the near-stop end of the cam 2, and the center of gravity of the eccen...

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Abstract

The invention relates to an underslung single camshaft engine decompression mechanism of the motorcycle. The decompression mechanism comprises a camshaft, wherein the camshaft contains a cam and a shaft journal extending axially on one side of the cam; an eccentric slide block is movably sleeved on the shaft journal, the diameter of the shaft hole of the eccentric slide block is more than the outside diameter of the shaft journal; a flange is arranged on the outer edge of the eccentric slide block; the flange is near the near stop-stroke end of the cam, the centre of gravity of the eccentric slide block is near the far stop-stroke end of the cam; the side of the cam is provided with a guide pin, the guide pin is near the far stop-stroke end of the cam, the inner edge of the eccentric slide block is provided with a radial guide slot, the guide slot is matched with the guide pin on the side of the cam; and the shaft journal is provided with a spring which is used to push the eccentric slide block radially and ensure that the flange of the eccentric slide block extrudes on the near stop-stroke end of the cam. The decompression mechanism has simple structure and reliable operation and can automatically realize the decompression function in the start-up phase of the engine.

Description

technical field [0001] The invention relates to a motorcycle engine, in particular to a lower-mounted single camshaft engine decompression mechanism for a motorcycle. Background technique [0002] When the motorcycle engine is started, it needs to inhale new gas for compression. Near the end of the compression, there will be a large compression resistance. The decompression mechanism decompresses to ensure the smooth start of the engine. After the engine is started, the decompression mechanism is required to automatically unload the decompression function so that the engine can work normally. The decompression mechanism of the existing lower camshaft engine is arranged as a flying block tension spring and an eccentric cam. The structure is relatively complicated, and it is prone to failure and noise. The starting resistance is too large, resulting in a short service life of the engine. The problem of rebounding teeth. Contents of the invention [0003] The technical prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/08
Inventor 李世瑛
Owner CHONGQING LONCIN MOTOR
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