Dynamic balance inspection of assembled crank link mechanism of single-cylinder engine

A crank linkage mechanism and detection method technology, applied in the static/dynamic balance test, machine/structural component test, measuring device, etc., can solve the problems that cannot be used in mass production, time-consuming and labor-intensive, etc., to achieve convenient inspection, The operation saves time and effort, and the effect of good performance consistency

Inactive Publication Date: 2006-08-16
力帆科技(集团)股份有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a single-cylinder motorcycle engine combined crank-link mechanism dynamic balance detection method to solve the problem that the exis

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  • Dynamic balance inspection of assembled crank link mechanism of single-cylinder engine
  • Dynamic balance inspection of assembled crank link mechanism of single-cylinder engine
  • Dynamic balance inspection of assembled crank link mechanism of single-cylinder engine

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] Taking LF163FML-2 single-cylinder motorcycle engine as an example, according to a large number of experiments, it is shown that the vibration effect of the whole vehicle is the best when the crankshaft main inclination angle θ=80° and unbalance ratio γ=21%. The engine crank radius r=31.1mm; the total mass of piston, piston ring, piston pin and piston pin collar Mp=195g; the mass of connecting rod M L =200g, distance L from the center of mass of the connecting rod to the center of the small end of the connecting rod A =72.75mm; the distance L from the center of mass of the connecting rod to the center of the big end of the connecting rod B =32.75mm; the center distance of connecting rod size head hole L=L A +L B =105.5mm; crank pin mass M Q =265g; Connecting rod big head needle roller bearing M Z = 35g. Such as figure 1 As shown,...

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Abstract

A method for detecting dynamic balance of integrated crank link mechanism of single cylinder motorcycle includes calculating out vector corresponding main dip angle and unbalance rate of crankshaft then obtaining moment of inertia on crank itself, obtaining rotary moment of inertia for balance weight plate to be set on crank, designing size and erecting position as well as number of said plate, setting crank with designed balance weight plate on vertical balancing machine for being detected, marking unbalanced position and unbalanced amount out then drilling holes on crank according to marks.

Description

technical field [0001] The invention belongs to the technical field of engine manufacturing, and in particular relates to a method for detecting dynamic balance of a combined crank-link mechanism of a motorcycle engine. Background technique [0002] At present, the crank-connecting rod combination of a single-cylinder motorcycle engine generally adopts the excess balance method. Its essence is to take the mass Mω of the balance weight so that the centrifugal inertia force exceeds the rotating mass M at the crank pin. rot The resulting centrifugal force. That is, Mω×Rω>M rot ×r (see figure 2 ), so that part of the reciprocating inertia force is transferred to the direction perpendicular to the cylinder or other directions. This method has low cost and is suitable for single-cylinder engines with small displacement. Unreasonable mass distribution of the balance weight of the crankshaft will cause greater vibration of the engine. When the crankshaft main inclination angl...

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Application Information

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IPC IPC(8): G01M1/16
Inventor 尹明善程志明田亚平陈建
Owner 力帆科技(集团)股份有限公司
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