Engine cylinder upper stop point positioning device and positioning method

Abstract

The invention relates to the field of manufacturing of vehicle engine cylinders, and aims to provide an engine cylinder upper stop point positioning device and a positioning method. The engine cylinder upper stop point positioning device comprises a cylinder body of an engine provided with a first positioning hole and a second positioning hole, a crankshaft provided with a connecting key, a positioning rod provided with a first positioning shaft and a second positioning shaft, a one-way thrust rod provided with a hinge shaft hinged to the positioning rod, an indexing plate provided with an inner hole and a key slot, a rocking handle connecting pipe connected with the indexing plate, multiple indexing teeth uniformly arranged at the outer side periphery of the indexing plate, an initial positioning recess provided with an initial positioning surface at the lower end of the positioning rod, and a back positioning recess provided with a back positioning surface and a guide inclined surface at the lower end of the one-way thrust rod. The engine cylinder upper stop point positioning device is convenient to measure a multi-cylinder engine, and is simple in structure, low in cost and higher in positioning efficiency. The positioning method of the engine cylinder upper stop point positioning device can satisfy sequential determination of upper stop points of all cylinders of the engine, and is higher in positioning efficiency.

Description

technical field [0001] The invention relates to the field of automobile engine cylinder manufacturing, in particular to a top dead center positioning device and a positioning method for an engine cylinder. Background technique [0002] Assembling the automobile engine, adjusting the valve clearance and adjusting the timing all need to locate the top dead center of each cylinder; the utility model of Chinese patent application number: 201220501420.4 discloses a measuring device for the top dead center of the engine cylinder, which includes a fixed seat, a scale And the ejector rod, the fixed seat is used to fix the measuring device to the cylinder head, the scale has a scale, the ejector rod is horizontally fixed on the top of the scale, and the ejector rod can be fixed on the top of the valve stem to follow the valve up and down sports. The engine cylinder top dead center measurement device has the disadvantage of measuring multi-cylinder engines; the invention of Chinese p...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of the current top dead center measurement device for engine cylinders, such as difficulty in measuring multi-cylinder engines, complex structure, high cost, and low positioning efficiency, and to provide a method for measuring multi-cylinder engines that is convenient, simple in structure, low in cost, and capable of positioning Higher efficiency engine cylinder top dead center positioning device and positioning method

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