Checking fixture for measuring depth of bottom hole of valve retainer of engine cylinder cover

Abstract

The invention provides a checking fixture for measuring the depth of a bottom hole of a valve retainer of an engine cylinder cover, and the checking fixture is used for completing detection of the depth size of the bottom hole of the valve retainer of the engine cylinder cover. The checking fixture comprises a measurement execution mechanism, a displacement transmission mechanism, a support and control mechanism and a measurement data display mechanism, wherein the measurement execution mechanism comprises a guide measuring rod, a flange base and a flange cover; the guide measuring rod is located at the lower end of the checking fixture and consists of a measuring head and a connection base; the bottom face of the connection base is a test reference surface; the top end of the connection base is fixedly connected with the corresponding element of the support and control mechanism; the flange base is in an inverted disk structure; a large round hole is arranged on the top face of the flange base, and the bottom face of the flange base is provided with a measuring face; the flange cover is fixedly mounted on the top face of the flange base; and a disk-shaped groove is arranged at the center of the flange cover; and the disk-shaped groove is connected with a peripheral framework through three ribs. The checking fixture disclosed by the invention has the advantages of compact structure and simplicity in operation. The detection precision of a working piece to be measured can be ensured, and the service life of the checking fixture is prolonged.

Description

technical field [0001] The invention relates to a measuring and checking tool, which is especially suitable for detecting the depth of the bottom hole of the valve seat circle of the engine cylinder head, and belongs to the technical field of testing. Background technique [0002] The engine cylinder head is an important part of the engine body. Its main function is to close the upper part of the cylinder and form a combustion chamber together with the top of the piston and the cylinder wall. It also carries some parts of the valve train and cooling system. Therefore, the engine cylinder The cover structure directly affects the power and economic performance of the engine. As one of the important dimensions of the cylinder head structure design, the depth of the bottom hole of the valve seat ring of the engine cylinder head needs to be strictly controlled in the process of cylinder head processing. At present, the detection of the depth of the bottom hole of the engine cyli...

AI Technical Summary

Problems solved by technology

The disadvantages of this measurement method are manifested in two aspects. One is that the split-type measuring fixture is inconvenient to use and the measurement error is larger; the other is that the measuring rod needs to be directly taken by hand during measurement, which will cause sweat and dirt to corrode the measuring rod. , not only is it difficult to ensure the accuracy of measurement, but also the inspection tool is easily damaged and has a short service life

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