A plug mechanism for air tightness detection of cylinder
A technology of air tightness detection and plugging, which is applied in the direction of detecting the appearance of fluid at the leakage point, using liquid/vacuum degree for liquid tightness measurement, etc., which can solve the problem that the plugging head cannot completely seal the hole or channel, and the detection result is very poor. Difficult to achieve accuracy and reliability, affecting the accuracy of cylinder air tightness inspection results and other issues, to achieve the effect of ensuring accuracy
Inactive Publication Date: 2016-11-30
南通也成精密部件有限公司
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[0004] However, although this type of detection realizes the detection of the airtightness of the cylinder head assembly, and the detection is comprehensive and efficient, the detection results are difficult to achieve an accurate and reliable level. The reason is that: due to the clamping error of the fixture or the cylinder itself Processing errors may cause various plugs to not completely seal various holes or passages, thereby affecting the accuracy of cylinder air tightness inspection results
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[0025] Such as Figure 1 to Figure 4 As shown, a plugging mechanism for cylinder air tightness testing includes a sealing head 10, a telescoping device 20 for the sealing head 10 to expand and contract, a positioning device 30 for axially positioning the sealing head 10, and the plugging mechanism is installed on the The bearing device on the main body of the air tightness detection device. It also includes a universal rotating device connected to the telescopic device 20, the universal rotating device includes a bracket 51, a ball 52, a shaft 53, and a guide device 54, and the bracket 51 is provided with a blind hole with a tapered bottom in the axial direction. One end of the shaft 53 is provided with a tapered blind hole, the shaft 53 is inserted into the blind hole of the bracket 51, the ball 52 is placed between the blind hole of the bracket 51 and the blind hole of the shaft 53, and between the shaft 53 and the blind hole of the bracket 51 The fit between them is cleara...
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The invention discloses a plugging mechanism for cylinder air tightness detection, which comprises a sealing head (10), a stretching device (20) for the sealing head (10) to expand and contract, and a positioning device for axially positioning the sealing head (10). Device (30), also comprises universal rotation device, and universal rotation device comprises support (51), ball (52), axle (53), guide device (54), and support (51) is provided with the bottom in axial direction and is cone Shaped blind hole, shaft (53) one end is provided with tapered blind hole, ball (52) is placed between bracket (51) blind hole and shaft (53) blind hole, shaft (53) and bracket (51) blind hole The fit between them is a clearance fit, and the guide (54) can make the shaft (53) do axial movement of a certain amount of displacement. The sealing head capable of a certain amount of universal movement can compensate the error of clamping the cylinder and the processing error of the cylinder itself, so that the sealing head can accurately seal the hole or channel of the cylinder, thereby ensuring the accuracy of the air tightness inspection result of the cylinder.
Description
technical field [0001] The invention relates to the field of airtightness testing equipment for parts, in particular to a plugging mechanism for cylinder airtightness testing. Background technique [0002] The cylinder of an automobile engine is a key component of the engine, and the airtightness of each channel directly affects the overall quality of the engine. The concave portion of the bottom surface of the cylinder together with the piston top and the inner wall of the cylinder constitutes the combustion chamber. For the cylinder of the overhead valve four-stroke engine, not only the spark plug but also the valve, valve seat, valve guide, camshaft and other parts must be installed, so the cylinder is provided with a spark plug installation hole, a camshaft hole, and an oil passage. Holes, intakes, exhausts, etc. If the cylinder seal is not good, it will seriously affect the working performance and efficiency of the engine. To ensure the air tightness of the cylinder a...
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IPC IPC(8): G01M3/10
Inventor 张容
Owner 南通也成精密部件有限公司