Water-proof rubber sleeve of sparking plug cap

Abstract

Disclosed is a waterproof glue sheath of a spark plug cap, which is provided with a bottom part (1) and an outer collar (2) which is connected with the outer edge of the bottom part (1) into one body, a spark plug mounting hole (3) is arranged on the center of the bottom part (1), an inner collar (4) is stretched out from the spark plug mounting hole end on the inner side face of the bottom part (1) in one piece, an annular groove (5) is formed between the inner collar (4) and the outer collar (2), when in assembling, a spark plug is nested in the inner collar (4), and one end of the spark plug cap is disposed in the annular groove (5). Water will not enter the spark plug easily, the waterproof effect is greatly improved, and the normal running of the spark plug ignition operation can be ensured by adopting the waterproof glue sheath, and the glue sheath has advantages of simple structure and easy assembling.

Description

technical field [0001] The invention relates to an accessory on an engine, especially a waterproof rubber sleeve for a spark plug cap. Background technique [0002] The spark plug is arranged on the cylinder head of the engine, its front end extends to the combustion chamber, and the rear end is generally connected with the high voltage line by the spark plug cap. The spark plug cap is made of metal or rubber. In order to prevent water from entering the spark plug and affecting its normal operation, a waterproof rubber sleeve is usually installed on the spark plug cap. figure 1 It is a schematic diagram of the existing rubber spark plug cap with a waterproof rubber sleeve. It is not difficult to see from the figure that the traditional waterproof rubber sleeve 8 is set between the spark plug cap 7 and the spark plug 6, that is, the waterproof rubber sleeve is partially covered in the axial direction. On the spark plug 6, the remaining part is set on the spark plug cap 7. Th...

AI Technical Summary

Problems solved by technology

figure 1 It is a schematic diagram of the existing rubber spark plug cap with a waterproof rubber sleeve. It is not difficult to see from the figure that the traditional waterproof rubber sleeve 8 is set between the spark plug cap 7 and the spark plug 6, that is, the waterproof rubber sleeve is partially covered in the axial direction. On the spark plug 6, the remaining part is set on the spark plug cap 7. This structure requires high assembly accuracy, and requires a tight fit between the waterproof rubber sleeve, the spark plug cap and the spark plug. However, due to the manufacturing and assembly process The reason, or after using for a long time, there will inevitably be a gap between the waterproof rubber sleeve, the spark plug cap and the spark plug, and water will enter the spark plug along the gap, which will adversely affect the normal ignition of the engine

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