Hydraulic chain tensioner device

Abstract

The invention discloses a hydraulic chain tensioner device. The structure is as follows: a tensioner fastening seat and a sprocket chamber are fastened and connected through threads, the forefront end of the tensioner fastening seat abuts against a plunger, and the plunger is arranged in a plunger bushing; a check valve and a return spring are sequentially arranged between the plunger and the plunger bushing, and the return spring is arranged in an oil storage chamber of the plunger bushing; a tensioner fastening seat oil chamber is communicated with a plunger oil chamber, and a transverse oil duct and a longitudinal oil duct are arranged in the tensioner fastening seat oil chamber; and a guide plate contacts the outer end of the plunger bushing and is fixed with the sprocket chamber through bolts, and a chain is arranged in a guide plate positioning groove. The device adopts sprocket drive, so the engine has the advantage of simple structure and compact layout. The tensioner can ensure the smooth sprocket drive, and has proper tension for the chain. The hydraulic chain drive can obviously reduce the noise. The invention is especially suitable for overhead camshaft engines, and has high popularization value.

Description

Technical field [0001] The invention belongs to engine parts, and specifically relates to a hydraulic chain tensioning component device. technical background [0002] With the continuous improvement of various aspects of the automobile industry, the power of the engine is also increasing, and the purpose of technical improvements is to improve the transmission performance of the vehicle and simplify the structure. At present, the driving structure of the engine mostly adopts belt transmission and gear transmission. The belt transmission noise is small, but it is easy to cause belt slippage, so that the pulley speed cannot rotate according to the ideal transmission ratio, thereby reducing the transmission efficiency and power of the engine. The gears used in gear transmission are mostly helical gears, which have high processing accuracy. In addition to increasing costs, the heavy gears increase the weight of the engine, and at the same time, the transmission noise is also relative...

AI Technical Summary

Problems solved by technology

At present, the driving structure of the engine mostly adopts belt transmission and gear transmission. The noise of the belt transmission is small, but it is easy to cause the belt to slip, so that the speed of the pulley cannot rotate according to the ideal transmission ratio, thereby reducing the transmission efficiency and power of the engine.

The gears used in gear transmission are mostly helical gears, which have high machining accuracy. In addition to increasing the cost, the weight of the engine is increased due to the thicker gears, and the transmission noise is also relatively large.

In addition, at present, a certain amount of clearance must be reserved between the tensioning device of the mechanical rigid structure and the chain, and the chain will also generate relatively large noise when it is working.

Images