CN2693957Y

CN2693957Y - Valve clearance self-regulating gas distribution mechanism for motorcycle engine

Info

Publication number: CN2693957Y
Application number: CN 200320124136
Authority: CN
Inventors: 唐大学; 海争平; 谢金峰; 阳小良; 凌丽琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-30
Filing date: 2003-12-30
Publication date: 2005-04-20
Anticipated expiration: 2013-12-30

Abstract

The utility model relates to a valve clearance self-regulating gas distribution mechanism for motorcycle engine, comprising a cam wheel or a rockerarm, a tappet, a spring base, a valve spring, a valve guide and a valve seat. The utility model is characterized in that the tappet is a hydraulic pressure tappet; a hydraulic oil cylinder is sheathed in the tappet body. The utility model has the advantages of that the valve clearance of the self-regulating gas distribution mechanism is zero. The valve clearance self-regulating gas distribution mechanism for motorcycle engine has no need of manual adjustment for customers to use conveniently. The motorcycle engine grade is improved. The engine cylinder head noise is effectively eliminated or decreased. The utility model can be matched with the present engine and is all-purpose.

Description

The valve clearance self-regualting type distribution device of motorcycle engine

Technical field: the utility model relates to a kind of valve clearance self-regualting type distribution device of motorcycle engine distribution device, particularly motorcycle engine.

Background technique: along with pursuit and requirement on environmental protection to Economy, travelling comfort, modern motor vehicular engine more and more to speed up and to automatic controlling party to development, speed up then requires motor whole machine balancing, component miniaturization, light weight; For automatic control aspect, then adopt sensor and electronic technology in a large number, making needs the artificial project of adjusting few more good more.The valve clearance of the four stroke engine that motorcycle extensively adopts is the artificial projects of adjusting of traditional needs, therefore people are pursuing always and are exploring the mechanism that a kind of valve clearance need not manually be adjusted, making the valve clearance is zero and adjustment maintenance automatically, and eliminates or attenuating cylinder head noise.

Summary of the invention: the purpose of this utility model is to design a kind of motorcycle engine valve clearance and adjusts distribution device automatically, and it can adjust the valve clearance automatically is null value, and keeps null value, realizes that the motorcycle valve clearance no longer needs artificial the adjustment.

Technical solution of the present utility model is a kind of valve clearance self-regualting type distribution device of motorcycle engine, form by cam or rocking arm, tappet, spring seat, valve spring, valve guide bushing, valve seat, it is characterized in that its tappet is a hydraulic tappet, it is made of suit hydraulic jack in the tappet body.

Description of drawings:

Fig. 1 the utility model overhead-cam air distribution structure schematic representation;

Fig. 2 the utility model Overhead valve formula air distribution structure schematic representation;

Fig. 3 hydraulic tappet structural representation;

Fig. 4 prior art overhead-cam air distribution structure schematic representation;

Fig. 5 prior art Overhead valve formula air distribution structure schematic representation;

Embodiment:

The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:

A kind of valve clearance self-regualting type distribution device of motorcycle engine, it by cam [1] or rocking arm [24] be pressed on the hydraulic tappet [2], hydraulic tappet [2] is in spring seat [3] and spring [4] are installed on hydraulic tappet cover on the engine cylinder cover [5], and the oil cylinder bottom of hydraulic tappet [2] contacts with valve [6] top.Referring to accompanying drawing 1,2.Fig. 1 is the overhead-cam distribution device, and Fig. 2 is an Overhead valve formula distribution device.

The tappet of using on hydraulic tappet [2] structure and the existing motor car engine is basic identical, referring to accompanying drawing 3.Tappet body [19] internal upper part has oil storage chamber A[15], oil storage chamber A[15] there are sealing cover [11], an oil storage chamber A[15 in the upper end] end one side has oil inlet hole [20] and tappet body [19] outside; Oil cylinder [18] is housed in the tappet body [19], outer wall of cylinder block and oil storage chamber A[15] end center mounting hole wall [17] slipper seal is connected, oil storage chamber B[13 is arranged at plunger [14] top of oil cylinder [18]], sealing cover [11] bottom surface had oil groove [12] to be communicated with oil storage chamber A[15] and B[13]; The one-way valve [16] by carriage [23] supporting is equipped with in plunger [14] bottom, and plunger [14] and carriage [23] are supported by spring [22], at oil cylinder [18], oil storage chamber B[13 at the end] high-voltage oil cavity C[21 below one-way valve [16] and oil cylinder [18] inner plunger [14]] be communicated with.

The utility model valve clearance self-regualting type distribution device working principle is as follows:

When cam [1] downwards during roof pressure hydraulic tappet [2], the machine oil in the high-voltage oil cavity C between plunger and the oil cylinder is compressed, and pressure raises, closed check valve, because the incompressibility of liquid has guaranteed the regular movement of valve according to cam.

When cam [1] moves upward, when leaving hydraulic tappet [2], machine oil volume in the high-voltage oil cavity C between plunger and the oil cylinder increases, pressure reduces, one-way valve opens enters in the oil storage chamber A from the oil inlet hole [20] of machine oil on hydraulic tappet of oil inlet hole on the cylinder head [25], enters oil storage chamber B through oil groove [12], enter the high-voltage oil cavity C between plunger and the oil cylinder again, having guaranteed does not have the gap between valve and the cam.And no matter how the distribution device operating temperature changes, and guarantees that too the valve clearance is zero.

When the distribution device operating temperature reduces, cause the valve clearance non-vanishing, at this moment, return spring [22] promotes oil cylinder downwards, the volume between plunger and the oil cylinder is increased, thereby oil is entered in the high-voltage oil cavity C from oil storage chamber A, has eliminated the valve clearance.

When the distribution device temperature raises, cause valve-closing not tight, at this moment, return spring [22] makes closed check valve, and the high-voltage oil cavity volume between plunger and the oil cylinder diminishes, and oil pressure raises, partly oil leaks from the matching gap between column piston and the oil cylinder, thereby makes valve-closing tight.

The utility model advantage is that the valve clearance of automatically adjusting valve actuating mechanism is null value, need not manual adjustment, and the side Just the user uses; Improve the motorcycle engine class, effectively eliminated or reduced the cylinder head noise of engine. Highly versatile, can with the supporting combination of available engine.

Claims

1, a kind of valve clearance self-regualting type distribution device of motorcycle engine, form by cam or rocking arm, tappet, spring seat, valve spring, valve guide bushing, valve seat, it is characterized in that its tappet is a hydraulic tappet, it is made of suit hydraulic jack in the tappet body.