CN2352677Y

CN2352677Y - Abrasion-free type rocker arm and shaft of motor cycle

Info

Publication number: CN2352677Y
Application number: CN 98240787
Authority: CN
Inventors: 贺军波
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-12
Filing date: 1998-09-12
Publication date: 1999-12-08
Anticipated expiration: 2008-09-12

Abstract

The utility model provides an abrasion-free type rocker arm and an abrasion-free type shaft of a motor cycle. One section of the rocker arm matching with the work of a cam is divided into an upper small arm and a lower small arm. A short shaft which is sheathed with a shaft sleeve is fixed between the outer ends of the upper small arm and the lower small arm. Three oil holes are arranged on the shaft in an oblique line, and both sides of the rocker arm winding the upper part and the lower part of the shaft are respectively provided with three oil holes which are arranged in a triangle. The middle part of the rocker arm shaft is provided with two O-shaped oil slots. The utility model greatly raises the bending resistant capability of the rocker arm. The friction coefficient between the rocker arm and the cam is reduced through the lubricating design of increasing the oil holes and the oil slots, and the utility model always keeps an optimal lubricating and cooling condition. Consequently, the abrasion and the scratch are avoided, the noise is reduced, and the service lives of the rocker arm and a cam shaft are effectively raised.

Description

Motorcycle " zero " wearing and tearing rocking arm and axle

The utility model relates to the parts on a kind of motorcycle engine, " zero " wearing and tearing rocking arm and axle in especially a kind of engine valve actuating mechanism.

The motor overwhelming majority who is applied at present on the motorcycle is a four stroke engine, distribution device is the exclusive structure of four stroke engine, press the position that valve is arranged, can be divided into Overhead valve and side-located gas-gate two big classes, overhead valvetrain assembly is divided into two kinds of overhead camshaft type and lower arranging cam axle types again by the residing position of distribution cam axle.The effect of rocking arm is to give valve the transmission of movement of camshaft, and two arms all bear bigger flexural stress during work, and it is a double-arm lever, and its back does not have strengthening rib, makes the section of two arms be T-shaped, to increase bending resistance.Though rocking arm and axle construction are simple, cost is low and prolong usefulness for many years, but along with motorcycle engine constantly develops to the high-performance direction, their deficiency is obviously showed: 1. working life is low, travelling several thousand kilometers will occur wearing and tearing in various degree and abrading, and replacing needs repairing.2. rocking arm is easy to generate distortion under high engine speeds running work for a long time.3. lubricated, cool condition is poor; easy to wear between rocking arm and cam work junction plane, rocker shaft hole and the axle, scratch; influence the work quality of fit; generation noise; when the engine oil deficiency, when oil pressure is not enough, also can produce dry grinding, operating temperature is sharply risen; the equipment sintering phenomenon occur, finally cause motor not work.

The purpose of this utility model provides a kind of structure and lubrication system to rocking arm and improves, and improves its bending resistance and reduces friction ractor, can reduce noise, the motorcycle that increases the service life " zero " wearing and tearing rocking arm and axle.

This section arm that the utility model is taked rocking arm is cooperated with cam work is divided into upper and lower two forearm A, B, fix the minor axis one parallel, that overcoat has hollow cartridge sleeve between A, the B outer end, on axle sleeve, be oblique line and arrange and have 3 oilholes by 120 ° of divisions of circle with pitman arm shaft; Respectively have 3 around the both sides of axle top and the bottom at rocking arm and be the oilhole that " product " font is arranged, drive twice " 0 " shape oil groove at the pitman arm shaft middle part around axle, oil groove top also has the structure of two parallel little oilholes.

The utility model is by the improvement to rocking arm, its bending resistance has been improved a lot, increase oilhole, oil groove Lubrication Design the friction campaign of rocking arm and cam is changed into gliding motility, friction ractor between rocking arm and the cam is reduced greatly, basic realize " zero " weares and teares, make their lubricated and cooling all keep the optimum state when, thereby avoided the wearing and tearing and the scratch that cause because of insufficient lubrication, noise and pollution have been reduced, improve parts functional reliability, validity and stability, and can effectively improve the life-span of rocking arm and camshaft.

Elaborate below in conjunction with accompanying drawing.

Fig. 1 is existing rocker structure schematic representation.

Fig. 2 is the utility model structural representation.

Fig. 3 is minor axis and the axle sleeve schematic representation on the utility model rocking arm.

Fig. 4 is the structural representation of the utility model pitman arm shaft.

The utility model is made up of rocking arm (2) and central shaft (1) thereof; this section arm that rocking arm (2) cooperates with cam work is divided into upper and lower two forearm A, B; fix the minor axis (5) parallel with pitman arm shaft, that overcoat has hollow cartridge sleeve (3) between A, the B outer end, goes up at axle sleeve (3) to be oblique line by 120 ° of divisions of circle and to arrange and have 3 oilholes (4); Respectively have 3 around the both sides of axle top and the bottom at rocking arm (2) and be the oilhole (4) that " product " font is arranged, drive twice " 0 " shape oil grooves (6) at pitman arm shaft (1) middle part around axle, oil groove top also has two parallel little oilholes (4).

When engine operation, this rocking arm is gliding motility on cam, when oil pump normally is lubricated distribution device pump oil and cools off, the machine oil that splashes can by on the axle sleeve and little oilhole flow in the oblique line oil groove on the minor axis, axle sleeve and axle are lubricated and lower the temperature, and on axle, preserve a certain amount of machine oil.When the engine oil pump low on fuel or when not having oil, the oil on the minor axis oil groove can flow out from the oilhole on the cylinder, rocking arm and camshaft is lubricated and cools off, thereby avoid occurring the phenomenon generation of dry grinding, scratch and " burnings ".

In like manner, the working procedure of upper and lower rocking arm, pitman arm shaft is the same, just repeats no more.

The utility model can be widely used on 49 milliliters～1500 milliliters four-stroke engine for motor cycle, all can use rocking arm of the present utility model and axle instead as five domestic sheep, happiness and rocking arm, the axle used on the double overhead camshaft engine in the world.

Claims

1. a motorcycle " zero " wearing and tearing rocking arm and axle, form by rocking arm and central shaft thereof, it is characterized in that: this section arm that rocking arm (2) cooperates with cam work is divided into upper and lower two forearm A, B, fix the minor axis (5) parallel, that overcoat has hollow cartridge sleeve (3) between A, the B outer end, go up at axle sleeve (3) and be oblique line by 120 ° of divisions of circle and arrange and have 3 oilholes (4) with pitman arm shaft; Respectively have 3 around the both sides of axle top and the bottom at rocking arm (2) and be the oilhole (4) that " product " font is arranged, drive twice " 0 " shape oil grooves (6) at pitman arm shaft (1) middle part around axle, oil groove top also has two parallel little oilholes (4).