CN2755290Y

CN2755290Y - Valve gap automatic adjuster of engine for motorcycle

Info

Publication number: CN2755290Y
Application number: CN200420105536.1U
Authority: CN
Inventors: 周曼桦
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-10
Filing date: 2004-12-10
Publication date: 2006-02-01
Anticipated expiration: 2014-12-10

Abstract

The utility model relates to a valve gap automatic adjuster for an engine of a motorcycle. The handle parts of a plunger (1) are symmetrically provided with chamfered edges, screw threads are arranged residual circular arc surfaces, the large head end of the plunger (1) is provided with step counterbores, the roots of plunger handles are drilled with side bores (8), and the large head end of the plunger extends into a hollow cavity of an adjuster body (3); a valve frame (7) and a steel ball (4) are arranged in the step counterbores of the large head end of the plunger, the valve frame (7) is supported by a spring (5) in the adjuster body (3), an elastic member (6) is arranged on the valve frame (7), the steel ball (4) is arranged above the elastic member (6) and is in contact with a bore port of a center bore on the large head end of the plunger, and the middles of the elastic member (6) and the valve frame (7) are provided with bores. Before leaving a factory, an engine of a motorcycle does not need to be provided with a valve gap, a valve of the engine does not need to be periodically checked and adjusted, the engine has no valve knocking sound, therefore the utility model reduces the noise of the engine and keeps the excellent follow-up performance of an air distributing mechanism.

Description

Motorcycle engine valve clearance automatic regulator

Technical field

The utility model relates to the motorcycle engine accessory, especially a kind of motorcycle engine valve clearance automatic regulator.

Background technique

The valve clearance automatic regulator is installed on the motorcycle engine inlet and outlet door rocking arm, and its end is made up interior inlet and outlet door boom end with cylinder head and contacted.Motorcycle is in normal the use, rotation along with engine crankshaft, distribution device is started working, valve rocker is done reciprocal motion under action of cam, promoting the unlatching of valve and closing of valve, allow fresh mixing air enter combustion chambers burn, allow waste gas after burning discharge simultaneously, along with motor enters normal working state, distribution device can be subjected to the variation of ambient temperature and produce the phenomenon of expanding with heat and contract with cold, cause valve situation about can not close fully to occur, cause that engine power descends and parts damage.For sort this problem out, present motorcycle engine accesses certain clearance (being commonly called as the valve clearance) with adjusting screw rod on the rocking arm and adjusting nut at valve end before dispatching from the factory, to eliminate the problem of expanding with heat and contract with cold and causing of engine valve actuating mechanism.But along with the motor prolongation of service time, wearing and tearing appear in the motor parts that comprise distribution device, the valve clearance that distribution device is reserved increases, it is unpunctual to cause that valve opens and closes, be to change the distribution time, cause the increase of engine power reduction and fuel consume, increased the valve knock of motor simultaneously.For eliminating this phenomenon, the user regularly checks the valve clearance of motor and adjusts with regard to needing, and like this, will bring a lot of inconveniences to the user, and because the qualification difference of adjustment technology can not really solve this bad phenomenon exactly.

Summary of the invention

The purpose of this utility model provides a kind of motorcycle engine valve clearance automatic regulator, solve that expanding with heat and contract with cold appears in existing motorcycle engine distribution device and the power that brings descends, oil consumption increases, and valve knock becomes bad phenomenon and the reason that causes that greatly engine noise increases.

In order to achieve the above object, the technical solution of the utility model is: a kind of motorcycle engine valve clearance automatic regulator, it is characterized in that: the plunger cross section is a T type structure, plunger grip symmetry chamfered edge, and on the residue arc surface, be shaped on screw thread, the stub end of plunger has stepped counterbore, is drilled with side opening at the root of plunger handle, and this hole communicates with the center hole of plunger; It is interior and spacing by the back-up ring of its opening that the stub end of plunger stretches into the cavity of adjusting body, vavle shelf and steel ball are housed in the stepped counterbore of plunger stub end, wherein vavle shelf is supported by the spring of adjusting in the body, flexible member on the vavle shelf, the resilient member top is a steel ball, steel ball contacts in the center hole aperture of plunger stub end, and this center hole is closed or opened; Middle part at resilient member and vavle shelf has the hole.

The plunger stub end stretches into and adjusts in the body in this programme, this plunger stub end upper end is spacing by back-up ring, the lower end is spacing by spring, and because the effect of resilient member can make the steel ball at plunger stub end cavity place that the plunger center hole is initially contacted, when plunger moves downward, machine oil in the high-pressure oil chamber is under pressure and makes the center hole of steel ball sealing plunger, vavle shelf like this, belleville spring, steel ball, the closed check valve that plunger is formed, cause high-pressure oil chamber's sealing, because the incompressibility of machine oil, thereby moment locked plunger and adjust the relative movement of body, under the effect of plunger, move upward at spring, the pressure that steel ball is subjected to also disappears, steel ball leaves the plunger center hole, vavle shelf, belleville spring, steel ball, the one-way valve that plunger is formed is ineffective, the machine oil of accumulator flows to the hyperbaric chamber, valve heads on the adjustment body under the effect of restoring force begins to close, circulation and so forth, valve clearance automatic regulator body makes valve stem and rocking arm realize the motion of no gap under the variation of ambient temperature around, kept the good servo-actuated of valve and distribution device, make motorcycle engine be in work under the good distribution state, the cylinder head noise when having reduced engine operation greatly all the time.

The utility model has the advantages that: motorcycle engine need not be reserved the valve clearance before dispatching from the factory, need not carry out valve inspection and adjustment regularly to motor, the apneustic knock of motor has improved the noise of motor, and has kept the good servo-actuated of distribution device.

Description of drawings

Accompanying drawings describes the utility model

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the plan view of plunger 1 in the utility model;

Fig. 3 is that conventional regulator is installed in the situation on the motor;

Fig. 4 is that the utility model is installed in the situation on the motor.

Embodiment

The structure of the utility model motorcycle engine usefulness valve clearance automatic regulator as shown in Figure 1 and Figure 2, constitute by plunger 1, back-up ring 2, adjustment body 3, steel ball 4, spring 5, belleville spring 6, vavle shelf 7, wherein plunger 1 cross section is a T type structure, plunger 1 shank symmetry chamfered edge, and on the residue arc surface, be shaped on screw thread, the stub end of plunger 1 has stepped counterbore, is drilled with side opening 8 at the root of plunger handle, and this hole communicates with the center hole of plunger 1; It is interior and spacing by the back-up ring 2 of its opening that the stub end of plunger stretches into the cavity of adjusting body 3, form high-pressure oil chamber between the stub end stepped counterbore face of its plunger and the regulator inner chamber, vavle shelf 7 and steel ball 4 are housed in the stepped counterbore of plunger stub end, wherein vavle shelf 7 is supported by the spring of adjusting in the body 35, flexible member 6 on the vavle shelf 7, resilient member 6 tops are steel ball 4, and steel ball 4 contacts in the center hole aperture of plunger stub end, and this center hole is closed or opened; Middle part at resilient member 6 and vavle shelf 7 has the hole.Threaded plunger 1 shank stretches in the tapped hole of rocking arm and by locking nut and locks.In Fig. 3, Fig. 4,9 expression the utility model, 10 expression rocking arms, 11 expression valves, wherein the utility model 9 is made of plunger 1, back-up ring 2, adjustment body 3, steel ball 4, spring 5, belleville spring 6, vavle shelf 7.

As shown in Figure 1: described resilient member 6 is a belleville spring; Vavle shelf 7 is dish-shaped vavle shelf.

Working principle of the present utility model is: when motorcycle engine is not worked, because the effect of spring 5 promotes to adjust body 3 and plunger 1 two ends promotion up and down respectively, the lower end of adjusting body 3 is contacted with valve end, eliminated the gap between valve and rocking arm, high-pressure oil chamber and accumulator have been formed in the inside of adjusting body 3, along with motor is started working, when moving under the drive of rocking arm at cam, plunger 1 moves downward, machine oil in the high-pressure oil chamber is under pressure steel ball 4 is moved to plunger 1 center port, vavle shelf 7, belleville spring 6, steel ball 4, the closed check valve that plunger 1 is formed, cause high-pressure oil chamber's sealing, because the incompressibility of machine oil, thereby moment locked plunger 1 and adjust the relative movement of body 3, adjustment body 3 is also moved downward immediately push valve open, when cam turns over atdc; rocking arm reduces active force until consumption power; plunger 1 moves upward under the effect of spring 5; engine oil pressure that steel ball 4 is subjected to also disappears; one-way valve is ineffective; the machine oil of accumulator flows to the hyperbaric chamber; valve heads under the effect of restoring force to be adjusted body 3 and begins to close; circulation and so forth; valve clearance automatic regulator body 3 makes valve stem and rocking arm realize the motion of no gap under the variation of ambient temperature around; kept the good servo-actuated of valve and distribution device; motorcycle engine is in good distribution state under all the time works the cylinder head noise when having reduced engine operation greatly.

Claims

1, a kind of motorcycle engine valve clearance automatic regulator, it is characterized in that: plunger (1) cross section is a T type structure, plunger (1) shank symmetry chamfered edge, and on the residue arc surface, be shaped on screw thread, the stub end of plunger (1) has stepped counterbore, root in plunger handle is drilled with side opening (8), and this hole communicates with the center hole of plunger (1); It is interior and spacing by the back-up ring (2) of its opening that the stub end of plunger stretches into the cavity of adjusting body (3), vavle shelf (7) and steel ball (4) are housed in the stepped counterbore of plunger stub end, wherein vavle shelf (7) is supported by the spring of adjusting in the body (3) (5), vavle shelf (7) is gone up flexible member (6), resilient member (6) top is steel ball (4), steel ball (4) contacts in the center hole aperture of plunger stub end, and this center hole is closed or opened; Middle part at resilient member (6) and vavle shelf (7) has the hole.

2, motorcycle engine according to claim 1 valve clearance automatic regulator is characterized in that: described resilient member (6) is a belleville spring; Vavle shelf (7) is dish-shaped vavle shelf.