CN2312328Y

CN2312328Y - Rotary type sliding valve air filling mechanism

Info

Publication number: CN2312328Y
Application number: CN 97227313
Authority: CN
Inventors: 贾强
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-22
Filing date: 1997-09-22
Publication date: 1999-03-31
Anticipated expiration: 2007-09-22

Abstract

The utility model discloses a rotary type air valve air distributing mechanism for a four-stroke engine, which comprises a cylinder head which is arranged in a cylinder body and a sprocket gear which is connected with an air valve and a piston to be synchronously moved. A cylindrical air valve cavity is arranged in the cylinder head and is provided with a cylindrical air valve whose assembling surface is provided with an air admission groove and an exhaust groove in the air valve cavity. The grooves on the air valve are respectively communicated with an air admission cavity and an exhaust cavity which are provided with air admission pipes and exhaust pipes by lateral holes. Two rectangular holes which are communicated with the inner cavity of the cylinder body are arranged on the cylinder cover which is corresponding to the grooves on the air valve. The rotary type air valve air distributing mechanism for a four-stroke engine has simple structure, low production cost, good work performance and long service life.

Description

Rotary valve distribution mechanism

The utility model relates to motor, is specifically the inlet and exhaust system of existing four stroke engine is changed a social system and a kind of rotary valve distribution mechanism that designs.

Existing four stroke engine is to replace the roof pressure valve stem by two cams that the bent axle link chain mechanism drives on the timing chain wheel shaft, makes the inlet and outlet door close and open, thereby finishes the work.There is following shortcoming in it:

1, cylinder head complex structure, the cost of production height is prone to fault;

2, cam very easily weares and teares, and influences the accuracy of mechanism's operation;

3, the resistance that need overcome self two valve spring at work owing to motor has lost certain output power.

The purpose of this utility model is to provide at above-mentioned problems of the prior art a kind of simple in structure, reliable, rotary valve distribution mechanism that working resistance is little.

The technological scheme that realizes above-mentioned purpose is: a kind of rotary valve distribution mechanism, have the cylinder cap that is disposed on the cylinder body and be connected valve and the piston sprocket wheel that is synchronized with the movement, in cylinder cap, be provided with a cylindrical valve chamber, be equipped with the valve that cylindric both sides are provided with running shaft in its chamber, the valve both sides constitute air-inlet cavity with the valve chamber and also are connected respectively into exhaust cavity, outlet pipe, on the cylndrical surface of valve, offer two rectangular recess that interlace in axial and radial position, correspondingly with this groove on cylinder cap, offer two rectangular holes and be communicated with inner chamber of cylinder block, on the valve bi-side, be respectively equipped with inlet hole and exhaust port air-inlet cavity and exhaust cavity are communicated with each self-corresponding rectangular recess respectively.

The utility model is compared with existing distribution device has following advantage:

1, because it is simple in structure, cost of production can reduce greatly;

2, owing to the change of motion mode, avoided the hard collision of each parts, both reduced the noise of mechanism's operation, significantly reduced the wearing and tearing of component again, improved the working life of mechanism;

3, consume bigger element owing to having saved cam and valve spring constant power, thereby increased the output power of motor.

Accompanying drawing is rotary valve distribution mechanism structure and and engine cylinder-body configuration status master sectional view.

The utility model is described in further detail below in conjunction with drawings and Examples.

Provide as accompanying drawing, this distribution device has the cylinder cap 3 that is disposed on the cylinder body 1, is provided with a cylindrical valve chamber in cylinder cap 3, is equipped with the cylindric valve 5 of both sides band running shaft in the valve chamber.After valve 5 was assemblied in the valve cavity, bi-side and valve chamber constituted air-inlet cavity and exhaust cavity.Be provided with suction tude and outlet pipe is communicated with air-inlet cavity and exhaust cavity respectively in the side of cylinder cap.Offering two rectangular recess 6, two groove location on the cylndrical surface of valve axially and is radially interlacing.Corresponding two rectangular holes 7 that offer on cylinder cap 3 with the rectangular recess on the valve 5 are communicated with inner chamber of cylinder block.Between each rectangular recess and valve side, offer and porose groove, corresponding air-inlet cavity and suction tude and exhaust cavity and outlet pipe are communicated with.One sideway swivel axle of valve 5 extend out to outside the valve chamber, and its axle head is equipped with and connects the sprocket wheel 4 that valve and piston 2 are synchronized with the movement.

Claims

1, a kind of rotary valve distribution mechanism, comprise the cylinder cap (3) that is disposed on the cylinder body (1) and be connected valve and piston (2) sprocket wheel (4) that is synchronized with the movement, it is characterized in that: in cylinder cap (3), be provided with a cylindrical valve chamber, be equipped with the valve (5) that cylindric both sides are provided with running shaft in its chamber, the valve both sides constitute air-inlet cavity with the valve chamber and also are connected respectively into exhaust cavity, outlet pipe, on the cylndrical surface of valve, offer two rectangular recess that interlace in axial and radial position, correspondingly with this groove on cylinder cap, offer two rectangular holes and be communicated with inner chamber of cylinder block, on the valve bi-side, be respectively equipped with inlet hole and exhaust port air-inlet cavity and exhaust cavity are communicated with each self-corresponding rectangular recess respectively.