CN210122929U

CN210122929U - Four-stroke gasoline engine chain saw

Info

Publication number: CN210122929U
Application number: CN201920259375.8U
Authority: CN
Inventors: 李志军; 余剑
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-03-03
Anticipated expiration: 2029-02-28

Abstract

The utility model relates to a four-stroke gasoline engine chain saw, which comprises a case, wherein the middle part of the case is provided with a crankcase for accommodating a crankshaft, and the crankcase is provided with a chain lubricating oil tank, an engine lubricating oil tank and a pure gasoline tank; the side of the crankcase is provided with a cam chamber, an upper rocker arm chamber is arranged above the cam chamber, a hidden waste gas pipeline is arranged between the upper rocker arm chamber and the saw chain guide plate, an air cylinder connected with an air inlet system of the gasoline engine is arranged above the crankcase, and a silencer exhaust structure is arranged on the silencer. The utility model discloses set up the hidden waste gas pipeline between upper rocker arm room and saw chain baffle, lead to the saw chain baffle department through the hidden waste gas pipeline to the crankcase waste gas that the upper rocker arm room was discharged, utilize a small amount of machine oil in the crankcase waste gas to lubricate saw chain baffle and saw chain, realize waste gas and recycle, can not pollute the machine, economy is environmental protection again; the silencer is provided with a silencer exhaust structure, so that the temperature and airflow speed of the exhaust gas exhausted from the exhaust port are greatly reduced, and the safety standard is reached.

Description

Four-stroke gasoline engine chain saw

Technical Field

The utility model relates to a four-stroke gasoline engine chain saw.

Background

The chain saw needs to be turned over at any station in use, but the chain saw cannot adapt to various existing four-stroke engines. Because of the principle and the structural characteristics of a lubricating system of the existing various four-stroke engines, when the engine is turned over to a certain working position angle, lubricating oil of a crankcase can flow into a combustion chamber of a cylinder, so that the engine is directly caused to smoke or even extinguish, and the engine cannot normally work at all. Therefore, the production and sale of the four-stroke engine chain saw are not successful at home and abroad up to now.

In the prior art, a Chinese patent with an authorization publication number of CN105673132B discloses an invention patent of a quantitative one-way oil-gas lubricating system and a method for a four-stroke engine, solves the worldwide problem that the existing small four-stroke engine cannot be used as a chain saw engine because the existing small four-stroke engine cannot be overturned at any station, and initially designs and produces a novel four-stroke engine chain saw, and the waste gas of a crankcase of the existing four-stroke engine chain saw still contains a small amount of engine oil, so that the waste is easily caused by the pollution of machines due to improper treatment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a four-stroke gasoline engine chain saw, solve in the crankcase waste gas of current four-stroke engine chain saw because contain machine oil, pollute the problem of machine very easily.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

a four-stroke gasoline engine chain saw comprises a case, wherein the case comprises a crank case, a cylinder, a cam chamber, a gasoline engine air inlet system, an exhaust system, an upper rocker arm chamber, a silencer, a side handle, a rear handle, a chain saw guide plate and a saw chain arranged on the chain saw guide plate; the middle part of the case is provided with a crankcase for accommodating a crankshaft, and the crankcase is provided with a chain lubricating oil tank, an engine lubricating oil tank and a pure gasoline tank; a cam chamber is arranged on the side surface of the crankcase, an upper rocker arm chamber is arranged above the cam chamber, a hidden waste gas pipeline is connected between the upper rocker arm chamber and the saw chain guide plate, and a cylinder connected with an air inlet system of the gasoline engine is arranged above the crankcase; and a silencer exhaust structure is arranged on the silencer.

By adopting the technical scheme, the hidden waste gas pipeline is arranged between the upper rocker arm chamber and the saw chain guide plate, the crankcase waste gas discharged by the upper rocker arm chamber is directly communicated to the saw chain guide plate through the hidden waste gas pipeline, and the saw chain guide plate and the saw chain are lubricated by using a small amount of residual engine oil in the crankcase waste gas, so that the waste gas is reused, the waste is not easy to cause, the machine is not polluted, and the device is economical and environment-friendly; the silencer is provided with a silencer exhaust structure, so that the temperature and the airflow speed of the waste gas exhausted from the exhaust port are greatly reduced after multiple times of blocking and direction change, and the safety standard is reached.

Preferably, the hidden exhaust gas duct is disposed through the upper rocker arm chamber, the cam chamber and the crankcase.

Through adopting above-mentioned technical scheme, conceal waste gas pipeline and do not occupy extra space, and do not expose, conceal effectually, can not influence the appearance, overall structure is carefully and neatly arranged.

Preferably, the saw chain guide plate is fixed on the crankcase through a mounting seat, an oil hole is formed in the mounting seat, and the hidden waste gas pipeline is connected with the oil hole through a flow guide mechanism.

Through adopting above-mentioned technical scheme for the waste oil that hidden exhaust gas pipeline retrieved again can directly supply with saw chain baffle lubrication action, also can be lubricated connecting guide board and saw chain through oil filler point additive package oil, and is lubricated effectual, economy environmental protection again.

Preferably, muffler exhaust structure includes the gas vent, sets up the spark on the gas vent and catches the net, the gas vent top can be dismantled and be equipped with the housing, and the equal opening in both ends sets up about the housing, be equipped with the fender gas hood on the one end opening of housing, be equipped with the guide plate on the other end opening of housing.

Through adopting above-mentioned technical scheme, the vertical upwards discharge of gas vent exhaust waste gas, block through the housing and shunt to the both ends opening of housing respectively, the open-ended waste gas that the flow direction keeps off the gas cover and blocks the opening discharge of the flow direction housing other end once more through keeping off the gas cover, so set up, make gas vent exhaust waste gas through blockking the change with the direction many times, temperature and air current speed all reduce greatly, and the guide plate plays the effect of water conservancy diversion and blockking to waste gas, further reduce the air current speed of the opening part waste gas of housing through setting up the guide plate, reduce the impact of waste gas to muffler casing and gas vent, muffler long service life.

Preferably, the height of the cover shell is greater than that of the air blocking cover, and an air supplementing port is arranged between the top of the air blocking cover and the cover shell.

Through adopting above-mentioned technical scheme, in the cold air in the environment got into housing and the fender gas cover from the tonifying qi mouth, effectively reduced the temperature of waste gas on the gas vent, satisfied the safety standard.

Preferably, the gas blocking cover is an arc-shaped cover, the gas blocking cover is arranged towards an opening at one end of the housing, and the gas blocking cover is arranged at the end, back to the housing, of the housing in a sealing manner.

Through adopting above-mentioned technical scheme, keep off the effect that the gas hood played the secondary to gas vent exhaust and blockked, will keep off the gas hood setting and be the arc cover, make and keep off the gas hood and have a great appearance gas chamber, be convenient for hold more waste gases.

Preferably, the outer wall of the case is provided with an oil filling port, and the oil filling port comprises a chain lubricating oil port communicated with a chain lubricating oil tank, an engine lubricating oil port communicated with the engine lubricating oil tank, and a pure gasoline port communicated with a pure gasoline tank.

Through adopting above-mentioned technical scheme, each hydraulic fluid port dispersion sets up to ingenious avoiding each other, rationally distributed, and the maximize utilizes the space of chain saw, makes the whole occupation space of chain saw little, the during operation manual operation of being convenient for.

Preferably, the chain lubricating oil port, the engine lubricating oil port and the pure gasoline port are all arranged with the openings facing upwards.

By adopting the technical scheme, the chain saw can be erected during oil feeding, the chain saw does not need to be placed again, the oil port is adjusted to be upward, and time and labor are saved during operation.

Preferably, the chain lubricating oil port and the engine lubricating oil port are both arranged on the crankcase, and the pure gasoline port is arranged on the rear handle.

By adopting the technical scheme, the space layout is reasonably utilized, and the whole occupied space of the chain saw is small, small in size, light in weight and convenient to hold for work.

To sum up, the utility model has the advantages that:

1. the multifunctional saw chain guide plate can be turned and used at any station, a hidden waste gas pipeline is arranged between the upper rocker arm chamber and the saw chain guide plate, crankcase waste gas discharged from the upper rocker arm chamber is directly communicated to the saw chain guide plate through the hidden waste gas pipeline, and a small amount of engine oil in the crankcase waste gas is used for lubricating the saw chain guide plate and the saw chain, so that the waste gas is reused, a machine cannot be polluted, and the multifunctional saw chain guide plate is economical and environment-friendly;

2. the silencer is provided with a silencer exhaust structure, so that the temperature and the airflow speed of the waste gas exhausted from the exhaust port are greatly reduced after multiple times of blocking and direction change, and the safety standard is reached;

3. the chain lubricating oil port, the engine lubricating oil port and the pure gasoline port are arranged with the openings facing upwards, and the chain saw can be used when oiling is carried out, and the chain saw does not need to be placed again to adjust the oil ports to face upwards, so that the operation is time-saving and labor-saving.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a rear view of the present invention;

fig. 3 is a schematic structural diagram of a middle crankcase, a chain lubricating oil tank, an engine lubricating oil tank and a pure gasoline tank according to the present invention;

FIG. 4 is a schematic structural view of a silencer according to the present invention;

FIG. 5 is a schematic view of an exhaust structure of a silencer according to the present invention;

FIG. 6 is a sectional view taken along line A-A of FIG. 4;

FIG. 7 is a schematic structural view of the cover of the present invention;

fig. 8 is a schematic structural view of a deflector of the present invention;

fig. 9 is a schematic structural view of the middle gas shield of the present invention;

FIG. 10 is a schematic view of the connection of the hidden exhaust gas pipe of the present invention;

fig. 11 is a schematic structural view of the middle mounting seat and the flow guiding mechanism of the present invention.

Reference numerals:

1. a crankcase; 2. a cam chamber; 3. an upper rocker arm chamber; 4. a saw chain guide plate; 5. a concealed exhaust gas conduit; 6. a mounting seat; 7. an oil filler hole; 9. a flow guide mechanism; 91. an oil storage chamber; 92. a first oil guide groove; 93. a second oil guide groove; 94. a third oil guide groove; 10. a chassis; 11. a rear handle; 12. a chain lubricating oil tank; 13. an engine lubricating oil tank; 14. a pure gasoline tank; 15. a chain lubricating oil port; 16. an engine lubricating oil port; 17. a pure gasoline port; 21. an exhaust port; 22. a spark capture net; 23. a housing; 231. fixing the ear; 232. a fixing hole; 24. a gas shield; 241. an air containing cavity; 25. a baffle; 251. an air guide part; 2511. an air outlet; 252. a blocking part; 253. a flow dividing section; 26. an air supplement port; 27. a muffler housing.

Detailed Description

A four-stroke gasoline engine chain saw is shown in figures 1 to 11 and comprises a chassis 10, a crankcase 1, a cylinder, a cam chamber 2, a gasoline engine air inlet system, an exhaust system, an upper rocker arm chamber 3, a silencer, a side handle, a rear handle 11, a chain saw guide plate and a saw chain arranged on the chain saw guide plate; a crankcase 1 for accommodating a crankshaft is arranged in the middle of the case 10, and a chain lubricating oil tank 12, an engine lubricating oil tank 13 and a pure gasoline tank 14 are arranged on the crankcase 1; the side surface of the crankcase 1 is provided with a cam chamber 2, an upper rocker arm chamber 3 is arranged above the cam chamber 2, and a cylinder connected with an air inlet system of the gasoline engine is arranged above the crankcase 1.

As shown in fig. 1, 2 and 3, an oil filling port is formed in the outer wall of the case 10, and includes a chain lubricating oil port 15 communicated with a chain lubricating oil tank 12, an engine lubricating oil port 16 communicated with an engine lubricating oil tank 13, and a pure gasoline port 17 communicated with a pure gasoline tank 14, and the oil ports are distributed and skillfully avoided from each other, so that the layout is reasonable, the space of the chain saw is maximally utilized, the whole chain saw occupies a small space, and the manual operation is convenient during work; the chain saw oil filling port 15, the engine lubricating oil port 16 and the pure gasoline port 17 are arranged with the openings facing upwards, and a chain saw can stand when oiling is performed without placing a chain saw to adjust the oil ports facing upwards, so that the operation is time-saving and labor-saving, and the technical problem of difficulty in oiling caused by unreasonable design of the chain saw oil filling port in the prior art is thoroughly solved.

The chain lubricating oil port 15 and the engine lubricating oil port 16 are both arranged on the crankcase 1, the chain lubricating oil port 15 is connected with the chain lubricating oil tank 12, and the engine lubricating oil port 16 is connected with the engine lubricating oil tank 13; the pure gasoline port 17 is arranged on the rear handle 11, and the pure gasoline port 17 is connected with the pure gasoline tank 14.

An engine lubricating oil tank 13, a pure gasoline tank 14 and a crankcase 1 are integrally arranged; the processing and the manufacturing are convenient, the occupied space is small, the volume of the chain saw is reduced, and the whole structure is more stable; the chain lubricating oil tank 12 is independently arranged on the crankcase 1, and when the chain lubricating oil tank is damaged, the normal use of the crankcase 1 and other oil tanks is not influenced.

As shown in fig. 4 and 5, a silencer exhaust structure is arranged on the silencer, the silencer exhaust structure includes an exhaust port 21 and a spark capture net 22 arranged on the exhaust port 21, a housing 23 is detachably arranged above the exhaust port 21, openings are arranged at the left end and the right end of the housing 23, a gas blocking cover 24 is arranged on an opening at one end of the housing 23, and a guide plate 25 is arranged on an opening at the other end of the housing 23. Make the vertical upwards discharge of exhaust waste gas of gas vent 21, block through housing 23 and shunt to the both ends opening of housing 23 respectively, the open-ended waste gas that flows to fender gas cover 24 place blocks the opening discharge of the flow direction housing 23 other end once more through fender gas cover 24, so set up, make exhaust waste gas of gas vent 21 through blockking many times and the change of direction, temperature and air current speed all reduce greatly, and guide plate 25 plays water conservancy diversion and the effect of blockking to waste gas, further reduce the air current speed of the opening part waste gas of housing 23 through setting up guide plate 25, reduce the impact of waste gas to muffler casing 27 and gas vent 21, muffler long service life.

As shown in fig. 6, the height of the casing 23 is greater than that of the gas blocking cover 24, and a gas supplementing opening 26 is arranged between the top of the gas blocking cover 24 and the casing 23; the cold air in the environment enters the housing 23 and the air blocking cover 24 from the air supplementing opening 26, the temperature of the waste gas of the exhaust port 21 is effectively reduced, and the damage to the engine silencer shell 27 and the exhaust port 21 is reduced.

As shown in fig. 7, the housing 23 is arranged in a shape like "Contraband", fixing lugs 231 are arranged on both sides of the housing 23, fixing holes 232 are formed in the fixing lugs 231, the housing 23 is arranged in such a way, the time of exhausting the exhaust gas from the exhaust port 21 into the air is prolonged, and therefore the effects of reducing the temperature and the flow speed of the exhaust gas are achieved, the housing 23 is detachably arranged by inserting screws into the fixing holes 232, replacement and maintenance are facilitated, and the muffler shell 27 is better attached to the housing 23 due to the arrangement of the fixing lugs 231, and connection is stable.

As shown in fig. 8, the flow guide plate 25 includes an air guide portion 251, a blocking portion 252 and a flow dividing portion 253, the air guide portion 251 extends from the opening of the casing 23 to the air outlet 21, the blocking portion 252 is connected to the air guide portion 251 at an angle, the flow dividing portion 253 is connected to the blocking portion 252 at an angle, and the flow dividing portion 253 is provided with a plurality of air outlets 2511 at equal intervals; the diversion plate 25 is arranged in segments, wherein the gas guide portion 251 guides the exhaust gas discharged from the gas outlet 21 and the exhaust gas blocked by the gas blocking cover 24, the exhaust gas is smoothly guided to the outlet of the housing 23 far away from the gas blocking cover 24, the blocking portion 252 blocks the exhaust gas flowing through the diversion portion, the flow velocity of the exhaust gas blocked by the blocking portion 252 is further reduced, and the exhaust gas decelerated by the blocking portion 252 is uniformly discharged to the atmosphere from the gas outlet 2511 of the flow dividing portion 253.

As shown in fig. 9, the gas blocking cover 24 is an arc-shaped cover, the gas blocking cover 24 is arranged towards an opening at one end of the housing 23, the gas blocking cover 24 is arranged opposite to the opening at one end of the housing 23, the gas blocking cover 24 plays a secondary blocking role for the exhaust gas discharged from the exhaust port 21, and the gas blocking cover 24 is arranged to be an arc-shaped cover, so that the gas blocking cover 24 has a larger gas containing cavity 241, which is convenient for containing more exhaust gas.

The spark catching net 22 is made of a steel wire mesh. The steel wire mesh has higher tensile strength, fatigue resistance and impact toughness resistance, is good in wear resistance, shock resistance and corrosion resistance under the high-speed impact of the exhaust gas of the exhaust port 21, and is not easy to damage.

As shown in fig. 10 and 11, a hidden waste gas pipeline 5 is connected between the upper rocker arm chamber 3 and the saw chain guide plate 4, and the hidden waste gas pipeline 5 penetrates through the upper rocker arm chamber 3, the cam chamber 2 and the crankcase 1; according to the arrangement, waste gas of the crankcase 1 exhausted from the upper rocker arm chamber 3 is directly led to the saw chain guide plate 4 through the concealed waste gas pipeline 5, and a small amount of residual engine oil in the waste gas of the crankcase 1 is used for lubricating the saw chain guide plate 4, sawteeth and a chain, so that waste is recycled, and the device is economical and environment-friendly; the hidden waste gas pipeline 5 does not occupy extra space, is not exposed, has good hiding effect, does not influence the appearance, and has a neat and orderly integral structure.

Saw chain guide 4 passes through mount pad 6 to be fixed on crankcase 1, be equipped with oil filler point 7 on the mount pad 6, saw chain guide 4 passes through the fix with screw on mount pad 6 to fix on crankcase 1 through mount pad 6, stable in structure, the installation with dismantle the convenience.

The hidden waste gas pipeline 5 is connected with an oil injection hole 7 through a flow guide mechanism 9; with hiding waste gas pipeline 5 and the setting of oil filler point 7 intercommunication for the waste oil of hiding waste gas pipeline 5 retrieving again can directly supply with 4 lubrication actions of saw chain baffle, and lubricated effectual, economy is the environmental protection again.

The flow guide mechanism 9 comprises an oil storage cavity 91, a first oil guide groove 92, a second oil guide groove 93 and a third oil guide groove 94 which are arranged on the mounting seat 6; one end of the first oil guide groove 92 is connected with the oil storage cavity 91, and the other end is connected with the oil filling hole 7; one end of the second oil guide groove 93 is connected with the oil storage cavity 91, and the other end is connected with the third oil guide groove 94; the guide mechanism 9 is simple in structure, so that the first oil guide groove 92 is communicated with the oil injection hole 7, a good lubricating effect is achieved, the first oil guide groove 92, the second oil guide groove 93 and the third oil guide groove 94 are distributed along the edge of the saw chain guide plate 4, the saw chain guide plate 4 and a saw chain arranged on the saw chain guide plate 4 are lubricated, and the four-stroke gasoline engine chain saw is stable in work.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a four-stroke gasoline engine chain saw, includes quick-witted case, its characterized in that: the chassis comprises a crankcase, a cylinder, a cam chamber, a gasoline engine air inlet system, an exhaust system, an upper rocker arm chamber, a silencer, a side handle, a rear handle, a chain saw guide plate and a saw chain arranged on the chain saw guide plate; the middle part of the case is provided with a crankcase for accommodating a crankshaft, and the crankcase is provided with a chain lubricating oil tank, an engine lubricating oil tank and a pure gasoline tank; a cam chamber is arranged on the side surface of the crankcase, an upper rocker arm chamber is arranged above the cam chamber, a hidden waste gas pipeline is connected between the upper rocker arm chamber and the saw chain guide plate, and a cylinder connected with an air inlet system of the gasoline engine is arranged above the crankcase; and a silencer exhaust structure is arranged on the silencer.

2. The four-stroke gasoline chain saw as recited in claim 1, wherein: the concealed exhaust gas pipeline penetrates through the upper rocker arm chamber, the cam chamber and the crankcase.

3. The four-stroke gasoline chain saw as recited in claim 2, wherein: the saw chain guide plate is fixed on the crankcase through a mounting seat, an oil filling hole is formed in the mounting seat, and the hidden waste gas pipeline is connected with the oil filling hole through a flow guide mechanism.

4. The four-stroke gasoline chain saw as recited in claim 1, wherein: the silencer exhaust structure includes the gas vent, sets up the spark capture net on the gas vent, the gas vent top can be dismantled and be equipped with the housing, and the equal opening in both ends sets up about the housing, be equipped with the fender gas hood on the one end opening of housing, be equipped with the guide plate on the other end opening of housing.

5. The four-stroke gasoline chain saw as recited in claim 4, wherein: the cover casing height is greater than the gas shield height, be equipped with the tonifying qi mouth between gas shield top and the cover casing.

6. The four-stroke gasoline chain saw as recited in claim 5, wherein: the gas blocking cover is an arc-shaped cover and is arranged towards an opening at one end of the housing, and the gas blocking cover is arranged opposite to the opening at one end of the housing.

7. The four-stroke gasoline chain saw as recited in claim 1, wherein: the outer wall of the case is provided with an oil filling port, and the oil filling port comprises a chain lubricating oil port communicated with a chain lubricating oil tank, an engine lubricating oil port communicated with the engine lubricating oil tank and a pure gasoline port communicated with a pure gasoline tank.

8. The four-stroke gasoline chain saw as recited in claim 7, wherein: the chain lubricating oil port, the engine lubricating oil port and the pure gasoline port are all arranged with the openings facing upwards.

9. The four-stroke gasoline chain saw as recited in claim 8, wherein: the chain lubricating oil port and the engine lubricating oil port are both arranged on the crankcase, and the pure gasoline port is arranged on the rear handle.