Low-emission low-oil-consumption chain saw device with closed cylinder structure

Abstract

The utility model discloses a closed cylinder structure low-emission low-oil consumption chain saw device which comprises a chain saw body and an oil pan installed on the chain saw body, a crankshaft is installed in the oil pan in a rotating mode, a rotating shaft of the crankshaft penetrates out of the oil pan in a rotating mode, and a chain wheel is fixedly installed at the end of the rotating shaft. A chain saw of an electric saw can be arranged on the outer surface of the chain wheel in a sleeving mode, a closed cylinder is installed on the upper surface of the oil pan in a communicating mode, a piston is slidably installed in the closed cylinder, the piston is rotationally connected with the crankshaft through a connecting rod rotationally installed on the lower surface, and a combustion ring is installed on the upper surface of the closed cylinder in a communicating mode. The outer surface of the combustion ring is sleeved with a waste heat recovery mechanism. According to the chain saw, through the design of the waste heat recovery mechanism, low-temperature combustible mixed gas can be heated through waste gas, the atomization effect of fuel is better in cold weather, the fuel can be more evenly distributed in the combustion ring, and therefore combustion sufficiency is improved, the chain saw can be completed with less fuel consumption, and the use cost of the chain saw is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil saw, concretely to a low emission low oil consumption oil saw device of closed cylinder structure. BACKGROUND

[0002] Under the background of the current era of paying attention to environmental protection and energy conservation, oil saw, as an indispensable tool for forestry, garden operation and the like, is facing new challenges and requirements. The traditional oil saw device often has many problems in oil consumption and tail gas emission, and high oil consumption not only increases the use cost, but also causes unnecessary consumption of increasingly tense energy resources.

[0003] For example, the patent with the announcement number CN211881459U authorized by the state discloses an oil saw, which comprises an oil saw body, a saw blade and a silencer. The driving end of the oil saw body is connected with the saw blade, and the silencer is arranged on the oil saw body. The oil saw body drives the saw blade, and the silencer silences the oil saw body in the driving state. The application silences the oil saw body in the driving state through the silencer, reduces the noise generated by the oil saw body during use, avoids the harm that may be caused by long-term work in a noisy environment, and makes the entire work site in a low-noise environment that is suitable for smooth communication, thereby facilitating the work communication between the rope pulling personnel and the felling personnel and avoiding the injury caused by the mistake of the tree falling.

[0004] However, the above-mentioned silencing oil saw cannot use the heat in the exhaust gas to heat the combustible mixture in the combustion chamber and cooperate with the spark plug to ignite. When used in cold weather, the temperature of the mixture entering the combustion chamber is low, the atomization effect of the low-temperature mixture when entering the combustion chamber is poor, the burning speed is slow, and part of the fuel cannot be fully burned, which not only affects the power output of the oil saw and reduces the cutting efficiency of the saw blade, but also increases the emission of unburned fuel and causes energy waste. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a low emission low oil consumption oil saw device of closed cylinder structure to solve the problem that the heat in the exhaust gas cannot be used to heat the combustible mixture in the combustion chamber and cooperate with the spark plug to ignite.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a low emission low fuel consumption oil saw device of closed cylinder structure, include: oil saw body and install on oil saw body oil sump, rotate and install the crankshaft in the oil sump, the pivot of crankshaft rotates and goes out from the oil sump and is fixedly installed with the sprocket at the end, the outer surface of sprocket can be equipped with the chain saw of chain saw of power saw on the outer surface, the upper surface of oil sump is connected and installed with closed cylinder, the piston is slidably installed in the closed cylinder, the piston is rotatably connected with the crankshaft through the connecting rod of lower surface rotation, the upper surface of closed cylinder is connected and installed with combustion ring, the outer surface of combustion ring is equipped with the waste heat recovery mechanism, the waste heat recovery mechanism is connected with the exhaust port of one end of connecting block and is connected, connecting block is connected and installed on the upper surface of combustion ring, the other end of connecting block is provided with the air inlet.

[0008] Preferably, the upper surface of the connecting block is connected and installed with an oil top cover, the exhaust valve and the intake valve are rotatably installed in the oil top cover, the exhaust valve and the intake valve are slidably installed in the air inlet and the exhaust port respectively, and the lower surface of the connecting block is detachably installed with a spark plug.

[0009] Preferably, the air inlet of the connecting block is connected and installed with a first elbow at one end, and the other end of the first elbow is connected and installed with an air filter element.

[0010] Preferably, the upper surface of the piston is fixedly installed with an oil ring, the oil ring is funnel-shaped, the piston drives the oil ring to move upward, when the combustible mixture is compressed in the combustion ring, the oil ring can scrape off excess oil on the wall of the closed cylinder, and the oil is uniformly distributed on the wall of the closed cylinder to assist sealing.

[0011] Preferably, the waste heat recovery mechanism comprises a second elbow, the second elbow is connected and installed at one end of the exhaust port of the connecting block, the other end of the second elbow is connected and installed with a U-shaped heat preservation ring, and the U-shaped heat preservation ring is sleeved and installed on the outer surface of the combustion ring.

[0012] Preferably, the other end of the outer surface of the U-shaped heat preservation ring is provided with an exhaust strip opening.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、Through the design of closed cylinder, combustion ring, exhaust hole, intake hole, piston and waste heat recovery mechanism, when in use, the piston can be driven by the crankshaft to move downward in the closed cylinder, and the piston will open the intake valve during the downward movement, so that the piston can extract external air through the intake hole of the connecting block, and then the air can enter the closed cylinder after being filtered by the air filter, in this process, the electronic fuel injection system will inject appropriate amount of fuel into the closed cylinder according to the size of the throttle to mix with the air to form combustible mixture, then the piston moves upward to compress the combustible mixture into the segment of the combustion ring, until the piston approaches the top dead center, the spark plug ignites to release a large amount of energy to drive the piston to move downward, drive the crankshaft to rotate and output power, and at the same time, the exhaust gas is discharged, and the exhaust gas will enter the waste heat recovery mechanism through the exhaust hole at one end of the connecting block, and the waste heat recovery mechanism will guide the high-temperature exhaust gas to the outer surface of the combustion ring, so that the high temperature is transmitted to the combustion ring before being discharged, and the heated combustion ring can heat the combustible mixture inside, so that the combustible mixture can be in a high-temperature environment, the fuel can be atomized more fully and mixed more uniformly with the air, the combustion time is shortened, and the incomplete combustion phenomenon is reduced, and through the full combustion of the mixture, the speed of the chain saw driven by the transmission can be accelerated, so that the staff can reduce the throttle while ensuring the faster speed of the chain saw, reduce fuel consumption, prolong the continuous operation time, and reduce the emission of carbon monoxide (CO), hydrocarbons (HC) and particulate matter (PM) through full combustion.

[0015] 2、Through the design of the second bend, the exhaust strip opening and the U-shaped heat preservation ring, after the piston moves upward to compress the combustible mixture into the segment of the combustion ring, the spark plug ignites the combustible mixture to release a large amount of energy to drive the piston to move downward, drive the crankshaft to rotate and output power, and at the same time, the exhaust gas is discharged, and the exhaust gas will enter the second bend through the exhaust hole at one end of the connecting block, and the second bend will guide the high-temperature exhaust gas to the U-shaped heat preservation ring, and the U-shaped heat preservation ring is sleeved on the outer surface of the combustion ring, so that the high-temperature exhaust gas is blown through the outer surface of the combustion ring and discharged from the exhaust strip opening opened at the other end of the outer surface, and the heated combustion ring can heat the low-temperature combustible mixture, so that the originally cold mixture can be heated in cold weather, the atomization effect of the fuel is better, and the fuel can be more uniformly distributed in the combustion ring, so that the combustion completeness is improved, and the chain saw can complete the same work task with less fuel consumption, thereby saving energy and reducing the use cost of the chain saw. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a whole structure schematic view of the utility model;

[0017] Fig. 2The structure diagram of the exhaust hole and the air inlet hole of the utility model;

[0018] Fig. 3 The structure diagram of the waste heat recovery mechanism and the combustion ring of the utility model.

[0019] In the figure: 1, connecting block; 101, oil top cover; 102, first elbow; 103, air filter element; 104, closed cylinder; 105, oil pan; 106, chain wheel; 107, combustion ring; 108, exhaust hole; 109, oil ring; 110, crankshaft; 111, air inlet hole; 112, piston; 2, waste heat recovery mechanism; 201, second elbow; 202, exhaust strip opening; 203, U-shaped heat preservation ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figs. 1-3 The embodiment provides the following technical scheme:

[0022] As Figs. 1-2 shown, a low-emission and low-oil-consumption oil saw device with a closed cylinder structure comprises an oil saw body and an oil pan 105 mounted on the oil saw body. A crankshaft 110 is rotatably installed in the oil pan 105. The rotating shaft of the crankshaft 110 extends out of the oil pan 105 and is fixedly installed at the end. A chain wheel 106 is provided on the outer surface of the chain wheel 106, and the chain saw of the chainsaw can be sleeved on the outer surface. A closed cylinder 104 is installed in communication with the upper surface of the oil pan 105. A piston 112 is slidably installed in the closed cylinder 104. The piston 112 is rotatably connected to the crankshaft 110 through a connecting rod installed on the lower surface. A combustion ring 107 is installed in communication with the upper surface of the closed cylinder 104. A waste heat recovery mechanism 2 is sleeved on the outer surface of the combustion ring 107. The waste heat recovery mechanism 2 is in communication with an exhaust hole 108 formed at one end of a connecting block 1. The connecting block 1 is installed in communication with the upper surface of the combustion ring 107. An air inlet hole 111 is formed at the other end of the connecting block 1.

[0023] The upper surface of the connecting block 1 is installed in communication with an oil top cover 101. An exhaust valve and an intake valve are rotatably installed in the oil top cover 101. The exhaust valve and the intake valve are slidably installed in the air inlet hole 111 and the exhaust hole 108, respectively. A spark plug is detachably installed on the lower surface of the connecting block 1. A first elbow 102 is installed in communication with one end of the air inlet hole 111 of the connecting block 1. The other end of the first elbow 102 is installed in communication with an air filter element 103.

[0024] The upper surface of the piston 112 is fixedly installed with an oil ring 109, which is funnel-shaped, so that the piston 112 drives the oil ring 109 to move upward, and when the combustible mixture is compressed in the combustion ring 107, the oil ring 109 can scrape off excess engine oil on the wall of the closed cylinder 104 and uniformly distribute the engine oil on the wall of the closed cylinder 104 to assist in sealing.

[0025] Through the design of the closed cylinder 104, the combustion ring 107, the exhaust hole 108, the intake hole 111, the piston 112, and the waste heat recovery mechanism 2, when in use, the crankshaft 110 drives the piston 112 to move downward in the closed cylinder 104, and in the process of moving downward, the piston 112 opens the intake valve together, so that the piston 112 can draw external air through the intake hole 111 of the connecting block 1, and then the air filtered by the air filter element 103 enters the closed cylinder 104 through the first elbow pipe 102. In this process, the electronic fuel injection system sprays an appropriate amount of fuel into the closed cylinder 104 according to the size of the throttle to mix with the air to form a combustible mixture. Then, the piston 112 moves upward to compress the combustible mixture into the segment of the combustion ring 107, until the piston 112 approaches the top dead center, the spark plug ignites to ignite the combustible mixture and release a large amount of energy, which drives the piston 112 to move downward and drives the crankshaft 110 to rotate and output power while discharging exhaust gas. The exhaust gas discharged through the exhaust hole 108 at one end of the connecting block 1 enters the waste heat recovery mechanism 2, and the waste heat recovery mechanism 2 guides the high-temperature exhaust gas to the outer surface of the combustion ring 107, so that the high temperature is transmitted to the combustion ring 107 before being discharged. The heated combustion ring 107 can heat the combustible mixture inside, so that the combustible mixture is in a high-temperature environment, which can make the fuel atomize more fully and mix with the air more uniformly, shorten the time required for combustion, and reduce the phenomenon of incomplete combustion. Through the full combustion of the mixture, the speed of the chain saw driven can be accelerated, so that the worker can reduce the throttle while ensuring a faster speed of the chain saw, reduce fuel consumption, prolong the continuous operation time, and reduce the emission of carbon monoxide CO, hydrocarbons HC, and particulate matter PM.

[0026] As shown in Fig. 3 The waste heat recovery mechanism 2 includes a second elbow pipe 201, which is installed in communication at one end of the exhaust hole 108 of the connecting block 1. The other end of the second elbow pipe 201 is installed in communication with a U-shaped heat preservation ring 203, which is sleeved and installed at the outer surface of the combustion ring 107. The outer surface of the U-shaped heat preservation ring 203 is provided with an exhaust strip opening 202 at the other end.

[0027] Through the design of the second elbow pipe 201, the exhaust port 202 and the delta-shaped heat preservation ring 203, when the piston 112 moves upward to compress the combustible mixture into the segment of the combustion ring 107, the spark plug can ignite the combustible mixture to release a large amount of energy, thereby pushing the piston 112 to move downward, driving the crankshaft 110 to rotate and output power, and at the same time, the exhaust gas is discharged. The exhaust gas discharged will enter the second elbow pipe 201 through the exhaust hole 108 at one end of the connecting block 1, and the second elbow pipe 201 will guide the high-temperature exhaust gas to the delta-shaped heat preservation ring 203, which is sleeved on the outer surface of the combustion ring 107. Thus, the high-temperature exhaust gas can be blown from the outer surface of the combustion ring 107 and discharged from the exhaust port 202 opened at the other end of the outer surface. The heated combustion ring 107 can heat the low-temperature combustible mixture, so that the originally cold mixture can be heated to better atomize the fuel and more evenly distribute in the combustion ring 107, thereby improving the completeness of combustion, so that the chainsaw can complete the same work task with less fuel consumption, thereby saving energy and reducing the use cost of the chainsaw.

[0028] According to the above technical scheme, the working steps of the present scheme are summarized and combed: in use, the crankshaft 110 drives the piston 112 to move downward in the closed cylinder 104, and the piston 112 opens the intake valve during downward movement, so that the piston 112 can draw external air through the intake hole 111 of the connecting block 1, and then the air filtered by the air filter 103 enters the closed cylinder 104 through the first elbow pipe 102. In this process, the electronic fuel injection system injects an appropriate amount of fuel into the closed cylinder 104 according to the size of the throttle to mix with the air to form a combustible mixture. Then, the piston 112 moves upward to compress the combustible mixture into the segment of the combustion ring 107, until the piston 112 approaches the top dead center, the spark plug ignites to release a large amount of energy, thereby pushing the piston 112 to move downward, driving the crankshaft 110 to rotate and output power, and at the same time, the exhaust gas is discharged. The exhaust gas discharged will enter the second elbow pipe 201 through the exhaust hole 108 at one end of the connecting block 1, and the second elbow pipe 201 will guide the high-temperature exhaust gas to the delta-shaped heat preservation ring 203, which is sleeved on the outer surface of the combustion ring 107. Thus, the high-temperature exhaust gas can be blown from the outer surface of the combustion ring 107 and discharged from the exhaust port 202 opened at the other end of the outer surface. The heated combustion ring 107 can heat the low-temperature combustible mixture, so that the originally cold mixture can be heated to better atomize the fuel and more evenly distribute in the combustion ring 107, thereby improving the completeness of combustion, so that the chainsaw can complete the same work task with less fuel consumption, thereby saving energy and reducing the use cost of the chainsaw.

[0029] In summary: by using the exhaust gas to heat the low-temperature combustible mixture, the fuel atomization effect is better in cold weather, which can be more evenly distributed in the combustion ring 107, thereby improving the completeness of combustion, and then the chainsaw can complete the same work task with less fuel consumption, thereby saving energy and reducing the use cost of the chainsaw.

[0030] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A closed-cylinder structure, low-emission, low-fuel-consumption chainsaw device, characterized in that, include: The chainsaw body and an oil pan (105) mounted on the chainsaw body. A crankshaft (110) is rotatably mounted inside the oil pan (105). The shaft of the crankshaft (110) rotates out of the oil pan (105) and a sprocket (106) is fixedly mounted at its end. The outer surface of the sprocket (106) can accommodate the chainsaw's chainsaw sleeve. A closed cylinder (104) is connected to the upper surface of the oil pan (105). A piston (112) is slidably mounted inside the closed cylinder (104). The piston (112) is rotatably connected to the crankshaft (110) via a connecting rod rotatably mounted on its lower surface. A combustion ring (107) is mounted on the upper surface of the closed cylinder (104). A waste heat recovery mechanism (2) is fitted on the outer surface of the combustion ring (107). The waste heat recovery mechanism (2) is connected to a connecting block (1) with an exhaust port (108) at one end. The connecting block (1) is mounted on the upper surface of the combustion ring (107). An air inlet port (111) is opened at the other end of the connecting block (1).

2. The closed-cylinder structure low-emission, low-fuel-consumption chainsaw device according to claim 1, characterized in that: An oil cap (101) is installed on the upper surface of the connecting block (1). An exhaust valve and an intake valve are rotatably installed inside the oil cap (101). The exhaust valve and the intake valve are slidably installed in the intake hole (111) and the exhaust hole (108), respectively. A spark plug is detachably installed on the lower surface of the connecting block (1).

3. The closed-cylinder structure low-emission, low-fuel-consumption chainsaw device according to claim 2, characterized in that: One end of the air inlet (111) of the connecting block (1) is connected to a first bent pipe (102), and the other end of the first bent pipe (102) is connected to an air filter (103).

4. The low-emission, low-fuel-consumption chainsaw device with a closed-cylinder structure according to claim 1, characterized in that: An oil ring (109) is fixedly installed on the upper surface of the piston (112). The oil ring (109) is funnel-shaped. When the piston (112) drives the oil ring (109) to move upward, the combustible mixture is compressed into the combustion ring (107), so that the oil ring (109) can scrape off the excess oil on the wall of the closed cylinder (104) and make the oil evenly distributed on the wall of the closed cylinder (104) to assist in sealing.

5. A closed-cylinder structure low-emission, low-fuel-consumption chainsaw device according to claim 1, characterized in that: The waste heat recovery mechanism (2) includes a second bend (201), which is connected to one end of the exhaust hole (108) of the connecting block (1), and the other end of the second bend (201) is connected to a U-shaped heat preservation ring (203), which is fitted onto the outer surface of the combustion ring (107).

6. A closed-cylinder structure low-emission, low-fuel-consumption chainsaw device according to claim 5, characterized in that: The outer surface of the U-shaped insulation ring (203) has an exhaust vent (202) at the other end.

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