High-power low-oil-consumption portable handheld mower

Abstract

The utility model discloses a portable handheld mower with high power and low oil consumption, which comprises an engine and a machine tool, an output shaft of the engine is in transmission connection with the machine tool, the engine comprises a cylinder body, a cylinder hole is arranged in the cylinder body, a piston is arranged in the cylinder hole, a combustion chamber is arranged at the top of the cylinder hole, a spark plug is arranged at the top end of the combustion chamber, and the combustion chamber is trumpet-shaped. The combustion chamber is sequentially divided into a first expansion section, a second expansion section and a third expansion section from top to bottom, the inclination angle of the inner wall of the first expansion section is controlled between 58 degrees and 62 degrees, the inclination angle of the inner wall of the second expansion section is controlled between 35 degrees and 40 degrees, the inclination angle of the inner wall of the third expansion section is controlled between 10 degrees and 13 degrees, and the cylinder body is made of magnesium alloy. A casing pipe made of aluminum alloy is embedded in the inner wall of a cylinder hole, the machine tool comprises a round pipe connected with an engine, and the round pipe is made of thin-wall carbon fiber, so that the technical effects of light structure, high power and low oil consumption are achieved, the burden of people is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of lawn mowers, in particular to a high-power, low-fuel-consumption, lightweight handheld lawn mower. Background Art

[0002] As a gardening equipment, the lawn mower needs to be carried and operated manually during use. If the existing lawn mower uses a high-power engine, the engine is heavy, and the operator has a heavy burden during the carrying process, which greatly affects the operator's labor efficiency. The high-power engine also brings high fuel consumption, which increases the operator's cost and requires frequent refueling, which is extremely inconvenient. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a high-power, low-fuel-consumption, lightweight handheld lawn mower with a light structure, thereby greatly reducing the burden on the operator and improving work efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-power, low-fuel-consumption, lightweight handheld lawn mower, comprising an engine and a tool, wherein the output shaft of the engine is connected to the tool in a transmission manner, the engine comprising a cylinder body, a cylinder hole is arranged in the cylinder body, a piston is arranged in the cylinder hole, a combustion chamber is arranged at the top of the cylinder hole, a spark plug is arranged at the top of the combustion chamber, the combustion chamber is trumpet-shaped, and the combustion chamber is divided into a first expansion section, a second expansion section and a third expansion section from top to bottom, the inner wall inclination angle of the first expansion section is controlled between 58°-62°, the inner wall inclination angle of the second expansion section is controlled between 35°-40°, and the inner wall inclination angle of the third expansion section is controlled between 10°-13°, the cylinder body is made of magnesium alloy, and a sleeve made of aluminum alloy is inlaid on the inner wall of the cylinder hole, the tool comprises a round tube connected to the engine, the round tube is made of thin-walled carbon fiber, a transmission shaft connected to the output shaft of the engine in a transmission manner is arranged in the round tube, and a blade is arranged at the end of the transmission shaft.

[0005] A U-shaped hand-held frame is also arranged on the circular tube, one end of the hand-held frame is provided with a throttle switch, and the other end is a grip.

[0006] The engine also includes a transmission box body, the round tube is connected to the transmission box body, the engine output shaft is arranged in the transmission box body, and the transmission box body is a thin-wall hollow structure.

[0007] The beneficial effects of the utility model are as follows: 1. After the gas in the combustion chamber is ignited by the spark plug, it expands rapidly three times continuously, obtaining a sound amplification effect similar to that of a loudspeaker, releasing a huge thrust to drive the piston to move, thereby increasing power;

[0008] 2. Because the combustion chamber is trumpet-shaped, when the piston moves upward to squeeze the combustion chamber gas, the gas is guided along the top of the piston from the third expansion section to the second expansion section and the first expansion section, and then flows along the inner wall of the combustion chamber. The gas generates a vortex during the movement, making the gas in the combustion chamber more uniform in a short time. After the spark plug is ignited, the gas burns more stably and the flame propagates more quickly, achieving the effect of high power and low fuel consumption.

[0009] 3. Since the cylinder body is made of magnesium alloy, the inner wall of the cylinder hole is inlaid with an aluminum alloy sleeve, and the round tube is made of thin-walled carbon fiber, the overall weight is greatly reduced, making the structure light, thereby greatly reducing the burden on the operator and improving work efficiency.

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0012] Figure 2 It is a three-dimensional diagram of an engine in a specific implementation manner of the utility model;

[0013] Figure 3 It is a cross-sectional view of the engine cylinder hole in a specific embodiment of the utility model;

[0014] Figure 4 It is a cross-sectional view of the position of the combustion chamber in a specific implementation manner of the utility model. DETAILED DESCRIPTION

[0015] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0016] like Figure 1 — Figure 4As shown, this embodiment discloses a high-power, low-fuel-consumption, lightweight handheld lawn mower, including an engine 1 and a tool 2, wherein the output shaft of the engine 1 is drivingly connected to the tool 2, the engine 1 includes a cylinder body 11, a cylinder hole 13 is arranged in the cylinder body 11, a piston is arranged in the cylinder hole 13, a combustion chamber 3 is provided at the top of the cylinder hole 13, a spark plug is arranged at the top of the combustion chamber 3, the combustion chamber 3 is trumpet-shaped, and the combustion chamber 3 is divided into a first expansion section 31, a second expansion section 32 and a third expansion section 33 from top to bottom, the inner wall inclination angle B of the first expansion section 31 is controlled between 58° and 62°, and the inner wall inclination angle C of the second expansion section 32 is controlled between 58° and 62°. The inner wall inclination angle D of the third expansion section 33 is controlled between 35° and 40°, and the inner wall inclination angle D of the third expansion section 33 is controlled between 10° and 13°, so that the combustion gas in the combustion chamber 3 is guided to flow efficiently. The cylinder body 11 is made of magnesium alloy, and a sleeve 14 made of aluminum alloy is inlaid on the inner wall of the cylinder hole 13. The machine 2 includes a circular tube 21 connected to the engine 1. The circular tube 21 is made of thin-walled carbon fiber material, which is 40% lighter than that of aluminum alloy material, thereby reducing the weight of the entire lawn mower. A transmission shaft connected to the output shaft of the engine 1 is arranged in the circular tube 21, and a blade 22 is arranged at the end of the transmission shaft, and an arc-shaped sheath 23 is also arranged on the side of the blade 22.

[0017] A U-shaped hand-held frame 24 is also disposed on the circular tube 21, and a throttle switch 241 is disposed at one end of the hand-held frame 24, and a grip 242 is disposed at the other end. This makes it very convenient to operate.

[0018] The engine 1 also includes a transmission box 12, which is equipped with large gears and small gears that mesh with each other for transmission output. The round tube 21 is connected to the transmission box. The output shaft of the engine 1 is arranged in the transmission box 12 and outputs power to the transmission shaft through large and small gears. The transmission box 12 is a thin-walled hollow structure, which can further reduce the weight of the lawn mower.

[0019] Here we need to explain in detail: the existing cylinder body 11 material on the market is aluminum alloy or aluminum alloy embedded in iron sleeve, while the cylinder body 11 of this invention is magnesium alloy embedded in aluminum alloy, the density of magnesium alloy is 1.8g / cm3, the density of aluminum alloy is 2.6-2.8 g / cm3, and the weight of magnesium alloy is about 1 / 3 of that of aluminum alloy. The material of the transmission case 12 is changed from aluminum alloy to magnesium alloy, with thin-wall hollow lightweight design, and the weight is reduced by 1 / 3.

[0020] The above technical solution can achieve the following effects: 1. After the combustion gas in the combustion chamber 3 is ignited by the spark plug, it expands rapidly three times in succession, achieving a sound amplification effect similar to that of a speaker, releasing a huge thrust to drive the piston to move, thereby increasing power;

[0021] 4. Because the combustion chamber 3 is trumpet-shaped, when the piston moves upward to squeeze the combustion chamber 3 gas, the gas is guided to flow along the top of the piston from the third expansion section 33 to the second expansion section 32 and the first expansion section 31, and then flows along the inner wall of the combustion chamber 3. The gas generates a vortex during the movement, making the gas in the combustion chamber 3 more uniform in a short time. After the spark plug is ignited, the gas burns more stably and the flame propagates more quickly, achieving the effect of high power and low fuel consumption.

[0022] 5. Since the cylinder body 11 is made of magnesium alloy, the inner wall of the cylinder hole 13 is inlaid with an aluminum alloy sleeve 14, and the round tube 21 is made of thin-walled carbon fiber, the overall weight is greatly reduced, making the structure light, thereby greatly reducing the burden on the operator and improving work efficiency.

[0023] The beneficial effects achieved by adopting the above embodiment are as follows: the paper is cut into sections after being notched to form a semi-finished product, and the two sides of the semi-finished product are clamped by the conveying clamp 6 and conveyed to the support platform 2, that is, the conveying clamp 6 clamps the part of the waste material on the semi-finished product, and then the pressing plate 46 presses the two sides of the semi-finished product located at the position of the blanking groove 43, and finally the finished product is ejected through the separation mold 42 and the lifting platform formed by multiple support rods 44 is driven to move downward (the output force of the separation cylinder 43 is greater than the output force of the lifting cylinder 45). The finished product is clamped between the support rod 44 and the separation mold 42 and transferred to the finished product conveying platform 5, and the waste material is then transferred to the waste support plate 3 through the conveying clamp 6, and then the workers collect and process the waste material, and the finished product is transferred to the finished product conveying platform by the support rod 44, so that the technical effect of automatically separating the waste material and the finished product and collecting the finished product in a centralized manner is achieved, thereby greatly reducing the labor cost and improving the production efficiency.

[0024] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-power, low-fuel-consumption, lightweight handheld lawn mower, comprising an engine and a tool, wherein the output shaft of the engine is drivingly connected to the tool, the engine comprising a cylinder body, a cylinder hole is arranged in the cylinder body, a piston is arranged in the cylinder hole, a combustion chamber is arranged at the top of the cylinder hole, and a spark plug is arranged at the top of the combustion chamber, characterized in that: The combustion chamber is trumpet-shaped, and is divided into a first expansion section, a second expansion section and a third expansion section from top to bottom. The inner wall inclination angle of the first expansion section is controlled between 58°-62°, the inner wall inclination angle of the second expansion section is controlled between 35°-40°, and the inner wall inclination angle of the third expansion section is controlled between 10°-13°. The cylinder body is made of magnesium alloy, and a sleeve made of aluminum alloy is inlaid on the inner wall of the cylinder hole. The machine includes a round tube connected to the engine, and the round tube is made of thin-walled carbon fiber. A transmission shaft connected to the engine output shaft is arranged in the round tube, and a blade is arranged at the end of the transmission shaft.

2. The high-power, low-fuel-consumption, lightweight handheld lawn mower according to claim 1, characterized in that: A U-shaped hand-held frame is also arranged on the circular tube, a throttle switch is arranged at one end of the hand-held frame, and a grip is arranged at the other end.

3. The high-power, low-fuel-consumption, lightweight handheld lawn mower according to claim 1, characterized in that: The engine also includes a transmission box body, the round tube is connected to the transmission box body, the engine output shaft is arranged in the transmission box body, and the transmission box body is a thin-wall hollow structure.

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