JP7283663B2 - walk-behind snow thrower - Google Patents

Description

The present invention relates to a walk-behind snow remover.

A walk-behind snow blower has a snow removal section installed in front of the traveling machine body for removing snow, an operation handle extending rearward from the traveling machine body, and a structure formed in the traveling machine body between the snow removing section and the operation handle. There are also those provided with a prime mover.

As this type of walk-behind snow remover, there is one disclosed in Patent Document 1, for example. The one disclosed in Patent Document 1 is provided with a snow removal section that rakes up snow with an auger, a control handle provided at the rear of the traveling body, and an engine positioned between the snow removal section and the control handle.

JP 2017-210842 A

In the walk-behind snow blower described above, the engine is generally provided in the drive unit, so if hot air whose temperature rises due to exhaust heat from the engine flows backward, it will adversely affect the members supported by the steering handle and the attached parts of the steering handle. Therefore, there is a demand for something that does not allow hot air to flow backward from the drive unit.

SUMMARY OF THE INVENTION The present invention provides a walk-behind snow blower that can effectively prevent hot air from flowing from the drive unit to the steering handle.

The walk-behind snow blower according to the present invention is
A snow removal section that is provided in front of the traveling body and performs snow removal work,
a steering handle extending rearward from the traveling body;
a driving unit formed on the traveling machine body between the snow removing unit and the steering handle;
The driving unit includes an engine, an engine cover that covers the engine, and an exhaust gas guide that is provided above the engine and guides exhaust gas from the engine to flow out laterally outward of the traveling machine body. ,
The engine cover includes an upper cover portion that covers the engine and the exhaust gas guide from above, a rear cover portion that covers the engine and the exhaust gas guide from the rear, a side cover portion that covers the engine from both lateral sides, and the a heat insulating material provided on the inner surface side of the upper cover part ,
An air guide is provided vertically along the engine and guides the air rising along the engine to flow into the exhaust gas guide.

According to this configuration, diffusion of heat radiation from the engine is prevented by the upper cover portion, the rear cover portion, and the side cover portion of the engine cover. In addition, the heat insulating material prevents the temperature of the upper cover portion from rising due to heat radiation from the engine, effectively preventing the heat radiation from diffusing due to the upper cover portion. Furthermore, since the exhaust gas from the engine is guided by the exhaust gas guide and flows out toward the lateral outer side of the traveling machine body, the exhaust gas is less likely to flow backward and the temperature rise of the engine cover due to the exhaust gas can be prevented. can effectively prevent hot air from flowing into the
According to this configuration, the air whose temperature has risen due to heat radiation from the engine flows into the inside of the exhaust gas guide by the air guide, is guided by the exhaust gas guide, and flows out toward the lateral outer side of the traveling machine body. can be made difficult to flow rearward, and it is possible to more effectively prevent hot air from flowing from the driving portion to the steering handle.

In the present invention,
It is preferable that a guide cover that covers the exhaust gas guide is provided inside the engine cover.

According to this configuration, the heat transfer from the exhaust gas guide to the engine cover is prevented by the guide cover, so that the temperature rise of the engine cover can be prevented, and the flow of hot air from the driving portion to the steering handle can be more effectively prevented.

In the present invention,
An upper portion of the upper cover portion, the upper portion of the side cover portion, and an upper portion of the rear cover portion are each made of resin, and a lower portion of the side cover portion and a lower portion of the rear cover portion are each made of metal. is preferable.

According to this configuration, even if mud or the like thrown up by the traveling device hits the lower portion of the rear cover portion and the lower portion of the side cover portion, the lower portion is made of metal and is less likely to be damaged or damaged. Since the upper part of the upper cover part, the upper part of the side cover part, and the upper part of the rear cover part are made of resin that does not easily become hot, it is possible to prevent hot air from flowing from the driving part to the steering handle while making it difficult to break or damage the engine cover. .

In the present invention,
A battery is preferably supported at the base of the steering handle behind the engine cover.

According to this configuration, since the weight of the battery is applied to the rear part of the traveling machine body, the battery can be used as a balance weight provided at the rear part of the traveling machine body while preventing the temperature of the battery from rising due to the air flowing from the driving part.

Fig. 2 is a left side view showing the entire walk-behind snow remover; Fig. 2 is a right side view showing the entire walk-behind snow remover; 1 is a plan view showing the entire walk-behind snow blower; FIG. Fig. 3 is a left side view showing the motor part in a longitudinally sectioned state of the engine cover; FIG. 3 is a perspective view showing an exhaust gas guide and a guide cover in a detached state, an engine cover in a disassembled state, and the like;

An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
1, 2 and 3, the direction of the arrow F shown in FIGS. The direction of arrow U shown in FIG. .

[Overall Configuration of Walk-behind Snow Plow]
As shown in FIGS. 1, 2 and 3, the walk-behind snow remover has a traveling body 2 equipped with a pair of left and right crawler-type traveling devices 1 . A snow removal section 3 for removing snow is provided in front of the traveling body 2 . In the snow removal unit 3, a pair of left and right snow scraping augers 5 are rotatably provided inside an auger housing 4 to scrape off snow from a work target location. Released towards the discharge point. A steering handle 9 extends rearward and upward from the rear portion of a body frame 8 of the traveling body 2 . The steering handle 9 is composed of a pair of left and right handle rods 9a. A driving unit 20 having an engine 21 that outputs power toward the traveling device 1 and the snow removing unit 3 is formed in the traveling body 2 between the snow removing unit 3 and the steering handle 9 . A portion from the rear part of the snow removing part 3 to the front part of the traveling machine body 2 is covered from the lateral sides by left and right side covers 10. - 特許庁Between the left and right side covers 10, a portion from the rear portion of the snow removal section 3 to the front portion of the traveling machine body 2 is covered from above with an upper cover 11. - 特許庁The shooter 7 is inserted through a through hole formed in the upper cover 11 .

The steering handle 9 is provided with a grip-lever type steering lever 12 for operating left and right steering clutches (not shown). A control panel 14 having a forward/reverse lever 13 for switching the traveling device 1 forward/backward is supported by the steering handle 9 . It is configured such that a worker can steer the traveling body 2 with the steering handle 9 while following the traveling body 2 behind the traveling body 2 and walking. A battery 15 is supported at the base of the steering handle 9 behind an engine cover 30 provided on the driving portion 20 . The battery 15 is covered and supported by a battery cover 16 .

[Construction of the driving part]
As shown in FIG. 4, the driving unit 20 includes an engine 21 supported by the body frame 8, an exhaust gas guide 22 provided above the engine 21, the engine 21 and the exhaust gas guide 22 are covered, and the engine 21 dissipates heat. Also provided are an engine cover 30 for preventing diffusion of heat radiation from the exhaust gas guide 22 and an air guide 23 provided in front of the engine 21 . The engine 21 is mounted in an inclined state in which the upper portion is located on the upper left side of the lower portion.

As shown in FIGS. 1, 2, 3, and 4, the engine cover 30 includes an upper cover portion 31 that covers the engine 21 and the exhaust gas guide 22 from above, and a rear cover portion 32 that covers the engine 21 and the exhaust gas guide 22 from behind. , a left lateral cover portion 33 that covers the engine 21 from the left lateral side, and a right lateral cover portion 33 that covers the engine 21 from the right lateral side. As shown in FIG. 4, a heat insulating material 34 is provided on the inner surface side of the upper cover portion 31 to prevent the temperature of the upper cover portion 31 from rising due to heat radiation from the engine. Glass wool is used as the heat insulating material 34 in the present embodiment, but the material is not limited to this. For example, rock wool, polystyrene foam, etc. can be used. As shown in FIGS. 3 and 5, an opening 36 is formed in the upper portion of the engine cover 30 to expose the upper portion of the fuel tank 35 for the engine located laterally of the exhaust gas guide 22 and provided with a lubricating port 35a. formed. A guide groove 38 is formed in a rim portion 37 of the engine cover 30 to allow fuel spilled from the upper portion of the fuel tank 35 to flow down to the rear outside of the engine cover 30 . As shown in FIG. 3, the guide groove 38 communicates with a recessed portion 35b formed in the upper portion of the fuel tank 35 so as to guide the spilled fuel downward.

As shown in FIGS. 1, 2 and 5, the left and right horizontal cover portions 33 are horizontal lower covers as lower portions of the horizontal cover portions 33 whose lower ends 33a are supported by cover support portions 39 provided on the body frame 8. 33D and a horizontal upper cover portion 33U as an upper portion of the horizontal cover portion 33 whose lower end portion 33c is detachably connected to the upper end portion 33b of the horizontal lower cover portion 33D by a connecting screw 40 (see FIGS. 1 and 2). and The rear cover portion 32 includes a lower rear cover portion 32D as a lower portion of the rear cover portion 32, the lower end portion 32a of which is supported by left and right cover support portions 39, and a lower end portion 32c connected to an upper end portion 32b of the lower cover portion 32D by a connecting screw. and a rear upper cover portion 32U as an upper portion of the rear cover portion 32 detachably connected by 40. As shown in FIG.

The upper cover portion 31, the left and right lateral upper cover portions 33U, and the rear upper cover portion 32U are made by molding a resin material and are difficult to reach high temperatures. As shown in FIG. 5, the upper cover portion 31, the left and right horizontal upper cover portions 33U, and the rear upper cover portion 32U are manufactured in a connected state to form a single structure.

The left and right lateral lower cover portions 33D and the rear lower cover portion 32D are made of plate-like members made of metal, and are resistant to deformation and damage even when mud or the like thrown up by the traveling device 1 collides with them. ing.

As shown in FIGS. 4 and 5, the exhaust gas guide 22 is shaped like a box having an opening 22a at the bottom facing an upward exhaust port 21a provided at the top of the engine 21. As shown in FIG. A side wall portion of the exhaust gas guide 22 is formed with an exhaust port 22 b that opens toward a notch portion 30 a formed in the left side cover portion 33 of the engine cover 30 . The exhaust gas guide 22 allows the exhaust gas discharged from the exhaust port 21a of the engine 21 to flow into the exhaust gas guide 22 through the opening 22a, discharge the exhaust gas that has flowed in from the exhaust port 22b, and guide the engine through the notch 30a. It is made to flow out of the cover 30 . Exhaust gas discharged from the engine 21 inside the engine cover 30 is guided by the exhaust gas guide 22 and flows out of the engine cover 30 toward the lateral outer side of the traveling body 2 .

The exhaust gas guide 22 is covered with a guide cover 41 inside the engine cover 30 as shown in FIG. The guide cover 41 prevents heat radiation from the exhaust gas guide 22 from being transferred to the engine cover 30 . As shown in FIG. 5, the guide cover 41 is configured to cover the entire portion of the exhaust gas guide 22 except for the side wall portion having the discharge port 22b and the opening 22a at the bottom of the exhaust gas guide 22. . As shown in FIG. 4, the guide cover 41 has a heat insulating material attached to the inner surface and a step heating material attached to the outer surface. Guide cover 41 is configured to be supported by engine cover 30 via a connecting member (not shown) that connects guide cover 41 and engine cover 30 . The exhaust gas guide 22 is supported by the engine cover 30 via a connecting member (not shown) connecting the exhaust gas guide 22 and the guide cover 41, the guide cover 41, and a connecting member between the guide cover 41 and the engine cover 30. is configured as follows.

As shown in FIG. 4 , the air guide 23 is provided on the front side of the engine 21 and below the exhaust gas guide 22 so as to extend along the side of the engine 21 . The air guide 23 is supported by a strut member 42 extending from the cover support portion 39 . Air rising along the engine 21 due to temperature rise due to heat radiation from the engine 21 is guided by the air guide 23 so as to flow into the exhaust gas guide 22 through the opening 22a. The air whose temperature has risen due to heat radiation from the engine 21 is guided by the exhaust gas guide 22 and discharged to the outside of the engine cover 30 together with the exhaust gas from the engine 21 . Also, the exhaust gas discharged from the exhaust port 21 a of the engine 21 is guided by the air guide 23 so as to flow into the exhaust gas guide 22 .

[Another embodiment]
(1) Although the upper portion of the engine cover 30 is made of resin and the lower portion is made of metal in the above-described embodiment, the configuration is not limited to this. The entire engine cover 30 may be made of resin or metal.

(2) Although the guide cover 41 is provided in the above-described embodiment, the guide cover 41 may not be provided.

(3) Although the air guide 23 is provided in the above embodiment, the air guide 23 may not be provided.

The present invention comprises a snow removing section provided in front of a traveling machine body, a steering handle extending rearward from the traveling machine body, and a driving section formed on the traveling machine body between the snow removing section and the steering handle. It can be applied to the provided walk-behind snow blower.

2 traveling machine body 3 snow removing section 9 control handle 15 battery 20 motor section 22 exhaust gas guide 23 air guide 30 engine cover 31 upper cover section 32 rear cover section 32D lower section of rear cover section 32U upper section of rear cover section 33 side cover section 33U side cover Upper part of part 33D Lower part of side cover part 34 Heat insulating material

Claims (4)

A snow removal section that is provided in front of the traveling body and performs snow removal work,
a steering handle extending rearward from the traveling body;
a driving unit formed on the traveling machine body between the snow removing unit and the steering handle;
The driving unit includes an engine, an engine cover that covers the engine, and an exhaust gas guide that is provided above the engine and guides exhaust gas from the engine to flow out laterally outward of the traveling machine body. ,
The engine cover includes an upper cover portion that covers the engine and the exhaust gas guide from above, a rear cover portion that covers the engine and the exhaust gas guide from the rear, a side cover portion that covers the engine from both lateral sides, and the a heat insulating material provided on the inner surface side of the upper cover part ,
A walk-behind snow blower provided with an air guide that is provided vertically along the engine and guides air rising along the engine to flow into the exhaust gas guide. The walk-behind snow blower according to claim 1, further comprising a guide cover that covers the exhaust gas guide inside the engine cover. An upper portion of the upper cover portion, the upper portion of the side cover portion, and an upper portion of the rear cover portion are each made of resin, and a lower portion of the side cover portion and a lower portion of the rear cover portion are each made of metal. The walk-behind snow blower according to claim 1 or 2 , wherein: The walk-behind snow blower according to any one of claims 1 to 3 , wherein a battery is supported at the base of the steering handle behind the engine cover.

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