JP2007177780A - Engine driven work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine driven work machine to simplify the drainage mechanism of rain water which invades from an air exhaust outlet and enables easy maintenance and inspection by downsizing a casing without complicating the structure. <P>SOLUTION: The engine driven work machine has an upper air exhaust discharge structure: in the structure, the inside of an air exhaust frame 130 having a ventilation path function to discharge air exhaust after cooling the casing inside by a cooling fan 82 to the outside of the casing and vertically divided into two by a horizontal floor 130b, and an air exhaust cover 131 having an opening is provided at the end of the air exhaust frame 130 above the floor 130b. In this case, the lower end of an opening 130a for maintenance is formed so as to touch to the floor 130b on a wall face of the air exhaust frame 130 which faces to the side wall face which the exhaust air is discharged after cooling a radiator 80 on the wall face of the floor 130b and a baffle plate 138 is arranged in the top part where it is inserted in the air exhaust processing frame of the cover 135 to block up the opening 130a for maintenance and a plurality of water drain holes 135f are formed in the lower end part of the cover 135. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a casing structure of an engine-driven working machine such as an engine-driven compressor, a generator, a welder, or a pump, and more particularly relates to simplification of a rainwater drainage mechanism by downsizing the casing.

  Simple soundproof and soundproof engine-driven work machines with an engine, work machine main body, engine cooling radiator, control equipment, etc. installed in the housing have openings for intake and exhaust ports for introducing outside air. It has means for discharging rainwater, dust, etc. entering the body surface from the opening.

  For example, the conventional engine-driven work machine 100 shown in FIG. 6 has an engine and work machine body (not shown) inside the casing, and has a cooling fan 82 for cooling, a radiator 80 as a heat exchanger, and the like. is doing. An air exhaust port 131a for discharging the cooling air after cooling the radiator 80 is formed in the upper part of the air exhaust frame 130 at the left end of the housing. A handle 130f used for fixing the machine or the like is fixed to the upper portion of the side wall surface 130e of the exhaust frame 130.

  The air exhaust frame 130 is configured by a box-like box body, and the inside is partitioned into a space in each of the upper and lower portions by a partition 140 at a substantially central portion in the vertical direction. In the upper space, an exhaust port for discharging exhaust air is opened at the upper end, and in the lower space, a fuel tank 70 is disposed between a floor surface (not shown) of the base frame 110 and the partition wall 140.

  The partition wall 140 is formed so as to incline downward toward the radiator 80 from the front side in order to efficiently discharge the cooling air and to drain the rainwater from the exhaust port 131a. A gutter 140a is formed along the shape of the gutter 140a, and a bottom surface of the gutter part 140a is formed with a discharge port (not shown) for discharging the collected rainwater to the outside of the casing.

  The fuel tank 70 disposed in the lower space has a rectangular shape that avoids interference with the flange 140a. Further, an opening 130a for maintenance and inspection is formed above the partition wall 140 on the side wall surface 130e of the exhaust frame 130, and a cover 150 having a reinforcing member 150a that closes from the outside of the housing is formed in the opening. Although it is disassembled in FIG. 6, it has a structure in which it is detachably mounted between the mounting hole 150b and the screw hole 130c with a bolt (not shown).

  FIG. 1 of Patent Document 1 is shown in FIG. In the following description of patent documents, the names are explained by the notation of the patent documents, and the codes are described by different codes in order to avoid confusion. Patent Document 1 discloses an invention in which blow-by gas is separated into a gas and a liquid, and the liquid is discharged out of the casing together with rainwater and dust.

  An engine 203, a generator 204, a cooling fan 205, a radiator 206, and the like are disposed in an engine room 211 of the soundproof bonnet 201, and a partition wall 210 that divides the soundproof bonnet 201 into the engine room 211 and the exhaust duct 208. Is formed. Further, the inside of the exhaust duct 208 is divided into upper and lower parts by a partition wall inclined from the left side to the right side in the approximate center, and the right side end part of the partition wall is recessed in a concave shape for collecting rainwater with the partition wall 210. A portion 212 is formed.

The blow-by gas of the engine 203 is separated into a gas and a liquid by a blow-by gas separation pipe 214, and the liquid is collected in the flange portion 212. In addition, rainwater that enters from the exhaust port 207 opened at the top of the exhaust duct 208 is also collected in the flange 212 and is more reliably soundproofed by the drain pipe 212a formed on the bottom surface of the flange 212 together with the liquid content of the blow-by gas. It is disclosed as an invention for discharging to the outside of the bonnet 201.
Japanese Patent Laid-Open No. 8-260935

  There is a demand for a machine with a smaller engine-driven work machine, longer operating time, and reduced cost. In the conventional example shown in FIG. 6, rainwater enters from the air exhaust port 131 opened on the upper surface of the air exhaust treatment frame 130, so that the partition wall 140 is inclined from the front side of the figure to the radiator 80 side and is concave at the end. No. 140a is formed to take measures to discharge rainwater.

  However, due to the formation of the flange 140a, the installable volume of the fuel tank for the engine-driven work machine and other related devices disposed below the partition wall 140 is reduced. When trying to increase the capacity of the fuel tank, it is possible to increase the capacity along the inclination of the partition wall 140 while avoiding the flange 140a. However, this may cause lack of versatility and increase the cost. It is inconvenient.

  In addition, there is a case where dust including dead leaves other than rain water accumulates on the tub 140a from the exhaust port 131a and cannot be discharged out of the casing. In such a case, it is removed by cleaning. However, the ridge 140a is formed in the interior of the housing, and since it has a concave shape, it cannot be visually observed and may be difficult to clean.

  Also, the larger the cover 150 is, the easier it is to perform maintenance and inspection. However, when the size of the cover 150 increases, it is necessary to increase the strength of the cover 150 in order to maintain rigidity, which increases the weight and makes removal difficult. There is also. If the opening and the cover 150 are disposed at a position facing the radiator 80 in consideration of maintenance and inspection, the air pressure of the cooling air may be received to further increase the strength.

  In the invention disclosed in FIG. 7 as well, the structure of the partition wall and the ridge 212 that partitions the inside of the exhaust duct 208 into an upper space and a lower space is the same as the conventional example of FIG. It is the same. In addition, when the apparatus room 211 has a structure in which related equipment or the like disposed in the lower space of the partition wall is taken in and out, the flange portion 212 may become an obstacle and cause trouble.

Means to solve the problem

  In order to solve the above-described problems, according to the present invention, at least an engine, a work machine body driven by the engine, a heat exchanger for cooling the engine, a cooling fan, and the like are arranged in the casing. The exhaust air after cooling the heat exchanger or the like by the cooling fan is discharged into the exhaust air frame from the communication port formed on the side wall surface of the box-shaped exhaust air frame disposed at the end of the housing. In the exhaust frame, a floor plate is formed that horizontally partitions the entire inner surface formed below the communication port, and exhaust air is discharged out of the housing from the exhaust port formed in the ceiling surface above the floor plate. An engine-driven work machine having a structure, wherein a maintenance opening is formed on a side wall surface facing the communication port of the exhaust frame, and a lower side of the maintenance opening is formed so as to be in contact with the upper surface of the floor plate. .

  In order to solve the above-described problems, in the present invention, as described in claim 2, the engine-driven work machine according to claim 1, further comprising a cover for closing the maintenance opening from the outside. At least the lower end of the cover has a bent piece inserted inward along the upper surface of the duct floor plate with which the lower end of the maintenance opening abuts, and is bent at a substantially right angle connected to the lower end of the cover and the lower end of the cover. A drain outlet that communicates at least one or more inside and outside is formed at the corner of the piece.

  In order to solve the above-mentioned problems, according to the present invention, as set forth in claim 3, the engine-driven work machine according to claim 2, wherein the cover for closing the maintenance opening on the side wall surface of the exhaust air treatment frame is covered. The maintenance opening, the communication port, the engine cooling heat exchanger, the cooling fan, and the engine are arranged linearly in this order.

  In order to solve the above-mentioned problems, in the present invention, as described in claim 4, the engine-driven working machine according to claim 2, wherein the working machine is horizontally outside the outer surface of the suspended cover. An extending U-shaped handle is fixed to the cover.

  In order to solve the above-described problems, according to the present invention, a cover for an engine-driven work machine according to claims 2 to 4, wherein the cover is horizontal from the lower end of the cover. An inclined air guide plate that guides the exhausted air after cooling the radiator upward is detachably disposed between the end of the bent piece extending inward and another fixing member formed on the cover.

The invention's effect

  The present invention has the following effects by being configured as described above.

  Since the floor plate, which is the partition wall inside the wind exhaust frame, is made almost horizontal and the rainwater collecting trap is removed, the space under the floor plate can be increased, and the capacity of the fuel tank that can be stored can be increased. Therefore, it is possible to provide an engine-driven work machine that can be operated for a long time without enlarging the casing.

  Maintenance opening is provided on the side wall surface of the exhaust frame that faces the heat radiating surface of the radiator, which is a heat exchanger installed in consideration of maintenance and inspection, so that the radiator can be easily cleaned by removing the cover. Can be done. Further, since the lower end surface of the opening is in contact with the upper surface of the floor plate, which is the partition wall surface of the exhaust frame, it leads to the outside of the housing.

  Even if dust such as dead leaves enters the interior from the exhaust vents provided on the ceiling surface of the exhaust frame, the floor plate surface is flat and the lower end of the maintenance opening is in contact with the upper surface of the floor plate. Easy to clean.

  After installing the cover that closes the maintenance opening, the drainage hole is arranged at the corner of the bent piece that is connected to the lower end surface of the cover and enters the inner surface of the maintenance opening. Even if rainwater enters from the air outlet, it can be drained easily. When the engine is operating, the exhaust capacity is further increased by the wind pressure of the cooling fan.

  A reinforcing bent piece bent inward is formed at least at the lower end of the cover so that it has rigidity, and even if the exhaust air after cooling the radiator touches the cover, it does not vibrate due to insufficient strength. Therefore, it is possible to reduce the weight.

  In addition, the bottom end of the cover is inclined so as to guide the exhausted air after cooling the radiator upward between the tip of the bent piece formed horizontally so as to enter the inner surface of the maintenance opening and the other fixed part formed on the cover. Since the wind guide plate is detachably disposed, the exhaust air after cooling the radiator is discharged outside the casing without causing turbulent flow, so that efficient cooling is possible.

  A part of the engine noise that passes through the radiator and is linearly radiated in the direction of the cover mounting surface of the casing is released upward by the wind guide plate while being attenuated inside the casing. Further, the component passing through the air guide plate and the cover is reduced by the transmission loss of the double wall, and the noise in the work area can be reduced.

BEST MODE FOR CARRYING OUT THE INVENTION

  Examples of the present invention will be described below with reference to FIGS.

  FIG. 1 is a perspective view of an engine-driven work machine 100 that is an engine-driven generator according to an embodiment of the present invention, and shows a view in which a cover 135 is removed for explanation. The engine-driven work machine 100 is disposed on a base 110, which is a basic frame body, in which an engine (not shown) and a work machine body (not shown) are connected to each other. It is disposed at a predetermined position in the body.

  The casing of the engine-driven work machine 100 includes a rear frame 120 from the right rear side in the drawing, a wind exhaust frame 130 on the left front side, a roof member 115, a plurality of doors 117 having pivots, and the like.

  The wind exhaust frame 130 is provided with a wind exhaust cover 131 having an opening 131a for exhausting the exhaust air at the ceiling, and has a duct shape with four sides surrounded by a wall. The duct is divided into two in the vertical direction by a floor plate 130b which becomes a horizontal partition wall. The upper side of the floor plate 130b is a space for exhausting exhaust air, and the lower side is a space for disposing the fuel tank 70.

  Since the space surrounded by the base 110, which is a base frame, and the floor plate 130b does not have the concave ridge shown in the conventional example, the capacity of the substantially rectangular parallelepiped fuel tank 70 can be increased. Moreover, since the cross section of the fuel tank is a substantially rectangular parallelepiped, the fuel tank has versatility and can suppress an increase in price in terms of cost.

  A maintenance opening 130 a that communicates the inside of the housing and the outside of the housing is formed on the side wall surface of the air exhaust frame 130 that faces the radiator 80. A plurality of screw holes 130c are provided on both sides of the maintenance opening 130a, and a cover 135 for closing the opening 130a is screwed. A reinforcing member 130d bent inward for reinforcement is formed on the outer periphery of the opening 130a.

  The cover 135 has a mounting surface 135a to the exhaust frame 130, and an upper surface member 135d and a lower surface member 135b which are connected to the upper and lower ends of the mounting surface 135a and bent inward. A horizontal handle 136 is disposed at a substantially central portion in the vertical direction of the mounting surface 135a, and is used as a gripping rod for fixing at the time of transport and for detaching the cover 135. Further, drainage drain holes 135f are formed in two places in the bent portion of the lower surface member 135b which is connected to the lower end of the mounting surface 135a and bent inward.

  Since the lower surface member 135b of the cover 135 is disposed along the floor plate 130b of the exhaust frame 130, the water that has entered the floor plate 130b of the exhaust frame 130 is inserted into the casing through the drain hole 135f of the cover 135. It is discharged outside. The cover 135 has a structure in which an attachment hole 135g and a screw hole 130c of the exhaust frame 130 are attached to each other, and are attached with a bolt (not shown).

    FIG. 2 shows a state in which the cover 135 removed in FIG. 1 is screwed into a predetermined position. Rainwater that has entered through the opening 131 a of the wind exhaust cover 131 disposed at the upper part of the wind exhaust frame 130 is collected on the floor plate 130 b that partitions the exhaust wind frame 130 substantially horizontally, and is formed on the inside and outside of the cover 135. Is discharged out of the housing through a drain hole 135f communicating with the outside.

    FIG. 3 is a cross-sectional view of the inside of the wind exhaust frame 130 of the engine-driven working machine 100 shown in FIGS. 1 and 2, and will be described in detail below. An engine 50 and a work machine main body 55 that is a generator driven by the engine, a cooling fan 82, a radiator 80, and the like are disposed inside the casing of the engine-driven work machine 100.

  At the left end of the radiator 80 in the figure, a wind exhaust frame 130 which is a part of the casing is disposed. A communication port is formed in the contact surface of the exhaust frame 130 with the radiator 80, and a cover 135 is closed on the side wall surface of the exhaust frame 130 facing the communication port so as to block the maintenance opening 130a. It is inserted from the outside and is screwed to the side wall surface of the housing with a bolt (not shown).

  The upper part of the cover 135 in which the maintenance opening 130a of the exhaust frame 130 is closed and the upper and lower ends are loosely inserted into the maintenance opening 130a is connected to the upper end member 135d and the top end of the upper face member 135d at a right angle. The lower portion of the cover 135 is formed with a lower attachment portion 135c that is continuous with the tip of the lower surface member 135b and is bent upward at a right angle.

  A wind guide plate 138 is screwed to the upper mounting portion 135e and the lower mounting portion 135c so as to be detachable with a bolt (not shown). The air guide plate 138 efficiently changes the direction of the exhaust air after cooling the engine, radiator, etc. disposed in the housing from the horizontal to the vertical direction, and the horizontal exhaust air becomes the upward exhaust air Q2. The air is exhausted to the outside of the housing from the opening 131a of the air exhaust cover 131 disposed on the air exhaust frame 130.

  Further, the noise of the engine 50 and the noise of the cooling fan 82 pass without being attenuated due to the structure of the radiator 80 and propagate into the exhaust frame 130, and the noise absorbs the noise in the exhaust frame 130 and part of the noise energy. The air guide plate 138 is bent upward and discharged upward from the ceiling opening 131a. For this reason, it is possible to reduce the noise around the housing, which is the work area of the worker.

  Further, since the air volume of the cooling fan 82 increases as the engine-driven work machine 100 increases in size, applying the wind pressure perpendicularly to the cover 135 where the air guide plate 138 is not disposed causes vibration due to insufficient strength of the cover 135. It may occur and is not preferable.

  FIG. 4 shows another embodiment in which the handle 136 is deleted from the cover 135 described with reference to FIGS. 1 to 3, and the convenience of the handle is lacking, but the other effects are the same.

  FIG. 5 shows another embodiment in which the cover 135 described with reference to FIGS. 1 to 3 is further simplified, and includes a lower surface member 135b that is continuous with the lower end of the mounting surface 135a of the cover 135 and bent inward. . Water drainage holes 135f are formed in two places in the bent portion of the attachment surface 135a and the lower surface member 135b of the cover 135.

  Since the drain hole 135f is provided, rainwater that has entered through the opening 131a of the wind exhaust cover 131 disposed on the upper portion of the wind exhaust frame 130 can be easily discharged to the outside of the housing. In addition, since the lower surface member 135b is provided, the strength of the mounting surface 135a can be increased, and even when the exhaust air is in direct contact, it can be used as long as it is not a large engine-driven work machine, and it is small and light. There is an effect.

  Although the shape of the drain hole 135f is disclosed as an ellipse, it is needless to say that a round hole, a square hole, and other shapes have the same effect. Further, the floor plate 130b that divides the inside of the exhaust frame 130 substantially horizontally can be further provided by providing a gentle inclination from the radiator 80 side to the maintenance opening 130a side within a range that does not hinder the capacity and arrangement of the fuel tank 70. Needless to say, it has a drainage effect.

FIG. 1 is an exploded view of an engine-driven work machine showing an embodiment of the present invention. FIG. 2 is an assembly drawing of the engine-driven work machine shown in FIG. 3 is a cross-sectional view of the engine-driven work machine shown in FIG. FIG. 4 is an embodiment showing a modification of the cover shown in FIG. FIG. 5 shows an example of another cover modification. FIG. 6 shows an engine-driven working machine showing a conventional example. FIG. 7 is a cross-sectional view of an engine-driven work machine showing another conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 50 Engine 55 Work machine main body 70 Fuel tank 80 Radiator 82 Cooling fan 100 Engine drive work machine 110 Base 130 Exhaust frame 130a Maintenance opening part 130b Floor board 130d Reinforcement member 131 Exhaust cover 131a Opening part 135,150 Cover 135a Mounting surface 135f Drain hole 137, 150a Reinforcing member 138 Air guide plate 140 Bulkhead 140a 樋

Claims (5)

  At least an engine, a work machine body driven by the engine, a heat exchanger for cooling the engine, a cooling fan, and the like are arranged in the casing, and exhausted air after cooling of the heat exchanger, etc. by the cooling fan is disposed at the end of the casing. The air is discharged into the exhaust frame from the communication port formed on the side wall surface of the box-shaped exhaust frame, and the entire inner surface formed below the communication port is substantially horizontal inside the exhaust frame. An engine-driven work machine having a structure in which a floor plate for partitioning is formed and exhausting exhaust air from a wind exhaust port formed on a ceiling surface above the floor plate to the outside of the housing, facing the communication port of the exhaust frame. An engine-driven work machine, wherein a maintenance opening is formed on a side wall surface, and a lower side of the maintenance opening is in contact with the upper surface of the floor plate.   2. The engine-driven work machine according to claim 1, wherein a cover that closes the maintenance opening from the outside is disposed, and at least a lower end of the cover is along an upper surface of the duct floor plate with which the lower end of the maintenance opening abuts. It has a bent piece inserted inside, and a drainage port is formed which communicates at least one or more inside and outside at a corner of the lower end of the cover and a bent piece connected to the lower end of the cover and bent at a substantially right angle. Engine driven work machine.   3. The engine-driven work machine according to claim 2, wherein a cover that covers the maintenance opening on the side wall surface of the exhaust air processing frame, a maintenance opening, a communication port, an engine cooling heat exchanger, a cooling fan, and an engine are linearly arranged in this order. Engine-driven work machine characterized by being arranged in a shape.   3. The engine-driven work machine according to claim 2, wherein a U-shaped handle extending horizontally outward from the outer surface of the suspended cover is fixed to the cover. .   5. A cover for an engine-driven work machine according to claim 2, wherein the bent piece tip portion that extends horizontally and extends inward from the lower end of the cover, and another fixing member formed on the cover. An engine-driven work machine, characterized in that an inclined air guide plate that guides the exhausted air after cooling the radiator upward is detachable.

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