JP7183114B2 - work machine - Google Patents

Description

The present invention relates to a working machine equipped with an engine.

Conventionally, in a combine harvester, which is an example of the above working machine, a radiator for cooling the engine is supported by a support frame formed in a four-sided frame shape so as to surround the outer circumference of the radiator. The support frame is fixed to the body frame by bolt connection or the like. A dustproof case covering the outside of the body of the radiator is supported so as to be swingable integrally with the engine bonnet, and when they are swung outward, the radiator is opened to face outward. There has been one configured as described above (see, for example, Patent Document 1).

JP 2017-200469 A

In this type of work vehicle, the radiator may be removed in order to remove dust adhering to the inside of the radiator body. In the above-described conventional configuration, when the radiator is to be removed, the dustproof case is opened, and then the connection between the support frame surrounding the radiator and the body frame is released. It was necessary to remove the support frame and the radiator integrally, which are members, to the outside, which was a troublesome task.

Therefore, it has been demanded to improve the workability when performing the maintenance work of the radiator.

A working machine according to the present invention is characterized by: an engine bonnet that covers an engine to form an engine room, supports a driver's seat from below, and opens laterally outward; a radiator for cooling the engine provided laterally outside of the engine; a dustproof case provided laterally outside of the radiator for blocking the lateral outer side of the radiator while allowing ventilation and preventing the passage of dust; a cooling fan provided laterally inside the radiator for drawing outside air through the dust-proof case to cool the radiator; A fan shroud is provided so as to extend over a radiator and guide outside air from the radiator to the cooling fan; and a fan shroud is provided so as to extend over an opening formed laterally inside the dustproof case and the radiator and supports the radiator. The radiator is supported by the support frame so as to be slidable rearward along the cooling surface, and an opening is provided in the rear portion of the engine room through which the radiator can be pulled out and removed rearward. The fan shroud is configured to be dividable into a plurality of divided bodies in the circumferential direction, and some of the plurality of divided bodies are supported by the radiator, and the plurality of divided bodies are supported by the radiator. Another division of the body separates the radiator .

According to the present invention, when the radiator is to be removed, the radiator is slid rearward with respect to the support frame through the opening formed in the rear portion of the engine room, and is removed from the engine room outside the engine room through the opening. can be pulled out.

Since the supporting frame does not need to be removed, and only the radiator can be removed, troublesome work such as removing both the supporting frame and the radiator toward the outside is unnecessary.
As a result, it has become possible to improve workability when performing maintenance work for the radiator.

Further, when the fan shroud is removed along with the work of removing the radiator, it can be removed for each split body. As a result, compared to the case where the entire fan shroud is integrally formed, the fan shroud can be removed more easily, and the workability of the maintenance work is further improved.

Furthermore, when the fan shroud is attached to and detached from the radiator, it can be handled by attaching and detaching only a part of the divided bodies to and from the radiator, and the work of attaching and detaching the other divided bodies to and from the radiator is unnecessary, and the work can be performed efficiently.

In the present invention, it is preferable that the partial divided body is detachably supported by the radiator and can be pulled out and removed rearward along the direction in which the radiator is pulled out and removed.

According to this configuration, when the fan shroud is removed, if the fan shroud is divided into a part of the divided bodies and the other divided bodies, the part of the divided bodies is supported by the radiator and then removed integrally. It can be removed and works efficiently.

In the present invention, of the fan shroud, the upper portion covering the upper side of the air intake space, the lower portion covering the lower side of the air intake space, and the front side of the air intake space in the removal direction are It is preferable that the covering front part is removable.

According to this configuration, the upper portion, the lower portion, and the front portion do not interfere with the cooling fan even if they are removed backward along the removal direction. Therefore, the fan shroud can be removed without interfering with the cooling fan.

In the present invention, it is preferable that the upper portion, the lower portion, and the front portion are integrally formed.

According to this configuration, since the upper portion, the lower portion, and the front portion can be removed integrally, the work can be performed more efficiently than when they are removed separately.

In the present invention, the vertical wall portion of the fan shroud covering the side surface of the air intake space on the side of the cooling fan may be a front vertical wall portion located on the front side in the removal direction and a vertical wall portion positioned on the front side in the removal direction. The front vertical wall portion can be pulled out rearward and removed integrally with the upper portion, the lower portion, and the front portion. It is preferable that the back side vertical wall portion is provided integrally with a back side portion that covers the back side of the intake space in the removal direction.

According to this configuration, when the fan shroud is to be removed, the upper portion, the lower portion, the front portion, and The vertical wall portion on the front side can be pulled out and removed integrally, allowing efficient work.

In the present invention, an air intake opening through which air is drawn by the cooling fan is formed in the vertical wall portion, and a peripheral wall portion protruding toward the cooling fan is formed in the outer peripheral portion of the air intake opening. A fan is provided in a state of being inserted into the peripheral wall portion, and a boundary between the front side vertical wall portion and the back side vertical wall portion of the peripheral wall portion is detachably connected, and the upper portion and the lower portion are connected to each other. Preferably, the side portions and the front portion are supported on the radiator.

According to this configuration, since the outer peripheral portion of the air intake opening is covered with the peripheral wall portion, air is efficiently drawn in by the cooling fan. By using the peripheral wall part projecting to the cooling fan side and connecting at the boundary of the peripheral wall part, compared to the structure where the end faces of the wall surfaces are butted against each other, the connection and disconnection operations can be easily performed. be able to. Further, since the upper part, the lower part, and the front part of the fan shroud are supported by the radiator, they can be removed together with the radiator by releasing the connection at the boundary of the peripheral wall.

In the present invention, the support frame is formed in the shape of a four-sided frame along the outer periphery of the radiator, has an opening extending vertically through the lower frame-shaped portion, and includes a lid capable of opening and closing the opening. It is preferred that

According to this configuration, dust adhering to the cooling air inlet portion of the radiator may drop and accumulate on the lower frame-shaped portion after the cooling operation of the cooling fan is finished. By opening the lid, accumulated dust can be discharged downward through the opening. By covering the opening with the cover while the cooling fan is in operation, the cooling air can be appropriately passed through the dustproof case.

It is the whole combine side view. It is the whole combine top view. It is a rear view which shows the internal structure of an engine room. It is a front view which shows the internal structure of an engine room. It is a top view which shows the internal structure of an engine room. It is a rear sectional view showing a support structure for a radiator. FIG. 4 is an exploded perspective view showing a support structure for a radiator; It is a sectional view showing an attached state of a lid. FIG. 4 is a perspective view showing the separation structure of the fan shroud; FIG. 4 shows a support arrangement for a supply pipe;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a case where an embodiment of a work machine according to the present invention is applied to a common combine harvester as an example of a work machine will be described based on the drawings.

In this embodiment, the direction indicated by symbol (F) in FIGS. 1 and 2 is the front side of the fuselage, and the direction indicated by symbol (B) in FIGS. 1 and 2 is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the fuselage, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the fuselage.

〔overall structure〕
FIG. 1 shows a conventional combine. A traveling machine body of this combine is provided with a machine body frame 1 and a crawler traveling device 2. - 特許庁A harvesting section 3 for harvesting planted grain culms in a field is provided in front of the traveling machine body. The harvesting unit 3 includes a raking reel 4 for raking the planted grain culms, a cutting blade 5 for cutting the planted grain culms, and an auger for laterally feeding the harvested grain culms in the cutting width direction, gathering them together, and sending them backward. 6 and are provided.

An operating section 7 is provided behind the harvesting section 3 . The operating part 7 is covered with a cabin 8 . A grain tank 9 for storing grains obtained by threshing is provided behind the driving unit 7 . A threshing device 10 for threshing all the culms of harvested grain culms is provided side by side with the grain tank 9 . The grain tank 9 is configured to be rotatable around an axis Y1 extending vertically on the rear side between an open position projecting to the right and a closed position positioned adjacent to the rear of the driving unit 7. . A feeder 11 is provided across the harvesting unit 3 and the threshing device 10 to convey all the culms of harvested grain culms toward the threshing device 10 . The operation section 7 includes a driver's seat 12 and an operation panel 13 having various operation tools. A driving unit 15 is provided below the driving unit 7 .

[Motor part]
As shown in FIGS. 3 to 6, the driving unit 15 includes an engine 16, a radiator 17 for cooling the engine, a cooling fan 18 for drawing outside air to cool the radiator 17, and a fan for guiding outside air from the radiator 17 to the cooling fan 18. A shroud 19 and the like are provided.

As shown in FIGS. 2 and 4, an engine room bonnet 21 that covers the upper side of the engine 16 and forms an engine room 20 is provided. The engine room bonnet 21 supports the driver's seat 12 from below and opens laterally outward. The radiator 17 is provided laterally outside the engine 16 in the engine room 20 . The cooling fan 18 is provided laterally inside the radiator 17 in the engine room 20 .

The lateral outer side of the engine room 20 is covered with a dustproof case 22 located on the outer side of the radiator 17 . A dust-proof net 23 is provided on the lateral outer surface of the dust-proof case 22 to allow ventilation and block the passage of dust.

The dustproof case 22 is supported by a support frame 25 via a hinge 24 so as to be swingable around a vertical axis Y on the rear side. The support frame 25 is formed in a frame shape so as to substantially follow the outer periphery of the dustproof case 22 and is fixed to the radiator frame 26 . The dust-proof case 22 swings about the vertical axis Y, thereby switching between a closed posture covering the engine room 20 outside the fuselage and an open posture opening the engine room 20 outside the fuselage (see the phantom lines in FIG. 2). can swing across.

The cooling fan 18 cools the radiator 17 by drawing outside air through the dustproof case 22 in the closed posture. A fan shroud 19 is provided between the radiator 17 and the cooling fan 18 to guide the cooling air from the cooling fan 18 so as to efficiently pass through the radiator 17 . The fan shroud 19 is provided so as to cover the cooling fan 18 and the radiator 17 while surrounding the outer periphery of the intake space between the cooling fan 18 and the radiator 17 .

Although not shown, the transmission mechanism for transmitting the power of the engine 16 to the cooling fan 18 is provided with a rotating direction switching mechanism capable of switching the rotating direction of the cooling fan 18 between normal and reverse.
In the forward rotation state, the cooling fan 18 draws outside air through the dustproof case 22 to cool the radiator 17 . In the reversed state, the cooling fan 18 blows air laterally outward to blow off dust attached to the dustproof net 23 of the dustproof case 22 . If the reverse rotation of the cooling fan 18 is repeated, dust may adhere and accumulate inside the body of the radiator 17 .

The radiator 17 has a rectangular cooling surface 17A when viewed from the side, and external air drawn by the cooling fan 18 through the dustproof case 22 passes through the cooling surface 17A to exert a cooling effect. An intercooler 29 is provided in the vicinity of the cooling surface 17A of the radiator 17 to cool the combustion air for the engine 16 using cooling air.

As shown in FIGS. 3 and 4, the exhaust port 31 of the air cleaner 30 provided behind the driver's seat 12 and the suction port of the compression portion 32a of the supercharger 32 provided above the engine 16 are supercharger suction. It is connected via pipe 33 . As shown in FIGS. 4 and 5, the discharge port of the compression section 32a of the supercharger 32 and the introduction port 29a of the intercooler 29 are connected via a supply pipe 34. As shown in FIGS. A delivery port 29 b of the intercooler 29 and an intake portion of the engine 16 are connected via an engine suction pipe 35 . A suction portion of a turbine portion 32b of the supercharger 32 is connected to an exhaust manifold 37 of the engine 16, and an exhaust pipe 38 is connected to an exhaust portion of the turbine portion 32b of the supercharger 32. As shown in FIG.

Above the engine 16, an exhaust gas purifying device 39 is provided for purifying the exhaust gas so as to reduce diesel particulates contained in the exhaust gas of the engine 16 by means of a collection filter (not shown). The front side of the exhaust gas purifier 39 is supported by a connection flange 41 provided on the exhaust pipe 38 via a support bracket 40 which is L-shaped in a side view.

A support bracket 40 is used to hold the position of the connection of the supply pipe 34 to the supercharger 32 . As shown in FIG. 10, a mounting plate 42 extending in the front-rear direction is integrally provided at the right end of the support bracket 40 . Both sides of a holding member 43 that sandwiches and holds the supply pipe 34 are bolted to the mounting plate 42 . The holding member 43 grips the supply pipe 34 and holds the supply pipe 34 by a frictional force so that the supply pipe 34 does not come off.

A support structure for the radiator 17 will be described.
As shown in FIGS. 3-7, the radiator 17 is supported by a radiator frame 26 as a support frame. The radiator frame 26 covers the air intake space between the radiator 17 and the dustproof case 22, and is formed in a four-sided frame shape along the outer periphery of the radiator 17 so that the outside air passing through the dustproof case 22 is guided to the cooling surface 17A. It is That is, as shown in FIG. 7, the radiator frame 26 has a lower frame-shaped portion 45, front and rear frame-shaped portions 46 and 47, and an upper frame-shaped portion 48. It is provided in a rectangular shape when viewed from the side. The radiator frame 26 is supported by the body frame 1 at its bottom.

The radiator frame 26 is provided with a mounting support portion 49 that protrudes laterally inward from the frame portion 45 at the lower portion of the radiator frame 26 . The mounting support portion 49 is formed of a plate-like body that is long in the front-rear direction and narrow in the left-right direction and has a horizontal posture. A receiving portion 50 is provided at the front end portion of the mounting support portion 49 to prevent the placed radiator 17 from slipping forward. A rear end portion of the mounting support portion 49 is open without a member for receiving and blocking. Therefore, the radiator 17 can be removed rearward. A reinforcing rib 51 is provided on the lower side of the rear end portion of the mounting support portion 49 .

As shown in FIGS. 6 and 7, when the radiator 17 is in the cooling position, two locking pins 52 protruding downward from the lower portion of the radiator 17 at two front and rear locations are attached to the mounting support portion 49. It is placed and supported in a state in which it enters the formed engagement hole 53 and is prevented from being displaced. The upper portion of the radiator 17 is connected to the upper frame portion 46 of the radiator frame 26 via connecting brackets 54 at two front and rear locations.

As shown in FIG. 3, a large opening 55 is formed in the rear portion of the engine room 20 so that the radiator 17 can be pulled out rearward. When removing the radiator 17 for maintenance work, as shown by the phantom lines in FIG. The upper surface of 49 can be slid rearward along the cooling surface 17A. At this time, it is necessary to open the grain tank 9 to the open position, remove the cooling water circulation pipe 56, and disconnect the connection bracket 54 in advance. In addition, the lock pin 52 and the engagement hole 53 are disengaged from each other and moved while being slid.

As shown in FIGS. 6 and 8, the radiator frame 26 has a lower frame-shaped portion 45 formed with a cleaning port 57 as an opening penetrating vertically, and a cover 58 capable of opening and closing the cleaning port 57 . . A frame-shaped portion 45 at the bottom of the radiator frame 26 has a vertical surface portion 45a for fixing the support frame 25 of the dustproof case 22 on the outer side in the left-right direction, and a mounting support portion 49 is fixed on the inner side in the left-right direction. It has a vertical surface portion 45b for squeezing, and is formed to have a U-shaped cross section when viewed in the front-rear direction. Therefore, if dust accumulates inside the lower frame-shaped portion 45, it is difficult to clean. Therefore, dust can be removed through the cleaning port 57 .

As shown in FIG. 8, the cover 58 has a bifurcated insertion portion 59 provided at its rear end which is inserted into and engaged with the inner edge of the rear end of the cleaning port 57, and which is aligned with the central portion of the front and back of the cover 58. As shown in FIG. The front end portion is bolted to the peripheral portion of the cleaning port 57 of the lower frame portion 45 . By releasing the bolt connection, the lid 58 can be easily removed.

Next, the fan shroud 19 will be explained.
The fan shroud 19 is provided so as to cover the cooling fan 18 and the radiator 17 while surrounding the outer periphery of the intake space between the cooling fan 18 and the radiator 17 . As shown in FIGS. 7 and 9, the fan shroud 19 includes an upper portion 19a that covers the upper side of the air intake space, a lower portion 19b that covers the lower side of the air intake space, and a rear portion 19c that covers the rear side of the air intake space. , a front portion 19d covering the front side of the air intake space, and a vertical wall portion 19e covering the left side (cooling fan 18 side) of the air intake space. The rear side corresponds to the front side in the removal direction of the radiator 17, and the rear side portion 19c corresponds to the front side portion that covers the front side in the removal direction of the air intake space.

The upper portion 19a is provided in a horizontal position. The lower portion 19b is provided in an inclined posture so that it is positioned upward toward the left side. The rear portion 19c is provided in a tilted posture positioned forward toward the left side. The front side portion 19d is provided in an inclined posture positioned rearward toward the left side. The right end of the fan shroud 19 is formed in a rectangular shape surrounding the outer periphery of the radiator 17, and along the longitudinal direction and the vertical direction, the intake space surrounded by the fan shroud 19 faces left (toward the cooling fan 18). The width gradually narrows.
With this configuration, the cooling air passing through the air intake space is favorably guided to the cooling fan 18 side.

An intake opening 60 through which the cooling fan 18 takes in air is formed in the vertical wall portion 19e. The air intake opening 60 is circular and formed to have a large diameter that is substantially equal to the full vertical width of the vertical wall portion 19e. A peripheral wall portion 61 that protrudes toward the cooling fan 18 is formed on the inner edge portion of the intake opening 60 . A cooling fan 18 is provided so as to enter the peripheral wall portion 61 .

More specifically, the vertical wall portion 19e of the fan shroud 19 is divided into a left vertical wall portion 19e1 located on the left side and a right vertical wall portion 19e2 located on the right side at a substantially laterally central position. The left vertical wall portion 19e1 corresponds to a front vertical wall portion located on the front side in the removal direction. The right side vertical wall portion 19e2 corresponds to a depth side vertical wall portion located on the depth side in the removal direction.

An upper portion 19a, a lower portion 19b, and a rear portion 19c of the fan shroud 19 are integrally formed. The left vertical wall portion 19e1 is screwed and fixed to the integrally formed upper portion 19a, lower portion 19b, and rear portion 19c.
The right vertical wall portion 19e2 and the front portion 19d are integrally formed.

Accordingly, the fan shroud 19 has a right vertical wall integrally formed with an upper portion 19a, a lower portion 19b, a rear portion 19c, and a fixed left vertical wall portion 19e1 forming a partial divided body B1. Another divided body B2 is composed of the portion 19e2 and the front side portion 19d, and is configured to be divisible into two divided bodies B1 and B2 in the circumferential direction.

Flange connecting portions 63 that can be connected with bolts are formed at two locations above and below a boundary 62 between the left vertical wall portion 19e1 and the right vertical wall portion 19e2 of the peripheral wall portion 61 . The flange connecting portion 63 is configured so that it can be bolted and disconnected along the front-rear direction while facing each other in the front-rear direction. Although not shown, the overlapping portions of the two divided bodies B1 and B2 are fixed with a plurality of screws. These screws are also removable.

A part of the divided body B1 is supported by the radiator 17, and the other divided body B2 is separated from the radiator 17. - 特許庁Mounting brackets 64 are provided on the upper surface of the upper portion 19a and the lower surface of the lower portion 19b at intervals in the front-rear direction. Each mounting bracket 64 is connected to a mounting portion 65 provided on the radiator 17 with a bolt while the fan shroud 19 is in the proper mounting position. The other divided body B2 is separated from the radiator 17, but can be connected to a part of the divided body B1 attached to the radiator 17 by the upper and lower flange connecting portions 63. As shown in FIG.

A part of the divided body B1 can be pulled out rearward along the direction in which the radiator 17 is pulled out and removed integrally. When removing a part of the divided body B1, if the connection by the upper and lower flange connecting portions 63 is released, the other divided body B2 falls sideways on the spot because there is nothing to support. A part of the divided body B1 can be removed rearward without interfering with the cooling fan 18. - 特許庁When removing the radiator 17, a part of the divided body B1 can also be removed at the same time. If the connection between the part of the divided body B1 and the radiator 17 is released, only the part of the divided body B1 can be removed.

[Another embodiment]
(1) In the above embodiment, the left vertical wall portion 19e1 is screwed and fixed, but the left vertical wall portion 19e1 is integrally formed with the upper portion 19a, the lower portion 19b and the rear portion 19c. It's okay.

(2) In the above embodiment, the right vertical wall portion 19e2 and the front portion 19d are integrally formed. Anything is fine.

(3) In the above embodiment, the other divided body B2 is separated from the radiator 17, but instead of this construction, the other divided body B2 may be supported by the radiator 17. FIG.

(4) In the above embodiment, the fan shroud 19 is divided into two divided bodies B1 and B2. It may be configured to be

(5) In the above embodiment, the cleaning port 57 (opening) penetrating vertically through the lower frame-shaped portion 45 is formed. However, instead of this configuration, the cleaning port 57 may not be formed. .

INDUSTRIAL APPLICABILITY The present invention can be applied to harvesting machines such as ordinary combine harvesters and self-throwing combine harvesters, agricultural working machines such as tractors and rice transplanters, and can be applied not only to agricultural working machines but also to working machines such as construction machines.

16 engine 17 radiator 18 cooling fan 19 fan shroud 19a upper portion 19b lower portion 19c front portion 19d rear portion 19e vertical wall portion 19e1 front vertical wall portion 19e2 rear vertical wall portion 20 engine room 21 engine bonnet 22 dustproof case 26 support frame 43 lower frame portion 55 opening 57 cleaning port (opening)
58 Lid 60 Ventilation Opening 61 Peripheral Wall 62 Boundary

Claims (7)

an engine bonnet that covers the engine to form an engine room, supports the driver's seat from below, and opens laterally outward;
a radiator for cooling the engine provided laterally outside of the engine in the engine room;
a dustproof case provided laterally outside of the radiator and blocking the laterally outside of the radiator while allowing ventilation and preventing the passage of dust;
a cooling fan that is provided laterally inside the radiator and draws outside air through the dustproof case to cool the radiator;
a fan shroud extending over the cooling fan and the radiator while enclosing the outer circumference of an air intake space between the cooling fan and the radiator, and guiding outside air from the radiator to the cooling fan;
a support frame provided across an opening formed laterally inside the dustproof case and the radiator and supporting the radiator;
the radiator is supported by the support frame so as to be slidable rearward along the cooling surface;
An opening is formed in the rear part of the engine room so that the radiator can be pulled out to the rear ,
The fan shroud is configured to be dividable into a plurality of divided bodies in the circumferential direction, some of the plurality of divided bodies are supported by the radiator, and A working machine in which another divided body is separated from the radiator . 2. The working machine according to claim 1 , wherein the partial divided body is detachably supported by the radiator and can be pulled out and removed rearward along a direction in which the radiator is pulled out and removed. The fan shroud includes an upper portion covering the upper side of the air intake space, a lower portion covering the lower side of the air intake space, and a front side portion covering the front side of the air intake space in the removal direction. , is removable . The working machine according to claim 3 , wherein the upper portion, the lower portion, and the front portion are integrally formed. A vertical wall portion of the fan shroud that covers the side surface of the air intake space on the side of the cooling fan is positioned on the front side in the removal direction and on the back side in the removal direction. It is divided into the back side vertical wall part and the
The front vertical wall portion can be removed rearward integrally with the upper portion, the lower portion, and the front portion, and
5. The working machine according to claim 4 , wherein the depth side vertical wall portion is provided integrally with a depth side portion that covers the depth side of the intake space in the removal direction. An air intake opening through which air is drawn by the cooling fan is formed in the vertical wall portion,
A peripheral wall portion protruding toward the cooling fan is formed on the outer peripheral portion of the air intake opening,
The cooling fan is provided in a state of entering the peripheral wall,
A boundary between the front side vertical wall portion and the back side vertical wall portion of the peripheral wall portion is connected so as to be unconnectable,
The working machine according to claim 5 , wherein the upper portion, the lower portion, and the front portion are supported by the radiator. The support frame is formed in a four-sided frame shape along the outer periphery of the radiator, and an opening penetrating vertically is formed in a lower frame-shaped portion,
The work machine according to any one of claims 1 to 6 , further comprising a lid capable of opening and closing the opening.

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