JP2017200469A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle capable of increasing an air flow without increasing wind speed of ambient air supplied to a radiator or the like.SOLUTION: A work vehicle comprises: a radiator 31 for cooling water for cooling for an engine 14; a first suction case 50 which is provided on outside of a vehicle body of the radiator 31, and closes the outside of the vehicle body of the radiator 31 in a state of allowing air permeation and inhibiting passage of dusts; and a cooling fan 32 which is provided on inside of the vehicle body of the radiator 31, which draws ambient air thereinto through the first suction case 50 by rotation drive, for cooling the radiator 31. The work vehicle further comprises a second suction case 57 which is provided in a state of allowing air permeation and inhibiting passage of the dusts, and communicating to an internal space S of the first suction case 50, in which the ambient air is drawn through the second suction case 57 and is distributed into the internal space S by rotation drive of the cooling fan 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a work vehicle.

  A conventional work vehicle is described in Patent Document 1, for example. The work vehicle includes a radiator that cools engine cooling water, an air intake case that is provided outside the radiator body, blocks air from passing through the radiator, and blocks the passage of dust. And a cooling fan that is provided on the inner side of the machine body and draws outside air through the intake case by rotation driving to cool the radiator.

JP 2014-125106 A

  In the above conventional technique, since the outside air is drawn from only one intake case, the cooling efficiency of the radiator or the like may be reduced. In order to improve the cooling efficiency of a radiator or the like, it is conceivable to increase the speed of the cooling fan to increase the speed of the outside air supplied to the radiator or the like. There is a risk that dust such as soot will easily stick to the case and the like, and conversely the cooling efficiency will decrease, and maintenance work such as cleaning will increase.

  In view of the above situation, it has been desired to provide a work vehicle capable of increasing the air volume without increasing the wind speed of the outside air supplied to the radiator or the like.

The work vehicle of the present invention is
A radiator for cooling the engine coolant,
A first intake case that is provided on the outside of the radiator body, and that allows ventilation and blocks the passage of dust;
A cooling fan that is provided inside the radiator body and draws outside air through the first intake case by rotational driving to cool the radiator;
A state in which ventilation is allowed and passage of dust is prevented, and a second intake case provided in a state communicating with the internal space of the first intake case is provided,
When the cooling fan is driven to rotate, outside air is drawn through the second intake case and flows into the internal space.

According to the present invention, when the cooling fan is driven to rotate, outside air is drawn from the first intake case itself, and outside air drawn from the second intake case is circulated into the internal space of the first intake case. It is possible to increase the air volume of the outside air supplied from the internal space to the radiator or the like, and the cooling efficiency of the radiator or the like can be improved. Further, since the rotation speed of the cooling fan is not increased, the wind speed of the outside air supplied to the radiator or the like does not increase, and dust such as dust does not easily stick to the outside of the first intake case, for example. Thus, it is possible to avoid inconveniences such as a decrease in cooling efficiency and an increase in maintenance work such as cleaning.
Thus, according to the present invention, the air volume can be increased without increasing the wind speed of the outside air supplied to the radiator or the like.

In the present invention,
It is preferable that the second intake case is positioned on the inner side of the airframe than the first intake case.

  According to this configuration, the second air intake case is disposed without projecting laterally outside the airframe than the first air intake case, and the lateral width of the traveling airframe is not increased.

In the present invention,
The second intake case is preferably provided at a position adjacent to the first intake case.

  According to this configuration, since the first intake case is disposed near the second intake case, the connecting member that communicates the second intake case with the first intake case can be configured compactly.

In the present invention,
The engine is provided below the driver seat,
An engine hood that covers the engine and forms an engine room, supports the driver's seat from below, and is open to the outside of the fuselage;
The radiator is provided on the outer side of the engine body in the engine room,
The first intake case is provided in a state in which an open portion to the outside of the fuselage in the engine room is closed, and an intake portion is provided outside the fuselage of the first intake case. An opening corresponding to the open part is provided inside the fuselage,
On the front side of the engine bonnet, a foot space in which a driver's lower limb seated on the driver's seat is located is provided,
The second intake case is preferably provided in the foot space.

According to this configuration, the engine bonnet that covers the engine is also used as a support member for the driver's seat. It has a basic structure in which outside air flows from the airframe laterally outward to the airframe laterally inward from the air intake part of the first air intake case provided in a state where the part is closed to the opening part and the open part of the engine room. .
In such a basic structure, a second air intake case communicating with the first air intake case is provided in the driver's foot space. This second air intake case draws in air with relatively little dust and other dust mixed in the airframe inner portion of the traveling aircraft, so that dust such as dust is less likely to enter the engine room. Problems such as clogging are less likely to occur. Moreover, it becomes possible to make the second intake case function as a heat insulating member, and it becomes difficult for the heat of the engine or the like to reach the lower limbs of the driver sitting on the driver seat while eliminating the need for a dedicated heat insulating member.

In the present invention,
The second intake case is provided in a state adjacent to the front side of the front wall portion of the engine bonnet in the foot space,
It is preferable that an air intake portion is provided on a front surface portion of the second air intake case, and an airframe lateral outer end portion of the second air intake case is connected to a front end portion of the first air intake case.

  According to this configuration, since the second intake case is located on the rear side of the lower limb of the driver seated on the driver's seat, the heat of the engine or the like can be suppressed from reaching the rear side of the lower limb of the driver. The first intake case and the second intake case as a whole can be arranged compactly so as to be substantially L-shaped when viewed from above. And since external air is drawn in from the intake part of the front part of the second intake case and supplied to the front end of the first intake case, the flow of the external air from the second intake case to the first intake case becomes smooth.

In the present invention,
A first dust net is provided in the intake portion of the first intake case,
A cooling device different from the radiator is provided between the first dust net and the radiator,
It is preferable that a second dust net that is finer than the first dust net is provided between the first dust net and the cooling device so as to cover the outer side of the airframe of the cooling device.

  According to this configuration, after the large dust contained in the outside air is removed by the first dust net of the first intake case, the small dust contained in the outside air by the second dust net that is finer than the first dust net. Is removed, so that dust such as soot does not easily enter the engine room.

In the present invention,
A cooling device different from the radiator is provided between the first intake case and the radiator,
A fan shroud that is provided to span the cooling fan and the radiator in a state of surrounding an outer periphery of a space between the cooling fan and the radiator, and guides outside air from the radiator to the cooling fan;
It is preferable that a support case is provided so as to extend over the opening and the fan shroud so as to surround the outer periphery of the radiator and the cooling device, and support the radiator and the cooling device.

  According to this configuration, since the radiator and the cooling device are supported by the support case, the support case can seal the space formed between the opening of the first intake case and the fan shroud. It becomes difficult for outside air to flow into the engine room through locations other than the interior space of the intake case, and dust such as sawdust can be prevented from entering the engine room.

In the present invention,
A fan shroud that is provided to span the cooling fan and the radiator in a state of surrounding an outer periphery of a space between the cooling fan and the radiator, and guides outside air from the radiator to the cooling fan;
It is preferable that a support case is provided so as to extend over the opening and the fan shroud so as to surround the outer periphery of the radiator and the cooling device, and support the radiator and the cooling device.

  According to this configuration, since the radiator and the cooling device are supported by the support case, the support case can seal the space formed between the opening of the first intake case and the fan shroud. Only outside air that has passed through the dust screen is supplied to the engine room, making it difficult for outside air to flow into the engine room through locations other than the interior space of the first intake case, and preventing dust and other dust from entering the engine room. it can.

In the present invention,
As the cooling device, an intercooler and an oil cooler are provided,
It is preferable that the oil cooler is provided on the outer side of the radiator body and on the lower side of the intercooler.

  According to this structure, an oil cooler can be suitably arrange | positioned using the space below the body side of a radiator, and the lower side of an intercooler. Thereby, a radiator, an intercooler, and an oil cooler can be cooled suitably by the rotational drive of a cooling fan.

In the present invention,
As the oil cooler, an oil cooler for work equipment and an oil cooler for transmission are provided,
It is preferable that the work equipment oil cooler and the transmission oil cooler are arranged side by side in a state of being displaced forward and backward.

  According to this configuration, the work implement machine oil cooler and the transmission oil cooler can be arranged compactly in the front-rear direction.

In the present invention,
It is preferable that the air intake portion of the first air intake case is provided from the upper part to the lower part of the first air intake case outside the body.

  According to this configuration, a wide opening area of the intake portion of the first intake case is secured, and a sufficient amount of outside air can be drawn into the radiator side through the intake portion of the first intake case.

In the present invention,
The amount of outside air drawn into the radiator is adjusted between a lower intake portion of the intake portion of the first intake case and a lower opening portion corresponding to the lower intake portion of the opening portion. It is preferable that an air volume adjusting plate is provided.

  According to this configuration, the air volume adjusting plate acts as a resistance to suppress the intake of outside air from the lower intake part, and the intake of outside air from the other intake parts to the first intake case is promoted, and all the intake parts It is possible to draw outside air evenly from the first intake case. As a result, the air volume of the outside air drawn into the first intake case can be increased.

It is a side view of a normal combine. It is a top view of a normal combine. It is a fragmentary sectional view of the upper surface view which shows the circumference | surroundings of a driving | operation part, and shows a part of 1st intake case and 2nd intake case in a cross section. It is a fragmentary sectional view of the side view which shows the periphery of a 1st intake case, a connection member, a 2nd intake case, etc., and shows a part of 1st intake case and a connection member in a cross section. It is a fragmentary sectional view of the front view which shows periphery, such as a 1st intake case, a connection member, and a 2nd intake case, and shows some connection members, a floor panel, etc. in a cross section. FIG. 3 is a side view showing a periphery of a radiator or the like and showing an engine bonnet, a second intake case, and the like in cross section. It is a fragmentary sectional view of the front view which shows the periphery of a radiator etc., shows a support case etc. by a cross section, and shows the open state of a 1st intake case. It is a fragmentary sectional view of the rear view which shows opening and closing of a 1st intake case. It is a fragmentary sectional view of the front view which shows opening and closing of an engine bonnet. It is a side view of the normal type combine in another embodiment.

Hereinafter, an embodiment which is an example of the present invention will be described with reference to the drawings.
In the following description, regarding a traveling machine body of an ordinary combine (an example of “work vehicle”), the direction of arrow F shown in FIG. 2 is “front of body”, the direction of arrow B is “back of body”, and arrow L The direction of the aircraft is “left of the aircraft” and the direction of the arrow R is “right of the aircraft”.

  As shown in FIG. 1 and FIG. 2, the traveling machine body of the normal type combine has a pair of left and right crawler type traveling devices 10 and a body frame 11 assembled in a frame shape supported by the traveling device 10. Is provided. At the front end of the machine body frame 11, a reaping part 12 for reaping the planted cereal grains is provided so as to be movable up and down. An operation unit 13 is provided behind the mowing unit 12. An engine room ER in which the engine 14 is disposed is provided below the operation unit 13. Behind the operation unit 13, a threshing device 15 that threshs the whole grain of the harvested cereal and a Glen tank 16 that stores the grain are provided adjacent to each other in the left-right direction. Between the reaping unit 12 and the threshing device 15, a feeder 17 that conveys the reaped cereal from the reaping unit 12 to the threshing device 15 is provided. An unloader 18 capable of discharging the grains in the grain tank 16 is connected to the grain tank 16.

[About the driving section]
As shown in FIGS. 1 to 5, 7, and the like, the driver 13 includes a driver seat 19 on which a driver can sit, a floor panel 20 on which a driver's feet seated on the driver seat 19 are located, a driver seat A control tower 21 that stands up in front of 19, a side panel 22 that is located laterally of the driver's seat 19, a plurality of operation levers 23 that perform various operation inputs, and a saddle member that is located above the driver's seat 19 24 etc. are provided. An engine hood 25 that covers the engine 14 and forms an engine room ER, supports the driver's seat 19 from the lower side, and is opened to the outside of the aircraft body is provided below the driver 13. Yes. The floor panel 20 is supported by a box-shaped support frame 26 erected on the body frame 11.

  As shown in FIG. 3 to FIG. 7 and the like, the engine bonnet 25 includes a vertical plate-shaped front wall portion 27, a horizontal plate-shaped top plate portion 28 connected to the upper end portion of the front wall portion 27, and a top plate A vertical plate-like rear wall portion 30 connected to the rear end portion of the portion 28 is provided. The side of the engine bonnet 25 on one side of the machine body is open to the outside.

[About engine room]
As shown in FIG. 7 and the like, the engine room ER includes an engine 14 provided below the driver seat 19, a radiator 31 that cools the cooling water of the engine 14, a cooling fan 32 that generates wind by rotational driving, A cooling device 33 other than the radiator 31, a radiator 31, a support case 34 that supports the cooling device 33, a fan shroud 35 that guides outside air from the radiator 31 to the cooling fan 32, and the like are provided.

  The cooling device 33 includes an intercooler 36 for cooling the compressed air supplied to the engine 14 and an oil cooler 37 for cooling the hydraulic oil. The oil cooler 37 includes a work equipment oil cooler 38 and a transmission oil cooler 39. The work equipment is the cutting unit 12 or the like.

  As shown in FIG. 7, the radiator 31 is provided on the laterally outer side of the engine 14 in the engine room ER. The fan shroud 35 is provided so as to extend between the cooling fan 32 and the radiator 31 so as to surround the outer periphery of the space between the cooling fan 32 and the radiator 31. The oil cooler 37 is provided on the lateral side outside the body of the radiator 31 and below the intercooler 36. As the oil cooler 37, a work equipment oil cooler 38 and a transmission oil cooler 39 are provided. As shown in FIGS. 6 and 7, the work equipment oil cooler 38 and the transmission oil cooler 39 are arranged side by side in a state of being displaced forward and backward.

  As shown in FIGS. 6 and 7, the radiator 31 is connected to the engine 14 by an upper hose 40 having flexibility and a lower hose 41 having flexibility. The intercooler 36 is connected to the supercharger on the side of the air cleaner 72 (see FIG. 1) by a flexible forward pipe 42 and is connected to the engine 14 by a flexible backward pipe 43. The work equipment oil cooler 38 is connected to the work equipment oil path by a first forward hose 44 and a first return hose 45. The transmission oil cooler 39 is connected to the transmission oil path by a second forward path hose 46 and a second return path hose 47.

  As shown in FIG. 1 to FIG. 3, FIG. 5 to FIG. 7, etc., the cooling fan 32 is linked to the output shaft of the engine 14 and draws outside air by rotational driving to cool the radiator 31 and the like. Yes. The cooling fan 32 is provided inside the radiator 31. As the cooling fan 32 is driven to rotate, wind is generated from the radiator 31 side toward the engine 14 side.

  As shown in FIG. 6, the rotation locus P of the cooling fan 32 overlaps with the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 in a side view. Specifically, the rotation locus P of the cooling fan 32 overlaps the entire radiator 31 in a side view. Further, the rotation locus P of the cooling fan 32 overlaps with the lower part of the intercooler 36 in a side view. Further, the rotation locus P of the cooling fan 32 overlaps with the upper portion of the work equipment oil cooler 38 in a side view. Further, the rotation locus P of the cooling fan 32 overlaps with the transmission oil cooler 39 in a side view. The rotating shaft 48 of the cooling fan 32 is located in front of the front-rear center of the radiator 31.

  As shown in FIGS. 6, 7, etc., the support case 34 is provided with a plurality of mounting frames 49 arranged vertically. The intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 are connected to each other by a bolt or the like over a plurality of mounting frames 49.

[About the first intake case]
As shown in FIG. 1 to FIG. 5 and FIG. 7, a first intake case 50 as a dustproof case is provided on the lateral side outer side of the engine room ER. The first intake case 50 is provided on the outer side of the radiator 31, the intercooler 36, and the oil cooler 37. The first intake case 50 is configured to block the outside of the radiator 31, the intercooler 36, and the oil cooler 37 in a state that allows ventilation and prevents the passage of dust.

  As understood from FIGS. 5, 7, etc., the first intake case 50 is provided in a state of closing the opening 51 to the outside of the vehicle body in the engine room ER. The opening 51 is formed on the side of the engine bonnet 25 on one side of the machine body. An air intake portion 52 is provided outside the airframe of the first air intake case 50.

  As shown in FIG. 1, FIG. 5, FIG. 7, etc., a plurality of air intake portions 52 of the first air intake case 50 are provided from the upper part to the lower part of the first air intake case 50 outside the fuselage. The plurality of intake sections 52 are provided with four main intake sections 52A on the upper side and a lower intake section 52B positioned on the lower side of the main intake section 52A (the lowest side among the plurality of intake sections 52). ing. An opening 53 corresponding to the opening 51 of the engine room ER is provided inside the body of the first intake case 50. The opening 53 is provided with a main opening 53A and a lower opening 53B located below the main opening 53A and corresponding to the lower intake part 52B.

  As shown in FIGS. 5 and 7, between the lower intake part 52 </ b> B of the intake part 52 of the first intake case 50 and the lower opening 53 </ b> B corresponding to the lower intake part 52 </ b> B of the opening 53. An air volume adjusting plate 76 for adjusting the air volume of the outside air drawn into the radiator 31 is provided. The air volume adjusting plate 76 is located between the cooling fan 32 and the lower intake portion 52B. The air volume adjusting plate 76 is located between the cooling fan 32 and the lowermost main intake section 52A.

  The air volume adjusting plate 76 is made of, for example, a vertical plate-shaped punching metal provided with a large number of ventilation holes. The air volume adjusting plate 76 is supported by the first intake case 50 at a plurality of locations extending in the vertical direction. The lower end portion of the air volume adjusting plate 76 is attached and supported by a member on the body frame 11 side via an angle-shaped attachment 77. The air volume adjusting plate 76 acts as a resistance to suppress the intake of outside air from the lower intake part 52B, and the first intake from the intake part 58 of the second intake case 57 and the intake part side of the third dust net 56 described later. The drawing of the outside air into the case 50 is promoted, and it becomes possible to draw the outside air from all the intake portions into the first intake case 50 evenly. As a result, the air volume of the outside air drawn into the first intake case 50 can be increased.

  As shown in FIGS. 1, 3 to 5, and 7, the intake portion 52 of the first intake case 50 includes a first dust net 54 that allows ventilation and prevents the passage of dust. . The first dust net 54 includes a main dust net 54A corresponding to each main air intake 52A and a lower dust net 54B located below the main dust net 54A and corresponding to the lower air intake 52B. . The main dust net 54 </ b> A is bolted from the inside of the first intake case 50. The lower dust net 54 </ b> B is bolted from the outside of the first intake case 50. The radiator 31 is cooled by drawing the outside air through the first intake case 50 by the rotational drive of the cooling fan 32. Between the first dust screen 54 and the cooling device 33, the air passage is allowed and the passage of dust is prevented while covering the lateral outer side of the cooling device 33. Two dustproof nets 55 are provided. A third dust net 56 that allows ventilation and prevents the passage of dust is provided in a portion of the inner side of the first intake case 50 that is located on the lateral side of the driver seat 19. When the cooling fan 32 is driven to rotate, the air in the vicinity of the driver seat 19 is drawn into the internal space S of the first intake case 50 through the third dust net 56.

  As shown in FIG. 3, FIG. 7, etc., the intercooler 36 and the oil cooler 37 that are the cooling devices 33 are provided between the first intake case 50 and the radiator 31. In other words, the intercooler 36 and the oil cooler 37 that are the cooling device 33 are provided between the first dust net 54 and the radiator 31.

[About the second intake case]
As shown in FIG. 3 and the like, there is provided a second intake case 57 that is provided in a state that allows ventilation and prevents the passage of dust and that communicates with the internal space S of the first intake case 50. Yes. The second intake case 57 is located on the inner side of the airframe than the first intake case 50. The second intake case 57 is provided at a position adjacent to the first intake case 50. The second intake case 57 has a box shape. The second intake case 57 projects forward from the front end portion of the driver seat 19. The rear part of the second intake case 57 is closed. The driver seat 19 can be slid in the front-rear direction. When the driver seat 19 is slid forward from the state shown in FIG. 3, the second intake case 57 overlaps the driver seat 19 behind the front end of the driver seat 19 in a top view. Become.

  As shown in FIGS. 1 to 4, a front space of the engine bonnet 25 is provided with a foot space K in which a lower leg of the driver seated on the driver seat 19 is located. The second intake case 57 is provided in the foot space K. The second intake case 57 is provided adjacent to the front side of the front wall portion 27 of the engine bonnet 25 in the foot space K. An intake portion 58 is provided on the front surface portion of the second intake case 57.

  As shown in FIGS. 3 to 6, the intake portion 58 of the second intake case 57 is provided with a fourth dust net 59 that allows ventilation and prevents the passage of dust. The fourth dust net 59 is detachably attached to the main body portion of the second intake case 57 with a bolt or the like.

  As understood from FIGS. 1, 4, etc., the second intake case 57 is located between the front wall portion 27 of the engine bonnet 25 and the lower limbs of the driver, and outside air is placed in the second intake case 57. Since the space for circulation is secured, it also has a function of heat insulation and heat insulation so that the heat of the engine 14 does not reach the lower limbs of the driver.

  As shown in FIGS. 1 to 5, the airframe lateral outer end portion of the second intake case 57 is coupled to the front end portion of the first intake case 50 via a connection member 60 that is triangular in a top view. ing. The connection member 60 supplies the outside air drawn from the second intake case 57 to the internal space S of the first intake case 50. The connection member 60 is fixed to the first intake case 50.

[Flow of outside air taken into the engine room]
When the cooling fan 32 is driven to rotate, as shown in FIG. 3, the outside air passes through the first dust net 54 and the third dust net 56 of the first intake case 50 and the internal space S of the first intake case 50 becomes the outside space S. Be drawn. Further, by the rotational drive of the cooling fan 32, outside air is drawn through the second intake case 57 and flows into the internal space S of the first intake case 50. Specifically, the outside air drawn into the second intake case 57 from the fourth dust net 59 communicates between the lateral outer end of the second intake case 57 and the lateral inner end of the connecting member 60. The internal space of the first intake case 50 through the second communication port portion 62 that enters the connection member 60 through the series of connection portions 61 and communicates the rear end portion of the connection member 60 and the front end portion of the first intake case 50. S is supplied.

  As shown in FIGS. 4 to 7, the outside air drawn into the internal space S of the first intake case 50 passes through the second dust net 55, intercooler 36, work equipment oil cooler 38, and transmission. It flows through the oil cooler 39, the radiator 31, and the fan shroud 35 to the engine 14 side.

  As shown in FIG. 7, since the air guide path from the second dust net 55 to the ventilation opening 63 of the fan shroud 35 is sealed by a plurality of seal members 64 and the like, it passes through a path other than the first intake case 50. It is possible to prevent outside air from being drawn toward the vent 63 of the fan shroud 35 and the like.

[About opening and closing the first air intake case]
1, 4, 5, and 7, the first intake case 50 is arranged around the longitudinal axis X of a pair of front and rear fulcrum pins 65 located at the lower part of the first intake case 50. By swinging, the state can be switched between the normal state A1 (see FIGS. 1 to 5) and the open state A2 (see FIG. 7). The front fulcrum pin 65 is inserted and supported by a vertical plate-like stay 73 fixed to the body frame 11. The rear fulcrum pin 65 is inserted and supported by an L-shaped bracket 75 that is detachably attached to the body frame 11 via a fastener 74 constituted by a bolt or the like.

  As shown in FIG. 5 and the like, the first intake case 50 in the normal state A1 is in the vertical upright posture by the locking tool 66 constituted by a pair of front and rear toggle latches, and the opening 51 of the engine room ER is opened. It will be in a closed state. The locking tool 66 includes a hook portion 67 and a latch portion 68 that can be hooked on the hook portion 67. A hook portion 67 of the front locking member 66 is attached to the second intake case 57. The hook portion 67 of the front locking tool 66 is attached to the connection member 60. The hook portion 67 of the rear locking tool 66 is attached to the rear wall portion 30 of the engine bonnet 25. The latch portion 68 of the rear locking tool 66 is attached to the first intake case 50. As shown in FIG. 1, the right side wall of the Glen tank 16 extends so as to be as close as possible to the first intake case 50. On the right side wall of the first intake case 50, a cutout portion 16A that is partially cutout is provided. The rear locking tool 66 can be operated through the notch 16A.

  When the pair of front and rear locking members 66 are released, the first intake case 50 swings around the front and rear axis X of the fulcrum pin 65, and as shown in FIG. The strip 79 holds the position in an inclined posture. One end of the rope 79 is supported by the upper end of the vertical frame on the side of the body frame 11, and the other end of the rope 79 is supported by the first intake case 50. Thereby, the 1st intake case 50 will be in the open state A2 (refer FIG. 7) which open | releases the opening part 51 of engine room ER. In addition, the rope body 79 may be configured by a chain or the like.

  The connection member 60 shown in FIG. 5 and the like swings integrally with the first intake case 50. Further, when the first intake case 50 is opened, the second intake case 57 remains on the engine bonnet 25 side without swinging integrally with the first intake case 50.

  As shown in FIG. 7, the second dust net 55 is exposed by opening the first intake case 50 to the open state A2. When the second dust net 55 is moved upward, the locking portion 69 of the second dust net 55 is detached from the support case 34 and the second dust net 55 can be removed. By removing the second dust net 55, the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 are exposed to the outside.

  By removing the fastener 74 shown in FIG. 4, the bracket 75 and the rear fulcrum pin 65 can be removed from the body frame 11 and the first intake case 50. Accordingly, the front fulcrum pin 65 can be removed from the stay 73 by moving the first intake case 50 and the connection member 60 rearward, whereby the first intake case 50 and the connection member 60 are integrated. In addition, it can be removed from the body frame 11 side. Further, by performing the reverse procedure, the first intake case 50 and the connection member 60 can be integrally attached to the body frame 11 side.

[Opening the engine bonnet]
As shown in FIG. 9, the engine bonnet 25 swings around the longitudinal axis X and can be switched between a normal use state B1 and a maintenance state B2 in which the engine room ER is opened. The top plate portion 28 of the engine bonnet 25 and the side panel 22 are connected via a connecting tool 78 formed of a toggle latch. By releasing the connection tool 78, the engine bonnet 25 can be switched from the use state B1 to the maintenance state B2. The driver seat 19, the first intake case 50, the second intake case 57, and the connection member 60 are configured to swing integrally with the engine bonnet 25.

[Removing the support case]
The support case 34 shown in FIGS. 6, 7, and the like is positioned at the rear of the first fixture 70, for example, configured with bolts, and the second fixture 71 configured with, for example, bolts. It is detachable with. In order to remove the support case 34, the first fixture 70 can be removed, and the support case 34 can be moved forward of the machine body and removed from the second fixture 71.

  As shown in FIG. 7, the support case 34 is provided across the opening 53 of the first intake case 50 and the fan shroud 35 in a state of surrounding the outer periphery of the radiator 31 and the cooling device 33. The support case 34 has a frame shape and is detachably supported by the body frame 11. When the support case 34 is removed from the body frame 11, the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 can be integrally removed together with the support case 34. This facilitates maintenance such as cleaning.

  In this manner, the radiator 31, the cooling device 33, and the like are arranged in a compact manner, and the radiator 31, the first intake case 50, and the second intake case 57 are used without increasing the speed at which the cooling fan 32 is rotationally driven. The cooling device 33 and the like can be efficiently cooled with a sufficient amount of outside air, and maintenance work such as cleaning is reduced.

[Another embodiment]
Hereinafter, another embodiment in which the above embodiment is modified will be exemplified. A plurality of the above-described embodiments and each of the separate embodiments can be selected and combined as long as no contradiction occurs. The scope of the present invention is not limited to the contents of each embodiment.

(1) In the above embodiment, the air volume adjustment plate 76 is exemplified, but the present invention is not limited to this. For example, the air volume adjusting plate 76 as described above may not be provided.

(2) In the above embodiment, the air intake portion 52 of the first air intake case 50 is exemplified as being provided from the upper part to the lower part of the air intake side of the first air intake case 50. However, the present invention is not limited to this. I can't. For example, as shown in FIG. 10, the air intake portion 52 of the first air intake case 50 is provided from the upper part of the first air intake case 50 to the upper and lower central parts, and The vicinity of the lower end portion of the side portion of the airframe may be closed. In other words, the lower intake part 52B may not be provided in the first intake case 50.

(3) In the above embodiment, the right side wall of the Glen tank 16 is extended so as to be as close as possible to the first intake case 50, but is not limited thereto. For example, as shown in FIG. 10, a predetermined gap in the front-rear direction may be provided between the right side wall of the glen tank 16 and the first intake case 50.

(4) In the above embodiment, the first intake case 50 is provided on the outer side of the radiator 31 on the fuselage, but the present invention is not limited to this. For example, the first intake case 50 may be provided on the front outer side of the radiator 31, the rear outer side of the aircraft, or the upper outer side of the aircraft.

(5) In the above embodiment, the second intake case 57 is located on the laterally inner side of the body relative to the first intake case 50, but the present invention is not limited to this. For example, the second intake case 57 may protrude somewhat outward from the first intake case 50.

(6) In the above embodiment, the second intake case 57 is provided at a position adjacent to the first intake case 50, but the present invention is not limited to this. For example, the second intake case 57 is provided at a location away from the first intake case 50, and the second intake case 57 and the first intake case 50 are connected by another connecting member 60. May be. That is, the second intake case 57 may be provided at a place other than the foot space K of the operating unit 13.

(7) In the above embodiment, the engine 14 is illustrated below the driver seat 19, but is not limited thereto. The engine 14 may be provided at a location away from the driver seat 19.

(8) In the embodiment described above, the second dustproof net 55 that is finer than the first dustproof net 54 is provided between the first dustproof net 54 and the cooling device 33. It is not limited to this. For example, the second dust net 55 may have the same fineness as the first dust net 54. Further, the second dust net 55 may not be provided.

(9) In the above embodiment, the third dustproof net 56 is exemplified, but the present invention is not limited to this. For example, the third dust net 56 may not be provided, and the portion corresponding to the third dust net 56 may be closed.

(10) In the above embodiment, the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 are supported by the support case 34 so as to be detachable as an integral assembly. However, it is not limited to this.
For example, each of the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 may be supported by separate support members.
Further, for example, any one of the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 is supported by the support case 34, and the remaining three equipments are supported by the other support members. You may make it make it. In this case, the remaining three devices may be supported by separate support members.
Further, for example, any two devices among the radiator 31, the intercooler 36, the work equipment oil cooler 38, and the transmission oil cooler 39 are supported by the support case 34, and the remaining two devices are supported by other support members. You may make it make it. In this case, the remaining two devices may be supported by separate support members.
Further, for example, any three devices among the radiator 31, the intercooler 36, the work device oil cooler 38, and the transmission oil cooler 39 are supported by the support case 34, and the remaining one device is used as another support member. You may make it support.

(11) In the above embodiment, the transmission oil cooler 39 is illustrated, but the present invention is not limited to this. For example, the transmission oil cooler 39 may not be provided.

(12) In the above embodiment, the traveling device 10 is a crawler type, but is not limited thereto. For example, the wheel-type traveling device 10 may be used.

  INDUSTRIAL APPLICABILITY The present invention can be used for various work vehicles such as a self-removing combine, a corn harvester, a tractor, a mower, and a construction machine in addition to the above-described ordinary combine.

14: Engine 19: Driver's seat 25: Engine bonnet 27: Front wall portion 31: Radiator 32: Cooling fan 33: Cooling device 34: Support case 35: Fan shroud 36: Intercooler 37: Oil cooler 38: Oil cooler for work equipment 50: First intake case 51: Opening portion 52: First intake case intake portion 52B: Lower intake portion 53: Opening portion 53B: Lower opening portion 54: First dust net 55: Second dust net 57: Second intake Case 58: Air intake portion 76 of the second air intake case: Air volume adjusting plate ER: Engine room K: Foot space S: Internal space

Claims (12)

A radiator for cooling the engine coolant,
A first intake case that is provided on the outside of the radiator body, and that allows ventilation and blocks the passage of dust;
A cooling fan that is provided inside the radiator body and draws outside air through the first intake case by rotational driving to cool the radiator;
A state in which ventilation is allowed and passage of dust is prevented, and a second intake case provided in a state communicating with the internal space of the first intake case is provided,
A work vehicle in which outside air is drawn through the second air intake case and circulates in the internal space by rotational driving of the cooling fan.   2. The work vehicle according to claim 1, wherein the second intake case is located on a laterally inner side of the body than the first intake case.   The work vehicle according to claim 1, wherein the second intake case is provided at a position adjacent to the first intake case. The engine is provided below the driver seat,
An engine hood that covers the engine and forms an engine room, supports the driver's seat from below, and is open to the outside of the fuselage;
The radiator is provided on the outer side of the engine body in the engine room,
The first intake case is provided in a state in which an open portion to the outside of the fuselage in the engine room is closed, and an intake portion is provided outside the fuselage of the first intake case. An opening corresponding to the open part is provided inside the fuselage,
On the front side of the engine bonnet, a foot space in which a driver's lower limb seated on the driver's seat is located is provided,
The work vehicle according to claim 1, wherein the second intake case is provided in the foot space. The second intake case is provided in a state adjacent to the front side of the front wall portion of the engine bonnet in the foot space,
The work according to claim 4, wherein an air intake portion is provided on a front surface portion of the second air intake case, and an airframe lateral outer end portion of the second air intake case is coupled to a front end portion of the first air intake case. car. A first dust net is provided in the intake portion of the first intake case,
A cooling device different from the radiator is provided between the first dust net and the radiator,
6. A second dust net that is finer than the first dust net is provided between the first dust net and the cooling device so as to cover a lateral outer side of the cooling device. Work vehicle as described in. A cooling device different from the radiator is provided between the first intake case and the radiator,
A fan shroud that is provided to span the cooling fan and the radiator in a state of surrounding an outer periphery of a space between the cooling fan and the radiator, and guides outside air from the radiator to the cooling fan;
6. A support case that is provided so as to extend over the opening and the fan shroud in a state of surrounding the outer periphery of the radiator and the cooling device, and that supports the radiator and the cooling device. Work vehicle as described in. A fan shroud that is provided to span the cooling fan and the radiator in a state of surrounding an outer periphery of a space between the cooling fan and the radiator, and guides outside air from the radiator to the cooling fan;
The support case which is provided so that it may cover the said opening and the said fan shroud in the state which surrounds the outer periphery of the said radiator and the said cooling device, and supports the said radiator and the said cooling device is provided. Working vehicle. As the cooling device, an intercooler and an oil cooler are provided,
The work vehicle according to any one of claims 6 to 8, wherein the oil cooler is provided on a laterally outer side of the radiator and on a lower side of the intercooler. As the oil cooler, an oil cooler for work equipment and an oil cooler for transmission are provided,
The work vehicle according to claim 9, wherein the work equipment oil cooler and the transmission oil cooler are arranged side by side in a state of being displaced in the front-rear direction.   The work vehicle according to any one of claims 4 to 10, wherein the air intake portion of the first air intake case is provided from the upper part to the lower part of the first air intake case outside the body.   The amount of outside air drawn into the radiator is adjusted between a lower intake portion of the intake portion of the first intake case and a lower opening portion corresponding to the lower intake portion of the opening portion. The work vehicle according to any one of claims 4 to 11, further comprising an air volume adjusting plate.

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