CN114981504A - Cooling device for working vehicle - Google Patents

Abstract

A cooling device (10) for a work vehicle is provided with a radiator (20) for cooling engine cooling water by heat exchange with outside air introduced from the outside of a machine body, and an upper-side oil cooler (30) for cooling hydraulic oil of a hydraulic transmission. The radiator is further provided with a 1 st rotary blade (50), and the 1 st rotary blade (50) is arranged to overlap with the external air introduction side of the radiator (20). The upper oil cooler (30) is arranged in line with the radiator (20) and the 1 st rotating blade (50) in the direction of introduction of the outside air, such that the upper oil cooler overlaps the radiator (20) and the 1 st rotating blade (50) when viewed from the direction of introduction of the outside air. The cooling device (10) for a work vehicle can be miniaturized and can suppress the reduction of cooling efficiency.

Description

Cooling device for working vehicle Technical Field

The present invention relates to a cooling device for cooling a drive system of a work vehicle.

Background

As agricultural machines, work vehicles having functions of: while harvesting rice or wheat, threshing, accumulating and discharging the threshed grains. In many cases, the cooling device of the work vehicle cools the refrigerant that cools the drive system by heat exchange with outside air using a cooler.

However, since the work vehicle is used in an environment where dust easily flies, the cooling efficiency may be lowered and the drive system may be overheated due to the dust adhering to and accumulating in the cooler.

Therefore, for example, patent document 1 discloses a technique in which: a rotary blade that rotates by cooling air introduced in the machine body width direction is provided on the outside air introduction side of an intercooler (cooler), and dust adhering to the intercooler is removed using negative pressure generated by rotation of the rotary blade.

Patent document 1: japanese laid-open patent publication No. 2006 + 254800

However, a drive system of a work vehicle generally includes a plurality of devices such as an engine and a transmission. In addition, in the case where the engine is an engine coolant, and the hydraulic transmission is a hydraulic oil, a plurality of devices are often cooled independently by a plurality of refrigerants. Therefore, a cooling device for a work vehicle generally includes a plurality of coolers (a radiator, an oil cooler, and the like) corresponding to a plurality of refrigerants.

In this regard, the following layout is disclosed in the structure of the above patent document 1: the radiator and the intercooler are arranged in parallel in the front-rear direction of the body in a posture in which the surfaces of the radiator and the intercooler, on which the cooling air collides, face outward in the width direction of the body.

However, in such a layout, the cooling device including the plurality of coolers is enlarged in the front-rear direction of the body, and the engine room accommodating the cooling device is widened, with the result that: the work vehicle as a whole may become relatively large, and there is room for improvement in this respect.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique of: a cooling device for a work vehicle is reduced in size and suppressed in cooling efficiency.

In order to achieve the above object, in the cooling device for a work vehicle according to the present invention, a plurality of coolers and rotor blades are arranged to overlap each other when viewed from the width direction of the machine body.

Specifically, the present invention is directed to a cooling device for a work vehicle, the cooling device including a 1 st cooler and a 2 nd cooler, the 1 st cooler and the 2 nd cooler cooling a plurality of refrigerants that cool a drive system by heat exchange with outside air introduced from outside of a machine body, respectively.

The cooling device for a work vehicle is characterized by further comprising a 1 st rotary blade, the 1 st rotary blade being provided so as to overlap with the outside air introduction side of the 1 st cooler, and the 2 nd cooler being arranged in line with the 1 st cooler and the 1 st rotary blade in the outside air introduction direction so that at least a part of the 2 nd cooler overlaps with the 1 st cooler and the 1 st rotary blade when viewed from the outside air introduction direction.

According to this configuration, since the 1 st cooler and the 2 nd cooler are arranged in the direction of introduction of the outside air so as to at least partially overlap when viewed from the direction of introduction of the outside air, it is possible to suppress the cooling device from being enlarged in the direction orthogonal to the direction of introduction of the outside air, as compared with a case where they are arranged in parallel in a plane orthogonal to the direction of introduction of the outside air (hereinafter, also referred to as "parallel arrangement" for convenience).

Here, when the 1 st cooler and the 2 nd cooler are arranged in parallel in the direction of introduction of the outside air, the size of the cooling device itself in the direction of introduction of the outside air becomes larger than when they are arranged in parallel. However, in a cooler that exchanges heat with outside air introduced from outside the machine body, in order to increase the area on which cooling air collides, the dimension in the direction orthogonal to the direction of introduction of the outside air is generally significantly larger than the dimension in the direction of introduction of the outside air. Therefore, when the 1 st and 2 nd coolers are arranged in parallel, the engine room may be enlarged more than necessary. In contrast, in the present invention in which the 1 st cooler and the 2 nd cooler are arranged so as to overlap each other when viewed from the direction in which the outside air is introduced, the engine room can be suppressed from being enlarged more than necessary as compared with the case where they are arranged in parallel, and thus the entire cooling device can be downsized.

Further, since the 1 st rotating blade is provided so as to overlap the outside air introduction side of the 1 st cooler, it is possible to suppress a decrease in cooling efficiency due to adhesion of dust, and since at least a part of the 1 st rotating blade overlaps the 2 nd cooler as viewed from the outside air introduction direction, it is possible to reduce the size of the entire cooling device.

The 1 st rotor blade may be provided on the outside air introduction side of the 1 st cooler, and may be arranged in the order of the 2 nd cooler → the 1 st rotor blade → the 1 st cooler, or may be arranged in the order of the 1 st rotor blade → the 1 st cooler → the 2 nd cooler from the outside toward the inside in the outside air introduction direction.

As described above, in the cooling device for a work vehicle, it is preferable that: the 1 st cooler is a radiator that cools engine cooling water, and the 2 nd cooler is an oil cooler that cools hydraulic oil of a hydraulic transmission, and the oil cooler, the 1 st rotating blade, and the radiator are arranged in this order from an outside air introduction side to an inside.

In some cases, the work vehicle performs control such that: when the engine cooling water becomes high temperature, an alarm is issued, and finally the operation is stopped. According to this configuration, since the 1 st rotary blade corresponding to the radiator is provided, it is possible to suppress a decrease in cooling efficiency of the radiator due to adhesion of dust, and it is possible to suppress the work vehicle from reaching a stop of operation. Further, since the oil cooler, the 1 st rotating blade, and the radiator are arranged in this order from the outside air introduction side to the inside, the oil cooler is positioned at the outermost position, and therefore, even when, for example, the rotating blade for the oil cooler is not separately provided, maintenance of the oil cooler (for example, removal of dust and the like by manual work) can be easily performed.

However, in the cooling device provided with the rotary blade for the radiator, it is preferable to bring the rotary blade close to the radiator from the viewpoint of increasing the negative pressure and from the viewpoint of achieving a reduction in the size of the direction in which the outside air is introduced. However, when the rotary blades are brought close to the radiator, if the rotary blades are inclined, the radiator is damaged by contact with the rotary blades, and in the worst case, it is assumed that engine cooling water leaks.

Therefore, in the cooling device for a work vehicle described above, it is preferable that: a shield member that overlaps with a radial tip of the 1 st rotary blade when viewed from an introduction direction of outside air is provided between the heat sink and the 1 st rotary blade.

In general, when the 1 st rotary blade is inclined, the more the first rotary blade is located on the radial tip side, the more easily the first rotary blade comes into contact with the heat sink. In this regard, in this configuration, since the shield member overlaps the radial tip portion of the 1 st rotating blade when viewed from the direction of introduction of the outside air, even if the 1 st rotating blade is inclined, the 1 st rotating blade comes into contact with the shield member, and therefore, contact between the 1 st rotating blade and the heat sink can be suppressed. Therefore, the 1 st rotary blade can be brought close to the heat sink while preventing the heat sink from being damaged, whereby the negative pressure can be increased to remove dust, and the cooling device can be further downsized.

As examples of the shield member and the 1 st rotating blade, it is preferable that: the 1 st rotating blade and the shield member are arranged so as to at least partially overlap each other when viewed from a direction orthogonal to an introduction direction of the outside air, and at least a part of the tip portion is cut so as not to overlap the shield member when viewed from a direction orthogonal to the introduction direction of the outside air.

According to this configuration, for example, by arranging a portion other than the radial tip portion of the 1 st rotary blade (a portion that does not overlap the shield member when viewed from the direction in which the outside air is introduced) so as to overlap the shield member when viewed from a direction orthogonal to the direction in which the outside air is introduced, the 1 st rotary blade can be brought close to the heat sink. Even when the 1 st rotary blade is brought close to the heat sink, interference between the shield member and the 1 st rotary blade can be suppressed by cutting at least a part of the radial tip portion of the 1 st rotary blade (a portion overlapping the shield member when viewed from the direction of introduction of the outside air) so as not to overlap the shield member when viewed from the direction orthogonal to the direction of introduction of the outside air.

Further, as another example of the shield member and the 1 st rotary blade, it is preferable that: the 1 st rotating blade and the guard member are arranged so as to at least partially overlap each other when viewed from a direction orthogonal to an introduction direction of the outside air, and at least a part of the tip portion is formed at a position shifted from the guard member toward the outside air introduction side via a stepped portion.

According to this configuration, even if the 1 st rotary blade is brought close to the heat sink, at least a part of the radial tip portion (a portion overlapping the shield member when viewed from the direction of introduction of the outside air) of the 1 st rotary blade is offset from the shield member to the outside air introduction side via the stepped portion, and therefore interference between the shield member and the 1 st rotary blade can be suppressed.

In the cooling device for a work vehicle, it is preferable that: the oil cooler is supported by an oil cooler support frame that rotates so as to be open to the outside air introduction side with respect to a radiator frame connected to the radiator.

According to this configuration, the oil cooler can be removed from the front of the radiator by a simple operation of rotating the oil cooler support bracket with respect to the radiator holder toward the outside air introduction side, and thus, the maintenance of the radiator can be easily performed.

When such an oil cooler support frame is provided, it is preferable that: the 1 st rotating blade is supported by the oil cooler support frame.

According to this configuration, the oil cooler and the 1 st rotary blade can be removed from the front of the radiator by a simple operation of rotating the oil cooler support frame with respect to the radiator holder toward the outside air introduction side, and thereby the maintenance of the radiator can be further easily performed.

Further, in the cooling device for a work vehicle described above, it is preferable that: the oil cooler further includes a 2 nd rotating blade, and the 2 nd rotating blade is provided to overlap with an external air introduction side of the oil cooler.

According to this configuration, it is possible to reduce the size of the cooling device, and it is possible to suppress a reduction in the cooling efficiency of the oil cooler as well as a reduction in the cooling efficiency of the radiator.

In the cooling device for a work vehicle, it is preferable that: the turbocharger is further provided with an intercooler that cools air supercharged by the turbocharger, the intercooler being located at a position that does not overlap with the oil cooler when viewed from an intake direction of outside air, and being arranged in line from the outside air intake side to the inside in the order of the intercooler, the 1 st rotating blade, and the radiator so that at least a part of the intercooler overlaps with the radiator and the 1 st rotating blade.

With this configuration, even when the 3 rd cooler (intercooler) is provided, the entire cooling device can be downsized.

As described above, according to the cooling device for a work vehicle of the present invention, it is possible to achieve downsizing and suppress a decrease in cooling efficiency.

Drawings

Fig. 1 is a perspective view schematically showing a combine harvester according to embodiment 1 of the present invention.

Fig. 2 is a diagram schematically illustrating an outline of a cooling device of the combine harvester.

Fig. 3 is a diagram schematically illustrating a method of removing dust using a rotary blade.

Fig. 4 is an exploded perspective view schematically showing the cooling device.

Fig. 5 is a front view schematically showing the cooling device.

Fig. 6 is a perspective view schematically showing an oil cooler support frame as viewed from the engine side.

Fig. 7 is a perspective view schematically showing a radiator holder in which an oil cooler support bracket is assembled, as viewed from the engine side.

Fig. 8 is a sectional view schematically showing the cooling device.

Fig. 9 is a perspective view schematically showing a state where the engine room cover is opened.

Fig. 10 is a perspective view schematically showing a state where the oil cooler support bracket is rotated to the opening side.

Fig. 11 is a front view schematically showing a cooling device of a combine harvester according to embodiment 2 of the present invention.

Fig. 12 is an exploded perspective view schematically showing the cooling device.

Fig. 13 is a front view schematically showing a radiator frame.

Fig. 14 is a perspective view schematically showing a state where an engine room cover is opened.

Fig. 15 is a perspective view schematically showing a state where the oil cooler support frame and the intercooler are rotated to the opening side.

Fig. 16 is an enlarged view schematically showing the relationship between the 1 st rotating blade and the radiator frame.

Detailed Description

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In addition, although the following description is given of the case where the present invention is applied to a combine harvester, the present invention is not limited to this, and may be applied to other work vehicles such as agricultural vehicles and construction vehicles. In the drawings, arrow Fr indicates the front side in the front-rear direction of the body, arrow Rr indicates the rear side in the front-rear direction of the body, arrow Rh indicates the right side in the width direction of the body, arrow Lf indicates the left side in the width direction of the body, arrow Up indicates the upper side, and arrow Dw indicates the lower side.

(embodiment mode 1)

The overall structure of the combine harvester

Fig. 1 is a perspective view schematically showing a combine harvester 1 according to the present embodiment. As shown in fig. 1, a combine 1 includes a traveling crawler 2, a harvesting device 3 for harvesting rice or wheat, a threshing device 4 for taking out grains from ears, a grain tank 5 for storing the taken-out grains, and a discharge conveyor 6 for discharging the grains in the grain tank 5, and the combine 1 is a general-type combine capable of harvesting rice or wheat while threshing, and storing and discharging the threshed grains.

An operation unit 7 is provided on the right side in the width direction of the machine body of the harvesting unit 3 in the combine harvester 1, and on the front side in the front-rear direction of the machine body of the grain tank 5. Below the operation seat 8 of the operation portion 7, an engine room R (see fig. 2) is formed in which a transverse engine 11 (see fig. 2) as a power source, a hydraulic continuously variable transmission (not shown) that rotates using a hydraulic motor, and the like are disposed. Power from the lateral engine 11 (hereinafter, also simply referred to as the engine 11) is transmitted to the crawler belt 2 via a hydraulic continuously variable transmission or a power transmission mechanism (not shown).

Cooling device of a combine harvester

Fig. 2 is a diagram schematically illustrating an outline of the cooling device 10 of the combine harvester 1. The cooling device 10 of the combine harvester 1 is configured to cool a refrigerant that cools a drive system (the engine 11, the hydraulic continuously variable transmission, and the like) by heat exchange with outside air using the cooler C. Specifically, when the cooling fan 12 is rotated by using the engine 11 as a drive source, outside air is drawn into the engine room R from the right side of the combine harvester 1 through an opening formed in the engine room cover 9 as indicated by a black arrow in fig. 2. At this time, relatively large foreign matters contained in the sucked outside air (cooling wind) are captured by the mesh 9a provided to the engine room cover 9. The cooling air passes through the engine 11 after exchanging heat with the cooler C, and is discharged from the inside of the engine room R to the left side of the combine harvester 1 as shown by the hollow arrow in fig. 2. As described above, in the combine harvester 1 of the present embodiment, the refrigerant in the cooler C is cooled by heat exchange with the outside air introduced in the machine body width direction, which is the direction in which the outside air is introduced, thereby suppressing overheating of the drive system and the like.

However, since the combine harvester 1 is used in an environment where dust such as dust (dirt) scattered during harvesting by the harvesting device 3 is likely to fly, fine dust that is difficult to be captured by the net 9a adheres to the cooler C during heat exchange with outside air and accumulates thereon, which may reduce cooling efficiency and overheat the engine 11. Therefore, in the cooling device 10 of the present embodiment, as shown in fig. 2, the rotary blades F that rotate (rotate) by the cooling air are provided so as to overlap the outside air intake side (the right side in the machine width direction in the present embodiment) of the cooler C, and the dust adhering to the cooler C is removed using the negative pressure generated by the rotation of the rotary blades F.

Fig. 3 is a diagram schematically illustrating a method of removing dust D using the rotary blade F. Since the bent portions Fa and Fb having different bending angles are formed above and below the rotary blade F, when the rotary blade F rotates, a negative pressure region a indicated by dot hatching in fig. 3 is generated, the dust D adhering to the cooler C floats up by the action of negative pressure (backward flow), and the floating dust D flows to the left in the machine width direction by the cooling air (forward flow) and is removed from the cooler C. By performing such an operation continuously over the entire circumference of the rotation locus of the rotary blade F, the dust D attached to the cooler C can be removed.

As described above, in the present embodiment, the rotary blades F are provided for each of the plurality of coolers C that cool the plurality of refrigerants that cool the drive system by heat exchange with the outside air. Specifically, as shown in fig. 4, the cooling device 10 includes, in addition to the cooling fan 12: a radiator (1 st cooler) 20 as a cooler C, a radiator holder 21, an upper oil cooler 30 and a lower oil cooler 40 as coolers C, an oil cooler support frame 31, and a 1 st turning vane 50 and a 2 nd turning vane 60 as turning vanes F.

The radiator 20 is disposed on the right side (outside air introduction side) in the machine body width direction of the cooling fan 12, and cools the engine cooling water flowing therein by heat exchange with the cooling air generated by the cooling fan 12.

Fig. 5 is a front view schematically showing the cooling device 10. In fig. 5, the radiator 20 is not shown. As shown in fig. 4 and 5, the radiator frame 21 is formed in a substantially rectangular shape, and includes: 2 side frame members 21b, 21c arranged in the front-rear direction of the body and extending in the up-down direction, respectively; and an upper frame member 21a and a lower frame member 21d extending in the front-rear direction of the body and connecting upper and lower ends of the side frame members 21b and 21c, respectively. Two ends of the upper surface of the upper frame member 21a in the front-rear direction of the machine body are provided with 2 engaged blocks 23. Further, in the radiator frame 21, a support member 22 for supporting a bracket 74 to which a shield member 70 described later is attached is provided in the front-rear direction of the machine body so as to be bridged between 2 side frame members 21b and 21 c. As shown in fig. 4, the radiator holder 21 configured as described above is disposed on the right side of the radiator 20 in the machine width direction, and is connected to the radiator 20 along the peripheral edge portion of the substantially rectangular radiator 20.

The upper oil cooler 30 is disposed on the right side in the machine width direction of the radiator 20, and cools the hydraulic oil of the hydraulic transmission flowing inside thereof by heat exchange with the cooling air generated by the cooling fan 12. On the other hand, the lower oil cooler 40 is disposed on the right side in the machine width direction of the radiator 20 and below the upper oil cooler 30, and cools the hydraulic fluid such as a hydraulic cylinder (not shown) flowing inside thereof by heat exchange with the cooling air generated by the cooling fan 12.

As shown in fig. 4 and 5, the oil cooler support frame 31 is formed in a substantially rectangular shape, and includes: 2 side frame members 31b and 31c arranged in the front-rear direction of the body and extending in the up-down direction, respectively; and an upper frame member 31a and a rotating shaft 31d extending in the front-rear direction of the body and connecting the upper end and the lower end of the side frame members 31b and 31c, respectively. The upper oil cooler 30 is screwed to 2 mounting portions 32 provided in the upper frame member 31a and extending downward, and is supported by the oil cooler support frame 31. On the other hand, the lower oil cooler 40 is screwed to the support member 33 provided along the front-rear direction of the machine body and extending over 2 side frame members 31b and 31c, and is supported by the oil cooler support frame 31.

The oil cooler support bracket 31 is formed to be one turn smaller than the radiator holder 21 and is fitted inside the radiator holder 21. More specifically, the outer dimensions of the 2 side frame members 31b and 31c are set to be slightly smaller than the inner dimensions of the 2 side frame members 21b and 21c, and the upper end of the upper frame member 31a is set to be slightly lower than the lower end of the upper frame member 21 a.

Fig. 6 is a perspective view schematically showing the oil cooler support bracket 31 as viewed from the engine 11 side, and fig. 7 is a perspective view schematically showing the radiator holder 21 to which the oil cooler support bracket 31 is assembled as viewed from the engine 11 side. The oil cooler support frame 31 includes a pair of plate members 34 opposed to each other in the front-rear direction of the body and each having a through hole 34 a. The pair of plate members 34 are assembled to the oil cooler support frame 31 in a state where the rotating shaft 31d is rotatably inserted into the through hole 34 a. On the other hand, as shown in fig. 5 and 7, in the radiator frame 21, a support bracket 24 is attached to the center portion in the front-rear direction of the machine body of the lower frame member 21 d. By fixing the pair of plate members 34 to the support bracket 24 in this manner, the oil cooler support frame 31 is supported by the radiator frame 21 so as to be rotatable about the rotation shaft 31 d. Thus, the oil cooler support bracket 31 is fitted inside the radiator holder 21 and can rotate so as to open to the right side in the machine body width direction (the outer side in the machine body width direction) with respect to the radiator holder 21 with the lower end portion as a fulcrum.

Further, an engaging member 35 having a cross-sectional shape of "コ" which is open to the left side in the machine width direction when viewed from the front-rear direction of the machine is provided on the upper side of the upper frame member 31a of the oil cooler support frame 31. When the oil cooler support bracket 31 is fitted into the radiator holder 21 in this manner, the upper frame member 21a of the radiator holder 21 and the engaged block 23 are fitted into the engaging member 35, and the engaging member 35 engages with the engaged block 23. The locking member 35 is fixed to the engaged block 23 by a butterfly bolt (not shown) or the like, and if the butterfly bolt is removed, the fixing to the engaged block 23 is released, and the oil cooler support frame 31 can be rotated.

Fig. 8 is a sectional view schematically showing the cooling device 10. In fig. 8, hatching lines indicating cross sections are omitted for easy viewing of the drawing. As shown in fig. 8, the oil cooler support frame 31 is provided with an upper support plate 36, and the upper support plate 36 is sandwiched between the upper frame member 31a and the locking member 35 and extends to the right in the machine width direction from the center portion of the upper frame member 31a in the machine front-rear direction. Further, the oil cooler support frame 31 is provided with a lower support plate 37 having an L-shaped cross section, and the lower support plate 37 includes: a mounting portion 37a mounted to the center portion of the rotating shaft 31d in the front-rear direction of the machine body, and a support portion 37b extending from the upper end portion of the mounting portion 37a to the right side in the width direction of the machine body. The support portions 37b of the upper support plate 36 and the lower support plate 37 face each other in the vertical direction.

The 1 st rotating blade 50 is supported by the oil cooler support frame 31 via a 1 st strut 51 and the like. More specifically, as shown in fig. 8, an upper bracket 52 having an L shape is screwed to the left end portion in the machine width direction of the lower surface of the upper support plate 36, and a lower bracket 53 having an L shape is screwed to the left end portion in the machine width direction of the upper surface of the support portion 37b of the lower support plate 37. The upper end of the 1 st strut 51 is fixed to the upper bracket 52 by welding or the like, and the lower end of the 1 st strut 51 is fixed to the lower bracket 53 by welding or the like, and the 1 st strut 51 extends in the vertical direction at the center in the longitudinal direction of the machine body of the oil cooler support frame 31 and on the left side in the machine body width direction of the upper oil cooler 30 and the lower oil cooler 40. A bearing mechanism 54 for rotatably supporting the rotation shaft of the 1 st rotating blade 50 is provided at the vertically central portion of the 1 st support column 51.

In this way, when the 1 st rotary blade 50 is supported by the oil cooler support frame 31 and the oil cooler support frame 31 is fitted inside the radiator holder 21, the 1 st rotary blade 50 is arranged so as to overlap the outside air introduction side (the right side in the machine body width direction) of the radiator 20. In this way, the 1 st rotary vane 50 is rotated by the cooling air flowing to the left side in the machine width direction through the upper oil cooler 30 and the lower oil cooler 40 to generate negative pressure, thereby removing dust adhering to the radiator 20.

On the other hand, the 2 nd rotating blade 60 is supported by the oil cooler support frame 31 via the 2 nd strut 61 and the like. More specifically, as shown in fig. 8, an upper bracket 62 of the 2 nd support column 61 is screwed to the end portion on the right side in the machine body width direction of the lower surface of the upper support plate 36, and a lower bracket 63 of the 2 nd support column 61 is screwed to the end portion on the right side in the machine body width direction of the upper surface of the support portion 37b of the lower support plate 37. Thus, the 2 nd strut 61 extends in the vertical direction at the center in the longitudinal direction of the machine body of the oil cooler support frame 31 and at the right side in the width direction of the machine body of the upper oil cooler 30 and the lower oil cooler 40. A bearing mechanism 64 for rotatably supporting the rotation shaft of the 2 nd rotating blade 60 is provided at the center portion in the vertical direction of the 2 nd support column 61.

In this way, the 2 nd rotating blade 60 is supported by the oil cooler support frame 31, and the 2 nd rotating blade 60 is arranged so as to overlap with the outside air introduction side (the right side in the machine width direction) of the upper oil cooler 30 and the lower oil cooler 40. In this way, the 2 nd rotating blade 60 is rotated by the cooling air flowing to the left side in the machine body width direction to generate negative pressure, thereby removing dust adhering to the upper oil cooler 30 and the lower oil cooler 40.

In the cooling device 10 of the present embodiment configured as described above, as shown in fig. 4 to 8, the 2 nd rotating blade 60, the upper oil cooler 30, the lower oil cooler 40, the 1 st rotating blade 50, and the radiator 20 are arranged in this order from the right side (outer side) to the left side (inner side) in the body width direction so as to overlap when viewed from the body width direction. More specifically, the rotation axis of the 2 nd rotary vane 60, the center in the longitudinal direction of the machine body of the upper cooler 30 and the lower oil cooler 40, the rotation axis of the 1 st rotary vane 50, and the center in the longitudinal direction of the machine body of the radiator 20 are aligned in a straight line when viewed from the machine body width direction.

In this way, since the radiator 20 and the upper oil cooler 30 and the lower oil cooler 40 are arranged in the machine body width direction so as to overlap each other when viewed from the machine body width direction, the cooling device 10 can be prevented from being enlarged as compared with a case where they are arranged in parallel in a plane orthogonal to the machine body width direction (hereinafter, for convenience, also referred to as "parallel arrangement").

Here, when the radiator 20 and the upper oil cooler 30 and the lower oil cooler 40 are arranged in the body width direction, the width itself of the cooling device 10 is larger than when they are arranged in parallel. However, as shown in fig. 4 and the like, since the dimension of the radiator 20 and the upper oil cooler 30 and the lower oil cooler 40 in the direction orthogonal to the machine body width direction is significantly larger than the dimension in the machine body width direction, the engine room R may be enlarged more than necessary when the radiator 20 and the upper oil cooler 30 and the lower oil cooler 40 are arranged in parallel. In this regard, in the present embodiment in which the radiator 20 and the upper oil cooler 30 and the lower oil cooler 40 are arranged to overlap each other when viewed from the body width direction, the entire cooling device 10 can be reduced in size as compared with the case where these are arranged in parallel.

In the cooling device 10 of the present embodiment, since the 1 st rotating blade 50 is provided so as to overlap the outside air introduction side of the radiator 20 and the 2 nd rotating blade 60 is provided so as to overlap the outside air introduction sides of the upper oil cooler 30 and the lower oil cooler 40, it is possible to reduce the size of the cooling device 10 and to suppress not only a decrease in the cooling efficiency of the radiator 20 but also a decrease in the cooling efficiency of the upper oil cooler 30 and the lower oil cooler 40.

Fig. 9 is a perspective view schematically showing a state in which the engine room cover 9 is opened, and fig. 10 is a perspective view schematically showing a state in which the oil cooler support frame 31 is rotated to the opening side. The cooling device 10 is disposed on the right side in the machine width direction of the engine room R provided below the operating portion 7, and when the engine room cover 9 is opened, the 2 nd rotating blades 60 and the upper oil cooler 30 and the lower oil cooler 40 are exposed to the front as shown in fig. 9. This makes it possible to easily perform maintenance of the 2 nd rotating blade 60 and the upper oil cooler 30 and the lower oil cooler 40.

Further, the radiator 20 is exposed to the front as shown in fig. 10 by a simple operation of rotating the oil cooler support frame 31 to the outside in the machine body width direction, and therefore, maintenance of the radiator 20 can be easily performed. Further, since the oil hose 30a of the upper oil cooler 30 and the oil hose 40a of the lower oil cooler 40 have flexibility, when the oil cooler support frame 31 is rotated outward in the machine width direction, the oil hoses 30a and 40a are bent in the vicinity of the rotating shaft 31d, and therefore the oil cooler support frame 31 can be smoothly opened.

However, in the cooling device 10, from the viewpoint of increasing the negative pressure and from the viewpoint of achieving a reduction in the size of the machine body in the width direction, it is desirable to bring the 1 st rotating blade 50 as close to the radiator 20 as possible and to bring the 2 nd rotating blade 60 as close to the upper oil cooler 30 and the lower oil cooler 40 as possible. However, unlike the state of the 2 nd rotary blade 60, the upper oil cooler 30, and the lower oil cooler 40, which can be easily confirmed by opening the engine compartment cover 9, the state of the radiator 20 and the inclination of the 1 st rotary blade 50 cannot be confirmed by opening only the engine compartment cover 9, and in the worst case, if the radiator 20 is damaged by the inclination of the 1 st rotary blade 50, it is assumed that the engine cooling water leaks out.

Therefore, in the cooling device 10 of the present embodiment, the annular shield member 70 that overlaps the radial tip portion 50a of the 1 st rotary blade 50 when viewed from the body width direction is provided between the radiator 20 and the 1 st rotary blade 50. More specifically, as shown in fig. 7, the radiator holder 21 is provided with a bracket 71 extending downward from the center in the longitudinal direction of the body of the upper frame member 21a, brackets 72 and 73 extending in the longitudinal direction of the body from the center in the vertical direction of the 2 side frame members 21b and 21c, and a bracket 74 extending upward from the center in the longitudinal direction of the body of the support member 22. The annular shield member 70 is fixed to the 4 brackets 71, 72, 73, and 74 by welding or the like so that the center thereof coincides with the rotation axis of the 1 st rotating blade 50 when viewed from the width direction of the body.

As shown in fig. 7, the radial tip 50a of the 1 st rotating blade 50 overlaps the annular shielding member 70 when viewed from the machine width direction. As shown by the broken lines in fig. 8, the bent portions 50b and 50c of the 1 st rotor blade 50 are inserted into the annular protector member 70, and thus the 1 st rotor blade 50 and the protector member 70 are arranged so as to partially overlap when viewed from a direction orthogonal to the machine width direction. However, as shown by the broken lines in fig. 7 and 8, the bent portions 50b and 50c of the tip portion 50a of the 1 st rotating blade 50 are cut so as not to overlap the guard member 70 when viewed from a direction orthogonal to the machine width direction. Further, the clearance between the tip portion 50a of the 1 st rotary blade 50 and the shield member 70 is set smaller than the clearance between the 1 st rotary blade 50 and the heat sink 20.

By providing such a shield member 70, even if the 1 st rotary blade 50 is inclined, the tip portion 50a of the 1 st rotary blade 50 abuts against the shield member 70 before the 1 st rotary blade 50 contacts with the heat sink 20, and therefore, the contact between the 1 st rotary blade 50 and the heat sink 20 can be suppressed. Further, when the bent portions 50b and 50c of the 1 st rotary blade 50 are overlapped with the shield member 70 when viewed from the direction orthogonal to the machine body width direction, the 1 st rotary blade 50 can be brought as close to the heat sink 20 as possible. Further, by cutting the bent portions 50b and 50c of the leading end portion 50a of the 1 st rotary blade 50 so as not to overlap the protector member 70 when viewed from the direction orthogonal to the machine width direction, interference between the protector member 70 and the 1 st rotary blade 50 can be suppressed. Therefore, the 1 st rotary blade 50 can be brought as close to the radiator 20 as possible while preventing the radiator 20 from being damaged, whereby the negative pressure can be increased to remove dust, and further downsizing of the cooling device 10 can be achieved.

(embodiment mode 2)

The present embodiment differs from embodiment 1 described above in that it includes an intercooler, and in that the shape of the 1 st rotating blade and the like. The following description focuses on differences from embodiment 1, while avoiding redundant description of the same configuration as embodiment 1.

Fig. 11 is a front view schematically showing the cooling device 110 of the combine harvester 1 according to the present embodiment, and fig. 12 is an exploded perspective view schematically showing the cooling device 110. As shown in fig. 11 and 12, cooling device 110 includes, in addition to cooling fan 12, a radiator (1 st cooler) 120, a radiator holder 121, an upper oil cooler 140, a lower oil cooler (2 nd cooler) 130, an oil cooler holder 131, an intercooler 80, a 1 st rotating blade 150, a 2 nd rotating blade 160, and a 3 rd rotating blade 90.

Fig. 13 is a front view schematically showing the radiator support 121. As shown in fig. 13, the radiator holder 121 is formed in a substantially rectangular shape, and includes: 2 side frame members 121b and 121c arranged in the front-rear direction of the body and extending in the vertical direction, respectively; and an upper frame member 121a and a lower frame member 121d extending in the front-rear direction of the body and connecting upper and lower ends of the side frame members 121b and 121c, respectively.

As shown in fig. 11 and 12, the oil cooler support frame 131 is formed in a substantially rectangular shape, and includes: 2 side frame members 131b and 131c arranged in the front-rear direction of the body and extending in the vertical direction, respectively; and an upper frame member 131a and a rotating shaft 131d extending in the front-rear direction of the body and connecting upper and lower ends of the side frame members 131b and 131c, respectively. The oil cooler support bracket 131 is rotatably supported via a rotation shaft 131d at substantially the front half of the radiator frame 121 in the front-rear direction of the machine body. Thereby, the oil cooler support bracket 131 can be rotated so as to be opened to the right side (outer side) in the machine body width direction with respect to the radiator holder 121 with the lower end portion as a fulcrum.

In the present embodiment, the upper and lower relationship of the 2 oil coolers is contrary to embodiment 1, and the lower oil cooler 130 cools the hydraulic oil of the hydraulic transmission, while the upper oil cooler 140 cools the hydraulic oil of the hydraulic cylinder or the like. The lower oil cooler 130 is screwed to the 2 side frame members 131b and 131c, and supported by the oil cooler support frame 131. On the other hand, the upper oil cooler 140 is screwed to the upper frame member 131a and supported by the oil cooler support frame 131.

The intercooler 80 cools the air supercharged by the turbocharger, and is rotatably supported at a substantially rear half portion in the front-rear direction of the machine body of the radiator frame 121 via a rotary shaft (not shown) provided at an upper end portion thereof. Thereby, the intercooler 80 can be rotated so as to be opened to the right side (outer side) in the machine body width direction with respect to the radiator support 121 with the upper end portion as a fulcrum. Further, at the lower end portion of the intercooler 80, a lateral support member 81 and a longitudinal support member 82 are provided, the lateral support member 81 extending rearward in the front-rear direction of the machine body from the intercooler 80, the rear end portion thereof being fixed to the side frame member 121c of the radiator frame 121 by a butterfly bolt, the longitudinal support member 82 extending downward from the intercooler 80, the lower end portion thereof being fixed to the lower frame member 121d of the radiator frame 121 by a butterfly bolt. The horizontal support members 81 and the vertical support members 82 support the intercooler 80 to the radiator holder 121, and when the butterfly bolts are removed and the intercooler 80 is rotated, the horizontal support members 81 and the vertical support members 82 function as holding rods for lifting the intercooler 80.

The 1 st rotary blade 150 is supported by the radiator frame 121 via the 1 st support column 151 and the like. In more detail, as shown in fig. 12, the upper support column 152 of the 1 st support column 151 is screwed to the upper frame member 121a of the radiator frame 121, and the lower support column 153 of the 1 st support column 151 is screwed to the lower frame member 121 d. Thus, as shown in fig. 13, the 1 st support column 151 extends in the vertical direction on the right side in the body width direction of the heat sink 120. A shaft support 154 that supports the rotation shaft 155 is provided at the center in the vertical direction of the 1 st support column 151. The 1 st rotary blade 150 is provided with a bearing mechanism 156 rotatably attached to the rotary shaft 155. In this way, the 1 st rotary blade 150 is supported by the radiator frame 121, and the 1 st rotary blade 150 is arranged to overlap the outside air intake side (the right side in the machine width direction) of the radiator 120 in the present embodiment.

On the other hand, the 2 nd rotating blade 160 is supported by the oil cooler support bracket 131 via a bracket 161 or the like. More specifically, as shown in fig. 11, 4 brackets 161 are provided in an X-shape so as to be bridged between 2 side frame members 131b and 131c of the oil cooler support frame 131. A shaft plate 162 for supporting a rotation shaft is provided at an intersection (center portion) of the 4 brackets 161. The 2 nd rotating blade 160 is provided with a bearing mechanism 163 rotatably attached to the rotating shaft. In this way, by supporting the 2 nd rotating blade 160 by the oil cooler support bracket 131, the 2 nd rotating blade 160 is arranged to overlap the outside air intake side (the right side in the machine width direction) of the upper oil cooler 140 and the lower oil cooler 130 in the present embodiment.

Further, the oil hose 140a of the upper oil cooler 140 is fixed to the 4 brackets 161 by repeated winding or the like. Thus, the oil hose 140a does not extend straight downward from the upper oil cooler 140 but extends along the side frame members 131b and 131c, and therefore, the loss of the cooling air caused by the cooling air colliding with the oil hose 140a is reduced.

The 3 rd rotary blade 90 is supported by the intercooler 80 itself via a 3 rd support 91 and the like. More specifically, as shown in fig. 11 and 12, a 3 rd support column 91 extending in the vertical direction is attached to the intercooler 80 via a support bracket 83 or the like, and a rotating shaft 92 is provided at the center in the vertical direction of the 3 rd support column 91. The 3 rd rotary vane 90 is provided with a bearing mechanism 93 rotatably attached to the rotary shaft 92. In this way, by supporting the 3 rd rotating blade 90 by the intercooler 80 itself, the 3 rd rotating blade 90 is arranged to overlap with the outside air introduction side (the right side in the machine body width direction) of the intercooler 80.

In the cooling device 110 of the present embodiment configured as described above, as shown in fig. 11 and 12, the 2 nd rotating blade 160, the upper oil cooler 140, the lower oil cooler 130, the 1 st rotating blade 150, and the radiator 120 are arranged in this order from the right side to the left side in the body width direction so as to overlap when viewed from the body width direction. In addition, the intercooler 80 is also positioned so as not to overlap the upper oil cooler 140 and the lower oil cooler 130 when viewed from the body width direction, and the intercooler 80, the 1 st rotating blade 150, and the radiator 120 are arranged in this order from the body width direction to the right side to the left side so as to overlap the 1 st rotating blade 150 and the radiator 120.

Thus, even when the 3 rd cooler (intercooler 80) is provided, the entire cooling device 110 can be downsized. In this way, in cooling device 110 of the present embodiment, since 3 rd rotary vane 90 is provided so as to overlap with the outside air intake side of intercooler 80, it is possible to reduce the size of cooling device 110, and it is possible to suppress not only a decrease in the cooling efficiency of radiator 120, upper oil cooler 140, and lower oil cooler 130, but also a decrease in the cooling efficiency of intercooler 80.

Fig. 14 is a perspective view schematically showing a state in which the engine room cover 9 is opened, and fig. 15 is a perspective view schematically showing a state in which the oil cooler support frame 131 and the intercooler 80 are rotated to an open side. As shown in fig. 14, when the engine room cover 9 is opened, the 2 nd rotating blade 160, the upper oil cooler 140, the lower oil cooler 130, the 3 rd rotating blade 90, and the intercooler 80 are exposed in the front, and therefore, maintenance thereof can be easily performed.

Further, by a simple operation of rotating the oil cooler support bracket 131 and the intercooler 80 outward in the machine body width direction, the 1 st rotary blade 150 and the radiator 120 are exposed forward as shown in fig. 15, and therefore maintenance of the 1 st rotary blade 150 and the radiator 120 can be easily performed. Further, in the same manner as in embodiment 1, in the case where the 1 st rotary blade 150 is supported by the oil cooler support bracket 131, even in the case where it is desired to rotate only the oil cooler support bracket 131, it is necessary to rotate the intercooler 80 outward in the machine body width direction in order to avoid interference between the 1 st rotary blade 150 and the intercooler 80, but in this embodiment, such a problem can be avoided by supporting the 1 st rotary blade 150 by the radiator holder 121.

Fig. 16 is an enlarged view schematically showing the relationship between the 1 st rotating blade 150 and the radiator frame 121. In the cooling device 110 of the present embodiment, as shown in fig. 13 and 16, when viewed from the width direction of the machine body, the radial tip portion 150a of the 1 st rotating blade 150 overlaps the radiator frame 121, and therefore the radiator frame 121 constitutes a part of the shield member. However, since the radial tip portion 150a of the 1 st rotary blade 150 and the radiator frame 121 are intermittently overlapped only at 90 ° intervals, 4 shield fins (shield members) 170 are attached to the radiator frame 121 so as to draw an arc together with the radiator frame 121 in order to compensate for this problem.

As shown in fig. 13, when viewed from the body width direction, the radial tip portion 150a of the 1 st rotating blade 150 overlaps with the arc drawn by the radiator frame 121 and the protective fin 170. As shown in fig. 16, when viewed from a direction orthogonal to the machine body width direction, the bent portion 150b of the 1 st rotary blade 150 is disposed so as to partially overlap the radiator frame 121 and the guard fin 170. The tip 150a of the 1 st rotary blade 150 is formed at a position shifted outward in the machine width direction from the radiator holder 121 and the protective fin 170 via the stepped portion 150d.

As shown in fig. 16, when the gap between the tip portion 150a of the 1 st rotary blade 150 and the radiator frame 121 and the guard fins 170 is a and the gap between the 1 st rotary blade 150 and the radiator 120 is B, in the present embodiment, a < B is set.

According to such a configuration, even if the 1 st rotary blade 150 is inclined, since a < B is set, the tip portion 150a of the 1 st rotary blade 150 abuts against the radiator frame 121 or the shield fin 170 before the 1 st rotary blade 150 contacts the radiator 120, and therefore, the contact between the 1 st rotary blade 150 and the radiator 120 can be suppressed. Further, when viewed from a direction orthogonal to the width direction of the housing, the 1 st rotary blade 150 can be placed on the radiator holder 121 and the protective fin 170 so that the 1 st rotary blade 150 can be as close to the radiator 120 as possible. Further, since the tip portion 150a of the 1 st rotary blade 150 is offset outward in the machine width direction from the radiator holder 121 and the shield fin 170 via the stepped portion 150d, interference between the radiator holder 121 and the shield fin 170 and the 1 st rotary blade 150 can be suppressed.

(other embodiments)

The present invention is not limited to the embodiments, and can be implemented in other various ways without departing from the spirit or main features thereof.

In the above embodiments, the rotary blades 50, 60, … that rotate by the cooling air are used, but the present invention is not limited to this, and for example, a rotary blade that rotates using a motor (not shown) or the engine 11 as a drive source may be used.

In each of the above embodiments, the rotary vanes 50, 60, … are provided not only to the radiators 20, 120 but also to the upper oil cooler 30, the lower oil coolers 40, … and the intercooler 80, but the present invention is not limited thereto, and for example, the rotary vanes 50, 150 may be provided only to the radiators 20, 120. In this way, in the case where the oil cooler rotary vane and the intercooler rotary vane are not separately provided, since the upper oil cooler 30, the lower oil coolers 40 and …, and the intercooler 80 are located at the outermost sides, maintenance thereof (for example, removal of dust by hand work) can be easily performed.

In each of the above embodiments, the protector member 70 and the protector fin 170 are provided only for the 1 st rotary blade 50, 150, but the present invention is not limited thereto, and for example, the protector member may be provided for the 2 nd rotary blade 60, 160 and the 3 rd rotary blade 90.

Further, in embodiment 1, the bearing mechanisms 54 and 64 are provided on the struts 51 and 61 side supporting the rotary blades 50 and 60, while in embodiment 2, the bearing mechanisms 93, 156, and 163 are provided on the rotary blades 90, 150, and 160 side, but the bearing mechanisms may be provided on either the strut side or the rotary blade side.

While the 1 st rotary blade 50 is notched in embodiment 1, the step portion 150d is provided in the 1 st rotary blade 150 in embodiment 2, any configuration may be adopted as long as interference with the shield member 70 and the shield fins 170 can be avoided.

In the above embodiments, the oil cooler support frames 31 and 131 and the intercooler 80 are rotated about the rotation shafts 31d and 131d extending in the front-rear direction of the machine body, but the present invention is not limited thereto, and the oil cooler support frames 31 and 131 and the intercooler 80 may be rotated about the rotation shafts extending in the vertical direction, for example.

Thus, the above-described embodiments are merely illustrative in all aspects and are not to be construed restrictively. Further, any modification or change within the equivalent range falling within the scope of claims falls within the scope of the present invention.

Industrial applicability

According to the present invention, it is possible to achieve downsizing and suppress a decrease in cooling efficiency, and therefore, it is extremely advantageous to apply the present invention to a cooling device for a combine harvester.

Description of the reference numerals

A combine harvester; 10. a cooling device; an engine (drive system); 20. a heat sink (1 st cooler); 21. 121.. a heat sink stand; an upper side oil cooler (2 nd cooler); 31. an oil cooler support; 50. 1 st rotating blade; a front end portion; 60. 2 nd rotating blade; a shield member; 80.. an intercooler; a lower side oil cooler (2 nd cooler); a step portion; protective flaps (protective members).

Claims (9)

1. A cooling device for a working vehicle, comprising a 1 st cooler and a 2 nd cooler, wherein the 1 st cooler and the 2 nd cooler respectively cool a plurality of refrigerants for cooling a driving system through heat exchange with outside air introduced from the outside of a machine body,

   the cooling apparatus for a work vehicle is characterized in that,

   further comprising a 1 st rotary blade, wherein the 1 st rotary blade is arranged to overlap with the external air introduction side of the 1 st cooler,

   the 2 nd cooler is arranged in line with the 1 st cooler and the 1 st rotating blade in the direction of introduction of the external air such that at least a part of the 2 nd cooler overlaps the 1 st cooler and the 1 st rotating blade when viewed from the direction of introduction of the external air.
2. The cooling apparatus for a work vehicle according to claim 1,

   the 1 st cooler is a radiator that cools engine cooling water, the 2 nd cooler is an oil cooler that cools hydraulic oil of the hydraulic transmission,

   the oil cooler, the 1 st rotating blade, and the radiator are arranged in this order from the outside air introduction side to the inside.
3. The cooling apparatus for a work vehicle according to claim 2,

   a shield member that overlaps with a radial tip portion of the 1 st rotating blade when viewed from an introduction direction of the outside air is provided between the heat sink and the 1 st rotating blade.
4. The cooling apparatus of a work vehicle according to claim 3,

   the 1 st rotating blade and the shield member are arranged so as to overlap at least partially when viewed from a direction orthogonal to an introduction direction of outside air,

   at least a part of the distal end portion is cut so as not to overlap with the shield member when viewed from a direction orthogonal to an introduction direction of outside air.
5. The cooling apparatus for a work vehicle according to claim 3,

   the 1 st rotating blade and the shield member are arranged so as to overlap at least partially when viewed from a direction orthogonal to an introduction direction of outside air,

   at least a part of the tip portion is formed at a position offset from the shield member toward the outside air introduction side via a stepped portion.
6. The cooling apparatus for a work vehicle according to claim 2,

   the oil cooler is supported by an oil cooler support frame that rotates so as to be open to the outside air introduction side with respect to a radiator frame connected to the radiator.
7. The cooling apparatus for a work vehicle according to claim 6,

   the 1 st rotating blade is supported by the oil cooler support frame.
8. The cooling apparatus for a work vehicle according to claim 2,

   the oil cooler further includes a 2 nd rotating blade, and the 2 nd rotating blade is provided to overlap with an external air introduction side of the oil cooler.
9. The cooling apparatus of a work vehicle according to claim 2,

   further comprising an intercooler for cooling the air supercharged by the turbocharger,

   the intercooler is arranged in a row from the outside air introduction side to the inside in the order of the intercooler, the 1 st rotary blade, and the radiator, at a position not overlapping the oil cooler when viewed from the outside air introduction direction, and at least a part of the intercooler overlaps the radiator and the 1 st rotary blade.

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