JP2015084709A - Hydraulic-machine cooling device of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance cooling effects of an oil tank by an engine cooling air by lowering the centroid of the oil tank for storing hydraulic oil of a hydraulic actuator in a combine harvester and securing the volume.SOLUTION: A motor part (4) disposed on the lower side of a steering part (3) includes; an engine (E); a cooling fan (12) for introducing an outside air to the motor part (4); and a hydraulic oil cooler (18) for cooling hydraulic oil to be supplied to a hydraulic machine. The combine harvester is so configured that the cooling air by the cooling fan (12) flowing from horizontal one side to the horizontal other side to cool the engine (E) and the oil cooler (18). An oil tank (36) for storing the hydraulic oil to be supplied to the hydraulic machine is disposed at a part where the cooling air flowing out from the motor part (4) flows. The oil tank (36) is mounted on a traveling undercarriage (1) such that the lower side thereof (36) protrudes downward from the lower face of the traveling undercarriage (1) and the upper side thereof protrudes upward the upper face of the traveling undercarriage (1).

Description

  The present invention relates to a combiner hydraulic device cooling apparatus.

  In the combine, a cutting suspension base in a front-up-tilting posture is provided on the left front part of the body frame on which the hydraulically driven continuously variable transmission is mounted, and the cutting body is supported so as to be able to move up and down, and along with the cutting suspension base, the body An engine having a cooling fan is provided at the front right side of the frame, and an oil tank for storing hydraulic oil of hydraulic operating devices such as the continuously variable transmission is placed in a forward upward inclined posture along the rear part of the cutting suspension base. A valve block that integrates a plurality of control valves for hydraulically operated equipment is installed on the upper surface of the oil tank with a gap through which cooling air from the cooling fan can pass, so that it does not require any special cooling means. An oil cooling system is known (Patent Document 1).

JP 2009-165413 A

  The invention of the background art has a configuration in which a cutting suspension base is attached to a traveling body of a combine in a front rising inclination posture, and an oil tank is attached in a front rising inclination posture on the upper side of the cutting suspension base. Therefore, the oil tank is disposed so as to protrude above the traveling vehicle body, and there is a problem that the size of the airframe increases. Moreover, since the oil tank is attached to the upper side of the mowing suspension stand in a forward-tilting posture, there is a problem that the installation work is difficult.

  Accordingly, the present invention is intended to solve such problems.

  According to the first aspect of the present invention, the steering portion (3) and the driving portion (4) are disposed on the left and right sides of the traveling chassis (1), the threshing portion (6) is disposed on the left and right sides, and the front portion In the combine in which the cutting and conveying section (7) is arranged to be movable up and down, the driving section (4) disposed below the control section (3) includes an engine (E) and a driving section (4 ) A cooling fan (12) for introducing outside air into the inside, and a hydraulic oil cooler (18) for cooling the hydraulic oil supplied to the hydraulic equipment, and the cooling air from the cooling fan (12) is It is configured to flow toward the other side to cool the engine (E) and the oil cooler (18), and the hydraulic oil supplied to the hydraulic equipment is stored in a part where the cooling air flowing out from the driving part (4) flows. An oil tank (36) is disposed, and the oil tank (36) has a lower side on the running side. Protrudes from the lower surface of the chassis (1) below, and a combine, characterized in that attached to the traveling undercarriage (1) such that the upper portion protruding upward from the upper surface of the running chassis (1).

The invention according to claim 2 is the combine according to claim 1, wherein a hydraulic pressure switching valve (38) is disposed above the oil tank (36).
According to a third aspect of the present invention, in the first or second aspect, the hydraulic pressure switching valve (38) is disposed below a transmission case (40) for driving the feed chain (6a) of the threshing portion (6). It is the described combine.

  According to a fourth aspect of the present invention, a compressor (42) is disposed behind the oil tank (36) and the hydraulic pressure switching valve (38), and the upper surfaces of the hydraulic pressure switching valve (38) and the compressor (42) are substantially the same height. It is a combine as described in any one of Claims 1-3 arrange | positioned at the top.

  According to a fifth aspect of the present invention, the oil return port of the oil cooler (18), the hydraulic pump (46), and the hydraulic pressure switching valve (38) is arranged in the left-right direction at the site where the engine cooling air flows. The combine according to any one of claims 1 to 4, wherein the oil return ports are connected by a linear return low-pressure hydraulic hose (47) along the left-right direction.

  According to the first aspect of the present invention, the oil tank (36) for storing the hydraulic oil to be supplied to the hydraulic equipment is disposed at a portion where the cooling air flowing out from the driving portion (4) flows, and the oil tank (36). Is attached to the traveling chassis (1) so that its lower part projects downward from the lower surface of the traveling chassis (1) and its upper part projects upward from the upper surface of the traveling chassis (1). The oil tank (36) has a low center of gravity, and while ensuring capacity, the amount of rocking movement of the front and rear and left and right of the airframe is reduced to suppress oil foaming, and the oil tank (36) is cooled by the cooling air of the engine (E). The effect can be enhanced.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the hydraulic pressure switching valve (38) is disposed above the oil tank (36), the oil tank (36) and the hydraulic pressure switching valve are arranged. (38) can be sub-assembled and assembled to the traveling chassis (1), and assembly and maintenance operations are facilitated. Further, the piping from the hydraulic pressure switching valve (38) to the oil tank (36) can be shortened to reduce the cost.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the hydraulic pressure switching is performed below the transmission case (40) for driving the feed chain (6a) of the threshing section (6). Since the valve (38) is disposed, the oil tank (36) and the hydraulic pressure switching valve (38) are disposed by effectively using the space below the transmission case (40) of the threshing part (6), and the airframe is compact. Can be summarized.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the compressor (42) is provided behind the oil tank (36) and the hydraulic pressure switching valve (38). And the upper surfaces of the hydraulic pressure switching valve (38) and the compressor (42) are arranged at substantially the same height, so that the upper body of the hydraulic pressure switching valve (38) and the compressor (42) is simply placed above the compact body. Since it can be covered with a single small cover, the cost can be reduced.

  According to the invention described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4, the oil cooler (18), the hydraulic pump (46), and the hydraulic pressure switching valve (38) ) Oil return ports are arranged in the left and right direction at the site where the engine cooling air flows, and these oil return ports are connected by a straight return low pressure hydraulic hose (47) along the left and right direction. While the return low-pressure hydraulic hose (47) is shortened and the wiring space is made compact, the cooling effect by the cooling air of the engine can be enhanced and the durability can be enhanced.

The left view of the whole combine. The top view of the whole combine. The left view which abbreviate | omitted a part of the control part and the drive part. The front view which abbreviate | omitted one part of the control part and the drive part. The left view which abbreviate | omitted a part of combine front side part. The top view which a part of combine was abbreviate | omitted. The left view of an outside air introduction cover. The left view of an outside air introduction cover. The left view of an outside air introduction cover. The left view of an outside air introduction cover.

An embodiment specifically configured based on the technical idea will be described below with reference to the drawings.
First, the overall structure of a combine for carrying out the present invention will be described with reference to FIGS. The front side, rear side, left side, and right side are described based on the traveling direction of the aircraft.

  The left and right crawler traveling devices 2 and 2 are disposed below the traveling chassis 1 of the combine, the steering unit 3 with the driver's seat 10 is disposed at the right front part of the traveling chassis 1, and the driver's seat 10 at the rear of the steering unit 3. A driving unit 4 equipped with an engine E is disposed below, and a grain tank 5 for storing grains is disposed behind the control unit 3. A threshing section 6 is disposed on the left side of the traveling chassis 1, a cutting and conveying section 7 is provided on the entire front side of the traveling chassis 1 to be movable up and down, and a waste disposal device 8 is disposed at the rear of the traveling chassis 1. A discharge auger 9 is provided on the rear side of the Glen tank 5.

Next, specific configurations of the control unit 3 and the driving unit 4 will be described with reference to FIGS.
A driving unit 4 is provided below the rear part of the control unit 3, and the driving unit 4 is configured in a rectangular parallelepiped shape that is long in the left-right direction. The engine E is supported on the traveling chassis 1 at the bottom of the driving unit 4 via a mount, Ea is arranged along the left-right direction. The cooling fan 12 is supported on the right side of the engine E (left side in FIG. 4) so as to rotate about the left and right axis, and is transmitted from the output shaft of the engine E via the cooling fan transmission Eb. A radiator 13 is disposed on the right side (left side in FIG. 4) of the cooling fan 12, and an intercooler 17, an oil cooler 18, and an outside air introduction cover 16 with a dust removal net 16a are disposed on the right side of the radiator 13.

  When the cooling fan 12 rotates, the cooling air flows from the right side to the left side through the dust-proof net 16a of the outside air introduction cover 16, and the radiator 13, the intercooler 17, the oil cooler 18, and the engine E are cooled. Further, the later-described oil tank 36 and hydraulic pressure switching valves 38 and 38 are cooled by the cooling air flowing to the left via the engine E of the prime mover 3.

  A traveling mission case 31 is disposed in front of the driving part 4 in the front center of the traveling chassis 1, and a traveling hydraulic continuously variable transmission H is disposed above the traveling mission case 31 to transmit engine power. The traveling power that has been shifted and forward / reversely switched by the traveling hydraulic continuously variable transmission H is transmitted to the left and right crawler traveling devices 2 and 2 via a gear-type auxiliary transmission (not shown) in the traveling mission case 31.

  A cutting suspension frame 32 is erected on the rear portion of the traveling mission case 31 of the traveling chassis 1, and the rear end of the cutting conveyance unit 7 is pivotally supported around the suspension shaft in the left-right direction at the upper end of the cutting suspension frame 32. It goes up and down by hydraulic drive.

  An elevating cylinder 39 that moves up and down the traveling continuously variable transmission H, the cutting and conveying unit 7 and the like in the front part of the threshing part 6 on the left side of the traveling chassis 1 and the part on the left side of the driving part 4 where the engine cooling air is made. An oil tank 36 for storing hydraulic oil of a hydraulically-operated device such as the above is disposed and cooled by engine cooling air flowing from the right side to the left side.

  The oil tank 36 has, for example, a planar flat rectangular shape, and includes a flange 36a that protrudes front and rear and left and right in a plan view on the outer periphery in the vertical direction, and the upper and lower sides of the oil tank 36 extend in the left-right direction. Corrugated plates 36b and 36b having corrugations are attached so that the engine cooling air flows along the upper and lower surfaces to enhance the cooling effect.

  For example, the traveling chassis 1 is constructed by forming a large quadrilateral frame with a hollow outer frame on the front and rear sides of a square in cross section, and a plurality of small squares with a hollow inner frame on the inner side in the left-right direction and the front-rear direction. It is framework to do. On the left side of the traveling chassis 1 and in front of the threshing portion 6, the upper surface of the oil tank 36 is hollow in the traveling chassis 1 so that the bottom surface of the oil tank 36 protrudes downward from the lower surface of the hollow frame of the traveling chassis 1. It is attached via a flange 36a so as to protrude upward from the upper surface of the frame.

  Therefore, the capacity of the oil tank 36 is reduced while securing the capacity, the amount of rocking movement of the front and rear and right and left of the machine body is reduced to suppress oil foaming, and the cooling effect of the oil tank 36 by the cooling air of the engine E can be obtained. Can be increased.

  Further, hydraulic switching valves 38 and 38 are attached to the upper surface of the oil tank 36 via a bracket 37. The bracket 37 refracts the front and rear ends of the plate body downward along the left-right direction, forms a predetermined space between the lower side surface of the plate body of the bracket 37 and the upper surface of the oil tank 36, and the engine cooling air is on the right side. So that the cooling effect of the oil tank 36 is enhanced.

  One hydraulic pressure switching valve 38 performs a switching operation of the traveling continuously variable transmission H, and the other hydraulic pressure switching valve 38 performs a switching operation of a hydraulic operation device such as a lifting cylinder 39 that moves up and down the cutting and conveying section 7 and the like. Yes.

  A drive feed chain transmission case (transmission case) 40 is disposed on the left side of the front side of the feed chain 6 a (shown in FIG. 1) of the threshing unit 6, and hydraulic switch valves 38, 38 below the feed chain transmission case 40. Is arranged.

  A turbo compressor 42 is disposed behind the oil tank 36 and the hydraulic pressure switching valves 38, 38, and the upper surfaces of the hydraulic pressure switching valves 38, 38 and the compressor 42 are arranged at substantially the same height.

  According to the above configuration, the oil tank 36 and the hydraulic pressure switching valves 38, 38 can be sub-assembled and assembled to the traveling chassis 1 to facilitate assembly work and maintenance work. In addition, it is possible to return to the oil tank 36 from the oil pressure switching valves 38, 38, shorten the oil piping, and reduce the cost.

  Further, the oil tank 36, the hydraulic pressure switching valves 38 and 38, and the compressor 42 can be arranged using the lower space of the feed chain 6a and the feed chain transmission case 40 in front of the threshing section 6, and the airframe can be compactly assembled. Can do.

  Further, even if the threshing unit 6 is mounted on the traveling chassis 1 after the oil tank 36, the hydraulic pressure switching valves 38 and 38, and the compressor 42 are disposed on the traveling chassis 1, the assembly work of the threshing section 6 is not disturbed. Can be easily performed.

  Further, since the compressor 42 is disposed at substantially the same height behind the oil tank 36 and the hydraulic pressure switching valves 38, 38, the upper surfaces of the hydraulic pressure switching valves 38, 38 and the compressor 42 are covered with a single small cover. The structure can be simplified and the cost can be reduced.

  In addition, a continuously variable transmission H for traveling is disposed in the front left and right central portions of the traveling chassis 1, and an oil cooler 18 and a hydraulic pump 46 driven by engine power are disposed in the driving section 4 on the right side of the traveling chassis 1. In addition, a hydraulic connection is established between the hydraulic pump 46 and the hydraulic operating device.

  In addition, the return port of the oil cooler 18 and the return port of the oil tank 36 are arranged at a predetermined position in the traveling direction so as to be aligned in a straight line on the left and right sides, and connected between them by a low pressure hydraulic hose 47 that follows the straight line in the left and right direction. Then, the return low-pressure oil passage from the oil return port of the continuously variable transmission H for travel and the return oil passage from the hydraulic operation equipment such as the lifting cylinder 39 are connected to the middle portion of the low-pressure hydraulic hose 47 to operate the oil tank 36. Oil is being returned.

According to the said structure, the wiring space of the low pressure hydraulic hose 47 can be made compact, and the cooling effect of the low pressure hydraulic hose 47 by engine cooling air can be heightened.
Further, the rear end portions of the hydraulic pressure changeover valves 38, 38 are configured to be offset forward from the rear end portion of the lower oil tank 36 by a predetermined distance (for example, about 50 mm, about 1/3 of the front and rear length), It is easy to place and route the hose 47 on the upper surface of the oil tank 36.

Further, the harness 44 connected to the hydraulic pressure switching valves 38, 38 is routed below the bracket 37 of the hydraulic pressure switching valves 38, 38.
According to the above configuration, the return low pressure hydraulic hose 47 can be easily routed from the continuously variable transmission H for traveling, the hydraulic cylinder 48 for operating the working unit, and the like to the oil cooler 18, and the return low pressure hydraulic hose 47 can be shortened. it can. Further, it is possible to prevent the harness 44 from being caught by the hydraulic pressure switching valves 38 and 38 and to improve durability.

  Further, when the oil pressure switching valves 38, 38 are removed from the oil tank 36, the wiring work of the low pressure hydraulic hose 47 above the oil tank 36 becomes easy. Further, when the hydraulic pressure switching valves 38 are removed, the oil tank 36 can be easily removed from the traveling chassis 1 and the maintenance work is facilitated.

Next, the cleaning configuration of the dust removal net 16a of the outside air introduction cover 16 will be described with reference to FIGS.
A dust drop plate 54 that is in sliding contact with the inner surface of the dust removal net 16 a of the outside air introduction cover 16 is provided, and dust is removed by reciprocating the dust drop plate 54 back and forth by forward and reverse rotation of the moving screw shaft 55.

  In the embodiment shown in FIG. 7, the outside air introduction cover 16 includes a rectangular lower dust removal net 16a, an intermediate dust removal net 16b, and a deformed square upper dust removal net 16c whose front side is inclined forward and backward when viewed from the side. Yes. A single dust plate 54 that is slidably in contact with the inner surfaces of the dust removal nets 16a, 16b, and 16c of the outside air introduction cover 16 is moved back and forth by a moving screw shaft 55 to remove dust. ing.

  Then, in order to form a wide range of air intake surface on the upper dust removal net 16c of the outside air introduction cover 16, the upper front side portion (left side in FIG. 7) of the dust drop plate 54 is inclined downward toward the front front side of the upper dust removal net 16c. In addition, the front rear side is configured to be inclined in the front-down direction, the area of the dust drop plate 54 is reduced, and the intake area of the dust removal net 16a of the outside air introduction cover 16 is increased.

  In the embodiment shown in FIG. 8, the dust removing plate 54 that reciprocates in the front-rear direction is divided into a front dust removing plate 54a and a rear dust removing plate 54b that are long in the vertical direction, and the upper front dust removing net 16c has an upper front downward inclined shape. Accordingly, the upper portions of the front and rear dust drop plates 54a and 54b are configured to be inclined forwardly and downwardly. These front and rear dust drop plates 54a and 54b are reciprocated in the front-rear direction over the entire stroke to remove dust while increasing the intake area.

  In the embodiment shown in FIG. 9, a long upper dust removing plate 54d and a lower dust removing plate 54e are provided in the front-rear direction (left-right direction in FIG. 9) reciprocating in the vertical direction, and the front lower slope of the front upper portion of the upper dust removal net 16c is provided. The front side portions of the upper dust removing plate 54d and the lower dust removing plate 54e are inclined downward in accordance with the shape so that the intake area is widened and dust is removed while reciprocating in the vertical direction.

  In the embodiment shown in FIG. 10, the dust removing plate 54 that reciprocates in the front-rear direction is divided into a plurality of front dust removing plates 54f, an intermediate dust removing plate 54g, and a rear dust removing plate 54h. The upper portions of the front dust drop plate 54f and the intermediate dust drop plate 54g are configured to have a front lower slope shape in accordance with the upper front downward slope shape.

  The thread groove of the moving screw shaft 55 arranged in the front-rear direction is set to be divided into a front part, an intermediate part, and a rear part, and only the front side part of the outside air introduction cover 16 is moved forward and backward. Dust is removed while reciprocating, and dust is removed while the intermediate dust drop plate 54g is moved back and forth between the front and rear intermediate portions of the outside air introduction cover 16, and the rear dust drop plate 54h is reciprocated back and forth at the rear side of the outside air introduction cover 16. Dust is removed while moving.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle stand 2 Crawler traveling device 3 Steering part 4 Driving part 5 Glen tank 6 Threshing part 6a Feed chain 7 Cutting and conveying part 10 Driver's seat 12 Cooling fan 18 Oil cooler 31 Traveling mission case 36 Oil tank 38 Hydraulic switch valve 40 Feed chain transmission Case 42 Compressor 47 Return low pressure hydraulic hose E Engine H Hydraulic continuously variable transmission

Claims (5)

  A steering part (3) and a driving part (4) are arranged on the left and right sides of the traveling chassis (1), a threshing part (6) is arranged on the left and right other side, and a cutting and conveying part (7) is arranged on the front part. In the combine that can be moved up and down, the engine (E) and the cooling that introduces outside air into the engine (4) are disposed in the engine (4) disposed below the control unit (3). A fan (12) and a hydraulic oil cooler (18) for cooling the hydraulic oil supplied to the hydraulic equipment are provided, and the cooling air from the cooling fan (12) flows from one side to the other side on the left and right sides. (E) and the oil cooler (18) are cooled, and an oil tank (36) for storing hydraulic oil to be supplied to the hydraulic equipment is arranged at a portion where the cooling air flowing out from the prime mover (4) flows. The lower part of the oil tank (36) is provided from the lower surface of the traveling chassis (1). Write to protrude, and, combined, characterized in that attached to the traveling undercarriage (1) such that the upper portion protruding upward from the upper surface of the running chassis (1).   The combine according to claim 1, wherein a hydraulic pressure switching valve (38) is disposed above the oil tank (36).   The combine according to claim 1 or 2, wherein the hydraulic pressure switching valve (38) is disposed below a transmission case (40) for driving the feed chain (6a) of the threshing part (6).   The compressor (42) is disposed behind the oil tank (36) and the hydraulic pressure switching valve (38), and the upper surfaces of the hydraulic pressure switching valve (38) and the compressor (42) are disposed at substantially the same height. The combine according to any one of claims 3 to 4.   The oil return ports of the oil cooler (18), the hydraulic pump (46), and the hydraulic pressure changeover valve (38) are arranged in the left-right direction at the site where the engine cooling air flows, and between these oil return ports. The combine according to any one of claims 1 to 4, wherein the two are connected by a linear return low-pressure hydraulic hose (47) along the left-right direction.

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