JP5904142B2 - Combine - Google Patents

Description

The present invention relates to Konbai down.

  It is well known that a combined cooling fan is driven by a hydraulic continuously variable transmission and switched between a forward rotation drive engine cooling state and a reverse rotation drive dust removal state (Patent Document 1).

JP 2013-9605 A

  In the invention of the background art, a cooling fan is disposed on the engine side, and the cooling fan is driven from the continuously variable transmission for cooling fan disposed on the traveling vehicle body via the belt transmission. However, the cooling fan and the continuously variable transmission for the cooling fan have different vibrations, so that the durability of the belt transmission device is lowered and the assembly work is complicated.

  Therefore, the present invention solves the above problems by separating the cooling fan from the engine and installing it on the traveling vehicle body together with the hydraulic continuously variable transmission for the cooling fan, and further, the cooling fan has a compact and strong arrangement. It is what you want to make.

According to the first aspect of the present invention, the control unit (3) is disposed on the upper side of the traveling vehicle body (1), and the driving unit (4) below the driver's seat (10) included in the control unit (3) is provided. Includes an engine (E), a cooling fan (12) and a radiator (13) are disposed outside the engine (E) in the driving section (4), and the cooling fan is erected from the traveling vehicle body (1). The frame (22, 22) supports the cooling fan (12) via a support member (25), and the support member (25) has a circular ventilation opening (25b) at the center. A plate (25a) is provided, and the cooling fan (12) is moved from the side of the shaft (12a) serving as the rotation axis of the cooling fan (12) to the peripheral portion of the ventilation opening (25b) in the mounting plate (25a). a plurality of support arms (25c, ...) which extend radially toward the mounting plate Supported on 25a), said cooling fan (12), the cooling fan (12) a transmission device for interlocking the continuously variable transmission is driven by steplessly (91) to (37), a cooling fan (12 ) In the distance between the plurality of support arms (25c,...), And a traveling mission disposed in the periphery of the driving section (4) in the traveling vehicle body (1). A cutting frame (43) for suspension is provided on the side of the case (31), and the frame (45) standing from the traveling transmission case (31) and the cutting frame (43) is provided with the cutting frame (43). A combine that supports a continuously variable transmission (91) .

According to a second aspect of the present invention, there is an inner cover (55) and an outer cover (56) between the front side surface and the upper side surface of the driving unit (4) and the driver's seat (10) of the control unit (3). partition a co Nbain of claim 1 attached to the steering unit inner cover (55) an outer cover (56) with a predetermined gap frame portion (3) (47a).

According to a third aspect of the present invention, the lower part of the driver seat mounting frame (57) with the driver seat (10) attached to the upper part is formed between the inner cover (55) and the outer cover (56). a co Nbain of claim 2 which intruded into the space portion (62) that.

  According to the first aspect of the present invention, the transmission device (37) interlocking with the continuously variable transmission (91) that drives the cooling fan (12) by continuously changing the speed is provided from the axial direction of the cooling fan (12). As seen, since the cooling fan (12) is disposed in the space between the plurality of support arms (25c,...), The cooling fan (12) is supported on the support member (25) that supports the radiator (13). ) Can be firmly supported to increase durability, and the transmission (37) can be compactly arranged.

Further, since the continuously variable transmission (91) is supported on the frame (45) standing from the traveling mission case (31) and the cutting frame (43), the supporting member of the control unit (3) and the cooling fan The support member of the step transmission (91) can be separated, and the vibration of the driver's seat (10) of the control unit (3) can be reduced, and the driver's fatigue can be reduced.

According to claim 2 the invention described, in addition to the effect of the invention according to claim 1, steering unit inner cover (55) and the outer cover (56) with a predetermined gap frame portion (3) (47a ), It is possible to improve the comfort of the driver's seat (10) by blocking the vibration and high temperature of the driving part (4).

According to the invention described in claim 3 , in addition to the effect of the invention described in claim 2 , the lower side portion of the driver seat mounting frame (57) to which the driver seat (10) is attached is arranged on the inner cover (55). ) And the outer cover (56), the driver seat (10) is compactly constructed while firmly forming the inner cover (55) and the outer cover (56). can do.

The right view of the whole combine. The left view of the whole combine. The top view of the whole combine. The front view which abbreviate | omitted one part of the control part and the engine part. The top view which abbreviate | omitted one part of the control part and the engine part. The left view which abbreviate | omitted one part of the control part and the engine part. The left view of an engine part. The top view which abbreviate | omitted one part of the control part and the engine part. The left view which abbreviate | omitted one part of the radiator and the cooling fan part. The front view which abbreviate | omitted one part of the control part and the engine part. The front view which abbreviate | omitted one part of the control part and the engine part. The left view which abbreviate | omitted one part of the control part and the engine part. The top view which abbreviate | omitted one part of the control part and the engine part. The left view which abbreviate | omitted a part of the control part and the drive part. The top view and side view of a radiator, an inner cover, and an outer cover. The bottom view of an inner cover and an outer cover. The top view and side view of a radiator, an inner cover, and an outer cover. The left view of a control part and a drive part. Front view and right side view of outside air introduction cover and radiator. The time chart which shows the drive state of a discharge auger, the forward / reverse stop state of a cooling fan, and the open / close state of a dust discharge window. The front view of a radiator part, a top view, and a side view. The left view which shows the opening-closing structure of a cabin, the side view of an opening-closing means, and a top view. The side view which abbreviate | omitted a part of cabin. The rear view which abbreviate | omitted a part of cabin.

Embodiments of the present invention will be described below based on the drawings.
First, the overall structure of a combine equipped with the present invention will be described with reference to FIGS. The front side, the rear side, the left side, and the 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 vehicle body 1 of the combine, the control unit 3 with the driver's seat 10 is disposed at the right front portion of the traveling vehicle body 1, and the driver's seat 10 at the rear of the control unit 3. A driving unit 4 equipped with an engine is disposed below, and a grain tank 5 for storing grains is disposed behind the control unit 3. A threshing unit 6 is disposed on the left side of the traveling vehicle body 1, a cutting and conveying unit 7 is provided on the entire front side of the traveling vehicle body 1 so as to be movable up and down, and a waste disposal device 8 is disposed on the rear part of the traveling vehicle body 1. ing. Further, the control unit 3 is covered with a cabin 15, and a discharge auger 9 is provided on the rear side of the Glen tank 5 so that the grains in the Glen tank 5 are discharged to the outside.

Next, specific configurations of the control unit 3 and the driving unit 4 will be described with reference to FIGS. 4 to 7.
A driving unit 4 is provided below the rear part of the control unit 3, the driving unit 4 is configured in a rectangular parallelepiped shape that is long in the left-right direction, and the engine E is supported on the traveling vehicle body 1 at the bottom in the driving unit 4 via mounts 23. The crankshaft Ea is disposed along the left-right direction. A cooling fan 12 is supported on the right side of the engine E so as to be rotatable about a left-right axis, a radiator 13 is disposed on the right side of the cooling fan 12, and an intercooler 17, an oil cooler 18, dust removal is provided on the right side of the radiator 13. An outside air introduction cover 16 with a net 16a is provided.

  A hydraulic continuously variable transmission (continuously variable transmission) 91 for the cooling fan is disposed at a position on the upper left side of the engine E outside the rotation locus of the cooling fan 12 to provide a hydraulic continuously variable transmission for the cooling fan. The cooling fan 12 is driven forward, reverse, and increased / decreased by 91. Thus, the cooling fan 12 sucks outside air through the dust-proof net 16a of the outside air introduction cover 16 in the forward rotation driving state to cool the radiator 13, the intercooler 17, the oil cooler 18, and the engine E, and in the reverse rotation driving state, the outside air The inside air is exhausted via the dust-proof net 16a of the introduction cover 16, and the wastes and dust adhering to the dust-proof net 16a of the outside air introduction cover 16 are removed.

  As shown in FIG. 4, the radiator 13 is surrounded by a shroud 21 to introduce cool air to the engine E side, and the intercooler 17 and the oil cooler 18 disposed on the right outer side of the radiator 13 are connected to the shroud 21 via a bracket. It is attached.

  As shown in FIGS. 4 to 6, the hydraulic continuously variable transmission 91 for the cooling fan is disposed above the left side (right side in FIG. 4) of the engine E to supercharge the intake air of the engine E. It is disposed in front of the turbine 24 into which the exhaust gas of E flows and at an upper part of the crankshaft Ea of the engine E behind the traveling hydraulic continuously variable transmission HSTa.

  Further, as shown in FIG. 6, it is arranged below the support plate 10a that opens and closes in the left-right direction together with the driver's seat 10 in the cabin 15, and as shown in FIG. It arrange | positions so that it may deviate.

  Further, as shown in FIG. 6, a traveling mission case 31 is disposed in front of the left side of the cooling fan hydraulic continuously variable transmission 91 at the front center portion of the traveling vehicle body 1, and is inclined forward from the crankshaft Ea of the engine E. Power is transmitted to the traveling hydraulic continuously variable transmission HSTa via the traveling HST belt transmission 34, and further, the left and right crawler traveling is performed via a gear-type auxiliary transmission (not shown) in the traveling mission case 31. Power is transmitted to the devices 2 and 2.

  As shown in FIGS. 4, 5, and 6, the cooling fan HST belt transmission 35 and the cooling fan hydraulic continuously variable from the pulley of the input shaft HSTaa of the traveling hydraulic continuously variable transmission HSTa to the rear rising slope Power is transmitted to the left (right side in FIG. 5) end of the cooling fan transmission shaft 32 via the transmission 91, and the second cooling fan belt transmission device (from the right side (left side in FIG. 5) of the cooling fan transmission shaft 32 ( Power is transmitted to the cooling fan 12 via the transmission 37) and the pulley 12b.

  Further, as shown in FIG. 6, a tension clutch device 30a including a tension pulley and a tension arm is disposed on the upper outer peripheral portion of the traveling HST belt transmission device 34 so that the traveling HST belt transmission device 34 is driven during reverse rotation. It prevents the transmission belt from loosening and enhances durability.

A tension clutch device 30b including a tension pulley and a tension arm is disposed on the lower outer peripheral portion of the cooling fan HST belt transmission device 35 to prevent the transmission belt from loosening when the cooling fan HST belt transmission device 35 is driven in reverse rotation. To improve durability.
(14431)
Next, the transmission configuration from the cooling fan continuously variable transmission 91 to the cooling fan 12 will be described with reference to FIGS.

  Driving HST belt transmission 34, driving hydraulic continuously variable transmission HSTa, cooling fan HST belt transmission 35, cooling fan hydraulic continuously variable, in which the power of engine E is disposed in the periphery of engine E Power is transmitted to one end of the cooling fan transmission shaft 32 via the transmission 91, and power is transmitted from the other end of the cooling fan transmission shaft 32 to the cooling fan 12 via the second cooling fan belt transmission 37 and the pulley 12b. ing.

As shown in FIGS. 8 to 9, front and rear cooling fan frames (“cooling fan frame” in the claims) 22, 22 are erected from the front and rear of the driving part 4 of the traveling vehicle body 1, and the front and rear cooling fan frames 22 , 22, the cooling fan 12 is pivoted via mounting means (supporting member) 25 that supports the radiator 13. Mounting means 25 includes a mounting plate 2 5 a is provided with the circular blowing apertures 2 5 b at the center in the left side view, in the center of the blower opening 2 5 b from the periphery of the mounting plate 2 5 a For example, three support arms 2 5 c,... That extend toward the end, and a circular support body 2 5 d attached to the tip of the support arms 2 5 c,. The shaft portion 12a of the cooling fan 12 via a bearing to the support 2 5 a and支架so as to protrude toward the left inner, is fixed to a pulley 12b on the left end portion of the shaft portion 12a.

  A second cooling fan belt transmission 37 and an upper hose 26 for cooling water are arranged between the adjacent support arms 25c,..., One end of the upper hose 26 is connected to the engine E, and the other end is connected to the upper portion of the radiator 13. doing. The three support arms 25c,..., The second cooling fan belt transmission 37, and the upper hose 26 are arranged so as to overlap in the vertical direction perpendicular to the shaft portion 12a of the cooling fan 12, thereby The width is configured to be narrow.

  A drive unit support frame 39 is disposed between the mounting plate 25a, the support arm 25c,... And the engine E, and a midway part of the drive unit support frame 39 is bent to the outer peripheral portion of the air blowing opening 25b of the mounting plate 25a. The both ends are refracted inward so as to protrude along the inner peripheral side of the blower opening 25b, and are fixed to the upper two support arms 25c, 25c with pins. The right side (left side in FIG. 10) of the cooling fan transmission shaft 32 is supported on the upper surface of the drive unit support frame 39 via a bracket 41, and a tension arm 37a for the second cooling fan belt transmission 37 is provided on the bracket 41. The shaft is supported and the tension clutch 37b is connected to and disconnected from the second cooling fan belt transmission 37.

  According to the above configuration, the cooling fan transmission shaft 32, the cooling fan 12, and the tension arm arm 37a can be supported by the mounting means 25, and the second cooling fan belt transmission device 37 can be properly turned on and off with a compact and strong configuration. can do.

Next, a support configuration of the cooling fan continuously variable transmission 91 will be described with reference to FIGS.
A traveling mission case 31 is disposed at the front center portion of the traveling vehicle body 1, and a cutting frame 43 for suspending the cutting and conveying unit 7 is erected on the left side (right side in FIG. 11) of the traveling mission case 31 of the traveling vehicle body 1. The cutting and conveying unit 7 is supported on the upper end portion of the cutting frame 43 so as to be rotatable around the cutting and transmitting shaft 44 in the left and right direction, and power is transmitted from the cutting and transmitting shaft 44 to each operating portion of the cutting and conveying unit 7.

  Then, an HST frame (frame) 45 is erected from the traveling mission case 31 and the cutting frame 43, and a cooling fan continuously variable transmission 91 is mounted on the upper surface of the HST frame 45. The cooling fan transmission shaft 32 extends from the right side to the HST frame 45, and the cooling fan transmission shaft 32 is supported on the HST frame 45 via a bracket 45a.

  Further, a plurality of front and rear control frames 47,... Are erected from the lower facing portion of the control unit 3 of the traveling vehicle body 1, and the upper front frame 48 is provided at the upper end of the left and right control frames 47, 47 on the front side. The front operation panel is attached to the upper front frame 48. Further, an upper left frame body 49 is attached to the upper ends of the left and right front and rear control frame bodies 47,... And a frame structure is formed by connecting the upper front frame body 48 and the upper left frame body 49. The left operation panel is installed.

  Further, the driver's seat 10 is attached to the left and right control frame bodies 47,. The reinforcement frame 51 is extended from the rear portion of the traveling vehicle body 1 toward the traveling mission case 31, and the front side portion of the reinforcement frame 51 is connected to the traveling mission case 31 to reduce the vibration of the control unit 3.

  When the cooling fan continuously variable transmission 91 is attached to the frame portion of the control unit 3, vibration and noise of the cooling fan continuously variable transmission 91 are transmitted to the driver's seat 10 of the control unit 3, Increase noise. However, according to the said structure, since the cooling fan continuously variable transmission 91 is attached to the HST frame 45 different from the support member of the control part 3, the said problem can be solved, simplifying a structure.

Next, the cover configuration at the boundary between the control unit 3 and the driving unit 4 will be described with reference to FIGS.
The front side surface and the upper side surface of the driving unit 4 have a double structure of an inner cover 55 and an outer cover 56, and the driver's seat 10 is disposed above the front side surface and the upper side surface. An infinite number of small holes of the inner cover 55 are reversely viewed from the side by a rectangular front inner cover 55a and a rectangular inner upper cover 55b that is bent backward from the upper end of the front inner cover 55a. It is configured in a letter shape. Similarly, the non-perforated outer cover 56 is configured by a rectangular front outer cover 56a and an upper outer cover 56b in a reverse L shape in side view.

  The control frame body 47,... Erected from the traveling vehicle body 1 is provided with a cover mounting frame 47a,... Facing the front side surface and the upper side surface of the prime mover 4, and the cover mounting frame 47a,. The lower surface of the cover 55 is bolted.

  The driver seat mounting frame 57 is configured as a reverse L-shape in side view by a front vertical frame 57a and an upper horizontal frame 57b extending rearward from the upper end of the front vertical frame 57a. The driver seat mounting frame 57 is bolted to the upper side surface of the inner cover 55, and the outer cover 56 is bolted to the upper side surface of the inner cover 55 and the upper side surface of the driver seat mounting frame 57. 10 is attached.

  Further, bulging portions 55c,... Are formed along the middle portions of the inner front cover 55a and the inner upper cover 55b in the left-right direction, respectively, and the outer front cover 56a and the outer upper cover 56b of the outer cover 56 are formed. The bulging portions 55c,... Are brought into contact with the intermediate portion and bolted, so that the covers 55 and 56 are firmly joined.

  According to the above configuration, since the outer cover 56 and the driver seat mounting frame 57 can be attached using the inner cover 55, a simple cover mounting configuration and a strong cover configuration can be achieved to reduce noise in the cabin. it can.

  Also, a concave space that is long in the up-down direction and is recessed rearward at the front left-right intermediate portion of the inner front cover 55a and the inner upper cover 55b and the front left-right intermediate portion of the outer front cover 56a and the outer upper cover 56b. The part (space part) 62 is comprised. The cylindrical vertical adjustment means 64 of the driver's seat 10 is disposed so as to enter the concave space 62, and the vertical adjustment means 64 of the driver's seat 10 is configured compactly.

  Further, as shown in FIG. 17, in the double cover configuration of the inner cover 55 and the outer cover 56, an opening 55d is provided above the fuel filler opening 13a of the radiator 13 of the inner upper cover 55b and at the front portion of the driver seat 10. A removable cap cover 58 is provided above the oil supply port 13a of the radiator 13 of the outer upper surface cover 56b. Therefore, the water supply of the radiator 13 can be easily performed in a normal state where the driver's seat 10 is left above the driving unit 4.

  As shown in FIGS. 17 and 18, in the double cover configuration of the inner cover 55 and the outer cover 56, the cooling fan transmission shaft 32 and the second cooling fan belt transmission device 37 are disposed on the inner portion of the inner cover 55. An intercooler hose 61 is disposed on the side to reduce the size of the transmission device and the cooling structure.

Next, the dust removal configuration of the outside air introduction cover 16 will be described with reference to FIGS. 19 and 20.
In the configuration in which the outside air introduction cover 16, the radiator 13, the intercooler 17, and the oil cooler 18 with the dustproof net 16a are provided, and the cooling fan 12 is driven in reverse to remove dust, the dust discharge window 16b is opened and closed at the bottom of the outside air introduction cover 16. It is configured such that dust can be discharged, and the opening and closing rod 68 is operated by forward and reverse driving of the motor 67 to open and close the dust discharge window 16b.

  When a cleaning switch (not shown) is operated when cleaning the outside air introduction cover 16, the cooling fan continuously variable transmission 91 is stopped based on a dust cleaning command from a controller (not shown), and the cooling fan 12 is rotated. Stop for a predetermined time. Then, during the stop time, the motor 67 is first driven in reverse to open the dust discharge window 16b of the outside air introduction cover 16 to discharge the dust, and then the motor 67 rotates forward to close the dust discharge window 16b. Next, the cooling fan 12 is driven in reverse to blow air from the inside to the outside to remove dust from the dust removal net 16a of the outside air introduction cover 16, and the cleaning operation for a predetermined time is completed. Next, when a cooling fan forward rotation switch (not shown) is operated, the cooling fan 12 is driven forward so that the cooling operation is started.

Note that the grain discharge clutch (not shown) may be turned on, and the dust discharge work and dust cleaning work may be performed only during the grain discharge work of the discharge auger 9.
FIG. 20 is a time chart showing the drive on / off state of the discharge auger 9, the forward / reverse stop state of the cooling fan 12, and the open / close state of the dust discharge window 16b.

According to the above configuration, the dust-proof net 16a of the outside air introduction cover 16 can be cleaned while preventing dust from adhering to the intercooler 17 and the oil cooler 18.
Next, the mounting structure of the radiator 13 will be described with reference to FIG.

  A radiator frame 71 is erected from both front and rear sides of the radiator 13 of the traveling vehicle body 1. The radiator frame 71 is configured as a side-view gate type with front and rear frames 71a and 71b, and connecting frames 71c connecting the upper, lower, and upper and lower intermediate portions of the front and rear frames 71a and 71b. The radiator frame 71 and the frame portion of the control unit 3 are connected to each other and firmly supported on the traveling vehicle body 1.

  The radiator 13 is bolted to the front and rear frames 71a and 71b of the radiator frame 71 via the front and rear brackets 13b and 13b, and is attached so that the bottom of the radiator 13 is floated from the traveling vehicle body 1. 18 is bolted.

  According to the said structure, the intercooler 17 and the oil cooler 18 can be supported firmly, aiming at the strength improvement of the control part 3 and the drive part 4. FIG. Further, by removing the hose 17a and the hose 18a from the intercooler 17 and the oil cooler 18, the radiator 13 can be detached from the radiator frame 71, and the maintenance becomes easy.

Next, the opening / closing configuration of the rear ceiling of the cabin 15 will be described with reference to FIG.
The rear central portion of the ceiling 15a of the cabin 15 is configured as an openable / closable hatch 15b. The hatch 15b is provided with an openable / closable ceiling plate 15d around the pin 15c in the left-right direction, and can be supported by the open / close support means 75. It is configured. The opening / closing support means 75 is configured to allow the opening / closing ceiling plate 15d to be opened in a small amount so as to correspond to the normal operation, or to be opened and supported in a large open state so as to correspond to the maintenance operation.

  The opening / closing support means 75 is composed of an elastic damper 75a whose one end is pin-connected to the rear side of the inner surface of the opening / closing ceiling plate 15d, and a pair of links 75b and 75c which are pin-connected to be bent. One end of the link 75b is pin-connected to the other end of the damper 75a, and the other end of the link 75c is pin-connected to the bracket 17d of the ceiling portion 15a.

  Therefore, when the opening / closing support means 75 is opened in a small amount, as shown in FIG. 22A, the opening / closing support means 75 is shortened by the links 75b and 75c that are folded and shortened with the damper 75a, thereby opening and closing the ceiling. A small amount of the plate 15d is supported.

  When the open / close support means 75 is in the large open state, as shown in FIG. 22B, the open / close support means 75 is lengthened by the links 75b and 75c extending linearly with the damper 75a to open and close the ceiling board. 15d is supported in a large open state.

When the opening / closing ceiling plate 15d is closed and locked to the cabin 15 by the locking means 78, the opening / closing support means 75 is in a state where the damper 75a and the links 75b, 75c are linearly extended.
Next, the step configuration of the control unit 3 will be described with reference to FIGS.

  This relates to an auxiliary step 82 used when the operator gets on and off the driver's seat 10 in the cabin 15. A fixed step 80 is provided at the lower right side of the control unit 3, and the front and rear direction front and rear arms are provided at the base of the front and rear turning arms 81 and 81. The shafts 81a and 81a are fixed, and the front and rear rotating arms 81 and 81 are pivotally supported around the front and rear shafts 81a and 81a on the frame portion below the fixing step 80. The front / rear turning arms 81, 81 are composed of bent portions 81b, 81b refracted in a U-shape on the base side and linear tip arms 81c, 81c on the tip side extending in the outer peripheral direction, and the tip arm 81c , 81c, and an auxiliary step 82 is attached to the tip of the frame.

  The upper and lower rotating plates 83, 83 are fixedly extended in the vertical direction from the front end portion of the front shaft 81a, and the front and rear rotating arms 81, 81 are rotated downward on the upper and lower rotating plates 83, 83 to assist steps. In the lower projecting state of 81, the vertical rotation plates 83, 83 are configured to project in the vertical direction and inward at an angle slightly smaller than 180 degrees. The frame portion supports a step operation lever 84 with a gripping portion 84a so as to be movable up and down, and upper and lower connection plates 85 and 85 are attached to the lower portion of the step operation lever 84 so as to extend downward. The lower end portion of 85 is pin-connected to the tips of the vertical rotation plates 83 and 83.

  The front and rear pivot arms 81 and 81, the vertical pivot plates 83 and 83, the step operation lever 84, and the upper and lower connection plates 85 and 85 are arranged at a position deviated from the driver's seat 10 to the right side, which is on the passenger side. The operation members 81, 81, 83, 83, 84, 85, 85 can be operated and the auxiliary step 82 can be protruded and stored in a normal operation state in which 10 is pivoted upward. .

  When the step operation lever 84 is pushed downward from the upper side, the front and rear turning arms 81 and 81 are rotated halfway upward and inward via the upper and lower connection plates 85 and 85, the pins p and p, and the turning plate 83. The front and rear turning arms 81 and 81 and the auxiliary step 82 turn upward and are accommodated within the body width.

  Further, when the step operation lever 84 is pulled upward from below, the front and rear pivot arms 81 and 81 are rotated halfway downward and fixed via the upper and lower connection plates 85 and 85, the pins p and p, and the pivot plate 83 and fixed. The auxiliary step 81 protrudes out of the body width at a lower part of the step 80, and the operator can get on and off easily.

  According to the above configuration, when there is an obstacle on the right side during the cutting operation by the operator and the auxiliary step 82 needs to be stored, the step operation lever 84 is moved downward by hand or foot while sitting in the driver's seat 10. It can be stored by performing a push-down operation, and interruption of the cutting operation can be avoided. Further, when getting off the combine, it is possible to operate the step operation lever 84 from the driver's seat 10 to protrude the stored auxiliary step 82 and to get on and off easily.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 3 Steering part 4 Driving part 6 Threshing part 7 Harvesting conveyance part 10 Driver's seat 12 Cooling fan 12a Shaft part 13 Radiator 25 Mounting means (support member)
25a Mounting plate
25b Blower opening 25c Support arm 26 Cooling upper hose 31 Traveling mission case 37 Second cooling fan belt transmission device (transmission device)
39 Drive unit support frame 43 Mowing frame 45 HST frame (frame)
55 Inner cover 56 Outer cover 57 Driver seat mounting frame 62 Concave space (space)
E engine 91 hydraulic continuously variable transmission for cooling fan (continuously variable transmission)

Claims (3)

A steering part (3) is disposed above the traveling vehicle body (1), and a driving part (4) below the driver's seat (10) provided in the steering part (3) includes an engine (E), A cooling fan (12) and a radiator (13) are arranged on the outer side of the engine (E) in the driving part (4), and the cooling fan frame (22, 22) erected from the traveling vehicle body (1), The cooling fan (12) is supported via a support member (25), and the support member (25) is provided with a mounting plate (25a) having a circular air blowing opening (25b) in the center, and the cooling A plurality of supports that radially extend the fan (12) from the side of the shaft (12a) serving as the rotation axis of the cooling fan (12) toward the peripheral portion of the ventilation opening (25b) in the mounting plate (25a) arms (25c, ...) and supporting the mounting plate (25a) by the The transmission device (37) that links the rejection fan (12) and the continuously variable transmission (91) that drives the cooling fan (12) by continuously changing the speed is viewed from the axial direction of the cooling fan (12). And arranged in a space between the plurality of support arms (25c, ...) ,
Provided on the side of a traveling mission case (31) disposed in the periphery of the driving section (4) in the traveling vehicle body (1) is a cutting harvesting frame (43) for suspension of the harvesting conveying section (7), A combine in which the continuously variable transmission (91) is supported on a frame (45) standing from a traveling mission case (31) and a cutting frame (43) . An inner cover (55) and an outer cover (56) partition between the front side and upper side of the driving part (4) and the driver's seat (10) of the control part (3), and the inner cover (55) co Nbain of claim 1 attached to the steering unit the outer cover (56) with a predetermined gap frame portion (3) (47a). The lower part of the driver seat mounting frame (57) with the driver seat (10) attached to the upper part enters the space part (62) formed between the inner cover (55) and the outer cover (56). co Nbain of claim 2.

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