JP2018139546A - Harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a harvester that is less prone to influence an adjustment operation of physical relationship between one operation lever and a control valve, on physical relationship between the other operation lever and a control valve.SOLUTION: The harvester includes a two-way operation lever 13 and a one-way operation lever 14, with their aligned in a horizontal direction, where the two-way operation lever performs steering operation and lifting/lowering operation of a reaper, and the one-way operation lever performs lifting/lowering operation of a raking reel for the reaper. A first oscillation spindle 61 for longitudinal oscillation operation, in the two-way operation lever 13, and a second oscillation spindle 40 for longitudinal oscillation operation, in the one-way operation lever 14, are separately provided. A control valve V2 to be operated by the longitudinal oscillation of the two-way operation lever 13 and a control valve V3 to be operated by the longitudinal oscillation of the one-way operation lever 14 are composed of a single valve unit VB.SELECTED DRAWING: Figure 3

Description

  The present invention includes a two-way operation lever for performing a steering operation of a traveling machine body and a lifting operation of a cutting unit by a swinging operation in a front-rear direction and a left-right direction at an upper part of a control tower provided at a front part of a driving unit, The present invention relates to a harvesting machine provided with a one-way operation lever that performs a raising / lowering operation of a scraping reel with respect to the cutting portion by a swinging operation in a direction.

As described above, the two-way operation lever that performs the steering operation of the traveling aircraft and the raising / lowering operation of the cutting unit by the swinging operation in the front-rear direction and the left-right direction, and for scraping the cutting unit by the swinging operation in the front-rear direction An example of a harvester provided with a one-way operation lever for raising and lowering a reel is one having a structure described in [1] below.
[1] A two-way operation lever for performing a steering operation of the traveling machine body and a lifting operation of the cutting unit by a swinging operation in the front-rear direction and the left-right direction on the upper part of the control tower provided in the front part of the driving unit, and the front-rear direction And a one-way operation lever for performing a raising / lowering operation of the scraping reel with respect to the cutting portion. And it is comprised so that a control valve can be operated by operation of each lever, and the cutting part raising / lowering device and turning operation device comprised of a hydraulic actuator, and the raising / lowering operation device of a scraping reel can be operated separately ( For example, see Patent Document 1).

JP 2007-159468 A (see paragraphs “0032” and “0038” and “FIG. 11” and “FIG. 12” in the drawings)

In the structure shown in Patent Document 1, a two-way operation lever and a one-way operation lever provided at the upper part of the control tower are used in combination, with a relatively simple structure, a reaping unit lifting device, a turning operation device, In addition, the lifting and lowering operation device for the scraping reel is useful in that it can be operated individually and reliably.
In this structure, the support shaft for the back-and-forth swing operation of the two-way operation lever and the support shaft for the back-and-forth swing operation of the one-way operation lever are configured as a common single shaft and linked to each operation lever. The control valve is supported by a common valve block. For this reason, when trying to adjust the positional relationship between one of the two-way operation lever and the one-way operation lever and the corresponding control valve, the rotation angle of the common spindle changes, There is a possibility that the positional relationship between the other operation lever and the control valve corresponding to the other operation lever may also change. Therefore, there is room for improvement in that it is difficult to easily adjust the positional relationship between one of the operation levers and the control valve.

  The present invention devised the shaft support structure of the two-way operation lever and the one-way operation lever, and with a simple structure, the adjustment operation of the positional relationship between one operation lever and the control valve can be performed by the other operation lever and the control valve. It is intended to provide a harvester that is less likely to affect the positional relationship between

  The harvesting machine according to the present invention is a two-way operation lever for performing a steering operation of the traveling machine body and a lifting operation of the harvesting unit by a swinging operation in the front-rear direction and the left-right direction on an upper part of a control tower provided at the front part of the operation unit. And a one-way operation lever for raising and lowering the scraping reel with respect to the cutting portion by a swing operation in the front-rear direction. And a second swing support shaft for swinging in the front-rear direction of the one-way operation lever, each of which is operated by swinging in the front-rear direction of the two-way operation lever. The control valve and the control valve operated by swinging the one-way operation lever in the front-rear direction are characterized in that they are configured by a single valve unit.

According to this configuration, the first swing support shaft having the swing shaft center in the front-rear direction of the two-way operation lever and the second swing support shaft having the swing shaft center in the front-rear direction of the one-way operation lever. A shaft is provided for each. For this reason, the positional relationship between the two-way operation lever and the control valve is adjusted to adjust the positional relationship between the one-way operation lever and the control valve. Even if the rotation angle of the second swing support shaft is slightly changed, the change in the rotation angle of one swing support shaft does not affect the rotation angle of the other swing support shaft.
Therefore, there is an advantage that the adjustment operation of the positional relationship between one operation lever and the control valve can be easily performed in a state where there is little possibility of affecting the positional relationship between the other operation lever and the control valve.

  In the present invention, the end portion on the second swing support shaft side of the first swing support shaft and the end portion on the first swing support shaft side of the second swing support shaft are supported. It is preferable that a supporting member is provided in the control tower.

According to this configuration, the end of the first swing support shaft on the second swing support shaft side and the first swing support shaft side of the first swing support shaft are supported by the support member provided in the control tower. Ends are supported.
Therefore, the end portion on the second swing support shaft side of the first swing support shaft and the end portion on the first swing support shaft side of the second swing support shaft are supported by the common support member, so that It is possible to support both the first and second swinging support shafts with a simple structure, and to simplify the structure.

  In the present invention, the support member has a horizontal portion on which one end of the first swing support shaft and the second swing support shaft is supported, the first swing support shaft, and the first swing support shaft. It is preferable that a vertical portion on which the other end of the two swing support shafts is supported is provided.

  According to this configuration, since the support member is provided with the horizontal portion and the vertical portion, the first swing support shaft and the second swing support shaft intersect with each other in the axial direction or the axial center. Even if it is arranged in a position-shifted state, it is possible to support both shafts by absorbing the amount of the position shift.

  In the present invention, the position of one of the first swing support shaft and the second swing support shaft can be changed with respect to the support member, and the first swing support shaft and the second swing support shaft can be changed. It is preferable that the other of the moving support shafts is supported so as not to change its position with respect to the support member, and the valve unit is configured to be capable of adjusting a mounting position with respect to the control tower.

According to this configuration, since either the first swing support shaft or the second swing support shaft can be changed in position, the relative relationship between the first swing support shaft and the second swing support shaft can be changed. The relative positional relationship can be easily adjusted.
In addition, since the assembly of the support member supporting the first swing support shaft and the second swing support shaft is configured so that the mounting position with respect to the control tower can be adjusted, the control valve side connected to the hydraulic system can be adjusted. It is easy to change the positions of the first swing support shaft and the second swing support shaft without changing the positions.

  In the present invention, it is preferable that the support position of the second swing support shaft with respect to the support member is configured to be adjustable.

According to this configuration, the two-way operation lever that performs the steering operation of the traveling machine body and the raising / lowering operation of the cutting unit is scraped against the cutting unit, not the first swinging support shaft having the swing axis in the front-rear direction. A second swing support shaft having a swing shaft center in the front-rear direction of the one-way operation lever for performing the lifting operation of the reel is adjustable.
In other words, with regard to the two-way operation lever that performs the steering operation that is frequently used and the raising / lowering operation of the cutting part, the first swing support shaft having the swing axis in the front-rear direction is the position where it is most easily operated. It is used in a state where it is stably fixed and has good operability and durability.
Then, the second swing support shaft provided with the swing shaft center in the front-rear direction of the one-way operation lever that performs the raising and lowering operation of the scraping reel that is not frequently used is adjusted. Therefore, even if the position of the second oscillating support shaft of the one-way operation lever that performs the raising / lowering operation of the scraping reel that is not frequently operated is changed slightly, there is not much inconvenience, and overall operability and durability It is easy to obtain an excellent support structure.

  In the present invention, the support member is supported by the front wall and the rear wall in a state extending over the front wall and the rear wall of the control tower, and the first swing support shaft side of the second swing support shaft. It is preferable that the other end support member that supports the end portion on the opposite side of the end portion is supported by the lateral wall in the left-right direction of the control tower.

  According to this configuration, the support member is supported by the front wall and the rear wall of the control tower, and supports the end portion of the second swing support shaft opposite to the end portion on the first swing support shaft side. Since the other end support member to be supported is supported by the lateral wall in the left-right direction of the control tower, it is firmly supported at these three locations.

  In the present invention, a side panel is disposed at a lateral side position in the left-right direction of the operation unit, and the side panel is disposed such that a front part is adjacent to a left-right end of the control tower, The side panel is arranged such that the upper surface of the front part is at the same or substantially the same height as the upper part of the control tower, and the rear part is lower than the front part. It is preferable that the upper surface of the intermediate portion between the front portion and the rear portion of the side panel is formed in an inclined surface that is lowered rearward.

According to this configuration, even if the control tower is provided at a relatively high position, the driver who sits on the driver's seat with the rear part of the side panel relatively low can use the operation tools and instruments on the rear part of the side panel. You can make it easier to see.
And in the intermediate part of a side panel, it is easy to perform visual observation from a driver's seat because it is a back-lowering inclined surface.

  In the present invention, it is preferable that a traveling speed change lever is disposed at an intermediate portion of the side panel and a clutch lever of a working portion is disposed at a rear portion of the side panel.

According to this configuration, the travel shift lever that is relatively frequently used is disposed on the inclined surface that is easily lowered by the driver sitting on the driver's seat, and the operability is easily improved.
In addition, the clutch lever of the working section is located at a relatively low position on the side of the driver's seat and can be operated in an easy posture with little risk of an inconvenient posture such as lifting an arm or shoulder. Easy to do.

  In the present invention, a side panel is disposed at a lateral side position in the left-right direction of the operating unit, and a front part is adjacent to the left-right end of the control tower, and on the lateral side of the side panel. It is preferable that a driver seat is disposed, an engine is disposed below the driver seat, and a vertical wall extending in the vertical direction is provided at an end of the side panel on the side far from the engine in the left-right direction. It is.

  According to this configuration, the vertical wall along the vertical direction is provided at the end of the side panel far from the engine in the left-right direction, so that dust and hot air carried on the exhaust from the engine room can be There is little risk of collision with the lateral wall of the feeder located on the lateral side of the panel and bouncing back to the driving unit side.

  In the present invention, it is preferable that a portion of the vertical wall corresponding to the same position as the engine in the front-rear direction is a porous member.

  According to this configuration, the portion corresponding to the same position as the engine in the front-rear direction among the vertical walls along the vertical direction at the end of the side panel far from the engine in the left-right direction is a porous member. Exhaust gas that has passed through the vertical wall is attenuated by the dynamic pressure on the horizontal wall of the feeder at the lateral position, and the exhaust gas that has passed through the vertical wall is unlikely to collide with the horizontal wall of the feeder and bounce off. Therefore, there is little possibility that a lot of dust and hot air will flow into the operation part side.

It is a right view of the whole ordinary combine. It is a top view of the whole ordinary combine. It is a front view which shows an operation lever and an operation linkage mechanism. It is a right view which shows an operation lever and an operation linkage mechanism. It is an arrow view by the VV line direction view in FIG. It is sectional drawing in the VI-VI line in FIG. It is sectional drawing in the VII-VII line in FIG. It is sectional drawing in the VIII-VIII line in FIG. It is a rear view which shows an operation lever and an operation linkage mechanism. It is a disassembled perspective view which shows an operation lever and an operation linkage mechanism. It is a disassembled perspective view which shows the upper part of a control tower. It is a left view which shows a drive part and an operation part. It is an up-down direction sectional view showing a driving part and an operation part. It is a top view which shows an operation part. It is explanatory drawing which shows the comparative example in an operation part. It is a chart which shows the relationship between the output of a hydrostatic continuously variable transmission, and the gear stage of a subtransmission.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the description of the present embodiment, the front-rear direction and the left-right direction are described as follows unless otherwise specified. In other words, the forward traveling direction (see arrow DF in FIG. 2) of the ordinary combine (an example of a harvesting machine) to which the present invention is applied is “forward” and the backward traveling direction (arrow in FIG. 2). DB reference) is “rear”, the direction corresponding to the right side with reference to the forward posture in the front-rear direction (see arrow DR in FIG. 2) is “right”, and similarly the direction corresponding to the left side (arrow DL in FIG. 2) Reference) is “Left”.

〔overall structure〕
1 and 2 show an ordinary combine as an example of a harvester.
The body of this ordinary combine is configured to be self-propelled by mounting a driving part A and a driving part B on the body frame 10 while the body frame 10 is supported on the pair of left and right crawler traveling devices 1. Has been.
On the vehicle body frame 10, a pre-cutting processing device C (corresponding to a cutting unit), a threshing device D, a grain tank E, and an unloader F are provided as crop harvesting working devices.

In a self-propelled airframe (hereinafter abbreviated as a self-propelled airframe), the driving part A is disposed at the right front part of the vehicle body frame 10, and an operating part B is provided above the driving part A. ing. A cutting pretreatment device C is provided at the front left side of the body frame 10 and on the front side of the body frame 10.
In the rear position of the vehicle body frame 10, a full-throw-in type threshing device D to which cereals harvested by the pre-cutting processing device C are fed, and grains (corresponding to crops) supplied from the threshing device D are stored. Glen tank E (corresponding to the crop storage part) to be distributed is arranged on the left and right. An unloader F for discharging the grains stored in the Glen tank E to the outside of the machine is provided at the rear part of the Glen tank E.

In the driving part A, the engine 3 is mounted on the body frame 10, and a box-shaped engine cover 11 that covers the upper side of the engine 3 is provided. On the upper surface side of the engine cover 11, a driver seat 2 of a driver B described later is installed.
An intake case 12 is formed on the lateral outer side of the engine cover 11, and a dust-proof net is stretched on the outer surface side of the intake case 12 for sucking cooling air from the lateral outside.
A mission case 4 for transmitting the driving force from the engine 3 to the left and right crawler traveling devices 1 is provided over the upper and lower sides of the vehicle body frame 10 at the center position of the front portion of the self-propelled aircraft. The transmission case 4 is provided with a hydrostatic continuously variable transmission (not shown) as a main transmission that continuously changes the driving force from the engine 3, and further, a gear transmission as an auxiliary transmission. (Not shown) and a steering clutch (not shown) for interrupting the driving force transmitted to the left and right crawler traveling devices 1 are incorporated.

The pre-cutting processing device C is configured to scrape the tip of the planted culm by rotating the scraping reel 5 and to cut the stock of the culm with the cutter 6. The harvested cereals (reached cereals) are laterally fed by the lateral feed auger 7 and collected near the entrance of the feeder 8. The whole rice cake is fed backward by the feeder 8 and fed into the threshing device D.
Further, the pre-cutting processing device C is configured to be swingable up and down around a horizontal axis (not shown) on the rear end side of the feeder 8. The feeder 8 is swung up and down by an actuator 16 such as a hydraulic cylinder provided over the body frame 10 and the lower portion of the feeder 8. By adjusting the amount of rocking by the operation of the actuator 16, the cutting height of the cereal can be adjusted.

The scraping reel 5 provided at the upper position on the front end side of the feeder 8 is configured to be able to change the height position with respect to the feeder 8 by swinging up and down around the swing support point 5B on the rear end side. Yes. In this way, by changing the relative height of the scraping reel 5 with respect to the feeder 8, the scraping height with respect to the crop to be harvested such as the planted cereal can be changed without changing the cutting height. The change of the height position of the scraping reel 5 is performed by an expansion / contraction operation of a reel lifting / lowering device 5 </ b> A composed of a hydraulic cylinder interposed between the upper portion of the feeder 8.
The raising / lowering operation with respect to the reel raising / lowering device 5A is performed in accordance with the forward / backward swing of a reel raising / lowering lever 14 described later.

The threshing device D is an axial flow type cylinder (not shown) that is driven and rotated around the axial center of the posture along the front-rear direction of the self-propelled machine body so as to perform the handling process of the harvested cereal grains supplied to the handling room. And a sorting device (not shown) for sorting the grains from the processed product obtained by the handling process.
In this sorter, the first of the sorted grains is supplied to the Glen tank E by a cerealing device (not shown), and the second is handled by a second reducing device (not shown). Is returned to the handling chamber (not shown) in which the swirl is turned, and swarf and the like other than the grains are dropped and released from the rear part of the sorting processing apparatus to the rear of the self-propelled machine body.

  Glen tank E is provided with tank main part 9 for storing the grain supplied from a grain raising device. The tank body 9 can be switched between a work posture stored entirely in the self-propelled vehicle body and an inspection posture projecting laterally from the self-propelled vehicle body by turning around the vertical axis Y at the rear position. It is supported. The vertical axis Y is configured to coincide with the cylinder axis of the vertical transfer cylinder 18 provided in the unloader F provided on the rear surface side of the tank body 9.

The unloader F includes a straight tubular vertical transport cylinder 18 erected upward, and a horizontal transport cylinder 19 extending from the upper end of the vertical transport cylinder 18 along the horizontal direction. The vertical transfer cylinder 18 is provided so as to be able to swing left and right around the vertical axis Y, and the horizontal transfer cylinder 19 is provided so as to be able to swing up and down around the horizontal horizontal axis X, together with the vertical transfer cylinder 18 around the vertical axis Y. It can be swung left and right.
Each of the vertical conveyance cylinder 18 and the horizontal conveyance cylinder 19 is configured by a well-known screw-type conveyance device in which a conveyance screw is internally provided.

[Operation section]
The operation part B is configured as follows.
A driver's seat 2 is mounted and installed on the upper surface side of the engine cover 11, and a control tower 20 is erected on the front side of the driver seat 2 with a driver unit step 15 interposed therebetween.
On the upper surface 21 side of the control tower 20, a two-way operation lever 13 that also serves as an operation tool that performs steering control of the self-propelled aircraft and an operation tool that performs lifting control of the pre-cutting processing device C, and a swing operation in the front-rear direction Thus, a reel raising / lowering lever 14 (corresponding to a one-way operation lever) for raising and lowering the scraping reel 5 with respect to the cutter 6 is provided in a state of being aligned in the left-right direction.

As shown in FIG. 3, the two-way operation lever 13 is maintained at a neutral position N that assumes an upright posture in a non-operation state. It is configured to be swingable in the left-right direction so that the left turn position L and the right turn position R can be operated with the neutral position N as a reference.
When the two-way operation lever 13 is swung in the left-right direction, the operation arm of the steering control valve V1 is pushed and pulled via a first operation linkage mechanism H1 described later. As the steering control valve V1 is switched, the steering clutch built in the mission case 4 is controlled to be turned on and off, and the steering (turning) of the self-propelled aircraft is realized.
Further, by operating the two-way control lever 13 in the front-rear direction, the lifting control valve V2 (corresponding to a control valve, see FIG. 3) that controls the actuator 16 described above is operated to raise and lower the cutting pretreatment device C. Can be realized.

As shown in FIGS. 3 to 5, a reel lifting / lowering lever 14 (corresponding to a one-way operation lever) provided on the upper surface side of the control tower 20 lifts and lowers the scraping reel 5 by a swinging operation in the front-rear direction. It is configured to perform operations.
That is, when the reel lifting / lowering lever 14 is swung in the front / rear direction, the lifting / lowering control valve V3 (corresponding to a control valve) for controlling the reel lifting / lowering device 5A is operated via a second operation linkage mechanism H2 described later. The raising and lowering operation of the scraping reel 5 is performed.

  As shown in FIGS. 12 and 14, a side panel 30 extending from the left lateral end position of the control tower 20 toward the rear side is provided on the left side portion of the driver seat 2. Of the upper surface 31 of the side panel 30, a front upper surface 31A located on the front side is provided with a main transmission lever 33 and a sub transmission lever 34 as traveling transmission levers for controlling the traveling speed of the self-propelled aircraft. ing.

And among the upper surfaces 31 of the side panels 30, the rear upper surface 31B located on the rear side has a threshing clutch lever 35 as a clutch lever of the working unit at a position rearward of the main transmission lever 33 and the auxiliary transmission lever 34. The reaping clutch lever 36 is provided in a state where it is arranged side by side.
The threshing clutch lever 35 is configured to perform an on / off operation of a threshing clutch (not shown) in the threshing device D by a forward / backward swing operation of the threshing clutch lever 35. The harvesting clutch lever 36 is configured to perform an on / off operation of a harvesting clutch (not shown) in the pre-harvest processing device C by a swinging operation of the harvesting clutch lever 36.

  Further, on the side panel 30, an accelerator that controls the rotational speed of the engine 3 is located behind the main transmission lever 33 and the auxiliary transmission lever 34 and ahead of the threshing clutch lever 35 and the cutting clutch lever 36. A lever 38 is provided.

The side panel 30 is located on the left lateral side of the driver seat 2, and the front portion is located adjacent to the left and right end portions of the control tower 20.
Of the upper surface 31 of the side panel 30, the upper surface 31 of the side panel 30 is at the same or substantially the same height as the upper portion of the control tower 20 at the front end position adjacent to the left and right end of the control tower 20. The rear upper surface 31B is provided along a horizontal or substantially horizontal direction at a height position lower than the front upper surface 31A.
For this reason, among the upper surface 31 of the side panel 30, the front upper surface 31A located at the intermediate portion between the front end portion of the side panel 30 and the rear upper surface 31B is formed in an inclined surface that is lowered rearward. Therefore, the main speed change lever 33 and the sub speed change lever 34 are provided in a state of projecting to the upper side of the rearwardly inclined surface (see FIG. 12).

  As shown in FIG. 12, the threshing clutch lever 35 and the reaping clutch lever 36 provided on the rear upper surface 31B are bent substantially in an L shape when viewed from the side, and are pivoted on the lower side of the rear upper surface 31B. It is pivotally supported and is provided so that it can swing back and forth. That is, the posture can be changed from the clutch-engaged state having a substantially standing posture shown by a solid line to a clutch-disengaged state having a substantially lying posture as shown by a virtual line in the drawing. At this time, the threshing clutch lever 35 so that the gripping portions 35a, 36a of the threshing clutch lever 35 and the reaping clutch lever 36, whose postures are changed to the clutch disengaged state, are stopped at a position separated from the rear upper surface 31B by a predetermined distance d1. The swinging operation range of the cutting clutch lever 36 is determined.

[Operation linkage mechanism]
3 to 10, a two-way operation lever 13 that performs the lifting control of the cutting pretreatment device C and the steering control of the self-propelled machine body, and a reel lifting lever 14 that performs the lifting operation of the scraping reel 5 (one-way operation). Corresponding to the lever).
The forward / backward and left / right swinging operation of the two-way operation lever 13 is performed through a first operation linkage mechanism H1 configured as follows, and a steering control valve V1 as a steering drive unit. And has been communicated to.
Further, the swinging operation of the reel lifting lever 14 in the front-rear direction is transmitted to the lifting control valve V3 via a second operation linkage mechanism H2 described later.

[First operation linkage mechanism]
The first operation linkage mechanism H1 is configured as follows.
The two-way operation lever 13 erected on the upper surface side of the control tower 20 is moved up and down and left and right through a first operation linkage mechanism H1 disposed inside the control tower 20. It is configured to transmit to the control valve V2 and the steering control valve V1.
As shown in FIGS. 3 to 10, the first operation linkage mechanism H <b> 1 includes a lever support frame 50 fixed inside the control tower 20 and a shaft support member 60 supported by the lever support frame 50. Yes. The shaft support member 60 includes a first shaft portion 61 (corresponding to a first swing support shaft) having a one-way swing axis y1 that supports the two-way operation lever 13 so as to be swingable, and the two directions And a second shaft portion 62 that supports the operation lever 13 so as to be swingable about the swing axis x1 in the other direction.
Of the two swing axes x1 and y1, the swing axis y1 in one direction along the left-right direction of the self-propelled machine body is the axis of the swing operation in the front-rear direction of the two-way operation lever 13, and The swing axis x1 in the other direction along the front-rear direction of the traveling machine body is the axis of the swing operation of the two-way operation lever 13 in the left-right direction.

<Mounting bracket>
As shown in FIG. 3 to FIG. 6 and FIG. 8 to FIG. 11, a pair of right and left is provided across the walls of the front wall 20F and the rear wall 20B of the control tower 20 below the upper surface 21 of the control tower 20. The mounting brackets 22 and 23 are fixed by welding.
However, in this structure, as shown in FIGS. 4 to 6 and 11, a front mounting plate 26 having an L-shaped cross section is welded and fixed to the inner surface side of the front wall 20F, and the inner surface side of the rear wall 20B. Since the rear mounting plate 27 having a gate shape in plan view is fixed by welding, the mounting brackets 22 and 23 are fixed by welding over the front mounting plate 26 and the rear mounting plate 27.
Upper wall portions 50U provided on the left and right sides of the lever support frame 50 are bolted to the mounting brackets 22 and 23, and the lever support frame 50 is fixed to the control tower 20.

  Of the mounting brackets 22 and 23, the right mounting bracket 22 (corresponding to the support member) located on the right side is a lever support, as shown in FIGS. 3 to 6 and FIGS. A horizontal plate surface 22a (corresponding to a horizontal portion) that contacts the upper wall portion 50U of the frame 50, and a vertical plate surface 22b (corresponding to a vertical portion) bent downward from the right lateral end of the horizontal plate surface 22a. And a rising plate surface 22c that is bent upward from the left lateral end of the horizontal plate surface 22a, and is formed in a crank shape in cross section.

  A fixing nut 22d is welded and fixed to the right mounting bracket 22 at a location near the rising plate surface 22c on the left lateral side of the horizontal plate surface 22a. Therefore, the connecting bolt 24 is inserted into the connecting hole 50a formed in the upper wall portion 50U on the right side, and is screwed into the fixing nut 22d, thereby connecting the right side of the upper wall portion 50U to the right mounting bracket 22. Can be supported.

Further, a connecting hole 22e is formed in the vertical plate surface 22b bent downward from the right lateral end of the horizontal plate surface 22a (see FIGS. 10 and 11).
The connection hole 22e is for connecting and fixing the attachment plate 43 that supports one end of the reel side support shaft portion 40 (corresponding to the second swing support shaft) with a connection bolt 44. A fixing nut portion 44a to be screwed is provided.
The reel-side support shaft portion 40 has an axis y4 when the reel elevating lever 14 swings in the front-rear direction. The mounting plate 43 is formed with a pivot hole 43a that fits into one end of the reel side spindle 40 and a support hole 43b through which the connecting bolt 44 is inserted.
The support hole 43b of the mounting plate 43 is formed as a so-called fool hole having an inner diameter slightly larger than the diameter of the connecting bolt 44 inserted through the support hole 43b. Accordingly, it is possible to adjust the relative position between the support hole 43b and the connection bolt 44 by utilizing the flexibility within the range corresponding to the difference between the inner diameter of the support hole 43b and the outer diameter of the connection bolt 44.

  Of the mounting brackets 22, 23, the left mounting bracket 23, which is located closer to the center of the body in the left-right direction than the right mounting bracket 22, is a horizontal plate surface 23 a (horizontal surface) that abuts the upper wall portion 50 U of the lever support frame 50. And a rising plate surface 23c bent upward from the left lateral end of the horizontal plate surface 23a, and is formed in an L-shaped cross section.

  The left mounting bracket 23 extends between the front and rear walls of the control tower 20 at a position close to the end of the lever support frame 50 opposite to the end supported by the right mounting bracket 22. Thus, the front side mounting plate 26 and the rear side mounting plate 27 are fixed by welding. A fixing nut 23 d is also provided on the horizontal plate surface 23 a of the left mounting bracket 23. By inserting the connecting bolt 25 into the connecting hole 50a provided near the left end of the upper wall portion 50U of the lever support frame 50 from below and screwing it into the fixing nut 23d, The left side of the wall portion 50U can be connected to and supported by the left mounting bracket 23.

The end of the reel side spindle 40 opposite to the side pivotally supported by the mounting plate 43 is supported by a right lateral wall 20R (corresponding to a lateral wall) in the left-right direction of the control tower 20.
That is, as shown in FIGS. 3 and 11, a channel-shaped fixing bracket 46 (corresponding to the other end support member) is welded and fixed to the right lateral wall 20 </ b> R when viewed in the front-rear direction. A shaft mounting plate 45 is connected to the left end of the fixed bracket 46 by bolts.
As shown in FIGS. 3 and 10, the shaft mounting plate 45 includes a pivot support hole 45 a that is fitted around the end of the reel-side support shaft portion 40 at the central portion in the vertical direction. Connecting holes 45b and 45b are provided at two locations in the upper and lower positions that are separated in the direction.
The pivot support hole 45a is a pivot support hole that is tightly fitted around the reel side support shaft portion 40. The upper and lower pivot support holes 45a are each formed as a long hole having a long diameter in the vertical direction. Accordingly, it is possible to adjust the vertical position of the shaft mounting plate 45 with respect to the fixed bracket 46, and it is possible to adjust the vertical position of the reel-side support shaft portion 40 with respect to the right lateral wall 20R of the control tower 20.

<Lever support frame>
As shown in FIGS. 3 to 10, the lever support frame 50 includes a rear wall 50B located on the rear side in the front-rear direction, a right wall 50R located on the right side in the left-right direction, and a left wall 50L located on the left side. And is formed in a gate shape in plan view. The right side wall 50R and the left side wall 50L are welded and fixed over the rear wall 50B and the upper wall portion 50U, respectively, to enhance the shape retaining strength of the entire lever support frame 50. The lever support frame 50 is made of a sheet metal material, and the upper wall portion 50U is made of a material integral with the portion constituting the rear wall 50B, and is bent forward at the upper portions on both the left and right sides of the rear wall 50B. The part 50U is configured to face upward.

The right side wall 50R has a cylindrical boss-like bearing portion 51 that is opposed to one end side in the axial direction of the first shaft portion 61 and pivotally supports the shaft end portion of the first shaft portion 61. It is formed in a state of projecting to the right lateral outer side (left side in FIG. 3). As with the bearing portion 51, a fixed locking pin 52 is formed on the lateral outer side of the right side wall 50R.
The fixed locking pin 52 is locked by the lifting / returning spring 76 during lifting when the lifting / returning spring 76 described later is attached to the bearing portion 51, and the two-way operation lever 13 operated in the front-rear direction is neutral. This is for urging return to the position N.

  The left side wall 50L is provided with a connecting portion 53 for supporting the other end side of the first shaft portion 61 in the axial direction. The connecting portion 53 is formed by fixing fixing nuts 53a and 53a by welding, and a connecting member 65 attached to the first shaft portion 61 of the shaft support member 60 is connected to the connecting portion 53 on the left side wall 50L. It is mounted via two connecting bolts 53b, 53b in a state of being applied from the lateral outer side.

As shown in FIGS. 7, 9, and 10, the rear wall 50 </ b> B of the lever support frame 50 has a one-way swing range of the two-way operation lever 13 in the front-rear direction and the left-right direction. A restricting portion 55 that restricts the swing range within a predetermined range is provided.
The restricting portion 55 is configured by a substantially rectangular opening formed in the rear wall 50B so that the swing range in the front-rear direction of the two-way operation lever 13 is set to a predetermined angle range. That is, as shown in FIG. 7, of the shaft support member 60 pivotally supported by the lever support frame 50, the first shaft portion 61 swings with the swing of the two-way operation lever 13 in the front-rear direction. A portion of the second shaft portion 62 that rotates about the axis y1 is disposed in a state of entering the opening of the restricting portion 55. For this reason, the swing range of the second shaft portion 62 that swings around the swing axis y1 of the first shaft portion 61 is the second shaft portion 62 and the restricting portion 55, as indicated by phantom lines in FIG. It is limited by the contact with the opening edge of.

<Shaft support member>
The shaft support member 60 includes a first shaft portion 61 having a one-way swing axis y1 in the front-rear direction and the left-right direction of the two-way operation lever 13, and the front-rear direction and the left-right direction of the operation lever. And a second shaft portion 62 having a swing axis x1 in the other direction.
The 1st axial part 61 and the 2nd axial part 62 are being fixed by the common holding frame 63 so that each axis | shaft may be connected by the intermediate part in an axial length direction. The first shaft portion 61 and the second shaft portion 62 are positioned so as to cross each other on the upper side and the lower side, and the second shaft portion 62 facing in the front-rear direction on the upper side of the holding frame 63 is fixed. In addition, a first shaft portion 61 facing in the left-right direction is fixed on the lower side of the holding frame 63.

The first shaft portion 61 includes, on the right end side thereof, a bearing portion 61a that is inserted into and removed from a cylindrical boss-shaped bearing portion 51 provided on the right side wall 50R of the lever support frame 50. As a result, the right end side of the first shaft portion 61 is pivotally supported by the lever support frame 50.
The left end side of the first shaft portion 61 is connected to the left side wall 50 </ b> L of the lever support frame 50 via a connecting member 65 sandwiched between a pair of flange portions 61 b and 61 b provided near the left end side of the first shaft portion 61. It is supported by the connection part 53 provided in this.
At this time, the connecting member 65 is bolted to the connecting portion 53 and completely fixed at one end of the connecting member 65 that is the side connected to the connecting portion 53. At the other end of the connecting member 65 that is connected to the first shaft portion 61, the connecting member 65 sandwiched between the pair of flange portions 61b and 61b and the first shaft portion 61 are relatively rotatable. In this state, the first shaft portion 61 is supported. Accordingly, the first shaft portion 61 is supported by the connecting member 65 in a state where movement in the axial direction, the front-rear direction, and the up-down direction is restricted.

On the right end side of the first shaft portion 61, a first operation plate 64 is integrally attached to the first shaft portion 61 at a position located on the inner side of the right side wall 50 </ b> R of the lever support frame 50. The bearing portion 61a is provided integrally with the first shaft portion 61 so as to protrude further laterally outward than the laterally outward surface of the first operation plate 64, and the bearing portion 61a is supported by a lever. The first operation plate 64 is located on the inner side of the right side wall 50R in a state where it is inserted into the bearing portion 51 of the frame 50.
Thus, the cylindrical boss-shaped bearing portion 51 that pivotally supports the shaft end portion of the first shaft portion 61 protrudes laterally outside (the left side in FIG. 3) of the right side wall 50R, and the first operation plate 64 is the right side wall. Positioned on the inner side of 50R, the connecting member 65 is configured to be connectable in a state of being applied from the left lateral side of the left side wall 50L (the right side of the left side wall 50L in FIG. 3). Therefore, the shaft support member 60 is easily assembled by connecting the connecting member 65 and the connecting portion 53 to the lever support frame 50 from the left side by using the connecting bolts 53b and 53b. Can do.

As shown in FIGS. 3 to 6, the first operation plate 64 extends longer than the right side wall 50 </ b> R. A movable locking pin 64a extends from the first operation plate 64 to the laterally outer side of the right side wall 50R beyond the lower end edge of the right side wall 50R at the lower part of the first operation plate 64 extended to the lower side. Is erected. As shown in FIGS. 3 to 6, the movable locking pin 64 a is provided so as to be locked to the raising / lowering return spring 76 when the raising / lowering raising spring 76 is attached to the bearing portion 51. .
Therefore, with respect to the raising / lowering return spring 76 attached to the bearing portion 51, the fixed locking pin 52 formed to protrude laterally outside the right side wall 50 </ b> R of the lever support frame 50 and the first shaft portion 61. A movable locking pin 64a erected so as to protrude laterally outward from the operation plate 64 is locked.

  When the two-way operation lever 13 is swung in the front-rear direction in this state, the movable locking pin 64a is moved back and forth during the up-and-down movement as the first operation plate 64 is swung as shown by a virtual line in FIG. One end side of 76 is moved to the side away from the fixed locking pin 52. At this time, since the other end side of the vertical return spring 76 is locked to the fixed locking pin 52 and does not move, the movable locking pin 64a is moved closer to the fixed locking pin 52 in the two-way operation lever 13. The urging force of the vertical return spring 76 that is elastically urged toward the front is applied. Thereby, the two-way operation lever 13 is configured to return to the neutral position when the hand is released.

The limit of the swing operation range in the front-rear direction of the two-way operation lever 13 at this time is the state where the restriction portion 55 formed on the lever support frame 50 and the restriction portion 55 are inserted as shown in FIG. This is performed by contact with the second shaft portion 62.
In addition, the two-way operation lever 13 and the first shaft portion 61 serving as the swing axis y1 in the front-rear direction are in two directions in a neutral posture at a position close to a vertical line passing through the swing axis y1. The operation lever 13 is disposed in a state of being associated with each other so that a slimming portion exists.

On the right end side of the first shaft portion 61, at a position located on the inner side of the right side wall 50 </ b> R of the lever support frame 50, it is closer to the swing axis x <b> 1 of the second shaft portion 62 than the first operation plate 64. The operation arm 67 is fixed. The operation arm 67 is extended in a posture in which the free end side is directed forward while the two-way operation lever 13 is operated to the neutral position, and the operation rod 68 is inserted into the connecting hole 67a provided near the extension end. One end is connected.
The other end of the operation rod 68 is linked to a lift control valve V2 that controls the operation of the actuator 16. Therefore, the actuator 16 can be operated in accordance with the back-and-forth swing operation around the swing axis y1 of the two-way operation lever 13, and the cutting pre-treatment device C can be moved up and down.

As shown in FIGS. 3, 9, and 10, the left end side of the first shaft portion 61 is positioned further to the left end side than the location where the connecting member 65 sandwiched between the pair of flange portions 61 b and 61 b exists. A second operation plate 66 is attached.
At the lower end portion of the second operation plate 66, a notch portion 66a for holding an operation wire 82 provided so as to link the steering control valve V1 and the two-way operation lever 13 is formed. The operation wire 82 is composed of a push-pull wire in which the inner wire portion is inserted in the outer wire portion so as to be relatively slidable, and one end side of the inner wire portion transmits a swing operation of the two-way operation lever 13 to be described later. And the outer wire portion is held in the notched portion 66a.
Thus, by supporting the middle part of the operation wire 82 with the second operation plate 66, the operation of the operation wire 82 by the output operation body 71 can be facilitated smoothly.

  At the intermediate position between the first operation plate 64 and the connecting member 65 of the first shaft portion 61, the left and right side portions of the channel-shaped holding frame body 63 whose front side is opened in plan view are fixed by welding and integrated. ing. And the 2nd axial part 62 which made the axial center along the front-back direction cross | intersects with the said 1st axial part 61 penetrates the holding | maintenance frame 63 back and forth above the said 1st axial part 61. It is provided in the state. That is, the upper and lower first shaft portions 61 and the second shaft portion 62 are integrated with each other through the holding frame 63 so as to be orthogonal to each other.

The second shaft portion 62 has a pivot portion 62 </ b> A on which the two-way operation lever 13 is pivoted positioned on the front side of the holding frame body 63 and an extension shaft portion 62 </ b> B on the rear side of the holding frame body 63. It is a thing.
The extension shaft portion 62 </ b> B toward the rear side is configured to engage with a restriction portion 55 formed on the lever support frame 50. Further, a steering neutral return spring 75 is wound around the extension shaft portion 62B. At both ends of the steering neutral return spring 75, a neutral regulating pin 63A projecting rearward from the holding frame 63, and an operation shaft 72 of the operation bracket 70 to be described later, the rearward from the operation bracket 70 is provided. The operation shaft 72 projecting from the shaft is locked.

  As shown in FIGS. 7 and 10, a boss portion of a rectangular plate-shaped operation bracket 70 formed integrally with the two-way operation lever 13 on the side close to the holding frame 63 is provided on the pivot portion 62A on the front side. 70A is externally fitted. On the side far from the holding frame 63, a boss portion 71 </ b> A (corresponding to a cylindrical shaft portion) of the rectangular plate-shaped output operation body 71 located on the front side of the operation bracket 70 is fitted on the second shaft portion 62. The operation bracket 70 and the output operation body 71 are supported so as to be relatively rotatable around the swing axis x1 that is the axis of the second shaft portion 62.

The operation bracket 70 integral with the two-way operation lever 13 is positioned below the first shaft portion 61 and has an axial center x2 along the front-rear direction parallel to the swing axis x1 of the second shaft portion 62. The operation shaft 72 having the above is welded and integrated so as to penetrate the operation bracket 70 forward and backward.
The operation shaft 72 includes an operation shaft 72 portion (corresponding to a locking body) projecting forward from the operation bracket 70 and an operation shaft 72 portion (corresponding to a protruding member) projecting rearward from the operation bracket 70. ).
An operation shaft 72 portion projecting forward is inserted into an operation opening 71C of an output operation body 71 described later, and an operation shaft 72 portion projecting rearward is formed on a holding frame 63, which will be described later. Is inserted into the restriction opening 63B.

The output operation body 71 includes a boss portion 71A that fits around the second shaft portion 62, and a plate-like swing plate portion 71B that is integrally attached to the boss portion 71A. An operation opening 71C into which the operation shaft 72 is inserted is provided. Further, a locking pin 73 (corresponding to a spring locking portion) is provided below the swinging plate portion 71B in a state of being positioned below the operation opening 71C. Similar to the second shaft portion 62 and the operation shaft 72, the locking pin 73 is directed in the direction along the front-rear direction and protrudes from the front and rear sides of the output operation body 71 to the swing plate portion 71B. It is fixed by welding.
Then, a coil spring 74 as an elastic body is wound around the boss portion 71A on the front side of the swing plate portion 71B, and each end portion on both ends of the coil spring 74 is inserted into the operation opening 71C. The operation shaft 72 facing forward and the left and right sides of the locking pin 73 are mounted so as to be distributed.

As shown in FIGS. 3, 7, and 10, an operation wire 82 is detachably connected to the locking pin 73 protruding to the rear side of the swing plate portion 71 </ b> B. As shown in FIG. 3, the operation wire 82 is linked to the steering control valve V <b> 1, and can be used to swing the bi-directional operation lever 13 in the left-right direction, that is, about the swing axis x <b> 1 of the second shaft portion 62. The steering control valve V1 is switched in conjunction with each other, and the steering clutch of the travel device (not shown) is operated separately on the left and right sides so that the turning operation of the aircraft is performed.
As described above, the operation wire 82 provided to link the steering control valve V1 and the two-way operation lever 13 and the left-right direction of the two-way operation lever 13 in the first operation linkage mechanism H1, that is, the second axis. The steering unit U1 is constituted by the second shaft portion 62, the output operation body 71, and the like that transmit the swing operation of the portion 62 about the swing axis x1 to the operation wire 82.

Between the two-way operation lever 13 and the output operation body 71 in the steering unit U1, the state in which the output operation body 71 moves integrally following the swing operation of the two-way operation lever 13 and the two-way operation A certain degree of flexibility is provided so that the output operating body 71 does not follow the lever 13 integrally and allows the two-way operating lever 13 to swing independently. .
The accommodation is configured by the operation opening 71C formed in the swing plate portion 71B and the difference in diameter between the inner diameter of the operation opening 71C and the outer diameter of the operation shaft 72.

[Second operation linkage mechanism]
The second operation linkage mechanism H2 that performs the swinging operation of the reel lifting lever 14 in the front-rear direction is configured as follows.
As shown in FIG. 3 to FIG. 5, FIG. 9, and FIG. 10, the reel elevating lever 14 has a strip-like shape in which the lower end side bent in a U shape is welded and fixed to the reel side support shaft portion 40. It is composed of members. A plate-like operation arm 41 is also fixed to the reel side spindle 40 by welding.
The operation arm 41 is extended in a posture in which the free end side is directed forward while the reel raising / lowering lever 14 is operated to the neutral position, and one end of the operation rod 42 is inserted into the connection hole 41a provided near the extension end. Are connected. The other end of the operation rod 42 is linked to a lifting control valve V3 that controls the operation of the reel lifting device 5A.
Therefore, the reel lifting / lowering device 5A is operated in accordance with the swing operation of the reel lifting / lowering lever 14 around the axis y4 of the reel-side support shaft portion 40, and the height position of the scraping reel 5 with respect to the pre-cutting processing device C is determined. Can be changed.

The reel-side support shaft portion 40 that supports the reel lifting / lowering lever 14 and the first shaft portion 61 that supports the two-way operation lever 13 are aligned in the left-right direction with their respective axis centers y4, y1 along the left-right direction. However, they are not arranged concentrically.
That is, the axis y4 of the reel-side support shaft portion 40 is at a position shifted slightly below the swing axis y1 of the first shaft portion 61 in the vertical direction. Even in the front-rear direction, the axis y4 of the reel-side support shaft portion 40 is disposed at a position slightly shifted forward from the swing axis y1 of the first shaft portion 61. With this positional relationship, the reel-side support shaft portion 40 and the first shaft portion 61 are attached to the control tower 20 by the mounting brackets 22 and 23.

The lift control valve V3 that controls the operation of the reel lifting device 5A and the lift control valve V2 that controls the operation of the actuator 16 that performs the lifting operation of the pre-cutting device C are a common valve block VB (corresponding to a valve unit). Built in. The valve block VB can be mounted in the control tower 20 by changing its mounting position to the front, back, left, right, or up and down.
By changing the position of the valve block VB, the positions of the elevation control valve V3 and the elevation control valve V2 can be simultaneously changed at once.

[Structure of prime mover]
As shown in FIGS. 12 and 13, in the driving section A, the intake case 12 is provided on the right lateral outer side of the engine cover 11, and the side panel 30 is provided on the left lateral side of the engine cover 11.
Inside the engine cover 11, a radiator 17 and an intake fan 17 </ b> A are provided outside the right side of the engine 3. The outside air sucked through the intake case 12 and the radiator 17 is forcibly blown from the right to the left as cooling air in the engine room by the intake fan 17A.

The air blown by the intake fan 17A is discharged from the left side to the outside in the rear part of the side panel 30 through the inside of the engine room. There is a feeder 8 that conveys the harvested harvest toward the threshing device D.
Since there is an appropriate gap between the left lateral surface of the side panel 30 and the right lateral surface of the feeder 8, there is no problem unless the air blow by the intake fan 17A is so strong, but the engine 3 itself is large and has a strong output. Or when the work load is relatively large and the output of the engine 3 is increased, the air blown from the intake fan 17A blown out at a high speed is sent to the right side of the feeder 8. It may collide with the side and bounce back to the upper driver B side.

Therefore, a vertical wall 32 extending in the vertical direction is provided at the end of the side panel 30 on the side far from the engine 3 in the left-right direction, and the vertical wall 32 passes through the vertical fan 32 while being restricted by the intake fan 17A. It is made of a punching metal (corresponding to a porous member) in which a large number of small holes for ventilation are formed.
Thereby, there is little possibility that the air blown by the intake fan 17A directly collides with the right lateral surface of the feeder 8 and rebounds at a high speed. And compared with what the vertical wall 32 is non-porous, there is little possibility that hot air may stay in an engine room.

The range where the small holes for ventilation are formed in the vertical wall 32 may be the entire vertical wall 32, or may be only a portion corresponding to the same position as the position where the engine 3 exists in the front-rear direction. .
That is, the intake fan 17A and the engine 3 are substantially at the same position in the front-rear direction, and the air blowing direction of the intake fan 17A is directed to the direction in which the engine 3 exists. Therefore, the range in which the small holes for ventilation are formed may also be a range corresponding to the same position or substantially the same position in the front-rear direction as the position where the engine 3 exists.

[Others]
FIG. 15 is an explanatory diagram for comparison in which two types of driving units B having different positions of the driving unit step 15 and the shape of the side panel 30 are indicated by a solid line and a two-dot chain line.
First, the operation part B having a shape described by a two-dot chain line in FIG. 15 will be described.
In this operation part B, the positions of the operation part step 15 and the step lower surface 15U are set to relatively low positions. The bottom surface 20U of the control tower 20 is attached to the operation unit step 15 at a position lower than the upper surface of the operation unit step 15.
And the upper surface 31 of the side panel 30 is formed in the flat surface along the horizontal or substantially horizontal direction in the height position comparable as the rear end position following the rear end position of the control tower 20 as a whole. .

Next, the operation part B having the shape indicated by the solid line in FIG. 15 will be described.
In this operation part B, the position of the step lower surface 15U in the operation part step 15 is made higher by the height difference h1 than that of the shape described by the two-dot chain line. And the upper surface of the operation part step 15 does not have a low step part like the structure of the comparative example shown by the above-mentioned two-dot chain line, and the whole is formed with a flat surface, and the bottom surface 20U of the control tower 20 is mounted thereon. Has been. The upper surface of the operation unit step 15 is made higher by a height difference h2 than that of the shape described by the two-dot chain line.
As a result, the upper end portion of the control tower 20 is considerably higher than the structure of the comparative example. However, the upper surface 31 of the side panel 30 is not formed entirely as a flat surface along the horizontal or substantially horizontal direction, but is formed in different shapes at the front side portion and the rear side portion thereof.
That is, among the upper surfaces 31 of the side panels 30, the front upper surface 31 </ b> A that continues to the position of the upper rear end of the control tower 20 is formed as an inclined surface that descends from the rear end of the control tower 20 along the upper surface of the control tower 20. Further, a rear upper surface 31B continuing to the rear is formed on a flat surface along the horizontal or substantially horizontal direction. The rear upper surface 31B is higher than the upper surface 31 of the side panel 30 in the structure of the comparative example by a height difference h3.

As described above, the operation part B having the shape described by the solid line is slightly raised as a whole as compared with the case where the operation part B having the shape described by the two-dot chain line is adopted, and the operation part B of the upper surface 31 of the side panel 30 is The height is also slightly higher. The distance from the upper surface of the driving unit step 15 to the rear upper surface 31B of the side panel 30 hardly changes.
The operation part B having the shape indicated by the solid line in FIG. 15 has a structure corresponding to the operation part B of the present invention.
In this structure, when the engine 3 mounted on the vehicle body frame 10 is enlarged or the transmission case 4 is enlarged, the position of the step lower surface 15U in the driving unit step 15 is raised to ensure a high ground clearance. Easy to use. For example, even if the ground height of the step lower surface 15U is increased, it is effective in the case where the positions of various operation tools provided on the upper surface 31 of the side panel 30 and the height of the driver's seat 2 are not desired to be too high. is there.
That is, in the driving unit B of the comparative example described by the two-dot chain line, compared to the case where the position of the driving unit step 15 and the shape of the side panel 30 part are adopted, in the driving unit B of the shape described by the solid line, When the position of the driving unit step 15 and the shape of the side panel 30 portion are adopted, the rear part of the side panel 30 is compared with the height difference h1 between the step lower surfaces 15U and the height difference h2 between the upper surfaces of the driving unit step 15. The height difference h3 on the upper surface 31B is advantageous because it is very small.

In addition, when the capacity of the hydrostatic continuously variable transmission used as a main transmission for traveling is increased when the engine 3 and the transmission case 4 are increased in size, an advantageous transmission can be easily obtained in the following points.
In other words, it is known that the hydrostatic continuously variable transmission device is used more efficiently when it is used in a relatively high speed range with a larger swash plate angle. Therefore, in a general harvesting machine, in combination with the gear-type sub-transmission in the mission case 4, the “road traveling speed” that is a high speed range, the “normal work traveling speed” that is a medium speed range, and the low speed range. Three types of travel modes, such as a certain “lodging work travel speed”, are displayed.

In this structure, the hydrostatic continuously variable transmission is used at, for example, the highest speed (100% output), and the gear-type sub-transmission is suitable for a low speed suitable for “inclination work travel speed” and “normal work travel speed”. In addition, it is used by switching between three stages, a medium speed and a high speed suitable for the “road speed on the road”.
However, if the output of the engine 3 and the capacity of the hydrostatic continuously variable transmission are sufficient with respect to the overall size of the harvester, as shown in FIG. In combination with the gear-type sub-transmission device, a simple and small structure that can switch the gear-type sub-transmission device in two stages can be adopted.

The table in FIG. 16 shows that the hydrostatic continuously variable transmission is selectively used for medium speed (for example, 50% output) and for example, maximum speed (100% output), and for standard speed (first speed) and high speed (second speed). The output state of the traveling speed when used in combination with a gear-type sub-transmission device capable of shifting in two stages is shown. As shown in this table, using a hydrostatic continuously variable transmission with ample capacity and a gear-type sub-transmission that can be shifted in two stages, the `` falling work travel speed '' that is the low speed range and the medium speed Three types of travel modes, the “normal work travel speed” which is a region and the “road travel speed” which is a high speed region, can be made to appear.
As a result, the gear type auxiliary transmission can be easily reduced in size and simplified.

[Other Embodiment 1]
In the said embodiment, it is comprised so that the raising / lowering operation of the cutting pretreatment apparatus C may be performed by operating the two-way operation lever 13 in the front-rear direction, and the self-propelled aircraft may be operated by operating the two-way operation lever 13 in the left-right direction. Although the structure is shown, the present invention is not limited to this.
For example, a structure in which the lifting and lowering operation of the cutting pretreatment device C is performed by the left-right operation of the two-way operation lever 13 and the steering operation of the self-propelled aircraft is performed by the front-and-rear operation of the two-way operation lever 13 is performed. It can be a thing.
Other configurations may be the same as those in the above-described embodiment.

[Second embodiment]
In the said embodiment, although the front part of the side panel 30 illustrated the thing connected to the rear end side with respect to the left-right direction edge part of the control tower 20 in the operation part B, it was restricted to this structure. It is not a thing.
For example, although not shown in the figure, the structure may be adjacent to the left and right end portions of the control tower 20 so that the front portion of the side panel 30 is positioned laterally outside in the left and right direction of the control tower. Good.
In addition, the control tower 20 and the side panel 30 are not limited to a structure connected to each other, and may be arranged with some space therebetween.
Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the above embodiment, in the support member, the lever support frame 50 on which the first shaft portion 61 of the two-way operation lever 13 is supported is fixed to the horizontal plate surface 22a of the right mounting bracket 22, and the reel of the reel elevating lever 14 is fixed. Although the structure of the side support shaft portion 40 supported on the vertical plate surface 22b so that the position thereof can be adjusted is illustrated, the structure is not limited to this structure.
For example, the reel support shaft 50 of the reel lifting lever 14 is fixed to the horizontal plate surface 22a of the right mounting bracket 22, and the lever support frame 50 on which the first shaft 61 of the two-way operation lever 13 is supported is It may have a structure that is supported on the vertical plate surface 22b so that its position can be adjusted.
Other configurations may be the same as those in the above-described embodiment.

[4 of another embodiment]
In the said embodiment, although the structure which comprised the support member with the combination of the right side mounting bracket 22 and the left side mounting bracket 23 was shown, it is not limited to this structure. For example, the right mounting bracket 22 and the left mounting bracket 23 may be configured integrally.
Other configurations may be the same as those in the above-described embodiment.

[5 of another embodiment]
In the above embodiment, the support structure of the two-way operation lever 13 is not limited to the structure using the first shaft portion 61 and the second shaft portion 62 having the axial centers y1 and x1 substantially orthogonal to each other, for example, a ball An appropriate structure such as a support structure composed of bearings can be adopted. Also, as the support structure of the reel lifting / lowering lever 14, an appropriate structure such as a support structure that is completely independent from the support structure of the two-way operation lever 13 can be adopted.
Other configurations may be the same as those in the above-described embodiment.

[6 of another embodiment]
In the above embodiment, the front mounting plate 26 and the rear mounting plate 27 are welded and fixed to the inner surface side of the front wall 20F and the inner surface side of the rear wall 20B, respectively. 27 shows a structure in which the mounting brackets 22 and 23 are fixed by welding. However, the present invention is not limited to this.
For example, although not shown, the front mounting plate 26 is connected to the inner surface side of the front wall 20F using a connection structure using a long hole or a plurality of mounting holes and bolts, and the rear mounting plate 27 is connected to the rear side. You may connect with the wall 20B using the connection structure by a long hole or several attachment holes, and a volt | bolt.
In this way, the mounting brackets 22 and 23 including the front side mounting plate 26 and the rear side mounting plate 27, the shaft support member 60 supported by the mounting brackets 22 and 23, and the reel side support shaft portion 40 are provided. It is also possible to configure so that the entire assembly including it is attached to the control tower 20 with its position adjusted.
Other configurations may be the same as those in the above-described embodiment.

  The harvesting machine in the present invention is not limited to the ordinary type combine harvester, but can be applied to a self-decomposing combine, a bean harvester such as soybean, a corn harvester, or the like.

2 Driver's seat 13 Two-way operation lever 14 One-way operation lever 20 Control tower 20F Front wall 20B Rear wall 20R Horizontal wall 22 Support member 22a Horizontal portion 22b Vertical portion 61 First swing support shaft 40 Second swing support shaft 46 Other end Support member 30 Side panel 32 Vertical wall 33, 34 Traveling shift lever 35, 36 Clutch lever B Operating part V2 Control valve V3 Control valve VB Valve unit

Claims (10)

A two-way operation lever that performs steering operation of the traveling body and lifting operation of the cutting unit by swinging operation in the front-rear direction and left-right direction on the upper part of the control tower provided in the front part of the operation unit, and swinging in the front-rear direction A one-way operation lever that performs a lifting operation of the scraping reel with respect to the reaping portion by the operation is provided in a state of being aligned in the left-right direction,
A first swing support shaft for front-rear direction swing operation in the two-way operation lever, and a second swing support shaft for front-rear direction swing operation in the one-way operation lever, respectively,
A harvesting machine in which a control valve operated by swinging back and forth of the two-way operating lever and a control valve operated by swinging back and forth of the one-way operating lever are configured as one valve unit.   A support member that supports an end portion of the first swing support shaft on the second swing support shaft side and an end portion of the second swing support shaft on the first swing support shaft side; The harvester according to claim 1, which is provided in a control tower.   A horizontal portion in which one end of the first swing support shaft and the second swing support shaft is supported by the support member, the first swing support shaft, and the second swing support shaft. The harvesting machine according to claim 2, further comprising: a vertical portion on which the other end portion is supported. The position of one of the first swing support shaft and the second swing support shaft can be changed with respect to the support member, and the first swing support shaft and the second swing support shaft. The other side of the support member is supported so that the position of the support member cannot be changed.
The harvester according to claim 2 or 3, wherein the valve unit is configured to be capable of adjusting a mounting position with respect to the control tower.   The harvesting machine according to any one of claims 2 to 4, wherein a support position of the second swing support shaft with respect to the support member is configured to be adjustable. The support member is supported by the front wall and the rear wall in a state extending between the front wall and the rear wall of the control tower,
And the other end support member which supports the edge part on the opposite side to the edge part by the side of the said 1st rocking | fluctuation spindle of said 2nd rocking | fluctuation spindle is supported by the horizontal wall of the left-right direction of the said control tower. Item 6. The harvester according to any one of Items 2 to 5. A side panel is disposed at a lateral side position in the left-right direction of the driving unit,
The side panel is disposed in a state where the front portion is adjacent to the left and right end portions of the control tower,
A driver's seat is disposed on the side of the side panel,
The side panel has a front upper surface at the same or substantially the same height as the upper part of the control tower, and a rear part is provided at a height lower than the front part along the horizontal or substantially horizontal direction, The harvesting machine according to any one of claims 1 to 6, wherein an upper surface of an intermediate portion between the front portion and the rear portion of the side panel is formed as an inclined surface that is lowered rearward.   The harvesting machine according to claim 7, wherein a traveling speed change lever is disposed at an intermediate portion of the side panel, and a clutch lever of a working portion is disposed at a rear portion of the side panel. A side panel is disposed at a lateral side position in the left-right direction of the driving unit and at a position where the front part is adjacent to the left-right direction end of the control tower,
A driver's seat is disposed on the lateral side of the side panel, and an engine is disposed below the driver's seat,
The harvester as described in any one of Claims 1-6 with which the vertical wall in alignment with an up-down direction is provided in the edge part of the side panel far from the said engine in the left-right direction.   The harvester according to claim 9, wherein a portion of the vertical wall corresponding to the same position as the engine in the front-rear direction is a porous member.

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