JP2002272249A - Lifting operation part of pretreatment part in combined harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting operation part of a pretreatment part without enlarging the lifting operation space more than being required in a combined harvester. SOLUTION: The operation part 7 for operating the machine is installed at the side of the pretreatment part 3 in front of the machine 2 supported by the right and left running gears 1. A steering handle 9 for operating a steering direction by rotating around the axial center is installed as a steering direction operation part of the machine 2. The steering handle 9 is connected with the lifting mechanism side of the pretreatment part 3 so that lifting and lowering of the pretreatment 3 is operated by vertical lifting and lowering of the steering handle 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting operation part of a pre-processing part in a combine.

[0002]

2. Description of the Related Art Conventionally, a pre-processing unit is provided in front of a fuselage supported by left and right traveling devices, and a threshing unit is provided behind the pre-processing unit. A combine provided with a section is known. The operation unit is provided with a steering operation unit for steering the fuselage. As the steering operation unit, a steering handle for operating the steering of the fuselage by rotating around an axis, and a left-right swing. And a multi-operation lever for operating the steering of the aircraft.

[0003]

The steering handle and the multi-operation lever also function as an elevating operation part for operating the elevation of the pre-processing unit, and by swinging the steering handle and the multi-operation lever back and forth. , The pre-processing unit is moved up and down. However, in this case, there are disadvantages such as an increase in the vertical operation space for operating the vertical movement of the pre-processing unit in the front-rear direction, and a problem such as a change in the vertical state due to vibration from the field or the like.

[0004]

In order to solve the above-mentioned problems, a vertical operation unit of a pre-processing unit in a combine according to the present invention has a body 2 supported by right and left traveling devices 1 and a body 2
And a threshing unit 4 behind the pre-processing unit 3.
In a combine in which an operating unit 7 for maneuvering the aircraft is provided on the side of the preprocessing unit 3, a steering operation unit for steering the aircraft 2 is provided on the operating unit 7, and the steering operating unit is provided with: The steering handle 9 is configured to be rotatable about an axis by operating the steering. The steering handle 9 is supported so as to be able to move up and down. The first feature is that the up-and-down movement of the handle 9 is linked with the up-and-down movement of the pre-processing unit 3.

[0005] Second, the vertical movement mechanism of the steering handle 9 is characterized in that the operation load at the time of raising the steering handle 9 is smaller than the operation load at the time of the lowering operation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are a side view and a front view, respectively, of a combine of the present invention.
A body 2 is provided on the upper side, and a pre-processing unit 3 for cutting the culm of the field and transporting it to the rear is provided in front of the body 2 so as to be movable up and down. A threshing unit 4 is provided for threshing the grain stems conveyed from the processing unit 3 side.

On the other hand, a driver's seat 6 is provided beside the pre-processing unit 3 and the threshing unit 4 for seating and maneuvering the airframe 2, and the driver's seat 6 is disposed beside the pre-processing unit 3. A front operation unit 7, a seat 8 behind the front operation unit 7 and beside the threshing unit 4 are provided.

At this time, the front operating section 7 can be depressed stepwise into a substantially donut-shaped steering handle 9 having a circular outer periphery in a plan view, and protrudingly provided from the floor 11 of the driver's seat 6 in front of the seat 8. Parking brake pedal 1
2. The operation switch 13 and the accelerator lever 14
It is provided as an operation device constituting the front operation unit 7.

The front operation unit 7 controls the left and right steering of the body 2 by rotating the steering handle 9, raises and lowers the preprocessing unit 3 by up and down operation, and stops the body 2 by depressing the parking brake pedal 12. The structure is such that each operation can be performed while the operator is seated on the engine speed by swinging the accelerator lever 14. That is, the steering handle 9 is a steering operation section that steers the body 2.

At this time, a steering shaft 16 is attached concentrically to a shaft center (center) of the steering handle 9, and the steering shaft 16 is supported by a steering case 18 so as to be rotatable about the shaft center. As a result, the steering handle 9 can be rotated around the axis, and the body 2 is steered by the rotation of the steering handle 9 around the axis as described later.

An operating portion bracket 15 protruding rearward is attached to both left and right edges of the steering case 18 in a front view.
Is on the upper side of the operation unit bracket 15,
4 is attached to the side surface of the operation unit bracket 15. Thus, the front operation unit 7 is configured not to unnecessarily expand in the left-right direction. That is, the switch 1 which is a part of the operation device constituting the front operation unit 7
3 and an accelerator lever 14 are provided attached to the operation unit bracket 15 side.

On the other hand, the driving device 1 is driven by inputting a driving force from an engine (not shown) via a transmission as is conventionally known, and is driven inside the transmission. A side clutch (not shown) is provided, and when the side clutch (left side clutch) for the left traveling device 1L is engaged, the left traveling device 1L is driven and the right traveling device 1R is used. Side clutch (right side clutch)
, The right traveling device 1R is driven.

In this embodiment, as shown in FIGS. 3 to 5, the base end of the steering handle 9 is
An operation box 21 for operating a side clutch via a wire 19 is fixedly provided on the body frame 2a side, and the steering handle 9 operates the side clutch via the operation box 21 to steer the body 2. It is configured as follows.

Next, the structure of the operation box 21 will be described. The operation box 21 is provided with an operation arm 22 which is curved in a substantially V-shape and is pivotally supported at the center (bending) portion. A wire 19 for operating each side clutch is connected to both ends of the operation arm 22 so as to be connected to the side clutch.

At this time, a boss 23 is provided at the center of the operation arm 22 so as to protrude upward and downward.
The lower end side of the steering shaft 16 protruding from the upper surface side of the operation box 21 in the inside 3 is axially supported via an up-down spline 24. In this embodiment, the steering shaft 16 is inserted into the boss 23 via the spline 24. However, if the boss 23 and the steering shaft 16 are integrated with each other in the rotation direction and can be slid in the axial center direction, An insertion structure may be used.

That is, the steering shaft 1 has the above structure.
6 and the boss 23 (operation arm 22) are integral with each other in the rotation direction, and the steering shaft 16 is vertically slidable (slidable) vertically with respect to the boss 23 (operation arm 22) via a spline 24. It has become.

On the other hand, the steering shaft 16 has an upper small diameter portion 16U to which the steering handle 9 at the upper end is attached, a lower small diameter portion 16D at a lower end portion, and a large diameter portion 16M between the upper small diameter portion 16U and the lower small diameter portion 16D. It is a stepped shaft, and the large diameter portion 16M of the steering shaft 16
Is supported at the upper end side of a cylindrical steering case 18 projecting upward from the upper surface of the operation box 21 via a bearing 26 such as a bush or a bearing so as to be rotatable and vertically slidable (slidable).

The above-mentioned boss 23 is rotatably supported by a bearing 27 provided on the upper surface side of the operation box 21. As described above, the steering shaft 16 is provided inside the steering case 18 with the shaft center as the center. It is rotatably supported. At this time, the steering shaft 16 is slidable up and down with respect to the steering case 18 because the steering shaft 16 is slidable up and down with respect to the boss 23.

By rotating the steering handle 9 right and left, the steering handle 9 and the steering shaft 18 are integrated, so that the operation arm 2
2 is swung right and left integrally with the steering shaft 18, and when the steering handle 9 is moved up and down, the steering shaft 18 maintains the swinging state (swing angle) of the operation arm 22 (the steering arm 22). Slide up and down with respect to case 18).

That is, by turning the steering handle 9 in the left-right direction, the wire 19 is operated via the operation arm 22, and the side clutch is operated by this wire operation, so that the body 2 is steered. Since the operation of the side clutch by the wire 19 is known, the detailed structure is omitted.

Since both ends of the operation arm 22 are urged by the spring 20, when the rotation operation of the steering handle 9 is released, the operation arm 22 is returned to the neutral position by the urging force of the spring 20, and the body 2 is moved straight.

On the other hand, at the lower end of the steering shaft 16 (the lower end of the lower small diameter portion 16D) in the operation box 21, a pin 28 in the left-right direction protrudes below the operation arm 22. A link arm 31, which is substantially L-shaped when viewed from the side, is pivotally supported on the support shaft 29 protruding inward from the inner surface of the operation box 21 so that the bent portion is vertically swingable. Is provided.

A wire 32 is interposed between one end of the link arm 31 (the end of the arm 31a in the vertical direction) and the hydraulic valve for operating the elevation of the pre-processing unit 3. The hydraulic valve is operated via the wire 32 by the rocking of the pre-processing unit 3 so that the elevation of the pre-processing unit 3 can be controlled.

The other one of the link arms 31 (front-back direction)
The arm 31b is provided with a long hole 33, into which the pin 28 is inserted. By moving the steering handle 9 up and down as described above, the steering shaft 16 slides up and down, and the pin 28
The link arm 31 is swung through the
The pre-processing unit 3 is moved up and down via 2.

As described above, the steering handle 9
When the steering shaft 16 is rotated by rotating the steering wheel 16, the pin 28 also rotates integrally with the steering shaft 16. For this reason, the pin 28 has a sufficient length that the pin 28 does not come out of the link arm 31 due to the rotation of the steering shaft 16. It is configured to be regulated.

On the other hand, a compression spring 36 is provided between the stepped portion of the lower small diameter portion 16D and the large diameter portion 16M and the upper surface of the bearing 27, and the lower surface of the boss 23 and the upper surface (upper edge) of the pin 28. A compression spring 37 is provided between the side and the lower side so as to be fitted to the lower small diameter portion 16D. That is, the upper compression spring 36 biases the steering shaft 16 upward, and the lower spring 37 biases the steering shaft 16 downward.

The compression spring 36 receives a load on the steering shaft 16 side or a downward load force on the steering shaft 16 side such as the load 16 and the urging force of the compression spring 37 on the lower side. The shaft 16 (steering handle 9) is held at a predetermined position (neutral position) where the urging force of the compression spring 36 and the downward load force on the steering shaft 16 side are balanced.

In the present embodiment, the urging force of the compression spring 37 on the lower side is substantially zero at the neutral position in the vertical direction of the steering shaft 16 or smaller than the urging force of the compression spring 36. Is set. The lower compression spring 37 has a smaller elastic force than the upper compression spring 36.

With the mechanism for vertically moving the steering handle 9 having the above structure, the operator can raise and lower the steering handle 9 as described above. Since the lifting operation needs to be performed against the urging force of 37, the lifting operation can be performed with a smaller operation force than the lowering operation, and the lifting operation force on the steering handle 9 is released (release the hand from the steering handle 9). ) And the steering handle 9 automatically returns to the neutral position.

In this embodiment, the pre-processing unit 3 is set to be lowered by lowering the steering handle 9, and the pre-processing unit 3 is set to be raised by raising the steering handle 9. That is, when the steering handle 9 is lowered from the neutral position, the link arm 31 operates the hydraulic valve for elevating the pre-processing unit via the wire 32 so as to discharge the pressure oil from the hydraulic cylinder for elevating the pre-processing unit.

As a result, the pre-processing unit 3 starts descending, and the steering handle 9 is moved at a predetermined height of the pre-processing unit 3.
When the hand is released, the steering handle 9 returns to the neutral position in the vertical direction, whereby the link arm 31 returns the hydraulic valve to the neutral position via the wire 32, and the preprocessing unit 3
Height is fixed.

When the steering handle 9 is raised from the neutral position, the link arm 31 operates the hydraulic valve for raising and lowering the pre-processing unit via the wire 32 so as to send pressure oil to the hydraulic cylinder for raising and lowering the pre-processing unit. As a result, the pre-processing unit 3 starts ascending, and when the hand is released from the steering handle 9 at a predetermined height of the pre-processing unit 3, the steering handle 9 returns to the neutral position in the vertical direction. The hydraulic valve is returned to the neutral position via the wire 32, and the height of the pre-processing unit 3 is fixed.

With the above structure, the pre-processing unit 3 is raised and lowered by raising and lowering the steering handle 9, so that the steering wheel, the multi-operation lever and the like are swung back and forth to raise and lower the pre-processing unit as in the prior art. In comparison, the elevating operation space for operating the elevating and lowering of the pre-processing unit 3 does not become unnecessarily large in the front-rear direction, that is, the elevating mechanism of the pre-processing unit 3 can be formed compact, It is possible to prevent troubles such as a change in the ascending and descending state due to vibration or the like, and to stably perform the ascending and descending operation.

In the case where the combine is to be driven in the field, the steering handle 9 is pushed downward to lower the pre-processing unit 3, so that the operation can be performed stably. Further, the raising of the pre-processing unit 3 can be easily performed by raising and raising the steering handle 9 with a relatively small (light) operation force. There is no necessity, and it is possible to prevent a fall or the like.

The operation box 21 provided with an operation mechanism including a lifting mechanism for the steering handle 9 is compact and simple.

On the other hand, an engine room 41 for accommodating the above-mentioned engine (not shown) is formed below the seat 8, and behind the engine room 41 (driver's seat 6), the grain after threshing is paddy. A paddy receiving section 42 for filling the bag is provided. In the paddy receiving portion 42, hanger 43 before and after supporting the paddy bag are provided so as to protrude in the left-right direction. Is protruding.

Thus, in the paddy receiving section 42, the paddy bag is hooked on the hanger 43 to be supported, and the tip of the fryer cylinder 44 is inserted in the vicinity of or into the feed port of the paddy bag, The grains are easily moved (discharged) from the threshing unit 4 to the paddy bags and packed in bags.

Further, a bracket 46 is attached between the threshing unit 4 and the paddy receiving unit 42 and is fixed to the fluffing cylinder 44 side, and the bracket 46 is located behind the paddy receiving unit 42. As described above, the rear operation unit 48 including the operation lever 47 for operating the steering and braking of the aircraft is provided.

That is, the operator stands up behind the fuselage 2 and operates the left and right side clutch levers constituting the operation lever 47 to control the steering of the fuselage 2. By operating the parking brake lever, the stopping of the aircraft 2 can be operated. This allows the operator to operate the fuselage 2 in an upright posture by the rear operation unit 48, and to use a riding-type combine which controls the airframe 2 while sitting on the seat 8 by the front operation unit 7 as a walking type. Can be.

Thus, the combine is used as a walking type (steered by the rear operation unit 48 in the standing posture).
This makes it easy to move on a relatively narrow steep agricultural road in a mountainous area, or to perform work traveling in a relatively narrow field. As described above, the frame body to which at least a part of the front operation unit 7 is attached is attached. (Steering case 18 and operation unit bracket 15) do not become unnecessarily large in the left-right direction.

Therefore, when the rear operation unit 48 operates in the upright posture, the visibility in the forward direction is improved, so that the rear operation unit 48 can easily operate the body 2. In addition, since the rear operation unit 48 is disposed behind the seat 8 (behind the paddy receiving unit 42), that is, on the rearmost side of the machine body 2, and the combine is configured to be relatively compact, it is easier to move the farm road and the like. It can be carried out.

At this time, since the steering of the body 2 by the front operation unit 7 is performed by the steering handle 9, the operability is relatively high, and the steering of the body 2 can be easily performed. On the other hand, the steering of the body 2 by the rear operation unit 48 is performed by the operator having the operation lever 47 that can be swung back and forth and swinging one or both of the left and right side clutch levers back and forth. The body 2 can be stably supported, and the steering operation (the swinging operation of the left and right side clutch levers) can be performed while the stable support state of the body 2 is maintained.
Can be operated stably.

As described above, the combine is configured to be more compact, and has a total width of about 1.2 m, a total length of about 2.3 m, and a total height of about 1.3 m. As a result, the combine can be more easily handled (used) on a relatively narrow farm road or a field such as a mountainous area as described above.

[0044]

According to the structure of the present invention constructed as described above, the pre-processing unit is raised and lowered by raising and lowering the steering handle, so that the steering handle and the multi-operation lever are swung back and forth as in the prior art. Compared to the structure that moves the pre-processing unit up and down, the elevating operation space for operating the pre-processing unit is not excessively large in the front-rear direction, and the pre-processing unit lifting mechanism is compact. In addition to this, it is possible to prevent troubles such as a change in the ascending and descending state due to vibrations from the field and the like, and it is possible to stably perform the ascending and descending operation.

Further, by configuring the operating load at the time of raising operation of the steering handle to be smaller than the operating load at the time of lowering operation, the lowering operation of the steering handle applies a load to the steering handle from above. Therefore, the steering operation can be easily and stably performed, and the operation of raising the steering handle can be easily performed with a relatively small (light) operation force, and an unnecessary load is applied to the rear of the aircraft in a field or the like. No need,
There is an advantage that a fall or the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a front view of the combine.

FIG. 3 is a front sectional view of a steering mechanism portion.

FIG. 4 is a plan view of an operation arm portion.

FIG. 5 is a side sectional view of an operation box portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling device 2 Airframe 3 Pre-processing part 4 Threshing part 7 Forward operation part (operation part) 9 Steering handle

Claims (2)

[Claims] An airframe (2) is supported by left and right traveling devices (1), a preprocessing unit (3) is provided in front of the airframe (2), and a threshing unit (4) is installed behind the preprocessing unit (3). ) Are provided, and in the combine in which the operating unit (7) for operating the aircraft is provided beside the preprocessing unit (3), the operating unit (7) is provided with a steering operating unit for steering the aircraft (2). And a steering handle (9) for operating the steering by rotating the steering operation unit about the axis. The steering handle (9) is supported so as to be able to move up and down, and the steering handle (9) is provided. ) Side and the lifting mechanism side of the pre-processing unit (3),
An elevation operation unit of the preprocessing unit in the combine which is linked so that the elevation of the preprocessing unit (3) is operated by the vertical movement of the steering handle (9). 2. An up-and-down moving mechanism for a steering handle (9), wherein an operating load at the time of raising operation of the steering handle (9) is smaller than an operating load at the time of lowering operation. Elevating operation part of pre-processing part in combine.