JPH0737Y2 - Combine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a combine capable of raising and lowering a reaper and steering by turning on and off a left and right side clutch with a single operating lever.

[Conventional technology]

In the combine as described above, the cutting unit is configured to be moved up and down by a single-acting hydraulic cylinder, and a hydraulic cylinder is provided as a hydraulic actuator for opening and closing the right and left side clutches for steering in the crawler traveling device. And a first control valve for the hydraulic cylinder for raising and lowering the mowing section, and a second control valve for the hydraulic cylinder (8) for operating the left and right side clutch on / off operations are connected in series to allow operation lever guides forward, backward, left and right. (1) by the operation before and after (2)
There is a model in which the second control valve is configured to be operated by operating the control lever left and right so that the control valve is operated.

[Problems to be solved by the device]

As described above, when the first control valve and the second control valve are connected in series, only one control valve can be operated and it is impossible to turn the mowing section while moving up and down. This is because there is a limit to the capacity of the pump for the hydraulic cylinders for raising and lowering the parts and the hydraulic cylinders for operating the left and right side clutches. Further, the lever guide (2) of the operation lever (1) having such a structure is provided with a cross-shaped opening (2c) as shown in FIG. 4, but also the simultaneous operation of both control valves. There is a slight difficulty in terms of operability when it is impossible to do so.

Here, the present invention has been made by paying attention to the above-mentioned situation, and is configured such that both control valves can be simultaneously operated to some extent while leaving the state in which the first and second control valves are connected in series. Is intended.

[Means for Solving the Problems]

A feature of the present invention is that, in the combine as described above, the rectangular first opening having the horizontal operating range of the operating lever as the horizontal side and the vertical operating range from the neutral position to the first control valve drainage position as the vertical side is provided. This is because the lever guide is provided with a second opening for guiding the operation lever from the neutral position to the reaping section rising position, in addition to being provided in the lever guide of the operation lever. The action and effect are as follows.

[Action]

In the raising / lowering operation of the mowing unit, the raising operation is performed by supplying hydraulic oil to the hydraulic cylinder and extending the hydraulic cylinder. On the other hand, when the hydraulic cylinder is drained, the mowing section descends due to the weight of the mowing section, so that the hydraulic oil from the pump is unnecessary when the mowing section is lowered.

Therefore, when the lever guide (2) is provided with the first opening (2a) and the second opening (2b) as configured above, the operation lever (1) is moved forward and backward ((A By operating in the range between ( _U ) and (A _D ), the mowing section is moved up and down ((A _U position is the first control valve operating oil supply operation to raise the mowing section, and the (A _D ) position is the first position). It is possible to lower the mowing section by draining the control valve). By operating the operating lever (1) in the left-right direction (the range between ( _BR ) and ( _BL )), the left and right side clutch can be turned on and off. You can do it.
Then, move the operating lever (1) in the diagonal direction (A _D B _R ),
It becomes possible to operate to the (A _D B _L ) position, and the steering operation can be performed by turning the left and right side clutches on and off while lowering the mowing unit with the hydraulic cylinder of the mowing unit draining oil at this position.

Also, between the (A _D B _R ) position and the (B _R ), (A _D ) positions, (A _D
The operation lever (1) can be easily operated even between the B _L ) position and the (B _L ) and (A _D ) positions.

[Advantage of the Invention] As described above, by effectively utilizing the structure in which the mowing part descends by the weight of the mowing part without using hydraulic oil from the pump, the first control valve for raising and lowering the mowing part and the left and right Even when the second control valve for side clutch on / off operation is connected in series, the lowering operation of the mowing section and the steering operation by turning on / off the left and right side clutches can be performed at the same time, thereby improving maneuverability. I was able to.

In the combine harvester, when one mowing process along the planted culm is completed, the mowing unit is lifted at the edge of the ridge and then swirled to enter the next mowing process. In this case, since the operation of manipulating the machine body while lowering the mowing unit is performed to align the mowing unit with the row of planted hulls, the present invention is particularly useful for such an operation. .

〔Example〕

Hereinafter, a combine, which is an embodiment of the present invention, will be described with reference to the drawings.

FIG. 2 shows the support structure of the operation lever (1), which is a U-shaped bracket on a support shaft (3) which is rotatably supported around the left and right axis (P ₁ ) of the lever guide (2). (4) is fixed, and the front and rear axis (P ₂ ) of this bracket (4)
The operation lever (1) is attached around it so that it can swing.
The operating lever (1) is configured to be swingable back and forth and left and right.

Explaining the lifting operation system of the mowing section (5) in the combine in detail, as shown in FIG. 2, the hydraulic oil from the pump (6) is first supplied to the first control valve (7). This first control valve (7) supplies and discharges hydraulic oil to and from a single-acting hydraulic cylinder (8) that moves the cutting unit (5) up and down (the hydraulic cylinder (8) extends when the hydraulic oil is supplied and the cutting operation is performed). Part (5) rises, hydraulic cylinder (8) contracts due to hydraulic oil discharge, and mowing part (5) descends)
The first control valve (7) is interlocked with the support shaft (3) of the operation lever (1) and the linkage mechanism (9). With the above structure, when the operation lever (1) is operated from the neutral position (N) to the (A _U ) position along the front-rear direction as shown in FIGS. 1 and 2, the first control valve (7) operates the hydraulic oil. The mowing section (5) is operated to be raised by operating the supply side, and when the operation lever (1) is operated to the ( _AD ) position, the first control valve (7) is operated to the oil drain side and the mowing section (5) is operated. 5) descends under its own weight.

Next, the left and right side clutches (17R) and (17L), which are the steering operation system of the combine, and the arm (19) fixed to the operation lever (1) and the push-ful wire (20) are connected to the operation system. They are linked together. With the above structure, when the operation lever (1) is oscillated in one of the left and right directions (B) by the set angle, the second control valve (16) is operated to supply the hydraulic oil to one hydraulic cylinder (13). By the action of the variable relief valve (18), the shift member (11) is separated from the drive sprocket (12) and is held in the neutral position before the side brake (15) is pressed. When the operating lever (1) is further swung to bring it to the ( _BR ) or ( _BL ) position shown in Fig. 1, the relief pressure of the variable relief valve (18) is increased and the hydraulic cylinder. (1
3) extends further than the neutral position, and the shift member (1
1) pushes in and operates the side brake (15).

Next, the lever guide (2) for the operation lever (1) will be described in detail. As shown in FIGS. 1 and 2, the left and right operation range ((B _L ) position and (B _R ) of the operation lever (1) are shown. (The range extending from the position) to the horizontal side, and the neutral position (N) and the first
Excluding the control valve (7) in detail, as shown in FIG. 2, the shift member (11) slides into a spline structure with respect to the left and right drive shafts (10) of the left and right crawler traveling devices (not shown). The state of FIG. 2 is a state where both shift members (11) are engaged with the drive sprockets (12) and power is transmitted to the left and right drive shafts (10). Then, the shift member (11) is connected to the hydraulic actuator (13).
Oscillating operation arm with hydraulic cylinder (14)
Sliding through the drive sprocket (12) separates it from the drive sprocket (12) to cut off the power to one of the crawler traveling devices to allow a gentle turn, and when sliding the shift member (11), a multi-plate side brake (15 ) Is pressed and operated, one crawler traveling device is braked, and a small turn can be performed.

The second control valve (16) for switching the operation to the left and right hydraulic cylinders (13) is connected in series with the first control valve (7). 16) and the variable relief valve (18) have a rectangular first opening (2) having a vertical side (height) in the range extending from the oil position (( _AD ) position).
a) is provided on the lever guide (2), and the second opening (2b) extending from the neutral position (N) of the operation lever (1) to the raised position ((A _U ) position) of the mowing part (5) is provided on the lever. It is provided in the guide (2).

With the above structure, move the operating lever (1) forward and backward (A).
Alternatively, by operating in the left-right direction (B), the raising and lowering operation and the steering operation of the reaping section (5) can be performed separately. Then, the operating lever (1) is operated to the (A _D B _R ) position or the (A _D B _L ) position to lower the mowing unit (5), and the steering operation can be performed while the flow is (A _D B _R ) Position and ( _BR ), (A _D ) position, and between (A _{D BL} ) position and (B _L ), (A _D ) position, the operation lever (1) can be easily moved. You can operate it. Further, at the (A _U ) position where the cutting unit (5) is operated to be raised, the operation lever (1) cannot be operated left and right due to the guiding action of the second opening (2b). That is, the steering operation cannot be performed while raising the reaper (5).

Next, a description will be given of a structure in which the brake pedal (21), a brake (22) for traveling braking other than the side brake (15), and a belt tension type main clutch (not shown) are linked with each other, and FIG. As described above, the brake pedal (21) is fixed to one end of the support shaft (23) which is rotatable around the horizontal axis (P ₃ ), and the L-shaped arm (24) is fixed to the other end.
A rod (27) is erected between the tension arm (26) for the main clutch and the arm (24) that is swingable around the horizontal axis (P ₄ ) and is urged toward the main clutch by the spring (25). Has been done. And the operation arm (22a) of the brake (22)
A bracket (29) attached to the arm (24) is inserted into a rod (28) extending from the rod (28), and the bracket (29) is sandwiched by a pair of springs (30a) and (30b) (spring). The spring constant of the spring (30a) is set larger than that of (30b)).

With the above structure, when the brake pedal (21) is depressed, the main clutch is disengaged and the brake pedal (22)
Is in a braking state, and when the foot is released from the brake pedal (21), the braking force is applied by the spring (25) to the brake (22).
Is returned and the main clutch is engaged.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of the combine according to the present invention. FIG. 1 is a plan view of a lever guide, FIG. 2 is a view showing a connecting structure of an operating lever and first and second control valves, and FIG. 3 is a brake. FIG. 4 is a perspective view showing a linkage structure of a pedal, a tension arm for a main clutch, and a brake for traveling braking, and FIG. 4 is a plan view of a lever guide in a conventional structure. (1) …… Operating lever, (2) …… Lever guide, (2
a) ...... Lever guide first opening, (2b) ...... Lever guide second opening, (5) ...... Mowing section, (7) ...... First control valve, (8) ...... Hydraulic cylinder, ( 13) …… hydraulic actuator, (16) …… second control valve, (17R), (17L)…
... left and right side clutch, (N) ... neutral position.

Claims (1)

[Scope of utility model registration request] 1. A first control valve (7) for a hydraulic cylinder (8) for raising a reaper (5) and a hydraulic actuator for turning on / off the left and right side clutches (17R), (17L) in a crawler traveling device. A second control valve (16) for (13) and (13) is connected in series, and the first control valve (7) is operated by operating the operating lever (1) back and forth.
Is operated and the second control valve (16) is operated by operating the operation lever (1) left and right, and the operation lever (1) and the first and second control valves (7), (16 ) Is connected to the left and right operation range of the operation lever (1) on the horizontal side, and the front and rear operation range from the neutral position (N) to the oil discharge position of the first control valve (7) on the vertical side. A rectangular first opening (2a) is provided in the lever guide (2) of the operating lever (1), and the operating lever (1) is guided from the neutral position (N) to the raised position of the reaper (5). Combine with two openings (2b) in the lever guide (2).