JPH0655059B2 - Complex operation lever structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a composite operating lever structure in which two operating devices can be operated by one operating lever.

[Conventional technology]

For example, in a combine, one operating lever is swingably supported in the front-back direction (corresponding to the first direction) and the left-right direction (corresponding to the second direction), and the cutting lever is operated by operating the operating lever in the front-back direction. There is a structure in which the side clutch brake of the traveling device can be turned on and off by operating the operation lever in the left-right direction so that the vehicle can be turned.

[Problems to be Solved by the Invention]

With the above-described structure, for example, since the operating lever can be operated leftward and rightward while operating forward, the raising and lowering operation of the mowing section and the on / off operation of the side clutch brake can be performed simultaneously with one operating lever. It is preferable that such a simultaneous operation is performed after the operator fully recognizes the work situation and the like.

However, with the above-mentioned configuration, there is a risk that the operating lever will be accidentally operated in the front-back direction while the operating lever is being operated in the left-right direction, and the cutting unit is lowered during the turning operation. It may come in contact with the ground.

It is an object of the present invention to configure a composite operation lever structure so as to prevent the erroneous operation as described above.

[Means for Solving the Problems]

A feature of the present invention is that the composite operation lever structure as described above is configured as follows.

An operation lever operable in a first direction and a second direction which are orthogonal to each other and operable in a combined direction of the first direction and the second direction, and a lever guide for guiding the operation lever in the first direction and the second direction. And a biasing mechanism for supporting the lever guide to be retractable from a predetermined position and returning the lever guide to the predetermined position. When the operating lever is operated in the first direction along the lever guide, the first device is provided. When the operation lever is operated in the second direction along the lever guide so that the
When the operation lever is operated in the combined direction of the first direction and the second direction while pushing back the lever guide with the operation lever against the biasing mechanism so that the device is switched to the forward and reverse directions, the first The operating lever and the first and second devices are linked so that the first and second devices can be operated simultaneously.

[Action]

When configured as described above, for example, as shown in FIG. 3, the operation lever (1) is moved along the lever guide (28) in the first direction (A).
And will be guided in the cross direction of the second direction (B).
As a result, normally, by operating the operation lever (1) in the first direction (A) or the second direction (B) along the lever guide (28), only one of the first device and the second device is operated. Operated.

Further, for example, even if the operator mistakenly operates the operation lever (1) in the second direction (B) while operating the operation lever (1) in the first direction (A), the operation lever (1 ) Is the lever guide (2
8) and the resistance is received from the biasing mechanism (31), the operator at this time also operates the operation lever (1) in the first direction (A) and also in the second direction (B). Recognize that you tried to operate.

When the operator grasps the work situation and is conscious of the operation of the first and second devices at the same time, as shown in FIG. 2, for example, the resistance from the biasing mechanism (31) is resisted. Lever lever (1) with the operating lever (1),
First and second directions in which the first and second devices can be operated simultaneously
Hold the operating lever (1) at a position in the combined direction of (A) and (B).

〔The invention's effect〕

As described above, in the structure in which the first and second devices can be operated with the single operation lever, it is necessary that the operation lever is operated to the position where the first and second devices are simultaneously operated by the resistance from the lever guide. Thus, the configuration in which the operator is informed that the reaper is accidentally moved down during turning of the combine to cause contact with the ground can be prevented.

Then, in a state where the operator grasps and recognizes the work situation and the like, the operator can consciously operate the operation lever to a position where the first and second devices can be simultaneously operated, so that workability and operability are improved. It is not damaged.

〔Example〕

Hereinafter, an operation lever (1) of a combine, which is one of the embodiments using the present invention, will be described with reference to the drawings.

FIG. 3 shows the lifting cylinder (9) (corresponding to the vertical lifting device) of the mowing section (8) provided at the front part of the combine and the left and right crawler type traveling devices (not shown) separately. Side clutch brake (19A), (19
The structure around the operation lever (1) that can operate B) and is shown. The support box (2) is swingably supported around the left and right axis (P ₁ ) of the control section, and the operation lever (1) is swingably supported around the front and rear axis (P ₂ ) of the support box (2). The operation lever (1) is supported so that it can be swung back and forth and left and right.

The first arm (3) extends from the support box (2) to
The first limit switch (4) is linked to the arm (3),
A spiral spring (7) is attached so as to sandwich the pin (6) extending from the fixed frame (5) and the first arm (3). With this structure, the operating lever (1) is in the front-back direction (A)
In the neutral position (corresponding to the first direction),
Limit switch (4) can be operated in 3 positions.

A lift control valve that is equipped with a lift cylinder (9) for the combine harvester (8) and supplies and discharges hydraulic oil to the lift cylinder (9).
(10) and the first limit switch (4) are linked,
By swinging the operating lever (1) in the front-back direction (A), the cutting section
(8) can be moved up and down.

As shown in FIG. 3, the first and second swinging members independent of the operating lever (1) around the front-rear axis (P ₂ ) of the support box (2).
Swing arms (11) and (12) are provided, the inner (13a) of the release wire (13) is connected to the first swing arm (11), and the outer (13b) is connected to the second swing arm ( It is linked to 12). The spring (15) has first and second springs (15) so that the fixed arm (14) extending from the lower part of the support box (2) is sandwiched by the first and second swing arms (11), (12). Swing arm (1
It is installed in 1) and (12). A pin (16) is also provided at the lower end of the operation lever (1), and the first and second swing arms (11), (12)
The support box (2) has a second limit switch (17), which is configured to be operated by an operating lever.
The second arm (18) extended from (1) is in contact.

With the above structure, the operating lever (1) moves in the left-right direction (B) (second
Direction) and the operating lever
The second limit switch (17) can be operated to the 3 position by (1), and the inner (13a) of the release wire (13) is pulled regardless of whether the operation lever (1) is operated to the left or right.

Next, the side clutch brakes (19A) and (19B) that are turned on and off by swinging the operation lever (1) in the left-right direction (B) will be described. As shown in FIG. 3, a shift member (21) is slidably fitted to the drive shafts (20) of the left and right traveling devices by a spline structure. In the state of FIG. 3, both shift members (21) are shown. Is engaged with the drive sprocket (22) and the power is transmitted to the left and right drive shafts (20).

Then, the shift member (21) is slid by the operation cylinder (23) through the swingable operation arm (24) and separated from the drive sprocket (22), so that power to one traveling device is supplied. You can decline and make a gentle turn. Further sliding operation of the shift member (21) allows multi-plate side brakes.
When (25) is pressed and operated, one traveling device is braked and a small turn can be made.

A steering control valve (26) for switching and supplying / discharging hydraulic oil to / from the left and right operation cylinders (23) and a second limit switch (17) are linked,
The release wire (13) is connected to the variable relief valve (27) for the steering cylinder (23).

With the above structure, when the operating lever (1) is swung in one of the left and right directions (B) by the set angle, the second limit switch
The steering control valve (26) is operated by a signal from (17), and hydraulic oil is supplied to one operation schilling (23). in this case,
The variable relief valve (27) acts in the neutral position before the shift member (21) is separated from the drive sprocket (22) and the side brake (25) is pressed, and the operating cylinder (23) and the shift member ( 21) is retained. When the operating lever (1) is further swung, the release wire (13) is pulled to increase the opening pressure of the variable relief valve (27),
(23) extends from the neutral position, and the shift member (21) presses and operates the side brake (25).

Next, a structure for guiding the operation lever (1) in the front-rear direction (A), the left-right direction (B), and their combined direction will be described.
Four sets of lever guides (28) as shown in Figs.
Is sandwiched between two sets of frames (29) and (30) and held, and each lever guide (2
8) allows independent slide back. On the underside of each lever guide (28), a stopper member (28
a) is provided, and a spring (31) (corresponding to a biasing mechanism) is provided over each stopper member (28a).
The (29), (30) and the lever guide (28) are configured as one unit. A bracket (32) is extended from the frame (29), and this unit is passed from the tip side of the operating lever (1) to fix the bracket (32) to the mounting seat (33) on the control section side.

This allows the lever guide (28) to move the operating lever (1).
Is guided in the front-back direction (A) and the left-right direction (B). And
Lever guide by the operation lever (1) as shown in Fig. 2.
Push (28) back and forth to move it forward and backward (A) and left and right
By moving in the direction combined with (B), the operation lever
Move (1) up and down the mowing part (8) and side clutch brake.
It can also be operated at a position where (19A) and (19B) can be operated simultaneously.

[Another embodiment]

Although the lever guide (28) is slid in the above-described embodiment, as shown in FIG. 4, eight sets of the lever guides (28) swinging around the respective longitudinal axes are provided, and the spiral spring (34 )
It is also possible to adopt a structure that urges to the return side (corresponding to a biasing mechanism).

In the above embodiments, the lever guide (28) and the spring (31)
Although it is configured separately from the (spring coil (34)), as shown in FIG. 5, the lever guide (28) is configured by a leaf spring having elasticity to urge the lever guide (28) itself. It is also possible to adopt a structure that has.

Further, the above-described lever guide structure may be applied to an operation lever that vertically and horizontally operates a grain discharge cylinder that discharges grains in the grain tank in the combine harvester.

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

[Brief description of drawings]

The drawings show an embodiment of a composite operating lever structure according to the present invention. Fig. 1 is an exploded perspective view of a lever guide and its supporting structure, Fig. 2 is a plan view of the vicinity of the lever guide, and Fig. 3 is an operating lever. FIG. 4 is a diagram showing a structure for linking an elevating cylinder and a side clutch brake, FIG. 4 is a plan view near a lever guide in the first alternative embodiment, and FIG. 5 is a plan view near a lever guide in the second alternative embodiment. (1) …… Operating lever, (8) …… Mowing part, (9) …… Up / down lifting device, (19A), (19B) …… Side clutch brake, (28)
...... Lever guide, (31), (34) ...... Biasing mechanism, (A) ...... First direction, (B) ...... Second direction.

Claims (3)

[Claims] 1. A first direction (A) and a second direction orthogonal to each other
Operable in (B), and the first direction (A) and the second direction (B)
An operating lever (1) operable in a combined direction with the operating lever (1), the operating lever (1), the first direction (A) and the second direction
(B) a lever guide (28) for guiding the lever guide (28) from a predetermined position to be retractable, and the lever guide (28) is returned to the predetermined position biasing mechanism (31 ), (34), and when the operation lever (1) is operated in the first direction (A) along the lever guide (28), the first device is switched so as to operate in the forward and reverse directions. Place the operating lever (1) on the lever guide (2
When operated in the second direction (B) along 8), the second device is switched between forward and reverse, and the operation lever is operated against the biasing mechanisms (31) and (34).
When the operation lever (1) is operated in the combined direction of the first direction (A) and the second direction (B) while pushing the lever guide (28) away from (1), the first and second devices are moved. A composite operating lever structure in which the operating lever (1) and the first and second devices are linked so that they can be operated simultaneously. 2. The first device is a vertical lifting device (9) for a harvesting section (8) of a combine, and the second device is a side clutch brake (19A) provided on each of left and right traveling devices of the combine, (19B) The composite operation lever structure according to claim 1. 3. The composite according to claim 1, wherein the first device is a vertically elevating device for a grain carrying-out barrel of a combine, and the second device is a horizontal turning device for the grain carrying-out barrel. Operation lever structure.