JP2585946Y2 - Inclination control mechanism of offset type working machine - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a tilt control for a tractor equipped with an offset type working machine which is extended on one side for work in a ridge or in a house, or is provided so as to be movable and projectable to the side. Related to the structure of the mechanism.

[0002]

2. Description of the Related Art Conventionally, a three-point or two-point work equipment mounting device is interposed in order to mount a work machine such as a rotary machine at the rear of a tractor. Either of them is provided with a tilt control actuator consisting of a hydraulic cylinder or the like, and the actuator lifts or contracts the one lift link to swing the work machine, and corrects the left-right tilt or maintains the tilt at a predetermined angle. Tractors with a control mechanism are known.

[0003]

The conventional tilt control actuator is not limited to which one of the left and right lift links is attached. However, if the work implement is mounted on one side, and if the tilt control actuator is attached to the link closer to the protruding side, the rotation of the rotary will occur on the opposite protruding side where the actuator is not provided. Since the swinging is performed with the attachment point to the link as a fulcrum, the distance between the fulcrum and the extended side end of the rotary is long, and therefore, the vertical swing width of the extended side end is very large. This causes a reduction in the operating speed, and a problem such as an increase in the deviation of the vertical position from the set rotary height.

[0004]

Means for Solving the Problems The present invention uses the following means to solve the above problems. In the case of an offset type work machine, a tilt control actuator is attached to either the left or right of the lift link of the tractor work machine mounting device, and one of the right and left work machines is protruded to the side.
The tilt control actuator is attached to the lift link on the opposite side to the protruding side of the left and right lift links.

[0005]

Since the tilt control actuator is attached to the lift link on the side opposite to the projecting side, the working machine swings around the mounting point of the lift link closer to the side where the actuator is not attached, The vertical swing width of the extension side end of the work machine and the end on the opposite side is small.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; Fig. 1 is a plan view of a tractor equipped with an offset type rotary, Fig. 2 is a schematic rear view of the case where an offset type rotary is mounted on a tractor and an actuator for tilt control is attached to a lift link on a side opposite to the protruding side, and Fig. It is a rear elevation schematic diagram in the case of attaching the actuator for inclination control to the lift link on the side.

Referring to FIG. 1, a description will be given of a configuration for mounting an offset rotary as a working machine on a tractor. Behind the tractor T, a three-point link type work equipment mounting device is protrudingly provided. The top link 1 protrudes from the apex position, and the lower ends protrude the lower links 2L and 2R. Hitch (auto hitch) 6
At the rear end of the hitch 6, an offset type rotary R
Is provided with a claw member for easily attaching and detaching the mounting portion. However, the offset type rotary R can be configured to be moved and slid left and right by a hydraulic cylinder so that one of the rotary R is projected. Each of the lower links 2L and 2R has its horizontal swing regulated by the anti-rolling link 5.5. In the vertical swing, the middle of the lower link 2L is used for tilt control. In the cylinder 3, an intermediate portion of the lower link 2R is connected by a lift link 4, and the upper ends of the tilt control cylinder 3 and the lift link 4 are connected to a lift arm, so that the offset rotary can be moved up and down.

A tractor T having such a mounting device
, An offset type rotary R is mounted. In the present embodiment, an example in which the right side protrudes is shown. That is,
In the offset type rotary R, a mounting portion for the tractor is provided on the left side. The mounting part is provided with a triangular mast 7 and the apex thereof is connected to the top link 1.
The left and right lower link 2L are attached to the claw member at the rear end.
-Each of the 2Rs is attached to the claw member at the rear end portion while being locked.

The tractor T has, as described above,
The lower link 2L is supported by the tilt control cylinder 3. The tilt control cylinder 3, which is an actuator for tilt control, is driven by hydraulic pressure based on detection of the right and left tilt angles of the rotary by an angle sensor, and raises and lowers the lower link 2L by expansion and contraction, so that the left and right tilts of the mounted rotary can be adjusted. Is maintained at the set inclination angle.
Here, if one of the lower links can be moved up and down by the tilt control cylinder 3, the rotary can be swung right and left with the mounting point of the other lower link as a fulcrum. No. 3 may be attached to either the left or right lower link in the conventional tractor.

However, in this embodiment, the offset type rotary R protruding from the right side is mounted. In this case, the tilt control cylinder 3 is attached to the left side (lower phosphorus 2L side) as shown in FIG. A comparison between the case and the case where the lower link is attached to the right side (lower link 2R side) as shown in FIG. 3 (the lower link opposite to the lower link supported by the tilt control cylinder 3 is connected to the lift link 4). 2), the rotary R swings around the right lower link 2R as a fulcrum in FIG. 2 and the left rotary in FIG. It swings with the lower link 2L as a fulcrum. Since the lower link 2R position is closer to the right end (projecting side end) of the rotary R than the lower link 2L position, the right end swing width L1 in FIG. 2 is the right end swing width in FIG. It becomes smaller than L2. That is, the lower link 2L ・ 2
As long as the distance from the fulcrum of the lower link 2R to the right end is longer than the distance between R, the right end swing width becomes shorter when the lower link 2R is swung about the fulcrum. (L1 <
L2)

If the right end swing width L2 is large as shown in FIG. 3, the control reaction speed at the tip is delayed, or the right end of the rotary R becomes extremely higher than the set height of the rotary. Or lower. This is because if the rotary mechanism has an automatic plowing depth control mechanism for adjusting the vertical position of the rear cover 8 of the rotary R to an appropriate height with respect to the set height of the rotary, the control mechanism unnecessarily reacts, The problem that the cultivation depth cannot be obtained is caused. Therefore, as shown in FIG. 2, the smaller the lateral swing width during the angle control, the better the tilt control ability. Therefore, when the offset type rotary R protruding from the right side is mounted, the tilt control cylinder 3 is attached to the left lower link 2L side. The offset type rotary may be of a type in which the left side is extended. In a tractor to which this type is mounted, of course, the tilt control cylinder 3 is attached to the right lower link 2R, and the left lower link 2L is attached.
Is supported by the lift link 4.

[0012]

Advantages of the Invention The present invention has the following effects by being configured as described above. That is, in a tractor equipped with a one-sided extended rotary, a horizontal control actuator is attached to the lower link on the opposite side of the work machine projecting (offset) side, so that the rotary swing width at the time of angle control can be small, Since there is no significant vertical displacement relative to the set height, there is no inconvenience of not being able to accurately obtain the set cultivation depth when the cultivation depth automatic control mechanism is provided. You can get it.

[Brief description of the drawings]

FIG. 1 is a plan view of a tractor equipped with an offset rotary.

FIG. 2 is a schematic rear view of a case where an offset type rotary is mounted on a tractor and a tilt control actuator is attached to a lift link on a side opposite to the protruding side.

FIG. 3 is a schematic rear view of a case where an inclination control actuator is attached to the lift link on the protruding side.

[Explanation of symbols]

 T Tractor R Offset type rotary 1 Top link 2L ・ 2R Lower link 3 Cylinder for tilt control 4 Lift link

Claims (1)

(57) [Scope of request for utility model registration] A tilt control actuator is provided on one of the left and right sides of a lift link of a work machine mounting device of a tractor, and the tilt control actuator is provided in an offset type working machine in which one of the left and right sides of the work machine projects sideways. A tilt control mechanism for an offset type working machine, wherein the right and left lift links are attached to a lift link opposite to the protruding side.