JP2556924Y2 - Work machine offset mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an offset amount of a working machine, such as an agricultural working machine, by sliding a gear box having a connecting portion to a towing vehicle with respect to a main frame from side to side. The present invention relates to an offset mechanism that adjusts the offset.

[0002]

2. Description of the Related Art Conventionally, a main frame extending in the left-right direction, a gear box having a connecting portion to a towing vehicle and an input shaft receiving power from the towing vehicle, and transmitting power to a working portion by receiving power from the gear box. The following is known as a working machine having a transmission shaft, in which the amount of offset of the working machine with respect to a towing vehicle in the left-right direction is adjusted. The main frame and gearbox are fixed integrally, and the connection to the towing vehicle is moved left and right by a link mechanism. A connection part and a gear box are slid with respect to a power transmission shaft, and power is transmitted from the power transmission shaft to a working part via a telescopic universal joint.

[0003]

However, the above-mentioned prior art has the following problems. In this case, the positional relationship between the gearbox and the connecting portion of the towing vehicle changes, so that power transmission from the towing vehicle to the input shaft is not transmitted at a specified angle. In the case of (1), the amount of expansion and contraction of the universal joint is limited, and a large offset amount cannot be adjusted. The present invention has been made to solve the above problems.

[0004]

In order to achieve the above object, the present invention provides a main frame 1 extending in the left-right direction.
A gear box 3 connected to the main frame 1 via a parallel link 2 so as to be movable in the left-right direction, and having a connecting portion 4 to the towing vehicle and an input shaft 5 receiving power from the towing vehicle.
And a transmission shaft 7 composed of a spline shaft or a square shaft which is slidably fitted into the gear box 3 and extends in the left-right direction with one end being a free end, and attached to the other end of the transmission shaft 7. And a universal joint 8 for transmitting power to the working section, wherein the offset amount of the working machine is adjusted by sliding the gear box 3 in the left-right direction along the transmission shaft 7. .

[0005]

With the construction described above, the offset mechanism of the working machine of the present invention moves the gearbox 3 having the connecting portion 4 to the towing vehicle and the input shaft 5 receiving power from the towing vehicle in the left-right direction along the transmission shaft 7. The power transmission from the towing vehicle to the input shaft 5 can be performed at a predetermined angle without changing the positional relationship between the gearbox 3 and the connecting portion 4 of the towing vehicle because the offset amount of the working machine is adjusted by sliding the power tool. Conveyed in. Further, the universal joint 8 covers the misalignment when the gear box 3 moves along the transmission shaft 7 by the parallel link 2, and the universal joint 8 itself does not expand and contract, so that the offset amount can be increased.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a main frame of a rotary tilling device mounted via a three-point link mechanism at a rear portion of a riding type tractor (towing vehicle) (not shown), and extends in the left-right horizontal direction. A gear box 3 is connected to the main frame 1 via a parallel link 2 so as to be movable in the left-right direction. Gear box 3
On the left and right sides of the front of the vehicle, connecting portions 4 and 4 for connecting to the towing vehicle are provided, and an input shaft 5 receiving power from the towing vehicle protrudes forward from the gear box 3. A transmission shaft 7 composed of a spline shaft or a square shaft is slidably fitted in the sleeve 6 of the gear box 3 and extends in the left-right direction. One end of the transmission shaft 7 is a free end, and a universal joint 8 that does not expand and contract is attached to the other end. ing. The power received by the input shaft 5 is transmitted to the transmission shaft 7 via the sleeve 6 while changing the transmission direction by the bevel gears 11 and 12.

The offset amount of the working machine is adjusted by sliding the gear box 3 in the left-right direction along the transmission shaft 7 via the parallel link 2.
1 and FIG. 2 show a state where the work machine is most offset to the right, FIG. 1 shows an M position and FIG. 3 shows an intermediate position of the offset, FIG. 1 shows an N position and FIG. I have. 5 and 6 show the operation of the parallel link 2 and the universal joint 8 at the time of this offset. In this embodiment, the effective length of the parallel link 2 is 283 mm, the offset angle of the working machine is 90 degrees, the offset movement amount is 400 mm, and the maximum movement amount between the main frame 1 and the transmission shaft 7 is 83 mm.
It is. The universal joint 8 has an effective length of 166 mm, a maximum bending angle of 30 degrees, and a maximum movement amount at the time of maximum movement between the main frame 1 and the transmission shaft 7 of 83 mm.

In the rotary tilling apparatus having such a configuration, the connecting portions 4 and 4 are connected to and mounted on the rear portion of the tractor via a three-point link mechanism. Power is transmitted to the input shaft 5 from the PTO shaft of the tractor, the speed is changed by the bevel gears 11 and 12 in the gear box 3, and the power is transmitted to the transmission shaft 7 via the sleeve 6 while changing the transmission direction. . Furthermore, the rotation shaft 10-the sprocket wheel 9 from the transmission shaft 7 via the universal joint 8
The power is transmitted to the power unit to drive the working unit (tiling rotor), and the tilling work is performed.

The adjustment from the state where the work machine is most offset to the O position in FIG. 1 and the right side shown in FIG. 2 to the N position in FIG. 1 and the state where no offset is performed in FIG. When the parallel links 2 and 2 are rotated clockwise from the O position in FIG. 1 and the state in FIG. 2, the gear box 3 and the connecting parts 4 and 4 to the towing vehicle are connected by the sleeve 6 of the gear box along the transmission shaft 7. The main frame 1, the universal joint 8, the sprocket wheel 9, the rotating shaft 10, and the like move relatively to the left by sliding and moving rightward, and the offset amount changes. The position M in FIG. 1 and FIG. 3 show the intermediate position of the total offset, from which the further rotation of the parallel links 2, 2 in the clockwise direction shows the gearbox 3 and the connections 4, 4 to the towing vehicle. It can be moved to the N position of 1 and the state where the offset is not shown in FIG. At this point, the offset amount of the working machine becomes zero.

If the rotation of the parallel links 2 and 2 is regulated in the process of changing the offset amount of the working machine as described above, the desired offset position can be maintained. In this embodiment, the working machine is configured to be offset only to the right in the drawing. However, in order to allow the working machine to be offset to the left, the configuration described above may be reversed.
Further, the M position in FIG. 1 and the state in FIG. 3 in the above embodiment are set to an intermediate position where the working machine is not offset, and the connecting portion 4,
By moving 4 to the left or right, the offset direction of the working machine can be set to either left or right.
In this case, the maximum offset amount becomes half that of the above embodiment.

[0011]

As described above, according to the working machine offset mechanism of the present invention, the gearbox 3 having the connecting portion 4 to the towing vehicle and the input shaft 5 receiving power from the towing vehicle.
Is slid in the left and right direction along the transmission shaft 7 having one end as a free end, so that the offset amount of the working machine is adjusted, so that the positional relationship between the gear box 3 and the connecting portion 4 of the towing vehicle is changed. Power does not always change, and power transmission from the towing vehicle to the input shaft 5 is transmitted at a specified angle, and smooth power transmission is performed. The universal joint 8 covers misalignment when the gear box 3 moves along the transmission shaft 7 by the parallel link 2,
It does not itself expand and contract, and can increase the offset amount.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of an offset mechanism according to an embodiment of the present invention.

FIG. 2 is a partial rear view in a state where a work machine is most offset.

FIG. 3 is a partial rear view of the work machine at an intermediate offset position.

FIG. 4 is a partial rear view in a state where the work machine is not offset.

FIG. 5 is an explanatory view of the operation of the parallel link when the work implement is offset.

FIG. 6 is a diagram illustrating the operation of the universal joint when the work implement is offset.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main frame 2 Parallel link 3 Gear box 4 Connecting part to towing vehicle 5 Input shaft 6 Sleeve 7 Transmission shaft 8 Universal joint 9 Sprocket wheel 10 Rotating shaft 11, 12 Bevel gear

Claims (1)

(57) [Scope of request for utility model registration] A main frame (1) extending in the left-right direction.
And the main frame (1) is connected to the main frame (1) via a parallel link (2) so as to be movable in the left-right direction.
(4) a gearbox (3) having an input shaft (5) for receiving power from a towing vehicle; and the gearbox (3).
Is slidably fitted, a transmission shaft comprising a spline shaft or square shaft (7) is extended in the lateral direction as a free end at one end, attached to the other end of said transmission kinematic shaft (7) relative to the work And a universal joint (8) for transmitting power to the part, and the gearbox (3) is slid left and right along the transmission shaft (7) to adjust the offset amount of the working machine. An offset mechanism for a working machine.