JPH0570240U - Rotating device for cutting unit - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a rotating device for a mowing unit that can hold the mowing unit horizontally when the mowing unit is raised. [Structure] A hydraulic cylinder supported by a rotation fulcrum of the mowing section moves in conjunction with the mowing lift cylinder, so that the mowing section is always held horizontally.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a turning device for a cutting unit in a combine.

[0002]

[Prior Art]

 The conventional reaper is designed to be lifted and lowered by a reaper lift cylinder.

[0003]

[Problems to be solved by the device]

 There are the following problems in the conventional method of raising and lowering the reaper by only the reaper lift cylinder. (1) When performing felling harvesting or wetland harvesting, the reaping unit is set to the ground just before the work, so the weeding board plunges into the ground and the stock dropout occurs, making continuous work impossible. (2) When raising the mowing part, the relative size with the mowing part cannot be reduced to secure a clearance between the driver's seat and the cabin. The object of the present invention is to solve the above-mentioned conventional drawbacks and to provide a rotating device of a mowing unit that can always hold the mowing unit horizontally when the mowing unit rises.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides the following rotation device for the cutting unit. That is, the other end of the hydraulic cylinder supported by the rotation fulcrum of the mowing unit is attached to a rotatable mowing frame, and the hydraulic cylinder is configured to move in conjunction with the mowing lift cylinder. It is a moving device.

[0005]

[Action]

 The hydraulic cylinder supported by the rotation fulcrum of the mowing section works in conjunction with the mowing lift cylinder to keep the mowing section always horizontal.

[0006]

【Example】

 Embodiments shown in the drawings will be described below. First, the conventional lifting and lowering device for the mowing section will be described. As shown in FIG. 3, the mowing section is provided with a weeding board 1, a raising device 2, and a not-shown mowing device and a grain culm conveying device provided in the mowing frame 3. The reaping lift cylinder 5 moves up and down around the rotation fulcrum 4. With such a structure, as the mowing frame rotates, the mowing section inclines upward, and the supporting frame 6 of the raising case 2 rises to a position where it does not touch the cabin 7. Therefore, when the reaper is raised, the relative size with the reaper cannot be reduced in order to secure a gap with the cabin. In addition, when performing felling harvesting or wetland harvesting, the cutting section is set to the very limit of the ground, and the grass board 1 sometimes plunges into the ground, causing a stock dropout and continuous work cannot be performed.

The present invention has been devised in order to solve the above-mentioned conventional drawbacks, and as shown in FIG. 1, a bracket 10 that rotates about a rotation center 9 at a mounting portion of a raising case support frame 6 for a mowing fulm. The bracket 11 is provided with an upright arm 11 and a hydraulic cylinder 8 is provided between the arm 11 and the rotation fulcrum 4 of the mowing frame 3 so that the base end of the hydraulic cylinder 8 is at the rotation fulcrum 4. The piston rod 12 of the hydraulic cylinder 8 is pivotally supported on the upper end of the arm 11. Then, as shown in FIG. 2, hydraulic pressure is guided from the hydraulic pump 13 to the electromagnetic switching valve 14 via the oil passage 15 so that the reaper lifting cylinder 5 and the hydraulic cylinder 8 move in an interlocking manner, and the oil passages 16 and 17 are respectively cut. Connect to lifting cylinder 5 and hydraulic cylinder 8. Incidentally, reference numeral 18 in FIG. 2 denotes a safety valve connected to the bypass 19. With the above configuration, the hydraulic pressure from the pump 13 simultaneously acts on the mowing lifting cylinder 5 and the hydraulic cylinder 8, so that the mowing lifting cylinder 5 and the hydraulic cylinder 8 work together.

[0008] Therefore, when the reaper is raised, by energizing the solenoid so as to move the electromagnetic switching valve 14 from the illustrated position to the left, the piston rod 12 of the hydraulic cylinder 8 projects as the reaping frame 3 rises, The bracket 10 is rotated about a rotation center 9 to interlock with the mowing lifting cylinder 5 so as to keep the mowing frame 3 always horizontal. In order to keep it always horizontal, a potentiometer is provided on the rotation fulcrum 4 to detect the rotation angle of the hydraulic cylinder 8, and the electromagnetic throttle valve is adjusted based on the detected value via a control device (not shown). It is configured so that the amount of oil to the hydraulic cylinder 8 can be adjusted. Then, as shown in FIG. 1, since the mowing frame 3 is always kept horizontal, the conventional defects can be solved.

[0009]

[Effect of the device]

 According to the present invention, since the mowing frame is always kept horizontal, it can be easily returned to the ground without plunging into it. Therefore, at the time of lodging, the sward board can be set just to the ground, and the lodging grain culms can be sufficiently weeded. In addition, since the distance between the driver's seat and the raising case can be shortened sufficiently, the forward visibility is improved and the body size can be shortened.

[Brief description of drawings]

FIG. 1 is an operation explanatory diagram of the device of the present invention.

FIG. 2 is a hydraulic circuit of the device of the present invention.

FIG. 3 is an operation explanatory diagram of a conventional device.

[Explanation of symbols]

 3 Mowing frame 4 Pivoting fulcrum 5 Mowing lift cylinder 7 Cabin 8 Hydraulic cylinder

Claims (1)

[Scope of utility model registration request] 1. A mowing unit configured such that the other end of a hydraulic cylinder supported by a rotation fulcrum of the mowing unit is attached to a rotatable mowing frame, and the hydraulic cylinder moves in conjunction with a mowing lift cylinder. Rotation device.