JP2594935Y2 - Rotary device - Google Patents

Description

[Detailed description of the invention]

[0001] The present invention relates to a rotary device which automatically controls the plowing depth by vertically moving a rear cover pivotally attached to a rear end of a main cover.

[0002]

2. Description of the Related Art Generally, in a rotary device which is connected to a tractor or the like so as to be able to move up and down at the rear, a rear cover is pivotally attached to a rear end of a main cover which covers the rotary, and a tail wheel connected to a control device is provided above the main cover. When a rear cover moves up and down to detect a change in tillage depth with a support, a pressure rod that connects the rear cover and the tail wheel support moves the tail wheel support up and down to automatically control the plowing depth. ing.

[0003]

However, the main cover that covers the rotary is rotated to change the mounting position according to working conditions and the like. When the main cover is rotated, it is pivotally attached to the main cover. The position of the rear cover is also changed, so that the length of the pressure rod connecting the rear cover and the tail wheel support must be adjusted each time, so that the operation of adjusting the pressure rod is complicated. The present invention has been made in view of the above-described situation, and even if the main cover is rotated to change the mounting position, the length of the pressure rod can be automatically adjusted to securely support the rear cover. It is an object of the present invention to provide a rotary device capable of performing such operations.

[0004]

In order to solve the above-mentioned problems, a technical measure taken by the present invention is to pivotally mount a rear cover at a rear end of a main cover which covers a rotary, and to control a rear cover above the main cover. In a rotary device in which a vertically movable tail wheel support connected to the device is extended rearward, the main cover, the rear cover and the tail wheel support are respectively provided with tip portions of three rods pivoted radially. A pressure rod that is rotatably connected and supports a rear cover with the three rods that rotate relative to each other.

[0005]

Therefore, according to the present invention, when the rear cover moves up and down, the pressure rod supporting the rear cover moves
Three rods, which are radially connected and are respectively connected to the main cover, the rear cover, and the tail wheel support, rotate mutually, and the three rods cooperate to form a tail wheel support connected to the control device. Move up and down to automatically control the plowing depth. When the mounting position is changed by rotating the main cover, the three rods pivotally connected to each other rotate to move the position of the rod connected to the rear cover. Therefore, even if the position of the rear cover changes, the rear cover can be reliably supported without adjusting the pressure rod.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the side view shown in FIG. 1, reference numeral 1 denotes a rotary device, and the rotary device 1 includes a tractor 2.
Left and right lower links 3 provided below the rear of the tractor 2
It is detachably attached to a hitch frame 5 attached to a top link 4 provided at the center of the rear surface. The ends of the left and right lift arms 7 projecting from the hydraulic case 6 and the lower link 3 are connected by a lift rod, and the rotary device 1 can be moved up and down by the rotation of the lift arm 7. Reference numeral 8 denotes a top mast rotatably locked to an upper end portion 5a of the hitch frame 5, and the top mast 8 supports a left-right arm 9 connected to a lower end side of the hitch frame 5.
The rotary 10 is pivotally supported by side frames provided at both ends of the arm 9. Reference numeral 11 denotes an arc-shaped main cover that covers the upper part of the rotary 10.
Numeral 1 is supported by a telescopic support arm 12, and the main cover 11 is rotated back and forth according to working conditions and the like to change the mounting position. 13 is a chain case.

Reference numeral 14 denotes a pair of left and right tail wheel supports extending rearward from an upper position of the rotary 10, and the tail wheel support 14 is supported by a front end rotation shaft 15 so as to be vertically rotatable. A guide tube 16 to which the tail wheel can be detachably attached is provided at the rear end. Also 17
Is a sensor arm that is vertically provided at the front end of the tail wheel support 14, and the sensor arm 17 is connected via a wire 18 to a control device that moves the rotary device 1 up and down. 1
A connecting bar 9 connects the left and right tail wheel supports 14. A tail wheel adjusting device 20 is provided between the central portion of the connecting bar 19 and the top mast 8. That is, 2
Reference numeral 1 denotes a swingable bracket provided at the protruding end of the top mast 8, reference numeral 22 denotes a slidable cylinder supported by a bracket 21, and a female screw pipe 23 having an internal thread carved on the inner surface thereof rotates. And a handle 24 is mounted on the upper end thereof. A male screw rod 25 is screwed to a lower side of the female screw pipe 23, and a lower end of the male screw rod 25 is rotatably connected to the connection bar 19. 26 is the cylinder 2
2 through which the pin 26 and the bracket 2
A spring 27 that presses and urges the female screw pipe 23 downward is interposed between the spring 27 and the spring 1. Female thread pipe 23
A plate member 28 is integrally fixed to the, and a fixing pin 29 penetrating the plate member 28 and the bracket 21 is provided. Then, the plate member 28 is fixed to the bracket 21 by the fixing pin 29.
, The tail wheel adjusting device 20 as a whole
When the tail wheel support 14 is positioned and the handle 24 is operated, the height of the tail wheel support 14 can be adjusted by the male screw rod 25 that protrudes and retracts from the female screw pipe 23, and if the fixing pin 29 is loosened to release the fixing. The slidable cylinder 22 is urged downward by the spring 27, and the tail wheel support 14 is vertically movable against the spring 27.

Reference numeral 30 denotes a vertically movable rear cover extending rearward from the main cover 11.
Numeral 0 is pivotally supported at the rear end of the main cover 11 via a left-right support shaft 31 so that the rear end of the rear cover 30 contacts the ground surface. And the rear cover 30
Is supported by a pressure rod 32 composed of three rods. That is, the base ends of the three rods 33, 34, 35 are radially connected at the same pivot point A, and the tip of the upward rod 33 is provided on the tail wheel support 14.
To form a swinging rod that can swing back and forth with the fulcrum shaft B as the axis, and connect the tip of the rod 34 facing rearward to a fulcrum shaft C provided on the upper surface of the rear cover 30 to connect the rear cover 30. A connecting rod to be supported is formed, and a forward-facing rod 35 is connected to a fulcrum shaft D provided on the upper surface of the main cover 11 to form a rotating rod that rotates vertically about the fulcrum shaft D as an axis. ing. When the rear cover 30 moves up and down, the rods 34 and 35 rotate relative to each other in conjunction with the rod 33 supporting the rear cover 30, and the cooperation of the three rods 33, 34 and 35 causes the tail wheel support 14 to move. The pressure rod 32 which moves up and down is constituted.

In the above construction, during the tilling operation, if the cultivation depth increases, the rear cover 30 is pushed by the ground surface and moves upward, and if the cultivation depth decreases, the rear cover 30 moves downward by its own weight. If the fixing pin 29 of the tail wheel adjusting device 20 is loosened so that the tail wheel support 14 can be moved up and down, when the rear cover 30 is moved upward, the rear wheel 30 is composed of rods 33, 34, 35 radially connected. Pressure rod 32
First, the rod 34 connected to the rear cover 30 by the fulcrum shaft C is pushed by the rear cover 30 and moves upward, and the rod 35 heading forward from the pivot point A is rotated upward about the fulcrum shaft D as an axis. . At this time, since the position of the fulcrum axis D provided on the main cover 11 does not move, the pivot point A is displaced upward and forward, and the fulcrum axis B is pushed up while swinging the upwardly moving rod 33 forward. The wheel support 14 is moved upward. When the rear cover 30 moves down, the rods 33, 34 and 35 constituting the pressure rod 32 operate in the opposite direction to move the tail wheel support 14 down. Then, the sensor arm 17 suspended from the tail wheel support 14 pushes and pulls the wire 18 to move the rotary device 1 up and down, so that the plowing depth can be automatically controlled.

On the other hand, when the main cover 11 is rotated,
When the mounting position is changed as shown in FIG. 7, the rod 35 connected to the main cover 11 is pushed rearward, but the rod 33 connected to the tail wheel support 14 via the fulcrum shaft B swings rearward to pivot the pivot point A. Is displaced about the fulcrum axis B, and the position of the rod 34 connected to the rear cover 30 is moved. Therefore, even if the position of the rear cover 30 is changed, the rod 34 that moves rearward and downward from the pivot point A cannot be used. The rear cover 30 can be supported. Therefore, there is no need to adjust the pressure rod 32 each time the main cover 11 is rotated.

If the tail wheel is attached to the guide tube 16 of the tail wheel holder 14, the till depth can be controlled automatically by sensing the ground surface by the tail wheel. If fixed to the bracket 21, the plowing depth can be adjusted by operating the handle 24 manually.

[0012]

According to the present invention, a rear cover is pivotally mounted on a rear end of a main cover for covering a rotary, and a vertically moving tail wheel support connected to a control device is directed rearward above the main cover. In the extended rotary device, the main cover, the rear cover, and the tail wheel support are rotatably connected to tip portions of three rods radially pivoted, respectively, so that the three rods pivot with respect to each other. When the rear cover moves up and down along the ground surface, the pressure rod supporting the rear cover is pivoted radially and connected to the main cover, rear cover and tail wheel support, respectively. The three rods are rotated with each other to move the tail wheel support up and down by cooperation of the three rods, so that the tail wheel support is connected. It can be automatically controlled to an appropriate tilling depth in the control device. Even if the main cover is rotated to change the mounting position, the three rods radially connected to each other rotate to move the position of the rod connected to the rear cover, so the pressure rod is adjusted each time. This allows the rear cover to be reliably supported without performing the tillage operation.

[Brief description of the drawings]

FIG. 1 is an overall side view at the time of deep plowing.

FIG. 2 is an overall side view at the time of shallow tillage with a main cover rotated.

[Explanation of symbols]

 Reference Signs List 10 rotary 11 main cover 14 tail wheel support 30 rear cover 32 pressure rod 33 rod 34 rod 35 rod

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotary device in which a rear cover is pivotally attached to a rear end of a main cover that covers a rotary, and a vertically moving tail wheel support connected to a control device extends rearward above the main cover. The distal ends of three radially pivoted rods are rotatably connected to the main cover, the rear cover, and the tail wheel support, respectively, and the rear cover is supported by the three rods that rotate relative to each other. A rotary device comprising a pressure rod.