JP3219607B2 - Mounting structure of tillage depth sensor on rotary - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a tillage depth sensor in a rotary which controls a tillage depth by detecting a change in tillage depth during tillage work.

[0002]

2. Description of the Related Art Generally, in a cultivator in which a rotary is connected to a rear portion of a traveling machine body, a rotary is raised and lowered in accordance with a change in a tilling depth during a tilling operation, and a tilling depth is maintained at a constant depth.
In order to perform such tillage depth control, it is necessary to always accurately detect the tillage depth. Therefore, at the rear end of the main cover that covers the rotary, a rear cover that rotates up and down in contact with the field scene is provided, and the movement of the rear cover is detected by a rotation sensor to detect the plowing depth. As shown in FIG. 8, a fulcrum shaft a that rotates in connection with the vertical rotation of the rear cover
And the rotation axis c of the rotation sensor b is concentrically fixed to the fulcrum axis a so that the rotation sensor b rotates integrally with the fulcrum axis a.

[0003]

However, if the rotation sensor is concentrically fixed to the rotating fulcrum shaft so as to rotate integrally, as in the prior art, the rotation sensor and the fulcrum shaft are connected. If it is not easy to arrange concentrically, and if the concentricity is not accurate, an excessive force will act on the bearing part of the rotation sensor, and in addition, the rotation sensor that rotates integrally with the fulcrum shaft There is a problem in that the rotation sensor is easily damaged because the rear cover is directly subjected to severe movement. Also, the rear cover,
For example, when the turret is mounted on a ridge, it has a large turning angle that is not necessary for detecting the cultivation depth. Although only about 1/2 to 1/3 of the angle is required for detecting the tillage depth, the operating angle of the rotation sensor must be matched with the large rotation angle of the rear cover. Since the cultivation depth is detected only in a part, the resolution of the angle detection of the rotation sensor within the range required to detect the cultivation depth cannot be made fine,
There is a disadvantage that the detection accuracy of the tillage depth is reduced and the performance of the tillage depth control is also reduced. The present invention has been made in order to solve the above-mentioned problems, and a rotation sensor for detecting a plowing depth can be easily attached, and the rotation sensor is damaged by an excessive force. In addition, the present invention aims to provide a structure for mounting a tillage depth sensor on a rotary, which can improve the detection accuracy of the tillage depth.

[0004]

In order to solve the above-mentioned problems, a technical measure taken by the present invention is to provide a rear cover which pivots up and down in contact with a field scene at the rear end of a main cover. In a rotary configured to detect tillage by detecting rotation by a rotation sensor, a fulcrum shaft that rotates in connection with the vertical rotation of the rear cover is provided, and a rotation pin provided on the fulcrum shaft is rotated. the sensor arm for rotating operating the sensor, and repression against abutted to through the bullet machine, as well as detecting the rotation of the rear cover at a rotational sensor which rotates to follow the pivot axis, to the sensor arm, the rotation of the rotation sensor Is provided in a predetermined range.

[0005]

According to the present invention, the rotation sensor is rotated.
The rotation sensor can be easily mounted simply by causing the sensor arm to be actuated to come into contact with the rotation pin provided on the fulcrum shaft through an elastic machine. When the fulcrum shaft rotates in connection with the vertical rotation of the rear cover, the rotation sensor rotates following the rotation, and detects the rotation of the rear cover. At this time,
An excessive force is not applied to the rotation sensor whose sensor arm is in elastic contact with the rotation pin, and the rotation sensor is not directly subjected to a severe movement of the rear cover. On the other hand, the stopper provided on the sensor arm regulates the rotation of the rotation sensor to a predetermined range even if the rear cover is pivoted largely upward, so that the rotation sensor operates only within the predetermined range. It can be.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, in FIG. 1, reference numeral 1 denotes a rotary connected to a traveling body such as a tractor, and the rotary 1 is configured such that a top mast 2 erected on a support frame is connected to a hitch on the traveling body to be able to move up and down. A rotary tilling unit 3 having a plurality of tilling claws is supported below the support frame. The power transmitted from the PTO shaft of the traveling machine to the input shaft 4 is transmitted to the rotary tilling unit 3 via a chain transmission mechanism housed in the chain case 5. Reference numeral 6 denotes a left-right toolbar supported by a vertically rotatable support frame 7.
The vertical position can be adjusted by an adjusting device 8 disposed between the support frame 7 and the top link 2. 9 is an adjustment operation handle.

Reference numeral 10 denotes an arc-shaped main cover which covers the upper surface of the rotary tilling unit 3 and has a rear end extending rearward via a rotating shaft 11 at a rear end edge of the main cover 10. A rear end of the rear cover 12 contacts the field scene and rotates up and down in accordance with a change in tillage depth while leveling the field scene after tilling. FIG. 1 shows a standard tillage state with a tillage depth of 110 to 140 mm. 13 is a side cover.

A bracket 14 stands on the main cover 10 and supports a left-right fulcrum shaft 15 in a rotatable manner as shown in FIG. A link arm 16 is fixed to one end of the arm, and one end of a rod 17 is rotatably connected to the tip of the link arm 16. On the other hand, a link plate 18 is fixed to the upper surface of the rear cover 12, and the other end of the rod 17 is rotatably connected to a rising portion of the link plate 18. The shaft 15 rotates. 19 is a fixing bolt for the link plate 18. In addition, the bracket 1
At the other end of the fulcrum shaft 15 protruding from 4, a round bar-shaped rotating pin 20 is press-fitted and fixed in a mounting hole of the fulcrum shaft 15,
A pivot pin 20 projects orthogonally from the fulcrum shaft 15.

A sensor mounting plate 21 is fixed to the rotation pin 20 side of the bracket 14, and a rotation sensor 22 is fixed to the sensor mounting plate 21 substantially coaxially with the fulcrum shaft 15. Reference numeral 23 denotes a sensor arm for rotating the rotation sensor 22. The sensor arm 23 is elastically pressed against the rotation pin 20 from below by the urging force of an elastic machine built in the rotation sensor 22. When the rotation of the fulcrum shaft 15 occurs, the rotation sensor 22 rotates to detect the rotation of the fulcrum shaft 15. As shown in FIGS. 5 and 6, the sensor arm 2 for rotating the rotation sensor 22 is operated.
3 is provided with a regulating body 24 projecting therefrom.
When the rotation sensor 22 rotates to a predetermined range, the stopper 24 comes into contact with the stopper 25 to stop the rotation of the sensor arm 23, and the rotation of the sensor arm 23 is stopped.
Even if the fulcrum shaft 15 is further linked to the rear cover 12 and further rotated, the rotation sensor 22 from which the elastic contact of the sensor arm 23 with the rotation pin 20 has been released can be operated at the operating angle required to detect the plowing depth. It is regulated so that it does not rotate.
Reference numeral 26 denotes wiring for connecting the rotation sensor 22 and the tillage depth control mechanism on the traveling machine body. The tillage depth control mechanism raises and lowers the rotary 1 based on the detection of the rotation sensor 22 so that the tillage depth becomes constant. Control. Reference numeral 27 denotes a pressure rod for the rear cover 12.

In the above-described configuration, if the rear cover 12 rotates up and down along the field scene during the tilling operation, the fulcrum shaft 15 rotates in conjunction with the rotation, and the rotation rotates following the fulcrum shaft 15. The sensor 22 can detect rotation of the rear cover 12 to detect a change in tillage depth. The rotation sensor 22 only needs to press the sensor arm 23 against the rotation pin 20 of the fulcrum shaft 15 with elastic pressure.
2 is easy to mount, and the rotation sensor 22 and the fulcrum shaft 1
5 is not exactly concentric, no excessive force acts on the bearing portion, and the movement of the rear cover 12 is applied to the rotation sensor 22 via the sensor arm 23 connected elastically. Since the rotation is transmitted, there is no fear that the rotation sensor 22 is directly damaged by the severe movement of the rear cover 12 and is damaged. Then, even if the rear cover 12 is pivoted largely upward, the rotation sensor 22 is
Since the third regulating body 24 does not rotate beyond the predetermined range necessary for detecting the tillage depth by contacting the stopper 25, the rotation sensor 22 is operated only within the predetermined range to improve the detection accuracy of the tillage depth. Can be done.

[0011]

In summary, the present invention is to provide a rear cover which is turned up and down in contact with a field scene at the rear end of a main cover, and detects the rotation of the rear cover with a rotation sensor to detect the plowing depth. In the rotary described above, a fulcrum shaft that rotates in connection with the up and down rotation of the rear cover is provided, and a rotation pin provided on the fulcrum shaft is provided with a sensor arm for rotating a rotation sensor. Since the rotation of the rear cover is detected by a rotation sensor that rotates following the fulcrum shaft by contacting with the elastic pressure via the sensor arm, the sensor arm is provided with a stopper that regulates the rotation of the rotation sensor to a predetermined range. While the rotation sensor detects the rotation of the fulcrum shaft linked to the vertical rotation of the rear cover, it does not rotate the rotation sensor concentrically on the fulcrum shaft, but simply rotates on the rotation pin provided on the fulcrum shaft. rotating the sensor The sensor arm to kinematic only to repression abutment, can be easily attached. The rotation sensor, whose sensor arm presses against the pivot pin of the fulcrum shaft, does not receive excessive force and does not directly receive the violent movement of the rear cover, so the rotation sensor is accidentally damaged. There is no fear. On the other hand, even if the rear cover is largely moved upward, the stopper provided on the sensatum restricts the rotation of the rotation sensor to a predetermined range, so that the rotation sensor operates only within the predetermined range to improve the detection accuracy. Is what you can do.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is an enlarged side view of a main part.

FIG. 3 is an enlarged side view of a main part in a state where a rear cover is largely moved upward.

FIG. 4 is a plan view of a main part.

FIG. 5 is a side view showing an operation state of a link arm and a sensor arm when a rear cover is moved downward.

FIG. 6 is a side view showing an operation state of the link arm and the sensor arm when the rear cover is moved upward.

FIG. 7 is a side view showing an operation state of the link arm and the sensor arm when the rear cover is largely moved upward.

FIG. 8 is a plan view of a conventional example.

[Explanation of symbols]

 Reference Signs List 10 main cover 12 rear cover 15 fulcrum shaft 20 rotation pin 22 rotation sensor 23 sensor arm 25 stopper

Claims (1)

(57) [Claims] A rotary cover provided at the rear end of the main cover to rotate vertically in contact with a field scene, wherein the rotation of the rear cover is detected by a rotation sensor to detect a plowing depth. of in tandem in the vertical pivot provided fulcrum shaft which rotates, the rotation pin provided in the fulcrum shaft, the sensor arm to rotate actuating the rotation sensor, and repression against abutted to through the bullet machine, pivot shafts A rotation sensor that rotates following the rotation sensor to detect rotation of the rear cover, and the sensor arm has a stopper that restricts rotation of the rotation sensor to a predetermined range. Construction.