JP2507939B2 - Rolling control device for agricultural machinery - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rolling control device for an agricultural work machine.

[Prior art]

As an example of conventional technology, Japanese Utility Model Laid-Open No. 61-115014 discloses
Inclination detection means for detecting the inclination of the machine body in the left-right direction, a rolling control hydraulic valve that is interlocked with the inclination detection means by a mechanical connection means and is switched by the operation of the inclination detection means, and expansion / contraction by switching the hydraulic valves. A rolling control device for an agricultural working machine, comprising a rolling control hydraulic cylinder that operates to roll the machine body to the left and right, wherein the tilt detection means includes a ground sensor that moves up and down by the tilt of the machine body in the left and right directions. Provided and configured,
It is disclosed that the grounding sensor is provided with a rolling lock means that disables the rolling operation of the machine body in a state where the grounding sensor cannot move up and down at a neutral position.

[Problems to be Solved by the Invention] In the above-mentioned prior art, since the left and right grounding sensors cannot be moved up and down at the vertical neutral position during rolling lock, when the vehicle is running in the rolling lock state, If the ground sensor touches an obstacle on the ground, or the ground sensor touches an obstacle on the ground too much, the left and right ground sensors will be overloaded and deformed or damaged by the ground sensor or the connecting means with the rolling control hydraulic valve. May occur.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention relates to an inclination detecting means for detecting the inclination of the body in the left-right direction, and a rolling control which is interlockingly connected with the inclination detecting means by a mechanical connecting means and is switched by the operation of the inclination detecting means. A rolling control device for an agricultural work machine, comprising: a hydraulic valve for operation; and a rolling control hydraulic cylinder that rolls the machine body left and right by expanding and contracting by switching the hydraulic valve. A pendulum sensor that swings to the left or right depending on the inclination of the pendulum sensor, and the pendulum sensor is provided with rolling lock means configured to lock the body in a state in which the pendulum cannot swing in the left and right neutral positions. And a rolling control device for an agricultural work machine.

[Operation and effect of the invention]

The rolling control device for an agricultural work machine configured as described above has a pendulum sensor that swings the pendulum sensor to the left and right with respect to the machine body when the machine body tilts in the left-right direction, causing the machine body to perform a rolling operation, and switching the rolling lock means to a locked state. Is unable to swing to the left or right at the left-right neutral position, and the aircraft becomes inoperable.

Therefore, the rolling control device for an agricultural work machine according to the present invention is provided with a pendulum even when the vehicle is tilted greatly to the left or right or an obstacle is present on the ground while traveling in a rolling lock state. Since the sensor is not subjected to an excessive load, there is no risk of deformation or damage to the sensor unit or the connecting means with the rolling control hydraulic valve, unlike the prior art.

〔Example〕

 Hereinafter, an embodiment shown in the drawings will be described.

The transplanter 1 shown in FIG. 1 and FIG. 2 is a rice transplanter, in which the engine 3 is arranged in the front part of the mission case 2 and the transmission housings 5, 5 projecting laterally from the mission case 2.
A chain case (6, 6) is provided at the front end of the chain (1) so as to be vertically rotatable so that the chain (6) can be turned upside down. There is. Further, a transmission case 9 extending rearward is integrally assembled to a rear portion of the transmission case 2, and a handle which doubles as a planting portion 10 and a mounting frame at a rear end portion of the transmission case 9.
11 are provided. The planting section 10 is a seedling tank 15 and a planting device.
Comes with 19. The seedling tank 15 is slidably supported by a rail 12 attached to a handle 11 and a support frame 13, and is a lateral movement device.
It is reciprocated laterally by 14. Also, planting equipment
19, the planting rod 17 moves up and down in a predetermined orbit,
The planting claw 18 provided at the tip portion divides the seedling from the seedling mat held in the seedling tank 15 and takes it out to plant it in the field. A fuel tank 21 is provided on the upper part of these machines. A float 24 is provided on the lower side of the machine body. A rear portion of the float 24 is pivotally attached to a base portion of the handle 11 through a support shaft 25 so as to be vertically rotatable, and a front portion of the float 24 is supported by an expansion / contraction link 26 in a state of being suspended from the engine base 3a.

The towing wheels 7 and 7 are moved up and down with respect to the machine body by a hydraulically operated lifting device 30. A hydraulic device 31, which is a drive source of the lifting device, is provided in the upper part of the mission case 2, and rotational power is transmitted to the hydraulic pump from the engine 3 via the belt 32. A main cylinder 34 is fixedly provided on the rear surface of the hydraulic device 31, and a balance rod 35 is pivotally attached to a rear end portion of the main cylinder so as to be swingable in a horizontal plane, and further, the balance rod 35. The left and right ends of the are connected by connecting rods 36, 36 to arms 38, 38 fixed to the bases of the chain cases 6, 6. A sub-cylinder 39 is provided in an intermediate portion of the left side connecting rod 36L among the connecting rods 36L and R.

The main cylinder 34, by switching a control valve (not shown) according to the vertical movement of the float 24,
It can be expanded and contracted.

On the other hand, the sub-cylinder 39 is a hydraulic cylinder for rolling control that expands and contracts to roll the machine body to the left and right, and a valve 41 for rolling control is provided in the hydraulic device 31.
Is provided at the rear end portion of the support plate 42 extending rearward from the above, and is expanded and contracted by switching the valve 41 in conjunction with the inclination detection device 43 shown in FIGS. 3 and 4. The tilt detecting device 43 is a pendulum sensor (hereinafter simply referred to as a pendulum) in which a weight 45b is fixed to a lower end of a rod 45a.
5 is rotatably supported by a shaft 46 in the front-rear direction, and the pendulum 45 can freely swing left and right within a plane perpendicular to the traveling direction of the machine body. The pendulum 45 is elastically connected to the transmission case 9 by a sensitivity adjusting spring 47 whose tension can be adjusted. A lever arm 49 is integrally attached to the base of the pendulum 45, and the valve rod 41a is moved up and down by the rotation of the lever arm 49 to switch the valve 41. The lever arm 49 and the valve rod 41a serve as detection means for detecting the amount of shake of the pendulum 45. When the pendulum 45 is located in the center, the valve 41 is in a neutral state, and when the pendulum 41 swings to the right with respect to the machine body, the valve 41 switches in the direction of extending the sub-cylinder 39, and when swinging to the left, the sub-cylinder 41 contracts. The valve 41 switches in the direction. This inclination detection device 43, as is clear from the figure,
Tow wheel shafts 7a, 7a in the left and right center of the machine when viewed from the side.
Is provided above the vicinity of.

When using this rice transplanter 1 in a paddy field, float 24
The valve of the main cylinder 34 is switched according to the vertical movement of the. When the main cylinder 34 expands and contracts, the left and right traction wheels 7 simultaneously move up and down by the same amount.

When the machine body tilts to the left or right due to the unevenness of the soil surface of the field, the pendulum 45 swings with respect to the machine body, whereby the valve 41 is switched to the proper direction. For example, when the aircraft is at the upper left, the pendulum 45 swings to the right with respect to the aircraft.
Extends and rotates the left chain case 6 upward, and the left wheel 7L rises to return the aircraft to a horizontal state. On the contrary, when the airframe descends to the left, the pendulum 45 swings to the left with respect to the airframe, so that the sub-cylinder 39 contracts and the left wheel 7L is lowered. In this way, since the left and right inclinations are detected by the swing of the pendulum 45, it is possible to perform accurate horizontal control without erroneously sensing irregularities on the surface soil surface of the field.
In addition, since the inclination can be detected even when the float 24 is lifted from the surface soil, such as when turning,
Good steering stability when turning. Wheel axles 7a, 7 in plan view
By providing the inclination detection device 43 in the vicinity of the line connecting a, it is possible to detect an accurate inclination even during turning.
When the unevenness of the surface soil is severe, the sensitivity adjustment spring 47
A smooth control can be performed by increasing the tension of to make the swing of the pendulum insensitive. The sensitivity adjusting spring 47 also functions as a rolling lock means, and if the tension is increased above a certain level, the pendulum 45
Becomes incapable of swinging, and the rolling control hydraulic valve 41 cannot be switched, so that the machine becomes inoperable.

5 to 7 show different embodiments of the present invention. The inclination detecting device 50 includes a pair of right and left swing links 52 and 52 supported by shafts 51 and 51 and lower end portions of the pair of links. A pendulum sensor including a connecting link 53 to be connected and a weight 54 fixed to the central portion of the connecting link is provided. A lever arm 55 is integrally provided at the base of one swing link 52R, and the valve rod 41a of the sub-cylinder 41 is connected to this. The weight 54 is biased toward the neutral position by a sensitivity adjusting spring 56 whose tension can be adjusted by operating a wire. Further, stopper springs 57, 57 for restricting the swing range of the left and right swing links 52, 52 are provided outside the swing links 52, 52. Furthermore, below the weight, there is a lock arm that is rotated back and forth by operating the lock wire 58.
59 is provided, and the swinging of the weight 54 can be locked by engaging the engagement groove 59a of this arm with the engagement plate 54a vertically provided on the weight.

This tilt control device 50 will
When 53 moves rightward, the swing link 52R pushes the valve rod 41a to move the valve 41 to the sub-cylinder 39.
The valve 41 is switched to the direction in which the sub-cylinder 39 is contracted when the aircraft is moved downward to the left. Since the stopper springs 57, 57 are provided, the swing links 52, 52 do not swing beyond a predetermined range, and the momentum of sudden swings is absorbed, so smooth movement is possible. Control is performed. When the unevenness of the soil surface of the field is severe or when the vehicle travels on the road, the weight can be locked by the lock arm 59, which is a rolling lock means, to render the machine inoperative for rolling.

This tilt control device 50 includes swing links 52, 52 and connecting link 5
3, the weight 54 is formed like a seesaw, but this is also 1
It can be called a seed pendulum. Lever arm 55 and valve rod 41a
Is the pendulum deflection amount detector and the spring for sensitivity adjustment
56 is an adjusting means for adjusting the swing strength of the pendulum.

[Brief description of drawings]

FIG. 1 is a side view of an example of a rice transplanter, FIG. 2 is a plan view thereof,
FIG. 3 is a rear view of an example of the inclination detecting device, FIG. 4 is a side view thereof, and FIG. 5 is a rear view of another embodiment of the inclination detecting device.
FIG. 6 is a plan view thereof, and FIG. 7 is a side view of its main part. Reference numeral in the figure 1: Rice transplanter 7: Wheel 10: Planting part 24: Float 34: Main cylinder 39: Sub-cylinder 41: Hydraulic valve 43, 50: Inclination detector 45: Pendulum

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenyuki Ouchi 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Engineering Department, Iseki Agricultural Machinery Co., Ltd. Kiyoshi Jun Koriyama, Examiner, Engineering Department, Koki Co., Ltd. (56) Reference JP 61-28312 (JP, A) Actual development 61-115014 (JP, U) Actual development 61-142512 (JP, U) Actual development Sho 50-50527 (JP, U) Actually opened Sho-58-110215 (JP, U)

Claims (1)

(57) [Claims] 1. A tilt detecting means for detecting a tilt of a machine body in a left-right direction, a rolling control hydraulic valve which is interlockingly connected with the tilt detecting means by a mechanical connecting means and is switched by an operation of the tilt detecting means, and the hydraulic pressure. A rolling control device for an agricultural work machine, comprising: a rolling control hydraulic cylinder that rolls the machine body left and right by expanding and contracting by switching valves, wherein the tilt detecting means is swung left and right depending on the tilt of the machine body in the left-right direction. A pendulum sensor, which is provided with rolling lock means configured so that the pendulum sensor is in a state in which the pendulum sensor cannot swing to the left and right at the left and right neutral position and the machine is in a rolling inoperable state. Rolling control device.