JP2556049Y2 - Oil pressure sensing mechanism of paddy working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hydraulic pressure sensing mechanism for hydraulically controlling a body posture of a paddy working machine.

[Prior Art] Generally, in a paddy field machine such as a rice transplanter, a seeder, a fertilizer, and the like, in which a swing frame and a float are provided on a body frame on which an engine is mounted, a hydraulic control mechanism linked to sensing of a gravity sensor has a swing. 2. Description of the Related Art There is known an apparatus in which wheels are moved up and down to horizontally control the attitude of the aircraft.

[Problems to be Solved by the Invention] In this type of paddy field working machine, the running of the gravity sensor suspended by its own weight is improper because the body supported by the swing wheels vibrates or twists while traveling. It may not be possible to sense the aircraft's rolling accurately because it is stable, and if the gravity sensor is too far ahead, it will be affected by the aircraft's torsion, etc. Also, it cannot accurately transmit the change in height of the swing wheel itself. For this reason, there is a problem that a response delay or the like occurs in the hydraulic control mechanism connected to the gravity sensor, and it is not possible to obtain appropriate work accuracy.

In order to solve the above-mentioned disadvantages, the present invention can stably and accurately detect the rolling of the aircraft in a stable state even if the aircraft is shaken or twisted. The hydraulic sensing mechanism of the paddy working machine that can transmit the change in the pressure and immediately controls the aircraft's attitude hydraulically in conjunction with this, and in conjunction with the operation of detecting the fluctuation of the float, it is possible to obtain appropriate working accuracy The purpose is to provide

[Means for Solving the Problems] To solve the above problems, a technical measure taken by the present invention is to hang a gravity sensor that senses rolling of the aircraft at a center position of the aircraft frame having swing wheels on both sides. A paddy working machine configured to control the vertical movement of the swing wheel by a swing change of the gravity sensor and a float disposed immediately below the gravity sensor, and the paddle working machine is located at a position near the axis of the swing wheel in a side view. A hydraulic valve is arranged, and an operating rod protruding from the hydraulic valve is directly connected to the gravity sensor, and the swing center of the float is connected to the gravity sensor via an intermediate link positioned directly above and linked to the gravity sensor. It is characterized in that the operating rod is made to continuously respond by the swing change of the gravity sensor.

[Operation of the invention] Therefore, according to the invention, when performing paddy work,
When the swing wheel provided on the body frame travels on the plow, the float slides on the rice field along with the swing wheel, and the swing change causes the hydraulic valve to be controlled via the intermediate link to move the swing wheel up and down. In addition, when the gravity sensor detects the rolling of the body during the traveling operation, the swing wheel is moved up and down in conjunction with the gravity sensor to hydraulically control the posture of the body. At this time, even if the body supported by the swing wheel is shaken or twisted, the gravity sensor provided at the position near the axis of the swing wheel in the side view accurately senses the rolling of the body accurately in a constantly stable state. , Can be quickly transmitted to a hydraulic valve that is juxtaposed with the gravity sensor. The gravity sensor that senses rolling near the axis of the swing wheel accurately and continuously transmits changes in the vertical movement of the swing wheel itself. Appropriate work accuracy can be obtained by cooperation with the operation.

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a walking type rice transplanter exemplified as a paddy field working machine. A float 4 is provided at a lower portion of a body frame 3 on which an engine 2 is mounted, and swing wheels 6 supported by a chain case 5 are provided on both sides thereof. Have been. The float 4 has a float adjuster 7 fixed at its front left and right centers, and rolls around a rotation shaft 8 of the float adjuster 7 at the center of swing. The rear end of the float 4 has a bracket 9 fixed at its left and right center. Rolling is possible around the pivot 10 around the pivot. A horizontal pin 11 fixed to the pivot 10 is supported by an adjustment hanger 12, and a lever
With the operation 13, the planting depth can be adjusted by moving the rear part of the float 4 up and down.

Reference numeral 14 denotes an up-down swingable adjuster supported at the front of the body, and a rotating portion 15 provided at the swinging end thereof is fixed to the rotating shaft 8, and the float 4 is rotated by the swing of the adjuster 14. Moves up and down. A main sensing rod 16 projects upward from the rotating portion 15.

The float adjuster 7 has a protruding portion extending above the rotating shaft 8 and a restraining portion 17 comprising left and right restraining bodies 17a, 17a.
Is formed, and an intermediate link 19 that is pivotally supported on the fuselage side via a longitudinal support shaft 18 located immediately above the rotation shaft 8.
Has a predetermined dead zone range N facing the restraining bodies 17a, 17a. The upper end 19a of the intermediate link 19 extending upward from the rear end of the support shaft 18 is interlocked to a gravity sensor 20 that detects rolling of the body via a long hole 20a.

Further, the swing wheel 6 has a pivot arm 22 projecting from a swing shaft 21 of the chain case 5 and a hydraulic control mechanism via a connecting rod 23.
Although connected to the hydraulic control mechanism 24, the hydraulic control mechanism 24 is configured as follows.

That is, reference numeral 25 denotes a main cylinder which is provided upright in front of the engine 2, and a left-right lifter balance 26 is swingably mounted on a top end of the main cylinder 25 via a fulcrum shaft 27. . The connecting rod 23 is connected to both ends of the lifter balance 26, and a sub cylinder 28 is connected to one side of the lifter balance 26.

Numeral 29 denotes a hydraulic valve located in the vicinity of the axis 6a of the swing wheel 6 in a side view. An operating rod 31 for switching the hydraulic valve 29 is protrudingly provided on the upper end side thereof.

The upper end of the main sensing rod 16 is linked to a hydraulic halve 29 via a link mechanism 32. When the main sensing rod 16 detects the vertical movement of the float 4, the hydraulic valve
By switching 29, the main cylinder 25 operates and slides along the cylinder rod 33, and the lifter balance 26 moves in parallel to move the left and right swing wheels 6 simultaneously up and down, while the gravity sensor 20 When the rolling is detected, the gravity sensor 20 swinging with respect to the airframe switches the hydraulic valve 29 to operate the sub-cylinder 28 to move the left and right swing wheels 6 up and down in opposite directions, thereby forming a hydraulic pressure sensing mechanism for hydraulically controlling the attitude of the airframe. Have been. Further, when the float 4 is inclined with respect to the airframe, the swing of the gravity sensor 20 is suppressed by the rotated intermediate link 19. 34 is a cylinder seat, and 35 is a hydraulic pump.

4, the gravity sensor 20 is juxtaposed close to the position near the axis 6a of the swing wheel 6, that is, the position where the hydraulic valve 29 is disposed, in a side view.

Reference numeral 36 denotes an operation handle extending upward and rearward from the body frame 3, reference numeral 37 denotes a front-to-back and back-to-top seedling mounting table, reference numeral 38 denotes a seedling mounting rod, and reference numeral 39 denotes a bumper provided on the front of the body.

In the above-described configuration, when performing the planting operation, the swing wheel 6 runs on the plow, and the float 4 slides along the rice field while the seedlings 38 are used to scrape the seedlings on the seedling mounting table 37. Take it and plant it on the rice field. During the operation, when the float 4 moves up and down, the hydraulic valve 29 operates the main cylinder 25 in conjunction with the main sensing rod 16 that senses the movement, and the swing wheel 6 moves up and down simultaneously to control the height of the body.

Then, when the aircraft rolls, the gravity sensor 20 swaying with respect to the aircraft switches the hydraulic valve 29 to switch the sub cylinder 28
, The left and right swing wheels 6 move up and down in opposite directions to horizontally control the body attitude.

When the float 4 is inclined with respect to the body, the rotating intermediate link 19 restrains the gravity sensor 20. If the intermediate link 19 is in the dead zone range N of the restraining unit 17,
The hydraulic valve 29 does not operate (FIG. 7 (a)).

Next, when the aircraft and the float 4 are tilted in the same direction, the restraint unit 17 restrains the intermediate link 19 and controls the attitude of the aircraft to an intermediate tilt angle between the absolute horizontal control and the horizontal level of the rice field.

That is, since the dead zone range N is provided between the restraint unit 17 and the intermediate link 19, the aircraft is controlled to be offset from the horizontal of the rice field surface by an angle corresponding to the dead zone range N in an absolutely horizontal manner (FIG. 7 ( B)). When the float 4 is further tilted from this state, the restraint by the restraint unit 17 is completely released, and the absolute horizontal control by only the gravity sensor 20 is performed. When the aircraft is tilted and the float 4 is greatly inclined with respect to the aircraft, the gravity sensor 20 swings by the intermediate link 19 restrained by the restraint unit 17 to control the attitude of the aircraft (FIG. 7 (c)). Is controlled with reference to the rice field surface (FIG. 7 (d)). When the float 4 is at the lowest position, such as when traveling on a road, the link between the restraint unit 17 and the intermediate link 19 is disconnected, and the aircraft attitude is horizontally controlled only by the gravity sensor 20 (FIG. 7). (E)).

In the above-described hydraulic control process, a gravity sensor 20 for sensing the rolling of the airframe is provided near the axis 6a of the swing wheel 6 in side view even if the airframe shakes or twists during the airframe running. Therefore, the gravity sensor 20, which is located at the center of the body frame 3 in the left and right direction, that is, at the fulcrum of the body balance, is not affected by the swing or twist of the body, and is accurately and stably Rolling can be sensed.

In addition, the gravity sensor 20 detects the swing wheel 6 near the axis 6a.
Directly senses the rolling of the body due to the inclination of the body, and directly and continuously transmits the swinging change of the body to the operating rod 31 of the hydraulic valve 29 adjacent thereto, so that the height change of the swing wheel 6 is transmitted as it is. In conjunction with this, the hydraulic control mechanism 24 can immediately move the swing wheels 6 up and down to hydraulically control the attitude of the aircraft, and there is no response delay or the like in the hydraulic control mechanism 24, and the swing of the float 4 does not occur. A proper planting accuracy can always be obtained in cooperation with the motion change sensing operation.

[Effects of the Invention] In short, the present invention provides a float in which a gravity sensor for detecting the rolling of an airframe is suspended at the center position of an airframe having swing wheels on both sides, and the gravity sensor and the float disposed immediately below the gravity sensor. A paddy working machine which controls the vertical movement of a swing wheel by a swing change of a hydraulic valve, wherein a hydraulic valve is disposed at a position near the axis of the swing wheel in a side view, and an operating rod protruding from the hydraulic valve is gravity-driven. In addition to being directly connected to the sensor, the swing center of the float is connected to the gravity sensor via an intermediate link located directly above and linked to the gravity sensor, and the operating rod is continuously operated by the swing change of the float and the gravity sensor. When controlling the aircraft attitude with hydraulic pressure, the gravity sensor installed near the axis of the swing wheel in side view will prevent the aircraft from swinging and twisting. While being able to accurately and accurately detect changes in the attitude of the aircraft without being affected, the configuration of rolling sensing that reaches the hydraulic valve via the float and gravity sensors is located at the center of the aircraft frame. The hydraulic valve can directly and continuously change the swing with an operating rod directly connected to the gravity sensor while maintaining the body balance between the swing center of the float located thereunder and the shortest transmission path. , The aircraft attitude can be quickly maintained in a horizontal state by smooth up and down control of the swing wheel without time lag, and the proper operation accuracy is always obtained in conjunction with the sensing operation of the swing change by the float. Is what you can do.

[Brief description of the drawings]

1 shows an embodiment of a hydraulic sensing mechanism of a paddy working machine according to the present invention, FIG. 1 is an overall side view of the paddy working machine, FIG. 2 is a plan view of a float, and FIG. FIG. 4 is a front perspective view of the same, FIG. 4 is a front view of the same, FIG.
The figure is an enlarged front view of the main part, Fig. 7 (a) (b) (c)
(D) is an operation explanatory view of the horizontal control. In the figure, 2 ... engine, 3 ... frame, 4 ... float, 6 ... swing wheel, 19 ... intermediate link, 20 ...
... gravity sensor, 29 ... hydraulic valve, 31 ... operating rod.

Claims (1)

(57) [Scope of request for utility model registration] A gravity sensor for detecting the rolling of an airframe is suspended at a center position of an airframe provided with swing wheels on both sides, and the gravity sensor and a float disposed immediately below the gravity sensor change in swing. A paddy field working machine configured to control the vertical movement of wheels, wherein a hydraulic valve is disposed at a position near the axis of the swing wheel in a side view, and an operating rod protruding therefrom is directly connected to a gravity sensor, and The swing center of the float is connected to the gravity sensor via an intermediate link positioned directly above and pivotally supported, and the operating rod is continuously responsive to swing changes of the float and the gravity sensor. Oil pressure sensing mechanism of paddy working machine.