JPH0576214U - Elevating / lowering sensor adjusting device in the walking type mobile agricultural machine for paddy field - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a device capable of easily obtaining the maximum distance between the ground contact sensor and the machine body in the machine body height automatic control device of the walking type mobile agricultural machine for paddy fields. [Structure] A wheel 4 is pivotally supported by a swing member that is swingably supported on a machine body 1, and a switching valve of a hydraulic actuator connected to the swing member is interlocked with a ground sensor of a machine body height detection mechanism. In the paddy working machine in which the height of the body 1 is automatically controlled, the grounding sensor is hung on a support member integrated with the body 1 by a hanging member such as a wire or a rod so that the length can be adjusted. Lifting / lowering sensor adjustment device in a walking type mobile agricultural machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a wheel is pivotally supported by a swinging member that is swingably supported by a machine body, and a switching valve of a hydraulic actuator connected to the swinging member is interlocked with a ground sensor of a machine body height detection mechanism. The present invention relates to a walk-behind mobile agricultural machine for paddy fields that automatically controls the height of the machine body.

[0002]

[Prior Art]

 Conventionally, a wheel is pivotally supported on a swing member that is swingably supported on the machine body, and a switching valve of a hydraulic actuator connected to the swing member is connected to a ground sensor of a machine body height detection mechanism. For paddy fields, the height of the fuselage is automatically controlled, and a bracket that is erected on the upper surface of the float, which serves as a ground contact sensor, is swingably connected to the fuselage with a wide and bent bend. Pedestrian mobile agricultural machines are already known.

[0003]

[Problems to be solved by the device]

 In the known paddy field type walking agricultural machine, the mud soil pushed up by the ground contact sensor accumulates on the ground contact sensor during work, and the mud adheres to or accumulates on the V-shaped links and brackets, which deteriorates the detection performance. . Also, when steering on the road, the V-shaped link stretches and the ground contact sensor lowers, which may cause the front part to collide with an obstacle and be damaged.

[0004]

[Means for Solving the Problems]

 According to the present invention, a wheel is pivotally supported by a swinging member that is swingably supported by a machine body, and a switching valve of a hydraulic actuator connected to the swinging member is interlocked with a ground sensor of a machine body height detection mechanism. In a paddy work machine that automatically controls the height of the machine body, grounding sensing is performed by suspending the grounding sensor on a support member integrated with the machine body with a length-adjustable suspension member such as a wire or rod. The above-mentioned problems were solved by adjusting and setting the clearance between the body and the machine body to the required minimum in consideration of the automatic control range by hydraulic pressure and the component tolerance.

[0005]

[Action]

 When at least the ground sensor is suspended from the machine body, there are variations in the distance between the ground sensor and the machine due to manufacturing errors and assembly errors in the parts.In such a case, the length of the suspension member should be adjusted. Adjust to set the distance between the ground sensor and the aircraft to the minimum required for the automatic aircraft height control range. When paddy field work is performed in this state, it is possible to detect the height of the airframe accurately, as mud and other foreign matter rarely run up and accumulate on the ground sensor. Also, when steering on the road, the ground contact sensor does not droop as much as in the conventional link system.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to a walk-behind double-row planting machine shown in the drawings. A transmission 2 is connected to the front of a box-shaped machine body 1 that also serves as a transmission case, and an engine 3 is mounted on top of it. To do. A swing chain case 5 having wheels 4 supported at the rear is vertically mounted on a wheel drive shaft projecting from the transmission 2 on both sides, and the upper part of the engine 3 is located behind a portion corresponding to the axle. The bonnet 6 covers the upper part, and the rear part of the body 1 is equipped with a pair of left and right planting parts 7, a planting device 10 including a seedling stand 8 that reciprocates left and right, and a rear part on the lower part. A float 11 is suspended as a detector that moves up and down as a center, and a handle 12 is extended to the rear part of the planting device 10.

A lever plate 13 attached to the handle 12 is mounted with a planting clutch operating lever 14 and a traveling clutch operating lever 15 so as to be rotatable up and down, and a cylinder movable movable hydraulic cylinder 16 of the mission case 2 is mounted. Both ends of the balance arm 17 which is mounted and pivotally supported on the cylinder of the lifting hydraulic cylinder 16 are connected to the left and right swing chain cases 5 and 5 by rods, respectively. The wheels 4 and 4 of the robot are moved up and down with respect to the machine body 1, and the rolling hydraulic cylinder 9a connected to one side of the balance arm 17 is expanded and contracted via a control valve 19 which operates according to the detection result of the weight type tilt sensor 9. The airframe 1 is automatically operated so that the airframe 1 is maintained in a substantially horizontal posture, and the ascending / descending portion is moved to the side of the lifting cylinder 16. A rotary valve 18 for control is provided.

The planted clutch operating lever 14 is interlockingly connected to the clutch arm of the planted clutch via a rod 20, a swing arm 22 supported by a fulcrum pin 21, an operating wire (not shown), a compression spring, and the like. The branch arm 22a integral with the swing arm 22 is linked to a long hole 23a in the rear portion of the connecting plate 23 by bolts 26 so that the connecting position can be adjusted, and the front end of the long hole 23b in the front portion is the rotary valve 18 described above. A rear end bent portion of a rod 25 which is interlockingly connected to the valve arm 18a is penetrated, and the valve arm 18a is urged downward by a spring 27 in a pulling direction.

The traveling clutch operating lever 15 is interlockingly connected to a pin 31 of a fan-shaped plate 33 that is rotatably supported by a horizontal shaft 32 via a rod 28, a compression spring, and a plate 30. Since the plate 33 is interlocked with the main clutch arm 36 of the traveling clutch (main clutch) via the rod 35, when the traveling clutch operating lever 15 is operated to the on position or the off position, the fan-shaped plate 33 rotates. However, the running clutch is disengaged accordingly.

Further, the base portion of the sensing lever 37, the sensing plate 39, and the intermediate plate 40 are rotatably fitted to the horizontal shaft 32, and the tip portion of the sensing rod 37 is in front of the float 11. It is loosely fitted to the gate-shaped bracket 38 fixed on the bottom plate near the part, and the middle part is connected to the lower bent part 39a of the sensing plate 39 via the tension spring 41 and at the front end of the lower bent part 39a. The adjusting bolt 42, which is received and screwed into the upper bent portion 39b of the sensing plate 39, is brought into contact with the front edge of the intermediate plate 40 so as to be separable from the front edge of the intermediate plate 40. The bent portion at the rear end is fitted and interlocked and connected, and the pin 31 of the fan-shaped plate 33 is loosely fitted in the arc-shaped long hole 39c of the sensing plate 39.

The bumper bracket 43 to which the bumper 43a is attached is screwed to both sides of the front part of the mission case 2 and has a downward U-shape, and a lower end of a bracket 45 integrated with the bottom plate 44 of the float 11 is provided. The adjustment wire 46 screwed on has a bolt 47 at the upper end, and this bolt 47 is inserted into a hole formed in the middle of the bumper bracket 43 and is connected by a nut 47 so that the vertical movement can be adjusted. Reference numeral 6 designates the float 11 and the bumper bracket 43 depending on manufacturing errors of the float, the bracket 45, the sensing rod 37, the sensing plate 39, the intermediate plate 40, the rod 25, the rotary valve 18, etc., or their assembly errors. The distance, that is, the distance between the body 1 and the float 11 is set as narrow as possible within the range where automatic control described later is possible. To determine.

In the rice transplanter described above, when performing a planting operation, if the traveling clutch operating lever 15 and the planting clutch operating lever 14 are set to the on position, and the traveling clutch and the planting clutch are turned on, respectively. The planting bodies 7 and 7 scrape the seedlings on the seedling mounting table 8 one by one and plant them in the scraped field, the wheels 4 and 4 on the left and right roll on the cultivator, and the float 11 on the field surface. Sensing earth pressure while gliding. At this time, the rear end of the rod 25 and the intermediate plate 40 freely operate within the range of the elongated hole 23b with respect to the connecting plate 23, and the sensing lever 37 and the sensing plate 39 are integrated by the contact and tension springs 41. In this state, since the front part of the float 11 is rotated by raising and lowering the front part, the valve arm 18a is rotated through the rod 25, whereby the rotary valve 18 is switched between upward, neutral, and downward and the height of the machine body 1 is changed. Is automatically controlled to be constant.

Next, when the rice transplanter reaches the headland and turns, the planting clutch operating lever 14 is rotated to the fixed position through the cut position while the traveling clutch operating lever 15 is set to the on position. Then, the planted clutch is disengaged, and the swing arm 22 and the branch arm 22a further rotate counterclockwise in the figure while compressing the compression spring interposed in the wire communicating with the planted clutch arm, so that the front long hole The front end of 23b comes into contact with the bent portion of the rear portion of the rod 25, and in this state, the intermediate plate 40 is in a raising semi-automatic state in which it is allowed to rotate only in the raising direction (clockwise direction). Next, when the driver lifts the steering wheel 12, the distance between the front part of the float 11 and the body 1 becomes narrower, and the float 11 pushes up the sensing lever 37 to rotate it, whereby the sensing plate 39 rotates clockwise. However, since the intermediate plate 40 is rotated in the same direction (rearward) via the adjustment bolt 42, the valve arm 18a is rotated in the raising direction (counterclockwise direction) via the rod 25, and the rotary valve 18 is raised. Then, the aircraft 1 rises. In this way, when the height of the machine becomes suitable for the turning operation, the handle 12 is pushed down to make the machine horizontal, and the bent portion of the rear end of the rod 25 is restricted to the front end of the elongated hole 23b, and the lower side is lowered. The rotary valve 18 is held in the neutral position. At this time, the sensing lever 37 rotates in the half-clock direction, but the adjust bolt 42 only separates from the front edge of the intermediate plate 40.

When supplying seedlings to the seedling placing table 8, when the planting clutch operating lever 14 is set to the on position or the disengaged position and the traveling clutch operating lever 15 is set to the disengaged position, the fan-shaped plate 33 moves counterclockwise. Then, the traveling clutch is disengaged and the pin 31 comes into contact with the rear end of the arc-shaped elongated hole 39c that allows the sensing plate 39 to rotate independently, and the sensing plate 39 rotates in the upward direction. Therefore, at this position, even if the float 11 tries to rotate the sensing lever 37 in the upward direction, the sensing plate 39 does not rotate, and a semi-automatic state in which the rotation is allowed only in the lowering direction is achieved. Even if the handle is lifted in this state, the machine body 1 does not rise and the lowered state is maintained.

In order to transport or store the rice transplanter, when stopping the height control and fixing the machine body 1, the traveling clutch operation 15 is operated to the lower position and the planting clutch operation lever 14 is fixed. Operate to the position. In this state, both the traveling clutch and the planting clutch are disengaged, and the front end of the elongated hole 23b of the connecting plate 23 receives the bent portion at the rear end of the rod 25 to regulate the lowering operation, and the pin 31 senses. Since the lowering operation is restricted by contacting the rear end of the long hole 44 of the plate 39, the rotary valve 18 is fixed in the neutral position, and the body 1 is kept at a predetermined height regardless of the movement of the float 11. To be done.

Further, when the planting clutch operating lever 14 is operated to the raised position regardless of the position of the traveling clutch operating lever 15, the intermediate plate 40 is separated from the adjusting bolt 42 and pivots rearward, and the machine body is elevated.

In the assembly process, by adjusting the lowering position of the float 11 and adjusting the length of the wire 46, even if there are errors in various parts, they can be easily absorbed and properly adjusted. The distance between the float 11 and the fuselage can be set to a necessary minimum, and an accurate sensing operation can be performed without depositing mud or the like on the float 11.

[0018]

[Effect of the device]

 According to the present invention, as described above, the wheel 4 is pivotally supported by the rocking member that is rockably supported by the machine body 1, and the switching valve of the hydraulic actuator connected to the rocking member is connected to the ground of the machine body height detection mechanism. In a paddy work machine in which the height of the machine body 1 is automatically controlled by interlocking with the sensor body, the length of the ground sensor body can be adjusted with a suspension member such as a wire or rod on a support member integrated with the machine body. Since it is hung, even if there are errors in various parts, it is possible to easily adjust the distance between the ground sensor and the machine body to an appropriate state by adjusting the effective hanging length of the hanging member. During the planting work, the space between the airframe and the ground contact sensor becomes too wide, and mud does not deposit on the ground contact sensor and accumulate, so that the sensing performance of the ground contact sensor can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a walk-behind mobile agricultural machine for paddy fields.

FIG. 2 is a side view of the same front part.

FIG. 3 is a hydraulic system diagram of a control device.

FIG. 4 is a plan view with a part of the float omitted.

FIG. 5 is a side view of a main part with a part broken away.

FIG. 6 is a side view of the automatic lifting device.

[Explanation of symbols]

 1 Aircraft 4 Wheels 5 Swing chain case (swinging member) 10 Planting device 11 Float (ground contact sensor) 12 Handle 14 Clutch operating lever with planting 15 Traveling clutch operating lever 16 Hydraulic cylinder (hydraulic actuator) for lifting 18 Rotary valve ( Switching valve) 18a Valve arm 32 Horizontal axis 33 Fan plate 36 Main clutch arm 37 Sensing lever 39 Sensing plate 40 Intermediate plate 43 Bumper bracket 46 Wire (hanging member) 47 Bolt

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[Procedure amendment]

[Submission date] December 31, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device] Adjusting device for lifting sensor in walking type mobile agricultural machine for paddy field

Claims (1)

[Scope of utility model registration request] 1. A switching valve of a hydraulic actuator, in which a wheel 4 is pivotally supported by a swinging member swingably supported by the machine body 1 and connected to the swinging member, is used as a ground sensor of a machine body height detecting mechanism. In a paddy working machine in which the height of the machine body 1 is automatically controlled by interlocking connection, the grounding sensor is hung on a supporting member integrated with the machine body 1 by a hanging member such as a wire or a rod so that the length can be adjusted. An apparatus for adjusting an elevation sensor in a walk-behind mobile agricultural machine for paddy fields.