JPH0615423U - Horizontal control device for agricultural vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] In a riding rice transplanter equipped with a transplanter, the structure of the horizontal controller of the transplanter is simplified and the transplanter is easily attached and detached. [Structure] A frame 25 extending to the left and right of the transplanter 10 is supported by a hitch portion 23 on the side of the transplanter 10 so as to be freely rollable (inclinable left and right). Hitch 23 and frame 25
The actuator 26 is interposed between the hitch 23 and the expansion / contraction part 26b on the tip side of the actuator 26,
The drive unit 26a on the base end side is connected to the frame 25 side. By expanding and contracting the actuator 26, the frame 2
The horizontal control of the entire transplanter 10 is performed via 5. The actuator 26 has a heavy-weight drive unit 26a disposed below, which simplifies the structure of the attachment unit. Further, the transplanter 10 is attached to and detached from the traveling machine body 5 via the hitch unit 23, which facilitates attachment and detachment work. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a horizontal control device for an agricultural work vehicle that controls a work device such as a transplanter that is rotatably connected to a traveling machine body to a posture suitable for a field scene.

[0002]

[Prior art]

 Conventionally, a passenger rice transplanter as an agricultural work vehicle includes a traveling machine that is self-propelled by a propelling wheel and a transplanter (working device) that plants seedlings. The transplanter is supported so that it can be lifted and lowered by a lifting link arranged at the rear of the vehicle side, and is also supported so that it can be rolled. The transplanter during the planting work is held at the lower work position by the lifting link, and rolling control (right and left tilt control) is performed at this work position.

A retractable actuator is interposed between the lifting link and the transplanter. The transplanter has a horizontal member that extends in the left-right direction and is supported by the elevating link so that it can be tilted left and right.One end of the actuator is connected to this horizontal member, and the other end is connected to the elevating link. Has been done. Therefore, for example, the tilt angle of the horizontal member with respect to the elevating link is adjusted by expanding and contracting the actuator based on the output of the farm scene detection sensor that detects the tilt of the horizontal member with respect to the farm scene. As a result, the posture of the transplanter with respect to the farm scene is controlled, and the planting depth for the farm scene, such as seedlings, is maintained at a suitable and constant depth.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned actuator and horizontal control device including the horizontal member, the structure is complicated, and the work of attaching / removing the transplanter to / from the traveling machine body, that is, the work of attaching / detaching the transplanter tends to be complicated. There was a problem. That is, the actuator having the drive section and the expansion / contraction section is inserted with the drive section connected to the traveling machine body and the expansion / contraction section connected to the transplanter side.For example, when the transplanter is removed, It was necessary to remove the drive part of the actuator and then remove the horizontal part of the transplanter from the lifting link.

In view of this, the present invention connects the actuator drive unit to the work device (transplanter) side, and connects the expansion / contraction unit of the actuator to the hitch unit so that the actuator is interposed between the hitch unit and the work device. Then, by mounting the work device to the traveling machine body through the hitch portion, the structure of the horizontal control device is simplified, and the horizontal control device of the agricultural work vehicle is designed so that the work device can be easily attached to and detached from the traveling machine body. It is intended to provide

[0006]

[Means for Solving the Problems]

 The present invention has been made in view of the above circumstances, in which the working device (10) is connected to the traveling machine body (5) via the hitch portion (23) in a rollable manner, and the actuator (26). In the horizontal control device of the agricultural work vehicle (1), which adjusts the rolling angle of the working device (10) with respect to the traveling machine body (5) to control the attitude of the working device (10) with respect to the field scene, the hitch part is provided. (23) is disposed on the side of the working device (10), is detachably attached to the traveling machine body (5), and supports the working device (10) in a rolling manner, and the actuator ( 26) is a telescopic electric actuator having a telescopic part (26b) connected to the hitch part (23) side and a drive part (26a) connected to the working device (10) side. A motor, characterized in that.

[0007]

[Action]

 Based on the above structure, when the actuator (26) interposed between the hitch part (23) and the working device (10) is expanded and contracted, the working device (19) is appropriately rolled () with respect to the hitch part (23). It can be tilted left and right). Therefore, if the hitch part (23) is attached to the traveling machine body (5) side, the working device (10) can be rolled with respect to the traveling machine body (5). In other words, when the working device (10) is mounted on the traveling body (5) in a rollable manner, the work of mounting the actuator (26) is not necessary, only the mounting of the hitch part (23). The same applies when removing the working device (10), and the hitch portion (23) may be removed from the traveling machine body (5).

[0008]

[Effect of device]

 As described above, according to the present invention, all the horizontal control devices including the electric actuator (26) are arranged on the working device side, and moreover, the driving part (26a) of the actuator (26) is mounted on the working device (10). Also, by connecting the expansion / contraction part to the hitch part (23), the structure of the horizontal control device can be simplified and the work device (10) can be easily attached to and detached from the traveling machine body (5).

The reference numerals in the parentheses are for the purpose of comparing the drawings, and do not limit the configuration of the present invention in any way.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in the side view of FIG. 1 and the plan view of FIG. 2, a passenger rice transplanter 1 as an agricultural work vehicle has a traveling machine body 5 supported by a pair of left and right front wheels 2, 2 and rear wheels 3, 3. Is equipped with. The traveling vehicle body 5 has an engine (not shown) mounted in front of the front wheels 2 and 2, and a driver's seat 9 having a seat 7 between the front wheels 2 and 2 and the rear wheels 3 and 3. Further, behind the traveling machine body 5, an elevating link 11 which supports an implanting machine 10 described later so as to be able to elevate is connected.

The elevating link 11 includes an upper link 13, a lower link 15, 15 whose base ends are swingably supported on the traveling machine body 5 side, and a vertical link which is rotatably supported by the tip ends of these links. 16 is provided. The upper link 13 is connected to a tip end portion of a lift cylinder (not shown) having a base end portion on the traveling machine body 5 side. The upper link 13 and the lower link 15 swing upward in response to the extension operation of the lifting cylinder, and swing downward in response to the shortening operation. Further, the vertical link 16 at the rear end moves up and down in response to the upward and downward swings of these links.

As shown in FIG. 2, the transplanter 10 as a working device includes a center float 21 C, a left float 21 L arranged on the left and right of the center float 21 C, a float 21 including a right float 21 R, and a planter arranged behind each float 21. A case 22a and planter arms 22b, 22b arranged on the left and right of each planter case 22a are provided, and as shown in FIGS. 3 and 4, are connected to a vertical link 16 on the traveling machine body 5 side via a hitch portion 23. There is. The hitch portion 23 is detachably attached to the vertical link 16, a bracket 23b supported by the hitch body 23a so as to be swingable in the front-rear direction, and a central portion fixed to the lower portion of the bracket 23b in the front-rear direction. And a bearing 23c directed toward. The bearing 23c rotatably supports a rolling shaft 25a protruding forward from a frame 25 (horizontal member) in the left-right direction which constitutes a part of the transplanter 10, and thereby extends in the left-right direction. 25 is supported so that it can be rolled freely (left and right can be tilted). An extendable electric actuator 26 is interposed between the frame 25 and the bracket 23d fixed to the upper portion of the hitch portion 23. The actuator 26 is arranged substantially vertically, and a driving portion on the proximal end side having a motor 26a is swingably connected to the frame 25 via a pin 26c in the left-right direction, while an elastic portion 26b on the distal end side is formed. Is connected to the bracket 23d via a pin 26d so as to be swingable left and right. As described above, the actuator 26 prevents the center of gravity of the entire transplanter 10 from becoming high by arranging the heavy drive section below and the light expandable section 26b above. Compression springs 26e and 26e as cushioning materials are attached to the connecting portion between the expandable portion 26b and the bracket 23d.

The transplant part 10 includes a shaft case 27 arranged in parallel with a frame 25 extending in the left-right direction. Each of the planter cases 22a described above is fixed to the shaft case 27, and includes a planter arm 22b that performs a planting operation while being guided by the planter case 22a. A center float 21C, a left float 21L, and a right float 21R are mounted on the shaft case 27 so as to be vertically swingable. A flat leveling portion 21a is formed on the bottom surface of each float 21, and the leveling portion 21a is used to level the topsoil on the cultivator in the field scene. Further, brackets 27L and 27R are fixed to the left and right ends of the shaft case 27, respectively. These brackets 27L and 27R are provided with stands 29L and 29R that take a substantially upright standing position (solid line in FIGS. 1 and 3) and a lower operating position (dotted line in FIG. 3). Left and right farm scene detection sensors 31L and 31R having the same structure are attached via mounting members 30L and 30R (however, only 30R is shown in FIG. 4). Therefore, it is easy to remove the field scene detection sensors 31L and 31R.

As shown in FIGS. 3 and 4, the field scene detection sensor 31R (same for 31L) includes a sensor arm 32 having a contact portion 32a that contacts the field surface. The sensor arm 32 is swingably supported at a base end side provided with a potentiometer 33, and is supported so that a tip end side provided with an abutting portion 32a hangs obliquely rearward. The potentiometer 33 has a potentiometer shaft and detects the rotation angle of the potentiometer shaft rotated by the swing of the sensor arm 32. Further, the contact portion 32a is disposed behind the leveling portions 21a, 21a of the left and right floats 21L, 21R, that is, with respect to the position of the contact portions 32a, 32a in the left-right direction, the left and right sides of the leveling portions 21a, 21a. The field scene in which the contact portions 32a and 32a are in contact with each other is arranged so as to fit within the width, and is leveled by the leveling parts 21a and 21a of the left and right floats 21L and 21R during planting work of seedlings. It is the part that That is, when the field scene in which the floats 21L, 21R, and 21C are flattened (leveled) along with the traveling of the traveling vehicle body 5 in the field field is the field leveling range, the contact portions 32a of the left and right sensor arms 32 are set. , 32a are arranged so as to move within the field leveling range. Therefore, the detection system of the field detection sensors 31L and 31R that detect the height from the field scene to the left and right ends of the transplanter 10 is significantly improved, and the horizontal control of the transplanter 10 is performed well, so that each planter can be controlled. The arm 22b is held in a good position with respect to the field scene. As a result, the planting depth of seedlings in the field is kept constant and floating seedlings and deep planting are prevented.

Here, the term “height from the field scene” means the surface of the topsoil covering the upper surface of the tiller in the field. In the riding rice transplanter 1 during the planting work of the seedlings, even when the front wheels 2, 2 and the rear wheels 3, 3 of the traveling machine body 5 follow the unevenness of the tiller and the traveling machine body 5 is inclined. Horizontal control is performed by the left and right farm scene detection sensors 31L and 31R so that the transplanting posture of the transplanter 10 with respect to the topsoil becomes constant. In other words, the planting depth of seedlings is set to be almost constant from the surface soil surface.

Furthermore, the planting of the seedlings by the planter arms 22b and 22b arranged at the left and right ends is performed by projecting portions 21b and 21b projecting rearward from the laterally widening even portions 21a and 21a of the left and right floats 21L and 21R. This is performed between the left and right field scene detection sensors 31L and 31R and the sensor arms 32. At the time of planting seedlings, the projecting portion 21b and the sensor arm 32 are planted in a state of being slightly embedded in the topsoil of the field scene. After the protruding portion 21b and the sensor arm 32 pass through, the soft topsoil tends to flow to the recessed portion. Therefore, if the sensor arm 32 is not provided, the seedling immediately after planting tends to fall to the protruding side. Therefore, by arranging the sensor arm 32 at the above-mentioned position and arranging the projecting portion 21b and the sensor arm 32 on the left and right sides of the seedling respectively, the condition of the flowability of the topsoil on the left and right sides can be determined. In the same way, prevent the seedling from falling down to the protruding part 21b side.

As shown in FIGS. 3 and 4, in the transplanting section 10, planting arms 39, 39 are erected at both left and right ends of the above-described rolling-capable frame 25, whereby a seedling stand 40 is provided. Is held. A vertical feeding mechanism 50 for seedlings is arranged at a position substantially symmetrical to the actuator 26 with the hitch 23 interposed therebetween.

As described above, the hitch 23 on the transplanter 10 side supports the frame 25 of the transplanter 10 so that the frame 25 can be tilted left and right, and the actuator 26 interposed between the transplanter 10 and the frame 25. When the transplanter 10 is attached to the traveling machine body 5, the horizontal control of the entire transplanter 10 is performed by expanding and contracting, that is, all the members for horizontally controlling the transplanter 10 are arranged on the transplanter 10 side. By attaching the hitch 23 on the side of the transplanter 10 to the elevating link 11 on the rear of the traveling body 5, the structure for horizontal control can be simplified and the transplanter 5 can be easily attached and detached. it can.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view of the transplanter.

[Explanation of symbols]

 1 Agricultural work vehicle (passenger rice transplanter) 5 Traveling machine 10 Working device (transplanter) 23 Hitch part 26 Actuator (electric actuator) 26a Drive part (motor) 26b Expansion part

Claims (1)

[Scope of utility model registration request] 1. A work device is rotatably connected to a traveling machine body through a hitch portion, and an actuator adjusts a rolling angle of the working machine with respect to the traveling machine body to adjust a posture of the working machine with respect to a field scene. In a horizontal control device for an agricultural work vehicle to be controlled, the hitch portion is disposed on the work device side, is detachably attached to the traveling machine body, and supports the work device in a rolling manner, and the actuator. Is a telescopic electric actuator having an expansion / contraction part connected to the hitch side and a drive part connected to the work device side, the horizontal control device for an agricultural work vehicle.