JP2022096384A - Planting/sowing work machine - Google Patents

Abstract

To simplify a structure for driving a rotary ground leveling body, and reduce a load on a transmission mechanism for supplying power to another mechanism.SOLUTION: A planting/sowing work machine includes: a planting/sowing device that is provided in a rear part of a machine body so as to perform planting/sowing work for a field; a feed case 16 that is provided in the rear part of the machine body so as to relay power from an engine and transmit it to the planting/sowing device; and a rotary ground leveling body 50 that is provided in the rear part of the machine body so as to be rotatively driven around a horizontal shaft core. The power is supplied to the rotary ground leveling body 50 from the feed case 16.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sowing work machine that performs sowing work such as seedling planting work and sowing work on a field.

In a passenger-type rice transplanter (planting work machine), as disclosed in Patent Document 1, a ground leveling rotor (rotary leveling body) is used between a seedling planting device supported at the rear of the machine and the rear wheel of the machine. Some of them are configured to plant seedlings with a seedling planting device while leveling the surface of the rice field with a land preparation rotor.

In the ground leveling rotor (rotary leveling body), the power output from the engine is transmitted through the feed case and the planting drive case to drive the ground leveling rotor (rotational leveling body).

JP-A-2015-65525

However, when the ground leveling rotor (rotary leveling body) is driven in such a configuration, the load applied to the supplied power becomes large. Further, since the drive is transmitted from the feed case to the ground leveling rotor (rotary leveling body) via the planting drive case, the drive transmission mechanism to the ground leveling rotor (rotary leveling body) becomes complicated.

It is an object of the present invention to simplify the structure for driving the rotary leveling body and to reduce the load applied to the transmission mechanism that supplies power to other mechanisms.

In order to achieve the above object, the planting work machine according to the embodiment of the present invention is provided from a seeding device provided at the rear part of the machine body to perform seeding work on a field, and a seeding device provided at the rear part of the machine body from an engine. A feed case that relays power and transmits it to the planting apparatus, and a rotary ground leveling body provided at the rear of the machine body and rotationally driven around an axis in the left-right direction are provided, and the rotary ground leveling body is provided from the feed case. Is powered.

The power of the rotary ground leveling body may be supplied from the feed case via the planting drive case or the like. In this case, since power is supplied to the planting drive case and the rotary leveling body by one power transmission mechanism, the load applied to the transmission mechanism that supplies power to the planting drive case may increase. According to the above configuration, power is transmitted from the feed case to the rotary leveling body via an independent transmission mechanism, so that the load on the transmission mechanism that supplies power to other mechanisms such as the planting drive case is reduced and transmission is performed. The mechanism can also be simplified.

Further, the rotary ground leveling body is a first rotary ground leveling body arranged on one side in the left-right direction across the feed case, and a second rotary ground leveling body arranged on the other side in the left-right direction across the feed case. And, power may be separately supplied to each of the first rotation leveling body and the second rotation leveling body.

With such a configuration, the power transmission mechanism is further subdivided, so that the load applied to the power transmission mechanism can be reduced and the transmission mechanism can be simplified.

Further, power may be supplied from the end portions of the first rotating ground leveling body and the second rotating ground leveling body on the feed case side.

With such a configuration, the transmission mechanism can be easily simplified.

Further, each of the first rotation leveling body and the second rotation leveling body is planted in a portion on the lateral side in the left-right direction of each of the first rotation leveling body and the second rotation leveling body. An arm portion that supports the seeding device may be connected.

With such a configuration, the transmission mechanism that supplies power to the rotary leveling body and the support structure of the rotary leveling body can be separated from each other, and the transmission mechanism and the support structure can be optimally arranged.

Further, the rotary groundbreaking body is provided with a clutch that can change the posture between a descending posture in which the ground leveling work is performed and an ascending posture in which the ground leveling work is not performed, and connects and disconnects the power from the feed case to the rotary ground leveling body. The clutch may be switched from the connected state to the disconnected state in conjunction with the posture change from the lowered posture to the raised posture.

With such a configuration, when it is not necessary to drive the rotary leveling body, the power supply to the rotary leveling body is automatically cut off, so that the load applied to the transmission mechanism that supplies the power to the rotary leveling body is applied. Can be optimized.

It is a side view of a passenger-type rice transplanter. It is a schematic plan view which illustrates the drive structure of the seedling planting mechanism. It is a schematic front view which illustrates the drive structure of the leveling rotor.

Hereinafter, as an embodiment of the planting work machine according to the present invention, a passenger-type rice transplanter will be described as an example with reference to the drawings.

〔overall structure〕
First, the overall configuration of a passenger-type rice transplanter will be described with reference to FIG. In the following description, regarding the traveling aircraft (aircraft) of the rice planting machine, the direction of arrow F shown in FIG. 1 is "front of the aircraft", the direction of arrow B is "rear of the aircraft", and the direction of arrow U is "upward of the aircraft". , The direction of the arrow D is "downward of the aircraft", the direction of the front side of the paper is "left side of the aircraft", and the direction of the back side of the paper is "right side of the aircraft".

As shown in FIG. 1, the passenger-type rice transplanter according to the embodiment of the present invention is a traveling machine equipped with a pair of left and right front wheels 1 that can be steered and driven, and a pair of left and right rear wheels 2 that can be driven. To prepare for. Further, the passenger-type rice transplanter is provided with a seedling planting device 10 (corresponding to a “planting device”) connected to the rear portion of the vehicle body frame 3 of the traveling machine via a link mechanism 4.

The traveling machine body uses the power of the engine 5 mounted on the front part of the machine body to drive the front wheel drive case 7 and the rear wheel drive case via a transmission mechanism including a hydrostatic continuously variable transmission 20 and the like located inside the mission case 6. It is transmitted to 8 to drive a pair of left and right front wheels 1 and a pair of left and right rear wheels 2 to travel. The continuously variable transmission 20 is operated for shifting based on the operation of the shifting lever 18 provided in the airframe control unit 9.

The link mechanism 4 is composed of parallel quadruple links including upper and lower links 4a and 4b. The link mechanism 4 is swung up and down with respect to the vehicle body frame 3 by a hydraulic cylinder 31 that acts as a drive mechanism for raising and lowering, so that the seedling planting device 10 is moved up and down between a lowering work position and an ascending non-working position. be able to. When the seedling planting device 10 is lowered to the descending work position to run the traveling machine, the seedling planting device 10 is driven by the power supplied from the engine 5 to plant seedlings on the rice field G.

The passenger-type rice transplanter is provided with a control handle 19 for maneuvering the driver's seat 21 and the front wheel 1 in the machine control unit 9. Right and left support frames 22 are provided on the right and left portions of the front portion of the traveling machine body, and the spare seedling rest 23 is supported by the support frame 22.

The power of the engine 5 is transmitted to the front wheels 1 and the rear wheels 2 via a transmission mechanism such as a continuously variable transmission 20 and a transmission shaft 24 inside the transmission case 6. On the other hand, the power of the engine 5 is input to the feed case 16 via the transmission shaft 26 and the PTO shaft 54, and the planting drive case 17 of the seedling planting device 10 and the lateral feed mechanism of the seedling loading platform 15 (not shown). Drive the rotary ground leveling body 50 and the like.

[Seedling planting device]
Next, the seedling planting apparatus 10 will be described with reference to FIGS. 1 and 2.

In the seedling planting device 10, eight seedling planting mechanisms 13, four grounding floats 11, one grounding float 12, a seedling loading platform 15, and the like are supported by a support frame 14. That is, as shown in FIG. 2, the support frame 14 has a square pipe-shaped main frame 14a extending laterally over substantially the entire width of the seedling planting device 10 and the main frame 14a in the lateral direction of the machine body. It includes a feed case 16 attached to a central portion, and four planting drive cases 17 extending rearward from the main frame 14a. The four planting drive cases 17 are arranged side by side with a predetermined interval in the lateral direction of the machine body.

Each seedling planting mechanism 13 is arranged so as to be located on both lateral sides of the rear end portion of each planting drive case 17, and is supported on the rear end portion of the corresponding planting drive case 17 in a rotationally driveable manner. Will be done. Each seedling planting mechanism 13 is provided in a rotary rotor 13b supported in a rotary drive case 17 via a rotary support shaft 13a in a rotary driveable manner, and at both ends of the rotary rotor 13b in a rotary driveable manner. A planting arm 13c is provided.

When each seedling planting mechanism 13 is driven, the tip of the planting claw 13d provided on each planting arm 13c draws a rotation trajectory and reciprocates up and down between the lower end portion of the seedling mounting table 15 and the rice field surface G. A block for one plant from the lower end of the mat-shaped seedling placed on the seedling stand 15 alternately by the planting claw 13d of one planting arm 13c and the planting claw 13d of the other planting arm 13c. Take out the seedlings and plant them on the rice field G.

The power of the engine 5 input to the feed case 16 is transmitted from the feed case 16 to the input shaft 17a of the planting drive case 17 via the transmission shaft 33 and each strip clutch 87. The power transmitted to the input shaft 17a is transmitted to the rotary support shaft 13a via the transmission chain 34, and drives each seedling planting mechanism 13. Each seedling planting mechanism 13 is turned on and off for each row by a planting clutch (not shown) provided as a work clutch that can be turned on and off by an electric motor (not shown).

Each of the grounding floats 11 and 12 is supported so as to swing up and down separately with respect to the support frame 14 of the seedling planting device 10. The front end side of each ground float 11 and the ground float 12 is connected to the support frame 14 of the seedling planting device 10 via a link mechanism (not shown) so as to be able to move up and down. Each ground float 11 and ground float 12 are suspended and supported by a link mechanism so as not to hang down significantly from the support frame 14 when the seedling planting device 10 is raised to the raised non-working position.

[Rotary leveling body]
Next, the rotary ground leveling body 50 (ground leveling rotor) will be described with reference to FIGS. 1 to 3.

Between the traveling machine body and the seedling planting device 10, a rotary ground leveling body 50 that is rotationally driven around an axis along the width direction of the machine body is provided. The rotary ground leveling body 50 is composed of a pair of the first rotary ground leveling body 50a and the second rotary ground leveling body 50b, and the first rotary ground leveling body 50a and the second rotary ground leveling body 50b are divided into left and right sides of the central ground contact float 12. It is installed at the above position. In the figure, an example is disclosed in which the first rotary leveling body 50a is provided on the left side of the grounding float 12 and the second rotating ground leveling body 50b is provided on the right side of the grounding float 12, but the arrangement position with respect to the grounding float 12 is reversed. good.

The first rotary leveling body 50a and the second rotary leveling body 50b are individually rotationally driven around the lateral axis X of the rotary support shaft 51 by the power of the engine 5 transmitted to the PTO shaft 54.

The first rotary ground leveling body 50a and the second rotary ground leveling body 50b are supported by the seedling planting device 10 via a support arm 25 (arm portion) in a manner in which they can be raised and lowered by an elevating link (not shown). The first rotation leveling body 50a and the second rotation leveling body 50b may be configured to move up and down exceptionally, or may be configured to move up and down integrally. The first rotary leveling body 50a provided on the left lateral side of the grounding float 12 is supported by the seedling planting device 10 in such a manner that the left outer portion of the rotary support shaft 51 is supported by the support arm 25. The second rotary ground leveling body 50b provided on the right lateral side of the grounding float 12 is supported by the seedling planting device 10 in such a manner that the outer portion of the rotary support shaft 51 in the right direction is supported by the support arm 25.

The power of the engine 5 input to the PTO shaft 54 is branched from the transmission path transmitted to the input shaft 17a of the planting drive case 17 in the feed case 16, and the pair of left transmission shafts 36a and the right transmission shaft 36b Is transmitted to. The left transmission shaft 36a and the right transmission shaft 36b are provided in the left-right direction of the machine in the direction away from the feed case 16.

The left transmission shaft 36a and the right transmission shaft 36b are provided with bevel gears 37 in the opposite end (lateral outer end with respect to the feed case 16) region of the end connected to the feed case 16, respectively. Be done. When the bevel gear 37 meshes with the bevel gear 39 provided in one end region of the transmission shaft 38, the power transmitted to the left transmission shaft 36a and the right transmission shaft 36b is transmitted to the transmission shaft 38, respectively. The transmission shaft 38 is provided with respect to the bevel gear 37 downward in the vertical direction of the machine body and forward in the front-rear direction of the machine body. A bevel gear 40 is provided in the other end region of the transmission shaft 38.

When the bevel gear 40 meshes with the bevel gear 42 provided in one end region of the transmission shaft 41, the power transmitted to the transmission shaft 38 is transmitted to the transmission shaft 41. The transmission shaft 41 is provided in the left-right direction of the machine body. A sprocket 43 is provided in the other end region of the transmission shaft 38.

The chain 45 is wound over the sprocket 44 provided in the end region on the grounding float 12 side (inside in the left-right direction of the machine body) and the sprocket 43 in the rotary support shaft 51 of the rotary ground leveling body 50.

As a result, the power of the engine 5 input to the PTO shaft 54 is passed through the left transmission shaft 36a or the right transmission shaft 36b, the transmission shaft 38, the transmission shaft 41, and the chain 45, and the first rotary ground leveling body 50a and the first rotation leveling body 50a. The first rotation leveling body 50a and the second rotation leveling body 50b are rotationally driven by being transmitted to each rotation support shaft 51 of the two rotation leveling bodies 50b via individual transmission paths.

With such a configuration, the power for driving the rotary ground leveling body 50 is directly supplied from the feed case 16 without going through the planting drive case 17, so that the power transmission mechanism for supplying the power to the planting drive case 17 is provided. Such a load can be suppressed. Further, in the feed case 16, the rotary ground leveling body 50 is used in order to branch the power transmission mechanism transmitted to the PTO shaft 54 to the transmission mechanism toward the planting drive case 17 and the transmission mechanism toward the rotary ground leveling body 50. The driving structure can be simplified.

It is also possible to transmit the power for driving the rotary leveling body 50 from the vehicle body portion such as the rear wheel drive case 8 without going through the planting drive case 17. However, in this case, the number of transmission shafts that transmit power increases. Further, since the seedling planting device 10 on which the rotary ground leveling body 50 is supported moves with respect to the vehicle body portion, it is necessary to use a universal joint that is easily damaged for power transmission from the vehicle body portion. As described above, since the power for driving the rotary leveling body 50 is directly transmitted from the feed case 16, it is not necessary to add a universal joint to drive the rotary leveling body 50, and the rotary leveling body 50 is not required. The structure that drives the can be simplified.

Further, since the transmission mechanism for transmitting power to each of the first rotary leveling body 50a and the second rotary leveling body 50b is individually formed, the structure for driving the rotary ground leveling body 50 is simplified and each of them is used. The strength of the transmission mechanism is improved. Further, it becomes easy to individually control the rotational drive of the first rotary ground leveling body 50a and the second rotary ground leveling body 50b. Further, since the transmission mechanism is individually formed for each of the first rotation leveling body 50a and the second rotation leveling body 50b, the load on each transmission mechanism is reduced.

[Another Embodiment]
(1) A clutch (not shown) for switching power transmission between a connected state and a disconnected state is provided in the transmission mechanism from the feed case 16 to the rotary support shaft 51. This clutch is configured to switch from the connected state to the disconnected state in conjunction with the posture change of the rotary ground leveling body 50 from the lowered downward posture to the raised posture. As a result, the rotary ground leveling body 50 automatically rotates in the descending posture and automatically stops rotating in the ascending posture. The clutch may be individually provided for the transmission mechanism of the first rotation leveling body 50a and the transmission mechanism of the second rotation leveling body 50b.

With such a configuration, the rotational drive of the rotary leveling body 50 is automatically controlled according to the elevating and lowering of the rotary leveling body 50. Therefore, if the rotary leveling body 50 does not perform leveling, the driving of the rotary leveling body 50 is stopped. The load of the transmission mechanism that supplies power to the rotary leveling body 50 can be reduced.

(2) Not limited to the configuration in which the transmission mechanism for transmitting power to each of the first rotation leveling body 50a and the second rotation leveling body 50b is individually formed, the feed case 16, the first rotation leveling body 50a and the second rotation leveling body 50a and Power may be transmitted to both of the second rotary leveling bodies 50b via one transmission mechanism. Further, the power is not limited to the configuration in which power is transmitted from the grounding float 12 side (inner side) end region of the first rotation leveling body 50a and the second rotation leveling body 50b, and the first rotation leveling body 50a and the second rotation leveling body 50b. Power may be transmitted from the other end side (outer) end region of the above, or power may be transmitted from the middle of the rotation support shaft 51 of the first rotation leveling body 50a and the second rotation leveling body 50b.

In this way, by adopting a configuration in which power is transmitted from an arbitrary position to the first rotary ground leveling body 50a and the second rotary ground leveling body 50b, an efficient route can be obtained according to the configuration around the rotary ground leveling body 50. It can be configured to transmit power from.

(3) Further, the support of the rotary ground leveling body 50 is opposite (outside) to the side where the grounding floats 12 of the first rotary ground leveling body 50a and the second rotary ground leveling body 50b are provided by the support arm 25, in other words. The configuration is not limited to the configuration in which the outside of the place where the power is supplied is supported, and any configuration may be supported.

(4) It is also possible to have a configuration in which a clutch for switching the transmission of power to the rotary ground leveling body 50 between the connected state and the cutoff state is not provided. Further, even when a clutch is provided, the clutch is not limited to the configuration in which the clutch is automatically engaged and disengaged as the rotary leveling body 50 moves up and down, and the clutch is engaged and disengaged by a separately provided switch or the like. May be. In this way, the rotary ground leveling body 50 can be provided with an optimum configuration according to the margin of power load and the required function.

(5) The rotary ground leveling body 50 is not limited to the configuration consisting of the first rotary ground leveling body 50a and the second rotary ground leveling body 50b, and may be composed of three or more rotary leveling bodies.

(6) In the elevating link for raising and lowering the rotary ground leveling body 50, the shaft support portion of the link may be configured such that the support shaft is inserted via a bush.

With such a configuration, wear of the main body of the elevating link is reduced. Further, when the bush is worn, it can be dealt with by replacing only the bush, and the maintainability of the elevating link is improved.

(7) The sowing work machine is not limited to the seedling planting device 10, and may be a riding type rice transplanter equipped with a sowing device for supplying seeds to the rice transplanter surface G. It may be a rice transplanter, a sowing machine, or the like.

The present invention can be applied to a planting work machine such as a rice transplanter or a direct seeding machine.

5 Engine 10 Seedling planting device (planting device)
16 Feed case 25 Support arm (arm part)
50 Rotating ground leveling body 50a First rotating ground leveling body 50b Second rotating ground leveling body

Claims (5)

A sowing device installed at the rear of the machine to perform sowing work on the field,
A feed case provided at the rear of the machine body that relays power from the engine and transmits it to the seeding device.
It is provided with a rotary ground leveling body provided at the rear part of the machine body and driven to rotate around the axis in the left-right direction.
A planting work machine in which power is supplied from the feed case to the rotary leveling body. A first rotary leveling body in which the rotary ground leveling body is arranged on one side in the left-right direction across the feed case, and a second rotary leveling body arranged on the other side in the left-right direction across the feed case. Have,
The planting work machine according to claim 1, wherein power is separately supplied to each of the first rotating ground leveling body and the second rotating ground leveling body. The planting work machine according to claim 2, wherein power is supplied from the end of each of the first rotating ground leveling body and the second rotating ground leveling body on the feed case side. The first rotation leveling body and the second rotation leveling body are each planted in a portion outside the power supply point in each of the first rotation leveling body and the second rotation leveling body in the left-right direction. The planting work machine according to claim 3, wherein an arm portion that supports the plant is connected to the plant. The posture of the rotary ground leveling body can be changed between a descending posture in which the ground leveling work is performed and an ascending posture in which the ground leveling work is not performed.
A clutch for connecting and disconnecting power from the feed case to the rotary leveling body is provided.
The planting work machine according to any one of claims 1 to 4, wherein the clutch is switched from the connected state to the disconnected state in conjunction with the posture change from the descending posture to the rising posture.

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