JP2012239395A - Mowing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mowing apparatus capable of stably carrying out mowing work without being influenced by the operating state of an engine of a mobile agriculture machine while facilitating handling such as attachment/detachment.SOLUTION: The mowing apparatus 100 attachable to and detachable from a lifting link mechanism 20 provided at the front part or rear part of a traveling machine body 3 of a rice transplanter 1 which is the mobile agriculture machine, includes a connecting bracket 31 detachably mounted to the lifting link mechanism 20; a mowing engine 32 mounted to the connecting bracket 31; a hydraulic pump 33 mounted to the connecting bracket 31 and driven by the mowing engine 32; an operating fluid tank 34 mounted to the connecting bracket 31 and storing an operating fluid delivered from the hydraulic pump 33; a parallel link mechanism 40 mounted to the connecting bracket 31; and a mowing mechanism 50 mounted to the parallel link mechanism 40 and driven by the operating fluid delivered from the hydraulic pump 33.

Description

  The present invention relates to a mowing apparatus that can be mounted on a mobile agricultural machine.

  DESCRIPTION OF RELATED ART Conventionally, the mowing apparatus with which mobile farm machines, such as a riding type rice transplanter and a riding type management machine, are known. In such a mowing apparatus, in the case of a riding type rice transplanter, it is configured to be detachably attached to an elevating link mechanism provided at the rear part of the traveling machine body. Specifically, the mowing mechanism of the mowing apparatus is detachably supported by the elevating link mechanism via the connection bracket. The mowing mechanism is driven by hydraulic oil supplied from a hydraulic pump driven by power from the PTO shaft. For example, as described in Patent Document 1.

However, since the hydraulic pump is driven by the PTO shaft that drives the planting unit in the mowing device disclosed in Patent Document 1, the rotation of the PTO shaft is stopped when the traveling unit is stopped, and the mowing operation is performed at the travel start position. This causes uneven cutting at the travel stop position. Further, since the PTO shaft is linked to the vehicle speed, the number of rotations of the cutting blade is different between low speed traveling and high speed traveling, and the cutting finish is different.
In addition, a technique in which a mowing apparatus is mounted on a riding type management machine is known. For example, as described in Patent Document 2. In this case, since the hydraulic oil is supplied from the hydraulic pump provided in the vicinity of the engine of the traveling machine body of the riding type management machine or the hydraulic pump driven by the PTO shaft, the pressure of the hydraulic oil is reduced to that of the riding type rice transplanter. It is affected by the operating state of the engine. In other words, when the mowing operation is performed while traveling on a paddy field or the like, the traveling load increases, the rotation speed of the mowing device decreases, and the mowing operation may not be performed smoothly. In addition, when the hydraulic pump is disposed in the vicinity of the engine provided in the traveling machine body, the piping from the hydraulic pump to the mowing mechanism becomes complicated, and handling such as attaching and detaching the mowing apparatus becomes complicated, and the pump capacity is increased. Therefore, a mowing device that matches the pump capacity is required. Moreover, the raising / lowering mechanism and hydraulic device for raising / lowering a mowing apparatus were needed.

JP 2000-60256 A Japanese Patent No. 3735961

  The present invention has been made in view of the situation as described above, and provides a mowing apparatus that can stably perform cutting work without being affected by the operating state of an engine of a mobile agricultural machine and is easy to handle such as attachment and detachment. Objective.

  That is, in claim 1, a mowing device detachably attached to a lifting link mechanism provided at the front or rear of a traveling machine body of a mobile agricultural machine, wherein the connecting bracket is detachably attached to the lifting link mechanism; A mowing engine attached to a connection bracket, a hydraulic pump attached to the connection bracket and driven by the mowing engine, and a hydraulic oil tank attached to the connection bracket and storing hydraulic oil delivered from the hydraulic pump; , A parallel link mechanism attached to the connection bracket, and a cutting mechanism attached to the parallel link mechanism and driven by hydraulic oil fed from the hydraulic pump.

  According to a second aspect of the present invention, the cutting engine is attached to a substantially right and left center of the connection bracket, the hydraulic pump and the hydraulic oil tank are attached to the left and right sides of the connection bracket, and the parallel link mechanism is It is attached to the left and right other sides of the connecting bracket.

  According to a third aspect of the present invention, the hydraulic oil tank is attached to a position above the hydraulic pump and overlapping with the hydraulic pump.

  As effects of the present invention, the following effects can be obtained.

That is, according to the first aspect of the invention, the mowing mechanism is driven by the mowing engine provided in the mowing device. For this reason, the cutting operation can be performed stably without being affected by the operating state of the engine of the mobile agricultural machine. In addition, it is not necessary to consider the rated output of the engine of the mobile agricultural machine, the rotational speed of the PTO, the capacity of the hydraulic pump, and the like.
Moreover, since the mowing apparatus is attached to the lifting / lowering link mechanism via the connecting bracket, the hydraulic piping is simplified and can be integrally attached to and detached from the mobile farm machine. For this reason, attachment / detachment, storage, adjustment, and the like of a mowing device (a mowing engine, a hydraulic pump, a hydraulic oil tank, a mowing mechanism and piping connecting them, etc.) can be facilitated.

  According to the invention which concerns on Claim 2, the right-and-left balance of the mowing apparatus approaches uniformly by attaching a hydraulic pump etc. and a mowing mechanism to the right and left of a connection bracket. For this reason, the mowing apparatus is not greatly shaken during traveling of the mobile agricultural machine, and handling such as attachment and detachment of the mowing apparatus can be facilitated.

  According to the invention which concerns on Claim 3, it is not necessary to provide the part which attaches a hydraulic-oil tank to a connection bracket. For this reason, a connection bracket becomes small and handling, such as attachment and detachment of a mowing apparatus, can be made easy.

The left view which shows the structure of the riding type rice transplanter with which the mowing apparatus which concerns on one Embodiment of this invention was mounted | worn. The rear view of the connection bracket with which the mowing apparatus which concerns on one Embodiment of this invention is equipped. The left view of the connection bracket with which the mowing apparatus which concerns on one Embodiment of this invention comprises. The top view which shows the structure of the mowing apparatus which concerns on one Embodiment of this invention. It is a figure which shows typically the structure of the mowing mechanism with which the mowing apparatus which concerns on this invention was equipped, (a) is a left view, (b) is a front view. It is a figure which shows the state which removes the mowing apparatus which concerns on one Embodiment of this invention from a riding type rice transplanter, (a) is a top view, (b) is a left view.

  Below, the whole structure of the rice transplanter 1 with which the mowing apparatus 100 was mounted | worn is demonstrated with reference to FIG.1 and FIG.2.

  The rice transplanter 1 which is one embodiment of the mobile agricultural machine according to the present invention performs planting work of seedlings on paddy fields in a state where an operator is on board. As shown in FIG. 1, the rice transplanter 1 includes a traveling unit 10 and a lifting link mechanism 20, and a seedling planting device (not shown) is attached to the tip (rear end) of the lifting link mechanism 20. Configured to be able to. In the following description, the front-rear direction is defined with the arrow F direction as “front”, the left-right direction is defined with the arrow R direction as the right, and the up-down direction is defined with the arrow U direction as “upward”.

  In the traveling unit 10, the engine 2 is provided at the front portion of the traveling machine body 3 and is covered with the bonnet 4. The transmission case is supported by the front part of the traveling machine body 3 and is disposed below the engine 2.

  The front axle case 5 is supported on the front portion of the traveling machine body 3, and the front wheels 6 are supported on both the left and right sides of the front axle case 5. The rear axle case 7 is supported on the rear portion of the traveling machine body 3, and the rear wheels 8 are supported on both the left and right sides of the rear axle case 7.

  The power of the engine 2 is transmitted to the left and right front wheels 6 and the left and right rear wheels 8 through the transmission case, respectively, so that the front wheels 6 and the rear wheels 8 are rotationally driven. Thereby, the traveling unit 10 can travel forward or backward.

  In the traveling unit 10, a driving operation device 11 is provided in the middle part before and after the traveling machine body 3. An annular steering handle 12 for steering operation, various operation pedals 13, a dashboard 14, and the like are disposed at the front portion of the driving operation device 11. A driver's seat 15 is disposed behind the steering handle 12 at the rear of the driving operation device 11.

  On the dashboard 14, in addition to the steering handle 12, various operating tools and display devices are arranged. It is possible to operate the traveling unit 10 and the like with these operating tools, the steering handle 12, the various operation pedals 13, and the like.

  A lifting link mechanism 20 is provided at the rear of the traveling machine body 3. The elevating link mechanism 20 includes a pair of left and right upper links 21 and 21, a pair of left and right lower links 22 and 22, a rotating arm 25, a hydraulic cylinder 26, and the like.

The pair of upper links 21 and 21 are provided in parallel to each other with an interval in the left-right direction. One end portions (front end portions) of the upper links 21 and 21 are supported to be rotatable in the vertical direction with the shaft member 23 as a fulcrum.
The pair of lower links 22 and 22 are provided in parallel to each other with an interval in the left-right direction. One end portions (front end portions) of the lower links 22 and 22 are supported to be rotatable in the vertical direction with the shaft member 24 as a fulcrum.
As will be described later, an upper connecting pin 27 is detachably attached to the other end portion (rear end portion) of the upper links 21 and 21. Moreover, the lower connection pin 28 is detachably attached to the other end portion (rear end portion) of the lower links 22 and 22. As a result, a connection bracket 31 described later can be detachably attached to the rear end of the elevating link mechanism 20 by the upper connection pin 27 and the lower connection pin 28.

The rotary arm 25 is a rod-shaped member, and one end (lower end) thereof is fixed between the lower links 22 and 22.
The hydraulic cylinder 26 is an actuator for moving up and down a working machine (the mowing apparatus 100 or the seedling planting apparatus) attached to the lift link mechanism 20. One end of the hydraulic cylinder 26 is connected to the other end (upper end) of the rotary arm 25. The other end of the hydraulic cylinder 26 is connected to the traveling machine body 3.

  In the lifting / lowering link mechanism 20 having such a configuration, when the hydraulic cylinder 26 is extended, the upper links 21 and 21 and the lower links 22 and 22 are rotated downward while maintaining a parallel state. On the other hand, when the hydraulic cylinder 26 is reduced, the upper links 21 and 21 and the lower links 22 and 22 are rotated upward while maintaining a parallel state. Thus, the elevating link mechanism 20 constitutes a so-called parallel link mechanism. The configuration of the lifting link mechanism may be, for example, a three-point link type or a two-point link type instead of the above configuration.

  Below, the structure of the mowing apparatus 100 which concerns on one Embodiment of this invention is demonstrated in detail with reference to FIGS.

  As shown in FIG. 1, the mowing apparatus 100 is an apparatus that can be attached to the rear end (front end) of the elevating link mechanism 20, and can be attached instead of the seedling planting apparatus. By attaching the mowing apparatus 100 to the rice transplanter 1, weeds and the like that grow on the shore, bank, side of the farm road, etc. can be cut by the mowing apparatus 100 while the operator travels the traveling machine body 3. The mowing apparatus 100 includes a connection bracket 31, a cutting engine 32, a hydraulic pump 33, a hydraulic oil tank 34, a parallel link mechanism 40, a swing link mechanism 45, a cutting mechanism 50, and the like.

  As shown in FIGS. 2 and 3, the connection bracket 31 connects the mowing apparatus 100 to the lift link mechanism 20. The connection bracket 31 is detachably supported at the front end (rear end portion) of the elevating link mechanism 20 with respect to the upper links 21 and 21 and the lower links 22 and 22. The connection bracket 31 is a substantially F-shaped member when viewed from the left side, and includes a vertical frame 31a, an upper plate 31b, a lower plate 31c, and the like.

  The vertical frame 31a is formed so that the upper connecting pin 27 and the lower connecting pin 28 can be inserted detachably. The upper plate 31b is fixed substantially vertically from the upper end of the vertical frame 31a toward the rear. The lower plate 31c is fixed below the upper plate 31b so as to be substantially parallel to the upper plate 31b. Between the lower surface of the upper plate 31b and the upper surface of the lower plate 31c, horizontal arms 41 and 41 of a parallel link mechanism 40 described later are disposed. The connection bracket 31 is detachably connected by the upper connection pin 27 and the lower connection pin 28 so that the vertical frame 31a is substantially perpendicular to the front end (rear end portion) of the elevating link mechanism 20. That is, the connecting bracket 31 is supported by the elevating link mechanism 20 so as to be movable up and down and detachable while keeping the upper plate 31 b and the lower plate 31 c in parallel.

  The mowing engine 32 is a drive source of the mowing apparatus 100. The mowing engine 32 is disposed at the approximate center of the upper plate 31 b of the connection bracket 31. More specifically, the harvesting engine 32 is arranged so that its output shaft protrudes to the left, and a drive shaft of a hydraulic pump 33 described later is connected to the output shaft.

  The hydraulic pump 33 is a pump driven by the mowing engine 32. The hydraulic pump 33 is disposed on the left side of the upper plate 31 b of the connection bracket 31. The hydraulic pump 33 is connected to and driven by the output shaft of the cutting engine 32.

  The hydraulic oil tank 34 is a tank that stores hydraulic oil. The hydraulic oil tank 34 is provided at a position on the left side of the upper plate 31 b of the connection bracket 31 and above the hydraulic pump 33. For this reason, it is not necessary to provide a portion for attaching the hydraulic oil tank 34 to the connection bracket 31. The hydraulic oil tank 34 is connected to the suction port of the hydraulic pump 33 via a pipe (not shown). The hydraulic pump 33 is connected to a hydraulic motor 53 of a reaping mechanism 50 described later via a switching valve (see FIG. 4).

  By being configured in this way, the mowing apparatus 100 is not driven by the engine 2 provided in the traveling unit 10 of the rice transplanter 1, so that the mowing work can be performed stably regardless of the operating state of the rice transplanter 1. . Further, by detaching the connecting bracket 31 from the lifting / lowering link mechanism 20, the harvesting engine 32, the hydraulic pump 33, and the hydraulic oil tank 34 are integrally detached from the lifting / lowering link mechanism 20 together with the parallel link mechanism 40 and the cutting mechanism 50 described later. be able to.

  As shown in FIG. 4, the parallel link mechanism 40 supports the mowing mechanism 50. The parallel link mechanism 40 includes horizontal arms 41 and 41, rotation shafts 42 and 42, a rotation fixing plate 43, an urging member 44, a swing link mechanism 45 (see FIG. 5), and the like. Here, the horizontal arms 41 and 41 constitute a parallel link.

  The horizontal arms 41 and 41 are long rod-shaped members. One end portions of the horizontal arms 41 and 41 are rotatably supported between the lower surface of the upper plate 31b and the upper surface of the lower plate 31c at the right front end portion of the connection bracket 31 via the rotation shaft 42 (see FIG. 3). Here, the rotating shaft 42 has a through hole formed in the right end portion of the connection bracket 31 and a through hole formed in one end portion of the horizontal arms 41 and 41 with the axial direction thereof being directed in the vertical direction. , Is inserted.

  The rotation fixed plate 43 is a generally fan-shaped plate material. The rotation fixing plate 43 is fixed to the horizontal arm 41 so that the center thereof coincides with the axis of the rotation shaft 42 that supports the horizontal arm 41. Through holes 43h, 43h,... Are formed at predetermined intervals on the peripheral edge of the rotation fixing plate 43 (the circular arc portion of the fan). The rotation fixing plate 43 is overlapped with any one of the screw holes 31h formed in the connection bracket 31 and the through holes 43h, 43h. The fastening member 43a is inserted into the screw hole 31h and the through hole 43h.

  With such a configuration, the rotation position of the rotation fixing plate 43 with respect to the connection bracket 31 is fixed. That is, the rotation position of the horizontal arms 41 and 41 with respect to the connection bracket 31 is fixed. In this embodiment, the rotation fixed plate 43 is a direction in which the horizontal arms 41 and 41 are parallel to the traveling direction of the rice transplanter 1, and the front end portion thereof from the rear position P <b> 1 arranged behind the rice transplanter 1. The direction perpendicular to the traveling direction of the rice transplanter 1 is configured to be fixed at a predetermined position within a range up to a side position P2 arranged on the right side of the rice transplanter 1. The

  The urging member 44 urges the horizontal arms 41 and 41. The biasing member 44 in this embodiment is a tension coil spring, and is interposed between a spring seat 44 a provided on the connection bracket 31 and a spring seat 44 b provided on the horizontal arm 41. A restriction member 44 c that restricts the rotation of the horizontal arm 41 is provided at the upper end of the connection bracket 31. The regulating member 44c of the present embodiment regulates the movement of the horizontal arms 41 and 41 so that the horizontal arms 41 and 41 are not closer to the rice transplanter 1 than the side position P2.

  Thus, when the fastening member 43a is detached from the rotation fixing plate 43 and the connection bracket 31, the urging member 44 holds the horizontal arms 41 and 41 at the side position P2, which is a position regulated by the regulating member 44c. Energize to do.

  As shown in FIGS. 4 and 5, the swing link mechanism 45 supports the mowing mechanism 50 so as to be swingable at the tip of the parallel link mechanism 40 (the end opposite to the connection bracket 31). . The swing link mechanism 45 is interposed between the front ends of the horizontal arms 41 and 41 and the cutting mechanism 50. The swing link mechanism 45 includes an upper bracket 46a, a lower bracket 46b, vertical arms 47 and 47, a stay 48, a rotating shaft 49, and the like.

  The upper bracket 46a is a member formed by bending a plate material. The upper bracket 46a is rotatably supported by the other ends of the horizontal arms 41 and 41. At this time, the upper bracket 46a is supported by horizontal arms 41 and 41 arranged in parallel to each other. That is, the connecting bracket 31, the horizontal arms 41 and 41, and the upper bracket 46a constitute a parallel link mechanism. Thereby, the upper bracket 46a is supported by the horizontal arms 41 and 41 so as to be movable in a horizontal plane while being held in a fixed direction (front-rear direction).

  The lower bracket 46 b connects the lower ends of the vertical arms 47 and 47 and the stay 48. The lower bracket 46b of the present embodiment is a member formed by bending a rectangular plate material into a U-shape when viewed from the front. A stay 48 is fixed to the lower part of the lower bracket 46b so as to protrude downward.

  The vertical arms 47 are long rod-shaped members. One end portions (upper end portions) of the vertical arms 47 and 47 are supported by the upper bracket 46a so as to be rotatable in the front-rear direction. The lower bracket 46b is supported at the other end (lower end) of the vertical arms 47 and 47 so as to be rotatable in the front-rear direction. At this time, the lower bracket 46b is supported by vertical arms 47 and 47 arranged in parallel to each other. That is, the upper bracket 46a, the vertical arms 47 and 47, and the lower bracket 46b constitute a parallel link mechanism. The stay 48 fixed to the lower bracket 46b is connected to a cutting mechanism 50 described later via a rotating shaft 49 whose axis extends in the front-rear direction. As a result, the swing link mechanism 45 supports the reaping mechanism 50 so as to be movable in a vertical plane in a state where the reaping mechanism 50 is held at a constant inclination (front-rear direction) with respect to the upper bracket 46a. Further, the swing link mechanism 45 supports the reaping mechanism 50 via the rotating shaft 49 so as to be rotatable in the left-right direction with respect to the upper bracket 46a.

  As described above, the parallel link mechanism 40 is supported so as to be movable in a horizontal plane while maintaining the orientation of the cutting mechanism 50 in the front-rear direction, and to be movable in a vertical plane while maintaining the inclination of the cutting mechanism 50 in the front-rear direction. To do. Further, in the connection bracket 31 of the mowing apparatus 100, the parallel link mechanism 40 is disposed at the right front end portion, and the hydraulic pump 33 and the hydraulic oil tank 34 are disposed at the left end portion. For this reason, since the right and left balance of the mowing apparatus 100 approaches uniformly, handling such as attachment and detachment of the mowing apparatus 100 can be facilitated.

  As shown in FIGS. 4 and 5, the mowing mechanism 50 is a device for performing an operation (mowing) of mowing weeds and the like growing on a shore or a farm road (the ground surface). The cutting mechanism 50 includes left and right cutting covers 51L and 51R, left and right cutting blades housed inside the cutting covers 51L and 51R, a hydraulic motor 53 that rotationally drives the left and right cutting blades, a cover rotating shaft 54, a front gauge A wheel 55, a roller 56, a gauge wheel 57, a rubber sag 58L, 58C, 58R and the like are provided.

The cutting cover of the present embodiment is divided into left and right parts. The left cutting cover 51L can be rotated in the vertical direction with respect to the right cutting cover 51R with the cover rotation shaft 54 as a fulcrum, and can be fixed at an appropriate rotational position.
With such a configuration, the left and right cutting blades can follow an inclined surface such as a slope. For example, it is possible to use in such a manner that mowing on the slope of the shore is performed in a state where the left half and the right half of the mowing mechanism 50 are arranged in a single plane (the same). Alternatively, a mode of use is also possible in which grass cutting is performed on the upper half of the ridge with the right half of the cutting mechanism 50, and simultaneously, grass cutting on the slope of the ridge is performed with the left half of the cutting mechanism 50.

  The left and right cutting blades (not shown) are blade-type rotary blades. The left cutting blade is fixed to a lower end of a left rotation shaft that is rotatably provided in the left cutting cover 51L. The right cutting blade is fixed to the lower end of the right rotation shaft that is rotatably provided in the right cutting cover 51R. The left rotation shaft and the right rotation shaft are connected via a bevel gear and a retractable drive shaft 52. The cutting blade is not limited to a blade type, and may be a clipper type or a reel type, for example.

The hydraulic motor 53 is a motor for rotationally driving the cutting blade. The hydraulic motor 53 is mounted on the right cutting cover 51R. The output shaft of the hydraulic motor 53 is disposed so as to protrude to the left side, and the output shaft and the drive shaft of the cutting blade are connected. With such a configuration, the hydraulic motor 53 is driven by feeding hydraulic oil from the hydraulic pump 33, and the cutting blade is driven to rotate.
However, the mode of driving the cutting blade is not limited to the above-described one. For example, the hydraulic motor 53 is disposed in the connection bracket 31, and the output shaft of the hydraulic motor 53 and the driving shaft of the cutting blade are connected by a flexible wire. Then, the cutting blade may be driven. Alternatively, a configuration in which the hydraulic motor is not provided, a clutch or a transmission mechanism is connected to the output shaft of the cutting engine 32, and the cutting blade is connected by connecting the output shaft of the transmission mechanism and the driving shaft of the cutting blade with a flexible wire. It may be configured to drive.

  The front gauge wheel 55, the roller 56, and the gauge wheel 57 adjust the height of the cutting blade with respect to the ground surface as appropriate. The front gauge wheel 55 is attached to an attachment portion provided on the right cutting cover 51R so that the height can be adjusted. The roller 56 is attached to the rear end portion of the right cutting cover 51R via an attachment stay. The gauge wheel 57 is attached to an attachment part provided at the front part of the left cutting cover 51L so that the height can be adjusted. As the front gauge wheel 55, the roller 56, and the gauge wheel 57 roll on the ground surface, the cutting mechanism 50 is smoothly moved along the ground surface.

It is also possible to adopt a configuration in which the weight can be attached to the cutting mechanism 50 by forming a weight (weight) attachment portion on the left cutting cover 51L. When the slope of the ridge is a steep slope, it is possible to improve the followability of the cutting mechanism 50 to the ground surface by pressing the left gauge ring 57 against the slope by attaching the weight.
Alternatively, the right and left cutting covers 51L and 51R are attached to the ground surface of the cutting mechanism 50 by adding an urging member that urges them to rotate away from each other (in a spreading direction) with the cover rotation shaft 54 as a fulcrum. It is also possible to improve the performance.

  The rubber sag 58L / 58C / 58R prevents the pebbles and the like jumped up by the rotation of the cutting blades from being scattered around the cutting mechanism 50. The left rubber dripping 58L is hung from the front left end of the left cutting cover 51L and covers the left cutting blade and the gauge ring 57L from the front. The right rubber droop 58R is hung from the front right end of the right cutting cover 51R and covers the right cutting blade and the gauge wheel 57R from the front. The rubber sag 58C is disposed between the left and right rubber sag 58L and 58R, and is hung down between the front gauge wheel 55 and the gauge wheel 57.

  In addition, the front-end part of the cutting mechanism 50 in this embodiment is formed so that it may leave | separate from the ground surface as the cutting covers 51R and 51L go forward. In other words, the front end portion of the cutting cover has a large opening shape. With this configuration, weeds and the like are easily guided into the mowing mechanism 50. In the present embodiment, the shape of the cutting cover is not limited to the above-described one, and for example, the rear end portion of the cutting cover may have a shape that is opened largely like the front end portion. When comprised in this way, it can prevent that the weeds etc. which were cut off remain in the inside of a cutting mechanism.

  In the mowing apparatus 100 configured as described above, the cutting mechanism 50 is configured to be movable by the parallel link mechanism 40 within a range from the rear position P1 to the side position P2.

  Below, the usage aspect of the mowing apparatus 100 of such a structure is demonstrated using FIGS. 4-6.

  When the rice transplanter 1 is moved to another field or the like, as shown in FIG. 4, the mowing device 100 is arranged at a rear position P1 where the mowing mechanism 50 is behind the traveling machine body 3, and the connection bracket 31 and the rotation fixing plate 43. As a result, the width (dimension in the left-right direction) of the combined traveling machine body 3 and the mowing apparatus 100 becomes compact. Accordingly, the rice transplanter 1 can easily travel on a narrow road or the like without the mowing device 100 getting in the way.

  When mowing work is performed with the mowing mechanism 50 disposed at a predetermined position, as shown in FIGS. 4 and 5, the mowing apparatus 100 has a desired mowing mechanism 50 between the rear position P1 and the side position P2. It is arranged at a position and is fixed by the connecting bracket 31 and the rotation fixing plate 43. As a result, the mowing apparatus 100 can perform the mowing work with the mowing mechanism 50 fixed at a desired position. When the positions of the horizontal arms 41 and 41 are fixed as described above, it is not necessary to urge the urging member 44 to the side position P2 side, and the urging member 44 is prevented from being loaded. Therefore, the biasing member 44 is removed from the spring seat 44a or the spring seat 44b.

  When the mowing operation is performed so that the mowing mechanism 50 follows the shore or the like, the mowing apparatus 100 has the biasing member 44 coupled to the spring seat 44a and the spring seat 44b, and the horizontal arms 41 and 41 are moved forward (sideways). It is urged to rotate to the position P2 side. As a result, the cutting mechanism 50 can move to an arbitrary position while being urged by the urging force of the urging member 44 so that the horizontal arms 41 and 41 rotate forward (side position P2 side). Therefore, in the mowing apparatus 100, the cutting mechanism 50 follows the heddle and the like by the horizontal link mechanism 40 and the swing link mechanism 45.

  Specifically, when the rice transplanter 1 approaches the shore, the cutting mechanism 50 is pressed against the slope of the shore, but the horizontal arms 41 and 41 are moved backward against the urging force of the urging member 44. Since it is rotated to (rear position P1 side), it can be avoided that a large load is applied. Moreover, since the vertical arms 47 and 47 are rotated backward when the height of the shore increases, it is possible to avoid applying a large load to the cutting mechanism 50.

  When the traveling machine body 3 moves away from the shore, the parallel link mechanism 40 is rotated forward (side position P2 side) by the urging force of the urging member 44, so that the cutting mechanism 50 is pressed against the slope side of the shore. . Further, when the height of the shore is lowered, the vertical arms 47 and 47 are rotated forward and are not separated from the slope of the shore.

  As described above, the cutting mechanism 50 is prevented from being separated from the ground surface by the action of the parallel link mechanism 40 and the swing link mechanism 45 in accordance with the change in the distance from the traveling machine body 3 to the shore (ground surface). The followability to the surface can be improved. Therefore, the operator does not need to pay special attention to adjusting the position of the harvesting mechanism 50, and can concentrate on the steering operation of the rice transplanter 1.

  In addition, the expansion and contraction of the urging member 44 prevents the components constituting the parallel link mechanism 40 and the swing link mechanism 45 from being subjected to a large impact load, thereby preventing the components from being deformed or damaged. can do.

  Furthermore, when mowing is finished and the mowing mechanism 50 is raised, an external force is not suddenly applied to the horizontal arms 41 and 41. In this case, the horizontal arms 41 and 41 are pulled forward by the urging members 44 and rotate forward, but the front surfaces of the horizontal arms 41 and 41 abut against the regulating member 44c and rotate further forward. There is no. Therefore, the cutting mechanism 50 does not suddenly rotate toward the traveling machine body 3 to damage the traveling machine body 3, and the weight balance is not greatly lost.

When removing the mowing apparatus 100 from the rice transplanter 1, the upper connection pin 27 and the lower connection pin 28 are removed from the vertical frame 31a of the connection bracket 31 with the mowing mechanism 50 fixed at the rear position P1, as shown in FIG. (See white arrow). That is, the connection between the upper link 21 and the lower link 22 of the elevating link mechanism 20 and the connection bracket 31 is released. And the mowing apparatus 100 can be integrally removed from the rice transplanter 1 by removing the connection bracket 31 from the raising / lowering link mechanism 20 of the rice transplanter 1 (refer to the black arrow).
Even when the mowing apparatus 100 is attached to the rice transplanter 1, the mowing apparatus 100 is integrated with the rice transplanter 1 by attaching the connection bracket 31 to the lift link mechanism 20 of the rice transplanter 1 by the upper connection pin 27 and the lower connection pin 28. Can be attached. In this way, the mowing apparatus 100 can be easily attached and detached from the rice transplanter 1. However, the attachment / detachment configuration of the elevating link mechanism 20 and the connection bracket 31 is not limited to the above-described configuration, but a hook one-touch type (so-called auto hitch) attachment / detachment in which a hook is formed on the upper link side and a lock lever mechanism is formed on the lower link side. A configuration is also possible.

As mentioned above, it is the mowing apparatus 100 which can be attached or detached to the raising / lowering link mechanism 20 provided in the front part or the rear part of the traveling machine body 3 of the rice transplanter 1 which is a mobile agricultural machine, and is connected to the raising / lowering link mechanism 20 detachably. A bracket 31, a cutting engine 32 attached to the connection bracket 31, a hydraulic pump 33 attached to the connection bracket 31 and driven by the cutting engine 32, and a hydraulic oil attached to the connection bracket 31 and delivered from the hydraulic pump 33 Is provided with a hydraulic oil tank 34, a parallel link mechanism 40 attached to the connection bracket 31, and a cutting mechanism 50 attached to the parallel link mechanism 40 and driven by hydraulic oil fed from the hydraulic pump 33. .
With this configuration, the mowing mechanism 50 is driven by the mowing engine 32 provided in the mowing apparatus 100. For this reason, the cutting operation can be performed stably without being affected by the operating state of the engine 2 of the rice transplanter 1 which is a mobile farm machine. In addition, it is not necessary to consider the rated output of the engine 2 of the rice transplanter 1, the rotational speed of the PTO, the capacity of the hydraulic pump provided in the rice transplanter 1, and the like. Moreover, since the mowing apparatus 100 is attached to the lifting / lowering link mechanism 20 via the connection bracket 31, the hydraulic piping is simplified and can be integrally detached from the rice transplanter 1. For this reason, attachment / detachment, storage, adjustment, and the like of the mowing apparatus 100 (the mowing engine 32, the hydraulic pump 33, the hydraulic oil tank 34, the mowing mechanism 50, and the piping connecting them) can be facilitated.

Further, the cutting engine 32 is attached to substantially the center of the connection bracket 31, the hydraulic pump 33 and the hydraulic oil tank 34 are attached to the left and right sides of the connection bracket 31, and the parallel link mechanism 40 is connected to the connection bracket 31. It is attached to the left and right other side.
By configuring in this way, the left and right balance of the mowing device 100 approaches evenly by attaching the hydraulic pump 33 and the like and the mowing mechanism 50 to the left and right of the connection bracket 31. For this reason, the mowing apparatus 100 is not greatly shaken when the rice transplanter 1 is traveling, and handling such as attachment and detachment of the mowing apparatus 100 can be facilitated.

The hydraulic oil tank 34 is attached to a position above the hydraulic pump 33 and overlapping with the hydraulic pump 33.
By configuring in this way, it is not necessary to provide the connecting bracket 31 with a portion to which the hydraulic oil tank 34 is attached. For this reason, the connection bracket 31 becomes small, and handling such as attachment and detachment of the mowing apparatus 100 can be facilitated.

1 Rice transplanter (mobile farm machine)
DESCRIPTION OF SYMBOLS 3 Traveling body 20 Lifting link mechanism 31 Connection bracket 32 Mowing engine 33 Hydraulic pump 34 Hydraulic oil tank 40 Parallel link mechanism 50 Mowing mechanism 100 Mowing device

Claims (3)

A mowing device that can be attached to and detached from a lifting link mechanism provided at the front or rear of a traveling machine body of a mobile agricultural machine,
A connecting bracket detachably attached to the lifting link mechanism;
A cutting engine attached to the connecting bracket;
A hydraulic pump attached to the coupling bracket and driven by the mowing engine;
A hydraulic oil tank that is attached to the connection bracket and in which hydraulic oil sent out by the hydraulic pump is stored;
A parallel link mechanism attached to the connecting bracket;
A mowing mechanism, which is attached to the parallel link mechanism, and is driven by hydraulic oil sent out by the hydraulic pump. The cutting engine is
Attached to the left and right center of the connecting bracket,
The hydraulic pump and the hydraulic oil tank are
Attached to the left and right sides of the connecting bracket,
The parallel link mechanism is
The mowing device according to claim 1, wherein the mowing device is attached to left and right other sides of the connection bracket. The hydraulic oil tank is
The mowing apparatus according to claim 1, wherein the mowing apparatus is attached to a position above the hydraulic pump and overlapping with the hydraulic pump.

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