JP6328470B2 - Granular material spraying device and spraying vehicle equipped with the same - Google Patents

Description

  The present invention mainly relates to a gear support structure for transmitting a driving force to a feeding roll in a direct sowing apparatus for spraying seeds.

  There is known a direct sowing device (granular material spraying device) that feeds seeds (particulate solid matter) little by little and sprays them on a field. The direct sowing apparatus includes a hopper that stores seeds and a feeding case that is disposed below the hopper. In the feeding case, a feeding roll having a feeding hole formed in the peripheral surface is provided. By rotating the feeding roll, the seeds in the hopper are taken into the feeding hole little by little and released toward the ground of the field.

  In this type of direct seeding apparatus, the feeding case supports a feeding shaft that is a rotating shaft of the feeding roll. A driven gear is fixed to the feeding shaft. Such a configuration is described in Patent Document 1, for example.

  In Patent Document 1, a driving gear for inputting a driving force to a driven gear is provided. Power from the engine is input to the rotation shaft (seeding drive shaft) of the drive gear. With the configuration of Patent Document 1, each feeding roll can be driven by power from the engine.

JP 2013-132235 A

  In the configuration of Patent Document 1, the rotation shaft (feeding shaft) of the driven gear is supported by the feeding case. On the other hand, the rotation shaft of the drive gear (seeding drive shaft) is supported by the bracket. A feeding case is fastened and attached to a first support member made of a square pipe member provided from the bracket by a bolt.

  In such a configuration of Patent Document 1, due to the influence of the attachment accuracy of the supply case to the first support member, the forming accuracy of the supply case, the assembly accuracy of the bracket and the first support member, etc., the rotation shaft of the driven gear (the supply shaft) ) And the rotation shaft of the drive gear (seeding drive shaft). As a result, the meshing between the driven gear and the drive gear may become worse.

  Therefore, the main object of the present invention is to provide a direct seeding device in which a variation between the cores of the driven gear and the drive gear for driving the feeding roll is suppressed and the meshing accuracy between the driven gear and the drive gear is improved. There is to do.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to the viewpoint of this invention, the granular material spreading | diffusion apparatus of the following structures is provided. That is, the granular material spraying apparatus includes a hopper that accommodates the granular material, and a feeding case that is disposed below the hopper and is supplied with the granular material. In the feeding case, a feeding roll for feeding the granular material by a predetermined amount is provided. The feeding case includes a driven gear support that supports a driven gear that rotates integrally with the feeding roll, and a drive gear support that supports a drive gear that meshes with the driven gear. The driven gear support portion is provided with an insertion hole. An outer peripheral surface formed integrally with the driven gear is rotatably supported by an inner peripheral surface of the insertion hole of the driven gear support portion. The drive gear support is provided with an insertion hole. An outer peripheral surface formed integrally with the drive gear is rotatably supported by an inner peripheral surface of the insertion hole of the drive gear support portion. The granular material spraying apparatus includes a plurality of the feeding cases. Each feeding case is provided with a drive transmission shaft that is arranged with its axis aligned with the drive gear and transmits a driving force to the drive gear. The drive transmission shaft is provided independently for each feeding case. The granular material spraying device includes a connecting portion that connects the drive transmission shafts of adjacent feeding cases. In each feeding case, a clutch mechanism is provided between the drive transmission shaft and the drive gear to connect and disconnect the power of the drive transmission shaft with respect to the drive gear. The clutch mechanism includes a clutch member that can slide in the axial direction of the drive transmission shaft. As the clutch member slides in the axial direction of the drive transmission shaft and the power from the drive transmission shaft to the drive gear is cut off, the rotation of the driven gear stops.

As described above, since both the driven gear and the drive gear are supported by the feeding case, the distance between the cores of the driven gear and the driving gear (the distance between the axes) is determined only by the accuracy of the feeding case. Thereby, the variation between the cores of the driven gear and the drive gear can be suppressed, and the gear meshing accuracy can be improved. In addition, since the drive transmission shaft is provided independently for each feeding case, the feeding case and the driving transmission shaft can be collectively handled as one unit. And a driving force can be transmitted to all the drive transmission shafts by connecting the drive transmission shafts of the adjacent feeding cases with the connecting portion. Since the drive transmission shaft is individually provided for each feeding case, if the clutch mechanism is provided for each feeding case, the driving transmission shaft, the clutch mechanism, and the feeding case can be collectively handled as one unit. .

  In the granular material spraying device, it is preferable that the driven gear support portion and the drive gear support portion are integrally formed.

  Thus, by integrally forming the driven gear support portion and the drive gear support portion, the positions of the driven gear support portion and the drive gear support portion are determined only by the forming accuracy of the feeding case. Therefore, the center of the driven gear and the drive gear is not affected by the assembly accuracy. Thereby, the gear meshing accuracy can be further improved.

  The granular material spraying device is preferably configured as follows. That is, the feeding roll has an adjustment mechanism that can adjust the amount of the granular material to be fed. The feeding case includes an adjustment gear fixed to the adjustment shaft of the adjustment mechanism, and an operation gear support portion that supports an operation gear that can mesh with the adjustment gear.

  Thus, by supporting the operation gear on the feeding case, the distance between the operation gear and the center of the adjustment gear is determined only by the accuracy of the feeding case. Thereby, the variation between the cores of the adjustment gear and the operation gear can be suppressed, and the meshing accuracy of the adjustment gear and the operation gear can be improved.

  According to another aspect of the present invention, there is provided a spraying work vehicle including the granular material spraying device described above and a vehicle body that can travel by mounting the granular material spraying device.

  This scattering work vehicle has improved meshing accuracy between the driven gear and the drive gear, and can therefore travel while driving the feeding roll stably. Thereby, a granular material can be sprayed reliably and stably.

1 is a side view showing an overall configuration of a scattering work vehicle according to an embodiment of the present invention. The front view of a direct seeding apparatus. The perspective view of a feeding case. The side view of a hopper and a feeding case. Side surface sectional drawing of a hopper and a feeding case. The rear sectional view of a feeding case. The back sectional view of a feeding roll. The perspective view of a feeding roll. The assembly perspective view of a clutch mechanism.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of an agricultural application work vehicle 1 according to an embodiment of the present invention.

  The spreading work vehicle 1 includes a vehicle body 2 and a direct seeding device (granular material spraying device) 3 disposed behind the vehicle body 2.

  The vehicle body 2 includes a pair of left and right front wheels 4 and rear wheels 5, and an engine 10 that is a drive source for the front wheels 4 and rear wheels 5. In addition, a driver's seat 6 on which an operator rides is provided at a position between the front wheel 4 and the rear wheel 5 in the front-rear direction of the vehicle body 2. In front of the driver seat 6, a steering handle 7 for the operator to steer the vehicle body 2 is disposed.

  The direct seeding device 3 is disposed behind the vehicle body 2. The direct seeding device 3 is attached to the vehicle body 2 via a coupling mechanism 12. The connection mechanism 12 is configured as a parallel link mechanism that can move the direct seeding device 3 up and down. Thereby, the up-and-down position of direct seeding device 3 can be adjusted. A PTO shaft 13 for outputting the driving force of the engine 10 to the direct seeding device 3 is disposed at the rear part of the vehicle body 2.

  The vehicle body 2 of the present embodiment has a so-called midship layout in which the engine 10 is disposed between the axles of the front wheels 4 and the rear wheels 5. A fuel tank (not shown) is disposed in the vicinity of the engine 10. However, the arrangement of the engine 10 and the fuel tank is not limited to this. For example, the engine 10 may be disposed in the hood at the front of the vehicle body or may be disposed at the rear of the vehicle body. Similarly, the fuel tank can be disposed in an arbitrary position such as in the hood at the front of the vehicle body or at the rear of the vehicle body.

  The direct sowing apparatus 3 is configured to spray seeds (seeds) on the ground little by little. The spreading work vehicle 1 can run seeds on the ground at substantially constant intervals by running while driving the direct sowing device 3.

  The vehicle body 2 of the present embodiment is configured as an agricultural multipurpose work vehicle, and other types of work machines can be attached instead of the direct seeding device 3. That is, the direct seeding device 3 of this embodiment is detachable from the connection mechanism 12 of the vehicle body 2. Then, an agricultural working machine (for example, a rice planting device, a weeding device, etc.) other than the direct sowing device 3 can be attached to the coupling mechanism 12.

  The direct seeding device 3 includes a frame 19, a hopper 20, and a feeding case 21.

  The frame 19 is connected to the connecting mechanism 12 described above. The frame 19 is, for example, a square pipe-like member, and is disposed along the left-right direction of the vehicle body 2 as indicated by a dotted line in FIG. The case 19 is attached to the frame 19 at equal intervals in the left-right direction. In addition, attachment of the frame 19 to the feeding case 21 can utilize appropriate means such as bolting.

  The feeding case 21 is configured to feed seeds little by little and release them toward the ground. The detailed configuration of the feeding case 21 will be described later. The direct sowing apparatus 3 of the present embodiment includes six feeding cases 21 arranged in the left-right direction so that the seeds for six strips can be sprayed simultaneously (see FIG. 2).

  The hopper 20 is a container for storing seeds (granular bodies) to be sown in a field. The upper part of the hopper 20 is open, and seeds can be put into the inside from the open upper part. Moreover, the hopper 20 is provided with the cover part 22 for covering the open upper part. The hopper 20 is fixed on the feeding case 21.

  The lower portion of the hopper 20 is a passage portion 23 formed in a funnel shape so as to become thinner as approaching the lower end portion thereof. Since the lower portion of the passage portion 23 is open, the seed in the hopper 20 can flow out to the lower side of the hopper 20 through the passage portion 23. In addition, the hopper 20 of this embodiment is comprised so that the seed for two strips may be accommodated. For this reason, as shown in FIG. 2, the lower portion of each hopper 20 is divided into two forks, and two passage portions 23 are formed in one hopper 20. And the feeding case 21 is being fixed to the lower part of each channel | path part 23. FIG. As described above, the direct seeding device 3 of the present embodiment includes six feeding cases 21 arranged side by side in the left-right direction, and accordingly, three hoppers 20 are arranged side by side in the left-right direction (see FIG. 2).

  Next, the configuration of the feeding case 21 will be described in detail.

  The feeding case 21 is made of resin and has a substantially box shape. The upper part of the feeding case 21 is open and serves as an opening 27 (see FIG. 3). The opening 27 of the feeding case 21 communicates with the passage portion 23 of the hopper 20. Thereby, the seed in the hopper 20 is supplied into the feeding case 21 through the opening 27 (see FIG. 5).

  As shown in FIG. 5, a feeding roll (feeding portion) 28 is provided in the feeding case 21 and below the opening 27. As shown in FIG. 8, the feeding roll 28 is configured as a substantially cylindrical member. As shown in FIG. 6, the feeding roll 28 has an axis 29 arranged in parallel with the left-right direction of the vehicle body 2 and is configured to be rotatable around the axis 29. As shown in FIGS. 5 to 8, the feeding hole 11 is formed on the peripheral surface of the feeding roll 28. A plurality of feeding holes 11 are formed at equal intervals in the circumferential direction of the feeding roll 28.

  As shown in FIG. 6, a driven gear 30 is provided outside the feeding case 21. The driven gear 30 is arranged so that the axis line coincides with the axis line 29 of the feeding roll 28. The driven gear 30 is connected to the feeding roll 28 so as not to rotate relative to the feeding roll 28. Thereby, the driven gear 30 and the supply roll 28 rotate integrally. Further, as shown in FIGS. 3 and 4, a driving gear 31 that meshes with the driven gear 30 and rotates is provided outside the feeding case 21.

  In addition, the drive transmission shaft 32 is disposed in the feeding case 21 in parallel with the left-right direction of the vehicle body. The drive transmission shaft 32 is disposed so as to coincide with the axis of the drive gear 31. The drive transmission shaft 32 and the drive gear 31 can be connected by a clutch mechanism 50 described later. Therefore, when the clutch mechanism 50 is connected, a driving force is input to the drive transmission shaft 32, whereby the drive gear 31 is rotationally driven around the axis.

  The direct seeding device 3 includes a drive output unit (not shown) that converts the rotational driving force of the engine 10 output from the PTO shaft 13 into an intermittent rotational motion and outputs it. The intermittent rotational motion output by the drive output unit is transmitted to the drive transmission shaft 32 to drive the drive gear 31 to rotate. When the drive gear 31 is rotationally driven in this manner, the driven gear 30 meshing with the drive gear 31 rotates, and the feeding roll 28 in the feeding case 21 is rotated.

  With the above configuration, the feeding roll 28 in each feeding case 21 can be intermittently driven at a predetermined speed in one direction. In addition, the structure which transmits the driving force which the drive output part output to the drive gear 31 is mentioned later.

  The seeds supplied from the hopper 20 to the feeding case 21 are taken into the feeding hole 11 by a predetermined amount (several grains) (see FIG. 5). When the feeding roll 28 is rotationally driven in one direction with the seeds taken into the feeding holes 11, the seeds taken into the feeding holes 11 can be conveyed downward. The seed taken into the feeding hole 11 is discharged downward from the feeding hole 11 when the feeding hole 11 faces downward.

  In the feeding case 21, the lower side of the feeding roll 28 is opened. Therefore, the seed discharged from the feeding hole 11 falls in the feeding case 21 (see the thick arrow in FIG. 5). A lower part of the feeding case 21 is a sowing guide 37. The sowing guide 37 is configured in a substantially cylindrical shape, and seeds can pass up and down through the inside. A lower end portion of the sowing guide 37 is a discharge port 38 opened downward. The discharge port 38 is disposed close to the ground. Therefore, the seeds fed by the feeding roll 28 fall in the sowing guide 37 and fall to the ground via the discharge port 38.

  With the feeding case 21 configured as described above, the seeds in the hopper 20 can be fed out by a predetermined amount and spread on the ground.

  Then, the characteristic structure of the direct sowing apparatus 3 of this embodiment is demonstrated.

  As described above, the feeding case 21 of the present embodiment is provided with the driven gear 30 and the drive gear 31 that meshes with the driven gear 30 and rotates.

  The driven gear 30 is supported by the side wall of the feeding case 21 (the left side wall 33 in this embodiment).

  More specifically, the support structure of the driven gear 30 is as follows. As shown in FIGS. 6 and 7, the driven gear 30 is fixedly provided with a cylindrical portion 45 that is formed in a cylindrical shape so that its axis coincides with the rotation axis of the driven gear 30. In the present embodiment, the cylindrical portion 45 is formed integrally with the driven gear 30.

  As shown in FIG. 7, an insertion hole 46 through which the cylindrical portion 45 can be inserted is formed in the left side wall 33 of the feeding case 21. The insertion hole 46 is configured as a round hole, and the diameter thereof is configured to substantially match the outer diameter of the cylindrical portion 45. Further, in a state where the cylindrical portion 45 is inserted into the insertion hole 46, the cylindrical portion 45 can rotate around the axis.

  With the above configuration, the driven gear 30 is inserted into the insertion hole 46 formed in the left side wall 33 of the feeding case 21 so that the driven gear 30 is inserted into the left side wall 33 of the feeding case 21. Is supported rotatably. A bearing (for example, a sliding bearing) may be provided between the inner peripheral surface of the insertion hole 46 and the outer peripheral surface of the cylindrical portion 45.

  Thus, since the driven gear 30 is rotatably supported by the left side wall 33 of the feeding case 21, the left side wall 33 can also be referred to as a “driven gear support portion”.

  As shown in FIG. 3, the driving case support 49 is fixedly provided in the feeding case 21. The drive gear support 49 is a rib-shaped portion that protrudes forward from the front surface of the feeding case 21. In the present embodiment, the drive gear support 49 is integrally formed with the left side wall 33 (driven gear support). The drive gear 31 is supported by a drive gear support portion 49.

  The support structure of the drive gear 31 will be specifically described as follows. As shown in FIG. 9, the drive gear 31 is fixedly provided with a cylindrical portion 47 formed in a cylindrical shape with the axis line coincident with the rotation axis of the drive gear 31. In the present embodiment, the cylindrical portion 47 is formed integrally with the drive gear 31.

  The drive gear support portion 49 is formed with an insertion hole (not shown) through which the cylindrical portion 47 can be inserted in the left-right direction. This insertion hole is configured as a round hole, and the diameter thereof is configured to substantially match the outer diameter of the cylindrical portion 47. Further, in a state where the cylindrical portion 47 is inserted into the insertion hole, the cylindrical portion 47 can rotate about the axis.

With the above configuration, the drive gear 31 is rotatably supported by the drive gear support 49 by inserting the cylindrical portion 47 integrally formed with the drive gear 31 into the insertion hole formed in the drive gear support 49. Has been. A bearing (for example, a sliding bearing) may be provided between the inner peripheral surface of the insertion hole formed in the drive gear support portion 49 and the outer peripheral surface of the cylindrical portion 47 .

  In a state where the drive gear 31 is supported by the drive gear support 49 and the driven gear 30 is supported by the left side wall 33 (driven gear support) of the feeding case 21, the drive gear 31 and the driven gear 30 are engaged with each other. It is configured (state shown in FIGS. 3 and 4).

  Incidentally, as described above, the drive gear support 49 is provided in the feeding case 21. Accordingly, it can be said that the drive gear 31 is supported by the feeding case 21. Further, since the driven gear 30 is supported by the left side wall 33 of the feeding case 21, it can be said that the driven gear 30 is supported by the feeding case 21.

  Thus, the direct seeding device 3 of the present embodiment supports both the drive gear 31 and the driven gear 30 by the feeding case 21. As a result, the meshing between the gears 30 and 31 is stabilized.

  For example, in Patent Document 1, the driven gear is supported by the feeding case, and the drive gear is supported by the bracket. For this reason, the distance between the driven gear and the driving gear (between the cores) varies due to the influence of the mounting case mounting accuracy with respect to the bracket, and as a result, the engagement between the driven gear and the driving gear may be deteriorated.

  On the other hand, in this embodiment, since both the driving gear 31 and the driven gear 30 are supported by the feeding case 21, the distance between the centers of the gears 30 and 31 is determined only by the accuracy of the feeding case 21. Thereby, the variation between cores can be minimized and the meshing between the gears 30 and 31 can be prevented from being deteriorated.

  In particular, in the present embodiment, the driven gear support portion (the left side wall of the feeding case 21) and the drive gear support portion 49 are integrally formed. Accordingly, the distance between the cores of the gears 30 and 31 is determined only by the molding accuracy of the feeding case 21 and is not affected by the assembly accuracy. As a result, the meshing between the drive gear 31 and the driven gear 30 is further stabilized.

  Next, the drive transmission shaft 32 of this embodiment will be described.

  In the direct seeding device 3 of the present embodiment, the drive transmission shaft 32 is provided independently for each feeding case 21. In addition, since the direct seeding apparatus 3 of this embodiment is provided with six feeding cases 21, it is provided with six drive transmission shafts 32.

  The direct seeding device 3 includes a connecting portion that connects the adjacent drive transmission shafts 32 to each other. The connecting portion of this embodiment includes a connecting shaft 68 and a connecting member 69.

  As shown in FIG. 3, the end of the drive transmission shaft 32 and the end of the connecting shaft 68 are connected by a connecting member 69. Notches (so-called D-cuts) 71 and the like are appropriately formed at the ends of the drive transmission shaft 32 and the connecting shaft 68, respectively. The connecting member 69 is configured to fit into the notch 71. Thereby, the drive transmission shaft 32 and the connecting shaft 68 can be connected by the connecting member 69 so as not to be relatively rotatable.

  As shown in FIG. 2, a connecting shaft 68 is disposed between the feeding cases 21. In the direct seeding device 3 of the present embodiment, the drive transmission shafts 32 of the adjacent feeding cases 21 are connected to each other by the connecting portion (the connecting shaft 68 and the connecting member 69) with the above configuration. In addition, since the direct sowing apparatus 3 of this embodiment is provided with six feeding cases 21, it is provided with five connecting shafts 68 in total. Thereby, the six drive transmission shafts 32 included in the direct seeding device 3 are connected to each other.

  A drive input gear 70 is fixed to any one of the five connecting shafts 68 included in the direct seeding device 3. As shown in FIG. 2, in the present embodiment, the drive input gear 70 is fixed to the central connecting shaft 68 among the five connecting shafts 68.

  The drive force output from the drive output unit is input to the drive input gear 70. When the driving force is input to the driving input gear 70, the driving input gear 70 is rotationally driven. As the drive input gear 70 is rotationally driven in this way, the six drive transmission shafts 32 provided in the direct seeding device 3 can be rotationally driven.

  According to the above configuration, the drive transmission shafts 32 of the six feeding cases 21 can be rotationally driven all at once.

  Then, the clutch mechanism 50 with which the feeding case 21 of this embodiment is provided is demonstrated. The clutch mechanism 50 switches connection / disconnection between the drive transmission shaft 32 and the drive gear 31.

  As shown in FIG. 3, the clutch mechanism 50 includes a clutch member 53. As shown in FIG. 9, the axial center portion of the drive transmission shaft 32 is a hexagonal shaft portion 52 having a hexagonal cross section. The clutch member 53 is attached to the hexagonal shaft portion 52 so as not to be relatively rotatable. The clutch member 53 is slidable in a direction parallel to the axis of the drive transmission shaft 32 (a direction indicated by a thick arrow in FIG. 9).

  Both ends of the drive transmission shaft 32 are formed in a round bar shape with a circular cross section. As shown in FIGS. 3 and 9, the drive gear 31 is attached to one end portion (round bar-like portion) of the drive transmission shaft 32. The drive gear 31 is configured to be able to rotate relative to the drive transmission shaft 32 around the axis.

  As shown in FIG. 9, the clutch member 53 is formed with a clutch-side engagement portion 54 that protrudes toward the drive gear 31. As shown in FIG. 9, the cylindrical portion 47 formed integrally with the drive gear 31 has a gear side engaging portion 55 that engages with the clutch side engaging portion 54 on the surface facing the clutch member 53 side. Is formed.

  When the clutch side engaging portion 54 and the gear side engaging portion 55 are engaged, the drive gear 31 and the clutch member 53 are coupled so as not to be relatively rotatable. As described above, since the clutch member 53 is not relatively rotatable with respect to the drive transmission shaft 32, the drive transmission shaft 32 and the drive gear are engaged by the engagement of the clutch side engagement portion 54 and the gear side engagement portion 55. 31 is connected so that relative rotation is impossible. Thereby, a driving force can be transmitted from the drive transmission shaft 32 to the drive gear 31.

  As described above, the clutch member 53 is slidable in the axial direction of the drive transmission shaft 32. By sliding the clutch member 53 in the direction away from the drive gear 31, the engagement of the clutch side engaging portion 54 and the gear side engaging portion 55 can be released. As a result, the connection between the drive gear 31 and the drive transmission shaft 32 is released. Accordingly, the driving force is not transmitted from the drive transmission shaft 32 to the drive gear 31.

  In the clutch mechanism 50 configured as described above, the state in which the drive gear 31 is connected to the drive transmission shaft 32 and the connection between the drive gear 31 and the drive transmission shaft 32 are released by sliding the clutch member 53. The state can be switched. Since the drive transmission shaft 32 is rotationally driven as described above, the drive gear 31 can be rotationally driven by connecting the drive gear 31 to the drive transmission shaft 32. When the drive gear 31 is rotationally driven, the driven gear 30 (see FIG. 4 and the like) meshing with the drive gear 31 is rotationally driven, so that the feeding roll 28 (non-rotatably connected to the driven gear 30) ( Is driven to rotate. Thereby, the feeding roll 28 in the feeding case 21 can be rotationally driven.

  In the present embodiment, as described above, the drive transmission shafts 32 of the respective feeding cases 21 can be rotationally driven at the same time by connecting the drive transmission shafts 32 to each other by the connecting portions (the connecting shaft 68 and the connecting member 69). Therefore, by connecting the drive gear 31 and the drive transmission shaft 32 in the clutch mechanism 50 of each feeding case 21, the feeding rolls 28 of each feeding case 21 can be driven all at once. Therefore, seeds can be spread all at once by the six feeding cases 21 provided in the direct sowing apparatus 3.

  On the other hand, if the coupling of the drive gear 31 and the drive transmission shaft 32 is released by sliding the clutch member 53, the rotation of the drive gear 31 can be stopped. Thereby, rotation of the supply roll 28 in the supply case 21 can be stopped. In the direct seeding device 3 of the present embodiment, since the clutch mechanism 50 is provided in each feeding case 21, the driving of the feeding roll 28 can be switched for each feeding case 21. Therefore, only a part of the feeding cases 21 can stop the driving of the feeding roll 28 to stop the seed spraying.

  The frame 19 provided in the direct seeding device 3 is provided with an operation member (not shown) that moves the clutch member 53 along the axial direction of the drive transmission shaft 32. This operation member is provided corresponding to each feeding case 21. This operation member can be arbitrarily operated by an operator on the driver's seat. Thereby, the operator can switch the driving presence / absence of the feeding roll 28 for each feeding case 21.

  Subsequently, a support structure of the drive transmission shaft 32 in the present embodiment will be described. As shown in FIG. 3, the drive gear 31 is attached to one end portion (left end portion) of the drive transmission shaft 32. As described above, the drive gear 31 is supported by the feeding case 21. Therefore, it can be said that the left end of the drive transmission shaft 32 is supported by the feeding case 21 via the drive gear 31.

  As shown in FIG. 3, the feeding case 21 is integrally provided with a transmission shaft support portion 48 for supporting the other end portion (right end portion) of the drive transmission shaft 32. The transmission shaft support 48 supports the right end of the drive transmission shaft 32 via a bearing. As described above, both ends of the drive transmission shaft 32 are supported by the feeding case 21.

  As described above, the clutch member 53 is attached to the drive transmission shaft 32. Therefore, it can be said that the clutch member 53 is supported by the feeding case 21 via the drive transmission shaft 32. As described above, the clutch mechanism 50 of the present embodiment is supported by the feeding case 21.

  As described above, in this embodiment, the drive transmission shaft 32, the clutch mechanism 50, and the drive gear 31 are individually provided for each feeding case 21, and these configurations are supported by the feeding case 21. Thereby, the drive transmission shaft 32, the clutch mechanism 50, the drive gear 31, and the feeding case 21 can be collectively handled as one unit. Therefore, when assembling the direct seeding device 3 of the present embodiment, the drive transmission shaft 32, the clutch mechanism 50, the drive gear 31 and the like are assembled in advance in the feeding case 21, and then the feeding case 21 is attached to the frame 19. good. Thereby, the assembly of the direct seeding apparatus 3 becomes easy.

  Next, a configuration for adjusting the seed application amount in the direct sowing apparatus 3 of the present embodiment will be described.

  The feeding roll 28 of the present embodiment is configured as a slide roll type feeding roll capable of adjusting the capacity of the feeding hole 11. That is, as shown in FIGS. 6 to 8, the feeding roll 28 is configured by combining the main body roll 57 and the fitting roll 58. The fitting roll 58 is slidable in a direction parallel to the axis 29 with respect to the main body roll 57.

  As shown in FIG. 8, the main body roll 57 and the fitting roll 58 are each configured in a substantially cylindrical shape. On the peripheral surface of the main body roll 57, the above-described feeding hole 11 is formed. The payout hole 11 is configured as a groove formed along a direction parallel to the axis 29. The fitting roll 58 is formed with a protruding portion 60 formed so as to protrude in a direction parallel to the axis 29. A plurality of the protrusions 60 are formed corresponding to the feeding holes 11 of the main body roll 57. And as shown in FIG. 8, the protrusion part 60 of the fitting roll 58 is comprised so that it can insert in the inside of the delivery hole 11 of the main body roll 57 from the axis line 29 direction. A portion of the feeding hole 11 where the protruding portion 60 is inserted is closed by the protruding portion 60. Therefore, the capacity of the feeding hole 11 can be changed by changing the insertion amount of the protruding portion 60 with respect to the feeding hole 11.

  With the above configuration, the capacity of the feeding hole 11 can be changed by moving the fitting roll 58 in a direction parallel to the axis 29 with respect to the main body roll 57. Thereby, the amount of seeds fed out by the feeding hole 11 can be adjusted.

  The feeding roll 28 is provided with a screw feeding mechanism (adjustment mechanism) 40 for adjusting the position of the fitting roll 58 in a direction parallel to the axis 29.

  As shown in FIG. 7, the screw feed mechanism 40 has a screw shaft (adjustment shaft) 41 that is arranged in alignment with the axis 29 of the feeding roll 28. A male screw is formed on the outer periphery of the screw shaft 41. On the other hand, the fitting roll 58 is formed with a female screw that is screwed into the male screw. With this configuration, by rotating the screw shaft 41, the fitting roll 58 is moved in a direction parallel to the axis 29, and the capacity of the feeding hole 11 is changed.

  As shown in FIG. 7, an adjustment gear 61 for operating the screw feeding mechanism 40 is provided outside the feeding case 21. The adjustment gear 61 is fixed to the screw shaft 41. As shown in FIG. 3, an operation gear 62 that can mesh with the adjustment gear 61 is provided outside the feeding case 21. By rotating the operation gear 62, the adjustment gear 61 is rotated, and the fitting roll 58 is moved in a direction parallel to the axis 29 by the screw feed mechanism 40. Thereby, the capacity | capacitance of the feeding hole 11 can be changed and the quantity which the said feeding hole 11 delivers a seed can be adjusted.

  As shown in FIG. 7, a flange portion 42 is provided at the end of the screw shaft 41. A detent mechanism 43 is provided between the flange portion 42 and the main body roll 57. The detent mechanism 43 is connected so that the main body roll 57 and the screw shaft 41 do not rotate relative to each other. Thereby, the fitting roll 58 and the screw shaft 41 are prevented from rotating relative to each other, and the position of the fitting roll 58 is prevented from moving freely in the direction of the axis 29.

  The detent mechanism 43 is configured to allow relative rotation between the main body roll 57 and the screw shaft 41 when a predetermined torque or more is applied. Accordingly, by inputting a predetermined torque to the adjustment gear 61, the screw shaft 41 and the fitting roll 58 can be rotated relative to each other to operate the screw feed mechanism 40.

  Next, a support structure for the operation gear 62 will be described.

  That is, the operation gear 62 can be supported by a member (for example, the frame 19) different from the feeding case 21. However, if the operation gear 62 is supported by the frame 19, the gap between the centers of the operation gear 62 and the adjustment gear 61 varies due to the influence of the mounting accuracy of the feeding case 21 with respect to the frame 19. For this reason, it is conceivable that the meshing between the operation gear 62 and the adjustment gear 61 becomes worse.

  Therefore, in the direct seeding device 3 of the present embodiment, the operation gear 62 is supported by the feeding case 21. Specifically, as shown in FIG. 3, an operation gear support portion 73 protruding in a rib shape toward the front is provided on the front surface of the feeding case 21. The operation gear support 73 is configured to rotatably support the operation gear 62. Note that the operation gear support portion 73 of this embodiment is formed integrally with the feeding case 21.

  Thus, in this embodiment, since the operation gear 62 is supported by the feeding case 21, the distance between the operation gear 62 and the adjustment gear 61 is determined only by the accuracy of the feeding case 21. Thereby, since the meshing of the adjustment gear 61 and the operation gear 62 is stabilized, the adjustment of the amount of seeds fed through the feeding hole 11 can be stably performed.

  A mechanism for changing the capacity of the feeding hole 11 (the screw feeding mechanism 40, the adjustment gear 61, the operation gear 62, the detent mechanism 43, etc.) is provided in each of the six feeding cases 21 provided in the direct seeding device 3. ing. As shown in FIG. 2, the operation gears 62 of the adjacent feeding cases 21 are connected by a connecting shaft 63. As shown in FIG. 2, an operation handle 64 is provided at the end of the connecting shaft 63. By rotating the operation handle 64, the operation gears 62 of the six feeding cases 21 can be rotated all at once. With the above configuration, the capacity of the feeding hole 11 of the feeding roll 28 can be changed simultaneously by the six feeding cases 21.

  As described above, the direct sowing apparatus 3 of the present embodiment includes the hopper 20 that accommodates seeds, and the feeding case 21 that is disposed below the hopper 20 and supplied with the seeds. In the feeding case 21, a feeding roll 28 for feeding seeds by a predetermined amount is provided. The feeding case 21 includes a driven gear support (a left side wall 33 of the feeding case 21) that supports a driven gear 30 that rotates integrally with the feeding roll 28, and a driving gear support that supports a driving gear 31 that meshes with the driven gear 30. Part 49.

  Thus, by supporting both the driven gear 30 and the drive gear 31 on the feeding case 21, the distance between the cores of the driven gear 30 and the driving gear 31 is determined only by the accuracy of the feeding case 21. Thereby, the dispersion | variation between the cores of the driven gear 30 and the drive gear 31 can be suppressed, and the meshing precision of the gears 30 and 31 can be improved.

  Further, as described above, in the direct seeding device 3 of the present embodiment, the driven gear support portion (the left side wall 33 of the feeding case 21) and the drive gear support portion 49 are integrally formed.

  Thus, by integrally forming the driven gear support portion and the drive gear support portion 49, the positions of the driven gear support portion and the drive gear support portion 49 are determined only by the forming accuracy of the feeding case. Therefore, the center of the driven gear 30 and the drive gear 31 is not affected by the assembly accuracy. Thereby, the meshing accuracy of the gears 30 and 31 can be further improved.

  Moreover, as explained above, the direct seeding device 3 of the present embodiment includes a plurality of feeding cases 21. Each feeding case 21 includes a drive transmission shaft 32 that is arranged so that the axis line coincides with the drive gear 31 and transmits a driving force to the drive gear 31. The drive transmission shaft 32 is provided independently for each feeding case 21. Each feeding case 21 includes a transmission shaft support portion 48 that supports the drive transmission shaft 32. The direct seeding device 3 includes a connecting shaft 68 that connects the drive transmission shafts 32 of the adjacent feeding cases 21.

  Thus, since the drive transmission shaft 32 is provided independently for each feeding case 21, the feeding case 21 and the drive transmission shaft 32 can be handled together as one unit. Then, the driving force can be transmitted to all the drive transmission shafts 32 by connecting the drive transmission shafts 32 of the adjacent feeding cases 21 by the connection shaft 68.

  Further, as described above, the direct seeding device 3 of the present embodiment has the clutch mechanism 50 between the drive transmission shaft 32 and the drive gear 31 in each feeding case 21.

  That is, in the present embodiment, the drive transmission shaft 32 is individually provided for each feeding case 21. If the clutch mechanism 50 is provided for each feeding case 21 in addition to this, the driving transmission shaft 32 and the clutch mechanism 50 are provided. The feeding case 21 can be collectively handled as one unit.

  Moreover, as demonstrated above, in the direct sowing apparatus 3 of this embodiment, the supply roll 28 has the screw feed mechanism 40 which can adjust the quantity which pays out a seed. The feeding case 21 includes an adjustment gear 61 fixed to the screw shaft 41 of the screw feeding mechanism 40 and an operation gear support portion 73 that supports an operation gear 62 that can mesh with the adjustment gear 61.

  As described above, by supporting the operation gear 62 on the feeding case 21, the distance between the operation gear 62 and the adjustment gear 61 is determined only by the accuracy of the feeding case 21. Thereby, the variation between the centers of the adjustment gear 61 and the operation gear 62 can be suppressed, and the meshing accuracy of the adjustment gear 61 and the operation gear 62 can be improved.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, the driven gear support portion (the left side wall of the feeding case 21) and the drive gear support portion 49 are integrally formed, but the present invention is not necessarily limited thereto. For example, the drive gear support 49 may be configured as a separate member from the feeding case 21 and the driving gear support 49 may be fixed to the feeding case 21.

  In the above-described embodiment, the feeding roll 28 is a slide roll type that can change the capacity of the feeding hole 11. .

  In the above embodiment, a notch (D cut) is formed at the ends of the drive transmission shaft 32 and the connection shaft 68, and the connection member 69 is fitted to this portion, whereby the drive transmission shaft 32 and the connection shaft 68 are fitted. It is set as the structure connected so that relative rotation is impossible. However, the connection structure of the drive transmission shaft 32 and the connection shaft 68 is not limited to this. For example, a keyway may be formed in the end portions of the drive transmission shaft 32 and the connecting shaft 68 instead of the notch, and the connecting member 69 may be fitted in this portion. Further, for example, the drive transmission shaft 32 and the connecting shaft 68 may be connected by spline fitting (in this case, the connecting member 69 can be omitted). In addition, as a configuration for connecting the drive transmission shaft 32 and the connecting shaft 68, a known appropriate connecting structure can be adopted. However, the adjacent drive transmission shafts 32 can be directly connected by, for example, the connecting member 69. In this case, the connecting shaft 68 can be omitted.

  In the said embodiment, it has the structure by which the direct sowing apparatus 3 (granular material dispersion | spreading apparatus) is arrange | positioned at the back of the vehicle body 2. FIG. However, the arrangement of the granular material spraying device is not necessarily limited thereto, and for example, the granular material spraying device may be disposed in the center of the vehicle body or in front of the vehicle body.

  The configuration of the present invention is not limited to the direct seeding device, and can be widely used in devices for spraying granular materials (eg, granular fertilizer).

1 Scattering work vehicle 2 Car body 3 Direct seeding device (granular material spraying device)
20 Hopper 21 Feeding Case 28 Feeding Roll 30 Driven Gear 31 Drive Gear 32 Drive Transmission Shaft 33 Left Side Wall (Driven Gear Support)
49 Drive gear support

Claims (4)

A hopper for accommodating the granular material;
A feeding case disposed below the hopper and supplied with the granular material;
With
In the feeding case, a feeding roll for feeding the granular material by a predetermined amount is provided,
The feeding case is
A driven gear support that supports a driven gear that rotates integrally with the feeding roll;
A drive gear support that supports a drive gear meshing with the driven gear;
Have
The driven gear support part is provided with an insertion hole,
An outer peripheral surface formed integrally with the driven gear is rotatably supported by an inner peripheral surface of the insertion hole of the driven gear support portion,
The drive gear support part is provided with an insertion hole,
An outer peripheral surface formed integrally with the drive gear is rotatably supported by an inner peripheral surface of the insertion hole of the drive gear support portion ,
A plurality of the feeding cases are provided,
Each feeding case is provided with a drive transmission shaft that is arranged with the axis line aligned with the drive gear, and transmits a driving force to the drive gear,
The drive transmission shaft is provided independently for each feeding case,
A connecting portion that connects the drive transmission shafts of adjacent feeding cases;
In each payout case, a clutch mechanism that connects and disconnects the power of the drive transmission shaft to the drive gear between the drive transmission shaft and the drive gear,
The clutch mechanism includes a clutch member slidable in the axial direction of the drive transmission shaft,
The granular member characterized in that the rotation of the driven gear stops when the clutch member slides in the axial direction of the drive transmission shaft and the power from the drive transmission shaft to the drive gear is cut off. Spraying equipment. The granular material spraying device according to claim 1,
The granular material spraying device, wherein the driven gear support portion and the drive gear support portion are integrally formed. The granular material spraying device according to claim 1 or 2 ,
The feeding roll has an adjustment mechanism capable of adjusting an amount of feeding out the granular material,
The feeding case is
An adjustment gear fixed to the adjustment shaft of the adjustment mechanism;
An operation gear support that supports an operation gear that can mesh with the adjustment gear;
A granular material spraying device comprising: The granular material spraying device according to any one of claims 1 to 3 ,
A vehicle body that can travel with the granular material spraying device mounted thereon,
A dispersion work vehicle characterized by comprising:

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