JP5308122B2 - Fertilizer transmission gearbox - Google Patents

Description

  The present invention relates to a technique of a transmission device of a fertilizer that shifts driving force.

  2. Description of the Related Art Conventionally, a fertilizer applicator that is mounted behind a working machine such as a riding rice transplanter and performs fertilization work is known. The fertilizer applicator includes a fertilizer hopper, a feeding portion located below the fertilizer hopper, and a fertilizer transport unit connected to the feed unit, and is configured to apply fertilizer to the field from the fertilizer transport unit.

For example, as shown in Patent Document 1, power is transmitted from an output shaft of a mission case to a fertilizer applicator via a transmission (metering mechanism), and a metering mechanism that adjusts the fertilizer feed amount is a fertilizer applicator. It is arranged in front and below the vehicle body cover, and a bar stop lever is attached separately from the transmission. Further, a technique is known in which a fertilizer feeding device for two left and right strips can be selectively driven by a unit clutch lever located in front of the fertilizer applicator.
Japanese Patent No. 4072003

  In a conventional fertilizer transmission, the metering operation means is attached to the transmission itself, and the means for transmitting and stopping the driving force to the fertilizer feeding portion corresponding to each strip may be attached separately from the transmission. is there.

  In other words, as described above, only the metering operation means is provided in the transmission of the fertilizer applicator, and the operation means such as the power disconnection clutch is provided in a different location from the transmission, and various operations of the fertilizer applicator are performed. Since the means are not integrated, there is a problem that it is difficult to operate.

  SUMMARY OF THE INVENTION In view of the above situation, the present invention aims to provide a transmission device for a fertilizer applicator with good operability by consolidating functions for performing a shift operation (metering operation) of driving force and a full-strike operation in a transmission device. To do.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, according to the first aspect of the present invention, the friction disk transmission is provided in the middle of the power transmission path for transmitting power from the traveling mission case of the work machine to the fertilizer having a plurality of feeding parts arranged on the rear part of the work machine. The friction disk transmission is configured such that the drive disk provided on the input shaft and the output shaft are slidable in the axial direction so that the outer peripheral surface is in sliding contact with the drive disk. An arranged driven disk, an operating shaft for moving the driven disk in a radial direction of the drive disk and shifting the drive disk, and sliding or driving the drive disk on the input shaft to separate or bias the driven disk. a power disengaging clutch to abut Te, and a power on-off means provided at the distal end of the output shaft, with protruding forward is provided a metering knob to the tip of the operation shaft, the operation of the power disengaging clutch That is the operating member of the clutch lever and the power on-off means that projects into the metering knob in the same direction.

According to a second aspect of the present invention, the operation shaft and the clutch lever are arranged on the outer side of the drive disk and on the left and right sides.

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

According to the first aspect, the speed change operation, that is, the metering operation can be easily performed by rotating the operation shaft. By operating the power on / off means to release power transmission, the transmission can be easily detached from the fertilizer applicator, and maintenance and assembly can be facilitated.

In addition , by operating the power connection / disconnection clutch, power transmission to a plurality of feeding parts can be connected / disconnected at a time, so-called all-strand stopping is possible, and all-strand stopping means can be provided integrally with the transmission. And cost reduction can be achieved.

In addition , the operation member is protruded in the same direction and can be operated from the same direction, so that the operability can be improved.

According to the second aspect of the present invention, dust or lubricant generated from the rotating portion of the operation shaft or the clutch lever does not fall on the drive disk, and the speed of the transmission is reliably reduced without adversely affecting the friction between the drive disk and the driven disk. Can be operated.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  Next, embodiments of the invention will be described. 1 is a side view showing an overall configuration of a riding rice transplanter equipped with a fertilizer applicator according to one embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a side sectional view showing the periphery of the fertilizer applicator, 4 is a rear perspective view showing the periphery of the fertilizer applicator, FIG. 5 is a side sectional view showing the friction disk transmission, and FIG. 6 is a plan sectional view showing the periphery of the auxiliary transmission unit.

  Below, the whole structure of the fertilizer applicator 40 provided with the transmission which concerns on this invention is demonstrated using FIG. 1, FIG. In the following description, the direction of the arrow A in FIGS. 1 and 2 is defined as “front” for convenience.

  The working machine in the present embodiment will be described as a riding rice transplanter 100. However, although the working machine is the passenger rice transplanter 100 for explanation, it may be a working machine such as a tractor. Moreover, although the riding rice transplanter 100 is for Shijo, it is not limited.

  In the riding rice transplanter 100 according to the present embodiment, the planting unit 4 is disposed at the rear of the traveling unit 1 via the lifting link mechanism 27. The traveling unit 1 has an engine 2 mounted on the front upper part of the body frame 3, a front wheel 6 is supported through a front axle case (not shown) at the front lower part, and a rear wheel through a rear axle case 7 at the rear lower part. 8 is supported. The engine 2 is covered with a bonnet 9.

  A steering handle 14 is disposed on the dashboard 5 provided at the rear portion of the bonnet 9, and the upper surface of the vehicle body frame 3 at the left and right sides of the bonnet 9 and the rear portion of the bonnet 9 is covered with a vehicle body cover 12. . A driver's seat 13 is disposed behind the steering handle 14, and the operator places his / her feet on the left and right sides of the hood 9, the front of the driver's seat 13, the left and right sides of the driver's seat 13, and the rear of the driver's seat 13. It is said that.

  On the side of the driver's seat 13, a travel speed change lever 30, an auxiliary speed change lever 31 for raising and lowering the planting part 4 and a work travel speed change, a planting sensitivity adjustment lever, and the like are disposed. On this step, a main clutch pedal 32 and left and right brake pedals are disposed, and a fertilizer applicator 40 is disposed behind the driver's seat 13.

  The planting part 4 is mainly composed of a seedling stage 16, a planting claw 17, a float 23, and the like. The seedling stage 16 is disposed in a front and rear and low position, and a lower part thereof is supported by the lower guide rail 18 and an upper part of the front surface is supported by the upper guide rail 19 so as to be slidable in the left and right directions. The lower guide rail 18 and the upper guide rail 19 are supported by a planting center case 20 via a frame or the like. A planting case 21 protrudes rearward from the planting center case 20 via a connecting pipe, and a rotary case 22 that rotates in one direction is provided at the rear of the planting case 21. A pair of planting claws 17 are provided on both sides of the rotary case 22. On the lower surface of the planting case 21, a float 23 that slides on the mud surface of the farm is disposed.

  A lifting link mechanism 27 is connected to the front portion of the planting center case 20 via a rolling fulcrum shaft (not shown). Specifically, the lifting link mechanism 27 is connected to the top link 25, the lower link 26, and the like. It is comprised and the planting part 4 is raised / lowered by the raising / lowering cylinder 28 arrange | positioned under the driver's seat 13 below.

  In this way, the riding rice transplanter 100 reciprocates (slids) the seedling table 16 left and right by the lateral feed mechanism as it travels forward, and drives the planting claws 17 in synchronization with this reciprocating motion. Planting work is performed continuously while cutting out one seedling.

  Next, the configuration of the fertilizer applicator 40 will be described. The fertilizer applicator 40 is disposed on the traveling unit 1 between the driver's seat 13 and the planting unit 4 in the left-right direction of the machine body. That is, the fertilizer applicator 40 is supported on the rear portion of the traveling unit 1 by the fertilizer applicator frame 51. First, the fertilizer applicator frame 51 that supports the fertilizer applicator 40 will be described with reference to FIGS. 3 and 4.

  A pair of left and right column frames 10 are erected on both sides of the rear portion of the body frame 3, and a cross beam frame (not shown) is horizontally disposed on the column frame 10. A fertilizer machine frame 51 is fixed on the support frame 10 and the cross beam frame.

  On the other hand, the fertilizer machine frame 51 includes connection frames 52 and 52 arranged on a pair of left and right sides, support plates 53 and 53 provided on the outer side of the connection frame 52, and a support plate 53 and 53. Between the horizontal frames 54 and 54 that are horizontally disposed on the front and rear upper side in parallel with each other, between the horizontal frames 55 and 55 that are horizontally disposed on the front and lower sides, and between the left and right support plates 53 and 53, It is composed of a plurality of auxiliary support plates 56, 56, 56, 56 that are arranged in parallel with the support plates 53, 53 at a position that does not interfere with the fertilizer application unit 41 that will be described later. ing.

  The connecting frame 52 is formed by bending a plate in a substantially U shape when viewed from the back, the support plate 53 is formed in a trapezoidal shape with a short bottom when viewed from the side, and the upper horizontal frames 54 and 54 have side cross sections. The lower horizontal frames 55 and 55 are formed of pipes having a circular cross-sectional side view, and the auxiliary support plate 56 is formed in substantially the same shape as the support plate 53.

  Further, the fertilizer machine frame 51 has the horizontal frame 55 and the connecting frame 52 fixed by welding or the like, and is assembled in a frame shape to increase the rigidity.

  The connection between the fertilizer application frame 51 and the fertilizer application 40 is as follows. As shown in FIG. 4, a rotation support shaft 57 extending in the front-rear direction is disposed on the upper outer surface of the left and right support plates 53. On the other hand, pivot brackets 58 and 58 are fixed on the left and right side surfaces of the left and right fertilizer hoppers 42 and 42, which will be described later, and are extended downward. A pivot hole is opened below the pivot brackets 58 and 58. The pivot support shaft 57 is pivotally supported. Further, the lower portion of the feeding portion 43 of the fertilizer applicator 40 is configured to be fitted and fixed to the upper portion of the connection pipe 46, and the connection pipe 46 is installed between the left and right support plates 53 and 53 and the auxiliary support plate 56. Are supported by the blower pipe 47 and the horizontal frame 55.

  As shown in FIGS. 3 and 4, the fertilizer applicator 40 mainly includes a fertilizer hopper 42, a feeding part 43 provided continuously below the fertilizer hopper 42, and a blower part 45 provided horizontally below the machine body in the left-right direction. The fertilizer transfer unit 44 is disposed behind the blower unit 45.

  Here, for the sake of explanation, the part composed of the fertilizer hopper 42 and the feeding part 43 is referred to as an upper fertilizer unit 41 a, and the part composed of the upper fertilizer unit 41 a and the fertilizer transport part 44 is referred to as a fertilizer unit 41. That is, the fertilizer application units 41, 41, 41, 41 are arranged side by side in the left-right direction of the machine body.

  The fertilizer hopper 42 includes a storage portion 42a that stores the fertilizer, and a lid 42b that is detachably disposed on the upper portion of the storage portion 42a for two strips. Further, an outlet 42c is formed only on the outer surface of the body of the accommodating portion 42a, and the outlet 42c is blocked by a plug 42d when the fertilizer is accommodated so that the fertilizer does not leak to the outside. The lower half of the accommodating portion 42a has a funnel shape, and an opening is provided at the lower end portion so as to communicate with the upper portion of the feeding portion 43.

  That is, the fertilizer stored in the storage portion 42a of the fertilizer hopper 42 is configured to fall to the feeding portion 43 below the opening provided in the lower end portion of the storage portion 42a.

  And the delivery part 43 delivers the fertilizer stored in the said fertilizer hopper 42 to the fertilization conveyance part 44 mentioned later by predetermined amount, and as shown in FIG. 3, the upper accommodating part 43a which comprises an upper part, The lower housing portion 43b that forms the lower portion, the feeding device 60 that feeds the fertilizer, and the like are formed.

  The upper accommodating portion 43 a is configured to receive the fertilizer dropped from the fertilizer hopper 42 and to flow the fertilizer down to the lower accommodating portion 43 b via the feeding device 60. The upper accommodating portion 43a is provided with an inlet portion 43c on the upper surface, and extends obliquely rearward as it goes downward. An outlet 43d is provided on the lower surface, and is connected to the upper front portion of the funnel-shaped lower accommodating portion 43b. In addition, a gear case 68 that accommodates the feeding shaft 66 and the like is formed integrally with the upper accommodation portion 43a behind the upper accommodation portion 43a.

  A funnel-shaped lower accommodating portion 43b is disposed below the upper accommodating portion 43a, and a feeding device 60 is provided between the upper accommodating portion 43a and the lower accommodating portion 43b. The feeding device 60 mainly includes a fixed disk 61, a porous disk 62, a notch disk 63, a rotating body 64, a feeding shaft 66, and the like.

  In the lower housing space of the upper housing part 43a, a fixed disk 61, a porous disk 62, and a notch disk 63 are arranged in this order from the top, and the fixed disk 61 has an outlet of the upper housing part 43a. A communication hole is formed so as to substantially coincide with the position of the portion 43d. In the porous disk 62, a large number of through holes located on the same radius as the communication hole are formed at predetermined intervals on a concentric circle. Further, a notch disc 63 is disposed below the perforated disc 62, and the notch disc 63 is provided with a notch (or hole) at a position shifted 180 degrees from the communication hole. It has been. A rotating body 64 made of a plate is provided vertically below the diameter direction of the cutout disk 63.

  A feeding shaft 66 is disposed so as to penetrate substantially the center of the fixed disk 61, the porous disk 62, the cutout disk 63, and the rotating body 64, and is rotatably supported by the gear case 68. However, the porous disk 62 and the rotating body 64 are fixed to the feeding shaft 66, and the fixed disk 61 and the cutout disk 63 are non-rotatably fitted in the lower housing space of the upper housing portion 43a. Thus, the fertilizer in the fertilizer hopper 42 enters the through hole from the outlet portion 43d of the upper accommodating portion 43a through the communication hole, and the perforated circular plate 62 is rotated and conveyed rearward by the rotation of the feeding shaft 66. The disk 63 is configured to drop downward from the cutout of the disk 63 and to be fed out by a predetermined amount.

  On the other hand, a driven bevel gear 72 for transmitting a driving force from a power transmission mechanism, which will be described later, is fixed to the upper end of the feeding shaft 66, and an inner peripheral surface of the lower housing portion 43b and a connecting tube, which will be described later, are provided at the lower end. One end of a scraper 67 extending so as to abut is fixed to the inner peripheral surface of the inlet 46a of 46.

  The scraper 67 is formed by bending a wire or the like so as to be substantially U-shaped, and slidably contacts the inner surfaces of the lower accommodating portion 43b and the inlet portion 46a of the connecting pipe 46 while rotating with the rotation of the feeding shaft 66. It is comprised so that the fertilizer adhering to the inside of the entrance part 46a of the lower accommodating part 43b and the connecting pipe 46 may be removed.

  Further, a gear case 68 that accommodates the feeding shaft 66, the driven bevel gear 72, the drive bevel gear 73, a part of the suspending clutch mechanism 111, and the like is formed above the lower accommodating portion 43b at the rear portion of the upper accommodating portion 43a. A lateral transmission shaft 71, which will be described later, passes through the gear case 68 in the left-right direction. On the left and right sides of the gear case 68, bearing portions (not shown) that support the lateral transmission shaft 71 are formed. On the other hand, a drive bevel gear 73 is arranged on the lateral transmission shaft 71 so as to mesh with the driven bevel gear 72 at the upper end of the feeding shaft 66.

  On the other hand, as shown in FIG.1 and FIG.3, the fertilization conveyance part 44 guides the fertilizer fed from the said feeding part 43 to the side part (near fertilization part) of a planting strip, and mainly, the connecting pipe 46, It is comprised from the conveyance hose 48, the groove production device 49, etc.

  That is, one end of a bendable conveyance hose 48 such as soft synthetic resin is fitted to the rear end of the connection pipe 46, and a groove forming device 49 is provided at the other end of the conveyance hose 48. .

  Moreover, as shown in FIG.3 and FIG.4, the ventilation part 45 is a means to send the fertilizer delivered from the said connection pipe 46 by conveyance wind, and is mainly comprised from the ventilation pipe 47, the air blower 47b, etc. .

  In other words, the front end of the connection pipe 46 is connected to the blower pipe 47 in a direction perpendicular to the connection pipe 46 via a fitting pipe 47a made of an elastic body such as rubber. It is installed. A blower 47b is connected to the left end of the blower pipe 47, and the right end of the blower pipe 47 is closed by a lid or the like so as to be opened and closed.

  Therefore, the conveying wind is sent from the blower 47b to the blowing pipe 47 and the connecting pipe 46. Further, the fertilizer in the connecting pipe 46 is conveyed to the conveying hose 48 by the conveying wind, and is planted from the groove producing device 49. It is configured to be discharged to the side of the appendix.

  Next, a power transmission mechanism that transmits power from the traveling mission case to the feeding portion 43 will be described with reference to FIGS. 1, 5, and 6. The power transmission mechanism is configured by a transmission shaft 89, a friction disk transmission 81, an auxiliary transmission 99, a stop clutch mechanism 111, and the like. The transmission shaft 89 is disposed between the PTO shaft protruding from the traveling mission case and the input shaft 82 of the friction disk transmission 81.

  The friction disk transmission 81 is disposed in the middle of the power transmission path for transmitting power to the fertilizer applicator 40. In this embodiment, the right and left fertilizer hoppers 42 and fertilizer hoppers 42 on the right rear side of the driver's seat 13 are used. Is disposed between the lower part and the lower part.

  First, the speed change case 90 that houses the speed change mechanism of the friction disk transmission 81 will be described with reference to FIG. The transmission case 90 is mainly configured by an upper case 91 and a lower case 92 that can be vertically divided.

  The lower case 92 is formed in a hemispherical shape with the lower part serving as a receiving part, the upper part being opened, and a flange part being formed on the outer periphery of the open part. An opening is provided at a substantially lower center of the housing portion, and a cylindrical boss portion 92a is formed downward from the opening portion. The input shaft 82 is rotated in the vertical direction through a bearing 82a and a seal member on the boss portion 92a. Supports freely.

  The upper case 91 is formed such that the housing part is eccentric to the front side, the lower part of the housing part is opened, and a flange part is formed on the outer periphery of the open part, and the flange part is fitted with the flange part of the lower case 92 It is formed so that it can be done. A boss portion is formed at substantially the center of the front wall and the rear wall of the housing portion so that the output shaft 85 laid horizontally in the front-rear horizontal direction can be rotatably supported via bearings 85b and 85b. Thus, power is transmitted from the upper part of the input shaft 82 arranged in the vertical direction to the front part of the output shaft 85 arranged in the front-rear direction, and the transmission direction is changed in the right-angle direction, and the speed is changed by the friction disk transmission 81. Later, power is transmitted to the rear.

  Then, the lower case portion of the upper case 91 and the upper flange portion of the lower case 92 are fitted and fixed with bolts or the like, so that a transmission case 90 that can be divided vertically is formed. The rear portion of the transmission case 90 is fixed to the front lateral frame 54 by a stay (not shown), and the friction disk transmission 81 is supported and fixed to the fertilizer machine frame 51.

  The input shaft 82 is vertically penetrated and supported at the center of the lower case 92, and the lower end of the input shaft 82 protrudes downward from the lower case 92 and is connected to the PTO shaft protruding from the traveling mission case via a joint or the like. Has been. In the lower case 92, a power connection / disconnection clutch 95 for connecting / disconnecting power transmission to the feeding portion 43 at once and a drive disk 83 constituting the friction disk transmission 81 are housed. That is, a drive disk 83 mounted in a horizontal direction is fitted to the upper portion of the input shaft 82 in the lower case 92 so as to be slidable in the vertical (axial) direction and not relatively rotatable. A power connection / disconnection clutch 95 is formed between the inner surface of the case 92.

  In the lower case 92, a connecting member for connecting the drive disk 83 and a clutch lever 98, which will be described later, is housed. The connecting member includes a slider 82d, a clutch arm 97a, a clutch shaft 97, and the like.

  A central portion of the lower surface of the drive disk 83 is connected to a slider 82d via a bearing 82b. That is, the drive disk 83 and the slider 82d are configured to be able to slide on the input shaft 82 integrally. A clutch spring 82c is fitted on the input shaft 82 between the slider 82d and the inner surface of the lower case 92, and is urged upward by the clutch spring 82c so that the upper surface of the drive disk 83 is pressed against the outer peripheral surface of the driven disk 84. Has been.

  The slider 82d is engaged with the tip of the clutch arm 97a. The base of the clutch arm 97 a is fixed to one end of the clutch shaft 97. The clutch shaft 97 is rotatably supported by the lower case 92 in the left-right direction. The other end of the clutch shaft 97 protrudes outward from the lower case 92 and a base (rear end) of the clutch lever 98 is fixed. Yes. That is, the clutch lever 98 protrudes to the rear side of the driver's seat 13.

  The drive disk 83 is formed in a disk shape and is disposed horizontally with the upper surface as a friction surface. The outer peripheral surface of the disk-shaped driven disk 84 is vertically arranged on the upper surface on one side (front side) of the center of the drive disk 83 so as to be slidable. That is, the driven disk 84 is configured to be movable only in the radial direction from the center of the drive disk 83 (not movable in the diameter direction), transmitted only in one rotation, and configured not to transmit rotation in the opposite direction. The feeding device of the machine 40 is reversely rotated so as not to break.

  With this configuration, when the front end of the clutch lever 98 is rotated downward, the clutch shaft 97 is rotated, and the slider 82d is slid downward via the clutch arm 97a. By doing so, the drive disk 83 is pushed downward so as to resist the urging force of the clutch spring 82 c, and the power is cut away from the driven disk 84. In the case of connection, the reverse is true, and the front end of the clutch lever 98 is rotated upward, and the driving disk 83 and the driven disk 84 are brought into contact with each other by the urging force of the clutch spring 82c. Further, in order to keep the front end of the clutch lever 98 downward, a locking portion (not shown) is disposed on the front right wall of the lower case 92.

  In addition, as described above, since the upper surface of the drive disk 83 is disposed so as to be in pressure contact with the outer peripheral surface of the driven disk 84, the fertilizer is clogged in the fertilizer machine for some reason even without a separate safety device. When the transmission torque to the fertilizer applicator 40 exceeds the set value, the output shaft 85 is locked and the drive disk 83 slips, so that the power is not transmitted to the fertilizer applicator 40 and serves as a safety device. ing.

  The metering means 94 for adjusting the rotational speed of the driven disk 84 and adjusting the fertilizer feed amount will be described below.

  In the upper case 91, a sliding transmission portion of the driven disk 84 constituting the driven disk 84 and the metering means 94 is accommodated. The sliding transmission portion includes an outer fitting body 85a, a bearing 85c, a slider 85d, a connecting body 88c, a nut 88b, and an operation shaft 88. An output shaft 85 is rotatably supported by the upper case 91 in the front-rear direction, and a driven disk 84 is relatively non-rotatable through a cylindrical outer fitting body 85a at a substantially front-rear center of the output shaft 85, and It is supported so that it can slide back and forth. Specifically, splines are formed on the outer periphery of the output shaft 85, and the outer fitting body 85a is spline-fitted on the output shaft 85 so as to be slidable in the axial direction.

  A slider 85d is externally provided via a bearing 85c at the front portion of the outer fitting body 85a fixed to the center of the driven disk 84. On the other hand, on the left side of the front and rear side walls of the upper case 91, an operation shaft 88 is horizontally mounted in parallel with the output shaft 85 in the front-rear direction. The operation shaft 88 is disposed so as to penetrate the front side wall and protrude to the front outside of the upper case 91. A metering knob 88a is fixed to the front end (front end) of the operation shaft 88, and a screw thread is formed on the outer periphery of the operation shaft 88 in the upper case 91. The screw thread is engaged with the screw thread. A nut 88b is arranged as described above. The nut 88b and the slider 85d are connected by a connecting body 88c.

  With the above configuration, when the metering knob 88a is rotated forward (or reversely rotated), the operation shaft 88 is rotated and the nut 88b is moved forward (or rearward). By the movement of the nut 88b, the driven disk 84 moves forward (or rearward) via the coupling body 88c, the slider 85d, and the outer fitting body 85a, and moves to the outer peripheral side (or the center side) of the drive disk 83. By this movement, the rotational speed of the driven disk 84 is increased (or decreased), and the fertilizer feed rate per unit time is increased (or decreased).

  The driven disk 84 is configured to be slidable from the center of the drive disk 83 to the front outer peripheral edge. That is, the rotation of the operating shaft 88 is restricted so that the driven disk 84 can slide only in the radial direction on the drive disk 83. In the present embodiment, the nut 88b or the connecting body 88c is configured to come into contact with the inner surface on the front side of the upper case 91 when the fertilization feed amount of the metering means 94 is maximized. When the fertilizer application amount is minimized, the rear end of the outer fitting body 85a is configured to abut on the rear inner surface of the upper case 91. In this way, the radial movement range of the driven disk 84 is restricted so that it can rotate in only one direction. Further, the operation shaft 88, the power on / off shaft 87, and the clutch lever 98 are arranged substantially in parallel and protrude to the same side (forward in this embodiment) so that they can be easily operated from the front.

  The rear end of the output shaft 85 protrudes rearward from the rear wall of the upper case 91 and is connected to the power on / off means 93. The power on / off means 93 is a means for releasing the power transmission unit when the upper fertilizer application unit 41a is rotated upward to discharge the fertilizer remaining in the fertilizer hopper 42 at the end of the work. The configuration of the power on / off means 93 will be described below.

  At the rear end of the output shaft 85, a bottomed cylindrical fitting portion 86 is externally fitted on the output shaft 85 so as not to be relatively rotatable and slidable. A clutch pawl is formed at the rear end of the fitting portion 86, and can be engaged with a clutch pawl formed at the front end of an auxiliary output shaft 101 described later. Further, an engaging groove 86a is formed in the entire circumference of the fitting portion 86, and an engaging body 87a provided at the tip of the power on / off shaft 87 is engaged with the engaging groove.

  The power on / off shaft 87 is slidably supported by support members 91 a and 91 a erected on the upper case 91, and is disposed in parallel to the output shaft 85. The front end of the power on / off shaft 87 is a grip portion that is bent into a substantially U shape in plan view and is easily gripped, and an engagement body 87a that is formed in an inverted L shape in side view is provided at the rear end. Further, a spring 87b is interposed between the engagement body 87a and the right rear wall of the upper case 91, and the engagement portion 86 is urged rearward by the spring 87b so that the clutch pawl is engaged. Is being energized.

  In such a configuration, when the power on / off shaft 87 is slid forward, the engaging body 87a resists the urging force of the spring 87b, and the fitting portion 86 is slid forward of the output shaft 85. The engagement of the auxiliary output shaft 101 with the clutch pawl is released. On the contrary, when the power on / off shaft 87 is opened, the urging force of the spring 87b acts, and the fitting portion 86 and the clutch pawl of the auxiliary output shaft 101 are engaged.

  Further, an auxiliary transmission portion 99 is provided between the friction disk transmission 81 and the lateral transmission shaft 71.

  As shown in FIG. 4, the auxiliary transmission unit 99 is disposed at a lower portion of the fertilizer unit 41 disposed on the right side of the machine body, and is disposed on a lateral transmission shaft 71 between the feeding unit 43 and the feeding unit 43. Yes.

  As shown in FIG. 6, the auxiliary transmission portion 99 fixes the auxiliary transmission portion case 96 to the feeding portion 43, opens a through hole in the central portion in a side view of the auxiliary transmission portion case 96, and a bearing 71 a is provided in the through hole. -The horizontal transmission shaft 71 is rotatably supported via 71a. The lateral transmission shaft 71 is arranged in a direction perpendicular to an auxiliary output shaft 101 described later. A bevel gear 71 b is fixed on the lateral transmission shaft 71 in the auxiliary transmission portion case 96. Further, a through hole is opened in the front surface of the auxiliary transmission portion case 96, and the auxiliary output shaft 101 is rotatably supported through a bearing. A clutch pawl is provided at the front end of the auxiliary output shaft 101, and the friction circle It is configured to be able to mesh with a clutch pawl of a fitting portion 86 provided at the rear end of the output shaft 85 of the plate transmission 81. A rear end of the auxiliary output shaft 101 is inserted into the auxiliary transmission portion case 96 and a bevel gear 102 is fixed, and the bevel gear 102 is meshed with the bevel gear 71b.

  As shown in FIG. 3 or FIG. 4, the lateral transmission shaft 71 penetrates the feeding portion 43 in the horizontal direction, and the feeding clutch 43, the driving bevel gear 73 and the driven bevel gear are inserted into each feeding portion 43 from the lateral transmission shaft 71. Power is transmitted to the feeding shaft 66 through 72. The said hooking clutch mechanism 111 is connected with the hooking clutch lever which is not shown in figure, and is set as the structure which can selectively drive each fertilizer application unit 41. FIG.

  With the configuration as described above, the power from the traveling transmission case is transmitted to the drive disk 83 of the friction disk transmission 81 via the transmission shaft 89 and is brought into contact with the drive disk 83 and the driven disk 84. The output rotation is changed accordingly. The driving force after the shift is transmitted from the output shaft 85 to the lateral transmission shaft 71 via the auxiliary transmission portion 99, and the feed shaft 66 is driven from the lateral transmission shaft 71 via the drive bevel gear 73 and the driven bevel gear 72. Due to the rotation of the feeding shaft 66, the fertilizer in the fertilizer hopper 42 falls to the connecting pipe 46 by a predetermined feeding amount. Then, the fallen fertilizer is conveyed by air through the conveying hose 48 to the groove producing device 49.

  As described above, friction is generated in the middle of the power transmission path for transmitting power from the traveling mission case of the riding rice transplanter 100, which is a working machine, to the fertilizer applicator 40 having a plurality of feeding portions 43 arranged on the rear part of the riding rice transplanter 100. A disc-type transmission 81 is provided. The friction disk transmission 81 is arranged such that the drive disk 83 provided on the input shaft 82 and the output shaft 85 are slidable in the axial direction and the outer peripheral surface is in sliding contact with the drive disk 83. The driven disk 84, the operating shaft 88 for shifting the driven disk 84 in the radial direction of the drive disk 83, and the drive disk 83 being slid on the input shaft 82 to move relative to the driven disk 84. A power connection / disconnection clutch 95 that is separated or biased to contact, and a power on / off means 93 provided at the tip of the output shaft 85 are provided.

Therefore, a speed change operation, that is, a metering operation can be easily performed by turning the operation shaft 88. By operating the power on / off means 93 to release power transmission, the friction disk transmission 81 can be easily detached from the fertilizer applicator 40, and maintenance and assembly can be facilitated. By operating the power connection / disconnection clutch 95, the power transmission to the plurality of feeding portions 43 can be connected / disconnected at a time, so-called all-strike stopping is possible, and all-strand stopping means can be provided integrally with the transmission. And cost reduction can be achieved.

  Further, a metering knob 88a is provided at the tip of the operation shaft 88 to protrude forward, and a clutch lever 98 for operating the power connection / disconnection clutch 95 and an operation member of the power on / off means 93 are connected to the metering knob 88a. By projecting in the same direction, the operation member is projected in the same direction and can be operated from the same direction, so that the operability can be improved.

  Further, the operation shaft 88 and the clutch lever 98 are disposed on the left and right sides of the drive disk 83, so that dust and lubricant generated from the rotation portion of the operation shaft 88 and the clutch lever 98 are disposed. Or the like does not fall on the drive disk 83, and does not adversely affect the friction between the drive disk 83 and the driven disk 84, so that the speed change operation can be performed reliably.

The side view which showed the whole structure of the riding rice transplanter carrying the fertilizer applicator which concerns on one Example of this invention. FIG. The sectional side view which showed the fertilizer periphery. The rear perspective view which showed the fertilizer periphery. The sectional side view which showed the friction disc type transmission. The cross-sectional view which showed the auxiliary | assistant transmission part periphery.

81 Friction disk transmission (transmission)
82 Input shaft 83 Drive disk 84 Driven disk 85 Output shaft 87 Power on / off shaft 88 Operation shaft 88a Metering knob 93 Power on / off means 95 Power disconnection clutch 98 Clutch lever 40 Fertilizer 100 Passenger rice transplanter (work machine)

Claims (2)

A friction disk type transmission is provided in the middle of a power transmission path for transmitting power from a traveling mission case of the work machine to a fertilizer having a plurality of feeding parts arranged on the rear part of the work machine, wherein the friction circle The plate-type transmission includes a drive disk provided on the input shaft, a driven disk arranged on the output shaft so as to be slidable in the axial direction, and an outer peripheral surface thereof being in sliding contact with the drive disk, and the driven An operation shaft that moves the disk in the radial direction of the drive disk and shifts the drive disk, and a power connection / disconnection clutch that slides the drive disk on the input shaft and separates or biases the driven disk against the driven disk When, and a power on-off means provided at the distal end of the output shaft, with protruding forward is provided a metering knob to the tip of the operation shaft, the clutch lever and the power input for operating the power disengaging clutch Transmission of the operating member means fertilization machine, characterized in that projecting on the metering knob in the same direction. 2. The transmission of a fertilizer applicator according to claim 1 , wherein the operation shaft and the clutch lever are disposed on the left and right sides of the drive disk.

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