JP6465010B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle including a floor step, which is a work space, in a machine body equipped with a fertilizer application apparatus.

  Some work vehicles such as a seedling transplanter that performs operations such as planting seedlings in a farm field include a fertilizer application device that supplies fertilizer to the farm field. In the prior patent documents, work space is secured by providing fertilizer application devices on the left and right of the traveling vehicle body, and work efficiency such as seedling replenishment work from the seedling stand at the front of the machine body to the seedling transplanting device at the rear can be improved. .

Japanese Patent Laying-Open No. 2015-163057

However, in the conventional fertilizer application, the weight balance of the left and right fertilizer application and the left and right fertilizer operation adjustment are insufficient due to the influence of the arrangement of the driving force transmission member and fertilizer adjustment device to the fertilizer. As a result, the amount of fertilizer applied differs in the fertilizer application, and as a result, the growth of seedlings differs from place to place, so that the work time for subsequent processes such as harvesting is not complete, and the quality of the harvested product is reduced.
In addition, the pair of left and right fertilization blocks in the conventional fertilizer application device is configured to be supported only by the left and right frames, and thus has low durability.
Moreover, the drive part and fertilization amount adjustment mechanism of the prior patent document are provided at the rear lower part of the floor step, and there are problems that it is difficult to adjust the fertilization amount and safety problems due to rotation of the drive shaft.

An object of the present invention, the fertilizer apparatus distributed in a left and right, have left and right assortment, and to provide a working vehicle to enable fertilization amount adjusting with improved durability.

The invention according to claim 1 is a work vehicle including a pair of left and right fertilization blocks (7, 7) respectively arranged on the left and right sides of the machine body, and a floor step (4 ) wherein the left and right fertilization frame supporting a pair of right and left fertilization block (7,7) (8,8) provided, left and right front frame for fixing each of the front side of the left and right fertilization frame (8,8) (3a, 3a) provided with a, the left and right rear frame (3b, 3b) for connecting the side and main frame (3) after the right and left fertilization frame (8,8) is provided, said pair of right and left fertilization blocks ( 7, 7) are configured to be capable of traveling interlocking operation by a transmission shaft, and the transmission shaft is received from a transmission case (11) that branches traveling power from a traveling support portion of the main frame (3). A first transmission shaft (12) for transmitting the applied fertilization power to one of the left and right fertilization blocks (7, 7) via a fertilization amount adjusting unit (13) for adjusting a fertilization operation amount, and the left and right fertilization blocks (7, 7) and the second transmission shaft (14) for transmitting the fertilizer power, and further, the fulcrum (12a) of the first transmission shaft (12) and the fertilizer application amount adjustment section (13). A working vehicle characterized in that a fulcrum is provided on the left and right fertilization frames (8, 8), and a fulcrum (14a) of the second transmission shaft (14) is provided on the left and right rear frames (3b, 3b). is there.

The invention according to claim 2 is the first adjustment rod (11a) for connecting the transmission case (11) and the first transmission shaft (12), the second transmission shaft (14) and the pair of left and right fertilizers. Left and right second adjustment rods (14b, 14b) for connecting the blocks (7, 7), respectively, are provided, and the lengths of the first adjustment rod (11a) and the second adjustment rods (14b, 14b) can be adjusted. The work vehicle according to claim 1, wherein the work vehicle is configured as described above.

The first related invention related to claim 1 or claim 2 is that the rear frames (3b, 3b) for fixing the rear portions of the left and right fertilization frames (8, 8) are respectively attached to the main frame (3). The fulcrum (14a, 14a) of the second transmission shaft (14) is provided on each of the left and right sides, and the fulcrum (14a) of the second transmission shaft (14) on the same side with respect to the fulcrum of the fertilizer application amount adjusting unit (13). The fertilizer application frame (8) and the rear frame (3b) are connected to each other at an intermediate position.

Further, in the first or second aspect of the present invention, or the second related invention related to the first related invention, the left and right fertilization blocks (7, 7) supply left and right transport air from the machine body inner position. Air ducts (22, 22) and left and right remaining discharge ducts (23, 23) for discharging residual fertilizer to the outside of the machine body, and these left and right remaining discharge ducts (23, 23) can be opened and closed. It is a work vehicle characterized by having discharge ports (23a, 23a).

The third related invention related to the first or second aspect of the invention or the second related invention is that the air chamber (22a) communicating the left and right air ducts (22, 22) is connected to the floor step. (4) It is provided along the rear edge, and the left and right remaining discharge ducts (23, 23) are respectively supported forward and downward from the left and right ends (22b, 22b) of the air chamber (22a). It is a work vehicle characterized by having exits (23a, 23a).

According to the invention of claim 1, the front side of the left and right fertilization frames (8, 8) is fixed by the left and right front frames (3a, 3a), and the rear side of the left and right fertilization frames (8, 8) is fixed to the left and right rear frames. By connecting to the main frame (3) via (3b, 3b), durability can be improved . Further, a fulcrum (12a) of the first transmission shaft (12) and a fulcrum of the fertilizer application amount adjusting portion (13) are provided on the fertilizer frame (8), and a fulcrum (14a) of the second transmission shaft (14) is provided on the rear frame (3b). The side fertilization structure that transmits power to the left and right does not require an extra transmission shaft or length adjustment mechanism, and can be operated at a low cost. Accuracy can be ensured.

In addition, a fulcrum (12a) of the first transmission shaft (12) and a fulcrum of the fertilization amount adjusting section (13) are provided on the left and right fertilization frames (8, 8), and the second transmission shaft (14) By providing the left and right rear frames (3b, 3b) at the fulcrum (14a), it is possible to minimize variations due to machine differences.
This requires an extra transmission shaft and adjustment mechanism in the structure that transmits power to the left and right.
The left and right operation accuracy can be ensured at low cost .

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the first adjustment rod (11a) for connecting the transmission case (11) and the first transmission shaft (12), and the second Left and right second adjustment rods (14b, 14b) for connecting the transmission shaft (14) and the pair of left and right fertilization blocks (7, 7), respectively, are provided, and the first adjustment rod (11a) and the second adjustment rod are provided. Since the length of the rods (14b, 14b) is adjustable, the feeding amount of the pair of left and right fertilization blocks (7, 7) can be adjusted, and maintenance work can be performed efficiently.

Moreover, according to 1st related invention, in addition to the effect of the invention which concerns on Claim 1 or Claim 2 , about the fulcrum of fertilization amount adjustment | control part (13), the fulcrum (14a) of the 2nd transmission shaft (14) of the same side By connecting the fertilizer frame (8, 8) and the rear frame (3b) at an intermediate position, variation due to machine differences can be reduced, and there is no need to provide an extra transmission shaft or length adjustment mechanism. Reduce costs.

Further, according to the second related invention, in addition to the effect of the invention according to claim 1 or claim 2 or the first related invention , the air duct (22, 22) is provided inside the fuselage, and the remaining amount discharge duct (23, Since 23) is on the outside of the machine body, manure can be discharged from the outside of the machine body by opening the left and right discharge ports (23a, 23a), so that the work efficiency is good.
Further, by separating the discharge of the fertilizer on the left and right, it is not necessary to switch the duct and the air direction for collecting the remaining fertilizer into one when discharging the fertilizer. In addition, air direction switching parts and the like are not required and can be configured at low cost.

Further, according to the third related invention, in addition to the effects of the invention according to claim 1 or claim 2 or the second related invention , the left and right outside residual discharge ducts (23, 23) are connected to the discharge ports (23a, By supporting it forwardly down to 23a), the residual fertilizer can be easily dropped by its own weight, the discharge speed is improved, and even a small amount of air can be discharged. In addition, maintenance is improved because water and fertilizer are not stored, preventing rainwater from entering.

The top view (a) and side view (b) which show the principal part of the riding rice transplanter which concerns on invention Plan view of main parts of fertilizer transmission system Side view of main part of fertilizer transmission system Rear view of main parts of fertilizer transmission system Plan view of main parts around fertilizer application equipment Left side view of main part of left fertilizer block Side view (a) and main part enlarged perspective view (b) of work vehicle Perspective view (a) and cross-sectional view (b) of sub-step part

  Embodiments of the invention specifically configured based on the above technical idea will be described below in detail with reference to the drawings. In the description, the front and rear and the left and right are referred to based on the forward direction (F) of the aircraft.

  FIG. 1 is a plan view (a) and a side view (b) showing a main part of a riding rice transplanter which is a work vehicle according to the invention.

  The riding rice transplanter 1 includes a floor step 4 on a main frame 3 supported so as to be able to run on the field by front and rear wheels 2a and 2b, a seedling transplanting device 5 as a field work device at the rear of the main frame 3, and a plurality of (see FIG. In the example shown, fertilizer blocks 7 in which the fertilizer units of 3) are arranged in the front-rear direction are arranged on the left and right sides of the machine body so that the traveling interlocking operation is possible.

  The left and right fertilization blocks 7 and 7 are, as shown in FIGS. 2, 3, and 4, sequentially showing a main part plan view, a main part side view, and a main part rear view of the fertilization transmission system. 8, 8 are extended and supported, and left and right front frames 3a, 3a and left and right rear frames 3b, 3b are provided on the left and right of the main frame 3 to fix the front and rear of the left and right fertilization frames 8, 8, respectively.

  Further, a fertilization amount adjusting unit 13 is provided below the fertilization block 7 on one side (right side in the illustrated example), and the fertilization power branched from the rear wheel transmission case 11 on the same side by connecting the first transmission shaft 12 to the front side. And the second transmission shaft 14 extending below the left and right fertilization blocks 7, 7 by being connected to the rear side of the fertilization amount adjusting unit 13, thereby lowering the floor step 4 and the left and right fertilization blocks 7, 7. The transmission system of the left and right fertilization blocks 7 and 7 is configured.

  The fulcrum 12a at the side end of the first transmission shaft 12 and the fulcrum of the fertilizer application amount adjusting portion 13 are provided in one plate of the right fertilization frame 8, and both end fulcrums of the second transmission shaft 14 are provided on the left and right rear frames 3b, 3b. 14a and 14a are provided, and the right rear frame 3b and the fertilization frame 8 are fixed with bolts at a position between the fulcrum of the fertilizer application amount adjusting unit 13 and the right fulcrum 14a of the second transmission shaft 14.

  In this way, in addition to securing the work space, while securing the transmission system and ensuring safety, the fulcrum 12a of the first transmission shaft 12 and the fulcrum of the fertilizer application amount adjusting unit 13 are provided on the fertilizer frame 8, and the second transmission shaft 14 By providing the fulcrum 14a on the rear frame 3b, variations due to machine differences can be minimized, and in the side fertilization structure that transmits power to the left and right, there is no need for an extra transmission shaft or length adjustment mechanism. The right and left operation accuracy can be ensured at a low cost.

  Further, the first adjustment rod 11a connected to the upper first transmission shaft 12 from the rear wheel transmission case 11 and the one-way clutch portions 7a of the left and right fertilization blocks 7 and 7 from both ends of the second transmission shaft 14 respectively. The left and right second adjusting rods 14b and 14b connected to the outer side 7a are configured to be adjustable in length.

  The fertilizer application amount adjusting unit 13 is connected to the first transmission shaft 12 and the second transmission shaft 14 via the input link 13a and the output link 13b, respectively, and is configured so that the input / output ratio can be adjusted by the swing fulcrum moving handle 13c. Thus, the traveling power is branched from the rear wheel transmission case 11 and transmitted through the first transmission shaft 12 and the fertilizer application amount adjustment unit 13 from the second transmission shaft 14 to the left and right fertilization blocks 7 and 7 in an adjustable manner. Can do.

  The transmission system having the above configuration adjusts the entire feed amount with the first adjustment rod 11a, and suppresses the left-right difference in the feed amount with the left and right second adjustment rods 14b, 14b, thereby allowing the left and right fertilizer blocks 7, 7 to move. The feeding amount can be adjusted efficiently.

(Medical fertilizer delivery part)
As shown in FIG. 5, a plan view of the main part around the left and right fertilization blocks 7, the medicinal fertilizer delivery section is connected to the fertilization hose 21... An air chamber 22a that is connected to the outside of the unit body and supplies air to each unit is provided in a substantially U-shape through the left and right sides along the rear edge of the floor step 4 from the inside of the body, and its left and right bent portions 22b. , 22b are formed in a T shape.

  Further, remaining amount discharge ducts 23 and 23 are provided on the outer side portions of the left and right fertilization blocks 7 and 7, respectively, and the rear ends thereof are supported by the left and right bent portions 22b and 22b of the air chamber 22a. As shown in FIG. 6, the left side view of the main part of each is configured so that the front ends thereof are front-lowering as discharge ports 23 a and 23 a that can be opened and closed by caps.

  Thus, by providing the respective left and right remaining amount discharge ducts 23, 23 with the respective discharge ports 23a, 23a, a duct for concentrated discharge, an air direction switching member, and the like are not required, so that the configuration is simple and low-cost. During fertilization work, the air volume can be secured with a single blower if both outlets 23a and 23a are closed with caps. When the remaining amount is discharged, the left and right remaining discharge ducts 23 and 23 are discharged by the inclination. Speed can be secured and water and fertilizer are discharged without accumulating inside, so cleaning becomes easy.

(Floor step)
The floor step 4 has a slope between the front step 4a and the rear step 4b as shown in FIG. 7 in a side view (a) and an enlarged perspective view (b) of the main part of the work vehicle. By providing a plurality of stepped protrusions 4d on 4c and 4c, the operator can move without sliding his / her foot. In addition, by removing the step by using a gentle slope, the worker can easily walk and the work space can be felt wide.

  Further, as shown in FIG. 8 which is a perspective view (a) and a cross-sectional view (b) of the sub-step portion, parts 4f and 4f of the front step 4a, that is, the upper portions of the sub-steps 4a and 4a are see-through shaped like a saw. And easy confirmation of the positions of the left and right sub-steps 4e, 4e provided at low positions that are blind spots on both sides of the front step 4a, so that the operator can feel safe and secure when getting off and on, especially when getting off To improve convenience.

(Technical significance)
The technical significance of the construction of the work vehicle is summarized as follows.

  The work vehicle having the above configuration includes a floor step 4 on the main frame 3 that is supported so as to be able to travel on the field, and is provided with a fertilizer that can be operated in conjunction with a transmission shaft. The left and right fertilization frames 8, 8 that support the left and right fertilization blocks 7, 7 project from the main frame 3 to the left and right, and the left and right fertilization frames 8, 8. Left and right front frames 3a and 3a for fixing the front sides of the main frame 3 are provided.

In this way, the fertilizer blocks 7 and 7 can be arranged on the left and right of the main frame 3 by the fertilizer frames 8 and 8 on the left and right sides of the machine body, and the left and right fertilizer frames are attached to the main frame 3 by the left and right front frames 3a and 3a. Durability can be improved by fixing 8 and 8 respectively.
Further, by providing the fertilizer blocks 7 and 7 on both the left and right sides of the traveling vehicle body, the work space is widened and the workability is improved, and the balance of the traveling vehicle body is also improved.

  Next, the transmission shaft includes a first transmission shaft 12 that transmits fertilization power to one of the left and right fertilization blocks 7 and 7 via a fertilization amount adjustment unit 13 that adjusts the fertilization operation amount, and the left and right fertilization blocks 7, The first transmission shaft 12 and the second transmission shaft 14 are arranged below the floor step 4 and the left and right fertilization blocks 7 and 7.

  In this way, fertilization power is transmitted from the first transmission shaft 12 to one fertilization block 7 so that the fertilization amount can be adjusted by the fertilization amount adjustment unit 13, and transmitted to the other fertilization block 7 via the second transmission shaft 14. In addition, the first transmission shaft 12, the fertilization amount adjusting unit 13, and the second transmission shaft 14, which are transmission components, are arranged below the floor step 4 and the left and right fertilization blocks 7 and 7, so that the floor step 4 And the fertilization blocks 7 and 7 play the role of the guard of a transmission system, and safety improves. Moreover, the work space on the floor step 4 is not disturbed.

  In addition, the work vehicle includes a transmission case 11 that branches the traveling power from the traveling support portion of the main frame 3, a first adjustment rod 11 a that connects the transmission case 11 and the first transmission shaft 12, and a second transmission. Left and right second adjustment rods 14b and 14b for connecting the shaft 14 and the left and right fertilization blocks 7 and 7 are provided, and the adjustment rods 11a and 14b are configured to be adjustable in length.

  Thus, the adjustment rods that can be adjusted in length at three locations can adjust the feeding amounts of the left and right fertilization blocks 7 and 7 with a minimum configuration, so that maintenance can be performed efficiently.

  Further, the work vehicle is provided with rear frames 3b, 3b for fixing the rear portions of the left and right fertilization frames 8, 8, respectively, on the left and right of the main frame 3 and provided with fulcrums 14a, 14a of the second transmission shaft 14, respectively. About the fulcrum of the adjustment part 13, the fertilization frame 8 and the rear frame 3b are connected in the intermediate position with the fulcrum 14a of the 2nd transmission shaft 14 of the same side.

In this way, with respect to the fulcrum of the fertilizer application amount adjustment unit 13, by connecting the fertilizer frames 8, 8 and the rear frame 3b at an intermediate position with the fulcrum 14a of the second transmission shaft 14 on the same side, variations due to machine differences can be avoided. Since there is no need to provide an extra transmission shaft or length adjustment mechanism,
Cost can be reduced.

  The work vehicle also includes left and right blow ducts 22 and 22 for supplying conveyance air from left and right positions to the left and right fertilization blocks 7 and 7 and left and right remaining amount discharge ducts 23 for discharging residual fertilizer to a position outside the fuselage. , 23, and left and right remaining discharge ducts 23, 23 are provided with discharge ports 23a, 23a, which can be opened and closed, respectively.

As described above, since the air ducts 22 and 22 are inside the machine body and the remaining amount discharge ducts 23 and 23 are outside the machine body, the left and right discharge ports 23a and 23a can be opened so that the fertilizer can be discharged from the outside of the machine body. Good work efficiency.
Further, by separating the discharge of the fertilizer on the left and right, it is not necessary to switch the duct and the air direction for collecting the remaining fertilizer into one when discharging the fertilizer. In addition, air direction switching parts and the like are not required and can be configured at low cost.

  In addition, the work vehicle is provided with an air chamber 22a communicating with the left and right air ducts 22 and 22 along the rear edge of the floor step 4, and left and right remaining amount discharge from the left and right bent portions 22b and 22b of the air chamber 22a. The ducts 23 and 23 are supported in the front-down direction, and the front ends are defined as discharge ports 23a and 23a.

  In this way, by supporting the remaining discharge ducts 23, 23 on the left and right outer sides forward to the discharge ports 23a, 23a, the residual fertilizer can be easily dropped by its own weight, the discharge speed is improved, and even less air can be discharged. . In addition, maintenance is improved because water and fertilizer are not stored, preventing rainwater from entering.

3 Main frame 3a Front frame 3b Rear frame 4 Floor step 7 Fertilizer block (fertilizer)
DESCRIPTION OF SYMBOLS 8 Fertilization frame 11 Transmission case 11a 1st adjustment rod 12 1st transmission shaft 13 Fertilization amount adjustment part 14 2nd transmission shaft 14a fulcrum 14b 2nd adjustment rod

Claims (2)

In a work vehicle comprising a pair of left and right fertilization blocks (7, 7) arranged on the left and right sides of the machine body
The main frame (3) supported so as to be able to run on the field by front and rear wheels is provided with a floor step (4), and left and right fertilization frames (8, 8) for supporting the pair of left and right fertilization blocks (7, 7) are provided,
Left and right front frame (3a, 3a) for fixing the front side of the left and right fertilization frame (8,8) respectively provided with a coupling side and the main frame (3) after the left and right fertilization frame (8,8) Left and right rear frames (3b, 3b)
The pair of left and right fertilization blocks (7, 7) are configured to be capable of traveling interlocking operation by a transmission shaft, and
The transmission shaft receives fertilization power received from a transmission case (11) that branches travel power from a travel support portion of the main frame (3) via a fertilization amount adjustment unit (13) that adjusts a fertilization operation amount. A first transmission shaft (12) that transmits to one of the left and right fertilization blocks (7, 7) and a second transmission shaft (14) that transmits the fertilization power between the left and right fertilization blocks (7, 7). Configure and further
The fulcrum (12a) of the first transmission shaft (12) and the fulcrum of the fertilizer application amount adjusting portion (13) are provided on the left and right fertilization frames (8, 8), and the fulcrum (14a) of the second transmission shaft (14). ) Provided with the left and right rear frames (3b, 3b). A first adjustment rod (11a) for connecting the transmission case (11) and the first transmission shaft (12), the second transmission shaft (14) and the pair of left and right fertilization blocks (7, 7). The left and right second adjusting rods (14b, 14b) are respectively connected to each other, and the first adjusting rod (11a) and the second adjusting rod (14b, 14b) are configured to be adjustable in length. The work vehicle according to claim 1.