JP2013128472A - Paddy field working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy field working vehicle which can easily and surely position and fix a transmission case or frame.SOLUTION: The paddy field working vehicle supporting a sowing device 9 for supplying an agricultural material to the surface of a paddy field on a sowing frame 47, includes a longitudinal transmission case 26 accommodating a transmission chain for transmitting a power from an engine disposed in the travel machine frame to the sowing device 9. The sowing frame 47 is fixed to the longitudinal transmission case 26 with a bolt 50 through a bracket 46, and a positioning mechanism different from the bolt 50 is configured between the bracket 46 and the longitudinal transmission case 26 or the sowing frame 47.

Description

  The present invention relates to a paddy field work vehicle, and more particularly, to a paddy field work vehicle in which a supply device for supplying agricultural materials to a rice field is supported by a frame.

  Conventionally, a paddy field vehicle is known in which a frame is provided with a supply device for supplying agricultural materials such as fertilizers, seeds, chemicals, and liquid fertilizers to the rice field (see, for example, Patent Document 1). The paddy field work vehicle described in Patent Document 1 is provided with a seeding device (feeding device) for direct sowing. The seeding device is configured such that the power from the mobile body is transmitted through the transmission case and driven. The seeding device is supported by a toolbar (frame). An inclined support member provided with a tool bar is fixed to the transmission case.

Japanese Utility Model Publication No. 62-172308

  By the way, in order to satisfactorily transmit power to the seeding device by the transmission case, it is necessary to accurately fix the transmission case at a predetermined position. Here, as a positioning method in the case where the transmission case and the frame are connected by a fixture such as a bolt, a method of positioning by temporarily tightening a bolt for fixing the transmission case is conceivable. According to this, the transmission case or the frame can be easily positioned by only temporarily tightening the bolt without final tightening.

  However, in this method, it is necessary to perform final tightening after the bolt is temporarily tightened. However, it is difficult to understand whether the bolt is only temporarily tightened or whether it is finally tightened. For this reason, there is a room for improvement in that the transmission case or the frame is securely fixed because the bolts may be forgotten to be tightened only by temporarily tightening the bolts.

  The present invention has been made in view of the above situation, and an object thereof is to provide a paddy field vehicle capable of easily positioning and securely fixing a transmission case or a frame.

  A first feature of the present invention is a paddy field work vehicle in which a supply device that supplies agricultural materials to a rice field is supported by a frame, and that transmits power from an engine provided in the traveling machine body to the supply device. A transmission case including a transmission mechanism; the frame is fixed to the transmission case with a fixture via a bracket; and the positioning is different from the fixture between the bracket and the transmission case or the frame. The mechanism is configured.

  According to the first feature of the present invention, since the positioning can be performed by a positioning mechanism separate from the fixing tool without being temporarily fixed by the fixing tool, and then the main fixing can be performed by the fixing tool from the beginning. Alternatively, the frame can be easily positioned and fixed securely. That is, the bracket and the transmission case, or the bracket and the frame, or the bracket, the transmission case, and the frame can be easily positioned and fixed securely.

  According to a second aspect of the present invention, the positioning mechanism is provided in a first pin hole formed in either the transmission case or the bracket, and in the other one of the transmission case or the bracket. A first pin inserted into one pin hole, a second pin hole formed in either the frame or the bracket, and provided in either the frame or the bracket, and inserted into the second pin hole And a second pin.

  According to the second feature of the present invention, since the transmission case can be positioned simply by inserting the first pin and the second pin into the first pin hole and the second pin hole, respectively, the conductive case and the frame can be positioned more easily. can do.

The side view which shows a paddy field work vehicle. The top view which shows a paddy field work vehicle. The side view which shows a working part. The plane sectional view showing a working part. The plane sectional view showing the composition of the lower part of a work part. The rear view which shows a working part. The rear view which shows a fertilizer application apparatus. Side surface partial sectional drawing which shows the state by which the seeding frame was fixed to the vertical transmission case via the bracket. The perspective view which shows a bracket. (A) Plan sectional drawing which shows the state which a seeding frame tends to be fixed to a vertical transmission case via a bracket. (B) Plan sectional drawing which shows the state by which the seeding frame was fixed to the vertical transmission case via the bracket. The side view which shows the working part which concerns on another embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the whole structure of a paddy field work vehicle is demonstrated with reference to FIGS.

  As shown in FIGS. 1 to 7, the paddy field work vehicle includes a traveling machine body 3 having a pair of left and right front wheels 1 and a pair of left and right rear wheels 2. An engine 15 and a transmission case 16 are provided at the front of the traveling machine body 3. A working part A is connected to the rear part of the traveling machine body 3 through a link mechanism 5 so as to be movable up and down. A driving seat 4 is provided at the center of the traveling machine body 3. In the vicinity of the driver's seat 4, there are provided a steering handle 6 that steers the pair of left and right front wheels 1, a travel shift lever 7, an operation lever 8 that performs a lifting operation of the working unit A, and the like. The paddy work vehicle transmits the power of the engine 15 to the pair of left and right front wheels 1 via the transmission case 16 and transmits to the pair of left and right rear wheels 2 via the rear wheel drive case 17. And a work transmission system for transmitting the power from the mission case 16 to the feed case 19 via the external output shaft 18.

  The working unit A includes a seeding device 9 as a “feeding device” for performing surface seeding of four strips on a field scene, a fertilizer application device 10 for applying powdered fertilizer to the field scene, and a field scene. A chemical spraying device 11 for spraying herbicides, a leveling float 12 for leveling the field scene to be worked, a marker 13 for drawing a travel index for the next travel distance adjacent to the work travel on the field scene, And a grooving device 14 for forming a drainage groove in the field. In the working unit A, the fertilizer application device 10 is located closest to the front side of the machine body, the seeding device 9 is located on the rear side of the machine body of the fertilizer application apparatus 10, and the drug spraying device 11 is located on the rear side of the machine body of the seeding device 9. Thus, they are configured to be arranged in the front-rear direction.

  The link mechanism 5 has an upper link 5a and a left and right lower link 5b whose front end is swingably supported with respect to a rear portion of the traveling machine body 3, and a vertical link 5c connected to these rear ends. It has. The link mechanism 5 is configured such that the rear end thereof is moved up and down by the operation of the hydraulic cylinder 20. A working portion A is supported at the lower end of the vertical link 5c via a feed case 19 so as to be swingable about a rolling axis X in a front-back orientation.

  A lateral transmission case 24 is connected to each of the left and right sides of the feed case 19. The lateral transmission case 24 is internally provided with a transmission shaft 23. A vertical transmission case 26 as a “transmission case” is connected to an end of the lateral transmission case 24 opposite to the feed case 19. The vertical transmission case 26 includes a transmission chain 25 as a “power transmission mechanism”.

  The seeding device 9 is configured so as to sow four fields on the field scene prepared by the leveling float 12 using a seed pod that has been subjected to iron coating treatment as a seed to be seeded. Specifically, the sowing apparatus 9 is configured to perform so-called spot sowing in which a plurality of seeds are sown at intervals in the front-rear direction. The seeding device 9 includes two seed hoppers 27 for storing seed pods for two strips, four seed feeding units 28 in total so that seeds are fed from each seed hopper 27, and each seed feeding unit. And four guide cylinders 29 for guiding the seeds fed from 28 directly below in a state in which the influence of the wind is suppressed.

  The seed feeding unit 28 includes a seed feeding roll 30 in which a plurality of recesses (not shown) for receiving seeds are formed on the outer periphery, and a seed feeding case 48 that houses the seed feeding roll 30. The seed feeding case 48 is fixed to a sowing frame 47 as a rectangular tube-shaped “frame” extending in the left-right direction. The seed feeding roll 30 is configured such that power from the engine 15 is transmitted and driven by a transmission chain 25 (see FIG. 8) housed in the vertical transmission case 26.

  Specifically, the power from the engine 15 is transmitted from the external output shaft 18 to the right and left transmission shafts 23 via a power transmission mechanism (not shown) built in the feed case 19, and further, the right and left The power is transmitted from the transmission shaft 23 to the right and left seeding drive shafts 41 via the transmission chain 25 in the vertical transmission case 26. In each of the right and left seeding drive shafts 41, a pair of drive gears 42 provided on the seeding drive shaft 41 and a pair of driven gears 44 provided on the roll shaft 43 of the two seed feeding rolls 30 Are engaged with each other, the power of the sowing drive shaft 41 is transmitted to the roll shaft 43, and the two seed feeding rolls 30 are driven.

  The fertilizer application apparatus 10 includes two fertilizer hoppers 56 for storing two strips of fertilizers, two fertilizer feeding units 57 in total so that the fertilizers are fed from the respective fertilizer hoppers 56, and each fertilizer feeding unit. Four fertilizer hoses 58 for guiding the fertilizer fed from 57, and four grooving devices 59 for creating grooves for supplying fertilizer guided by the respective fertilizer hoses 58 in the field scene; And four embedding guide bodies 60 for embedding the fertilizer supplied in the respective grooves.

  The fertilizer supply part 57 includes a fertilizer supply roll 66 in which a plurality of recesses (not shown) for receiving fertilizer are formed on the outer peripheral part, and a fertilizer supply case 57 a in which the fertilizer supply roll 66 is housed. The fertilizer supply case 57a is fixed to a rectangular tube-shaped fertilization frame 75 extending in the left-right direction. The fertilizer application frame 75 is supported by the right and left vertical transmission cases 26 via the right and left vertical frames 71. The fertilizer supply roll 66 is configured to be driven by transmission of power from the transmission shaft 23.

  Specifically, in each of the right and left transmission shafts 23, a rotating arm 69 provided on the transmission shaft 23, and a swing arm 68 provided on the roll shaft 67 of the two fertilizer feeding rolls 66, Are connected via a rod 70. Thus, when the rotation arm 69 rotates with the rotation of the transmission shaft 23, the swing arm 68 is reciprocally swung through the rod 70, and the power of the transmission shaft 23 is transmitted to the roll shaft 67. Two fertilizer supply rolls 66 are driven.

  Next, the vertical transmission case 26 and the bracket 46 will be described with reference to FIGS.

  As shown in FIG. 8, the vertical transmission case 26 includes a transmission chain 25 internally. The vertical transmission case 26 also serves as a support frame that supports the seeding device 9 and the fertilizer application 10. The vertical transmission case 26 includes a flat base member 26A and a lid member 26B formed in a substantially bowl shape. The vertical transmission case 26 is configured such that the base member 26A and the lid member 26B are bolt-connected, and the transmission chain 25 is housed therein. The longitudinal transmission case 26 is provided with an oiling cap 26a that plugs the oiling port 26d. As a result, the oil cap 26a can be removed and oil or grease can be injected from the oil port 26d into the transmission chain 25 and the like, and only the oil cap 26a is removed, so the lubrication operation becomes very simple. In addition, a seeding frame 47 is fixed to the vertical transmission case 26 with four bolts 50 as “fixing tools” via a bracket 46.

  As shown in FIGS. 8 and 9, the bracket 46 includes a first fixing portion 46 </ b> A and a second fixing portion 46 </ b> B. The bracket 46 is configured by connecting a first fixing portion 46A and a second fixing portion 46B so that one is substantially perpendicular to the other.

  The first fixing portion 46A is fixed to the vertical transmission case 26. 46 A of 1st fixing | fixed parts are comprised by the vertical plate-shaped member extended in the front-back direction. That is, 46 A of 1st fixing parts are comprised so that the surface outside the body may become a surface fixed to the longitudinal transmission case 26 along the surface inside the body of the longitudinal transmission case 26 (base member 26A). The first fixing portion 46A is formed with two bolt holes 46Aa into which the bolts 50 are inserted with a predetermined interval in the front-rear direction. In the first fixing portion 46A, a first pin 46C (headed pin) protruding toward the vertical transmission case 26 is provided between the two bolt holes 46Aa. A snap pin hole 46Ca into which the snap pin 52 is inserted is formed at the tip of the first pin 46C.

  The second fixing part 46 </ b> B is fixed to the sowing frame 47. The second fixing portion 46B is configured by a plate-like member that extends in the left-right direction. That is, the second fixing portion 46 </ b> B is configured such that the rear surface of the machine body is a surface fixed to the sowing frame 47 along the front surface of the sowing frame 47. Moreover, two bolt holes 46Ba into which the bolts 50 are inserted are formed in the second fixing portion 46B with a predetermined interval in the left-right direction. In the second fixing portion 46B, a second pin 46D (headed pin) protruding toward the sowing frame 47 is provided between the two bolt holes 46Ba. A snap pin hole 46Da into which the snap pin 52 is inserted is formed at the tip of the second pin 46D.

  Next, the procedure for fixing the sowing frame 47 to the vertical transmission case 26 will be described with reference to FIG.

  First, for the bracket 46, the first pin 46C of the first fixing portion 46A is inserted into the first pin hole 26c formed in the vertical transmission case 26, and the second pin 46D of the second fixing portion 46B is inserted into the seeding frame 47. Is inserted into the second pin hole 47b. In this state, the positions of the vertical transmission case 26 and the sowing frame 47 can be finely adjusted. Then, by inserting the snap pin 52 into the snap pin hole 46Ca of the first pin 46C and the snap pin hole 46Da of the second pin 46D, the seeding frame 47 is temporarily fixed (temporarily fixed) to the vertical transmission case 26. Thus, the first pin 46C and the first pin hole 26c, and the second pin 46D and the second pin hole 47b constitute the positioning mechanism 51.

  Thereafter, the bolt 50 is inserted into the bolt hole 46Aa of the first fixing portion 46A and the bolt hole 26b formed in the longitudinal transmission case 26, and the nut 50a is tightened via the washer 50b, and the bolt hole 46Ba of the second fixing portion 46B. The bolt 50 is inserted into the bolt hole 47a formed in the seeding frame 47 and the nut 50a is tightened via the washer 50b, so that the seeding frame 47 is fixed to the vertical transmission case 26 with the bolt 50 via the bracket 46 (this Fixed). Thus, the positioning can be performed by the positioning mechanism 51 different from the bolt 50 without being temporarily fixed by the bolt 50, and then the main fixing can be performed by the bolt 50 from the beginning. Therefore, the longitudinal transmission case 26 and the seeding frame 47 can be fixed. Can be easily positioned and fixed securely.

  The embodiment of the present invention may be as follows.

  In this embodiment, the rotation arm 69 is provided on the transmission shaft 23. However, as shown in FIG. 11, the rotation arm 69 is provided on the roll shaft 43 to improve the accuracy of the feeding amount. Good.

  In the present embodiment, the fertilizer application device 10 is provided in a state of being located on the front side of the machine body relative to the seeding device 9, but the fertilizer application device 10 is provided in a state of being located on the rear side of the machine body relative to the seeding device 9. Also good.

  In the present embodiment, it is assumed that the sowing device 9 that supplies seed rice to the rice field is used as the “supply device”, but the “supply device” is a supply device that supplies fertilizer, chemicals, liquid fertilizer, and other agricultural materials. For example, the fertilizer application device 10 may be used.

  In the present embodiment, the bracket 46 is configured separately from the vertical transmission case 26 and the seeding frame 47, but the bracket 46 is configured integrally with either the vertical transmission case 26 or the seeding frame 47. It may be.

  In the present embodiment, the positioning mechanism 51 is configured to include the two first pins 46C and the second pins 46D. However, the number of the first pins 46C and the second pins 46D is not limited to two. Absent.

In the present embodiment, the positioning mechanism 51 includes a first pin 46C and a second pin 46D provided in the bracket 46, a first pin hole 26c formed in the vertical transmission case 26, and a second pin hole 47b formed in the seeding frame 47. The first pin hole and the second pin hole are formed in the bracket 46, the first pin is provided in the longitudinal transmission case 26, and the second pin is provided in the seeding frame 47. Also good.
Further, the positioning mechanism 51 may be provided only between the vertical transmission case 26 and the bracket 46, or may be provided only between the bracket 46 and the sowing frame 47.

  INDUSTRIAL APPLICABILITY The present invention can be used for a paddy field work vehicle in which a supply device that supplies agricultural materials to a rice field is supported by a frame.

3 traveling machine body 9 seeding device (supply device)
15 Engine 25 Transmission chain (Power transmission mechanism)
26 Vertical transmission case (transmission case)
26c First pin hole 46 Bracket 46C First pin 46D Second pin 47 Sowing frame (frame)
47b Second pin hole 50 Bolt (fixing tool)
51 Positioning mechanism

Claims (2)

It is a paddy field work vehicle that supports a frame with a supply device that supplies agricultural materials to the rice field,
A transmission case having a power transmission mechanism for transmitting power from an engine provided in the traveling machine body to the supply device;
The frame is fixed to the transmission case with a fixture via a bracket,
A paddy field work vehicle in which a positioning mechanism different from the fixture is configured between the bracket and the transmission case or the frame. The positioning mechanism is
A first pin hole formed in either the transmission case or the bracket;
A first pin provided on the other of the transmission case or the bracket and inserted into the first pin hole;
A second pin hole formed in either the frame or the bracket;
The paddy field work vehicle according to claim 1, further comprising: a second pin that is provided on either the frame or the bracket and is inserted into the second pin hole.

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