JP2006094711A - Ditching wheel-driving apparatus of no-tilling direct sowing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate exchange of each ditching wheel in a ditching wheel-driving apparatus of a no-tilling direct sowing machine. <P>SOLUTION: The ditching wheel-driving shaft B constituting the ditching wheel-driving shaft apparatus A is divided into three bodies of a driving shaft body 16 in which many ditching wheels W are externally fitted at prescribed intervals in axial direction, a driving shaft-connecting body 19 inserted into the driving shaft body 16 and a pair of divided bodies 17a and 17b of driving shaft connected to a driving means installed in a machine body K, and large-sized connecting flange parts 18 and 25 larger than the driving body 16 are installed in the end of the driving shaft body 16 and the end of the driving shaft-connecting body 19 and each connecting flange part 32 is installed in the inner ends of a pair of divided bodies 17a and 17b of the driving shaft, and the connecting flange part 18 of the end of the driving shaft body 16 is connected to the connecting flange part 32 of the divided body 17a of the driving shaft on the driving side corresponding to the connecting flange part 18 by each connecting bolt 23, and the connecting flange part 25 of the end of the driving shaft-connecting body 19 is connected to the connecting flange part 32 of the divided body 17b of the driving shaft on the side to be driven corresponding to the connecting flange part 25. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a multi-row sowing groove in which a large number of grooved wheels are attached to a grooved wheel drive shaft supported in the width direction of the machine body at a predetermined interval, pulled by a towing vehicle, and grooved in a field. The present invention relates to a grooved wheel drive shaft device in a non-tillage direct sowing machine configured to sow immediately after grooving.

  First, the overall configuration of the no-tillage direct sowing machine will be described with reference to the drawings of the embodiments of the present invention. As shown in FIG. 1, the no-tillage direct sowing machine is connected to the rear part of a tractor (not shown) such as a tractor by a three-point link hitch method. The full weight is supported by the towing vehicle. The no-tillage direct sowing machine includes a machine body K, a grooving wheel drive shaft device A ′ disposed below the machine body K and having a plurality of grooving wheels W fitted on the grooving wheel drive shaft 51, and A hopper H disposed above the grooved wheel drive shaft device A ′.

  As shown in FIG. 13 (a), the outer peripheral edges of the pair of curved disks 52 and 53 constituting each grooved wheel W constituting the no-tillage direct sowing machine are substantially V-shaped sowing in the field. In order to form the groove V, it is always necessary to be sharp. However, even in such a grooved ring W, as shown in FIG. 13B, the outer peripheral edge of the grooved ring W is worn by contact with soil for a long period of time. , Gradually rounded. As a result, the length from the heel ring 54 to the outer peripheral edge of the grooved ring W is shortened, and the biting resistance of the grooved ring W with respect to the soil is increased, so that the heel ring 54 is lifted and formed. The depth (D ′) of V becomes shallower than the set depth (D). Then, as shown in FIGS. 14A and 14B, the following problems occur. (1) If the depth (D ′) of the sowing groove V is the set depth (D), the bird's beak 55 will not reach the groove bottom, but if the depth is smaller than the set depth (D), The bird's beak 55 reaches the groove bottom, and the seed S immediately after being sown becomes easy to be preyed. (2) Grown crops such as rice are easily laid down by typhoons.

  Moreover, the shape of the bottom part of the seeding groove | channel V will also become wide corresponding to the shape of the outer-periphery edge part of the round grooved ring W. FIG. Then, germination conditions of the seed S dropped on the bottom of the sowing groove V are deteriorated. That is, in the no-tillage direct sowing method, as shown in FIG. 14 (a), the seed S dropped on the bottom of the sowing groove V is in close contact with both inner wall surfaces Va (earth wall) of the bottom of the groove V. As shown in FIG. 14B, when the bottom of the sowing groove V is rounded and widened, the above cannot be realized and the germination conditions are also set. Deteriorate. That is, as shown in FIG. 14 (a), when the bottom of the sowing groove V maintains a sharp V-shape and the dropped seed S is in contact with both inner wall surfaces Va, the seed S Since the humidity in the surrounding area is high, moisture is properly supplied to the seed S, and a good local climate is maintained, so that good germination conditions are maintained. On the other hand, as shown in FIG. 14B, when the seed S is dropped on the wide groove bottom, the seed S is easily dried and germination conditions are deteriorated. As the germination rate decreases, the germination state becomes uneven, and as a result, the harvest rate of crops such as rice is lowered.

  In order to avoid the above-described problems, it is necessary to reduce the wear of the outer peripheral edge of the grooved ring W. The present applicant has also applied for an invention relating to the improvement of the grooved ring W (see Patent Document 1).

Even so, it is difficult to avoid wear of the outer peripheral edge of the grooved ring W, and it is necessary to replace the worn grooved ring W with a new one. In the case of the conventional side drive type grooved wheel drive shaft device A ′, each grooved wheel W is fitted on one grooved wheel drive shaft 51 attached to the machine body K as shown in FIG. Has been. The grooved wheel drive shaft 51 is supported by bearings 57 housed in a pair of side frames 56 constituting the machine body K. When exchanging each grooved wheel W, the bearing 57 built in the side frame 56 on one side is removed, and in this state, one end of the grooved wheel drive shaft 51 is shifted in the axial direction, so that the grooved wheel drive shaft is 51 is removed from the side frame 56 on the other side. Next, each groove ring W is extracted from the groove ring drive shaft 51. As a result, it takes a lot of time to replace the groove ring W.
JP 2002-65008 A

  An object of the present invention is to enable easy replacement of a grooved ring in a no-tillage direct sowing machine.

  A first aspect of the invention for solving the above-described problem is that a plurality of grooved wheels are attached to a grooved wheel drive shaft supported in the width direction of the machine body at a predetermined interval and pulled by a towing vehicle. In the no-tillage direct sowing machine configured to sow directly into the multi-row sowing groove that has been grooved immediately after grooving, the grooving wheel drive shaft is in a state where a large number of grooving rings are fitted at predetermined intervals. The drive shaft main body is integrally attached to only one end portion in the axial direction, and the connection collar portion is integrally attached only to the inner end portion of the short shaft body. It consists of a pair of drive shaft divided bodies that are supported opposite to each other on the inner sides of the lower ends of a pair of side frames provided opposite to both ends in the width direction, and connected to only the outer end of the short shaft. The part is attached integrally, and the short shaft body is inserted into the end of the drive shaft main body opposite to the connecting collar, A drive shaft coupling body attached to the dynamic shaft main body, wherein one end portion of the drive shaft main body is coupled to one drive shaft divided body via a coupling flange, and the other end portion of the drive shaft main body is coupled to the drive shaft. It is characterized in that it is connected to the other drive shaft split body via a connecting body.

  In the grooved wheel drive shaft device according to the present invention, an operation when each grooved wheel attached to the grooved wheel drive shaft is replaced will be described. (1) The connecting means (bolt) that connects the drive shaft main body and the drive shaft split body is released at the connecting hooks at both ends of the drive shaft main body, and the connecting hooks and the drive shaft of the drive shaft main body are released. Separate the divided body. Thereby, a drive shaft main body can be removed from the body of a no-till direct seeding machine. (2) The drive shaft coupling body is removed from one end of the drive shaft main body removed from the machine body. (3) In the drive shaft main body, each grooved wheel is moved to the side where the connecting collar portion is not formed, and the grooved wheels worn from the drive shaft main body are sequentially removed. (4) Next, in the drive shaft main body, new grooved rings are sequentially fitted from the side where the connecting collar portion is not formed, and then moved in the axial direction to be fixed at a predetermined position. (5) A drive shaft coupling body is inserted into one end of the drive shaft main body. (6) The connecting shafts of the drive shaft main body and the drive shaft connecting body are connected to the connecting hooks of the pair of drive shaft split bodies. As a result, the grooving wheel drive shaft on which the new grooving wheel is fitted is attached to the airframe.

  As described above, in the first aspect of the invention, the grooved wheel drive shaft is divided into the drive shaft main body and the pair of drive shaft divided bodies. For this reason, only the drive shaft main body among the grooved wheel drive shafts can be removed from the body of the no-till direct sowing machine. And since the old and new grooved ring can be replaced | exchanged by removing a drive shaft coupling body from this drive shaft main body, the replacement | exchange operation | work of a grooved ring is easy.

  According to a second aspect of the present invention, on the premise of the first aspect of the invention, the drive shaft coupling body inserted into the end portion of the drive shaft main body is integrated with the grooved ring that is externally fitted to the end portion. It is connected to the drive shaft body. According to the second aspect of the present invention, the grooved ring can be externally fitted to the end of the drive shaft main body, so that the number of seeding lines in one seeding operation is increased, and the work efficiency is increased.

  According to a third aspect of the present invention, on the premise of the first or second aspect of the invention, the connecting rod portion integrally attached to the drive shaft main body is arranged on the drive side, and the connection rod of the drive shaft divided body on the drive side is arranged. It is characterized in that it is integrally connected with the part. According to the invention of claim 3, since the side connected to the drive shaft divided body via the drive shaft connecting body is the non-transmission side of the power, there is no possibility of reducing the power transmission efficiency, and the drive shaft transmission section Can be secured.

  According to a fourth aspect of the present invention, on the premise of any one of the first to third aspects, the grooved wheel is displaced in the axial direction with respect to the longitudinal center of the mounting body fitted on the drive shaft body. A grooved ring main body is integrally mounted at a position, and a large number of grooved rings that are externally fitted to the drive shaft main body are arranged on both the left and right sides with respect to the central portion in the axial direction of the drive shaft main body. It is characterized in that it is externally fitted to the part in a state where the left and right are reversed. According to the invention of claim 4, it is possible to increase the number of grooved wheels that can be arranged within the width of the airframe while keeping the width of the airframe and the mounting interval between the grooved wheels constant. The grooved rings to be fitted can all be of the same shape.

  The grooved wheel drive shaft constituting the grooved wheel drive shaft device of the non-tillage direct sowing machine of the present invention has a large number of grooved wheels integrally attached with a predetermined interval in an externally fitted state, and one end in the axial direction. The drive shaft main body with the connecting rod part integrally attached only to the part and the connecting collar part integrally attached only to the inner end part of the short shaft body are provided opposite to both ends in the width direction of the machine body. A pair of drive shaft divided bodies that are supported opposite to each other on the inner side of the lower ends of the pair of side frames, and the connecting shaft is integrally attached only to the outer end portion of the short shaft body. The short shaft body is inserted into an end portion on the opposite side of the connecting collar portion of the main body, and a driving shaft connecting body is attached to the driving shaft main body, and one end portion of the driving shaft main body is interposed via the connecting collar portion. It is connected to one drive shaft divided body, and the other end of the drive shaft main body is connected to the other drive shaft divided body via the drive shaft connected body. It is characterized by being sintered. Therefore, by removing only the drive shaft main body from the body of the direct tiller and removing the drive shaft coupling body from the drive shaft main body, the old and new grooved wheels can be replaced, and the grooved wheel replacement work Is easy.

  Hereinafter, the present invention will be described in more detail with reference to examples. FIG. 1 is a side view of a no-tilt direct sowing machine to which a grooved wheel drive shaft device A of the present invention is attached, FIG. 2 is a schematic plan view, and FIG. 3 is a view of the grooved wheel drive shaft device A viewed from the front in the traveling direction. FIG. 4 is a perspective view of a state in which the drive shaft body unit U of the grooved wheel drive shaft B is separated from the machine body K, FIG. 5 is an exploded view of the grooved wheel drive shaft B, and FIG. FIG. 7 is a sectional view taken along line XX in FIG. 6, FIG. 8 is a perspective view in which a part of the other end of the grooved wheel driving shaft B is broken, and FIG. 9 is driven. FIG. 10 is a perspective view of a state in which the drive shaft main body 16 and the drive shaft coupling body 19 are separated, and FIG. 11 is a perspective view of the drive shaft main body 16 and the drive shaft coupling body 19. It is sectional drawing of a connection part.

  As shown in FIGS. 1 and 2, a no-tillage direct sowing machine is connected to the rear of a towing vehicle (not shown). The machine body K of the no-tillage direct sowing machine is provided with a grooving wheel drive shaft device A, and a hopper H is directly above each of the many grooving wheels W fitted on the grooving wheel drive shaft device A. Is supported. The hopper H can accommodate seed S (see FIG. 14) and fertilizer separately. Each hopper H is separated into a seed storage chamber 1a and a fertilizer storage chamber 1b by a separating plate 1 provided in the interior, and the hopper H is separately fed from the storage chambers 1a and 1b below the hopper H. A receiver 2 capable of accommodating the seed S and the fertilizer in a mixed state is attached. A seeding hose 3 for guiding a mixture of seed S and fertilizer is connected to each seeder 2 in each seeding groove V formed in the field. And the driving wheel 4 is attached to either one of the left and right both ends in the front part of the body K. The drive wheel 4 is always urged downward by a compression spring (not shown), and can rotate without slipping due to the ground pressure of the compression spring. In FIG. 1, reference numeral 5 denotes a cover soil chain provided at the same position as each grooved wheel W behind the grooved wheel drive shaft device A in the machine body K.

  As FIG. 3 shows, the body K which comprises the no-till direct sowing machine of a present Example is a portal type in front view. In other words, a pair of cylindrical intermediate frames 7 are extended from the center frame 6 also serving as a casing toward both sides from the center frame 6 which is disposed in the center of the width direction (left and right direction) in the no-tillage direct sowing machine. Further, a pair of side frames 8 are attached at substantially right angles from the front ends of the pair of intermediate frames 7 downward. The center frame 6 is closed by a cap body 9. A bearing 9a is mounted on the front portion of the cap body 9 along the traveling direction R of the airframe K, and an input shaft 11 connected to the PTO shaft (power take-off shaft) of the tractor rotates on the bearing 9a. It is supported freely. A bevel gear 11 a is attached to the end of the input shaft 11. The cap body 9 of the center frame 6 has a bearing support portion 12 extending rearward, and is attached to the bearing 12a attached to the bearing support portion 12 and the upper portion of the side frame 8 on one side. The transmission shaft 14 is rotatably supported on the bearing 13 a of the bearing bracket 13. A bevel gear 14a that meshes with the bevel gear 11a of the input shaft 11 described above is attached to one end of the transmission shaft 14 (the end on the side of the center frame 6). The upper chain gear 15 is attached to the end portion on the other side. In FIGS. 3 and 4, the input shaft 11 is arranged vertically for the purpose of illustration, but in an actual no-tillage direct sowing machine, the input shaft 11 is arranged almost horizontally.

  As shown in FIGS. 3 to 5, a grooved wheel drive shaft device A according to the present invention is disposed below the machine body K. The grooved wheel drive shaft device A includes a grooved wheel drive shaft B and drive means (described later) for driving and rotating the grooved wheel drive shaft B. The grooved wheel drive shaft B of the present embodiment is divided into three in the axial direction, and a drive shaft body 16 on which a large number of grooved wheels W are fitted with a predetermined mounting interval P, and the drive shaft body 16 It comprises a pair of drive shaft divided bodies (a drive side drive shaft divided body 17a and a driven side drive shaft divided body 17b) connected to both sides of the drive shaft. Hereinafter, the drive shaft main body 16 in which a large number of grooved wheels W are externally fitted is referred to as a “drive shaft main body unit U”.

  First, the drive shaft body 16 will be described. As shown in FIGS. 4 and 5, at one end in the axial direction of the pipe-shaped drive shaft main body 16, a disk-shaped connecting collar portion 18 having a diameter larger than the outer diameter of the drive shaft main body 16 is pivoted. While being fixed with the same center, the other end is opened, and a drive shaft connecting body 19 connected to the driven side drive shaft dividing body 17b is detachably attached. On the outer peripheral surface of the drive shaft main body 16, pin insertion holes 16 a for inserting each grooved ring connection pin 21 for fitting and fixing a large number of grooved wheels W are provided at predetermined intervals in the axial direction (the grooves of the grooved wheels W). A pin insertion hole 16b through which a shaft coupling pin 22 for inserting and fixing the drive shaft coupling body 19 is inserted is provided in a penetrating state with an interval equal to the mounting interval P). Further, each of the connecting flange portions 18 is provided with bolt insertion holes 18a through which the connecting bolts 23 for connecting the driving shaft main body 16 and the driving shaft divided body 17a are inserted along the circumferential direction. Yes.

  As shown in FIGS. 8 to 10, the drive shaft connecting body 19 is made of a pipe material, and is connected to the end of the connecting shaft portion 24 having a diameter slightly smaller than the inner diameter of the drive shaft main body 16. A connection flange 25 similar to the connection flange 18 attached to one end is fixed with the same axial center. Further, on the outer peripheral surface of the connecting shaft portion 24, pin insertion holes 24a and 24b for inserting the grooved ring connecting pin 21 and the shaft connecting pin 22 are provided in a penetrating state. In the drive shaft connecting body 19, the connecting shaft portion 24 is inserted into the other end portion of the drive shaft main body 16 (the end portion on the side where the connecting collar portion 18 is not provided), and the pin insertion holes 16b, 24b of both are matched. Is done. Then, the shaft connecting pin 22 is inserted into each pin insertion hole 16b, 24b, and the drive shaft main body 16 and the drive shaft connecting body 19 are integrated. Thereby, the drive shaft main body 16 and the drive shaft coupling body 19 are integrally fixed in a non-rotating state. A pair of body-side connecting collars 18 and 25 are formed at both ends of the grooved wheel drive shaft B constituted by connecting and fixing the drive shaft body 16 and the drive shaft coupling body 19. As shown in FIG. 11, in the shaft coupling pin 22, the retaining pin 26 is attached to a portion protruding from the drive shaft main body 16, so that the shaft coupling pin 22 is prevented from being detached.

  In the grooved wheel drive shaft B of the present embodiment, the connecting shaft portion 24 of the drive shaft connecting body 19 is inserted into the end portion of the drive shaft main body 16, and the grooved wheel W is externally fitted to the overlapping portion between them. Accordingly, since the grooved ring W can be externally fitted to the end of the drive shaft main body 16, the grooved ring W that is externally fitted to the drive shaft main body 16 without increasing the width of the machine body K. The number of seeding grooves V formed in one seeding groove operation increases, and the working efficiency increases.

  Next, the means for driving the grooved wheel drive shaft B of this embodiment and the pair of drive shaft split bodies 17a and 17b will be described. The bearing brackets 27 are attached to the lower ends of the pair of side frames 8 attached to the machine body K so as to face each other. As shown in FIG. 6, each bearing bracket 27 includes a bearing 28, and drive shaft divided bodies 17 a and 17 b are rotatably supported by the bearings 28. Since the difference between the pair of drive shaft split bodies 17a and 17b is only whether or not they are connected to the drive means (lower chain gear 29), here they are connected to the drive side (lower chain gear 29). Only the drive shaft divided body 17a will be described. The drive shaft divided body 17a is fixed to one end portion of the stepped shaft portion 31 fitted to the bearing 28 with a connecting collar portion 32 having a diameter larger than the outer diameter of the stepped shaft portion 31 having the same axial center. In addition, a presser ring 33 is provided at the other end of the stepped shaft 31 at the end of the spline shaft 31 a fitted to the lower chain gear 29. The connecting hook 32 has a plurality of bolt insertion holes 32a for inserting the connecting bolts 23 described above, the bolt insertion holes 18a of the connecting hook 18 in the drive shaft body 16, and the drive shaft connecting body 19. Are provided corresponding to the respective bolt insertion holes 25a of the connecting collar 25.

  The drive shaft split body 17a is supported by a bearing 28 of a bearing bracket 27 attached to the lower portion of the side frame 8. Then, the lower chain gear 29 is fitted to the spline shaft portion 31 a in the protruding portion from the bearing 28 in the drive shaft divided body 17 a and is fixed by the pressing ring 33. In this state, the upper and lower chain gears 15 and 29 are arranged at substantially the same position in plan view. As shown in FIG. 3, a chain 34 is hung on the upper and lower chain gears 15 and 29. The power of the towing vehicle transmitted from the input shaft 11 to the transmission shaft 14 via the bevel gears 11a and 14a is transmitted to the drive-side drive shaft divided body 17a via the upper and lower chain gears 15 and 29 and the chain 34. Is done. Thereby, the drive shaft division body 17a is driven to rotate. In the case of the present embodiment, the power of the towing vehicle is transmitted only to the drive-side drive shaft divided body 17a, and the driven-side drive shaft divided body 17b only rotates with the drive shaft main body 16. As shown in FIG. 9, the configuration of the driven-side drive shaft divided body 17b is the same as that of the drive-side divided drive shaft 17a except that the stepped shaft portion 31 is not provided with the spline shaft portion 31a. Is almost the same. In FIG. 3, reference numeral 35 denotes a cover body for covering the upper and lower chain gears 15 and 29 and the chain 34.

  As shown in FIGS. 4 and 6, the connecting flange portions 18 and 25 of the drive shaft main body 16 and the drive shaft connecting body 19 and the connecting flange portions 32 of the pair of drive shaft split bodies 17 a and 17 b are overlapped. At this time, each bolt insertion hole 18a, 25a, 32a is matched. In this state, the connecting bolts 23 are inserted into the bolt insertion holes 18a, 25a, 32a from the connecting shaft portions 18, 25 of the driving shaft main body 16 and the driving shaft connecting body, and a pair of driving shaft split bodies 17a, A hexagonal nut 36 is screwed into the male thread portion projecting from each connecting flange portion 32 of 17b. When the hexagon nuts 36 are firmly tightened, the drive shaft main body 16 and the drive shaft coupling body 19 and the pair of drive shaft divided bodies 17a and 17b are integrally coupled. By loosening the hexagon nuts 36 and extracting the connecting bolts 23, the drive shaft main body 16 and the drive shaft connecting body 19 and the pair of drive shaft split bodies 17a and 17b can be separated.

  Next, the groove ring W will be described. As shown in FIGS. 6 and 7, the grooved ring W is formed so that the concave surfaces of the pair of curved disks 37, 38 having slightly different outer diameters face each other. It is formed by integrally welding with the outer peripheral edge part in close contact with each other. The outer peripheral surfaces of the pair of curved discs 37, 38 have the same diameter on the outer peripheral surfaces of the pair of curved discs 37, 38 so that only the outer peripheral edge portion (a portion having a predetermined length from the outer peripheral edge) can enter the ground. The heel ring 39 is integrally attached. Of the pair of curved discs 37, 38, induction hardening is performed only in the annular region of the outer peripheral edge on the convex surface side of the large-diameter curved disc 37.

  Mounting holes 37a and 38a are provided in the axial center portions of the curved disks 37 and 38, respectively. Pipe-shaped attachment bodies 41 are fitted into the attachment holes 37a, 38a, and the joint portions of the two are welded, so that the curved disks 37, 38 and the attachment body 41 are integrated. Each end of the mounting body 41 (the part removed from the collar ring 39) is provided with a pin insertion hole 41a through which the grooved ring connecting pin 21 is inserted in a penetrating state in the direction perpendicular to the axis. Further, on the outer peripheral surface of the mounting body 41, the bolt insertion holes 41b are provided on the outer side of the pair of curved disks 37 and 38 in the axial direction so as to be perpendicular to the pin insertion holes 41a. ing. Hex nuts 42 are fixed to the bolt insertion holes 41b on the outer peripheral surface of the mounting body 41 in the same axial center as the bolt insertion holes 41b, and the fixing bolts 43 are screwed to the hexagon nuts 42. Yes.

  As shown in FIGS. 6 and 7, each grooved wheel W is mounted by fitting the attachment body 41 into the outer peripheral surface of the drive shaft main body 16. The pin insertion hole 41a of the mounting body 41 and the pin insertion holes 16a and 24a provided in the connection shaft portion 24 of the drive shaft main body 16 and the drive shaft connection body 19 corresponding to the pin insertion hole 41a are matched. The grooved ring connecting pin 21 is inserted into the pin insertion holes 16a, 24a, 41a and fixed in a non-rotating state. Further, the fixing bolt 43 that is screwed into each hexagon nut 42 and slightly protrudes from the bolt insertion hole 41 b of the mounting body 41 presses the drive shaft body 16. Thereby, the rattling of the groove ring W with respect to the drive shaft main body 16 is eliminated. In FIG. 6, reference numeral 44 denotes a retaining pin for holding the grooved ring connecting pin 21 in a retaining state.

  The operation of the grooved wheel drive shaft device A according to the present invention will be described. As shown in FIGS. 1 and 2, when the airframe K is pulled by the towing vehicle and travels in the traveling direction R, the power of the towing vehicle is transmitted to the grooved wheel drive shaft B and each grooved wheel W is driven to rotate. In the field, seeding grooves V having a depth D corresponding to the length from the heel ring 39 to the outer peripheral edge of the grooved wheel W are formed at a predetermined interval (mounting interval P between the grooved wheels W). (See FIG. 13). Further, when the driving wheel 4 is rotated, the rotational force of the driving wheel 4 operates a feeding mechanism (not shown) in the hopper H via a transmission mechanism (not shown). The seed S and the fertilizer separately stored in the storage chambers 1a and 1b in the hopper H are fed out and mixed in the receiver 2 immediately below, and the mixture of both is transferred to the machine body K through the sowing hose 3. Is dropped into each sowing groove V by an amount proportional to the traveling speed of the. That is, sowing and fertilization are simultaneously performed on the sowing groove V. Immediately after sowing and fertilization, a small amount of soil is dropped in the sowing groove V by the soil covering chain 5 to cover the seed S and fertilizer.

  Since the outer peripheral edge portions of the pair of curved disks 37 and 38 constituting each grooved ring W are worn by long-term use, they must be periodically replaced. Next, an operation when the worn grooved ring W is replaced with a new grooved ring W will be described. First, the grooved wheel drive shaft B is separated from the machine body K. In the case of the grooved wheel drive shaft device A of the present embodiment, the grooved wheel drive shaft B is divided into three parts, and the drive shaft body unit U (a state where a large number of grooved wheels W are externally fitted to the drive shaft body 16). ) And the pair of drive shaft split bodies 17a and 17b attached to the side frame 8 of the machine body K are released, so that only the drive shaft body unit U is separated from the machine body K.

  As shown in FIG. 4, the connecting rod portions 18 and 25 provided at both ends in the axial direction of the drive shaft main unit U are connected to the connecting rod portions 32 of the pair of drive shaft divided bodies 17a and 17b. Loosen the numerous hexagon nuts 36 that are present, and pull out each connecting bolt 23. Thereby, the connection between the drive shaft body unit U and the pair of drive shaft divided bodies 17 is released. The shaft connecting pin 22 that connects and fixes the drive shaft main body 16 and the drive shaft connecting body 19 and one end of the drive shaft main body 16 and the drive shaft main body 16 (on the side where the connecting collar 18 is not provided). The grooved ring connecting pin 21 for connecting and fixing the grooved ring W fitted to the end) is extracted. Thereby, the drive shaft main body 16 and the drive shaft coupling body 19 can be separated. When the drive shaft main body 16 and the drive shaft coupling body 19 are separated, one end of the drive shaft main body 16 is opened. Subsequently, each grooved ring connection pin 21 that connects and fixes the drive shaft body 16 and the other grooved ring W is extracted. Each grooved ring W that has been disconnected from the drive shaft main body 16 is moved to one end of the drive shaft main body 16 while sliding the outer peripheral surface of the drive shaft main body 16, and each grooved ring W that has been worn is worn. Is removed from the drive shaft body 16. Thereby, all the grooved wheels W can be sequentially removed from the drive shaft main body 16.

  Then, from the side of the drive shaft main body 16 where the connecting collar 18 is not provided, new grooved wheels W are sequentially fitted onto the drive shaft main body 16, and the outer peripheral surface of the drive shaft main body 16 is slid in the axial direction. It is moved and placed at a predetermined position. Subsequently, the connecting shaft portion 24 of the driving shaft connecting body 19 is inserted into one end portion of the driving shaft main body 16. The pin insertion hole 16b of the drive shaft main body 16 and the pin insertion hole 24b of the connection shaft portion 24 of the drive shaft connecting body 19 are matched to each other, and the shaft connecting pin 22 is inserted, so that the drive shaft main body 16 and the drive shaft connecting body 19 are inserted. And fix them together. In this state, the pin insertion hole 41a in the mounting body 41 of each grooved wheel W and the pin insertion holes 16a, 24a of the drive shaft main body 16 and the drive shaft connecting body 19 are matched to each other, and each grooved ring connecting pin 21 is Each grooved ring W is connected and fixed to the drive shaft body 16 by being inserted. By the above-described operation, the drive shaft main unit U to which the new groove ring W is fitted is formed. A pair of connecting flanges 18 and 25 provided at both axial ends of the drive shaft main unit U are applied to the corresponding connecting flanges 32 of the corresponding pair of drive shaft divided bodies 17a and 17b, and each bolt is inserted. The holes 18a, 25a, 32a are matched. The connecting bolts 23 are inserted into the bolt insertion holes 18a, 25a, 32a from the pair of connecting rod portions 18, 25 of the drive shaft main unit U, and the connecting rod portions 32 of the pair of drive shaft divided bodies 17a, 17b are inserted. The hexagonal nut 36 is tightened into the male thread portion protruding from the end. As a result, the drive shaft body unit U and the pair of drive shaft divided bodies 17a and 17b are integrally connected and fixed.

  As described above, in the grooved wheel drive shaft device A of the present embodiment, when the drive shaft body unit U of the grooved wheel drive shaft B is separated from the machine body K of the no-tillage direct sowing machine, the side constituting the machine body K is separated. It is not necessary to remove the bearing 57 (see FIG. 15) from the frame 8. In other words, since only the drive shaft body unit U can be removed while the bearings 57 are attached to the side frames 8, the replacement work of the old and new grooved wheels W is easy. Since the pair of drive shaft split bodies 17a and 17b remain supported by the side frame 8 of the machine body K while the old and new grooved wheels W are being replaced, the drive shaft split bodies 17a and 17b are supported. No need to disassemble and assemble, and even from this aspect, it is easy to replace the old and new grooved wheels W.

  As shown in FIG. 12, in the grooved wheel W of the present embodiment, in order to provide the pin insertion hole 41a in the mounting body 41, the mounting positions of the curved disks 37 and 38 (joining of the curved disks) Position) is shifted in the axial direction by a distance b from the longitudinal center C of the mounting body 41. A large number (10 in this embodiment) of grooved wheels W in the drive shaft main body 16 are horizontally reversed from each other at each of the left and right sides with respect to the approximate center of the drive shaft main body 16 in the axial direction. (In this embodiment, five grooved wheels W are opposed to each other). For this reason, in order to fix each grooved ring W that is turned right and left and is fitted to the left and right sides of the drive shaft body 16, the grooved ring W is mounted at the mounting interval P of the grooved ring W. The number of pin insertion holes 16a (10 in this embodiment) corresponding to the number of pin insertion holes 16a is provided. Among these, the interval P ′ between the two pin insertion holes 16a provided in the substantially central portion of the drive shaft body 16 corresponds to a pair of grooved wheels W that are externally fitted to face the respective pin insertion holes 16a. is doing. That is, in the grooved ring W, when the distance from the joining position of the pair of curved disks 37 and 38 to the pin insertion hole 24a in the mounting body 41 is “a”, P = 2 × a + P ′, From the equation, P ′ = P−2 × a is established. Here, since the mounting interval P between the grooved wheels W is constant, the interval P ′ between the two pin insertion holes 16a at the substantially central portion in the axial direction of the drive shaft body 16 is (P−2 × a). As a result, a large number of grooved wheels W can be externally fitted to the left and right sides of the axial center of the drive shaft body 16 in a state where the left and right sides are reversed.

  Thereby, it is possible to increase the number of grooved wheels W attached to the machine body K without making the mounting interval P between all the grooved wheels W constant and increasing the width of the machined body K. In addition, all the grooved wheels W fitted on the drive shaft body 16 can be of the same shape, and it is not necessary to use the grooved wheels W of different structures only at both ends of the drive shaft body 16.

  The drive shaft main body 16 and the drive shaft coupling body 19 and the pair of drive shaft divided bodies 17a and 17b according to the present embodiment are coupled to each other through the coupling flanges 18, 25, and 32. For this reason, the overlapping surface of the drive shaft main body 16 and the drive shaft coupling body 19 and the pair of drive shaft divided bodies 17a and 17b is widened, so that a large number of coupling bolts 23 can be arranged, and the power of the towing vehicle can be increased. Each grooved ring W can be reliably transmitted.

  In the grooved wheel drive shaft device A of the present embodiment, the drive means (upper and lower chain gears 15 and 29 and the chain 34) are provided on the drive shaft body 16 on the side where the connecting collar 18 is provided (drive shaft connector). 19 is provided on the side where 19 is not inserted. For this reason, the power of the towing vehicle is directly transmitted to the drive shaft main body 16 (that is, each grooved wheel W) via the drive means. If the drive means is provided on the opposite side of the drive shaft body (the side where the drive shaft coupling body 19 is inserted), the power of the towing vehicle is transmitted via the drive shaft coupling body 19. . Here, since the drive shaft main body 16 and the drive shaft coupling body 19 are coupled by the shaft coupling pin 22, it is considered that there is a slight gap between the shaft coupling pin 22 and the pin insertion holes 16b and 24b. It is done. Then, the power of the towing vehicle is transmitted to the drive shaft main body 16 with a slight delay, and a “twist” is generated between the drive shaft main body 16 and the drive shaft coupling body 19 to reduce the transmission efficiency. However, in the grooved wheel drive shaft device A of the present embodiment, the drive shaft coupling body 19 is arranged on the non-transmission side of the power and is rotated together, so there is no possibility of reducing transmission efficiency. At the same time, the connection strength of the drive shaft transmission portion (the connection portion between the drive shaft main body 16 and the drive shaft coupling body 19) can be ensured. In other words, even a simple connection method in which the drive shaft main body 16 and the drive shaft connecting body 19 are simply connected by the shaft connecting pins 22 can withstand torsional stress generated between them.

  The technical idea of the invention described in claim 1 is also applicable to a side drive type “rotary tiller” having the following configuration. That is, it has a plurality of tilling claw units having the same configuration as the grooved ring of the above embodiment, and the tilling claw unit is directly fitted to the sleeve (mounting body) as a tilling claw unit fitted on the drive shaft body. The rotary tiller is configured so that the worn tillage claw cannot be replaced in a state where the tillage claw unit is attached to the drive shaft main body and is fixed integrally by a fastening means such as welding.

It is a side view of the non-tilling direct seeding machine to which the grooved wheel drive shaft device A of the present invention is attached. Similarly, it is a schematic plan view. It is the figure which looked at the grooved wheel drive shaft apparatus A from the front of the advancing direction. 2 is a perspective view of a state where a drive shaft main unit U of a grooved wheel drive shaft B is separated from a machine body K. FIG. It is an exploded view of the grooved wheel drive shaft B. It is sectional drawing of the part of the drive shaft division body 17a by the side of a drive. It is the XX sectional view taken on the line of FIG. It is the perspective view which fractured | ruptured a part of other end part of the grooved wheel drive shaft B. FIG. It is sectional drawing of the part of the drive shaft division body 17b of a driven side. FIG. 4 is a perspective view of a state in which a drive shaft main body 16 and a drive shaft coupling body 19 are separated. 4 is a cross-sectional view of a connection portion between a drive shaft main body 16 and a drive shaft connecting body 19. FIG. It is a figure which shows the state in which ten grooved wheels W are attached to the drive shaft main body 16 by reversing left and right. (A) and (B) are enlarged cross-sectional views showing a state of wear of the conventional grooved ring W ′ at the start of use and after use for a predetermined time. (A) and (B) are enlarged cross-sectional views showing a state where the seed S is dropped in the sowing groove V. FIG. It is a figure of the state which isolate | separates the grooved wheel drive shaft 51 in the conventional grooved wheel drive shaft apparatus A '.

Explanation of symbols

A: Grooved wheel drive shaft device
B: Grooved wheel drive shaft
K: Aircraft
P: Mounting interval (predetermined interval)
V: Sowing groove
W: Groove ring
8: Side frame
16: Drive shaft body 17a, 17b: Drive shaft divided bodies 18, 25, 32: Connecting flange
19: Drive shaft coupling body
24: Connecting shaft (short shaft)
31: Stepped shaft (short shaft)
37, 38: Curved disk (groove ring body)
41: Mounting body

Claims (4)

Immediately after grooving in the multiple sowing grooves that are cultivated in the field by a large number of grooving wheels mounted at predetermined intervals on the grooving wheel drive shaft supported in the width direction of the machine body, pulled by a towing vehicle In the no-tillage direct sowing machine configured to sow directly on
The grooved wheel drive shaft is a drive shaft body in which a large number of grooved wheels are integrally attached with a predetermined interval in an externally fitted state, and a connecting collar is integrally attached only to one end in the axial direction;
A connecting collar is integrally attached only to the inner end of the short shaft body, and is supported opposite to the inside of the lower ends of a pair of side frames provided opposite to both ends in the width direction of the machine body. A pair of drive shaft split bodies,
A connecting hook is integrally attached only to the outer end of the short shaft, and the short shaft is inserted into the end opposite to the connecting hook of the drive shaft main body and attached to the drive shaft main body. A drive shaft coupling body,
One end of the drive shaft main body is connected to one drive shaft divided body via a connecting collar, and the other end of the drive shaft main body is connected to the other drive shaft divided body via the drive shaft connected body. A grooved wheel drive shaft device for a no-tillage direct sowing machine. The drive shaft coupling body inserted into the end portion of the drive shaft main body is connected to the drive shaft main body integrally with a grooved ring fitted around the end portion. The grooved wheel drive shaft device of the described no-tillage direct sowing machine. The connecting rod part integrally attached to the drive shaft main body is disposed on the drive side, and is integrally connected to the connecting rod part of the drive shaft divided body on the drive side. The grooved wheel drive shaft device of the described no-tillage direct sowing machine. The grooved ring is a configuration in which the grooved ring main body is integrally attached at a position shifted in the axial direction with respect to the center in the longitudinal direction of the attachment body that is externally fitted to the drive shaft main body,
A large number of grooved wheels that are externally fitted to the drive shaft main body are externally fitted to the left and right sides of the central portion in the axial direction of the drive shaft main body in a state of being reversed left and right. A grooved wheel drive shaft device for a no-tillage direct sowing machine according to any one of claims 1 to 3.

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