JP3297315B2 - Riding transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of riding transplanters such as riding rice transplanters.

[0002]

2. Description of the Related Art In general, in a planting section of this type of riding transplanter, a planting drive shaft is provided at a position parallel to a planting section frame, and an input is transmitted to the planting drive shaft via an input gear mechanism. The power is transmitted to the planting mechanism, but the power of the planting drive shaft is
Since the seedling pedestal is also distributed to the seedling pedestal lateral feed shaft via the traverse feed drive mechanism, the seedling pedestal operates laterally at a speed corresponding to the planting timing.

[0003]

However, in the prior art, the input gear mechanism, the traverse transmission mechanism, and the seedling mounting traverse feed shaft are incorporated in a single drive case. The intermediate transmission shaft (the power of the planting drive shaft taken out at the center of the case is not And the drive case is mounted at a substantially central position of the planting section frame, so that the transverse feed mechanism is provided at the side of the planting section. There is an inconvenience that it is located near the center and is inferior in operability at the time of a lateral feed shift.

[0004]

SUMMARY OF THE INVENTION The present invention has been made with the object of providing a riding transplanter which can solve these problems in view of the above-mentioned circumstances, and comprises a plurality of planter cases. A planting drive shaft for transmitting the power input from the input gear mechanism to the planting mechanism is disposed at a parallel position of the planting section frame to which the planting section frame is attached, and the power of the planting drive shaft is transmitted to the lateral feed transmission mechanism. In the riding transplanter which is also distributed to the seedling table transverse feed shaft via the input gear case in which the input gear mechanism is incorporated, and the transverse feed case in which the transverse feed mechanism is incorporated, are separated from each other. When attaching each to the planting section frame, the planting drive shaft
At the rear lower position of the planting section frame.
The input gear case
The power output from the output shaft of the
Input to the input shaft supported on the front end of the planter case
Arranged so as, arranged transverse feed transmission mechanism, so that the input shaft of the lateral feed transmission mechanism is positioned on the axial line of the planting drive shaft, and located outside the planter case of outermost lateral Feeding
Connect the input shaft of the transmission mechanism to the outermost planter case.
A riding transplanter connected to the implant drive shaft using a shaft . In other words, since the conventional drive case is divided into an input gear case and a transverse feed case and attached to the planting section frame, the case member can be reduced in size and the working section can be reduced in weight. In addition, power can be input to the transverse feed mechanism without passing through the intermediate transmission shaft, so that the number of parts can be reduced and the structure can be simplified.

Further , since the transverse feed mechanism can be arranged at a position lateral to the planting drive shaft , the transverse feed mechanism can be arranged at a position deeper than the planting portion, as compared with the conventional case where the transverse feed mechanism is arranged at a position deep in the planting portion. The operability at the time of shifting can be improved. Moreover,
The planted drive shaft can also be used as the input shaft of the transverse feed mechanism, so the number of parts can be reduced and the structure can be simplified. There is an advantage that it can be supported in a two-sided manner with the feed transmission case.

[0006]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine of a riding rice transplanter, and a planting section 3 is mounted on a rear portion of the traveling machine 1 via a lifting link mechanism. The planting section 3 includes a holder frame 4 detachably attached to the elevating link mechanism 2, a planting section frame 6 supported on the holder frame 4 via a rolling support shaft 5 so as to be tiltable left and right, A seedling mounting table 8 slidably supported on a seedling mounting support stand 7 standing upright from the planting section frame 6, a planting arm 9 for scraping planted seedlings from the seedling mounting table 8 and planting them on the rice field, Although it is composed of a sliding float 10 and the like, each of these basic configurations is the same as the conventional one.

The planting section frame 6 is disposed below the planting section 3 so as to face left and right, and various members are assembled in addition to the rolling support shaft 5 and the seedling support stand 7. However, in the present embodiment, the planting section frame 6 is formed using a square pipe (each tubular member) having a substantially square cross section, and a central portion of each peripheral surface (a front surface, a rear surface, an upper surface, and a lower surface) is formed. A mounting groove (fixing metal locking groove) 6a is formed over the entire length, which can lock (lock and lock) a fixing metal such as the nut 11 at an arbitrary position in the longitudinal direction.
That is, the mounting groove 6a includes a locking portion (retaining portion) 6b forming both groove edges, a pair of groove side portions (rotation stopping portion) 6c extending inward from the locking portion 6b to the pipe, A groove bottom portion 6d connecting the groove side portions 6c to each other, and
When the nut 11 is mounted in the mounting groove 6a from the longitudinal end face, the mounted nut 11 is allowed to slide in a state where the nut 11 is prevented from being pulled out by the locking portion 6b and is stopped by the groove side portion 6c. Therefore, by screwing the bolt 12 into the nut 11, various members can be attached to an arbitrary position in the longitudinal direction of the planting section frame 6.

[0008] t1 is the thickness of the square pipe constituting the planting part frame 6, and the thickness t1 is set in consideration of the required overall strength. Only the thickness t2 (t2> t1) of the portion 6b is set to be larger than the entire thickness t1. That is, the required strength is ensured by making the locking portion 6b on which a large bending stress acts acts thick, but only the locking portion 6b is set to t2 without setting the entire thickness dimension to t2. The overall thickness is made as thin as possible to reduce the weight of the planting section frame 6.

Reference numeral 6e denotes a reinforcing portion of the square pipe constituting the planting portion frame 6, and the reinforcing portion 6e integrally connects the groove bottom portions 6d of the adjacent mounting grooves 6a to form a planting portion frame. 6, an inner pipe continuous in the circumferential direction is formed. That is, since the double pipe structure having excellent strength is utilized by using the groove bottom 6d, the thickness can be reduced while securing the necessary strength, and the weight of the planting section frame 6 can be further reduced. ing.

The reinforcing portion 6e and the outer peripheral portion 6
The corner of f is formed in a rounded R shape, and the R diameter of the outer peripheral portion 6f is set as small as possible, while the R diameter of the reinforcing portion 6e is set as large as possible. Therefore, the outer peripheral portion 6
In (f), the contact area with the mounting member is made as large as possible to increase the mounting strength of the member, while in the reinforcing part 6e, the cross-sectional area is made as small as possible to reduce the weight of the planting part frame 6. Is to be measured.

Reference numeral 6g denotes a through hole formed at the center of the planting section frame 6 in the left and right direction and at the center of the up and down direction so as to face in the front-rear direction. However, in consideration of the outer diameter d1 of the rolling support shaft 5 inserted into the through hole 6g in advance, the groove width d2 of the mounting groove 6a is set to d1 or more. ing. In other words, since the through-hole 6g can be formed without losing the groove side portion 6c of the mounting groove 6a, the rolling support shaft 5 is assembled through without substantially reducing the strength of the planting portion frame 6. You can do it.

Reference numerals 13 and 14 denote a pair of fixing plates for fixing the rolling support shaft 5. The pair of fixing plates 13 and 14 are provided on the front and rear surfaces of the planting portion frame 6, respectively. It is mounted using bolts 12 (and nuts 11 mounted in the mounting grooves 6a). The rolling support shaft 5 is inserted through the through holes 13a and 14a formed in the fixing plates 13 and 14, and the retaining ring 15 is fixed to the rear end surface of the rolling support shaft 5 by bolts to prevent the shaft from slipping forward. However, the rear end of the rolling support shaft 5 is formed in a non-circular cross section with both side surfaces cut, and the through hole 14 a of the rear fixed plate 14 is formed.
Is formed as a non-circular hole corresponding to the cross section of the rear end of the rolling support shaft 5, so that the rear support plate 14 can be used to stop the rolling support shaft 5 from rotating. Since the step formed between the circular portions abuts against the rear fixed plate 14 from the front, the rearward movement of the rolling support shaft 5 can also be restricted.

On the other hand, reference numeral 16 (16L, 16R) denotes a planting drive shaft arranged in parallel at the rear lower position of the planting section frame 6, and the planting drive shaft 16 is provided with the input gear mechanism 1
7, the PTO power input from the traveling body 1 is distributed to the planting power and the lateral feed power. The planting drive shaft 16 of the present embodiment has a non-circular cross section (6 in this embodiment). (Shape).

The input gear mechanism 17 includes an input shaft 18 for inputting PTO power from a PTO shaft (not shown) on the traveling body 1 via a connecting shaft (not shown), and the input shaft 18 integrally therewith. The driving bevel gear 19 that rotates, the driven bevel gear 20 that always meshes with the driving bevel gear 19, rotates integrally with the driven bevel gear 20, and the planting drive shaft 16 is inserted into a hexagonal hole 21 a in the middle of the inner periphery. The input gear mechanism 17 is composed of a cylindrical output shaft 21 and the like which is inserted so as to be rotatable integrally. 6 alone. That is, since the input gear mechanism 17 conventionally incorporated in a large drive case is incorporated in the independent input gear case 22, it is possible to reduce the size of the case member to reduce the weight of the planting portion 3. The occupied width of the input gear case 22 on the drive shaft 16 can be reduced so that the mountable range of a planter case 23 described later can be expanded. Reference numeral 24 denotes a mounting bracket for the input gear case 22, and the mounting bracket 24
It is attached to the attachment groove 6 a of the planting section frame 6 using the bolts 12 and 1.

The planter case 23 has a pair of left and right planting arms 9 on the left and right sides of the rear end, and a single planting arm 9 on one of the right and left sides of the rear end. However, since the planting section 3 of the present embodiment is a six-row planting specification, the former three planter cases 23 are provided at predetermined intervals in the left-right direction.

Each of the planter cases 23 has a tubular input shaft 25 pivotally supported to the front end side in the left-right direction, a planting arm drive shaft 26 pivotally supported to the rear end side in the left-right direction,
A drive-side sprocket 28 interlockingly connected to the outer periphery of the input shaft 25 via a locking clutch mechanism 27, a driven-side sprocket 29 integrally provided on the outer periphery of the planting arm drive shaft 26, and between the two sprockets 28, 29 A transmission chain 30 and the like to be suspended are incorporated. That is, power is input from the planting drive shaft 16 in which the input shaft 25 is integrally rotatably inserted into the hexagonal hole 25a in the middle of the inner circumference, and the input power is transmitted to the strut clutch mechanism 27 and the driving sprocket 28. The transmission is transmitted to the left and right planting arms 9 via the transmission chain 30, the driven sprocket 29, and the planting arm drive shaft 26. In this embodiment, the front end face of the planter case 23 main body is opened. The weight of the planter case 23 can be reduced by the omission of the wall.

Reference numeral 31 denotes a mounting bracket which is assembled to each planter case 23 so as to cover the front end opening. The mounting bracket 31 is provided at a predetermined position of the planting section frame 6 (for each specification having a different number of planting strips). It is attached to the set planter case attachment position) using the bolts 12 and the nuts 11. That is, since each of the planter cases 23 is directly attached to the planting section frame 6 without connecting and supporting the plurality of planter cases 23 via the shaft case 32 that covers the planting drive shaft 16, the processing of the shaft case 32 is performed. Since there is no variation in the position of the planter case 23 due to errors or the like, and it is not necessary to handle the shaft case 32 as a support member, the shaft case 32 is formed of a thin general-purpose pipe member, and the planting portion 3 is formed.
Can be lightened. Moreover, since the planting section frame 6 to which each planter case 23 is mounted has the mounting groove 6a in which the planter case 23 can be mounted at an arbitrary position in the longitudinal direction, the mounting of the planter case 23 to the planting section frame 6 is performed. The position and the number of attachments can be set arbitrarily. As a result, many parts such as the planter case 23, the input gear case 22, and the planting part frame 6 in the planting parts 3 having different specifications (number of planting strips, etc.). Can be standardized, and significant cost reduction can be achieved.

The mounting bracket 31 includes a first mounting portion 31a which contacts the rear surface of the planting portion frame 6,
A second mounting portion 31b which comes into contact with the lower surface of the planting portion frame 6 is integrally formed, and both mounting portions 31a, 31b are respectively fixed to the mounting grooves 6a by bolts. In addition to distributing the stress acting on the mounting bracket 31, the supporting strength of the planter case 23 can be increased, and the required strength of the mounting bracket 31 can be made as small as possible to reduce the weight and size of the mounting bracket 31. It has become. In the present embodiment, each of the mounting portions 31a and 31b is formed of a separate member, and both members are integrally connected by bolts or the like. However, both members may be integrally formed in advance. In the former, there is an advantage that the mounting error due to the processing variation of the planter case 23 can be corrected by adjusting the positional relationship between the two members,
The latter has the advantage that the number of parts can be reduced.

On the other hand, reference numeral 33 denotes a seedling table lateral feed shaft arranged in parallel above the planting drive shaft 16, and the outer peripheral surface of the seedling table lateral feed shaft 33 has two different directions. Spiral groove 33 of
a is engraved, and a slide piece 34 meshing with the spiral groove 33a is fitted outside. Further, since the slide piece 34 is connected to the seedling mounting table 8 in a rotation-restricted state, the power of the planting drive shaft 16 is transmitted to the seedling mounting table horizontal feed shaft 33 via a lateral feed transmission mechanism 35 described later. When transmitted,
The slide piece 34 reciprocates left and right with the one-way rotation of the seedling mounting table lateral feed shaft 33, and the seedling mounting table 8 is configured to perform a lateral feeding operation following the movement. Reference numeral 36 denotes an elastic bellows boot that covers the seedling table horizontal feed shaft 33, and 37 denotes a seedling table 8.
Is a vertical feed lever that operates a vertical feed mechanism 38 provided at a predetermined timing.

The traverse transmission mechanism 35 includes a planting drive shaft 1.
6, an input shaft 39 for inputting power from the input shaft 6, a plurality of drive-side transmission gears 40 rotatably arranged side by side on the outer periphery of the input shaft 39,
A connection ball 42 for rotating a corresponding drive-side transmission gear 40 in conjunction with the input shaft 39 based on an operation of a first slide shaft 41 provided inside the input shaft 39;
A plurality of driven side transmission gears 43 always meshing with each other, an intermediate shaft 44 integrally provided with the driven side transmission gears 43,
A pair of transmission gears 45 and 46 for transmitting the rotation of the intermediate shaft 44 to the seedling table lateral feed shaft 33, a second slide shaft 48 integrally connected to the first slide shaft 41 via a connection plate 47, A shifter cylinder 50 mounted on the slide shaft 48 via a bullet 49, and a shifter fork 5
1 and a transverse feed lever 52 and the like that are connected to each other. That is, the power input to the input shaft 39 is shifted between the drive-side transmission gear 40 selected by the operation of the lateral feed transmission lever 52 and the driven-side transmission gear 43 that always meshes with the drive-side transmission gear 40. After the rotation, the power is transmitted to the seedling table lateral feed shaft 33 via the intermediate shaft 44 and the transmission gears 45 and 46. Reference numeral 53 denotes a rotation restricting wheel rotatably supported by the input shaft 39. The rotation restricting wheel 53 receives rotation restriction by the ball 54 in a neutral state, and applies the rotation restriction force to the intermediate gear 55. Since the transmission is transmitted to the seedling table lateral feed mechanism 33 via the seedling table, it is possible to prevent the disadvantage that the seedling table lateral feed shaft 33 rotates during the speed change operation and the timing adjustment is out of order.

The traverse transmission mechanism 35 is incorporated in an independent traverse transmission case 56 and is located at a predetermined position of the planting section frame 6 (an attachment position set for each specification having a different number of planting strips). It can be installed alone. That is, the traverse transmission mechanism 35 conventionally incorporated in a large drive case is replaced by an independent traverse transmission case 5.
6, it is possible to reduce the size of the case member and reduce the weight of the planting portion 3, or the transverse feed mechanism 35 can be easily shared between planting portions having different specifications. Moreover, since the transverse feed mechanism 35 can be arranged separately from the input gear mechanism 17, the power of the planting drive shaft 16 can be input to the transverse feed mechanism 35 without passing through the intermediate shaft. I have. Reference numeral 57 denotes a mounting bracket for the transverse feed transmission case 56,
7 is attached to the attachment groove 6a of the planting portion frame 6 using the nut 11 and the bolt 12.

In arranging the transverse feed case 56, the input shaft 3 is positioned on an extension of the center axis of the planting drive shaft 16.
9 is located, and the input shaft 3 is set.
9 is connected to the planting drive shaft 16 using the input shaft 25 of the planter case 23. That is, since the lateral feed transmission case 56 is disposed on one side of the planting drive shaft 16, it is possible to easily operate the lateral feed transmission lever 52 on the side of the planting section 3 or not. 23
The input shaft 25 can also be used as a shaft coupling to reduce the number of parts.

In the structure configured as described above, the planting section 3 is constructed by attaching various members to the planting section frame 6. The planting section frame 6 has a rectangular cylindrical shape. The nut 1 is placed on the outer peripheral surface at an arbitrary position in the longitudinal direction.
1 is formed, so that the input gear case 22, the planter case 23, the transverse feed case 56
And the like can be bolted to an arbitrary position in the longitudinal direction. Therefore, it is not necessary to weld the mounting bracket of each member to the planting portion frame 6 in advance, and the processing cost of the planting portion frame 6 can be reduced, or the influence of the processing error can be reduced, In addition, since the mounting position of the member can be arbitrarily changed, the planting portion frame 6 and the mounting member can be easily shared between the planting portions 3 having different specifications.

Further, since the groove bottoms 6d of the adjacent mounting grooves 6a are integrally connected via a reinforcing portion 6e to form an inner pipe continuous in the circumferential direction inside the planting portion frame 6, By using the groove bottom 6d, a double pipe structure excellent in strength can be obtained. As a result, it is possible to reduce the thickness of the planting section frame 6 by reducing the thickness while securing the necessary strength. As much as possible, the supporting strength of the mounting member can be increased.

In mounting the rolling support shaft 5 through the planting section frame 6, the groove width d2 of the mounting groove 6a is set to be equal to or larger than the diameter dimension d1 of the rolling support shaft 5. The through hole 6g can be machined without losing the groove side portion 6c of the groove 6a, and as a result,
The rolling support shaft 5 can be penetrated without substantially reducing the strength of the planting portion frame 6.

When the rolling support shaft 5 is fixed to the planting section frame 6 using a pair of front and rear fixing plates 13 and 14, the rear end of the rolling support shaft 5 is cut into a non-circular shape with both side surfaces cut. Since the through-hole 14a of the rear fixing plate 14 is formed as a non-circular hole corresponding to the cross section of the rear end portion of the rolling support shaft 5, the rolling support shaft 5 is rotated using the rear fixing plate 14. As a result, it is possible to avoid the necessity of providing a separate detent member or welding the rolling support shaft 5, or to avoid a decrease in dimensional accuracy due to welding.

Further, since the input gear mechanism 17 of the planting section 3 is incorporated into the independent input gear case 22 and the input gear case 22 is independently mounted on the planting section frame 6, the case member is downsized and planted. If the weight of the portion 3 can be reduced, the occupied width of the input gear case 22 on the planting drive shaft 16 can be reduced to reduce the planter case 2.
3 can be extended.

Also, since the plurality of planter cases 23 are respectively attached to the planting section frame 6, the processing of the shaft case 32 is performed in the same manner as in the conventional case where the plurality of planter cases 23 are connected and supported via the shaft case 32. It is possible to avoid the occurrence of variation in the position of the planter case 23 based on an error or the like, or it is possible to reduce the weight of the planting portion 3 by forming the shaft case 32 with a thin general-purpose pipe member. Since the planting section frame 6 to which the planter case 23 is mounted has the mounting groove 6a in which the planter case 23 can be mounted at an arbitrary position in the longitudinal direction, the mounting position and mounting of the planter case 23 with respect to the planting section frame 6. By setting the number arbitrarily, the planter case 23 and the input gear Over scan 22 can be made common to many components such as the planting unit frame 6.

Further, since the traverse transmission mechanism 35 is incorporated in an independent traverse transmission case 56 and the traverse transmission case 56 is independently mounted at a predetermined position of the planting section frame 6, the case member can be downsized. It is possible to reduce the weight of the planting part 3 by using the lateral feed transmission mechanism 35 between the planting parts having different specifications easily. Therefore, the power of the planting drive shaft 16 can be input to the lateral feed transmission mechanism 35 without passing through the intermediate shaft.

Further, since the traverse transmission case 56 is arranged so that the input shaft 39 is located on an extension of the axis of the planting drive shaft 16, the traverse transmission case 56 is connected to the plantation drive shaft 16.
It is possible to reduce the number of parts by using the input shaft 25 of the planter case 23 as a shaft coupling, as long as the operability of the lateral feed shift lever 52 can be improved by arranging it on one side.

The present invention is, of course, not limited to the embodiment described above.
6 can also be used as the input shaft 39 of the transverse feed mechanism 35. In this case, the number of parts can be reduced and the structure can be simplified. There is an advantage that it can be supported in a two-sided manner between the case 22 and the transverse feed case 56. The output shaft 21 of the input gear case 22 and the input shaft 2 of the planter case 23
5, a hexagonal hole 21a having a predetermined width
Although the planting drive shaft 16 is formed so as to be rotatable integrally with the planting drive shaft 25, the forming range of the hexagonal holes 21a and 25a can be set at both ends of the inner periphery. In this case, There is an advantage that the rattling of the inserted driving shaft 16 can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a riding rice transplanter.

FIG. 2 is a side view of the same.

FIG. 3 is a side view of the planting section.

FIG. 4 is a plan view of a main part of the planting section in which a seedling table horizontal feed shaft is omitted.

FIG. 5 is a sectional view of a main part of the planting section.

FIG. 6 is a rear view of a main part of a planting portion in which a planter case is developed downward.

FIG. 7 is a cross-sectional view of the planting section frame showing a mounted state of a rolling support shaft.

FIG. 8 is a cross-sectional view of the input gear case.

FIG. 9 is a sectional view of a planter case.

FIG. 10 is a cross-sectional view of a main part of the planter case showing a range in which a hexagonal hole is formed.

FIG. 11 is a cross-sectional view of a main part of the same, showing another example of a hexagonal hole forming range.

FIG. 12 is a side view of a main part showing an attached state of a planter case.

FIG. 13 is a side view of a main part showing another example of the mounting bracket.

FIG. 14 is a rear view showing a lateral feed transmission mechanism and a seedling table lateral feed shaft.

FIG. 15 is an internal side view of the lateral feed transmission case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 3 Planting part 5 Rolling spindle 6 Planting part frame 6a Mounting groove 6e Reinforcement part 13 Fixing plate 14 Fixing plate 16 Planting drive shaft 17 Input gear mechanism 22 Input gear case 23 Planter case 33 Seedling table lateral feed shaft 35 Transverse transmission mechanism 39 Input shaft 56 Transverse transmission case

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihiko Kato 667 Idaicho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture Inside Mitsubishi Agricultural Machinery Co., Ltd. 667 No. 1 Examiner, Mitsubishi Agricultural Machinery Co., Ltd. Tadayoshi Ono (56) References JP-A-6-327311 (JP, A) JP-A-2-245109 (JP, A) JP-A-4-325013 (JP, A) Japanese Utility Model Hei 5-82220 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/02 313-315 A01C 11/02 350-353

Claims (1)

(57) [Claims] 1. A planting drive shaft for transmitting power input from an input gear mechanism to a planting mechanism is disposed at a parallel position of a planting section frame to which a plurality of planter cases are attached, and the planting drive shaft is provided. , The input gear case in which the input gear mechanism is incorporated, and the transverse feed case in which the transverse feed mechanism is incorporated. And separate from each other,
To attach each case to the planting section frame, the planting drive shaft is located at the rear lower position of the planting section frame.
And input gear case and multiple planter cases,
Planting drive power output from the output shaft of the input gear case
Input supported from the shaft to the front end of multiple planter cases
Arranged so as to be input to the shaft, and the traverse transmission mechanism is arranged such that the input shaft of the traverse transmission mechanism is located on the axis of the planting drive shaft and is located outside the outermost planter case. Arranging the input shaft of the traverse feed mechanism to the outermost planter
A riding transplanter connected to the planting drive shaft using an input shaft of a case .