JP3394673B2 - Transmission structure of seedling planting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission structure in a seedling planting device of a rice transplanter, and more particularly to a power transmission structure from a feed case to a planting transmission case.

[0002]

2. Description of the Related Art In a seedling planting device, a structure in which power from the machine is first input to a feed case to form a horizontal feed or vertical feed transmission section of the seedling mount, and then power is transmitted to a plurality of plant transmission cases. It is common to adopt
FIG. 2 of Japanese Patent No. 153636 shows the outline of the transmission system.

[0003]

In the prior art disclosed in the above publication, the output shaft mounted at the end of the feed case and the input shaft of the three planted transmission cases have two relay shafts (reference numeral 17). ) And 5 couplings (no reference number) are interlockingly connected, and the feed case and the input shaft of the planting transmission case at the center closest to this are
It was directly coupled.

However, when a new planting device is newly designed by a new model or the like, as a result of rationally arranging the respective parts, the feed case and the central planting transmission case are arranged in close proximity to each other in the left-right direction. It may be done. Then, it becomes impossible to secure a space for arranging the coupling between the feed case and the planted transmission case as in the conventional case, and it becomes necessary to consider a new transmission structure. An object of the present invention is to obtain a transmission structure capable of transmitting power without inconvenience even in a layout in which a feed case and a planted transmission case are arranged close to each other to the extent that a coupling transmission structure cannot be adopted.

[0005]

[Means for Solving the Problems]

[Configuration] The first invention for the planting frame extending in the left-right, particularly support of the feed case a plurality of planting transmission case
So, an output shaft of the feed case, and an input shaft of the planting transmission case that is closest in the horizontal direction and the feed case constitutes the shared axis of the series integral, the shared axis, the feed case or the It can be inserted into and removed from the planted transmission case freely and can be inserted into the feed case.
And the boss portion surrounding the common shaft and the planted transmission case.
Over the boss portion surrounding the common shaft in the base,
Fit the inner or outer diameter of both bosses in a watertight condition.
Connect the pipe members in the state in which they are installed, and connect / disconnect the common shaft.
The feed cases or the planting transmission case side to be
To the boss part where the pipe member is fitted and mounted.
The power transmission ring supported by the common shaft.
A bearing that rotatably supports the common shaft only at the opposite side position.
It is characterized by being equipped with a ke .

According to a second aspect of the present invention, in the first aspect of the present invention, transmission wheels are fitted to the output shaft and the input shaft such that they cannot rotate relative to each other.
The hub portion of the wheel body is engaged by the boss portion on the case side so that free movement in the radial direction of the ring body on the side where the common shaft is pulled out and inserted is regulated when the common shaft is not inserted therein. It is characterized by being supported.

[Operation] According to the structure of claim 1, since the output shaft of the feed case and the input shaft of the planted transmission case are commonly used by one common shaft, a conventional coupling or the like is connected. Since it is no longer necessary to provide a member, it is possible to dispose the feed case and the planted transmission case closer to each other.
However, if the transmission structure between the shared shaft and each case remains the same as before, the feed case and the planted transmission case will also be integrated when the shared shaft is installed, which is extremely disadvantageous for assembly work and transportation. It becomes a big ASSY part and it is not realistic.

Therefore, since the common shaft can be inserted into and removed from the feed case or the planted transmission case, the feed case and the planted transmission case can be separated from each other in the conventional manner with the common shaft attached to either of them. It can be handled as an ASSY part. Therefore, it is possible to realize a structure in which the feed case and the planted transmission case are arranged close to each other without causing the disadvantages described above.

The ring hub on the side where the common shaft is inserted / removed is restricted by the boss portion on the case side so that free movement in the radial direction is restricted when the common shaft is not inserted therein. Since the parts are engaged and supported, even if the shared shaft is pulled out, the ring body will be present in the vicinity of the normal position where the shaft is inserted, and the ring body will be slightly displaced or moved. Instead, the common shaft can be pierced. Further, as a means therefor, it is sufficient to devise such that the boss portion on the case side and the hub portion of the ring body are set to have the same diameter dimension, which is convenient in terms of structure and cost.

Since both the feed case and the planted transmission case are supported by the planted frame, the support portions of the common shaft in each case may not always be aligned in a straight line in terms of accuracy. Therefore, by equipping the case on the side where the shared shaft is inserted / removed with only one bearing, even if there is a slight misalignment of the shaft axis, it will be easier to absorb it due to inclination due to dimensional errors, and smooth rotation operation Will be able to appear. For example, in a structure in which two bearings are used to support a shared shaft on both sides, it is almost impossible to tolerate misalignment of the shaft centers of the cases, and the rotation is heavy, which deteriorates the durability of the bearings and the loss of horsepower. However, the configuration of the present invention is advantageous because there is almost no such concern.

Further, the open portions of the cases arranged close to each other are connected and closed by a pipe member which is fitted in the inner diameter or the outer diameter of the boss portion of each case in a water-sealed state. As a result, it is possible to prevent the lubricating oil from leaking inside the case and prevent foreign matter from entering the case from outside the case. Since each case is a fixed object, there is no need for a relatively sophisticated water-sealing component such as a general seal member for the rotating shaft, and since it is not a strength member, an inexpensive and simple pipe member is sufficient. Is advantageous.

According to the second aspect, it has the following effects. That is, since the transmission wheel body such as the sprocket and the gear is supported by the shaft to maintain its position, the wheel body on the side where the shared shaft is removed loses the supporting function of the shaft. Therefore, when trying to penetrate the common shaft again, it is conceivable that the wheel body easily moves such as tilting or moving in the case, making it impossible to re-insert it.

[Effect] In the power transmission structure according to the first and second aspects, by devising the one output shaft of the feed case and the input shaft of the planted transmission case by a single shaft that can be inserted into and removed from the case on one side, The layout of the seedling planting device in which the feed case and the planting transmission case are closer to each other than in the past has been possible.

Further, the bearing on the side of the case that the shared shaft is inserted and removed, by a general scheme for the one reduced one compared to axially supported structure, the input of the output shaft and the planting transmission case of feed case Even if there is some misalignment with the shaft, it is now possible to provide a smooth rotation operating state.

Further, by utilizing the close proximity of the feed casing and planting the transmission case it could be reasonable that allows the sealing of the two cases in a shared axis extraction part Easy inexpensive structure.

In the power transmission structure according to the second aspect of the present invention, the reproducibility of the insertion / removal operation of the common shaft and the wheel body can be ensured by a simple structural device for restricting the displacement of the wheel body with respect to the case.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a 6-row rice transplanter, 1 is a body, 2 is a lifting link mechanism, 3 is a planting section, E is an engine, 5 is a belt transmission mechanism, 6 is a front mission,
7 is a front wheel, 8 is a rear wheel, 9 is a planting mechanism, and 10 is a feed case. As a transmission system, a front transmission 6 to which engine power is input drives the front wheels 7, and a transmission shaft 11 extending rearward therefrom drives a rear transmission 12 to drive rear wheels 8. Further, the PTO transmission shaft 13 extending rearward from the front mission 6 inputs it to the feed case 10 via the interlocking shaft 14 to drive the planting mechanism 9.

Next, the transmission structure of the feed case 10 will be described. As shown in FIG. 4, the feed case 10
The vertical transmission shaft 15 that is interlocked with the interlocking shaft 14 and receives the PTO power, the input shaft 16 that is interlocked with the vertical transmission shaft 15 via the bevel gear interlocking mechanism B, and the lateral feed across the input shaft 16. The lateral feed shaft 17 constituting the gear shift mechanism C,
Further, as shown in FIG. 3, an output shaft 19 for transmitting power to each of the planted transmission cases 18 is provided. Feed case 1
0 is bolt-supported by a square-planted frame F made of square pipe, and three planted transmission cases 18, 18, 18 are also bolt-supported by the planted frame F.

The input shaft 16 has a bearing 20 at one end thereof.
Is directly supported by the feed case 10, and the other end is supported by the bearing 2 with a passive gear 21 fitted outside.
2 is supported by the feed case 10. or,
A drive sprocket 23 for chain-linking the output shaft 19 is provided between the passive gear 21 and the lateral feed gear speed change mechanism C.

The lateral feed shaft 17 has a drive shaft 24 which meshes with the above-mentioned passive gear 21 fitted in one end thereof in an integrally rotating state, and a helical shaft for reciprocally laterally feeding the seedling placing table 4 at the other end. A coupling 26 for interlocking driving of the bearing 25 is fitted, and the other end is attached to the bearing 2 via a spiral shaft 25.
It is supported by 7.

The lateral feed gear speed change mechanism C constantly meshes four drive gears 28 to 31 fitted to the input shaft 16 and four driven gears 32 to 35 fitted to the lateral feed shaft 17. A shift mechanism si having a shift key structure is provided which is arranged in a state and selects only one of the drive gears to rotate integrally with the input shaft 16. That is, a long key groove 16a is formed on the input shaft 16, and engaging grooves 28a to 31a are formed on the drive gears 28 to 31, respectively, and a key 37 to be shifted by the shifter 36 is engaged in the key groove 16a. Key 3
A convex portion 37a that engages only with any one of the engaging grooves 28a to 31a is formed at the tip of 7, and the convex portion 37a is engaged by pushing or pulling the shift shaft 38. groove,
For example, if it is located in the first engagement groove 28a, the first speed drive state is revealed.

The above-mentioned passive gear 21 has a shaft portion 21A.
Is formed as a cylindrical shaft and protrudes outside the feed case 10, and a vertical feed shaft 39 for driving the vertical feed mechanism can be key-fitted inside the protruding shaft portion 21a. The input shaft 16 is relatively rotatably fitted into the inner portion of the feed case 10 of the shaft portion 21A, and the inner space of the shaft portion 21A is located at a portion between the input shaft 16 and the vertical feed shaft 39. A partitioning shield member 40 is provided. The shielding member 40 is composed of a lid that is press-fitted and fitted into the shaft portion 21A to prevent the lubricating oil from leaking out in the feed case 10.

As shown in FIGS. 2, 4 and 8, the vertical feed shaft 39 interlocking with the passive gear 21 has a pair of drive arms 4 for kicking the driven arm 42 of the vertical feed mechanism 41.
Equipped with 3. The drive arm 43 bends a steel plate into a U-shape, supports the roller 44 on both sides of the open end side of the pin 45, and tightens a bolt 46 inserted on the bend side to attach the roller 44 to the vertical feed shaft 39. It is fixed. The vertical feed shaft 39 is formed with a recess 39a for the bolt 46, and has a structure in which the bolt 46 is tightened and is not displaced in the axial direction. The spiral shaft 25 projects to the side opposite to the vertical feed shaft 39 with respect to the feed case 10, and allows the rotation trajectory of the drive arm 43 and the spiral shaft 25 to interfere with each other in a side view.

By the way, in the lateral feed gear speed change mechanism C,
Since it is necessary to enable the shift operation only when the seedling mounting table 4 is located at the stroke end of the lateral feed (a known technique, detailed description thereof will be omitted). Therefore, in this structure, four engaging grooves are provided. 28a to 31a have four speed ratios so that they are aligned in a straight line only in the transverse feed stroke end state, and the posture of the drive arm 43 is constant in the transverse feed stroke end state. It is also being done.

That is, the seedling mounting table 4 is set to move laterally from end to end when the spiral shaft 25 rotates exactly 13 times, and in the lateral feed gear speed change mechanism C, the gear ratios of the first to fourth speeds are First speed: 30/13 Second speed: 22/11 Third speed: 20/13 Fourth speed: 16/13, and reduction ratio of drive gear 24 and passive gear 21 is set to 26/18 = 13/9, respectively. ing.

Therefore, the number of rotations of each drive gear 28 to 31 when the spiral shaft 25 rotates 13 times is as follows: 1st speed drive gear 28: 13 × 30 ÷ 13 = 30 rotations 2nd speed drive gear 29: 13 × 22 ÷ 11 = 26 rotations 3rd speed drive gear 30: 13 × 22 ÷ 13 = 20 rotations 4th speed drive gear 31: 13 × 16 ÷ 13 = 16 rotations, both of which are integral multiples, and the key 37 is shifted. It can be moved freely. When the spiral shaft 25 rotates 13 times, the vertical feed shaft 39 has a vertical feed shaft 39: 13 × 9 ÷ 13 = 9 rotations, which is also an integral multiple of the number of rotations. The drive arm 43 always takes the same posture.

Next, the transmission structure of the feed case 10 and the planted transmission case 18 at the center will be described. As shown in FIGS. 3 to 6, the output shaft 50 at the end of the feed case 10
A driven sprocket (an example of a wheel r) 47 that is chain-linked to the drive sprocket 23 is key-connected and fitted to a, and a drive sprocket (wheel r) is attached to the input shaft 50b of the planted transmission case 18. (For example) 48, and a fixed position stop type ridge clutch A having a known structure. That is, the clutch body 51 is biased by the spring 49 toward the clutch engagement side, the clutch disc 52 is integrally rotated with the drive sprocket 48 in a ball engagement state, and the winding spring 53 is biased by the drive sprocket 48 toward the clutch disc 52. Etc. are fitted on the input shaft 50b, and only the clutch body 51 is fitted on the input shaft 50b in an integrally rotating state.

The output shaft 50a of the feed case 10 and the input shaft 50b of the planted transmission case 18 are integrally formed as a common shaft 50. The common shaft 50 can be freely inserted into and removed from the feed case 10. It has penetrated. That is, the driven sprocket 47 and the common shaft 50 rotate integrally by key interlocking, but they are positioned on only one side in the axial direction, and are shared by moving the feed case 10 relatively to the right in FIG. It is possible to remove the shaft 50. Then, the left and right boss portions 10a, 10a on the feed case 10 side are laterally extended so that the driven sprocket 47 is restricted from freely moving in the radial direction when the common shaft 50 is not inserted therein. The hub portions 47a, 47a of the driven sprocket 47 are engaged and supported by.

The right case 1 forming the feed case 10
Of the 0R and the left case 10L, only the boss portion 10a of the right case 10R has a ball bearing (an example of a bearing) 54.
The bearing is omitted in the left case 10L. The common shaft 50 is supported by a pair of left and right ball bearings 55, 55 in the planted transmission case 18. The inner diameters of the left and right boss portions 10a, 10a are equal to those of the hub portions 47a, 4a.
Since it is slightly larger than the outer diameter of 7a, the common shaft 50
Even if the driven sprocket 47 is pulled out, the driven sprocket 47 cannot move to the right by the ball bearing 54, but only slightly moves to the left until the sprocket portion 47b and the boss portion 10a come into contact with each other. Is almost immobile. Therefore, when the common shaft 50 is inserted into the feed case 10, the driven sprocket 47 can also be penetrated.

As shown in FIG. 5, the boss portion 10a and the boss portion 18a surrounding the common shaft 50 in the planted transmission case 18 are fitted in the inner diameters of both boss portions 10a, 18a in a water-sealed state. The pipe member 56 in the state of being connected is erected and connected so as to seal the inside and outside of the feed case 10 and the planted transmission case 18, respectively. That is, the seal member is conventionally press-fitted into the portion where the pipe member 56 is fitted, and one inexpensive pipe member and an inexpensive seal ring 61 are used instead of the two relatively expensive seals. There is an advantage that only two are required.

By the way, the common shaft 50 and the left and right planted transmission cases 18, 18 are interlockingly connected by a relay shaft 57 and a coupling 58 as in the conventional case, and a cylindrical cover 59 for covering the rotating portion is installed. There is. Also, shared shaft 5
When 0 is inserted in the feed case 10, the driven gear 47 is set at a predetermined position in the left-right direction by the snap ring 60 and the ball bearing 54. A jump clutch D is formed on the side of the ridge clutch A, and when the drive load of the planting mechanism 9 becomes larger than a predetermined value, the drive sprocket 48 that is ball-engaged with the clutch disc 52 is wound by a winding spring. It moves to the right in FIG. 5 against the urging force of 53, and the integrated rotation state with the clutch disc 52 is released.

[Other Embodiments] As shown in FIG. 7, the pipe member 56 is a tubular member having a two-layer structure of a metal base portion 56a and a seal portion 56b such as rubber, and the seal portion 56b is a boss. Parts 10a, 18
It fits into a. The fitting position may be either the boss inner fitting structure shown by the solid line or the boss outer fitting structure shown by the phantom line. Alternatively, the structure may be such that both boss portions 10a and 18a are directly fitted and the pipe member 56 is omitted.

[Brief description of drawings]

[Figure 1] Side view of rice transplanter

[Figure 2] Side view of the planting part

FIG. 3 is a diagram showing a transmission structure to a planted transmission case.

FIG. 4 is a development view showing a power transmission structure in a feed case.

FIG. 5 is a cross-sectional view showing a connection structure between the feed case and the central transmission case.

FIG. 6 is a cross-sectional view showing a state where the common shaft is pulled out from the feed case.

FIG. 7 is a cross-sectional view showing another structure of the pipe member.

FIG. 8 is a side view showing a vertical feeding mechanism.

[Explanation of symbols]

10 feed cases 10a boss part 18 Planted transmission case 18a Boss part 47a hub part 50 shared axes 50a output shaft 50b input shaft 54 bearing 56 Pipe member F Planted frame r wheel

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-153636 (JP, A) JP-A-4-51807 (JP, A) Actually open Sho 63-85023 (JP, U) Actually open 5- 98211 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01C 11/02

Claims (2)

(57) [Claims] 1. A for the planting frame extending in the left-right, particularly support of the feed case a plurality of planting transmission case
So, an output shaft of the feed case, and an input shaft of the planting transmission case that is closest in the horizontal direction and the feed case constitutes the shared axis of the series integral, the shared axis, the feed case or the with penetrating freely inserted into and removed from the planting transmission case, a boss which surrounds the common axis of the feed case
Surround the part and the common shaft in the planted transmission case.
The inner diameter or outside of these bosses.
A pipe member that fits in a water-sealed state is erected and connected to the diameter
And the feed case of side where the common shaft is inserted and removed also
Fits the pipe member to the planted transmission case
Power that is supported on the common shaft for the boss part
Rotate the shared shaft only to the opposite side of the transmission wheel.
The transmission structure of the seedling planting device equipped with a bearing that supports it freely . 2. A ring body for transmission is fitted to the output shaft and the input shaft so as not to rotate relative to each other, and the ring body on the side where the common shaft is inserted and removed is not inserted with the common shaft. 2. The transmission structure of the seedling planting device according to claim 1 , wherein the hub portion of the ring body is engaged and supported by the boss portion on the case side so that free movement in the radial direction is restricted in this state.