JPH11206210A - Transverse transmission mechanism in rice plant transplantation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit accurate transmission operation with reduced operation error of the shift arm without occurrence of looseness or the like for a long period of time by forming the boss interlocking to the shift arm and the slide key separately and allow them to integrally work without their mutual rotation, in the transverse transmission mechanism in a rice plant transplanter where the transmission is effected by selectively connecting a slide key fitted to the key groove on the gear shaft to the group of idly rotating transmission gears using the boss interlocking to the shift arm operation. SOLUTION: The boss 38 interlocking to the shift arm is outfitted to the gear shaft 24 equipped with the slide key 36 and the projection 41 formed on the slide key 36 is fitted to the connection groove 40 formed on the boss 38. Thus, the slide key 36 and the boss 38 can be integrally operated by the slide operation of the shift arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift mechanism in which a slide key mounted on a key groove of a gear shaft is selectively engaged with a speed-change gear group which idles by a boss body interlocking with the operation of a shift arm. The present invention relates to a laterally shifting mechanism of a seedling mounting table in the transplanting machine.

[0002]

2. Description of the Related Art Conventionally, a slide key mounted on a key groove of a gear shaft and a boss body interlocking with a shift arm are integrally formed in a transverse feed mechanism of this type, and the shift arm is operated by operating the shift arm. A configuration in which the tip of a slide key is engaged with an arbitrary transmission gear has been known. However, in the case where the shift arm and the boss are integrally formed as described above, when the slide key is engaged with an arbitrary transmission gear during power transmission, a large force acts only on the slide key. May be damaged by torsional or bending forces.

In order to solve such inconvenience,
A recess is formed in the slide key so that the boss can be fitted to the outside. The boss can be freely rotated with respect to the slide key, and the slide key slides with the boss by rotating the shift arm locked to the boss. There are things that let me do that. However, a boss that is rotatable with respect to the slide key has problems such as rattling due to long-term use. An angle error was likely to occur when operating the arm.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and even if a boss body and a slide key interlocking with a shift arm are formed separately, they rotate with each other. In a transplanter that can be operated integrally without causing backlash etc. even when used for a long period of time, and it is possible to perform an accurate shift operation by minimizing the operation error of the shift arm as much as possible It is an object of the present invention to provide a lateral feed transmission mechanism for a seedling mounting table.

[0005]

In order to solve the above-mentioned problems, a technical means adopted by the present invention is to selectively engage a slide key mounted on a key groove of a gear shaft with a speed-change gear group which idles. In the lateral feed transmission mechanism of the seedling mounting table in the transplanter adapted to change the speed, a boss body interlocking with the shift arm is externally fitted to the gear shaft to which the slide key is attached,
A protrusion formed on a slide key is fitted into an engagement groove provided in the boss body, and the slide key and the boss body are integrally operated by a slide operation of a shift arm. In a lateral feed speed change mechanism of a seedling mounting table in a transplanter in which a slide key attached to a keyway of a shaft is selectively engaged with a speed-change gear group that idles to shift the speed, a gear shaft to which the slide key is attached, A boss body interlocking with the shift arm is externally fitted, a projection formed on a slide key is fitted into an engagement groove provided in the boss body, and the side surface of the projection is slidably contacted with the engagement groove. The protruding portion is provided with a rising portion which is in sliding contact with the front and rear sides of the boss body, and the slide key and the boss body are integrally operated by sliding operation of the shift arm.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described in detail based on preferred embodiments shown in the drawings. First, in FIGS. 2 and 3, reference numeral 1 denotes a traveling body of a riding rice transplanter exemplified as a transplanter, in which an engine 5 is mounted on a front part of a body frame 4 having a front wheel 2 and a rear wheel 3, and A driving operation unit 6 and a driver's seat 7 are provided.

A planting section 9 is provided at the rear of the traveling body 1 via a link mechanism 8 so as to be movable up and down. Numeral 10 denotes a drive case of the planting part 9, and 11 denotes a planter case. A seedling table is mounted on both sides of a rear part of the planter case 11 with rotary type planting rods 12 and reciprocally fed to the left and right. Numeral 13 is arranged in a front-to-back and rear-to-bottom manner, and a planting rod 12 that is planted and operated in accordance with the running of the machine is used to transfer a mat seedling placed on a seedling mounting table 13 to an outlet 15 of a seedling receiving plate 14. From the unit planting plant to scrape and plant in the field.
In this embodiment, a connecting pipe 1 having a drive shaft therein is used.
6 is configured as a six-row planting portion that supports the center and left and right planter cases 11. 17 is a seedling table 13
Numeral 18 indicates a seedling vertical feeding device provided on the back side of the float.

Numeral 19 denotes a seedling mounting table 1 screwed around a rotary spiral shaft 20.
In the lateral feed mechanism 3, the seedling table 13 connected to the lateral feed mechanism 19 is laterally fed left and right by the rotation of the rotary spiral shaft 20. It is an elastic bellows-like cover that covers the 21-turn spiral shaft 20. 22 is a rotary spiral shaft 20
, Which is provided at one end side of the, and is configured to change the rotational speed of the rotary helical shaft 20 to change and adjust the lateral feed speed of the seedling mounting table 13. Reference numeral 23 denotes a laterally oriented planting section frame.

The transverse feed mechanism 22 is constructed as follows. That is, in FIGS.
Is a transmission gear shaft that is driven to rotate. The transmission gear shaft 24 has a plurality of transmission gears 25, 26, 27,
A gear group consisting of 28 is freely rotatably fitted.
Further, intermediate gears 30, 31, 32, and 33 meshing with these transmission gears 25 to 28 are key-fixed to a counter shaft 29 parallel to the transmission gear shaft 24, and a large diameter gear located at a side end thereof. Intermediate gear 30 meshes with a driven gear 34 fixed to the rotary spiral shaft 20.

An axial slide key 36 is mounted in a key groove 35 of the transmission gear shaft 24, and a boss 38 interlocking with a shift arm 37 is fitted on the transmission gear shaft 24, By the operation of 37, the boss body 38 and the slide key 36 slide integrally, and the locking portion 39 provided at the tip of the slide key 36 causes the transmission gears 25 to
It is designed to selectively engage with 28 locking grooves. That is, as shown in FIG. 1, the boss body 38 has an axially engaging groove 40 formed on the inner surface of the mounting hole, while the slide key 36 has a projection 41 fitted into the engaging groove 40. The protrusion 41 fitted in the engagement groove 40 restricts rotation of the boss body 38 with respect to the slide key 36 due to the side surface 41 a slidingly contacting the inner surface of the engagement groove 40. doing.

At both ends of the protruding portion 41, rising portions 41b are formed on the front and rear side surfaces of the boss body 38 so as to be in sliding contact with the outside from outside, and the boss body 38 moves in the axial direction with respect to the slide key 36. Is regulated. Therefore, the boss body 38 and the slide key 36 formed separately are operated integrally with the shift arm 37.

The shift arm 37 has a distal end fixed to a boss body 38, and a base end fixed to an operating rod 42 that slides in parallel with the transmission gear shaft 24. When the shift arm 37 is slid, the boss body 38 and the slide key 36 are integrally operated to change the speed. Reference numeral 43 denotes a detent groove provided on the operation shaft 42, and reference numeral 44 denotes a detent ball which fits into the detent groove 43 at a shift position. The transverse feed mechanism 22 configured as described above is fixedly supported by the planting section frame 23.

FIGS. 7 to 9 show a boss body 38.
A notch groove 45 is provided on the outer periphery of the shaft, and a plurality of protrusions 47 fitted into the notch groove 45 are provided in the case 46 of the lateral feed mechanism 22 in a straight line, so that the seedling mounting table 13 to be laterally fed is moved to the lateral end. Alternatively, the gear can be changed only when the vehicle is at the center. That is, in the conventional lateral feed transmission mechanism, if the locking portion of the slide key matches the locking groove of the transmission gear, the transmission can be performed wherever the seedling mounting table 13 is located. Even if the gear is incorporated in the transmission mechanism, if the gear is changed during rotation of the transmission gear,
Could not be confirmed at the final end of the traverse feed, and in order to reconfirm it, the case of the traverse transmission mechanism had to be removed and the position of the matching mark had to be confirmed. Therefore, as described above, the speed can be changed only when the locking grooves of the speed change gears 25 to 28 are in a straight line.
This makes it easy to assemble it by assuming a position where the end 3 is located at the end of the lateral feed.

Since the present invention is configured as described above, the seedling table 13 is laterally fed to the left and right with the rotation of the rotary spiral shaft 20 during the planting operation. Then, if the shift arm 37 is slid by gripping the operation rod 42, the boss body 38 and the slide key 36 are integrally operated.
8, the lateral feed speed of the seedling mounting table 13 can be shifted.

As described above, since the slide key 36 attached to the key groove 35 of the transmission gear shaft 24 and the boss 38 externally fitted to the transmission gear shaft 24 can be formed separately, the slide key 36 and the boss 38 Can be manufactured easily and accurately.

The engagement groove 40 provided in the boss body 38
The protrusion 41 of the slide key 36 is fitted to restrict the boss body 38 from moving in the axial direction with respect to the slide key 36, and the rising portion 41 b formed on the protrusion 41 allows the boss body 38 to slide. Since the movement of the key 36 in the axial direction is restricted, the boss body 38 and the slide key 36 can be integrally operated without rotating each other. Does not occur.

Further, since the boss body 38 and the slide key 36 are integrally operated by the sliding operation of the shift arm 37 fixed to the operating rod 42, there is no occurrence of an angular error unlike the rotary shift arm. Shift arm 3
7, the operation error can be reduced as much as possible, so that an accurate gear change operation can always be performed.

[0018]

In summary, the present invention is directed to a laterally shifting transmission of a seedling mounting table in a transplanting machine in which a slide key mounted in a key groove of a gear shaft is selectively engaged with a speed-change gear group to be idled for shifting. In the mechanism, a boss body interlocking with the shift arm is externally fitted to the gear shaft to which the slide key is attached, and a protrusion formed on the slide key is fitted to an engagement groove provided in the boss body, The slide key and the boss are integrally operated by the slide operation of the shift arm, and the boss that is interlocked with the shift arm is fitted around the gear shaft to which the slide key is attached, and the engagement provided on the boss is provided. In the groove,
The protrusion formed on the slide key is fitted to slide the side surface of the protrusion into the engagement groove, and the protrusion has a rising portion that slides on both front and rear side surfaces of the boss body to slide the shift arm. Since the slide key and the boss are integrally operated by the operation, the slide key and the boss can be formed separately, so that processing can be performed easily and accurately.

Moreover, since the slide key and the boss body operate integrally without rotating each other, there is no occurrence of play due to friction even when used for a long period of time. Since the slide key is selectively engaged with the transmission gear group by the slide operation of the shift arm, an accurate shift operation can be performed without causing an angular error unlike a rotary shift arm.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part.

FIG. 2 is an overall side view of the riding rice transplanter.

FIG. 3 is a plan view of a planting section.

FIG. 4 is a cross-sectional view of a lateral feed transmission mechanism.

FIG. 5 is a sectional view as seen from the direction of arrow A in FIG. 4;

FIG. 6 is a side view showing a fixed state of the lateral feed transmission mechanism.

FIG. 7 is a cross-sectional view of a transverse feed mechanism showing another embodiment.

8 is a cross-sectional view as viewed from the direction of arrow A in FIG.

FIG. 9 is an exploded perspective view of a main part of the above.

[Explanation of symbols]

 24 Transmission gear shaft 35 Key groove 36 Slide key 37 Shift arm 38 Boss body 40 Engagement groove 41 Projection

Claims (2)

[Claims] 1. A lateral feed transmission mechanism for a seedling mounting table in a transplanting machine in which a slide key attached to a key groove of a gear shaft is selectively engaged with a speed-change transmission gear group to shift a speed. A boss body interlocking with the shift arm is externally fitted to the mounted gear shaft, and a projection formed on a slide key is fitted into an engagement groove provided on the boss body, and slide is performed by sliding operation of the shift arm. A transversal transmission mechanism for a seedling mounting table in a transplanter, wherein a key and a boss are operated integrally. 2. A lateral feed transmission mechanism for a seedling mounting table in a transplanting machine in which a slide key attached to a key groove of a gear shaft is selectively engaged with a speed-change transmission gear group to shift a speed. A boss body interlocking with the shift arm is externally fitted to the mounted gear shaft, and a projection formed on a slide key is fitted into an engagement groove provided in the boss body, and a side surface of the projection is engaged with the engagement groove. A transplanting machine characterized in that a sliding portion is provided on the protrusion and a rising portion is provided on the front and rear side surfaces of the boss body so as to slide on the front and rear sides of the boss body, and a slide key and a boss body are integrally operated by a sliding operation of a shift arm. Traverse speed change mechanism of the seedling mounting table.