KR20220093058A - Transmission device of paddy field working machine - Google Patents

Abstract

The present invention relates to a transmission device for a paddy field working machine. The transmission device for a paddy field working machine, according to the present invention, comprises: a main case part having a main transmission mechanism and a sub-transmission mechanism; a planting work case part; and a branch case part, wherein the planting work case part is formed as a separate body from the main case part and is integrally connected and fixed to the main case part. According to the present invention, miniaturization of a work case part can be achieved.

Description

TRANSMISSION DEVICE OF PADDY FIELD WORKING MACHINE

The present invention is provided with a main case unit for outputting shift power to a driving drive system and a work case unit for outputting shift power to a working device to a traveling body capable of moving a pavement, and the working case unit works from a working system transmission mechanism It relates to a transmission device of a work machine having a built-in work clutch capable of intermittently transmitting power to a drive shaft.

In addition, the present invention relates to a transmission device for a power receiving machine equipped with a working device such as a seedling transplantation device for performing seedling transplantation with respect to the ground or a direct sowing device for sowing rice seeds into the ground on a traveling body capable of moving a pavement.

In addition, the present invention relates to a transmission device for a power receiving machine equipped with a working device such as a seedling transplantation device for performing seedling transplantation with respect to the ground or a direct sowing device for sowing rice seeds into the ground on a traveling body capable of moving a pavement.

In installing the work clutch, in the conventional structure, the engaging portion of the driving-side rotating member and the driven-side rotating member, the engaging portion of the clutch operation member with respect to the driven-side rotating member, and the biasing spring are provided in the work case portion. It was arrange|positioned in order in the axial direction of the output shaft inside (refer patent document 1).

On the other hand, a power receiving work machine provided with a planting system work device such as a seedling transplantation device or a direct sowing device has a fertilization power take-out structure for supplying the fertilization device with the power of the engine mounted on the traveling body. As a power receiving working machine of such a structure, there exists a thing of the structure described in following [1], for example.

[1] Inside the transmission case, the transmission mechanism of the travel drive system and the transmission mechanism are built-in, and the fertilization drive case is arranged in the rear part of the transmission case. And the traveling transmission shaft for rear-wheel drive projecting rearward from the transmission case penetrates the fertilization drive case and extends to the rear side, and the driving force can be branched and transmitted toward the fertilization device in the middle of the traveling transmission shaft (patent document) see 2).

On the other hand, in a power receiving work machine provided with a working device of a planting system such as a seedling transplantation device or a direct sowing device, power extraction for supplying the power of the engine mounted on the traveling body also to the seedling transplantation device or the direct sowing device separately from the traveling drive system structure is provided. As a power receiving working machine of such a structure, there exists a thing of the structure described in following [2], for example.

[2] Inside the transmission case, the traveling part transmission part of the traveling drive system and the 1st, 2nd pole transmission part with respect to a seedling transplantation apparatus are built-in. Power shifted from the traveling part transmission unit is output to the front and rear wheels via the output shaft and the electric chain, and the power shifted from the first and second weekly shift units is output to the seedling transplanter via the power take-out shaft. A plurality of gear pairs are used in the first and second weekly transmission units, and a target gear pair is selected from a shift key (in the patent document, a clutch body in the patent document) provided in each transmission unit, so that a multi-stage weekly shift can be performed. It is comprised (refer patent document 3).

Japanese Patent Laid-Open No. 2008-173087 (refer to paragraphs "0038" and "0039", FIGS. 5 and 7) Japanese Patent Laid-Open No. 2015-223110 (see paragraphs "0086", "0092", "0094", FIGS. 9, 13, and 14) Japanese Patent Laid-Open No. 2008-289399 (refer to paragraphs "0032", "0036", "0038", "0050", FIGS. 3, 4 and 6)

In the transmission device of the work machine described in Patent Document 1, a space corresponding to the sum of the axial length of the driving-side rotating member, the axial length of the driven-side rotating member, and the axial length of the biasing spring is the output shaft in the work case. There is room for improvement in that it is necessary for the upper body, and it is difficult to reduce the size of the transmission device.

An object of the present invention is to devise an arrangement structure of a driving side rotating member, a driven side rotating member, a clutch operation member, and a biasing spring in the working case part, and further downsizing the working case part.

On the other hand, in the power receiving work machine described in the said patent document 2, the fertilization drive case is provided separately from the transmission case. Therefore, compared with the case where a fertilization drive mechanism is also incorporated in a mission case, it is useful at the point which can avoid enlargement of the mission case itself. However, since a weekly transmission mechanism is also equipped inside the transmission case in addition to the transmission mechanism of the travel drive system, there is room for improvement in that it is difficult to achieve further miniaturization of the transmission case.

In addition, if the fertilization drive case is provided separately from the transmission case in this way, the fertilization drive case is removed from the power receiving work machine of the specification not provided with the fertilization device, and only the power receiving work machine of the specification having the fertilization device is equipped with the fertilization drive case It is advantageous in that it is easy to obtain a structure according to the specifications of the faucet working machine.

However, if the transmission case and the fertilization drive case are composed of different cases independent of each other, there is a convenience in that it is easy to diversify the specifications, but for each case, a bearing structure and a seal structure are required inside it, It is easy to cause an increase in the number of parts. Moreover, in the connection part of cases, since the wall surface which opposes in a connection part is connected and it becomes a double-wall structure, there exists a possibility that the total weight may increase, and there exists room for improvement in these points.

The present invention makes the transmission case a structure that makes it easy to diversify the specifications of the power receiving working machine, and achieves miniaturization of the main part of the transmission case, and also increases the number of parts and the weight of the entire transmission case. This is to avoid an increase.

On the other hand, in the power receiving work machine described in Patent Document 3 above, in the engagement location of the gear pair and the shift key at each shift stage, the structure of the engagement portion in each gear pair is configured to have substantially the same specifications. . Therefore, the engagement of the shift key with respect to each gear pair is obtained in the same engagement state even when any one of a plurality of gear pairs is selected as engagement target.

However, each gear pair, which is a gear for shifting, has a structure in which a gear diameter is set to be various according to a transmission ratio, and a transmission torque is also different for each shift stage. For this reason, the gear pair set so that the transmission torque may be small and the gear pair set to the large transmission torque also differ in required intensity|strength according to the required torque.

However, in the structure described in Patent Document 3, since the engagement margin of all gear pairs with respect to the shift key is set to be the same, in accordance with the gear pair set to transmit the maximum torque, all gear pairs and the shift key If the engagement margin is designed to be large, there is a risk of causing the following problems. That is, in the gear pair of the shift stage where the assumed transmission torque is small, the engagement margin of the shift key has a structure in which the engagement margin is excessively large.

Accordingly, when the engagement margin in the small-diameter electric gear among the gear pairs is increased, the transmission gear itself tends to have a large diameter in order to secure the engagement margin. And when the diameter of the electric gear on the side of a small diameter becomes large, the diameter of the electric gear on the side of a large diameter meshing with it also increases inevitably, and there exists a possibility that the whole gear pair may become enlarged, and there exists room for improvement in this point.

According to the present invention, the size of the engagement margin at the engagement location of the gear pair of each shift stage and the shift key by the plurality of gear pairs is set to a size corresponding to the transmission torque for each gear pair, thereby reducing the size of the transmission. will do

A characteristic of the transmission device for a work machine according to the present invention is a main case unit having a transmission mechanism for shifting input engine power and outputting shift power to a driving drive system; A work case unit having a built-in work system transmission mechanism and outputting shift power to the work device is provided, and the work case unit includes a work drive shaft for transmitting the shift power by the work system transmission mechanism to the work device, and the work A work clutch capable of intermittently transmitting power from the system transmission mechanism to the work drive shaft is incorporated, the work clutch comprising: a drive-side rotation member to which power from the work system transmission mechanism is transmitted from an upper side in a power transmission direction; A driven side rotating member that is externally fitted to the work driving shaft from a lower side in the power transmission direction than the driving side rotating member and is rotatably supported on the working driving shaft integrally;

The driving-side rotating member and the driven-side rotating member are each provided with an engaging portion capable of transmitting power in an engaged state on their opposing surfaces, and the driven-side rotating member with respect to the driving-side rotating member, A biasing spring configured to be movable in a distance along the axial direction of the working drive shaft and for pressing and urging the driven-side rotary member toward the driving-side rotary member is externally fitted to the working drive shaft and is provided to resist the biasing force of the biasing spring and a clutch operation member capable of operating the driven-side rotation member to a side away from the driving-side rotation member is provided, and the clutch operation member engages with an engagement portion formed on the outer periphery of the driven-side rotation member to engage the bell configured so as to be operable to operate the ipsilateral rotation member on a side away from the driving-side rotation member, and wherein the biasing spring is disposed on the inward side in the radial direction of the driven rotation member from the engagement location of the clutch operation member and the engagement portion. it is equipped

According to the present invention, the abutting position of the biasing spring with respect to the driven-side rotating member is set on the radially inward side from the engaging position without being constrained by the existence position of the engaging position of the clutch operation member and the engaging portion. Since it can be set, there is an advantage in that it is easy to shorten the internal space of the work case portion in the moving direction of the driven-side rotation member while using a pressing spring of a required length.

In the present invention, a spring accommodating portion is formed on a surface of the driven-side rotating member opposite to the side on which the engaging portion is formed, and the spring accommodating portion engages the clutch operation member and the engaging portion in the axial direction of the work drive shaft. It is preferable if it is provided in the location near the said opposing surface side in which the said engaging part was formed rather than the engaging location.

According to the present invention, since the spring accommodating portion is provided at a position closer to the opposite surface side where the engaging portion is formed than at the engaging position of the engaging portion between the clutch operation member and the engaging portion in the axial direction of the working drive shaft, in the movement direction of the driven-side rotating member, By overlapping the driven-side rotation member and the biasing spring, it is possible to reliably shorten the internal space of the work case portion.

In the present invention, the pressing spring is mounted between the spring accommodating portion and the fixing portion on the inner surface side of the work case portion, and is located on the other end side rather than the one end side in the axial direction of the work drive shaft. It is suitable if it is formed in a truncated cone shape with a large winding diameter.

By providing this structure, it becomes difficult to deform|transform, such as a bending|flexion of a biasing spring in the direction which cross|intersects in an expansion-contraction direction, and it is easy to exhibit a spring force accurately.

In the present invention, in the pressing spring, a winding diameter of the side supported by the spring receiving portion of the driven side rotating member is larger than that of the opposite side, and the winding diameter of the opposite side is that of the pressing spring. It is suitable if the inner peripheral surface is set to such a degree that it abuts against the outer peripheral surface of the said work drive shaft.

By providing this configuration, the winding diameter of the side supported by the spring receiving part is increased and the winding diameter of the opposite side is small and set to such a degree that it abuts against the outer circumferential surface of the working drive shaft. and easy to install stably.

In the present invention, the clutch operation member includes an operation pin that passes through the work case portion and is operated around a rotational axis in a direction crossing the axis of the work drive shaft, and the operation pin at a portion exposed to the outside of the work case portion It is suitable if the operation plate provided in the axial end of , and the operation case part is equipped with the operation guide member which performs positioning in the direction along the said rotation axis of the said operation plate.

By providing this configuration, it is possible to reliably control the escaping from the work case portion without impairing the operability of the clutch operation member.

In the present invention, it is preferable that the operation guide member includes a guide portion that can allow operation around the rotation axis of the operation plate within a range corresponding to the on-off operation range of the work clutch.

By providing this configuration, it is possible to appropriately recognize the operation range by the clutch operation member by using the means for regulating the escape of the clutch operation member from the work case portion, and the operability can be improved with a simple structure.

In the present invention, the work drive shaft is an output transmission shaft that rotates integrally with the driven side rotating member, and is externally fitted to the output transmission shaft so as to be rotatably relatively rotatable, so that the power in the transmission direction above the output transmission shaft is transmitted. It has a dual shaft structure part by a shaft body, and among the normal shaft body, the part located at the uppermost side in the rolling direction is inserted into the inner periphery of the barrel boss of the bevel gear for output located in the main case part, and the uppermost side in the rolling direction It is suitable if the inner peripheral side passage of the said normal shaft body in the site|part located in the part connects the inside of the said main case part and the said double shaft structure part.

By providing this structure, the space on the inner peripheral side of the cylindrical boss of the output bevel gear in the main case part, the inner peripheral side passage of the normal shaft, and the dual shaft structure part of the output transmission shaft and the normal shaft are effectively used, and the inside of the main case part is Lubricating oil can be guided to the working case side.

In the present invention, it is preferable if the normal shaft body is divided into a plurality of locations in the axial direction of the output transmission shaft body, and a member rotating together with the normal shaft body is attached to each divided cylindrical shaft body.

By providing this structure, even if an output transmission shaft body with a long axial direction length is used, moderate lubrication can be performed using the clearance gap between the normal shaft bodies which exist in the middle.

The power transmission device of the present invention is characterized in that it is equipped with a main transmission mechanism for shifting input engine power and a sub transmission mechanism for shifting the power transmitted from the main transmission mechanism in multiple stages and outputting it to the travel drive system. is provided with a main case unit, and a planting work case unit having a built-in planting system transmission mechanism for shifting and transmitting the power output from the main case unit to a seedling transplantation device or a sowing device is provided, and the planting work case unit includes the main case It is comprised separately from a part, and while being integrally connected and fixed with respect to the said main case part, the said main case part and the said planting work case part are sealing which joined the openings formed in the mutual connection location. In this state, the respective internal spaces are in communication with each other.

According to the present invention, the planting work case part for transmitting power to the seedling transplantation device or the seeding device by embedding the planting system transmission mechanism is different from the main case part equipped with the main transmission mechanism or the auxiliary transmission mechanism for outputting power to the driving drive system. are configured separately. Thereby, it is possible to achieve downsizing of the main case part, which is a main part of the transmission case, and it is possible to select various types of specifications of the combined wave type transmission mechanism, and there is an advantage that it is easy to obtain a power receiving work machine with a rich variety of specifications. .

Moreover, the main case part and the planting work case part are connected in the state which made each internal space communicate with each other in the sealed state which joined the opening parts formed in the mutual connection location.

Accordingly, the case portion itself is formed individually, but in a combined and connected state, it is configured as one sealed case in which the inner space communicates. Thereby, it is also advantageous in that it can be avoided that the wall portions facing each other at the connection point have a double structure, which increases the weight, as in the case where completely separate cases are connected, and that numerous shaft support structures and seals are required. .

In the present invention, there is provided a branch case part for branching transmission of power output from the main case part to the powder or granular material supply device by incorporating a branch transmission mechanism, and the branch case part is configured as a separate body from the main case part, Further, while being integrally connected and fixed with respect to the main case part, the main case part and the branch case part communicate with each other in the sealed state in which the openings formed at each other's connecting points are joined to each other. It is suitable if

According to the present invention, a main case equipped with a main transmission mechanism or a sub-transmission mechanism for outputting power to a travel drive system, a branch case portion for branching and transmitting power output from the main case portion to a powder or granular material supply device by incorporating a branch transmission mechanism It is separate from the department. There is an advantage in that it is possible to achieve downsizing of the main case part, which is a main part of the transmission case, and it is possible to select various specifications of the branched transmission mechanism to be combined, and it is easy to obtain a power receiving work machine with a rich variety of specifications.

In addition, the main case part and the branch case part are connected in a state in which the respective internal spaces are in communication with each other in a sealed state in which openings formed at each other's connection points are joined to each other. Accordingly, the case portion itself is formed individually, but in a combined and connected state, it is configured as one sealed case in which the inner space communicates. Thereby, it can avoid that the wall surface part which opposes at a connection point becomes a double structure, and the weight increases, like the case where completely separate cases are connected, and a shaft support structure and a sealing part are required innumerably.

In the present invention, the wave-type shift mechanism includes a shift operation shaft spanning the internal space of the shift operation case part and the internal space of the main case part, and slide operation along the axial direction of the shift operation shaft to the shift operation shaft. It is suitable if the supported shift gear is provided, and the slide operation range accompanying the shift operation of the said shift gear is set over the internal space of the said planting work case part and the internal space of the said main case part.

By providing this structure, the internal space of the main case part can also be utilized as a slide operation range accompanying the shift operation of a shift gear. As a result, the volume of the space to be set in the internal space of the planting work case part can be reduced among the slide operation ranges accompanying the shift operation of a shift gear, and the size reduction of the planting work case part can be achieved.

In the present invention, the branch case part is externally fitted to the driving transmission shaft of the traveling drive system extending from the main case portion, and an input side cylindrical portion supporting the traveling transmission shaft, in a direction intersecting the traveling transmission shaft It is externally fitted to the extended branch drive shaft and has an output side cylindrical part for supporting the branch drive shaft, the input side cylindrical part is connected to the main case part, and the output side cylindrical part is integrally formed with the input side cylindrical part, and is larger than the branch drive shaft. It is suitable if the bevel gear for branch output is equipped in the said input side cylindrical part on the side close to the said main case part.

By having this configuration, compared to the case where the bevel gear for branch output is disposed on the side farther from the main case than the branch drive shaft, the space of the input side cylindrical part on the side farther from the main case part than the branch drive shaft can be set small, Consequently, it is possible to achieve downsizing of the entire branch case portion.

In the present invention, the bevel gear for branch input meshing with the bevel gear for branch output is supported on the branch drive shaft, the bevel gear for branch output is supported on the transmission shaft for travel, and the transmission shaft for travel includes the It is preferable if the positioning part which regulates the position movement of the said bevel gear for branch output to the side opposite to the side where the bevel gear for branch input exists is provided.

By providing this structure, since the branch case part can be built into the main case part in the state which supported the bevel gear for branch output on the transmission shaft for traveling, it is easy to perform assembly and disassembly of a branch case part.

In the present invention, it is preferable that the opening of the branch case portion formed at a location opposite to the main casing portion has an inner diameter through which the branch output bevel gear supported by the driving transmission shaft can be inserted.

By providing this configuration, since the bevel gear for branch output can be withdrawn from the opening of the branch case part while being supported by the transmission shaft for running, assembly and disassembly of the bevel gear for branch output and the transmission shaft for running with respect to the branch case part It's easy.

In the present invention, the input-side end of the branch drive shaft is configured to be insertable and withdrawable with respect to the output-side opening formed in the branch case portion, and the branch case portion has an insertion limit position of the input-side end of the branch drive shaft. It is a location corresponding to , and it is preferable if the transmission shaft for traveling is supported at a position in contact with the end of the branch drive shaft on the input side.

By providing this structure, it is easy to position the end position of the input side of a branch drive shaft with respect to a branch case part.

In the present invention, the auxiliary transmission mechanism includes a pair of high-speed gears suitable for on-the-street driving, spanning an upper shifting shaft positioned upward in the power transmission direction and a lower shifting shaft positioned downward in the power transmission direction; , a gear pair for low speed suitable for work travel is provided, and a shift member positioned between the pair of gears on the lower shift shaft is provided, wherein the shift member is positioned in the axial direction of the lower shift shaft The lower gear is supported movably and is provided with meshing teeth protruding in the direction of existence of the lower gear positioned lower in the power transmission direction among the gear pairs, and positioned opposite to both sides of the shift member. A meshing recessed portion for meshing with the meshing tooth portion of the shift member is formed in each of the meshing recesses, and among the meshing recesses, the meshing recessed portion of the lower gear in a high-speed gear pair suitable for on-road driving is included in the lower shift shaft. It is suitable if the shape is connected to the shaft support hole of the lower gear that is externally fitted to the .

By providing this structure, the meshing recessed part of a lower gear can be formed simultaneously with the shaft support hole of a lower gear. Accordingly, the position of the meshing recess can be made to have a small diameter that is close to the shaft diameter of the lower shift shaft to the limit, and the lower gear in the high-speed gear pair can be formed to have a smaller diameter. Thereby, it is advantageous in that it is easy to raise the reduction ratio in the gear pair for high speed.

Moreover, by connecting with the shaft support hole of a lower gear, it is easy to make the shape of a meshing recessed part also simple.

In the present invention, there is provided an axle case to which power of a driving drive system is transmitted, and the axle case includes a pair of bevel gears on the transmission upper side located on the upper side of the transmission shaft along the vertical direction, and on the lower side of the transmission shaft. It is suitable if the transmission lower bevel gear pair is provided, and each bevel gear pair is reduced in transmission, and the reduction ratio in the transmission lower bevel gear pair is set larger than the transmission upper bevel gear pair.

By providing this structure, while deceleration is reduced on both upper and lower sides of the transmission shaft in an axle shaft case, also in the upper and lower both sides of the transmission shaft, the reduction ratio in the transmission lower bevel gear pair is larger than the transmission upper bevel gear pair. Thereby, the reduction ratio in the site|part close|similar to the last output point on the lower side of transmission is made large as much as possible, and it is made possible to effectively reduce the torque in the upstream side from that.

A characteristic of the transmission device of the power receiving work machine according to the present invention is that a wave-type transmission mechanism for shifting engine power and transmitting it to a seedling transplantation device or a seeding device is built into the planting work case part, and the plant-type transmission mechanism is on the upper side of the transmission A plurality of gear pairs arranged in a state of being engaged at all times over the input side transmission shaft and the output side transmission shaft under the transmission of The shift operation body includes a shift key portion capable of selectively engaging and detaching any one of the electric gears constituting the gear pair as an engaging engagement target, and the shift key for the engaging engaging target electric gear. The engagement margin of a part is comprised so that the said gear pair in which the weekly pitch by the said seedling transplantation apparatus or the seeding pitch by the said seedling apparatus was set short among said several said gear pair is selected, so that it may become large.

According to the present invention, the more the gear pair in which the weekly pitch by the seedling device or the seeding pitch by the seeding device is set shorter among the plurality of gear pairs is selected, the engagement margin of the shift key part with respect to the electric gear to be engaged is increased set to grow.

That is, considering that a gear pair in which the weekly pitch by the seedling device or the seeding pitch by the seeding device is set shorter requires a larger transmission torque, The engagement margin is larger than the engagement margin between the gear pair and the shifting key in the portion where the main pitch or the seeding pitch is long. As a result, the engagement margin between the gear pair and the shift key at each shift stage is set to a size corresponding to the transmitted torque for each gear pair, and the engagement margin of the gear pair in the portion where the weekly pitch or the seeding pitch is long. By omitting the waste part, it becomes possible to reduce diameter as much as possible, and compactness of the whole structure can be achieved.

In the present invention, a plurality of sets of intervals in the axial direction of the input-side transmission shaft or the output-side transmission shaft are set between the transmission gears arranged at adjacent positions in the axial direction of the input-side transmission shaft or the output-side transmission shaft. is arranged, and the spacing between the collars is the shift key part with respect to the electric gear, the more the gear pair in which the weekly pitch by the seedling transplantation device or the seeding pitch by the seeding device is set to be shorter exists It is suitable if it is set at a wide interval so that the amount of engagement of

ADVANTAGE OF THE INVENTION According to this invention, the diurnal pitch by a seedling transplantation apparatus or the seeding pitch by a seedling apparatus can be changed by using the collar for setting the space|interval between electric gears, and changing the space|interval between the collars narrowly.

And, because the amount of engagement with the transmission gear in the gear pair of the shift key part inserted between the collars also changes due to the wide narrowing of the spacing between the collars, it is easy to simply change the spacing between the collars. With the structure, it is possible to obtain a structure capable of changing the engagement amount of the shift key portion with respect to the electric gear.

In the present invention, the distance between the electric gears in the axial direction of the input-side transmission shaft or the output-side transmission shaft is higher than the distance between the electric gears existing at a location where the spacing between the collars is increased. It is suitable if the space|interval of the said electric gear which exists in the location which narrowed down the space|interval of is narrowed.

According to the present invention, a plurality of gear pairs are arranged along the axial direction of the input-side transmission shaft or the output-side transmission shaft. And, in the position adjacent to each other in the axial direction, as the distance between the teeth of the electric gear constituting the gear pair, the space between the collars is narrowed rather than the space between the teeth of the electric gear existing at the location where the space between the collars is widened. The space|interval between the teeth of the electric gear which exists in a location is narrowed.

Thereby, the spacing between the collars and the spacing between the teeth of the electric gear in the small portion of the transmitted torque are also narrowed, further compacting the wave type transmission mechanism, and making it easier to arrange it in the mounting work case part. Consists of.

In the present invention, the shift operation body slides the shift key part and the shift key part in the axial direction of the input-side transmission shaft or the output-side transmission shaft to engage the transmission gear to be engaged. and a slide operation unit for selectively operating an engagement position, wherein the shift key part engages with the electric gear intersecting the slide operation direction by the slide operation unit by using a connection point to the slide operation unit as a pivot point. It is suitable if it is configured to be capable of swinging in any direction.

By providing this configuration, as a shift operation body, a slide operation unit for selectively operating an engagement position with respect to the electric gear, and a connection point to the slide operation unit as a rocking point, a transmission that intersects the slide operation direction by the slide operation unit By using the shift key configured to be capable of swinging in the engagement direction with the gear, the engagement depth by the shift key can be appropriately set for each pair of gears. And the support part of the slide operation part in the transmission case equipped with this speed change operation body may be provided with the sealing structure which can respond to simple slide operation which does not need to respond to performing the complicated oscillation operation of the slide operation part. Therefore, it is easy to adopt a relatively simple structure as the seal structure.

In the present invention, the shift operation body includes an elastic pressing mechanism for pressing and pressing the shift key portion to the side of the electric gear to be engaged, and the pressing portions by the elastic pressing mechanism are located in the plurality of gears. The gear pair, which is set at a position spaced apart from the swinging point rather than the pair, and sets the weekly pitch by the seedling transplantation device or the seeding pitch by the seeding device shorter than the pair, is set from the pressing position by the elastic pressing mechanism. It is suitable if it is located near and away from the swinging point side.

By providing this configuration, since the elastic pressing mechanism for pressing and pressing the shift key portion to the side of the electric gear to be engaged is provided, the engagement depth of the shift key with respect to the gear pair is reduced with the sliding operation of the shift operation body. can be adjusted automatically.

And, the pressing position by the elastic pressing mechanism is set at a position spaced apart from the swinging point rather than the plurality of gear pairs, and the shorter the weekly pitch by the seedling transplantation device or the shorter the seeding pitch by the seeding device, the shorter the gear pair. Since the position is spaced apart from the oscillation point side from the pressing position by the elastic pressing mechanism, the more strongly the pressing and pressing action by the elastic pressing mechanism is the gear pair in which the diurnal pitch or the seeding pitch is set shorter by the action of the lever.

Accordingly, even when a large torque is applied to the engagement portion of the gear pair and the shift key, the possibility that the shift key is simply disengaged from the engagement portion with the gear pair is reduced.

1 is a left side view of a riding type rice transplanter.
2 is a diagram showing a power transmission system.
3 is an exploded cross-sectional view of the main case portion in the transmission case.
It is sectional drawing in the up-down direction of the main case part in a transmission case.
It is sectional drawing in the horizontal direction of the branch case part in a transmission case.
6 is a perspective view showing a connection state of the main case portion and the branch case portion to the main case portion.
Fig. 7 is an explanatory view showing a meshing portion between a shift member and a lower gear in the auxiliary transmission mechanism.
It is a top view which shows the operation tool of the implantation clutch.
It is an exploded perspective view which shows the operation tool of an implantation clutch.
It is sectional drawing in the up-down direction in the axle case on the front-wheel side.
11 is a left side view of the riding type rice transplanter.
12 is a diagram showing a power transmission system.
13 is an exploded cross-sectional view of the main case portion in the transmission case.
Fig. 14 is an explanatory view showing a meshing portion between a shift member and a lower gear in the auxiliary transmission mechanism.
15 is a perspective view showing a connection state of the main case portion and the branch case portion to the main case portion.
It is sectional drawing in the up-down direction of the main case part in a transmission case.
Fig. 17 is an enlarged cross-sectional view in the vertical direction of the wave type transmission mechanism in the main case portion.
It is a top view which shows the operation part of the wave type transmission mechanism.
It is a top view which shows the operation tool of the implantation clutch.
It is an exploded perspective view which shows the operation tool of an implantation clutch.
It is sectional drawing in the horizontal direction of the branch case part in a transmission case.
It is explanatory drawing which shows the pattern display part in the lever guide part for weekly shift.
It is explanatory drawing which shows the pattern display part of the lever guide part in another embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, an example of embodiment of this invention is described based on description of drawing.

In addition, the front-back direction and the left-right direction in description of this embodiment are described as follows, unless there is a special explanation. That is, the advancing direction (refer to arrow F in Figs. 1 and 2) of the forward side at the time of work travel of a working machine (traveling body 1), such as a riding type rice transplanter to which the present invention is applied (see arrow F in FIGS. 1 and 2) is "forward" and backward (refer to arrow B in FIGS. 1 and 2) is "back", and the direction corresponding to the right side with respect to the forward posture in the front-back direction (refer to arrow R in FIGS. 2 and 3) is " Right", similarly, the direction corresponding to the left (refer arrow L in FIGS. 2 and 3) is "left".

[Entire configuration]

Fig. 1 is an example in which the transmission device of the working machine according to the present invention is applied, and it is equipped with a working device such as a seedling transplanting device for transplanting seedlings into the ground or a direct sowing device for sowing rice seeds into the ground (sea-type working device) The left side of the riding type rice transplanter is shown as an example of a faucet working machine.

This passenger-use rice transplanter includes a pair of left and right steering operation and drivable front wheels 11F and a pair of left and right rear wheels 11R that can be driven as a traveling driving device under the body frame 10, and the body frame A self-propelled traveling body 1 in which the front wheels 11F and the rear wheels 11R are driven by receiving power from the engine E mounted on the 10 is provided.

In the traveling body 1 , a driving unit 13 in which the engine E is incorporated is provided on the driving unit floor 14 on the front side of the body. Boarding having a steering wheel 15 for steering the front wheels 11F and a driver's seat 12 on the driver's floor 14 in the front-rear central portion of the traveling body 1 from the rear side of the driving unit 13 A driver is provided.

A fertilization device 9 (corresponding to a powder or granular material supply device) is mounted on the rear portion of the driver's seat 12 . The fertilization apparatus 9 feeds out the fertilizer stored in the fertilizer tank 90 each predetermined amount from the feeding apparatus not shown in figure, and the planter 91 equipped with the seedling transplantation apparatus 2 through the supply route not shown in figure. ) and is configured to be supplied in packaging. On the rear side of the traveling body 1, the seedling transplantation apparatus 2 is supported so that raising/lowering is possible via the link mechanism 25 which has the hydraulic cylinder 26 for raising/lowering operation.

The riding type rice transplanter comprised in this way performs the transplantation operation|work of seedlings, such as rice with respect to a field, with the seedling transplantation apparatus 2 .

In the front part of the traveling body 1, the mounting table 17 of the spare seedling is arrange|positioned at the left-right both sides of the driving|motive part 13 with the space|interval of the left-right direction enough to be able to move back and forth. In the rear part of the traveling body 1, the seedling transplantation apparatus 2 is supported so that raising/lowering is possible via the link mechanism 25 which has the hydraulic cylinder 26 for raising/lowering operation.

The riding type rice transplanter comprised in this way performs the transplantation operation|work of seedlings, such as rice with respect to a field, with the seedling transplantation apparatus 2 .

The seedling transplantation apparatus 2 is comprised in the 4-piece type|mold type, and the transmission case 22 supported rotatably by the transverse side part of the right and left side of the rear part of the transmission case 21, the transmission case 21, and transplantation. A pair of transplant arms 23 (graft hook drive mechanism) provided at both ends of the case 22 , a ground float 24 , and a seedling mounting table 20 on which seedlings are placed are provided. As the planting table 20 of the seedling is driven reciprocally from side to side, the transplantation case 22 is rotationally driven, and the transplantation arm 23 takes out the seedlings from the lower part of the seedling loading table 20 alternately. It is designed to be transplanted into the field.

While the transmission case M which axially supported the front wheel 11F is connected and fixed to the front part of the body frame 10 in the traveling body 1, to the rear part of the body frame 10, a rear wheel An axle case 19 equipped with 11R on the left and right is supported. A front frame 10F extends from the transmission case M toward the front, and the engine E is laterally mounted on this front frame 10F.

As shown in Figs. 2 and 3 , on both left and right sides of the transmission case M, the axle case 16 extends toward both left and right outer sides, and the left and right front wheels 11F and 11F are provided.

The axle case 19 of the rear wheel 11R is elastically supported so as to be movable up and down separately on the left and right through a suspension spring 18 on the lower side of the pair of left and right front and rear frames 10A and 10A, so that the left and right rolling operation is possible is properly installed.

[Power transmission system]

The power transmission structure in the transmission case M to which the power of the engine E is transmitted is demonstrated.

The motive power of the engine E input to the transmission case M is a traveling drive system for driving the front wheels 11F, the rear wheels 11R, etc. in the transmission case M, and a seedling transplantation device as a planting system working device. (2) Alternatively, it is output by branching into a work device drive system for driving a seeding device (not shown) and a fertilization drive system for driving the fertilization device 9 .

The transmission case M is comprised of a main case part 3 in which the auxiliary transmission mechanism 3A of the travel drive system, etc. are incorporated, and a main case part 4 disposed on the rear side of the main case part 3 (work case). It is provided with the part and the case part (corresponding to a planting work case part) and the case part (5).

The weekly case unit 4 is a weekly transmission mechanism 4A (corresponding to a working system transmission mechanism and a plant type transmission mechanism) which shifts and transmits the power output from the main case unit 3 to the seedling transplantation device 2 . , and the branch case part 5 incorporates a branch transmission mechanism 5A for branching transmission of the motive power output from the main casing part 3 to the fertilization apparatus 9 .

The motive power of the engine E is transmitted to the pump shaft 60a of the hydrostatic continuously variable transmission device 6 attached to the outer wall portion of the main case portion 3 of the transmission case M, and is a hydrostatic continuously variable transmission speed. It is input from the motor shaft 61a of the apparatus 6 into the inside of the case body 30 in the main case part 3 . That is, the hydrostatic continuously variable transmission 6 is used as a continuously variable main transmission, and the power output from the main transmission is further shifted in the transmission case M.

[Travel drivetrain]

First, the transmission structure of the travel drive system will be described.

As shown in FIG. 2 , the motive power of the engine E is transmitted to the pump shaft 60a which is the speed change input shaft of the hydrostatic continuously variable transmission 6 via the belt transmission mechanism 62, and the hydraulic pump 60 is rotationally driven.

The motor shaft 61a, which is the speed change output shaft of the hydrostatic continuously variable transmission 6, is connected to the first speed change shaft 31 (corresponding to the upper speed change shaft) in the case body 30 of the main case part 3 . .

As shown in FIG. 3 , the first shift shaft 31 is equipped with an upper low-speed gear 31a of a travel drive system and an upper high-speed gear 31b to rotate integrally, and is used for reduction transmission of a working device drive system. The output gear 31c is provided so that it may rotate integrally.

An end of the first shift shaft 31 on the opposite side to the side connected to the motor shaft 61a penetrates the side wall 30b of the case body 30 and protrudes to the outside of the case body 30 ( 33a) is inserted into the cylindrical boss part 33b of the extension shaft 33 provided with it, and is pivoted so that a relative rotation is possible. The extension shaft 33 is provided with a transplanted transmission gear 33c on the outer periphery of the tube boss portion 33b, and penetrates the side wall 30b to the first shaft portion 33a protruding outward of the case body 30 . The external gear 36a is supported rotatably integrally.

The output gear 31c for reduction transmission and the implanted transmission gear 33c are meshed with the relay gear 32f which was rotatably and loosely fitted to the 2nd transmission shaft 32 mentioned later.

A second shift shaft 32 (corresponding to a lower shift shaft) having a shaft center parallel to the first shift shaft 31 is axially supported by the case body 30 . On this second shift shaft 32, a lower low-speed gear 32a (corresponding to a lower gear) meshing with the upper low-speed gear 31a, and a lower high-speed gear 32b meshing with the upper high-speed gear 31b ( (corresponding to the lower gear) is rotatably supported by the second shift shaft 32 .

A gear pair of the upper low speed gear 31a and the lower low speed gear 32a, and a gear pair of the upper high speed gear 31b and the lower high speed gear 32b, and a second shift shaft 32 between these gear pairs ) by providing the shaft-supported shift member 34, the auxiliary transmission mechanism 3A is constituted.

Among the gear pairs, the combination of the upper low-speed gear 31a and the lower low-speed gear 32a is a low-speed gear pair suitable for work driving, and the combination of the upper high-speed gear 31b and the lower high-speed gear 32b is road driving. It is a gear pair suitable for high speed.

The shift member 34 is spline-fitted to the second shift shaft 32 so as to be integrally rotatable with the second shift shaft 32 and slidably supported in the axial direction of the second shift shaft 32 . have. A lower low-speed gear 32a and a lower high-speed gear 32b located on the lower side in the power transmission direction among the respective gear pairs are present on both left and right side surfaces of the shift member 34 opposite to each gear pair on the left and right sides. Engagement teeth 34a and 34b protruding in both left and right directions are provided.

In addition, each of the lower low-speed gear 32a and the lower high-speed gear 32b at a position opposite to the shift member 34 is selectively meshed with the meshing teeth 34a and 34b of the shift member 34 . Engagement recesses 32c and 32d are formed.

Among the meshing teeth 34a and 34b of the shift member 34 , the meshing teeth 34a on the side opposite to the large-diameter lower low speed gear 32a are located in the vicinity of the outer peripheral edge of the shift member 34 for the second speed change. It is formed in the location spaced apart from the outer peripheral surface of the shaft 32. As shown in FIG. The meshing teeth 34b on the side opposite to the lower high-speed gear 32b with a smaller diameter on the opposite side are formed in the vicinity of the inner peripheral edge of the shift member 34 and close to the outer peripheral surface of the second shift shaft 32. .

And, among the meshing recesses 32c and 32d, the meshing recessed part 32c formed in the lower low-speed gear 32a can be engaged with the meshing tooth part 34a on the shift member 34 side at a position opposite to this. In a shape, it is formed at a location spaced apart from the outer peripheral surface of the second shift shaft 32 . Further, the meshing recessed portion 32d formed in the lower high-speed gear 32b has a shape that can be engaged with the meshing tooth portion 34b on the shift member 34 side at a position opposite to the second shift shaft 32. It is formed in a location close to the outer peripheral surface of

The engagement recessed part 32d formed in the lower high-speed gear 32b is, as shown in FIG. 7, the shaft support hole 32e of the lower high-speed gear 32b externally fitted to the second shift shaft 32, and It is formed in a connected shape. Thereby, the meshing recessed part 32d formed in the lower high-speed gear 32b is made close to the outer peripheral surface of the 2nd speed change shaft 32 to the limit, and is formed.

The shift member 34 includes a case body ( 30) is configured to be operable from the outside.

The position at which the operating rod 34d is most press-fitted into the case body 30 is the position where the shift member 34 selects a low-speed gear pair suitable for work travel, and the operating rod 34d is most press-fitted into the case body 30 . The position withdrawn to the outside of is the position where the shift member 34 selected a high-speed gear pair suitable for road running. The state in which the shift member 34 is in the intermediate position in which neither gear pair is selected is the neutral position.

The power transmitted to the second shift shaft 32 through the shift member 34 is transmitted to the front wheel output gear 35b through the interlocking gear 35a fixed to the second shift shaft 32 . The front wheel output gear 35b is spline-fitted to the outer periphery of the right end side of the cylindrical member 35c externally fitted to the front wheel drive shaft 63 so as to be able to rotate relatively. The left end of the cylindrical member 35c is connected to the differential gear case 70 through a boss portion of the rear wheel output bevel gear 35d spline-fitted to the outer peripheral portion so as to be able to rotate integrally.

Therefore, when the front wheel output gear 35b is driven, the rear wheel output bevel gear 35d and the differential gear case 70 are rotationally driven through the cylinder member 35c. Thereby, the left and right front wheel drive shafts 63 are rotationally driven with the rotation of the differential gear case 70, and with the rotation of the rear wheel output bevel gear 35d, the rear wheel input bevel gear 64a meshed with this. ) and the rear wheel output shaft 64 (corresponding to the driving transmission shaft) are rotationally driven.

At the right end of the boss portion of the front wheel output gear 35b, a claw portion 71a for a differential gear lock is provided. In addition, at the left end of the sliding cylinder 71 that is externally fitted to the front wheel drive shaft 63, a sliding claw part 71b for the differential gear lock that can be engaged and detached from the claw part 71a for the differential gear lock is formed. have. The sliding claw portion 71b for the differential gear lock is engaged and disengaged by rotation of the differential gear lock operation pin 72 provided through the case body 30 . That is, the sliding cylinder 71 moves along the axial direction of the front wheel drive shaft 63 by the rotation operation of the differential gear lock operation pin 72, and the claw portion 71a for the differential gear lock of the front wheel output gear 35b. ) against the bond-separation function.

In the differential gear locked state in which the sliding claw portion 71b for a differential gear lock engages the claw portion 71a for a differential gear lock, the differential by the differential gear device 7 is locked.

[Working device drivetrain]

Separately from the above-mentioned travel drive system, the working device drive system which transmits power to the seedling transplantation apparatus 2 of a planting system working device is demonstrated.

Power to the seedling transplantation apparatus 2 is transmitted through the interstate transmission mechanism 4A and the transplantation clutch 8 (corresponding to the work clutch) in the interstate case unit 4 provided in the rear portion of the main case unit 3 . , is taken out from the output transmission shaft body 42 extended to the rear side from the main case part 4, and is transmitted to the seedling transplantation apparatus 2 of the back.

As shown in FIGS. 4 and 6 , the main case part 4 is provided with the main case body 40 configured as a separate body from the case body 30 of the main case part 3 . This main case main body 40 is integrally connected and fixed with respect to the main case part 3 via a connection bolt etc. (not shown). And the main case part 4 and the main case part 3 are connected in the state in which each internal space communicates with each other in the sealed state which joined the opening parts 40a, 30a formed at the mutual connection location. has been

Power transmission from the main case part 3 into the main case part 4 is a work system transmission shaft 37 provided over the left and right side walls 30b and 30b of the case body 30, and a work system transmission shaft It is performed through the bevel gear 37a fixed to 37, and the bevel gear 38 for output mesh|engaged with the bevel gear 37a.

As the working system transmission shaft 37 , a second external gear 36b provided in the axial portion of the working system transmission shaft 37 protruding to the outside of the case body 30 is provided, and the extension shaft 33 is the case body. It is meshed with the 1st external gear 36a provided in the shaft part which protrudes outward of 30, and power transmission is performed by this.

In the main case part 4, as shown in FIG. 4, the work drive shaft 41 (corresponding to a shifting operation shaft) long in the front-back direction is arrange|positioned over the front and back of the main case part 4.

The work drive shaft 41 is externally fitted to the output transmission shaft body 42 to which the transmission shaft 27 to the seedling transplantation apparatus 2 at the back is connected, and the front end side part of the output transmission shaft body 42 so that relative rotation is possible. It becomes and it is comprised with the double shaft structure by the front part normal shaft body 43 (corresponding to a normal shaft body) to which the power transmission direction upper side is transmitted.

The front end tubular shaft body 43 on the upper side of the transmission is positioned in a state in which the front end has penetrated into the case body 30 of the main case unit 3 . A spline portion is formed in a portion located at the uppermost side of the front normal shaft body 43 in the rolling direction, and the spline portion is located on the inner peripheral side of the cylinder boss of the output bevel gear 38 located in the main case portion 3 . is inserted in

As for the output bevel gear 38, the boss part outer peripheral side is supported by the ball bearing 38a provided on the case main body 30 side of the main case part 3, The front part cylindrical shaft body inserted by this into the inner peripheral side. (43) is also supported.

Further, in the ball bearing 38a provided on the side of the case body 30, a portion with a slightly larger diameter on the rear side than the portion inserted into the output bevel gear 38 among the front cylindrical shaft body 43 is internally fitted. and is supported In addition, the larger diameter site|part of the front part tubular shaft body 43 abuts against the rear end side of the inner race of the ball bearing 38a, and the position control to the front side is performed.

The front part normal shaft body 43 has a small diameter hole 43b communicating with the internal space of the main case part 3 on the front side of the large diameter hole 43a into which the output transmission shaft body 42 is inserted, and the small-diameter hole 43b and the large-diameter hole 43a of the front cylindrical shaft 43 communicate with the inner space of the main case portion 3 and the inner space of the main case portion 4 on the inner peripheral side is made into a passage.

In the outer periphery of the output transmission shaft body 42 on the rear side from the location where the front part cylindrical shaft body 43 exists, the intermediate cylindrical body 44 (corresponding to a normal shaft body) and the rear cylindrical body 45 (normal shaft body) ) is externally fitted so that relative rotation is possible.

A torque limiter 46 is provided between the rear end of the intermediate cylindrical body 44 and the front end of the rear cylindrical body 45 .

The implanted clutch 8 is provided between the rear end of the rear cylindrical body 45 and the output transmission shaft 42 on the rear side from the rear cylindrical body 45 .

Thus, in the outer peripheral part of the output transmission shaft body 42, the intermediate cylindrical body 44 and the rear cylindrical body 45 exist in the externally fitted state so that relative rotation is possible, and this output transmission shaft body 42 is a front part cylindrical Since it exists in the inner peripheral side passage of the shaft body 43, it is easy to perform lubrication in the main case part 4 favorably.

That is, the lubricating oil existing in the inner space of the main case part 3 passes through the inner peripheral side of the cylindrical boss of the output bevel gear 38, and as shown by the broken arrow in FIG. 4, the front part normal shaft body ( From between 43 and the intermediate cylindrical body 44, between the intermediate cylindrical body 44 and the rear cylindrical body 45, and between the rear cylindrical body 45 and the output transmission shaft body 42 of the rear side, work It can be lubricated favorably, using the centrifugal force accompanying rotation of the member rotating on the drive shaft 41. As shown in FIG.

The front cylindrical shaft body 43 has a spline part 43c formed on the outer peripheral part, and the shift gear 47 externally fitted to the spline part 43c is equipped so that integral rotation and sliding movement are possible.

The shift gear 47 is provided with a first tooth portion 47a and a second tooth portion 47b having approximate diameters slightly different in the number of teeth, and either tooth portion 47a or 47b is alternatively a driven side gear 47c. ), it is comprised so that a position change is possible along the axial direction of the front part normal shaft body 43 so that engagement is possible.

The movement range of this shift gear 47 is, as shown in FIG. 4, the state in which both the 1st tooth part 47a and the 2nd tooth part 47b are located in the main case part 4, and the 1st tooth part Operation by the day shift operation member 100 so that the front part or a part of part (47a) protrudes from the day case part 4 and can be switched to the state located in the inner space of the main case part 3 setting the range.

In the main case part 4, the shift shaft 48 positioned parallel to the work drive shaft 41 is provided. The driven gear 47c is integrally rotatably provided on the shift shaft 48 .

On the shift shaft 48, a plurality (in the figure, 3) provided in a state of constant meshing with a plurality of (three in the figure) shift gears 44a fixed to the intermediate cylindrical body 44 on the side of the output transmission shaft 42 side (3 in the figure) The shift gear 48a of each) is installed in a loosely fitted state. Then, the shift gears 44a and 48a in the normally engaged state, the shift rod 48b slidably operated within the shift shaft 48, and the positioning mechanism 48c using the detent mechanism are always engaged. The combination of the shift gears 44a and 48a in the state can be selected alternatively.

A second shift in which a combination of the first shifting unit 4B using the shift gear 47 and the driven gear 47c and the shifting gears 44a and 48a in the normally engaged state can be alternatively selected The part 4C constitutes the weekly transmission mechanism 4A.

The weekly shift operation member 100 in the weekly transmission mechanism 4A is configured as shown in FIGS. 4 and 6 .

That is, the locking pin 102 sandwiched between the first tooth portion 47a and the second tooth portion 47b is fixed to the lower end portion of the operation shaft 101 penetrating the upper wall portion of the main case portion 4, and a plate-shaped operating body 103 is provided at the upper end of the operating shaft 101 located outside the upper wall portion.

By rotating the plate-shaped operating body 103 around the axis of the operating shaft 101 , the locking pin 102 existing in the eccentric position shifts the shift gear 47 in the axial direction of the working drive shaft 41 . is configured to do so. The position around the axis of the plate-shaped operating body 103 is determined by the ball detent mechanism 104 .

The torque limiter 46 includes a support plate 46a fixed to the rear end of the intermediate cylindrical body 44, a pressure plate 46b abutting toward the support plate 46a, and a pressure plate 46b toward the support plate 46a side. A coil spring 46c for pressing is provided and configured.

The implanted clutch 8 is configured as follows.

Among the working drive shafts 41 , at the rear end of the rear cylindrical body 45 , a disk-shaped driving-side rotation member 80 that engages with the outer peripheral side splines of the rear cylindrical body 45 and rotates integrally with the rear cylindrical body 45 . ) is installed.

On the outer periphery side of the output transmission shaft body 42 extending to the rear side from the rear cylindrical body 45, it engages with the spline portion 42a formed on the outer peripheral surface of the output transmission shaft body 42, and engages the output transmission shaft body 42 ) and a driven-side rotation member 81 capable of integral rotation and positional movement in the axial direction of the output transmission shaft 42 are provided.

This driven-side rotary member 81 is pressed toward the drive-side rotary member 80 side by a biasing spring 82 , and each of the drive-side rotary member 80 and the driven-side rotary member 81 is Engagement portions 80a and 81a capable of transmitting power in a state of engagement with each other are formed on the opposing surfaces.

The biasing spring 82 includes a spring accommodating portion 81b formed on a surface opposite to the side on which the engaging portion 81a of the driven-side rotating member 81 is formed, and a spring receiving portion 81b formed on the inner surface side of the main case portion 4 . It is installed between the fixed parts. The inner end of the inner race 49a of the ball bearing 49 that supports the output transmission shaft 42 is used as the fixed portion on the inner surface side of the main case portion 4, but it must be in this position. there is no

And, the shape of the biasing spring 82 is such that the winding diameter at the end abutting the spring accommodating portion 81b in the axial direction of the work drive shaft 41 is on the side that abuts against the inner end of the inner race 49a. It is formed in a truncated cone shape set larger than the winding diameter.

Among the biasing springs 82 , the winding diameter on the side contacting the inner end of the inner race 49a is approximately equal to or slightly larger than the outer diameter of the externally fitted output transmission shaft 42 . Therefore, the end position can be positioned using the inner edge part of the inner race 49a of the ball bearing 49 which supports the output transmission shaft body 42, without requiring a positioning means in particular.

As shown in FIG. 4, the driven side rotating member 81 is spaced apart from the driving side rotating member 80 by resisting the urging force of the biasing spring 82 by the clutch operation member 83 in contact with the outer periphery. It is operated to the side, and the outer peripheral part is provided with the engaging part 81c to which the clutch operation member 83 engages.

The clutch operation member 83 has an operation pin 84 penetrating the upper wall portion of the main case portion 4 , and engages the driven side rotating member 81 at the lower end of the operation pin 84 . The operation part 84a which contacts with the part 81c and moves the driven-side rotation member 81 in the axial direction of the output transmission shaft body 42 with rotation operation of the operation pin 84 is formed.

The clutch operation member 83 operates a portion exposed to the outside of the main case portion 4 among the operation pins 84 operated around the rotation axis p1 in a direction intersecting the axis of the work drive shaft 41 . An operation plate 85 for rotating the operation pin 84 is provided at the axial end of the pin 84 . And the operation guide member 86 which guides the rotation operation around the said rotation axis p1 of the operation plate 85 while supporting a part of the operation plate 85 so that it may be fitted from up and down is a main case It is provided outside the part (4).

As a result, the operation pin 84 is restricted from positional movement in the direction along the rotation axis p1 by the operation plate 85 , and the operation range around the rotation axis p1 is limited to the operation plate 85 and the operation plate 85 . It is regulated by the abutment of the operation guide member 86 .

The position of the spring receiving portion 81b of the driven side rotation member 81 with respect to the engagement location of the engagement portion 81c of the driven side rotation member 81 at the lower end of the operation pin 84 is , on the inner side in the radial direction of the driven-side rotation member 81 , and in the axial direction of the work drive shaft 41 , the engagement portion rather than the engagement portion of the engagement portion 81c of the driven-side rotation member 81 . It is provided at a location near the opposing surface side where 81a is formed.

In this way, the spring accommodating portion 81b is on the radially inward side of the engagement portion of the engagement portion 81c of the operation pin 84 and the driven-side rotation member 81, and the engagement portion 81a It has a shape that is greatly concave so that it is close to the side on which it exists. Thereby, it is avoided that the axial length of the working drive shaft 41 of the biasing spring 82 is restricted by the position of the operating pin 84 in the axial direction of the working drive shaft 41, and the main case part ( 4) can be made compact.

[fertilization drivetrain]

The fertilization apparatus drive system which branch-transfers a driving force with respect to the fertilization apparatus 9 from the above-mentioned travel drive system is comprised as follows.

As shown in FIG. 6 , on the rear side of the main case unit 3 , a branch case unit 5 configured as a separate body from the main case unit 3 is connected and fixed through an installation bolt or the like (not shown). have.

The main case part 3 and the branch case part 5 communicate with each other in the sealed state which joined the opening parts 30a, 50a formed in the mutual connection location, respectively.

As shown in FIG. 5 , the branch case part 5 intersects the input side cylindrical part 50A supporting the rear wheel output shaft 64 extending rearward from the main case part 3 and the rear wheel output shaft 64 . It is externally fitted to the branch transmission shaft 51 extending in the direction, and the output side cylindrical part 50B which supports the branch transmission shaft 51 is provided. The input-side cylindrical portion 50A and the output-side cylindrical portion 50B are constituted of an integral body having a common internal space.

A bevel gear 52 for branch output that transmits power from the rear wheel output shaft 64 to the branch transmission shaft 51 is equipped in the input side cylindrical portion 50A, and a bevel gear for fertilization that meshes with the bevel gear 52 for branch output ( 53) (corresponding to the bevel gear for branch input) is equipped in the output side cylindrical part 50B.

The bevel gear 52 for branch output is provided in the input side cylindrical part 50A on the side closer to the main case part 3 rather than the branch transmission shaft 51. As shown in FIG.

A rear wheel output shaft 64 having a rear wheel input bevel gear 64a meshed with the rear wheel output bevel gear 35d at the front end, the front end of the ball provided in the case body 30 of the main case unit 3 It is supported by the bearing 39 , and its rear end is supported by a ball bearing 54 provided near the rear end of the branch case portion 5 .

In this rear wheel output shaft 64, a step portion 64C (corresponding to a positioning portion) is provided at an intermediate position in the axial direction, and a front portion corresponding to an upper side of the step portion 64C in the transmission direction is larger than the step portion 64C. It is the diameter shaft part 64A, and the rear side corresponding to the lower side in the rolling direction from the step part 64C is formed as the small diameter shaft part 64B.

The stepped portion 64C is formed near the boundary between the main case portion 3 and the branched case portion 5, and a spline portion 64D is formed in a portion close to the stepped portion 64C among the small-diameter shaft portions 64B. It is formed, and the bevel gear 52 for branch output is spline-fitted to this spline part 64D.

The opening 50a of the branch case part 5 formed at a location opposite to the main case part 3 has an inner diameter through which the branch output bevel gear 52 supported by the rear wheel output shaft 64 can be inserted.

Therefore, when the rear wheel output shaft 64 is built into the branch case part 5, it can be built into the branch case part 5 in a state in which the bevel gear 52 for branch output is supported on the rear wheel output shaft 64 in advance. , the convenience of assembly and disassembly can be achieved.

The branch transmission shaft 51 equipped with the bevel gear 53 for fertilization, which meshes with the bevel gear 52 for branch output supported by the rear wheel output shaft 64 at the input side end, is in a posture orthogonal to the rear wheel output shaft 64 . is placed. Then, the input side end is inserted and pulled out from the output side opening 50b side formed in the output side cylindrical portion 50B of the branch case portion 5, and the output side end portion is moved outward from the output side opening 50b of the output side cylindrical portion 50B. It is supported in a protruding state.

The interlocking shaft (not shown) to the fertilization apparatus 9 is connected to the protrusion part of the branch transmission shaft 51 which protruded outward from this output side opening 50b.

In addition, the branch transmission shaft 51 is a location corresponding to the insertion limit position into the output side cylindrical part 50B, and an input side end abuts against the rear wheel output shaft 64 . That is, when the branch transmission shaft 51 is inserted into the output side cylindrical portion 50B from the output side opening 50b until the insertion limit position is reached, the input side cylindrical portion ( The position of the rear wheel output shaft 64 with respect to 50A is determined.

The bevel gear 53 for fertilization is supported so that relative rotation is possible with respect to the branch transmission shaft 51, and the branch transmission shaft 51 and the bevel gear 53 for fertilization are the fertilization clutch 55 (corresponding to a work clutch). It is configured to be able to be combined and separated through the

The fertilization clutch 55 is equipped with the normal shift member 56 which spline-fitted the spline part formed in the outer peripheral surface of the branch transmission shaft 51. As shown in FIG. And the claw part 56a formed in the opposing surface of this normal shift member 56 with respect to the bevel gear 53 for fertilization, and the bevel gear 53 side for fertilization opposing the normal shift member 56 is engaged. By engaging and disengaging the engagement recessed part 53a, the state which transmits the rotation of the bevel gear 53 for fertilization to the branch transmission shaft 51, and the state which cut|disconnects transmission are comprised so that switching is possible.

The normal shift member 56 is pressed against the bevel gear 53 for fertilization by a coil spring 57, and the normal shift member 56 is spaced apart from the bevel gear 53 for fertilization by resisting this pressing force. A clutch operation shaft 58 operated to the side is provided through the output-side cylindrical portion 50B.

[Axle Case]

As shown in FIG. 10, the transmission shaft 65 along the vertical direction is installed in the axle case 16 to which the driving force is transmitted from the front wheel drive shaft 63, and is located on the upper side of the transmission shaft 65. The upper bevel gear pair 66 of the upper transmission side and the lower bevel gear pair 67 of the transmission lower side positioned on the lower side of the transmission shaft 65 are provided.

Each of these bevel gear pairs 66 and 67 is reduced in transmission. And the reduction ratio in the lower bevel gear pair 67 of the transmission lower side is set larger than the upper bevel gear pair 66 of the transmission upper side.

Although not shown, also in the axle case 19 which transmits the driving force to the rear wheel 11R, the transmission shaft 65 which is diagonally directed rearward downward from the upper side is provided. And also on the upper side and the lower side of this transmission shaft 65, in the structure similar to the upper bevel gear pair 66 and the lower bevel gear pair 67 on the front wheel 11F side, the reduction ratio at the transmission lower side is reduced. A large configuration is adopted.

[Other Embodiment 1]

In the said embodiment, although the main case part 4 was shown as a work case part, it is not limited to this. For example, when the working machine is used for a seeding machine equipped with a direct sowing device, the working case part becomes a working case part for changing the sowing interval by the direct sowing device.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 2]

In the said embodiment, although the fertilization apparatus 9 was used as a granular material supply apparatus, it is not limited to this.

For example, you may supply drugs, such as a herbicide and an insect repellent.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 3]

In the said embodiment, although the technique applied to the implanted clutch 8 was shown as a work clutch, it is not limited to this. For example, although not shown, you may comprise the fertilization|fertilization clutch 55 as the thing of the structure similar to the transplant clutch 8 as a work clutch mentioned above.

As for the other configuration, the same configuration as in the above-described embodiment may be adopted.

[Other Embodiment 4]

In the said embodiment, although the thing of the structure comprised by the three examples of the front part cylindrical shaft 43, the intermediate|middle cylindrical body 44, and the rear cylindrical body 45 was illustrated as a normal shaft body, it is not limited to this structure.

For example, as a normal shaft, the structure using only the front part cylindrical shaft 43, or the structure by the combination of more cylindrical bodies may be sufficient.

As for the other configuration, the same configuration as in the above-described embodiment may be adopted.

[Other Embodiment 5]

In the said embodiment, although the rice transplanter provided with the week case part 4 was shown as a planting operation case part, it is not limited to this. For example, when it uses for the seeding machine provided with the direct sowing apparatus, a planting work case part turns into a work case part for changing the sowing interval by a direct sowing apparatus.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 6]

In the said embodiment, although the fertilization apparatus 9 was used as a granular material supply apparatus, it is not limited to this.

For example, you may supply drugs, such as a herbicide and an insect repellent.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 7]

In the above embodiment, although the structure having both the planting work case part and the branch case part and each being detachable from the openings 40a and 50a was exemplified, only the planting work case part can be detached from the opening 40a. It may have been made to be possible.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 8]

In the above embodiment, the meshing recesses 32c and 32d of the lower high-speed gear 32b in the pair of high-speed gears suitable for road running in the auxiliary transmission mechanism 3A are formed with the shaft support hole 32e and Although what was formed in the following shape was illustrated, it does not necessarily need to be this shape.

For example, the shaft support hole 32e is a perfectly round hole, and the engaging recesses 32c and 32d are close to the shaft support hole 32e, but an independent concave shape different from the shaft support hole 32e. may be formed with

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 9]

EMBODIMENT OF THE INVENTION Hereinafter, other embodiment of this invention is described based on description of drawing.

[Overall composition]

In Fig. 11, the left side of a riding type rice transplanter is shown as an example of a power receiving machine equipped with a working device such as a seedling transplantation device for transplanting seedlings to the ground or a direct sowing device for sowing rice seeds into the ground (seeder system working device). has been

This riding-type rice transplanter is provided below the body frame 1010, as a traveling driving device, a pair of left and right front wheels 1011F capable of steering and driving, and a pair of left and right rear wheels 1011R that can be driven, and the body frame A self-propelled traveling body 1001 in which front wheels 1011F and rear wheels 1011R are driven by receiving power from an engine E100 mounted on 1010 is provided.

In the traveling body 1001 , a driving unit 1013 in which the engine E100 is incorporated is provided on the driving unit floor 1014 in a front portion of the body. Boarding driving having a steering handle 1015 for steering the front wheel 1011F and a driver's seat 1012 on the driver's floor 1014 in the front-rear central part of the traveling body 1001 from the rear side of the driving unit 1013 and the driver's seat 1012 Supplements are available.

A fertilization device 1009 (corresponding to a powder or granular material supply device) is mounted on the rear portion of the driver's seat 1012 . The fertilization apparatus 1009 feeds out the fertilizer stored in the fertilizer tank 1090 each predetermined amount from a feeding device (not shown), and is equipped to the seedling transplantation device 1002 via a supply path (not shown). sent to, and configured to be supplied in packaging. On the rear side of the traveling body 1001 , the seedling transplantation apparatus 1002 is supported so as to be able to move up and down via a link mechanism 1025 having a hydraulic cylinder 1026 for raising/lowering operation.

The riding type rice transplanter comprised in this way performs the seedling transplant operation|work of seedlings, such as rice, with respect to the field with the seedling transplantation apparatus 1002.

In the front part of the traveling body 1001, the spare seedling loading stand 1017 is arrange|positioned at the left-right both sides of the driving|motive part 1013 with the space|interval of the left-right direction enough to be able to move back and forth. In the rear part of the traveling body 1001, the seedling transplantation apparatus 1002 is supported so that raising/lowering is possible via the link mechanism 1025 which has the hydraulic cylinder 1026 for raising/lowering operation.

The riding type rice transplanter comprised in this way performs the seedling transplant operation|work of seedlings, such as rice, with respect to the field with the seedling transplantation apparatus 1002.

The seedling transplantation apparatus 1002 is configured in a four-row type, and a transmission case 1021, a transplantation case 1022 supported rotatably on the right and left lateral sides of the rear portion of the transmission case 1021, is transplanted. A pair of transplanting arms 1023 (grafting hook drive mechanism) provided at both ends of the case 1022 , a grounding float 1024 , and a seedling loading table 1020 on which seedlings are placed are provided. As the seedling loading table 1020 is driven to the left and right reciprocating lateral feeding, the transplant case 1022 is rotationally driven, and the transplanting arms 1023 alternately take out the seedlings from the lower part of the seedling loading table 1020, and It is designed to be implanted on the floor.

While the transmission case M100 which pivotally supported the front wheel 1011F is connected and fixed to the front part of the body frame 1010 in the traveling body 1001, in the rear part of the body frame 1010, a rear wheel An axle case 1019 equipped with 1011R on the left and right is supported. A front frame 1010F is extended toward the front from the transmission case M100, and the engine E100 is mounted in the lateral direction on this front frame 1010F.

12 and 13 , on both left and right sides of the transmission case M100, an axle case 1016 extends toward both left and right outer sides, and left and right front wheels 1011F and 1011F are provided.

The axle case 1019 of the rear wheel 1011R is elastically supported on the lower side of the pair of left and right front and rear frames 1010A and 1010A, left and right, respectively, through a suspension spring 1018 to move up and down separately, so that left and right rolling operation is possible installed.

[Power transmission system]

A power transmission structure in the transmission case M100 to which the power of the engine E100 is transmitted will be described.

The motive power of the engine E100 input to the transmission case M100 is a traveling drive system for driving the front wheels 1011F, the rear wheels 1011R, etc. in the transmission case M100, and a seedling transplantation device as a planting system working device. (1002) or a work device drive system for driving a seeding device (not shown), and a fertilization drive system for driving the fertilization device 1009 are outputted.

The transmission case M100 includes a main case portion 1003 containing an auxiliary transmission mechanism 1003A of the travel drive system, etc., and a main case portion 1004 disposed on the rear side of the main case portion 1003 (sealing operation). Corresponding to the case part) and a branch case part 1005 are provided.

The weekly case unit 1004 has a built-in weekly transmission mechanism 1007 (corresponding to a wave system transmission mechanism) that shifts and transmits the power output from the main case unit 1003 to the seedling transplantation apparatus 1002, and the branch case The unit 1005 incorporates a branch transmission mechanism 1005A for branching transmission of the power output from the main case portion 1003 to the fertilization apparatus 1009 .

The motive power of the engine E100 is transmitted to the pump shaft 1060a of the hydrostatic continuously variable transmission device 1006 attached to the outer wall portion of the main case portion 1003 of the transmission case M100, It is input from the motor shaft 1061a of the apparatus 1006 to the inside of the case body 1030 in the main case part 1003. That is, the hydrostatic continuously variable transmission 1006 is used as a continuously variable main transmission, and the power output from the main transmission is further shifted in the transmission case M100.

[Travel drivetrain]

First, the transmission structure of the travel drive system will be described.

As shown in FIG. 12 , the power of the engine E100 is transmitted to the pump shaft 1060a, which is the speed change input shaft of the hydrostatic continuously variable transmission device 1006, through the belt transmission mechanism 1062, and the hydraulic pump 1060 is rotationally driven.

The motor shaft 1061a, which is a speed change output shaft of the hydrostatic continuously variable transmission device 1006, is connected to the first speed change shaft 1031 (corresponding to the upper speed change shaft) in the case body 1030 of the main case part 1003. .

13, the first shift shaft 1031 is equipped with an upper low-speed gear 1031a of the travel drive system and an upper high-speed gear 1031b to rotate integrally, and the output for reduction transmission of the working device drive system The gear 1031c is provided so as to rotate integrally.

An end of the first shift shaft 1031 on the opposite side to the side connected to the motor shaft 1061a penetrates the sidewall 1030b of the case body 1030 and protrudes to the outside of the case body 1030 . ) is inserted into the cylindrical boss portion 1033b of the extension shaft 1033 having a , and is pivotally supported so as to be relatively rotatable. The extension shaft 1033 is provided with a transplanted transmission gear 1033c on the outer periphery of the cylindrical boss portion 1033b, penetrates the side wall 1030b and projects to the outside of the case body 1030 through the shaft portion 1033a. An external gear 1036a is supported so as to be able to rotate integrally.

The output gear 1031c for reduction transmission and the implanted transmission gear 1033c are meshed with a relay gear 1032f which is rotatably loosely fitted to a second transmission shaft 1032 described later.

A second shift shaft 1032 (corresponding to a lower shift shaft) having a shaft center parallel to the first shift shaft 1031 is axially supported by the case body 1030 . On this second shift shaft 1032, a lower low-speed gear 1032a (corresponding to a lower gear) meshing with the upper low-speed gear 1031a, and a lower high-speed gear 1032b meshing with the upper high-speed gear 1031b ( (corresponding to the lower gear) is rotatably supported by the second shift shaft 1032 .

A second shift shaft 1032 between the pair of the upper and lower high speed gears 1031a and 1032a and the pair of upper and lower high speed gears 1031b and 1032b, and between these gear pairs. A sub-transmission mechanism 1003A is constituted by providing the shift member 1034 supported by the shaft.

Among the gear pairs, the combination of the upper low-speed gear 1031a and the lower low-speed gear 1032a is a low-speed gear pair suitable for work driving, and the combination of the upper high-speed gear 1031b and the lower high-speed gear 1032b is suitable for road driving. A suitable high speed gear pair.

The shift member 1034 is spline-fitted to the second shift shaft 1032 , and is supported so that it can rotate integrally with the second shift shaft 1032 and slidably in the axial direction of the second shift shaft 1032 . . On both left and right side surfaces of the shift member 1034 opposing each gear pair on the left and right sides, a lower low speed gear 1032a and a lower high speed gear 1032b located on the lower side in the power transmission direction among the respective gear pairs are present on the left and right sides Engagement teeth 1034a, 1034b projecting in both directions are provided.

In addition, each of the lower low-speed gear 1032a and the lower high-speed gear 1032b at a position opposite to the shift member 1034 is selectively meshed with the meshing teeth 1034a and 1034b of the shift member 1034 . Engagement recesses 1032c and 1032d are formed.

Among the meshing teeth 1034a and 1034b of the shift member 1034 , the meshing tooth 1034a on the side opposite to the lower low speed gear 1032a having a larger diameter is located in the vicinity of the outer peripheral edge of the shift member 1034 , the second shift shaft It is formed in a location spaced apart from the outer peripheral surface of (1032). The meshing teeth 1034b on the side opposite to the lower high-speed gear 1032b with a smaller diameter on the opposite side are formed in the vicinity of the inner peripheral edge of the shift member 1034 and in a location close to the outer peripheral surface of the second shift shaft 1032. .

And the meshing recessed part 1032c formed in the lower low-speed gear 1032a among the meshing recessed parts 1032c and 1032d is a shape which can mesh|engage with the meshing tooth part 1034a on the side of the shift member 1034 at the position opposite to this. As such, it is formed at a location spaced apart from the outer peripheral surface of the second shift shaft 1032 . Further, the meshing recessed portion 1032d formed in the lower high-speed gear 1032b has a shape that can be engaged with the meshing tooth portion 1034b on the side of the shift member 1034 at a position opposite to this, and the second shift shaft 1032 It is formed in a location close to the outer peripheral surface of

The engagement recessed portion 1032d formed in the lower high-speed gear 1032b is, as shown in FIG. 14, the shaft support hole 1032e of the lower high-speed gear 1032b externally fitted to the second shift shaft 1032 and It is formed in a connected shape. Thereby, the meshing recessed part 1032d formed in the lower high-speed gear 1032b is made to approach the outer peripheral surface of the 2nd transmission shaft 1032 to the limit, and is formed.

The shift member 1034 is a case body 1030 using an operation plate 1034c that supports the shift member 1034 while holding it, and an operation rod 1034d integrally fixed with the operation plate 1034c. ) so as to be operable from the outside.

The position at which the operating rod 1034d is most press-fitted into the case body 1030 is the position at which the shift member 1034 selects a low-speed gear pair suitable for work travel, and the operating rod 1034d is most press-fitted into the case body 1030. The position withdrawn to the outside of is a position where the shift member 1034 selects a high-speed gear pair suitable for road running. The state in which the shift member 1034 is in the intermediate position in which neither gear pair is selected is the neutral position.

Power transmitted to the second shift shaft 1032 through the shift member 1034 is transmitted to the front wheel output gear 1035b through the interlocking gear 1035a fixed to the second shift shaft 1032 . The front-wheel output gear 1035b is spline-fitted to the outer peripheral part of the right end side of the cylindrical member 1035c externally fitted to the front-wheel drive shaft 1063 so that a relative rotation was possible. The left end of the cylinder member 1035c is connected to the differential gear case 1066 so as to be able to rotate integrally through the boss portion of the bevel gear 1035d for rear wheel output spline-fitted to the outer peripheral portion.

Therefore, when the front wheel output gear 1035b is driven, the rear wheel output bevel gear 1035d and the differential gear case 1066 are rotationally driven through the cylinder member 1035c. Thereby, the left and right front wheel drive shafts 1063 are rotationally driven with the rotation of the differential gear case 1066, and with the rotation of the rear wheel output bevel gear 1035d, the rear wheel input bevel gear 1064a meshed with this. ) and the rear wheel output shaft 1064 (corresponding to the driving transmission shaft) are rotationally driven.

A claw portion 1067a for a differential gear lock is provided at the right end of the boss portion of the front wheel output gear 1035b. Also, at the left end of the sliding cylinder 1067 that is externally fitted to the front wheel drive shaft 1063, a sliding claw portion 1067b for the differential gear lock that can be engaged and detached from the claw portion 1067a for the differential gear lock is formed. have. The sliding claw portion 1067b for the differential gear lock is engaged and disengaged by rotation of the differential gear lock operation pin 1068 provided through the case body 1030 . That is, the sliding cylinder 1067 moves along the axial direction of the front wheel drive shaft 1063 by the rotation operation of the differential gear lock operation pin 1068, and the claw portion 1067a for the differential gear lock of the front wheel output gear 1035b. ) against the bond-separation function.

In the differential gear locked state in which the sliding claw portion 1067b for a differential gear lock is engaged with the claw portion 1067a for a differential gear lock, the differential by the differential gear device 1065 is locked.

[Working device drive system]

A work device drive system that transmits power to the seedling transplantation device 1002 of the planting system working device separately from the travel drive system described above will be described.

Power to the seedling transplantation apparatus 1002 is transmitted through the interstate transmission mechanism 1007 and the transplant clutch 1008 (corresponding to the work clutch) in the main case unit 1004 provided in the rear portion of the main case unit 1003 . , is taken out from the output transmission shaft body 1042 extended rearward from the main case part 1004, and is transmitted to the seedling transplantation apparatus 1002 of the back.

15 and 16 , the main case unit 1004 includes a main case body 1040 configured as a separate body from the case body 1030 of the main case unit 1003 . This main case body 1040 is integrally connected and fixed with respect to the main case part 1003 through a connection bolt or the like (not shown). Then, the main case part 1004 and the main case part 1003 are connected in a sealed state in which the openings 1040a and 1030a formed at each other's connection points are joined to each other, and in a state in which the respective internal spaces are in communication with each other. has been

Power transmission from the main case unit 1003 to the main case unit 1004 is a work system transmission shaft 1037 provided over the left and right side walls 1030b and 1030b of the case body 1030, and a work system transmission shaft This is performed via a bevel gear 1037a fixed to 1037 and a bevel gear 1038 for output that meshes with the bevel gear 1037a.

As the working system transmission shaft 1037 , a second external gear 1036b provided on the shaft portion of the working system transmission shaft 1037 protruding to the outside of the case body 1030 is attached to the case body of the extension shaft 1033 . It is meshed with the 1st external gear 1036a provided in the shaft part which protrudes outward of 1030, and power transmission is performed by this.

In the main case part 1004, as shown in FIG. 16, the work drive shaft 1041 (corresponding to a shift operation shaft) long in the front-back direction is arrange|positioned over the front and back of the main case part 1004.

The work drive shaft 1041 is externally fitted so as to be relatively rotatable to the output transmission shaft 1042 to which the transmission shaft 1027 to the seedling transplantation apparatus 1002 at the rear is connected, and the front end portion of the output transmission shaft 1042 . It is configured as a partial double shaft structure by the normal shaft 1043 to which the power of the upper side in the transmission direction is transmitted.

The front end of the normal shaft body 1043 positioned above the transmission is arranged in a state that penetrates into the case body 1030 of the main case part 1003 . A spline portion is formed in a portion located on the uppermost side of the normal shaft body 1043 in the rolling direction, and the spline portion is inserted into the spline portion on the inner peripheral side of the cylindrical boss of the output bevel gear 1038 located in the main case portion 1003. has been

The output bevel gear 1038 is supported by a ball bearing 1038a provided on the case body 1030 side of the main case part 1003 on the outer periphery of the boss, and thus the normal shaft body 1043 inserted into the inner periphery. is also supported.

In addition, in the ball bearing 1038a provided on the side of the case body 1030, a portion with a slightly larger diameter on the rear side than the portion inserted into the output bevel gear 1038 among the normal shaft body 1043 is internally fitted and supported. have. Further, a larger diameter portion of the normal shaft 1043 is in contact with the rear end side of the inner race in the ball bearing 1038a. Thereby, the position control to the front side of the normal shaft body 1043 is performed.

In the normal shaft body 1043, a small diameter hole 1043b communicating with the internal space of the main case portion 1003 is formed on the front side of the large diameter hole 1043a into which the output transmission shaft body 1042 is inserted. The small-diameter hole 1043b and the large-diameter hole 1043a of the normal shaft 1043 serve as an inner circumferential passage that communicates with the inner space of the main case portion 1003 and the inner space of the main case portion 1004 . .

The intermediate cylindrical body 1044 and the rear cylindrical body 1045 are externally fitted so that relative rotation is possible in the outer peripheral part of the output transmission shaft body 1042 in the rear side rather than the location where the normal shaft body 1043 exists.

A torque limiter 1046 is provided between the rear end of the intermediate cylindrical body 1044 and the front end of the rear cylindrical body 1045 .

The implanted clutch 1008 is provided between the rear end of the rear cylindrical body 1045 and the output transmission shaft 1042 on the rear side of the rear cylindrical body 1045 .

In this way, on the outer periphery of the output transmission shaft body 1042, the intermediate cylindrical body 1044 and the rear cylindrical body 1045 are externally fitted in a relatively rotatable state, and this output transmission shaft body 1042 is a normal shaft body ( Since it exists in the inner peripheral side passage of 1043), it is easy to perform lubrication in the main case part 1004 favorably.

That is, the lubricating oil existing in the inner space of the main case part 1003 flows in through the inner peripheral side of the barrel boss of the output bevel gear 1038, and as shown by the broken line arrow in FIG. 16, the normal shaft body 1043 and From between the intermediate cylindrical body 1044, between the intermediate cylindrical body 1044 and the rear cylindrical body 1045, and between the rear cylindrical body 1045 and the output transmission shaft body 1042 on the rear side, rotating on the working drive shaft 1041 It can be lubricated favorably, using the centrifugal force accompanying rotation of a member.

[Weekly Transmission Mechanism]

The weekly transmission mechanism 1007 will be described.

The weekly transmission mechanism 1007 includes a first transmission unit 1007A positioned above the transmission and a second transmission unit 1007B located below the transmission. The first transmission unit 1007A performs high and low two-speed shifting, and the second transmission unit 1007B performs three shifts of high, medium, and low, so that the shift is performed in a total of 6 shift stages. .

In the first transmission unit 1007A, the shift gear 1047 provided on the normal shaft body 1043 of the working drive shaft 1041 and the shift shaft 1048 positioned parallel to the working drive shaft 1041 are fixed to the front end portion. A supported driven side gear 1048a is provided.

The normal shaft body 1043 has a spline part 1043c formed on the outer peripheral part, and the shift gear 1047 externally fitted to the spline part 1043c is equipped so that integral rotation and sliding movement are possible. The shift gear 1047 has first teeth 1047a and second teeth 1047b of approximate diameters slightly different in the number of teeth, and either tooth 1047a, 1047b is alternatively attached to the driven side gear 1048a. It is comprised so that a position change is possible along the axial direction of the normal shaft body 1043 so that engagement is possible.

The movement range of the shift gear 1047 is, as shown in FIG. 16, a second shift position in which both of the first teeth 1047a and the second teeth 1047b are located in the main case portion 1004, and the second shift position; All or part of the one-tooth portion 1047a is configured such that the shift operation position can be switched to a first shift position that protrudes from the main case part 1004 and is located in the inner space of the main case part 1003 . The operation range by the weekly shift operation member 1100 is set so that the shift gear 1047 can be moved across the first shift position and the second shift position.

In addition, the shift gear 1047 has a gap between the first tooth 1047a and the second tooth 1047b that can be inserted in a state in which the locking pin 1102 of the weekly shift operation member 1100 to be described later is inserted. has been

And, the shift gear 1047 is provided with a boss portion 1047c that protrudes toward the front side than the first tooth portion 1047a, and toward the rear side of the second tooth portion 1047b, the boss portion 1047c A significant part is not installed. That is, in the shift gear 1047, the boss portion 1047c is provided only on the front end side, which is one end, among the ends in the front-rear direction. The protrusion length of the boss portion 1047c is set so as to prevent the shift gear 1047 from being assembled in the reverse direction in the front-rear direction with respect to the normal shaft body 1043 .

That is, when the shift gear 1047 is assembled in the reverse direction in the front-rear direction with respect to the normal shaft body 1043, even if the first tooth 1047a is operated to the engaging side with the driven-side gear 1048a, the boss of the shift gear 1047 The end of the portion 1047c abuts against the front end 1044a of the intermediate cylindrical body 1044, so that the first tooth 1047a cannot be moved to the engaging position with the driven gear 1048a.

In this way, since the protrusion length of the boss portion 1047c is set, the fact that the boss portion 1047c is provided only at one end portion serves as a means for preventing assembly of the shift gear 1047 in the reverse direction.

In the main case portion 1004 , a shift shaft 1048 (corresponding to an input-side transmission shaft) positioned parallel to the work drive shaft 1041 is provided. A second transmission unit 1007B is provided across the transmission shaft 1048 and the output transmission shaft 1042 of the work drive shaft 1041 .

The second transmission unit 1007B includes a plurality of (three in the drawing) transmission gears 1049 (corresponding to an electric gear) supported by the transmission shaft 1048 at a transmission lower side than the driven gear 1048a. and a plurality (three in the figure) fixed to the intermediate cylindrical body 1044 (corresponding to the output-side transmission shaft) that is externally fitted to the output transmission shaft body 1042 in a state of constant meshing with the transmission gear 1049 A gear pair by a driven transmission gear 1044b (corresponding to an electric gear) is provided.

The shift gear 1049 supported by the shift shaft 1048 is installed in a loosely inserted state so as to be rotatable relative to the shift shaft 1048 .

Between the plurality of shift gears 1049 and the plurality of driven shift gears 1044b in this normally engaged state, the plurality of shift gears 1049 are slid within the shift shaft 1048 by the shift operation body 1070 . ) is selected, the shift power is transmitted to the output transmission shaft 1042 side through the gear pair.

That is, with respect to the driven transmission gear 1044b in meshing state with the transmission gear 1049 selected by the speed change operation body 1070, the rotation of the shift shaft 1048 is driven by the transmission gear 1049 in meshing state with each other. It is transmitted as shift power according to the gear ratio of the shift gear 1044b.

The shift operation body 1070 includes a shift key portion 1071 having a locking protrusion 1071a configured to be able to engage and disengage with respect to a locking engagement recess 1049a formed on the inner peripheral side of each shift gear 1049; , by sliding the position of the locking projection 1071a of the shift key part 1071 in the axial direction of the shift shaft 1048 to select the engagement position with respect to the shift gear 1049 as the engagement target and a slide operation unit 1072 to

Further, there is provided an elastic pressing mechanism 1073 for pressing the engaging projection 1071a of the shift key portion 1071 against the engaging recess 1049a on the inner peripheral side of the shift gear 1049 to be engaged.

As shown in FIGS. 16 and 17 , the shift key portion 1071 and the slide operation unit 1072 are disposed in an outer peripheral groove 1072a formed in the front end portion of the slide operation unit 1072 at the rear end of the shift key portion 1071 . The side protrusion pieces 1071b are connected by being engaged.

Accordingly, as the slide operation unit 1072 is pushed back and forth in the axial direction, the shift key portion 1071 also moves forward and backward in the same direction.

The state shown in FIG. 16 has shown the state which press-fitted the slide operation part 1072 most into the inside of the main case main body 1040. As shown in FIG. In this state, the locking protrusion 1071a of the shift key portion 1071 is engaged with the engagement concave portion 1049a of the shift gear 1049 on the frontmost side among the plurality of shift gears 1049, and the shift shaft ( The rotational power of 1048 is transmitted to the shift gear 1049 on the frontmost side.

The state in which the shift gear 1049 on the frontmost side is selected is the low-speed transmission position in which the second transmission part 1007B transmits the rotation of the shift shaft 1048 to the output transmission shaft 1042 side at the lowest speed.

The shift gear 1049 on the foremost side existing in the low-speed transmission position is constituted by an eccentric gear, and is meshed with a driven shift gear 1044b on the foremost side on the side of the intermediate cylindrical body 1044 composed of the eccentric gear in the same way. .

In the transmission state in this low-speed transmission position, the driving speed of the transplanting arm 1023 in the seedling transplantation apparatus 1002 with respect to the traveling speed becomes the lowest speed, and the diurnal pitch is the longest in the second transmission part 1007B. lose At this time, the driving torque of the shift gear 1049 by the shift shaft 1048 may be the smallest.

In addition, in the transmission state in this low-speed transmission position, the rotation of the transmission shaft 1048 is transmitted to the intermediate|middle cylindrical body 1044 side in the transmission state at inconstant speed. This is so that the driving speed of the transplant arm 1023 becomes the lowest speed, so that the hook during transplantation can be avoided as far as possible from being dragged in the mud of the paddy field. That is, in the driving rotation trajectory of the implanted arm 1023, the driving speed in the range in which the hook exists in the mud is partially increased, so that the hook can quickly get out of the mud.

The state shown in FIG. 17 has shown the state in which the slide operation part 1072 was pulled out most to the outer side of the main case main body 1040. As shown in FIG. In this state, the locking protrusion 1071a of the shift key portion 1071 is engaged with the engagement concave portion 1049a of the shift gear 1049 on the rearmost side among the plurality of shift gears 1049, and the shift shaft 1048 ) to transmit the rotational power of the shift gear 1049 on the rearmost side.

The state in which the shift gear 1049 on the rearmost side is selected is the high-speed transmission position in which the second transmission part 1007B transmits the rotation of the shift shaft 1048 to the output transmission shaft 1042 side at the highest speed. In the transmission state in this high-speed transmission position, the drive speed of the transplanting arm 1023 in the seedling transplantation apparatus 1002 with respect to a traveling speed becomes relatively quick, and a diurnal pitch becomes shortest in the 2nd transmission part 1007B. . At this time, the driving torque of the shift gear 1049 by the shift shaft 1048 becomes the largest.

Although not shown, the intermediate position between the state in which the slide operation part 1072 was press-fitted most into the inside of the main case main body 1040 and the state which pulled out the most outward is an intermediate-speed transmission position.

In this medium-speed transmission position, the locking projection 1071a of the shift key portion 1071 is engaged with the engagement concave portion 1049a of the shift gear 1049 present at an intermediate position among the plurality of shift gears 1049, , transmits the rotational power of the shift shaft 1048 to the shift gear 1049 in the intermediate position. In the transmission state in the intermediate speed transmission position, the drive speed of the transplant arm 1023 in the seedling transplantation apparatus 1002 with respect to a traveling speed becomes an intermediate speed, and a diurnal pitch also turns into intermediate length. At this time, the driving torque of the shift gear 1049 by the shift shaft 1048 also becomes an intermediate size.

The elastic pressing mechanism 1073 presses the steel ball 1073b pressed by the coil spring 1073a against the recessed portions 1071c formed at a plurality of locations in the lengthwise direction of the shift key portion 1071 . When the steel ball 1073b is pressed against the recessed portion 1071c of the shift key portion 1071, the locking projection 1071a protruding to the opposite side to the recessed portion 1071c is engaged with the shift gear 1049 to be engaged. ) is pressed against the engagement recessed portion 1049a on the inner peripheral side. By providing these coil springs 1073a, the steel ball 1073b, and the recessed part 1071c, the elastic pressing mechanism 1073 is comprised.

The shift key part 1071 uses the engagement point of the outer peripheral groove 1072a and the rear end side protrusion 1071b at the connection point between the shift key part 1071 and the slide operation part 1072 as the pivot point, and elastically presses it. In the direction of pressing by the mechanism 1073 , that is, in a direction intersecting with the direction of sliding by the slide operation unit 1072 , swinging operation is possible toward the engagement recessed portion 1049a on the inner periphery of the speed change gear 1049 . is well composed.

And the pressing position by the elastic pressing mechanism 1073 is provided in a position spaced apart from the said rocking|fluctuation point rather than the some gear pair in the 2nd speed change part 1007B. Therefore, the pressing action by the elastic pressing mechanism 1073 is stronger for the gear pair in which the diurnal pitch is set shorter by the action of the lever.

Among the shift gears 1049 in the second transmission unit 1007B, the rearmost high-speed gear and the middle-speed gear at the intermediate position are in a state of being sandwiched from both sides by the collar 1074 , respectively. Then, the low-speed gear on the frontmost side is provided in a state where it is fitted between the collar 1074 and a part of the shift shaft 1048 .

The distances a1001, a1002, and a1003 between the collars 1074 are, as shown in FIG. 17, the gear pair in which the diurnal pitch by the seedling transplantation apparatus 1002 is set to be shorter is present, the more the shift gear 1049 is. ) is set at wide intervals so that the amount of engagement of the shift key portion 1071 with respect to the shift key portion 1071 increases.

That is, the locking projection 1071a is formed in a tapered mountain shape as shown in FIGS. 16 and 17 . Therefore, when the distances a1001, a1002, and a1003 between the collars 1074 are wide, they are deeply engaged with the engagement concave portion 1049a of the speed change gear 1049, and the engagement margin increases, and conversely, if it is shallow, the speed change The engagement margin of the gear 1049 with respect to the engagement recessed part 1049a becomes small.

In the transmission gear 1049 in the second transmission unit 1007B, the front and rear widths of the teeth 1049b at the portion meshing with the driven transmission gear 1044b are set to be the same width, but each transmission gear 1049 The bulge 1049c is formed at a plurality of locations in the circumferential direction on the surface of the hub. The amount of protrusion of the bulging portion 1049c is different for each transmission gear 1049 .

That is, as shown in Fig. 17, the low-speed gear in the frontmost portion has a small bulge 1049c formed on the rear hub surface, and the medium-speed gear in the intermediate position has a large bulge in the rear hub surface. (1049c) is formed. In the rearmost high-speed gear, bulges 1049c and 1049c are formed to protrude from the front and rear both sides of the hub surface in both front and rear directions.

Accordingly, the width of the tooth portion 1049b of the transmission gear 1049 and the front-rear width including the bulging portion 1049c are set to coincide with the above-described spacings a1001, a1002, a1003 between the collars 1074. has been

As a result, the distances b1001 and b1002 between the teeth 1049b of the speed change gear 1049 are the teeth of the speed change gear 1049 existing at the location where the distances a1001, a1002, a1003 between the collars 1074 are widened. So that the spacing b1002 between the teeth 1049b of the shifting gear 1049 that exists at a location where the spacing a1001, a1002, a1003 between the collars 1074 is narrowed is smaller than the spacing b1001 between the 1049b. It is set.

The shift operation body 1070 is slid in the axial direction of the shift shaft 1048 by operation of the second shift lever 1075 .

15 and 16 , a second shift lever 1075 is connected to the slide operation unit 1072 of the shift operation body 1070 so as to be able to rotate relative to the rear end thereof. The lower end of the second shift lever 1075 is connected to the slide operation unit 1072 , and the middle portion in the vertical direction is supported by a lever support unit 1076 provided on the upper part of the main case body 1040 .

As a result, in the portion of the lever body of the second shift lever 1075 supported so as to be relatively rotatable by the lever support part 1076 , the center of the lever body part at the intermediate position along the vertical direction of the second shift lever 1075 . This becomes the actual swinging center, and the second shift lever 1075 is swinging around the swinging center line y1001 indicating the swinging center.

Therefore, by swinging the second shift lever 1075 around the swing center line y1001, the slide operation part 1072 of the shift operation body 1070 slides along the axial direction of the shift shaft 1048. has been

The above-described lever support portion 1076 supports the intermediate portion of the second shift lever 1075 in the vertical direction to be rotatably relatively rotatable. A pair of upper and lower concave pivot portions 1076a formed in a U-shape in plan view are provided so as to allow the inside. In this way, by allowing the intermediate portion in the vertical direction of the second shift lever 1075 to move within a predetermined range in the left-right direction, it coincides with the axial center of the intermediate portion in the vertical direction of the second shift lever 1075. The swinging center line y1001 also moves within a predetermined range in the left-right direction.

That is, the swinging center line y1001 is also supported in a state where it can be moved within a predetermined range in the left-right direction, so that the swinging of the second shift lever 1075 is not prevented from moving in the forward-rearward direction of the linearly moving slide operation unit 1072 . It is configured to be able to operate.

The weekly shift operation member 1100 in the weekly transmission mechanism 1007 is configured as shown in Figs. 15, 16 and 18 .

That is, at the lower end of the operating shaft 1101 penetrating the upper wall portion of the main case portion 1004, a locking pin 1102 sandwiched between the first tooth 1047a and the second tooth 1047b is fixed and , a plate-shaped operating body 1103 is installed at the upper end of the operating shaft 1101 located outside the upper wall portion.

By rotating the plate-shaped operating body 1103 around the axis of the operating shaft 1101 , the locking pin 1102 existing in the eccentric position shifts the shift gear 1047 in the axial direction of the work drive shaft 1041 . is configured to do so. The position around the axis of the plate-shaped operating body 1103 is determined by the ball detent mechanism 1104 .

As for the weekly shift operation member 1100 for operating the first transmission unit 1007A of the weekly transmission mechanism 1007, the description of the intermediate linkage mechanism is omitted, but the plate-shaped operating body 1103 is shown in FIG. It is associated with the first shift lever 1077 .

The upper end of the first shift lever 1077 is provided in a state where it is located in the T-shaped guide groove 1111 of the lever guide unit 1110 provided on the driving unit floor 1014 of the traveling body 1001. . The upper end of the first shift lever 1077 is located in the guide groove 1111 in the left and right lateral directions in the drawing, and is guided by the guide groove 1111 , in any one of the two positions of the first shift position and the second shift position. It is configured to be selectable and to change its location.

In addition, the upper end of the second shift lever 1075 for operating the second shift unit 1007B is also in the guide groove 1111 in the front-rear direction among the guide grooves 1111 of the lever guide unit 1110. It is positioned and is configured to be changeable so that any one of three positions of a low-speed shift position, a medium-speed shift position, and a high-speed shift position can be selected while being guided by the guide groove 1111 .

In the lever guide part 1110, the pattern display part 1112 in which the numerical value which shows a diurnal pitch is written is provided in the right and left both sides of the T-shaped guide groove 1111.

In the thing shown in this FIG. 22, the character pattern of "14" which supports 14 cm of diurnal pitches exists in the upper left in a figure. In order to set this weekly pitch of 14 cm, the first shift lever 1077 is positioned at the left end of the guide groove 1111, and the second shift lever 1075 is positioned on the right side of the frontmost character pattern of “14”. should be positioned In this state, since the first shift lever 1077 is operated from the first shift position to the high-speed side, and the second shift lever 1075 is also operated to the high-speed shift position, the implantation device side is driven at the highest speed state, Set the pitch to the tightest 14 cm.

From this state, when the first shift lever 1077 is operated toward the right end of the guide groove 1111 to the forward position of the character pattern "16", the first shift lever 1077 is switched to the second shift position and the state is switched to the low speed side. Accordingly, if the position of the second shift lever 1075 is not changed, the weekly pitch is set to 16 cm.

Further, from this state, when the position of the second shift lever 1075 is positioned on the left side of the character pattern "21", the weekly pitch is set to 21 cm, and when it is positioned on the left side of the character pattern "28", the weekly pitch is set to 28 cm.

If the same operation is performed while the first shift lever 1077 is positioned at the left end of the guide groove 1111, the position of the second shift lever 1075 is positioned on the right side of the character pattern “18”, and the weekly pitch is set to 18 cm, and when placed on the right side of the character pattern "24", the weekly pitch is set to 24 cm.

That is, the left and right movement of the first shift lever 1077 switches the shift gear 1047 to the first shift position and the second shift position, and the character pattern group on the left side and the character pattern on the right side of the guide groove 1111 . By selecting a group of , and moving the second shift lever 1075 in the front-rear direction, a target character pattern can be selected from each group of character patterns.

Therefore, it is easy to set the diurnal pitch by the operation positions of the first shift lever 1077 and the second shift lever 1075 in a state with few erroneous operations by the eye.

The guide groove 1111 of the lever guide unit 1110 is constituted by a through hole formed in the driving unit floor 1014 of the traveling body 1001 . 22 is an explanatory view seen from a plane showing the pattern display unit 1112 in the lever guide unit 1110 . The first shift lever 1077 and the second shift lever 1075 in the guide groove 1111 are installed in a state in which they do not protrude upward from the upper surface of the driving part floor 1014 , and are usually installed on the driving part floor 1014 . ) is covered by the top mat, so you can roll up the mat if necessary.

The power shifted by the interstate transmission mechanism 1007 is transmitted from the intermediate cylindrical body 1044 to the torque limiter 1046 .

The torque limiter 1046 includes a disk-shaped support plate 1046a fixed to the rear end of the intermediate cylindrical body 1044, a pressing plate 1046b that abuts toward the support plate 1046a, and a pressing plate 1046b on the support plate 1046a side. A coil spring 1046c that presses toward the coil spring 1046c is provided. Transmission power by the weekly transmission mechanism 1007 is transmitted to the implanted clutch 1008 via this torque limiter 1046 .

[Implanted Clutch]

The implanted clutch 1008 is configured as follows.

At the rear end of the rear cylindrical body 1045 of the working drive shaft 1041, a disk-shaped driving-side rotation member 1080 that engages with the splines on the outer periphery of the rear cylindrical body 1045 and rotates integrally with the rear cylindrical body 1045. is installed

On the outer peripheral side of the output transmission shaft body 1042 extended to the rear side rather than the rear cylindrical body 1045, it engages with the spline part 1042a formed in the outer peripheral surface of the output transmission shaft body 1042, and the output transmission shaft body 1042 ) and a driven-side rotation member 1081 capable of being rotated integrally and positionally movable in the axial direction of the output transmission shaft 1042 is provided.

This driven-side rotary member 1081 is urged toward the drive-side rotary member 1080 side by a biasing spring 1082 , and each of the drive-side rotary member 1080 and the driven-side rotary member 1081 is Engagement portions 1080a and 1081a capable of transmitting power in a state of engagement with each other are formed on the opposing surfaces.

The biasing spring 1082 includes a spring accommodating portion 1081b formed on a surface opposite to the side on which the engaging portion 1081a of the driven-side rotating member 1081 is formed, and a spring receiving portion 1081b formed on the inner surface side of the main case portion 1004 . It is installed between the fixtures. The inner end of the inner race 1040c of the ball bearing 1040b that supports the output transmission shaft 1042 is used as the fixed portion on the inner surface side of the main case portion 1004, but it must be in this position. there is no

And, the shape of the pressing spring 1082 is such that, in the axial direction of the work drive shaft 1041, the winding diameter at the end on the side abutting the spring accommodating portion 1081b is on the side that abuts against the inner end of the inner race 1040c. It is formed in the truncated cone shape set larger than the winding diameter.

The winding diameter of this biasing spring 1082 on the side contacting the inner end of the inner race 1040c is about the same as or slightly larger than the outer diameter of the externally fitted output transmission shaft 1042 . Therefore, the end position can be positioned using the inner edge part of the inner race 1040c of the ball bearing 1040b which supports the output transmission shaft body 1042, without requiring a positioning means in particular.

As shown in FIG. 16, the driven-side rotation member 1081 is spaced apart from the driving-side rotation member 1080 by resisting the pressing force of the pressing spring 1082 by the clutch operation member 1083 in contact with the outer periphery. It is operated to the side, and an engagement part 1081c to which the clutch operation member 1083 engages is provided on the outer peripheral part.

The clutch operation member 1083 has an operation pin 1084 penetrating the upper wall portion of the main case portion 1004 , and at the lower end of the operation pin 1084 , the engaging portion of the driven-side rotation member 1081 . An operation part 1084a which contact|abuts 1081c and moves the driven-side rotation member 1081 in the axial direction of the output transmission shaft body 1042 with rotation operation of the operation pin 1084 is formed.

The clutch operation member 1083 is an operation pin of a portion exposed to the outside of the main case part 1004 among the operation pins 1084 operated around the rotational axis p1001 in a direction crossing the axis of the work drive shaft 1041 ( An operation plate 1085 for rotating the operation pin 1084 is provided at the axial end of the 1084 . And the operation guide member 1086 which guides the rotation operation around the said rotation shaft center p1001 of the operation plate 1085 while supporting a part of the operation plate 1085 so that it may be inserted from up and down is a main case part (1004) is provided outside.

Thereby, the operation pin 1084 is restricted from positional movement in the direction along the rotation axis p1001 by the operation plate 1085, and the operation range around the rotation axis center p1001 is increased with the operation plate 1085. It is regulated by the abutment of the operation guide member 1086 .

The position of the spring receiving portion 1081b of the driven side rotation member 1081 with respect to the engagement portion with the engagement portion 1081c of the driven side rotation member 1081 at the lower end of the operation pin 1084 is , on the inner side in the radial direction of the driven-side rotation member 1081, and in the axial direction of the work drive shaft 1041, the engagement portion ( 1081a) is provided at a location near the opposite surface side where it is formed.

In this way, the spring accommodating portion 1081b is on the radially inner side of the engagement portion of the engagement portion 1081c of the operation pin 1084 and the driven-side rotation member 1081, and the engagement portion 1081a It has a shape that is greatly concave so that it is close to the side on which it exists. Thereby, it can be avoided that the axial length of the working drive shaft 1041 of the biasing spring 1082 is constrained by the position of the operating pin 1084 in the axial direction of the working drive shaft 1041, and the main case part (1004) can be made compact.

[fertilization drive system]

The fertilization apparatus drive system which branches and transmits a driving force with respect to the fertilization apparatus 1009 from the above-mentioned travel drive system is comprised as follows.

As shown in FIG. 21 , on the rear side of the main case unit 1003 , a branch case unit 1005 configured as a separate body from the main case unit 1003 is connected and fixed through an installation bolt or the like (not shown). have.

The main case part 1003 and the branch case part 1005 communicate with each other in the sealed state which joined the opening parts 1030a, 1050a formed in the mutual connection location, respectively.

As shown in FIG. 21 , the branch case part 1005 has an input side cylindrical part 1050A supporting the rear wheel output shaft 1064 extending rearward from the main case part 1003 and the rear wheel output shaft 1064 in a direction intersecting it. It is externally fitted to the branch transmission shaft 1051 extending to, and is provided with the output side cylindrical part 1050B which supports the branch transmission shaft 1051. The input-side cylindrical portion 1050A and the output-side cylindrical portion 1050B are constituted as an integral body having a common internal space.

The bevel gear 1052 for branch output that transmits power from the rear wheel output shaft 1064 to the branch transmission shaft 1051 is equipped in the input-side cylindrical portion 1050A, and a bevel gear for fertilization that meshes with the bevel gear 1052 for branch output ( 1053 (corresponding to the bevel gear for branch input) is equipped in the output side cylindrical part 1050B.

The bevel gear 1052 for branching output is provided in the input side cylindrical part 1050A on the side closer to the main case part 1003 than the branch transmission shaft 1051.

A rear wheel output shaft 1064 having a rear wheel input bevel gear 1064a meshed with the rear wheel output bevel gear 1035d at the front end, the front end is a ball provided in the case body 1030 of the main case unit 1003 It is supported by the bearing 1039 , and its rear end is supported by a ball bearing 1054 provided near the rear end of the branch case portion 1005 .

In this rear wheel output shaft 1064, a step portion 1064C (corresponding to a positioning portion) is formed at an intermediate position in the axial direction, and a front portion corresponding to an upper side in the transmission direction is larger than the step portion 1064C. It is the diameter shaft portion 1064A, and a rear side corresponding to a lower side in the rolling direction than the step portion 1064C is formed in the small diameter shaft portion 1064B.

The stepped portion 1064C is formed near the boundary between the main case portion 1003 and the branched case portion 1005, and a spline portion 1064D is formed at a portion close to the stepped portion 1064C among the small-diameter shaft portions 1064B. formed, and the bevel gear 1052 for branching output is spline-fitted to this spline portion 1064D.

The opening 1050a of the branch case part 1005 formed at a location opposite to the main case part 1003 has an inner diameter through which the branch output bevel gear 1052 supported by the rear wheel output shaft 1064 can be inserted.

Therefore, when the rear wheel output shaft 1064 is built into the branch case part 1005, it can be built into the branch case part 1005 in a state in which the bevel gear 1052 for branch output is supported on the rear wheel output shaft 1064 in advance. , the convenience of assembly and disassembly can be achieved.

The branch transmission shaft 1051 equipped at the input side end with a bevel gear 1053 for fertilization that meshes with the bevel gear 1052 for branch output supported by the rear wheel output shaft 1064 is in a posture orthogonal to the rear wheel output shaft 1064 is placed. Then, the input side end is inserted and drawn from the output side opening 1050b side formed in the output side cylindrical portion 1050B of the branch case portion 1005, and the output side end is inserted outward from the output side opening 1050b of the output side cylindrical portion 1050B. It is supported in a protruding state.

The interlocking shaft (not shown) to the fertilization apparatus 1009 is connected to the protrusion part of the branch transmission shaft 1051 which protruded outward from this output side opening 1050b.

In addition, the branch transmission shaft 1051 is a location corresponding to the insertion limit position into the output side cylindrical part 1050B, and the input side end abuts against the rear wheel output shaft 1064. As shown in FIG. That is, when the branch transmission shaft 1051 is inserted into the output side cylindrical portion 1050B from the output side opening 1050b until the insertion limit position is reached, the input side cylindrical portion ( Positioning the rear output shaft 1064 relative to 1050A.

The bevel gear 1053 for fertilization is supported rotatably relative to the branch transmission shaft 1051, and the branch transmission shaft 1051 and the bevel gear 1053 for fertilization are the fertilization clutch 1055 (corresponds to the work clutch). ) through which the coupling and separation are possible.

The fertilization clutch 1055 is provided with the normal shift member 1056 which spline-fitted the spline part formed in the outer peripheral surface of the branch transmission shaft 1051. As shown in FIG. And the hook part 1056a formed on the opposite surface of this normal shift member 1056 with respect to the bevel gear 1053 for fertilization, and the bevel gear 1053 side for fertilization opposed to the normal shift member 1056 is engaged. By engaging and disengaging the engagement recessed part 1053a, it is comprised so that the state which transmits rotation of the bevel gear 1053 for fertilization to the branch transmission shaft 1051, and the state which cut|disconnects transmission are possible.

The normal shift member 1056 is pressed against the bevel gear 1053 for fertilization by a coil spring 1057, and resists this pressing force to move the normal shift member 1056 away from the bevel gear 1053 for fertilization. A clutch operation shaft 1058 operated to the side is provided through the output-side cylindrical portion 1050B.

[Other Embodiment 10]

In the said embodiment, although the rice transplanter provided with the weekly case part 1004 as a planting operation case part was shown, it is not limited to this. For example, when it uses for the seeding machine provided with the direct sowing apparatus, a planting work case part turns into a work case part for changing the sowing interval by a direct sowing apparatus.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 11]

In the said embodiment, although the fertilization apparatus 1009 was used as a granular material supply apparatus, it is not limited to this.

For example, you may supply drugs, such as a herbicide and an insect repellent.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 12]

In the above-described embodiment, as the pattern display unit 1112 in the lever guide unit 1110 , the structure of the T-shaped guide groove 1111 arranged on the right and left was exemplified, but it is not limited to this structure.

For example, as shown in Fig. 23 (a), it is arranged on the front side and the lateral side of the L-shaped guide groove 1111, or, as shown in Fig. 23 (b), a cross-shaped guide groove ( 1111), it is possible to adopt an appropriate structure, such as arranging it in the front, rear, left and right sides.

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

[Other Embodiment 13]

In the above-described embodiment, the shift operation body 1070 of the weekly transmission mechanism 1007 is provided on the side of the shift shaft 1048 arranged as a shaft corresponding to the input-side transmission shaft, and an intermediate cylindrical body provided as the output-side transmission shaft. Although the structure in which power transmission was selectively performed with respect to the driven transmission gear 1044b fixed to 1044 was illustrated, it is not limited to this structure.

For example, a fixed transmission gear is provided on the side of the transmission shaft 1048 arranged as a shaft corresponding to the input side transmission shaft, and a relatively rotatable transmission gear is installed on the intermediate cylindrical body 1044 installed as an output side transmission shaft, , a relatively rotatable electric gear on the side of the intermediate cylindrical body 1044 may be selected from the shift operation body 1070 .

As for the other configuration, a configuration similar to the above-described embodiment may be adopted.

The present invention is not limited to a riding-type rice transplanter for transplanting 4 groups, but a small group of 3 groups or less, or a working machine employing a seedling transplantation device or direct sowing device of 5 or more groups, a faucet working machine, or electric power of various working machines such as a tiller or a tractor Applicable to the device.

1: traveling aircraft
2: Seedling transplantation device (working device)
3: main case part
3A: auxiliary transmission mechanism
4A: Work system transmission mechanism (wave system transmission mechanism)
4: Seeding case part (work case part)
5: Branch case part
5A: branch power mechanism
6: main transmission mechanism
8: work clutch
16: axle case
30a: opening
31: upper shift shaft
32: lower gearbox
32a, 32b: lower gear
32c, 32d: engagement recesses
32e: shaft support hole
34: shift member
34a, 34b: meshing teeth
40a: opening
41: variable speed operation shaft (work drive shaft)
42: output power shaft
43: front part normal shaft
47: shift gear
50a: opening
50A: input side cylindrical part
50B: output side cylindrical part
51: branch drive shaft
52: bevel gear for branch output
53: bevel gear for branch input
64: driving shaft
64C: positioning unit
65: transmission shaft
66: bevel gear pair
67: bevel gear pair
80: driving side rotating member
80a: engaging portion
81: driven side rotating member
81a: engaging portion
81b: spring receiving part
81c: engaging portion
82: compression spring
83: clutch operation member
84: operation pin
85: operation plate
86: operation guide member
p1: axis of rotation
1001: traveling aircraft
1002: seedling transplantation device (working device)
1004: expression work case part
1007: weekly shift mechanism (wave-type shift mechanism)
1041: shift control shaft
1044: intermediate cylindrical body (output side transmission shaft)
1044b: driven shifting gear (electric gear)
1047: shift gear
1048: shift shaft (input side transmission shaft)
1049: shift gear (electric gear)
1049b: Tooth
1070: shift control unit
1071: shift key part
1072: slide control panel
1073: elastic compression mechanism
1074: collar

Claims (7)

a main case unit equipped with a main transmission mechanism for shifting the input engine power and a secondary transmission mechanism for shifting the power transmitted from the main transmission mechanism to a plurality of stages and outputting it to a driving drive system;
A planting work case unit having a built-in planting system transmission mechanism for shifting and transmitting the power output from the main case part to a seedling transplantation device or a sowing device is provided,
The planting work case part is configured separately from the main case part, and is integrally connected and fixed with respect to the main case part,
The main case part and the planting work case part are in communication with each other in the sealed state in which the openings formed at each other's connection points are joined, and the respective internal spaces are in communication,
A branching case unit for branching and transmitting power output from the main case unit to the powder/granule supply device by embedding a branching transmission mechanism is provided,
The branch case part is configured separately from the main case part, and is integrally connected and fixed with respect to the main case part,
The main case part and the branch case part communicate with each other in the inner space in a sealed state in which the openings formed at the connection points are joined to each other,
The branch case part is externally fitted to the driving transmission shaft of the traveling drive system extending from the main case portion, and an input-side cylindrical portion for supporting the traveling transmission shaft;
It is externally fitted to a branch drive shaft extending in a direction intersecting the transmission transmission shaft for traveling and includes an output side cylindrical portion for supporting the branch drive shaft,
The input-side cylindrical portion is connected to the main case portion, and the output-side cylindrical portion is integrally formed with the input-side cylindrical portion,
A bevel gear for branch output is provided in the input-side cylindrical portion on a side closer to the main case portion than the branch drive shaft. The shift operation shaft according to claim 1, wherein the wave-type shift mechanism includes a shift operation shaft spanning the internal space of the shift operation case part and the internal space of the main case part, and slide operation along the axial direction of the shift operation shaft. and a shift gear supported on
The transmission device for a power receiving work machine, wherein a slide operation range accompanying the shift operation of the shift gear is set to span the inner space of the sifting work case part and the inner space of the main case part. According to claim 1, wherein a bevel gear for branch input meshing with the bevel gear for branch output is supported on the branch drive shaft,
The bevel gear for branch output is supported by the transmission shaft for traveling,
The transmission apparatus for a power receiving work machine, wherein the transmission shaft for traveling is provided with a positioning unit for regulating the positional movement of the bevel gear for branch output to a side opposite to the side on which the bevel gear for branch input exists. The power receiving working machine according to claim 3, wherein the opening of the branch case part formed at a location opposite to the main case part has an inner diameter through which the branch output bevel gear supported on the driving transmission shaft can be inserted. powertrain. 5. The method of claim 4, wherein the input-side end of the branch drive shaft is configured to be insertable and withdrawable with respect to the output-side opening formed in the branch case portion,
Transmission of a power receiving work machine in which the traveling transmission shaft is supported at a position corresponding to an insertion limit position of an input end of the branch drive shaft in the branch case portion and abuts against an input end of the branch drive shaft Device. The high-speed suitable for road running according to claim 1 or 5, wherein the auxiliary transmission mechanism spans an upper shift shaft positioned upward in the power transmission direction and a lower shift shaft positioned downward in the power transmission direction. A gear pair for a dragon and a gear pair for a low speed suitable for work travel are provided, and a shift member positioned between the pair of gears on the lower shift shaft is provided,
wherein the shift member is supported so as to be positionally movable in the axial direction of the lower shift shaft, and includes meshing teeth protruding in a direction of existence of a lower gear positioned lower in the power transmission direction among the respective gear pairs;
Engagement concave portions are formed in each of the lower gears positioned opposite to both sides of the shift member to engage with the engagement teeth of the shift member,
Among the meshing recesses, the meshing recessed portion of the lower gear in the high-speed gear pair suitable for on-road driving has a shape connected to the shaft support hole of the lower gear externally fitted to the lower shifting shaft. electric device. According to claim 1 or 2, comprising an axle case to which the power of the driving drive system is transmitted,
This axle case is provided with a pair of transmission upper bevel gears positioned on the upper side of the transmission shaft along the vertical direction, and a pair of transmission lower bevel gears located on the lower side of the transmission shaft, and each pair of bevel gears is reduced transmission The transmission device of a power receiving work machine, which is set to be, and the reduction ratio in the said transmission lower bevel gear pair is set larger than that of the said transmission upper side bevel gear pair.

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