KR20210131851A - Power take-off device for agriculture working apparatus - Google Patents

Abstract

The present invention relates to a power extractor for engine power extraction to a working apparatus in an agricultural working machine where at least one working apparatus can be mounted. The machine is equipped with an engine, a transmission, and a driving wheel. The present invention includes: a hollow housing; an input shaft disposed in the housing, supported so as to be freely rotatable, and rotated by power from the engine or the transmission; separate input gears arranged side by side on the input shaft; an output shaft parallel to the input shaft, having output gears meshing with the input gears, and transmitting power from the input shaft to a first working apparatus; a drive shaft coupled to the output shaft coaxially and so as to be freely rotatable; and a shift dog positioned between the input gears, rotating with the input shaft, and axially moving to be engaged with one of the input gears.

Description

POWER TAKE-OFF DEVICE FOR AGRICULTURE WORKING APPARATUS

The present invention relates to a power take-off device for an agricultural work machine, for example, to a device for extracting power from a power device such as an engine and a transmission to a work device such as a rice transplanter or a fertilization device in an agricultural work machine such as a rice transplanter.

Agricultural machines perform work such as rice transplanting or fertilization while driving in fields such as fields or paddy fields, so a device for extracting power necessary for performing work such as rice transplanting or fertilization from power devices such as an engine and a transmission is required.

Such a power take-off device is mainly coupled downstream of a system to which power is transmitted from an engine or a transmission to extract power from the engine and transmit it to the working machine.

Among agricultural work machines, the rice transplanter transmits power from the engine to the traveling wheel through the transmission, and draws power from the transmission and transmits it to the rice transplanter. In the rice transplanting machine, the power transmitted from the transmission to the traveling wheel and the rice transplanting machine is shifted according to the density of simulated transplantation to be transplanted in the rice transplanting operation.

However, the agricultural work machine is required to be used for various purposes, and a plurality of power take-off devices are required to be used for such various purposes. As one of such techniques, Japanese Patent Publication No. 4629891 (Document 1) discloses an invention named 'riding rice transplanter'.

In the invention of Document 1, a shaft for power take-off that crosses the work machine is disposed in the power transmission system from the main transmission to the traveling wheel, and the power transmission shaft connected to each work device is engaged with both ends of the shaft for power take-off.

However, in the invention of Document 1, since the shaft for power take-off is disposed across the working machine, there is a limitation in the space of the working machine, and there is a problem that a device for intermittent and shifting of power for each power transmission shaft must be separately provided.

In addition, in the invention of Document 1, there is a problem that two power transmission shafts must always be provided, and only one power transmission shaft is provided and the other power transmission shaft cannot be selectively arranged.

Document 1: Japanese Patent Publication No. 4629891

An object of the present invention is to provide a power take-off device having a configuration capable of selectively extracting power to a plurality of working devices as a relatively simple device in consideration of the problems of the prior art described above.

Specifically, an object of the present invention is to provide a device that is coupled to the downstream side of an engine or transmission and is capable of extracting power to two different working devices as a single power take-off device in which power from the engine or transmission is inputted to one input shaft.

In particular, it is an object of the present invention to provide a power take-off having a configuration that enables shifting while power drawn by the power take-off is transmitted to any one working device.

The above-described problem to be solved by the present invention is a power take-off according to the present invention, which is to withdraw power from the engine to the working device in an agricultural working machine that has an engine, a transmission and a travel wheel and can be equipped with one or more working devices achieved by the device.

The power take-off device includes: a hollow housing; an input shaft disposed inside the housing to be freely rotatably supported and rotated by receiving power from an engine or a transmission; a plurality of input gears spaced apart from each other and arranged side by side on the input shaft;

an output shaft positioned parallel to the input shaft and provided with a plurality of output gears meshing with the input gear to transmit the power received from the input shaft to the first working device; a drive shaft coaxially coupled to the output shaft to be freely rotatable; and a shift dog positioned between the plurality of input gears, which rotates together on the input shaft and moves in the axial direction to be coupled to any one of the plurality of input gears.

More preferably, the pair of the input gear and the output gear meshing with each other has a different gear ratio, and any one of the plurality of input gears engages the input shaft via the shift dog, so that the shift is performed between the input shaft and the output shaft. It can be configured to be done.

More preferably, it is disposed extending inward from the outside of the housing, the shift rod reciprocating in the longitudinal direction; and a coupling bar for coupling the shift rod to interlock with the shift dog with each other; may be configured to include.

More preferably, the intermittent dog selectively engages with the intermittent hub rotating together with the output shaft and rotates together with the drive shaft; further comprising, in a state in which the intermittent hub and the intermittent dog are engaged, the power received from the input shaft is transferred to the It may be configured such that the power transmitted from the input shaft is not transmitted to the second working device in a state in which it is transmitted to the second working device and the intermittent hub and the intermittent dog are not engaged.

More preferably, it may include an intermittent lever coupled to the intermittent dog to intermittently transmit power to the second working device.

More preferably, the agricultural working machine is configured as a rice transplanter, the first working device is a rice transplanting device, and the second working device is a fertilization device.

The power take-off device for an agricultural work machine according to the present invention according to the above configuration has the following effects.

That is, as one power take-off device coupled to the downstream side of the engine or transmission to input power from the engine or transmission to one input shaft, power can be extracted to two different working devices.

In addition, since the power drawn by the power take-off device can be shifted while being transmitted to one of the working devices, the rice transplantation device may be able to control the number of injections by the transmission in the compact section.

In addition, since the effects of the present invention described as described above are naturally exhibited by the configuration of the described contents regardless of whether the inventor recognizes them, the above-described effects are only a few effects according to the described contents, and all effects recognized or actual by the inventor should not be accepted as having been described.

In addition, the effect of the present invention should be further grasped by the overall description of the specification, and even if it is not described in an explicit sentence, a person of ordinary skill in the art to which the described content belongs through this specification has such an effect. If it is an effect that can be recognized as the effect, it should be viewed as the effect described in the present specification.

1 is a perspective view illustrating a partial configuration of a rice transplanter to which a power take-off device according to an embodiment of the present invention is mounted.
2 is a perspective view illustrating an appearance of a power take-off device according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a cross-section of FIG. 2 .
4 and 5 are diagrams illustrating an operating state using FIG. 3 .

Hereinafter, the configuration and operation of specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Here, in adding reference numerals to the components of each drawing, it should be noted that only the same components are marked with the same reference numerals as much as possible even though they are displayed on different drawings.

1 is a partial configuration of a rice transplanter equipped with a power take-off device of an embodiment of the present invention is shown.

Referring to FIG. 1 , a frame 1 of a rice transplanter to which an engine, a transmission, and a traveling wheel are mounted is provided, and a rice transplanter 2 may be mounted in front of the frame 1 . Power from the engine may be shifted in the transmission and transmitted to the axle 3 that transmits power to the driving wheel to drive the driving wheel. Therefore, the rice transplanter runs, and the power from the transmission is input to the input shaft 100 of this embodiment.

2 is a perspective view illustrating a power take-off device according to an embodiment of the present invention.

In the power take-off device (A),

Power from a transmission (not shown) is input to change the speed, and the hollow housing 10 in which elements transmitting power to the rice transplanter 2 are configured is provided. A shift arm device 4 may be provided at an upper end of the housing 10 to allow shift operation in the power take-off device A according to an operation of a shift lever (not shown).

The shifting dog 510 of the shifting unit 500, which will be described later, is operated by the shifting arm device 4 to perform shifting in the power take-off device A. The configuration and operation of the shifting arm device 4 are not known. Since the configuration of , the illustration and description of the specific configuration will be omitted.

3 is a cross-sectional view illustrating a cross-section of FIG. 2 .

Referring to FIG. 3 , the power take-off device A includes an input shaft 100 that is connected to the transmission and rotates when power is transmitted from the transmission. The output shafts 200 that are selectively engaged by the input shaft 100 and are rotationally driven while transmitting power to the first working device (not shown) are arranged in parallel with each other.

In addition, the drive shaft 300 for transmitting the power received from the input shaft 100 to the second working device (not shown) may be disposed on one side of the output shaft 200 . Here, the first working device may be an example of a rice transplanter, which is a rice transplanter (2) for transplanting seedlings grown in a nail bed or a seedling box to a paddy field, and the second working device may be a fertilizing device for spraying fertilizer, etc. on a paddy field. .

The input shaft 100 , the output shaft 200 , and the driving shaft 300 may be supported by a pair of bearings (not shown) supporting each and disposed inside the housing 10 .

First, on the input shaft 100,

A plurality of input gears 110 spaced apart from each other and arranged side by side, that is, the first and second input gears 111 and 112 may be freely rotatably coupled to the input shaft 100 . More specifically, a needle bearing 111b is interposed in the center of the first and second input gears 111 and 112 that are fitted in the axial direction of the input shaft 100, so that the input shaft 100 is autonomous regardless of the rotational operation. can be implemented rotatably. In addition, shift hubs 111a and 112a may be formed on one side of each of the first and second input gears 111 and 112 facing each other to assist rotation by meshing with a shifting dog 510 to be described later.

The shift unit 500 may be largely divided into a shift dog 510 , a coupling bar 520 , and a shift rod 530 .

The shift dog 510 is positioned between the first and second input gears 111 and 112 , and may be movably coupled in an axial direction while rotating together with the input shaft 100 . That is, according to the position of the shift dog 510 in the axial direction, the shift dog 510 and any one of the first input gear 111 and the second input gear 112 are engaged with each other to rotate the input shaft 100 to the first or The second input gears 111 and 112 are rotatable. Alternatively, when the shift dog 510 does not mesh with any one of the first input gear 111 and the second input gear 112 , the transmission of power to the output shaft 200 to be described later is interrupted to enter a neutral state. have.

The shift rod 530 is for implementing the aforementioned shift dog 510 to be operable from the outside.

That is, the shift rod 530 may be provided extending inwardly from the outside of the housing 10 and supported by two mounting holes (reference numerals not shown) of the housing 10 and reciprocating in the longitudinal direction thereof. . The shift rod 530 reciprocates by the shift arm device 4, and between the shift rod 530 and the shift dog 510, a coupling bar 520 for coupling the shift rod 530 and the shift dog 510 to interlock with each other is disposed. As the 530 reciprocates, the shift dog 510 may move between the first and second input gears 111 and 112 to selectively engage them. At this time, it is preferable that the shift dog 510 connected to one side of the coupling bar 520 is freely rotatably coupled from the coupling bar 520 . That is, the shift dog 510 may form a concave portion 510a along the center of the outer periphery, and the coupling bar 520 may be formed in a ring shape to be fitted into the concave portion 510a. Of course, the present invention is not limited thereto, and of course, it may be configured to help rotation, such as a bearing.

In the output shaft 200,

The two output gears 210 , that is, the first and second output gears 211 and 212 may be arranged side by side and rotatably coupled. The first and second output gears 211 and 212 are engaged with the first and second input gears 111 and 112 , respectively, to help transmit the rotational power of the input shaft 100 to the output shaft 200 . One end of the output shaft 200 that has received the power may protrude to the outside of the housing 10 and drive the first working device connected to the protruding output shaft 200 . In addition, a drive shaft 300 coaxially coupled to the output shaft 200 to be freely rotatable may be provided. At this time, the power received from the input shaft 100 by engagement with the intermittent hub 220 rotating together with the output shaft 200 may further include an intermittent dog 320 that transmits to the second working device. A description of the coupling relationship between the intermittent hub 220 and the driving shaft 300 will be described later.

Meanwhile, the gear ratios of the first input gear 111 and the first output gear 211 and the gear ratio sizes of the second input gear 112 and the second output gear 212 may be different from each other.

That is, the gear ratio of the second input gear 112 and the second output gear 212 is greater than the gear ratio of the pair of first input gear 111 and the first output gear 211, so that the first input gear 111 ) and the first output gear 211 , when power is transmitted from the input shaft 100 to the output shaft 200 , deceleration may be performed. Accordingly, the rice transplanting device 2 can be implemented as a dense section with a high density of simulated transplantation due to the reduced driving speed, and the output shaft 200 from the input shaft 100 through the second input gear 112 and the second output gear 212 . ), when the power is transmitted, the subordination is made so that the transplanting apparatus 2 can be implemented as a small section with a low density of simulated transplantation.

The drive shaft 300 is

As described above, a hollow portion 311 may be formed at one end of the output shaft 200 to be fitted with the other end. In this case, it is preferable that the output shaft 200 and the driving shaft 300 are simply fitted so as not to interfere with each other's rotational operation. The drive shaft 300 is movable in the axial direction of the drive shaft 300, selectively engaged with the intermittent hub 220 of the output shaft 200, and the intermittent dog 320 rotating together with the drive shaft may be coupled. . In a state in which the intermittent hub 220 and the intermittent dog 320 are engaged, the power received from the input shaft 100 is transmitted to the second working device, and in a state where the intermittent hub 220 and the intermittent dog 320 are not engaged, the input shaft ( 100) can be prevented from being transmitted to the second working device.

In other words, when the intermittent dog 320 is engaged with the intermittent hub 220, the power received from the input shaft 100 is transmitted to the drive shaft 300 via the intermittent hub 220 of the output shaft 200, and the driving shaft 300. It is possible to drive the second working device coupled to the second working device, when the second working device is not used, the power transmission to the driving shaft 300 is short-circuited by the operation of the intermittent lever 400a, and the driving shaft 300 rotates. may be in a state of not doing it. This intermittent dog 320 may be combined with the intermittent bar 400 inserted from the outside to enable operation from the outside. More specifically, the intermittent dog 320 has a protrusion insertion portion 321 is formed, and one end of the intermittent bar 400 is eccentrically protruding protrusion 410b so as to be movably coupled to the protrusion insertion portion 321 . ) may be provided. The intermittent bar 400 may be rotated by the rotation of the intermittent lever 400a exposed to the outside and coupled to the end.

Therefore, when the protrusion 410b is rotated by the rotation of the intermittent lever 400a, the intermittent dog 320 coupled with the protrusion 410b is moved in the axial direction to transmit power between the output shaft 200 and the drive shaft 300 . can be adjusted.

The operation of the power take-off of this embodiment described above will be described.

Power from the engine is input to the input shaft 100 of the power take-off device A of this embodiment via a transmission, and the input shaft 100 rotates. As the input shaft 100 rotates, the output shaft 200 rotates due to the meshing between the first input gear 111 and the second input gear 112 .

The user can select the neutral state and the operating state of the power take-off A by operating a shift lever (not shown) according to the required operation of the rice transplanting device 2, and the nesting state and the feeding state according to the density of transplanting the seedlings. can be selected.

The operation of the shift lever is transmitted to the shifting arm device 4 by a cable (not shown), and the position of the shifting dog 510 in the input shaft 100 in the axial direction is determined by the operation of the shifting arm device 4 . do.

In the position shown in FIG. 3 , the shift dog 510 does not mesh with any of the first and second input gears 111 and 112 , so that the power take-off device A causes the rotation of the input shaft 100 to occur in the output shaft 200 . It becomes a neutral state that is not transmitted to

As shown in FIG. 4 , when the shift dog 510 meshes with the second input gear 112 , the reduced power is transmitted from the input shaft 100 to the output shaft 200 , and the rice transplanter 2 is placed in the new section. and the water supply adjustment by the transmission is made for the news section.

When the shifting dog 510 is engaged with the first input gear 111, the speed is increased from the input shaft 100 to the output shaft 200, and power is transmitted, and the rice transplanter 2 adjusts the water supply by the transmission in the compact section.

As the intermittent hub 220 of the output shaft 200 and the intermittent dog 320 of the drive shaft 300 engage with each other, the drive shaft 300 is in a rotational state.

As shown in FIG. 5 , when the intermittent dog 320 is engaged with the second output gear 212 , the power from the output shaft 200 is transmitted to the drive shaft 300 via the intermittent dog 320 , and the housing 10 ), a second working device coupled with the end of the drive shaft 300 protruding to the outside, that is, another working device such as a fertilization device is driven.

When the fertilization device is not used, the power transmission to the output shaft 200 is short-circuited by the operation of the intermittent lever 400a, and the output shaft 200 is in a non-rotating state.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the described content. Therefore, the scope of the described content does not need to be limited to the described embodiments, and should be defined by the claims described below as well as the claims and equivalents.

1: Frame of rice transplanter 2: Rice transplanter
3: Axle 4: Shifting arm gear
A: first power take-off 10: housing
100: input shaft 110: input gear
111: first input gear 112: second input gear
111a, 112a: shift hub 111b: needle bearing
200: output shaft 210: output gear
211: first output gear 212: second output gear
220: intermittent hub 300: drive shaft
311: hollow part 320: intermittent dog
321: projection insert 400: intermittent bar
400a: control lever 410b: protrusion
500: shift unit 510: shift dog
510a: recess 520: bonding bar
530: shift rod

Claims (6)

hollow housing;
an input shaft disposed inside the housing to be freely rotatably supported and rotated by receiving power from an engine or a transmission;
a plurality of input gears spaced apart from each other and arranged side by side on the input shaft;
an output shaft positioned parallel to the input shaft and provided with a plurality of output gears meshing with the input gear to transmit the power received from the input shaft to the first working device;
a drive shaft coaxially coupled to the output shaft to be freely rotatable; and
and a shift dog positioned between the plurality of input gears, which rotates together on the input shaft and moves in the axial direction to be coupled to any one of the plurality of input gears.
According to claim 1,
A pair of input gears and output gears meshing with each other have different gear ratios, and any one of the plurality of input gears engages the input shaft via the shift dog, whereby a shift is made between the input shaft and the output shaft. The power take-off of the working machine.
3. The method of claim 2,
The power take-off device for a work machine comprising: a shift rod extending inwardly from the outside of the housing and reciprocating in its longitudinal direction; and a coupling bar coupling the shift dog to be interlocked with the shift dog.
According to claim 1,
Intermittent dog selectively engaged with the intermittent hub rotating together with the output shaft, and rotating with the drive shaft; further comprising,
In a state in which the intermittent hub and the intermittent dog are engaged, the power received from the input shaft is transmitted to the second working device,
A power take-off device for an agricultural work machine that prevents the power received from the input shaft from being transmitted to a second work device in a state where the intermittent hub and the intermittent dog are not engaged.
5. The method of claim 4
A power take-off device of an agricultural work machine comprising an intermittent lever coupled to the intermittent dog and intermittent power transmission to a second work device.
6. The method according to any one of claims 1 to 5,
The agricultural work machine is configured as a rice transplanter,
The first working device is a rice transplanting device, and the second working device is a fertilizing device.

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