KR20230064276A - Transmission for the agricultural vehicle - Google Patents

Abstract

The present invention relates to a transmission device for agricultural work vehicles. The present invention comprises: a first transmission shaft disposed inside a housing; a first direction change sun gear coupled to the first transmission shaft; a first direction change planetary gear engaged with the first direction change sun gear; a second direction change planetary gear that is not engaged with the first direction change planetary gear but is engaged with the first direction change planetary gear; a direction change carrier that becomes the rotation axis of the first direction change planetary gear and the second direction change planetary gear; a second direction change line gear engaged with a second direction change planetary gear; a second transmission shaft coupled with a second direction change sun gear; a first direction change clutch that selectively connects the first transmission shaft and the second transmission shaft; a second direction change clutch that selectively connects the direction change carrier and the housing; and an output unit connected to the second transmission shaft. A shaft that transmits power are a first transmission shaft and a second transmission shaft surrounding the first transmission shaft, substantially forming one shaft. The size of the transmission device can be drastically reduced, and thus it is possible to efficiently use an internal space of an agricultural work vehicle.

Description

Transmission for the agricultural vehicle {Transmission for the agricultural vehicle}

The present invention relates to a transmission system for an agricultural work vehicle, and more particularly, to a transmission system for an agricultural vehicle that selectively changes the direction of rotation of a power transmission shaft to move forward or backward.

Agricultural work vehicles are used to grow crops necessary for human life using land. For example, a combine, a tractor, a rice transplanter, and the like correspond to agricultural work vehicles. The combine performs the work of harvesting and threshing crops such as rice, barley, wheat, and beans. A tractor performs the work necessary to grow crops by using traction force. Rice transplanting is the process of transplanting seedlings grown in seedling beds or nursery boxes to paddy fields.

These agricultural working vehicles include a gearbox to adjust torque, speed, etc. as needed in the working process. In particular, the transmission device performs a forward shift for forward driving or a reverse shift for reverse driving, so that the agricultural work vehicle can perform various tasks.

2 is a schematic power transmission diagram for a transmission of an agricultural work vehicle according to the prior art.

Referring to FIG. 2 , the transmission device for an agricultural work vehicle according to the prior art includes an input shaft 110, a direction changing unit, and a transmission shaft 140. The direction change unit is a component that connects the input shaft 110 and the transmission shaft 140 and guides the transmission shaft 140 by changing the power of the input shaft 110 .

Forward driving has the following structure. The forward clutch 120 selectively connects the input shaft 110 and the first shift gear 121 . The first transmission gear 121 and the front gear 141 of the transmission shaft 140 are meshed with each other.

In the case of reverse driving, the structure is as follows. The reverse clutch 130 selectively connects the input shaft 110 and the second shift gear 131 . The second transmission gear 131 meshes with an idle gear 143, and the idle gear 143 meshes with the rear gear 142 of the transmission shaft 140.

Since the transmission shaft 140 rotates in different directions in forward travel and in reverse travel, the agricultural working vehicle can move forward or backward.

However, since the prior art includes two shafts of the input shaft 110 and the transmission shaft 140, the size of the transmission increases, so there is a problem that the internal space of the agricultural working vehicle cannot be efficiently utilized.

The problem to be solved by the present invention is to provide a transmission of an agricultural work vehicle capable of efficiently utilizing the internal space by having one shaft to reduce the size of the transmission in order to solve the problems of the prior art described above. is to do

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

A housing installed in an agricultural vehicle, a first transmission shaft disposed inside the housing and rotated by power transmitted from the engine of the agricultural work vehicle, a first turning line gear coupled to the first transmission shaft, and a radial direction of the first turning line gear A first direction shifting planetary gear disposed outside and meshed with the first direction shifting sun gear, disposed radially outside of the first direction shifting sun gear and meshed with the first direction shifting planetary gear without being engaged with the first direction shifting sun gear a second direction shifting planetary gear, a direction shifting carrier serving as a rotating shaft of the first and second direction shifting planetary gears, and a second direction shifting planetary gear disposed behind the first direction shifting planetary gear and meshed with the second direction shifting planetary gear. A direction changing line gear, a second transmission shaft disposed concentrically with the first transmission shaft and coupled to the second direction changing line gear, one side coupled to the first transmission shaft and the other side coupled to the second transmission shaft; A first direction shifting clutch selectively connecting the first transmission shaft and the second transmission shaft, one side coupled to the direction shifting carrier and the other side coupled to the housing, and the second direction shifting clutch selectively connecting the direction shifting carrier and the housing It includes an output unit connected to the clutch and the second transmission shaft.

The second direction shifting planetary gear is rotatably coupled to a front gear meshed with the first direction shifting planetary gear, a rear gear disposed behind the front gear and meshed with the second direction shifting sun gear, and a direction shifting carrier, and the front gear and It may include a connecting mechanism coupled to each of the rear gears.

The transmission device of the agricultural work vehicle is operated in a first direction driving mode for driving in one of forward and reverse driving and a second direction driving mode for driving in the opposite direction to the first direction driving mode, and the first direction driving In the mode, the first transmission shaft and the second transmission shaft are connected by the first direction change clutch, and in the second direction driving mode, the direction change carrier and the housing may be connected by the second direction change clutch.

The second transmission shaft may have a hollow structure surrounding at least a portion of the first transmission shaft.

The output unit is disposed parallel to the first output shaft coupled to the second transmission shaft, the first output gear coupled to the first output shaft, the second output gear meshed with the first output gear, and the first output shaft, and the second output gear A coupled second output shaft may be included. At this time, it includes an input shaft rotating by driving transmitted from the engine of the agricultural work vehicle, the first transmission shaft is made of a hollow structure surrounding at least a portion of the input shaft, and the second transmission shaft surrounds at least a portion of the first transmission shaft. It may include a hollow, and the first output shaft may include a hollow surrounding at least a portion of the input shaft.

A transmission device of an agricultural work vehicle includes an input shaft rotated by driving transmitted from an engine of the agricultural work vehicle and disposed concentrically with a first transmission shaft, a first transmission line gear coupled to the input shaft, and a radially outer side of the first transmission line gear. A speed change planetary gear disposed on and meshed with the first speed change line gear, a speed change carrier serving as a rotation axis of the speed change planetary gear, a second speed change line gear coupled to the first transmission shaft and meshed with the speed change planetary gear, one side of which is coupled to the speed change carrier A first shift clutch having the other side coupled to the input shaft and selectively connecting the input shaft and the shift carrier, and a second shift clutch having one side coupled to the shift carrier and the other side coupled to the housing and selectively connecting the housing and the shift carrier. A clutch may be included.

The speed change planetary gear is rotatably coupled to a front gear engaged with the first transmission line gear, a rear gear disposed behind the front gear and engaged with the second transmission line gear, and rotatably coupled to the speed change carrier and coupled to each of the front gear and the rear gear. It includes a coupling mechanism, and the front gear and the rear gear may be formed with different diameters.

The output unit is disposed parallel to the first output shaft coupled to the second transmission shaft, the first output gear coupled to the first output shaft, the second output gear meshed with the first output gear, and the first output shaft, and the second output gear A coupled second output shaft may be included.

The first transmission shaft includes a hollow surrounding at least a portion of the input shaft, the second transmission shaft includes a hollow surrounding at least a portion of the first transmission shaft, and the first output shaft includes a hollow surrounding at least a portion of the input shaft. can include

A transmission device of an agricultural work vehicle includes a housing installed in the agricultural work vehicle, a first transmission shaft disposed inside the housing and rotated by power transmitted from an engine of the agricultural work vehicle, and a direction change connected to an output end of the first transmission shaft. It includes a planetary gear assembly, a second transmission shaft disposed concentrically with the first transmission shaft and connected to an output end of the direction changing planetary gear assembly, and an output unit connected to the second transmission shaft to output power. The direction changing planetary gear assembly includes a first direction changing sun gear coupled to the first transmission shaft, and a first direction changing planetary gear disposed outside the first direction changing sun gear in a radial direction and engaged with the first direction changing sun gear. , a second direction changing planetary gear disposed radially outside of the first direction changing sun gear and engaged with the first direction changing planetary gear without being engaged with the first direction changing sun gear, the first direction changing planetary gear and the first direction changing planetary gear Includes a direction changing carrier serving as a rotating shaft of the second direction changing planetary gear, and a second direction changing sun gear coupled to the second transmission shaft, disposed behind the first direction changing sun gear, and meshed with the second direction changing planetary gear do.

Details of other embodiments are included in the detailed description and drawings.

According to the transmission device of the agricultural working vehicle of the present invention, one or more of the following effects are provided.

First, according to the present invention, since the shaft for transmitting power is a first transmission shaft and a second transmission shaft surrounding the first transmission shaft, substantially forming one shaft, the size of the transmission device can be drastically reduced, and thus an agricultural work vehicle. It has the advantage of being able to use the interior space efficiently.

Second, according to the present invention, since the driving mode is changed using a clutch without a sleeve that slides and changes the driving mode, a separate actuator for moving the sleeve is not required, and gear wear or wear during the movement of the sleeve Another advantage is that there is no risk of frictional heat.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic structural diagram of an agricultural working vehicle according to the present invention;
2 is a simplified power transmission diagram of a transmission of an agricultural work vehicle according to the prior art;
3 is a power transmission diagram in a first direction driving mode in a transmission of an agricultural work vehicle according to an embodiment of the present invention;
Figure 4 is a front view of the direction changing planetary gear assembly viewed from the front in Figure 3;
5 is a diagram of power transmission in a second direction driving mode in a transmission of an agricultural work vehicle according to an embodiment of the present invention;
6 is a front view of the direction changing planetary gear assembly as viewed from the front in FIG. 5;
7 to 9 are power transmission diagrams of a transmission of an agricultural working vehicle according to another embodiment of the present invention;
10 is a diagram of power transmission in a first shift operation mode in a transmission of an agricultural work vehicle according to an embodiment of the present invention;
11 is a front view of the transmission planetary gear assembly in FIG. 10 as viewed from the front;
12 is a diagram of power transmission in a second shift operation mode in a transmission of an agricultural work vehicle according to an embodiment of the present invention;
13 is a front view of the transmission planetary gear assembly in FIG. 12 as viewed from the front;
14 is a power transmission diagram of a transmission of an agricultural work vehicle according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to drawings for explaining the transmission 5 of an agricultural work vehicle according to embodiments of the present invention.

An agricultural work vehicle according to the present invention may be an agricultural work vehicle 1 such as a tractor, a combine, or a rice transplanter.

Referring to FIG. 1 , an agricultural work vehicle 1 includes wheels 2 and 3. The wheels 2 and 3 are components that move the agricultural work vehicle 1 .

The wheels 2 and 3 may be divided into a front wheel 2 and a rear wheel 3.

Referring to FIG. 1 , an agricultural work vehicle 1 includes an engine 4 . The engine 4 provides power to the agricultural work vehicle 1 .

The engine 4 is mechanically connected to the wheels 2 and 3, so that the agricultural work vehicle 1 can be driven when the engine 4 is driven.

The engine 4 is mechanically connected to the work machine 7, so that various tasks can be performed by operating the work machine 7.

Referring to FIG. 1 , an agricultural work vehicle 1 includes a transmission 5 . The shifting device 5 of the agricultural working vehicle shifts the power transmitted from the engine 4 and transmits it to the working machine 7 or the wheels 2 and 3.

Referring to FIG. 1 , an agricultural work vehicle 1 includes a work machine elevating unit 6 . The work machine elevating unit 6 is a component that lifts the work machine 7 by using the power of the engine 4 .

Working oil circulates in the work machine elevating unit 6 and can be operated by hydraulic pressure.

Referring to FIG. 1 , an agricultural working vehicle 1 includes a working machine 7 . The work machine 7 means a tool for agricultural work. The work machine 7 may be a rotary or a plow for clearing farmland. The work machine 7 may include any mechanism within a range that can be easily adopted by a person skilled in the art, in addition to the above-described mechanism.

Although not shown, the agricultural work vehicle 1 includes a power take-off device (PTO). The power take-off device is a component for transmitting power generated in the engine 4 to the working machine 7. By connecting a power input device (not shown) provided in the work machine 7 to a power take-off device, various tasks can be performed using power generated by the engine 4 .

Referring to FIGS. 3 to 6 , an embodiment of a transmission 5 of an agricultural work vehicle according to the present invention will be described in detail.

Referring to FIG. 3, the transmission device 5 of an agricultural work vehicle according to the present invention includes a housing 51, a first transmission shaft 54, a direction changing planetary gear assembly 56, a second transmission shaft 57, It includes a direction changing clutch unit 58 and an output unit 59. The direction changing planetary gear assembly 56 includes a first direction changing planet gear 561, a first direction changing planet gear 562, a second direction changing planet gear 563, a direction changing carrier 564, and a second direction changing line. gear 565. The direction change clutch unit 58 includes a first direction change clutch 581 and a second direction change clutch 582 .

The housing 51 forms the outer shape of the transmission 5 of the agricultural work vehicle and forms a space for receiving components therein.

The first transmission shaft 54 is a component that is disposed inside the housing 51 and rotates by power transmitted from the engine 4 . The first transmission shaft 54 is directly or indirectly connected to the engine 4 and receives power from the engine 4 .

The first transmission shaft 54 is coupled to the direction changing planetary gear assembly 56 and transmits power to the direction changing planetary gear assembly 56. More specifically, the first transmission shaft 54 is coupled to the first direction changing sun gear 561 of the direction changing planetary gear assembly 56 to transmit power. The first transmission shaft 54 is coupled to the direction changing clutch unit 58 . in more detail. The first transmission shaft 54 is coupled to the first direction change clutch 581 of the direction change clutch unit 58 .

The direction change planetary gear assembly 56 is a component that enables forward or reverse travel by changing the power transmission direction. The direction changing planetary gear assembly 56 is connected to the first transmission shaft 54 to receive power.

The direction changing planetary gear assembly 56 is selectively connected to the direction changing clutch unit 58 to selectively perform a reverse shift. More specifically, the direction change planetary gear assembly 56 is selectively connected to the second direction change clutch 582 of the direction change clutch unit 58 to selectively perform a reverse shift.

The first direction changing sun gear 561 is coupled to the first transmission shaft 54 and rotates integrally with the first transmission shaft 54 .

The first direction changing planetary gear 562 is rotatably coupled to the direction changing carrier 564 . The first direction changing planetary gear 562 is disposed outside the first direction changing sun gear 561 in the radial direction and meshes with the first direction changing sun gear 561 .

A plurality of first direction changing planetary gears 562 may be disposed along the circumferential direction of the first direction changing sun gear 561 . For example, referring to FIGS. 4 and 6 , three first direction changing planetary gears 562 may be disposed.

The second direction changing planetary gear 563 is disposed outside the first direction changing sun gear 561 in the radial direction and is engaged with the first direction changing planetary gear 562 . The second direction changing planetary gear 563 is not engaged with the first direction changing sun gear 561 . A plurality of second direction changing planetary gears 563 may be disposed along the circumferential direction of the first direction changing sun gear 561 . For example, referring to FIGS. 4 and 6 , three second direction changing planetary gears 563 may be disposed.

A plurality of first direction changing planet gears 562 and second direction changing planet gears 563 may be alternately disposed along the circumferential direction of the first direction changing sun gear 561 .

The second direction changing planetary gear 563 may be disposed in a counterclockwise direction of the first direction changing planetary gear 562 based on the circumferential direction of the first direction changing sun gear 561 when viewed from the front.

The second direction changing planetary gear 563 includes a front gear 5631, a rear gear 5632, and a connecting mechanism 5633.

The front gear 5631 is rotatably coupled to the direction changing carrier 564.

The front gear 5631 is disposed outside the first direction changing sun gear 561 in the radial direction and meshes with the first direction changing planetary gear 562 . The rear gear 5632 is rotatably coupled to the direction changing carrier 564, is disposed outside the second direction changing sun gear 565 in the radial direction, and is engaged with the second direction changing sun gear 565.

The front gear 5631 and the rear gear 5632 are connected by a connecting mechanism 5633. The connecting mechanism 5633 is rotatably coupled to the direction change carrier 564 and coupled to the front gear 5631 and the rear gear 5632, respectively.

The direction changing carrier 564 becomes a rotation shaft of the first direction changing planetary gear 562 and the second direction changing planetary gear 563 . In other words, the direction changing carrier 564 is disposed at the center of rotation of the first direction changing planetary gear 562 and is disposed at the center of rotation of the second direction changing planetary gear 563 . The direction changing carrier 564 passes through the centers of the first direction changing planetary gear 562 and the second direction changing planetary gear 563, respectively, and the first direction changing planetary gear 562 and the second direction changing planetary gear ( 563) becomes the center of each rotation. The direction changing carrier 564 may revolve around the first transmission shaft 54 together with the first direction changing planetary gear 562 and the second direction changing planetary gear 563 .

The second direction changing sun gear 565 is meshed with the second direction changing planetary gear 563. The second direction shifting gear 565 may be rotatably coupled to the first transmission shaft 54 . The second direction changing sun gear 565 may be spaced apart from the first direction changing sun gear 561 and disposed concentrically with the second direction changing sun gear 565 .

The second transmission shaft 57 is disposed concentrically with the first transmission shaft 54 and the second direction changing sun gear 565 is coupled thereto. The second transmission shaft 57 and the second direction changing sun gear 565 rotate integrally. The second transmission shaft 57 may have a structure of a hollow 571 surrounding at least a portion of the first transmission shaft 54 . The first transmission shaft 54 may be inserted into the hollow 571 of the second transmission shaft 57 . The first direction shifting clutch 581 may be coupled to the first transmission shaft 54 extending through the hollow 571 .

The direction change clutch unit 58 is selectively selected by one of power transmitted through the second transmission shaft 54 through the first transmission shaft 54 or power transmitted through the direction change planetary gear assembly 56 It is a component that rotates.

The first direction change clutch 581 has one side coupled to the first transmission shaft 54 and the other side coupled to the second transmission shaft 57, so that the first transmission shaft 54 and the second transmission shaft ( 57) is optionally connected. When the first direction changing clutch 581 is operated, the first transmission shaft 54 and the second transmission shaft 57 are coupled to rotate simultaneously.

The second direction change clutch 582 has one side coupled to the direction change carrier 564 and the other side coupled to the housing 51 to selectively connect the direction change carrier 564 and the housing 51 . When the second direction change clutch 582 operates, the direction change carrier 564 is fixed to the housing 51 and does not revolve around the first transmission shaft 54 .

The direction change clutch unit 58 uses the first direction change clutch 581 and the second direction change clutch 582 to shift gears so that the agricultural working vehicle can travel forward and backward in a first direction driving mode and a second direction change clutch 58. A directional driving mode can be implemented.

In the first direction driving mode, the first direction change clutch 581 connects the first transmission shaft 54 and the second transmission shaft 57. Therefore, the first transmission shaft 54 and the second transmission shaft 57 rotate integrally.

More specifically, in the first direction driving mode, the first direction change clutch 581 operates, and the second direction change clutch 582 does not operate. The first transmission shaft 54 and the second transmission shaft 57 are connected by the first direction changing clutch 581 so that the first transmission shaft 54 and the second transmission shaft 57 rotate integrally. At this time, the first direction changing sun gear 561 coupled to the first transmission shaft 54 and the second direction changing sun gear 565 coupled to the second transmission shaft 57 also rotate integrally. Accordingly, the first direction changing planetary gear 562 and the second direction changing planetary gear 563 engaged with the first direction changing sun gear 561 and the second direction changing sun gear 565, and the first direction changing planetary gear The direction changing carrier 564, which is the center of rotation of the 562 and the second direction changing planetary gear 563, may also rotate integrally with the first transmission shaft 54 and the second transmission shaft 57. In this case, the first direction changing planetary gear 562 and the second direction changing planetary gear 563 do not rotate around the direction changing carrier 564, but revolve around the first transmission shaft 54. Accordingly, the second transmission shaft 57 can be rotated in the same direction as the first transmission shaft 54 .

In the second direction driving mode, the second direction change clutch 582 connects the housing 51 and the direction change carrier 564 . Therefore, the direction shifting carrier 564 is fixed in the same position without rotating.

More specifically, in the second direction driving mode, the second direction change clutch 582 operates, and the first direction change clutch 581 does not operate. The first transmission shaft 54 and the second transmission shaft 57 are not connected and rotated separately. The direction shifting carrier 564 is fixed to the housing 51 by the second direction shifting clutch 582 and does not revolve around the first transmission shaft 54 . Therefore, the first direction changing planetary gear 562 and the second direction changing planetary gear 563 do not revolve around the first transmission shaft 54, but also rotate around the direction changing carrier 564. Accordingly, the power of the first transmission shaft 54 is supplied by the first direction changing sun gear 561, the first direction changing planetary gear 562, the second direction changing planetary gear 563, and the second direction changing sun gear 565. ), and the rotation direction is converted to the direction opposite to the rotation direction of the first transmission shaft 54. Thus, the second transmission shaft 57 can be rotated in the opposite direction to the first transmission shaft 54 .

The output unit 59 is a component that is connected to the second transmission shaft 57 and outputs power. The output unit 59 may output the power of the second transmission shaft 57 to the outside of the transmission or transmit it to another transmission within the transmission.

The output unit 59 may include a first output shaft 591 , a first output gear 592 , a second output gear 593 , and a second output shaft 594 .

The first output shaft 591 is coupled to the second transmission shaft 57 and rotates integrally. The first output gear 592 is coupled to the first output shaft 591 and rotates integrally. The second output gear 593 is meshed with the first output gear 592 . The second output shaft 594 is disposed parallel to the first output shaft 591 and is coupled to the second output gear 593 .

The operation of the transmission 5 of the agricultural work vehicle according to the present invention configured as described above in the first direction driving mode and the second direction driving mode will be described as follows.

3 and 4, in the first direction driving mode, the first direction changing planetary gear 562 and the second direction changing planetary gear 563 do not rotate around the direction changing carrier 564 and transmit the first direction. It revolves around the shaft 54, and the second transmission shaft 57 rotates in the same direction as the first transmission shaft 54.

In the first direction driving mode, the first direction change clutch 581 operates and the second direction change clutch 582 does not operate. The first transmission shaft 54 and the second transmission shaft 57 are connected and coupled by the first direction changing clutch 581 . Accordingly, the first transmission shaft 54, the first direction changing sun gear 561, the first direction changing planetary gear 562, the second direction changing planetary gear 563, the direction changing carrier 564, the second direction The shifting sun gear 565 and the second transmission shaft 57 all rotate integrally.

Referring to FIG. 4 , the front gears 5631 of the first direction changing planetary gear 562 and the second direction changing planetary gear 563 are integrated with the first direction changing sun gear 561 to form a first transmission shaft 54 , and the rear end gear 5632 of the second direction changing planetary gear 563 rotates integrally with the second direction changing sun gear 565 around the second transmission shaft 57.

More specifically, the first direction changing planetary gear 562 does not rotate around the direction changing carrier 564 but only revolves around the first transmission shaft 54, and the first direction changing sun gear 561 and rotates as a whole. The shear gear 5631 does not rotate around the direction changing carrier 564 but only revolves around the first transmission shaft 54, and the first direction changing line gear 561 and the first direction changing planetary gear 562 rotates integrally with The front gear 5631 and the rear gear 5632 are integrally connected through the connecting mechanism 5633, so that the front gear 5631 and the rear gear 5632 revolve without rotation. The rear gear 5632 does not rotate around the direction changing carrier 564, but only revolves around the second transmission shaft 57, and rotates integrally with the second direction changing sun gear 565. At this time, the first transmission shaft 54 and the second transmission shaft 57 are disposed concentrically. Therefore, since the first transmission shaft 54 and the second transmission shaft 57 rotate integrally, the first transmission shaft 54 and the second transmission shaft 57 rotate in the same direction.

5 and 6, in the second direction driving mode, the first direction changing planetary gear 562 and the second direction changing planetary gear 563 rotate around the direction changing carrier 564) and transmit the first direction. It does not revolve around the shaft 54, and the second transmission shaft 57 rotates in the opposite direction to the first transmission shaft 54.

In the second direction driving mode, the second direction change clutch 582 operates and the first direction change clutch 581 does not operate. The direction shifting carrier 564 is connected to and fixed to the housing 51 by the second direction shifting clutch 582 and does not rotate around the first transmission shaft 54 . Referring to FIG. 6 , the first direction changing planet gear 562 meshes with the first direction changing sun gear 561 to rotate, so that the first direction changing planet gear 562 rotates the first direction changing sun gear 561. rotates in the opposite direction. For example, when the first direction changing sun gear 561 rotates clockwise, the first direction changing planetary gear 562 rotates counterclockwise. The shear gear 5631 meshes with the first direction changing planetary gear 562 and rotates, so that the shear gear 5631 rotates in a direction opposite to that of the first direction changing planetary gear 562. For example, when the first direction changing planetary gear 562 rotates counterclockwise, the shear gear 5631 rotates clockwise. That is, the shear gear 5631 rotates in the same direction as the rotational direction of the first direction changing sun gear 561 . The front gear 5631 and the rear gear 5632 are integrally connected through the connecting mechanism 5633, so that the front gear 5631 and the rear gear 5632 rotate without revolution. That is, the rear gear 5632 rotates in the same direction as the rotational direction of the first direction changing sun gear 561, which corresponds to a clockwise direction in FIG. 6 . The second direction change line gear 565 meshes with the rear gear 5632 to rotate, so that the second direction change line gear 565 rotates in the opposite direction to that of the rear gear 5632, which is clockwise in FIG. corresponds to the direction. That is, the second direction changing sun gear 565 rotates in a direction opposite to that of the first direction changing sun gear 561 . Accordingly, the first transmission shaft 54 and the second transmission shaft 57 rotate in opposite directions.

3 and 5, the second direction change clutch 582 is shown to be disposed radially outside the first direction change clutch 581. Specifically, the first direction change clutch 581 and the second direction change clutch 582 are disposed on the same plane, and the second direction change clutch 582 is radially outside the first direction change clutch 581. are placed In this case, the front and rear length of the transmission 5 can be reduced compared to the transmission of FIG. 7 . However, it is not necessarily limited to this.

As shown in FIG. 7 , a second direction change clutch 582 may be disposed between the first direction change clutch 581 and the direction change planetary gear assembly 56 . In this case, compared to the transmission of FIGS. 3 and 5, the front and rear length of the transmission 5 may be increased, but the vertical height and the left and right width of the transmission 5 may be reduced. In particular, when the first direction change clutch 581 and the second direction change clutch 582 are used as the main clutch of the agricultural work vehicle 1, the first direction change clutch 581 and the second direction change clutch 582 The capacity must be increased and the size must be increased. As shown in FIG. 7 , when the second direction change clutch 582 is disposed between the first direction change clutch 581 and the direction change planetary gear assembly 56, the first direction change clutch 581 and the second direction change clutch 581 Even if the size of the two-way shifting clutch 582 increases, an increase in the overall volume of the transmission 5 can be suppressed.

In FIGS. 3 and 5 , the output unit 59 is illustrated to include a first output shaft 591 , a first output gear 592 , a second output gear 593 , and a second output shaft 594 . However, it is not necessarily limited to this. For example, the output unit 59 may be composed of only an output shaft. The output unit 59 may output power to the outside of the transmission 5 or may transmit power to another transmission within the transmission 5 .

In FIGS. 4 and 6 , three first direction changing planetary gears 562 and three second direction changing planetary gears 563 are respectively arranged. However, it is not necessarily limited to this, and each one, two, or four or more may be disposed within a range that can be easily adopted by a person skilled in the art.

Referring to FIG. 8, another embodiment of the transmission 5 of an agricultural work vehicle according to the present invention will be described.

In the transmission device 5 of the agricultural work vehicle according to the present embodiment, the first output shaft 591 may have a hollow structure 5911 surrounding at least a portion of the first transmission shaft 54 . The first transmission shaft 54 may be inserted into the hollow 5911 of the first output shaft 591 . The first transmission shaft 54 extending through the hollow 5911 of the first output shaft 591 can transmit power to the working machine 7 mounted on the agricultural work vehicle 1 through a power take-off device (not shown). there is.

In this embodiment, all matters except for the structure of the hollow 5911 of the first output shaft 591 and the arrangement relationship between the first transmission shaft 54 and the first output shaft 591 are the present invention of FIGS. 3 to 6 As it is almost identical to one embodiment of the transmission 5 of the agricultural work vehicle according to, detailed description will be omitted.

Referring to FIG. 9, another embodiment of the transmission 5 of an agricultural work vehicle according to the present invention will be described.

Referring to FIG. 9 , the transmission 5 of the agricultural work vehicle according to the present invention may include an input shaft 52 . The input shaft 52 is disposed inside the housing 51 and rotates by power received from the engine 4 .

In the transmission 5 of the agricultural work vehicle according to the present embodiment, the first transmission shaft 54 is formed in a structure of a hollow 541 surrounding at least a part of the input shaft 52, and the first output shaft 591 is It may be formed in a structure of a hollow 5911 surrounding at least a part of the input shaft 52 . The input shaft 52 may be inserted into the hollow 541 of the first transmission shaft 54 and the hollow 5911 of the first output shaft 591 . The input shaft 52 extending through the hollow 541 of the first transmission shaft 54 and the hollow 5911 of the first output shaft 591 is attached to the agricultural work vehicle 1 through a power take-off device (not shown). It is possible to transmit power to the working machine (7, shown in FIG. 1).

In this embodiment, the hollow 541 structure of the first transmission shaft 54, the hollow 5911 structure of the first output shaft 591, and the input shaft 52 and the first transmission shaft 54 and the first output shaft All matters except the arrangement relationship of 591 are almost identical to one embodiment of the transmission 5 of the agricultural work vehicle according to the present invention of FIGS. 3 to 6, so detailed descriptions will be omitted.

10 to 13 , the transmission device 5 of the agricultural work vehicle according to the present invention may include an input shaft 52, a transmission planetary gear assembly 53, and a transmission clutch unit 55. The transmission planetary gear assembly 53 may include a first transmission line gear 531 , a transmission planetary gear 532 , a transmission carrier 533 , and a second transmission line gear 534 . The shift clutch unit 55 may include a first shift clutch 551 and a second shift clutch 552 .

The input shaft 52 is disposed inside the housing 51 and can be rotated by power transmitted from the engine 4 . The input shaft 52 is directly or indirectly connected to the engine 4 and receives power from the engine 4 . The input shaft 52 is coupled to the transmission planetary gear assembly 53 and transmits power to the transmission planetary gear assembly 53. More specifically, the input shaft 52 is coupled to the first transmission line gear 531 of the transmission planetary gear assembly 53 to transmit power. The input shaft 52 is coupled to the shift clutch unit 55. in more detail. The input shaft 52 is coupled to the first shift clutch 551 of the shift clutch unit 55 .

The transmission planetary gear assembly 53 is a component that shifts the power transmitted from the input shaft 52. The transmission planetary gear assembly 53 is connected to the input shaft 52 to receive power. The transmission planetary gear assembly 53 is selectively connected to the transmission clutch unit 55 to selectively perform high-speed or low-speed transmission.

The first transmission line gear 531 is coupled to the input shaft 52 and rotates integrally with the input shaft 52 .

The speed change planetary gear 532 is rotatably coupled to the speed change carrier 533, disposed outside the first speed change line gear 531 in the radial direction, and meshed with the first speed change line gear 531. A plurality of the speed change planetary gears 532 may be disposed along the circumferential direction of the first speed change line gear 531 .

The speed change planetary gear 532 includes a front gear 5321, a rear gear 5322, and a coupling mechanism 5323.

The front gear 5321 is rotatably coupled to the shift carrier 533, is disposed outside the first shift line gear 531 in the radial direction, and is engaged with the first shift line gear 531. The rear gear 5322 is rotatably coupled to the shift carrier 533, is disposed outside the second shift line gear 534 in the radial direction, and is engaged with the second shift line gear 534. The front gear 5321 and the rear gear 5322 are connected by a coupling mechanism 5323. The coupling mechanism 5323 is rotatably coupled to the shift carrier 533 and coupled to the front gear 5321 and the rear gear 5322, respectively.

The front gear 5321 and the rear gear 5322 have different diameters.

The diameter of the front gear 5321 may be larger than that of the rear gear 5322. In this case, the diameter of the first transmission line gear 531 with which the front gear 5321 meshes may be smaller than the diameter of the second transmission line gear 534 with which the rear gear 5322 meshes. Accordingly, the gear ratio of the front gear 5321 with respect to the first transmission line gear 531 and the gear ratio of the second transmission line gear 534 with respect to the rear gear 5322 can be made relatively small, so that in the second shift operation mode The angular velocity w2 of the first transmission shaft 54 may be formed to have a relatively small size.

The diameter of the front gear 5321 may be smaller than that of the rear gear 5322. In this case, the diameter of the first transmission line gear 531 with which the front gear 5321 meshes may be larger than the diameter of the second transmission line gear 534 with which the rear gear 5322 meshes. Accordingly, the gear ratio of the front gear 5321 with respect to the first transmission line gear 531 and the gear ratio of the second transmission line gear 534 with respect to the rear gear 5322 can be relatively increased, so that the gear ratio in the second shift operation mode can be increased. The angular velocity w2 of the first transmission shaft 54 may be formed to have a relatively large size.

The speed change carrier 533 becomes a rotation shaft of the speed change planetary gear 532 . The speed change carrier 533 passes through the center of the speed change planetary gear 532 and becomes the center of rotation of the speed change planetary gear 532 . The speed change carrier 533 may revolve around the input shaft 52 together with the speed change planetary gear 532 .

The second transmission line gear 534 is coupled to the first transmission shaft 54 and meshes with the transmission planetary gear 532 .

The shifting clutch unit 55 is a component that selectively connects the shifting planetary gear assembly 53 with the housing 51 or the input shaft 52.

One side of the first shift clutch 551 is coupled to the shift carrier 533 of the shift planetary assembly 53 and the other side is coupled to the input shaft 52, so that the shift carrier 533 and the input shaft 52 are connected. Connect optionally.

The second shift clutch 552 has one side coupled to the shift carrier 533 and the other side coupled to the housing 51 to selectively connect the shift carrier 533 and the housing 51 .

The shift clutch unit 55 may implement a first shift operation mode and a second shift operation mode in which shifting is performed with power of different speeds using the first shift clutch 551 and the second shift clutch 552 .

10 and 11 , in the first shift operation mode, the first shift clutch 551 operates and the second shift clutch 552 does not operate. The input shaft 52 and the shift carrier 533 are connected by the first shift clutch 551 so that the input shaft 52 and the shift carrier 533 rotate at the same angular velocity w1. At this time, the first transmission line gear 531 coupled to the input shaft 52 also rotates at the same angular velocity w1. Accordingly, the speed change planetary gear 532 meshed with the first speed change line gear 531 and using the speed change carrier 533 as a rotating shaft revolves around the input shaft 52 at the same angular velocity w1. The speed change planetary gear 532 does not rotate around the speed change carrier 533. The second transmission line gear 534 engaged with the speed change planetary gear 532 also rotates at the same angular velocity w1, and the first transmission shaft 54 to which the second transmission line gear 534 is coupled also rotates at the same angular speed w1 will rotate with That is, the input shaft 52, the first transmission clutch 551, the transmission carrier 533, the first transmission line gear 531, the transmission planetary gear 532, the second transmission line gear 534, and the first transmission shaft ( 54) rotates integrally. Accordingly, the first transmission shaft 54 can transmit the same angular velocity w1 as the angular velocity w1 of the input shaft 52 .

Referring to FIGS. 12 and 13 , in the second shift operation mode, the second shift clutch 552 operates and the first shift clutch 551 does not operate. The housing 51 and the shift carrier 533 are connected by the second shift clutch 552 so that the shift carrier 533 is fixed together with the housing 51 without rotating. At this time, as the first transmission line gear 531 coupled to the input shaft 52 rotates, the transmission planetary gear 532 meshed with the first transmission line gear 531 rotates the fixed transmission carrier 533 as a rotation axis. do. The speed change planetary gear 532 does not revolve around the input shaft 52 . Here, the speed change planetary gear 532 rotates at an angular velocity w3 different from that of the first speed change line gear 531 according to the gear ratio of the front gear 5321 to the first speed change line gear 531 . The second transmission line gear 534 rotates at another angular speed w2 according to the gear ratio of the second transmission line gear 534 to the rear gear 5322, and the first transmission coupled with the second transmission line gear 534 The shaft 54 rotates at the same angular velocity w2 as that of the second transmission line gear 534. That is, the speed change planetary gear 532 rotates at an angular speed w3 different from that of the first speed change line gear 531 according to the gear ratio with the first speed change line gear 531, and the second speed change line gear 534 is a speed change planetary gear ( 532) rotates at another angular velocity w2 according to the gear ratio. Accordingly, the first transmission shaft 54 can transmit an angular velocity w2 different from the angular velocity w1 of the input shaft 52 .

The operation of the transmission 5 of the agricultural work vehicle according to the present invention configured as described above in the first shift operation mode and the second shift operation mode will be described as follows.

10 and 11, in the first shift operation mode, the shift planetary gear 532 does not rotate around the shift carrier 533 disposed at the center of the shift planetary gear 532, but rotates the input shaft 52. By revolving around the center, the first transmission shaft 54 rotates at the same angular velocity as the input shaft 52.

In the first shift operation mode, the first shift clutch 551 operates and the second shift clutch 552 does not operate. The input shaft 52 and the shift carrier 533 are connected and coupled by the first shift clutch 551 . Accordingly, the input shaft 52, the first transmission clutch 551, the first transmission line gear 531, the transmission planetary gear 532, the transmission carrier 533, the second transmission line gear 534, and the first transmission shaft (54) are all rotated integrally. Referring to FIG. 11 , the speed change planetary gear 532 integrally with the first sun gear 531 rotates around the input shaft 52, and integrally with the second sun gear 534 revolves around the first transmission shaft 54. will rotate to More specifically, the front gear 5321 of the speed change planetary gear 532 does not rotate around the speed change carrier 533 but only revolves around the input shaft 52, and is integrated with the first speed change line gear 531. will rotate The front gear 5321 and the rear gear 5322 are integrally coupled through the coupling mechanism 5323, so that the front gear 5321 and the rear gear 5322 revolve without rotation. The rear gear 5322 does not rotate around the speed change carrier 533 but only revolves around the first transmission shaft 54, and rotates integrally with the second speed change line gear 534. At this time, the input shaft 52 and the first transmission shaft 54 are disposed concentrically. Therefore, since the input shaft 52 and the first transmission shaft 54 rotate integrally, the angular velocity w1 of the first transmission shaft 54 becomes equal to the angular velocity w1 of the input shaft 52.

12 and 13, in the second shift operation mode, the shift planetary gear 532 rotates around the shift carrier 533 and does not revolve around the input shaft 52, so the first transmission shaft 54 ) rotates at an angular velocity different from that of the input shaft 52. More specifically, the angular velocity of the first transmission shaft 54 is a combination of the gear ratio between the front gear 5321 with respect to the first transmission line gear 531 and the gear ratio of the second transmission line gear 534 with respect to the rear gear 5322. is determined by

In the second shift operation mode, the second shift clutch 552 operates and the first shift clutch 551 does not operate. The shift carrier 533 is connected to and fixed to the housing 51 by the second shift clutch 552 and does not rotate around the input shaft 52 . Referring to FIG. 13 , the front gear 5321 meshes with the first transmission line gear 531 and rotates, and the angular speed is shifted according to the gear ratio between the front gear 5321 and the first transmission line gear 531 . That is, the front gear 5321 rotates at an angular velocity w3 different from the angular velocity w1 of the first transmission line gear 531 . The front gear 5321 and the rear gear 5322 are integrally coupled through the coupling mechanism 5323, so that the front gear 5321 and the rear gear 5322 rotate without revolution. The rear gear 5322 engages with the second transmission line gear 534 and rotates, and the angular speed is shifted according to the gear ratio of the second transmission line gear 534 to the rear gear 5322. That is, the second transmission line gear 534 rotates at an angular velocity w2 different from the angular velocity w3 of the rear gear 5322. Accordingly, the angular velocity w2 of the first transmission shaft 54 is different from the angular velocity w1 of the input shaft 52.

11 and 13, it is shown that two speed change planetary gears 532 are disposed. However, it is not necessarily limited to this, and within a range that can be easily adopted by a person skilled in the art, one or three or more may be disposed.

Referring to FIG. 14, another embodiment of the transmission 5 of the agricultural work vehicle according to the present invention will be described.

In the transmission 5 of the agricultural work vehicle according to the present embodiment, the first transmission shaft 54 is formed in a structure of a hollow 541 surrounding at least a part of the input shaft 52, and the first output shaft 591 is It may be formed in a structure of a hollow 5911 surrounding at least a part of the input shaft 52 . The input shaft 52 may be inserted into the hollow 541 of the first transmission shaft 54 and the hollow 5911 of the first output shaft 591 . The input shaft 52 extending through the hollow 541 of the first transmission shaft 54 and the hollow 5911 of the first output shaft 591 is attached to the agricultural work vehicle 1 through a power take-off device (not shown). It is possible to transmit power to the working machine (7, shown in FIG. 1).

In this embodiment, the hollow 541 structure of the first transmission shaft 54, the hollow 5911 structure of the first output shaft 591, and the input shaft 52 and the first transmission shaft 54 and the first output shaft All matters except the arrangement relationship of 591 are almost identical to one embodiment of the transmission 5 of the agricultural work vehicle according to the present invention of FIGS. 10 to 13, so detailed descriptions will be omitted.

According to the present invention, by selectively operating the first direction change clutch 581 or the second direction change clutch 582, the rotation direction of the second transmission shaft 57 can be changed. According to the present invention, there is no need for a sleeve and an actuator for operating the sleeve, and only an electric signal or a hydraulic signal for operating the first direction change clutch 581 or the second direction change clutch 582 is required, driving is highly reliable, and has the effect of preventing wear of gears or generation of frictional heat.

In addition, according to the present invention, the angular velocity of the first transmission shaft 54 can be changed by selectively operating the first shift clutch 551 or the second shift clutch 552 . According to the present invention, there is no need for a sleeve and an actuator for operating the sleeve, and only an electrical signal or a hydraulic signal for operating the first shift clutch 551 or the second shift clutch 552 is required, so the reliability of the drive is high, and it has the effect of preventing wear of gears or generation of frictional heat.

In addition, according to the present invention, since the second transmission shaft 57 is formed in a shape surrounding the first transmission shaft 54, it is possible to efficiently utilize the internal space of the agricultural work vehicle by substantially forming one shaft. It works.

In addition, according to the present invention, the first transmission shaft 54 is disposed concentrically with the input shaft 52 or is formed in a form in which the first transmission shaft 54 surrounds the input shaft 52, substantially forming one shaft. Forming, there is an effect that the internal space of the agricultural work vehicle can be efficiently utilized.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications and implementations are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

1: agricultural work vehicle 2: wheel
4: engine 5: gearbox
6: work machine lifting unit 7: work machine
51: housing 52: input shaft
53: transmission planetary gear assembly 54: first transmission shaft
56: direction change planetary gear assembly 561: first direction change line gear
562: first direction changing planetary gear
563: second direction change planetary gear 564: second direction change carrier
57: second transmission shaft 565: second direction conversion line gear
58: output shaft

Claims (11)

A housing installed in an agricultural work vehicle;
a first transmission shaft disposed inside the housing and rotated by power transmitted from an engine of the agricultural work vehicle;
a first direction changing gear coupled to the first transmission shaft;
a first direction changing planetary gear disposed outside the first direction changing sun gear in a radial direction and engaged with the first direction changing sun gear;
a second direction changing planetary gear disposed outside the first direction changing sun gear in a radial direction, not engaged with the first direction changing sun gear, but engaged with the first direction changing planetary gear;
a direction changing carrier serving as a rotation shaft of the first direction changing planetary gear and the second direction changing planetary gear;
a second direction changing sun gear disposed behind the first direction changing sun gear and engaged with the second direction changing planetary gear;
a second transmission shaft disposed concentrically with the first transmission shaft and coupled to the second direction changing sun gear;
a first direction shifting clutch having one side coupled to the first transmission shaft and the other side coupled to the second transmission shaft, and selectively connecting the first transmission shaft and the second transmission shaft;
a second direction change clutch having one side coupled to the direction change carrier and the other side coupled to the housing, and selectively connecting the direction change carrier and the housing; and
An agricultural work vehicle transmission device comprising: an output unit connected to the second transmission shaft. According to claim 1,
The second direction changing planetary gear,
a front gear engaged with the first direction changing planetary gear;
a rear gear disposed behind the front gear and engaged with the second direction shifting sun gear; and
A transmission device for an agricultural work vehicle comprising: a connecting mechanism rotatably coupled to the direction changing carrier and coupled to each of the front gear and the rear gear. According to claim 1,
The transmission device of the agricultural work vehicle is operated in a first direction driving mode for driving in one of forward and reverse driving and a second direction driving mode for driving in the opposite direction to the first direction driving mode,
In the first direction driving mode, the first transmission shaft and the second transmission shaft are connected by the first direction change clutch,
In the second direction driving mode, the shifting device of an agricultural work vehicle in which the direction changing carrier and the housing are connected by the second direction changing clutch. According to claim 1,
The second transmission shaft is a transmission device for an agricultural work vehicle made of a hollow structure surrounding at least a portion of the first transmission shaft. According to claim 1,
the output unit,
a first output shaft coupled to the second transmission shaft;
a first output gear coupled to the first output shaft;
a second output gear meshed with the first output gear; and
A shifting device for an agricultural work vehicle including a second output shaft disposed parallel to the first output shaft and coupled to the second output gear. According to claim 5,
Including; input shaft rotated by the drive transmitted from the engine of the agricultural work vehicle,
The first transmission shaft includes a hollow surrounding at least a portion of the input shaft,
The second transmission shaft includes a hollow surrounding at least a portion of the first transmission shaft,
Wherein the first output shaft includes a hollow surrounding at least a portion of the input shaft. According to claim 1,
an input shaft rotated by driving transmitted from an engine of the agricultural work vehicle and disposed concentrically with the first transmission shaft;
a first transmission line gear coupled to the input shaft;
a speed change planetary gear disposed outside the first speed change line gear in a radial direction and engaged with the first speed change line gear;
a shifting carrier serving as a rotating shaft of the shifting planetary gear;
a second transmission line gear coupled to the first transmission shaft, disposed behind the first transmission line gear, and meshed with the transmission planetary gear;
a first shift clutch having one side coupled to the shift carrier and the other side coupled to the input shaft, and selectively connecting the input shaft and the shift carrier; and
A shifting device for an agricultural work vehicle comprising: a second shift clutch having one side coupled to the shift carrier and the other side coupled to the housing, and selectively connecting the housing and the shift carrier. According to claim 7,
The speed change planetary gear,
a front gear engaged with the first transmission line gear;
a rear gear disposed behind the front gear and engaged with the second transmission line gear; and
A coupling mechanism rotatably coupled to the shift carrier and coupled to each of the front gear and the rear gear;
The front gear and the rear gear are gearshifts of agricultural work vehicles formed in different diameters. According to claim 7,
the output unit,
a first output shaft coupled to the second transmission shaft;
a first output gear coupled to the first output shaft;
a second output gear meshed with the first output gear; and
A shifting device for an agricultural work vehicle including a second output shaft disposed parallel to the first output shaft and coupled to the second output gear. According to claim 9,
The first transmission shaft includes a hollow surrounding at least a portion of the input shaft,
The second transmission shaft includes a hollow surrounding at least a portion of the first transmission shaft,
Wherein the first output shaft includes a hollow surrounding at least a portion of the input shaft. A housing installed in an agricultural work vehicle;
a first transmission shaft disposed inside the housing and rotated by power transmitted from an engine of the agricultural work vehicle;
a direction changing planetary gear assembly connected to the output end of the first transmission shaft;
a second transmission shaft disposed concentrically with the first transmission shaft and connected to an output terminal of the direction changing planetary gear assembly;
An output unit connected to the second transmission shaft to output power; includes,
The direction changing planetary gear assembly,
a first direction changing gear coupled to the first transmission shaft;
a first direction changing planetary gear disposed outside the first direction changing sun gear in a radial direction and engaged with the first direction changing sun gear;
a second direction changing planetary gear disposed outside the first direction changing sun gear in a radial direction, not engaged with the first direction changing sun gear, but engaged with the first direction changing planetary gear;
a direction changing carrier serving as a rotation shaft of the first direction changing planetary gear and the second direction changing planetary gear;
and a second direction changing sun gear coupled to the second transmission shaft, disposed behind the first direction changing sun gear, and meshed with the second direction changing planetary gear.

Images