JP2021006010A - Working vehicle - Google Patents

Abstract

To provide means which can continue the power transmission to one work device when a torque limiter is actuated in a working vehicle including the two work devices.SOLUTION: A working vehicle comprises: a first work device 3; a second work device 17; and a torque limiter C which has a driving side rotating body D and a driven side rotating body E and cuts the power transmission to the driven side rotating body E from the driving side rotating body D when the excessive load is applied thereto. The power is transmitted to the first work device 3 from the driven side rotating body E and the power is transmitted to the second work device 17 from the driving side rotating body D.SELECTED DRAWING: Figure 3

Description

The present invention relates to a work vehicle.

The corn harvester described in Patent Document 1 has a harvesting device located at the front part of a traveling vehicle body for harvesting corn tufts and a tufted device located at a rear portion of the harvesting device in the traveling vehicle body. It is equipped with a culm processing device that shreds culm after harvesting the body.

The corn harvester described in Patent Document 2 is a connection that connects a first power transmission device on the transport section side, a second power transmission device on the harvest section side, and a first power transmission device and a second power transmission device. It has a department. A spring-type torque limiter is provided at the connecting portion.

JP-A-2017-85917 JP-A-2018-68146

In a corn harvester, it is conceivable to install a culm treatment device at the bottom of the harvester. In that case, it is rational to transfer the driving force to the residue processing device by branching from the power transmission device provided in the harvesting device. Then, when a large load is generated on either one of the harvesting device and the residual culm processing device and the torque limiter is operated, both the harvesting device and the residual culm processing device are stopped. Such a problem can also occur in a work vehicle equipped with two work devices and a torque limiter.

An object of the present invention is to provide a means for a work vehicle provided with two work devices, which can continue power transmission to one work device when the torque limiter is activated.

[Structure 1]
The characteristic configuration of the work vehicle for achieving the above object is to include a first work device, a second work device, a drive side rotating body and a driven side rotating body, and the driving side when an excessive load is applied. A torque limiter that cuts off the power transmission from the rotating body to the driven side rotating body is provided, power is transmitted from the driven side rotating body to the first working device, and the driving side rotating body sends the power to the first working device. 2 The point is that power is transmitted to the working device.

According to the above characteristic configuration, the power is transmitted from the driven side rotating body to the first working device, and the power is transmitted from the driving side rotating body to the second working device. Therefore, the driven side rotating body is driven by an excessive load. Even if the power transmission to the side rotating body is cut off, the power transmission from the driving side rotating body to the second working device can be continuously performed. As a result, even if the first working device is stopped, the work in the second working device can be continued.

[Structure 2]
Another characteristic configuration of the work vehicle according to the present invention is that the drive side rotating body includes an input rotating body to which power from a drive source is input, an output rotating body to output power to the second working device, and the above. A drive-side contacting rotating body that comes into contact with the driven-side rotating body is provided, and the same rotation axis is provided in a state where the input rotating body, the output rotating body, and the driving-side contacting rotating body are adjacent and integrated. The point is that it is rotatably provided around it.

According to the above-mentioned feature configuration, the input rotating body, the output rotating body, and the driving side contact rotating body are integrated, so that the power input from the drive source is output to the second working device and driven. The transmission to the side rotating body can be surely performed.

[Structure 3]
Another characteristic configuration of the work vehicle according to the present invention is that the input rotating body, the output rotating body, and the driving side contact rotating body are provided adjacent to each other in this order and come into contact with the input rotating body. The point is that a pressing mechanism for pressing the driving side rotating body toward the driven side rotating body is provided.

According to the above-mentioned feature configuration, when an excessive load is applied, the driven side rotating body and the driving side rotating body rotate relative to each other against the pressing force from the pressing mechanism, and the driven side rotating body rotates to the driven side. The power transmission to the body can be reliably cut off.

[Structure 4]
Another characteristic configuration of the work vehicle according to the present invention is that the driven side rotating body is fixed so as not to rotate relative to the driven side rotating body and is provided with a first rotating shaft for transmitting power to the first working device. The drive-side rotating body is supported by the first rotating shaft in a state where it can rotate relative to the first rotating shaft and slide along the first rotating shaft.

According to the above-mentioned feature configuration, since the drive-side rotating body is supported by the first rotating shaft in a state where it can slide along the first rotating shaft, the driving-side rotating body slides when an excessive load is applied. Then, the relative rotation with the driven side rotating body becomes possible, and the power transmission to the driven side rotating body is cut off. That is, the power cut by the torque limiter is smoothly performed by the slide movement.

[Structure 5]
Another characteristic configuration of the work vehicle according to the present invention is that the output rotating body is a spur gear, and the second rotating shaft for transmitting power to the second working device and the second rotating shaft are provided so as not to rotate relative to each other. An output gear, which is a spur gear that meshes with the output rotating body, is provided, and the meshing width between the output rotating body and the output gear is larger than the sliding movement width of the driving side rotating body. Is a big point.

According to the above-mentioned feature configuration, the meshing width between the output rotating body and the output gear is larger than the sliding movement width of the driving side rotating body, so that the driving is performed while the output rotating body and the output gear are in mesh with each other. It is possible to disconnect the power transmission to the driven side rotating body by sliding the side rotating body.

[Structure 6]
Another characteristic configuration of the work vehicle according to the present invention is that the first working device is a harvesting section and the second working device is a post-harvesting processing section.

According to the above characteristic configuration, even when the torque limiter is activated and the power transmission to the harvesting section is cut off, the power transmission from the driving side rotating body to the post-harvest processing section can be continued, and the post-harvest processing can be continued. You can continue to work in the department.

[Structure 7]
Another characteristic configuration of the work vehicle according to the present invention is that the mechanism for transmitting power from the drive-side rotating body to the second working device includes an endless rotating body.

According to the above-mentioned feature configuration, when an excessive load is applied to the second working device, the endless rotating body is cut off, so that damage to the second working device can be suppressed. Therefore, both the first working device and the second working device can be protected.

[Structure 8]
Another characteristic configuration of the work vehicle according to the present invention includes a harvesting unit as the first working device provided in the front portion of the machine body, and a transporting unit connected to the center portion of the harvesting unit in the left-right direction of the machine body. A first transmission mechanism for transmitting power from the driven rotating body to the first working device is provided at one end of the harvesting section in the left-right direction of the machine, and the other in the left-right direction of the machine in the harvesting section. A second transmission mechanism for transmitting power from the drive-side rotating body to the second working device is provided at the side end portion, and the torque is provided between the other side end portion and the transport portion in the left-right direction of the machine body. The point is that the limiter is placed.

According to the above-mentioned feature configuration, since the first transmission mechanism and the second transmission mechanism are separately arranged at both ends in the left-right direction of the machine in the harvesting portion, the first transmission mechanism and the second transmission mechanism are simply configured. Can be. In addition, since the torque limiter is arranged between the side end portion on the side where the second transmission mechanism is arranged in the harvesting portion and the transport portion, it is possible to reliably transmit power from the torque limiter to the second transmission mechanism. it can.

It is a side view of the front part of a corn harvester. It is a top view of the front part of a corn harvester. It is a schematic plan view which shows the arrangement of the torque limiter, the transmission mechanism for harvesting, and the transmission mechanism for shredding. It is a top sectional view which shows the structure of a torque limiter. It is a right side view of the harvesting apparatus which shows the structure of the transmission mechanism for harvesting. It is a left side view of the harvesting apparatus which shows the structure of the transmission mechanism for shredding.

Hereinafter, embodiments of the corn harvester according to the present invention will be described with reference to the drawings. In this embodiment, the direction indicated by the reference numeral (F) in each figure is the front side of the machine body, and the direction indicated by the reference numeral (B) is the rear side of the machine body. The direction indicated by the symbol (L) is the left side of the aircraft, and the direction indicated by the symbol (R) is the right side of the aircraft.

〔overall structure〕
As shown in FIG. 1, the corn harvester includes a traveling machine 2 supported by a traveling device 1. In the present embodiment, the traveling device 1 includes a pair of left and right front wheels 1a and a pair of left and right rear wheels (not shown). A harvesting device 3 (an example of a first working device and a harvesting section) is supported on the front portion of the traveling machine body 2. The left and right traveling devices 1 (front wheel 1a and rear wheel) are located behind the harvesting device 3.

[Harvesting device]
The harvesting device 3 is pivotally connected to the machine frame 5 via a pair of left and right vertical plate-shaped connecting frame bodies 4 so as to be able to move up and down around the connecting axis X in the lateral direction of the machine. During the harvesting work, the harvesting device 3 is operated in a working posture having a height intermediate between the ascending limit posture and the descending limit posture.

The harvesting device 3 has a pair of left and right side wall portions 6 provided at both ends in the left-right direction (cutting width direction), a round tubular rear support 7 located at the rear and extending in the left-right direction, and left and right located at the center. It is provided with a square tubular middle support 8 or the like extending in the direction. The rear support 7 and the middle support 8 are connected to the left and right side wall portions 6.

As shown in FIG. 2, four rows of introduction paths A for introducing corn planted along with the traveling of the vehicle body are formed in a state of being arranged in parallel in the lateral direction. Locking transport devices 9 are provided on both the left and right sides of each introduction path A, and the lower side of the locking transport device 9 extends along the front-rear direction and rotates around the front-rear axis to form a corn stalk. A harvesting roller 10 that acts as a locking agent is provided.

The harvesting roller 10 is supported by the harvesting section frame 11. As shown in FIG. 2, the harvesting portion frame 11 is provided with a side view inverted U-shaped fixing portion 11A at the rear end portion, which is placed and fixed on the middle support 8 in a state of being overlapped from above. There is. Then, the roller covering portion 11B extends forward from the fixed portion 11A.

By pulling down the planted culms introduced into each introduction route A by the left and right harvesting rollers 10, the corn tufts are cut and harvested from the planted culms. The corn tufts are made up of rod-shaped seed grains that form tufts and are wrapped by bracts. After harvesting the corn tufts, the stalk culms are left rooted in the field. The harvested corn tufts are laterally collected by the lateral feed auger 12 and fed to the feeder 13 (an example of a transport unit). The corn tufts are fed to a peeling device (not shown), the bracts are stripped, and the bracts are stored in a storage tank (not shown) in the stripped state. The feeder 13 is connected to the center of the harvesting device 3 in the left-right direction of the machine body.

[Shredding device]
As shown in FIG. 1, the shredding device 14 (which is located below the harvesting device 3 and in front of the traveling device 1 (front wheel 1a) and shreds the stalks left on the ground). A second working device and an example of a post-harvest processing unit) are provided. The shredding device 14 extends long in the left-right direction. As shown in FIGS. 1, 3, 5, and 6, the shredding device 14 is connected to the side plates 15 located on both the left and right sides and the side plates 15 extending over the entire width in the left and right directions and connected to the left and right side plates 15. A square tubular lateral connecting body (not shown) and a rotation operating portion 17 erected over the left and right side plates 15 and rotatably supported around the horizontal axis are provided. As shown in FIGS. 3, 5, and 6, the rotation operating portion 17 is provided with a support shaft 18 that is rotationally driven and a plurality of rotary blades 19 that are supported by the outer peripheral portion of the support shaft 18. There is.

[Transmission structure]
As shown in FIGS. 2 and 3, the drive side rotating body D and the driven side rotating body E are provided, and when an excessive load is applied, the power is transmitted from the driving side rotating body D to the driven side rotating body E. A torque limiter C for cutting is provided. The power of the engine (not shown, an example of a drive source) mounted on the traveling machine body 2 is input to the drive side rotating body D of the torque limiter C by the power source chain K.

The harvesting transmission shaft 20 (an example of the first rotating shaft) and the harvesting transmission mechanism P (an example of the first rotating shaft) from the driven side rotating body E of the torque limiter C to the locking transport device 9, the harvesting roller 10, and the lateral feed auger 12 of the harvesting device 3. Power is transmitted via the first transmission mechanism). The harvest transmission shaft 20 is provided at the front portion of the feeder 13 in a posture extending in the left-right direction. The harvesting transmission mechanism P is provided at the right end of the harvesting device 3.

Power is transmitted from the driving side rotating body D of the torque limiter C to the rotating operating portion 17 of the shredding device 14 via the shredding transmission mechanism Q (an example of the second transmission mechanism). The shredding transmission mechanism Q is provided between the left end portion of the front portion of the feeder 13 and the left end portion of the harvesting device 3, and the left end portion of the harvesting device 3. The torque limiter C is arranged between the left end portion of the harvesting device 3 and the front portion of the feeder 13.

[Torque limiter]
As shown in FIG. 4, the drive side rotating body D of the torque limiter C includes an input rotating body 21 for inputting power from the engine, an output rotating body 22 for outputting power to the shredding device 14, and a driven side. A drive-side contact rotating body 23 that comes into contact with the rotating body E is provided. The input rotating body 21, the output rotating body 22, and the driving side contact rotating body 23 are provided adjacent to each other in this order from the right.

The input rotating body 21 is a sprocket, and a power source chain K for transmitting power from the engine is hung around. The output rotating body 22 is a spur gear and meshes with the output gear 41 (described later) of the shredding transmission mechanism Q. The drive-side contact rotating body 23 is a disk having a gear shape that meshes with the driven-side rotating body E on the contact surface with the driven-side rotating body E. The input rotating body 21, the output rotating body 22, and the driving side contact rotating body 23 are fixed to each other with bolts or the like so that they cannot rotate relative to each other in a state where the central axes are aligned. The input rotating body 21, the output rotating body 22, and the driving side contact rotating body 23 are in a state in which these three are integrally rotatable relative to the harvest transmission shaft 20 and slidable along the harvest transmission shaft 20. , Supported by the harvest transmission shaft 20. In other words, the input rotating body 21, the output rotating body 22, and the driving side contact rotating body 23 rotate around the same rotation axis (rotation axis of the harvest transmission shaft 20) in a state of being adjacent and integrated. It is provided as possible.

The driven-side rotating body E of the torque limiter C has a gear shape that meshes with the driving-side contacting rotating body 23 on the surface (contact surface with the driving-side contacting rotating body 23) of the driving-side rotating body D. It is a disk. The driven side rotating body E is fixed so as not to rotate relative to the harvest transmission shaft 20.

The torque limiter C is provided with a pressing mechanism G that comes into contact with the input rotating body 21 of the driving side rotating body D and presses the driving side rotating body D toward the driven side rotating body E. The pressing mechanism G is arranged between the disc-shaped pressing plate 24 supported by the harvest transmission shaft 20 and the pressing plate 24 and the input rotating body 21, and directs the input rotating body 21 toward the driven side rotating body E. A spring 25 for pressing is provided.

The driving side rotating body D is pressed toward the driven side rotating body E by the pressing mechanism G, and the gear shape of the driving side contact rotating body 23 of the driving side rotating body D and the gear shape of the driven side rotating body E mesh with each other. As a result, the driving side rotating body D and the driven side rotating body E rotate in an integrated manner, and power is transmitted from the driving side rotating body D to the driven side rotating body E. When an excessive load is applied to the torque limiter C due to the locking transfer device 9 of the harvesting device 3, the harvesting roller 10, the lateral feed auger 12, the biting of a stone or the like into the harvesting transmission mechanism P, etc., the pressing force of the spring 25 The driving side rotating body D and the driven side rotating body E are separated from each other against the above, and the power transmission from the driving side rotating body D to the driven side rotating body E is cut off. At this time, the drive-side rotating body D slides along the harvest transmission shaft 20 by the height of the gear shape of the driving-side contact rotating body 23 and the driven-side rotating body E. That is, as shown in FIG. 4, the width T1 of the slide movement of the driving side rotating body D is equal to the height of the gear shape of the driving side contact rotating body 23 and the driven side rotating body E.

[Transfer mechanism for harvesting]
As shown in FIGS. 3 and 5, the harvesting transmission mechanism P includes a drive sprocket 31, a driven sprocket 32, a driven sprocket 33, and an endless rotating chain 34. The drive sprocket 31 is attached to the right end of the harvest transmission shaft 20. The driven sprocket 32 is attached to the right end of the rotating shaft 12a of the lateral feed auger 12. The driven sprocket 33 is attached to the right end of the power transmission shaft 9a to the locking transfer device 9 and the harvesting roller 10. The endless rotating chain 34 is wound around the drive sprocket 31, the driven sprocket 32, and the driven sprocket 33. The harvest transmission mechanism P causes the rotation shaft 12a and the power transmission shaft 9a to rotate in the same direction as the harvest transmission shaft 20.

[Transmission mechanism for shredding]
As shown in FIGS. 3 and 6, the shredding transmission mechanism Q includes a shredding transmission shaft 40 (an example of a second rotating shaft), an output gear 41, a drive sprocket 42, a driven sprocket 43, and endless. A rotating chain 44 (an example of an endless rotating body) is provided. The shredded transmission shaft 40 is arranged between the left end portion of the front portion of the feeder 13 and the left side wall portion 6 of the harvesting device 3 in a posture parallel to the harvest transmission shaft 20.

The output gear 41 is attached to the left end of the shredded transmission shaft 40 so as not to rotate relative to each other. As shown in FIG. 4, the output gear 41 meshes with the output rotating body 22 of the driving side rotating body D of the torque limiter C, and receives the driving force from the output rotating body 22. The meshing width T2 between the output rotating body 22 and the output gear 41 is equal to the thickness of the output rotating body 22 and the output gear 41, and is larger than the sliding movement width T1 of the driving side rotating body D. As a result, the power transmission from the driving side rotating body D to the driven side rotating body E can be disconnected and returned to the transmission state without disengaging the engagement between the input rotating body 21 and the endless rotating chain 44.

The drive sprocket 42 is attached to the left end of the shredded transmission shaft 40. The driven sprocket 43 is attached to the left end of the support shaft 18 of the rotary actuating portion 17. The endless rotating chain 44 is wound around the driving sprocket 42 and the driven sprocket 43. The shredding transmission mechanism Q causes the support shaft 18 to rotate in the same direction as the shredding transmission shaft 40. Here, power is transmitted from the drive side rotating body D to the shredding transmission mechanism Q by engaging the output rotating body 22 of the driving side rotating body D of the torque limiter C and the output gear 41 of the shredding transmission mechanism Q. Therefore, the shredded transmission shaft 40 rotates in the direction opposite to that of the harvest transmission shaft 20. Therefore, the support shaft 18 of the rotation operating portion 17 rotates in the direction opposite to the rotation shaft 12a and the power transmission shaft 9a of the harvesting device 3. In the present embodiment, the rotation operating portion 17 is rotated in the reverse direction by transmitting power from the output rotating body 22 of the driving side rotating body D to the output gear 41 of the shredding transmission mechanism Q, so that the endless rotating body Compared with the method in which the sprocket is brought into contact with the outer peripheral side to obtain reverse rotation, the drive transmission can be reliably performed.

[Other Embodiments]
[1] In the above embodiment, an example has been described in which power is transmitted from the driven side rotating body E of the torque limiter C to the harvesting device 3, and power is transmitted from the driving side rotating body D to the shredding device 14. The present invention is applicable not only to the torque limiter C, the harvesting device 3, and the shredding device 14, but also to other working devices and torque limiters of the corn harvester. Further, the present invention is applicable not only to a corn harvester but also to a work machine provided with a plurality of work devices and a torque limiter.

[2] In the above embodiment, an example in which the harvesting transmission mechanism P is provided at the right end of the harvesting device 3 and the shredding transmission mechanism Q is provided at the left end of the harvesting device 3 has been described. The transmission mechanism P and the shredding transmission mechanism Q may be arranged in reverse, or may be provided at the same end.

[3] In the above embodiment, an example in which the torque limiter C is a so-called spring type torque limiter has been described, but the type of the torque limiter C is not limited to this. Further, instead of the drive-side contact rotating body 23 and the driven-side rotating body E in which the gear shape is formed, another configuration such as a friction plate may be used.

[4] In the above embodiment, an example in which the input rotating body 21, the output rotating body 22, and the driving side contact rotating body 23 are arranged in this order in the driving side rotating body D of the torque limiter C has been described. , The position and order of arrangement are not limited to the description examples.

[5] In the above embodiment, the power transmission from the drive side rotating body D of the torque limiter C to the shredding transmission mechanism Q is the output of the output rotating body 22 of the driving side rotating body D and the shredding transmission mechanism Q. Although it was realized by the gear 41, the power transmission method is not limited to the gear type, and other types may be used.

The present invention is applicable to a corn harvester as well as a working machine provided with a plurality of working devices and a torque limiter.

3: Harvesting device (1st working device, harvesting section)
13: Feeder (conveyor)
14: Shredding device (second working device, post-harvest processing unit)
20: Harvest transmission axis (first rotation axis)
21: Input rotating body 22: Output rotating body 23: Drive side contact rotating body 40: Shredded transmission shaft (second rotating shaft)
41: Output gear 44: Endless rotating chain (endless rotating body)
C: Torque limiter D: Driving side rotating body E: Driven side rotating body G: Pressing mechanism P: Harvesting transmission mechanism (first transmission mechanism)
Q: Transmission mechanism for shredding (second transmission mechanism)
T1: Width (width of slide movement)
T2: Engagement width

Claims (8)

The first working device and
The second working device and
A torque limiter that includes a driving side rotating body and a driven side rotating body and cuts off power transmission from the driving side rotating body to the driven side rotating body when an excessive load is applied is provided.
Power is transmitted from the driven side rotating body to the first working device, and the power is transmitted.
A work vehicle in which power is transmitted from the drive-side rotating body to the second work device. The drive side rotating body is
An input rotating body to which power from the drive source is input, and
An output rotating body that outputs power to the second working device,
A driving side contacting rotating body that comes into contact with the driven side rotating body is provided.
The work vehicle according to claim 1, wherein the input rotating body, the output rotating body, and the driving side contact rotating body are rotatably provided around the same rotation axis in a state of being integrated adjacent to each other. The input rotating body, the output rotating body, and the driving side contact rotating body are provided adjacent to each other in this order.
The work vehicle according to claim 2, further comprising a pressing mechanism that comes into contact with the input rotating body and presses the driving side rotating body toward the driven side rotating body. A first rotating shaft that is fixed to the driven side rotating body so as not to rotate relative to the driven side rotating body and transmits power to the first working device is provided.
The work according to claim 3, wherein the drive-side rotating body is supported by the first rotating shaft in a state where the driving side rotating body can rotate relative to the first rotating shaft and slide along the first rotating shaft. car. The output rotating body is a spur gear and
A second rotating shaft for transmitting power to the second working device and an output gear which is a spur gear that is provided on the second rotating shaft so as to be relatively non-rotatable and meshes with the output rotating body are provided.
The work vehicle according to claim 4, wherein the meshing width between the output rotating body and the output gear is larger than the sliding movement width of the driving side rotating body. The work vehicle according to any one of claims 1 to 5, wherein the first work device is a harvesting unit, and the second work device is a post-harvest processing unit. The work vehicle according to claim 6, wherein the mechanism for transmitting power from the drive-side rotating body to the second working device includes an endless rotating body. A harvesting unit as the first working device provided in the front part of the machine body and a transporting part connected to the center part in the left-right direction of the machine body of the harvesting part are provided.
A first transmission mechanism for transmitting power from the driven side rotating body to the first working device is provided at one end of the harvesting portion in the left-right direction of the machine.
A second transmission mechanism for transmitting power from the drive-side rotating body to the second working device is provided at the other end of the harvesting section in the left-right direction of the machine.
The work vehicle according to any one of claims 1 to 6, wherein the torque limiter is arranged between the other side end portion and the transport portion in the left-right direction of the machine body.

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