CN111345154B

CN111345154B - Combine harvester

Info

Publication number: CN111345154B
Application number: CN201911323638.8A
Authority: CN
Inventors: 梅林竜司; 铃木祥宏; 增本凉太
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2018-12-21
Filing date: 2019-12-20
Publication date: 2023-08-08
Anticipated expiration: 2039-12-20
Also published as: CN111345154A; KR20200078327A

Abstract

The invention provides a combine harvester. A combine harvester is provided with a side cover part covering a power transmission device arranged at the lateral outer side of a threshing device from the lateral outer side of the machine body, and a lower cover part (60) covering a gap between the lower end part of the side cover part (50) and the lower end part (8 f) of the threshing device (8), wherein a part (63) of the lower cover part, which is positioned above the rear end side part of a crawler traveling device (2), is provided with a plurality of inclined components (68), and the plurality of inclined components are arranged in a state of being inclined at the side view of the machine body and in a state of being separated by a space (S) in the front-rear direction of the machine body, so that dust is allowed to fall downwards from the gap between the side cover part and the threshing device, and mud splashed by the crawler traveling device is blocked. Thus, dust entering the gap between the threshing device and the side cover falls from the gap, and mud splashed by the crawler travel device is less likely to enter the gap between the threshing device and the side cover.

Description

Combine harvester

Technical Field

The present invention relates to a combine harvester, comprising: a crawler travel device for supporting the frame of the machine body; harvesting parts for harvesting the plant standing grain stalks in the field; a threshing device which is supported by the machine body frame and performs threshing treatment on the harvested cereal stalks; and the power transmission device is arranged at the lateral outer side of the threshing device body and transmits the power of the power source to the threshing device.

The present invention relates to a combine harvester, comprising: a feeding chain for supplying the harvesting cornstalks to the threshing device; a clutch mechanism that turns on/off (on/off) a driving force transmitted to the feed chain; and an operation unit for performing an on-off operation of the clutch mechanism by a driving force of the motor.

The invention relates to a combine harvester.

Background

< background art 1>

The combine harvester comprises: a side cover part which is arranged at the lateral outside of the power transmission device and covers the power transmission device from the lateral outside of the power transmission device; and a lower cover part which is arranged between the lower end part of the side cover part and the lower end part of the threshing device along the front-back direction of the machine body and covers a gap between the lower end part of the side cover part and the lower end part of the threshing device.

As such a combine harvester, there is a combine harvester shown in patent document 1, for example. The combine harvester disclosed in patent document 1 includes a plurality of lateral covers as side cover portions, and includes a front lower cover as a lower cover portion, a middle lower cover, and a rear lower cover.

< background art 2>

As a combine harvester having the above-described structure, patent document 2 describes the following technique: a clutch mechanism (in the literature, a "frame clutch") is provided at a feed end position of the feed chain, and the clutch mechanism is switched from an on state to an off state by pulling a wire by a driving force of a motor provided in the body.

Patent document 3 describes the following technique: a cam is provided on a fulcrum shaft rotated by a driving force of a motor by an electric motor (referred to as a "clutch motor" in the literature), and a cam follower (referred to as an "operating portion" in the literature) is provided in contact with a cam surface of the cam, so that when the fulcrum shaft is rotated by the driving force of the motor, the operating cable can be operated by a swinging force of the cam follower to turn on/off the clutch mechanism.

Note that, patent document 3 shows the following structure: the harvesting clutch and the threshing clutch can be turned on and off by providing a plurality of cams on the support shaft and a plurality of cam followers corresponding to the cams.

< background art 3>

There is a combine harvester including: a harvesting unit for harvesting crops in a field; a threshing device which is supported by the machine body and performs threshing treatment on crops harvested by the harvesting part; the shredding device is connected to the rear part of the threshing device, and receives threshing and stalk discharging discharged by the threshing device and performs shredding treatment; the shredding device is supported so as to be swingable about a swing shaft core in the up-down direction.

As such a combine harvester, there is a combine harvester shown in patent document 4, for example. The combine harvester disclosed in patent document 4 includes a harvesting unit as a harvesting unit and a straw cutter as a chopper.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2018-82650

Patent document 2: japanese patent laid-open No. 2015-198580

Patent document 3: japanese patent laid-open No. 2001-224229

Patent document 4: japanese patent No. 4829488

Disclosure of Invention

Technical problem to be solved by the invention

< technical problem 1>

In the case of using the conventional technique related to the lower cover, even if dust such as straw chips scattered around the threshing device enters the gap between the side cover and the threshing device, the dust can fall out from the opening provided in the lower cover. However, the soil splashed by the crawler belt traveling device and flying toward the lower cover portion tends to easily enter the gap between the side cover portion and the threshing device from the opening portion.

A first object of the present invention is to provide a combine harvester capable of separating dust entering a gap between a side cover and a threshing device from a lower cover, and easily preventing soil splashed by a crawler travel device from entering the gap between the side cover and the threshing device from the lower cover.

< technical problem 2>

The clutch mechanism described in patent document 2 is configured to support an output gear at an output shaft in an idle state, to slidably spline-fit a transmission tube to the output shaft in a direction along a shaft core, to determine a position of the transmission tube so that a claw portion of the transmission tube engages with a claw portion of the output gear, to put the clutch mechanism in an on state (transmission state), and to separate the claw portions to put the clutch mechanism in an off state (cut-off state).

Since the feed chain has a function of reliably conveying the harvested stalks in a clamped state, it is not suitable to use a friction clutch for switching on and off the driving force transmitted to the feed chain, and as described in patent document 2, a clutch in which a claw portion is engaged with a claw portion can be used. Further, the clutch mechanism that controls the driving and stopping of the feed chain includes a spring that acts a biasing force to maintain the on state.

Here, as described in patent document 3, in a structure in which a cam body is rotated by a driving force of a motor and tension of an operation wire is controlled in association with displacement of a cam follower that contacts a cam surface of the cam body, since a change in tension of the operation wire is small, it is considered that it is difficult to shift from an off state to an on state.

That is, even if the clutch mechanism is configured to be maintained in the on state by the urging force of the spring as described in patent document 2, the transmission tube moves at a low speed in the process of controlling the tension of the wire when the clutch mechanism is switched from the off state to the on state as described in patent document 3, and even if the claw portion of the transmission tube contacts the claw portion of the output gear, the urging force is applied in the direction of separating the claw portion from each other until the claw portion is properly engaged, and it takes an excessive time to reach the engaged state.

For this reason, a second object of the present invention is to provide a combine harvester: even if the clutch mechanism is controlled in conjunction with the displacement of the cam follower contacting the cam surface of the cam body, the clutch mechanism can be promptly and reliably brought into the on state.

< technical problem 3>

In the combine of patent document 4, the shredding device is swingable by providing a hinge mechanism, and the hinge mechanism includes: a support unit provided on the machine body side and supporting the shredder from below so that the shredder can swing around a swing shaft core in the up-down direction; a support shaft in the up-down direction of the machine body, which is provided in one of the support portion and the shredding device in a state in which the swing shaft core is used as a shaft core; and a connecting member provided on the other of the support portion and the shredding device, and having a hole portion into which the support shaft is inserted; the hinge mechanism enables the shredder to swing around the swing axis.

The hinge mechanism allows the support shaft to be pulled out from the hole portion to separate the shredder from the support portion upward, and the shredder can be detached from the support portion by simply separating the support shaft from the coupling member. However, if an operation force is generated to lift the shredder, for example, when the shredder moves backward to cause the lower part of the shredder to hit a ridge, the shredder may be separated from the support.

A third object of the present invention is to provide a combine harvester capable of easily detaching a chopper with a countermeasure of a simple construction and preventing accidental falling of the chopper.

Means for solving the technical problems

< solution means 1>

In order to achieve the first object described above, the following means are provided.

The combine harvester of the invention comprises: a crawler travel device supporting the machine body frame; a harvesting part for harvesting the plant-standing cereal stalks in the field; a threshing device which is supported by the machine body frame and performs threshing treatment on the harvested cereal stalks; the power transmission device is arranged at the lateral outer side of the threshing device body and transmits the power of a power source to the threshing device; a side cover portion provided on a lateral outer side of the power transmission device and covering the power transmission device from the lateral outer side of the power transmission device; and a lower cover portion provided between a lower end portion of the side cover portion and a lower end portion of the threshing device in a machine body front-rear direction, and covering a gap between the lower end portion of the side cover portion and the lower end portion of the threshing device; the lower cover portion includes a plurality of inclined members provided in a state inclined in a side view of the machine body and spaced apart from each other in a front-rear direction of the machine body, at a portion located above a rear end portion of the crawler belt, the inclined members allowing dust to fall downward from a gap between the side cover portion and the threshing device and blocking earth and mud splashed by the crawler belt.

According to this configuration, since the inclined members are arranged at intervals, even if dust enters the gap between the threshing device and the side cover, the dust that has entered comes off from the inclined members. Since the inclined member is located at a portion of the lower cover portion which is likely to contact with the soil splashed by the crawler belt, the soil is prevented from entering the gap between the threshing device and the side cover even if the soil is splashed by the crawler belt.

In the present invention, it is preferable that the tilting member is tilted so as to intersect with a soil splashing direction of the crawler belt.

According to this structure, the soil blocked by the inclined member is less likely to scatter toward the gap between the threshing device and the side cover, and thus the entry of the soil into the gap between the threshing device and the side cover is more likely to be avoided.

In the present invention, it is preferable that the front side tilting member of the plurality of tilting members is tilted in a state of being tilted backward and upward, and the rear side tilting member of the plurality of tilting members is tilted in a state of being tilted backward and downward.

According to this configuration, when the crawler belt is configured to splash soil upward, the splashed soil is likely to be caught by the front inclined member inclined upward rearward, and when the crawler belt is configured to splash soil upward, the splashed soil is likely to be caught by the rear inclined member inclined downward rearward, so that the soil is more unlikely to enter the gap between the threshing device and the side cover.

In the present invention, it is preferable that the tilting member located on the front side with respect to the rear end portion of the crawler travel device of the plurality of tilting members is tilted in a state of being tilted upward and rearward, and the tilting member located on the rear side with respect to the rear end portion of the crawler travel device of the plurality of tilting members is tilted in a state of being tilted downward and rearward.

In the crawler travel device during the forward travel, a belt portion of the crawler belt that moves along a rear lower portion of a wheel body located at a rear end portion of the crawler travel device moves in a rear-upper direction, and a splash direction of the soil splashed by the belt portion is the rear-upper direction. A belt portion of the crawler belt, which moves along the rear upper portion of the wheel body, moves in the upward and forward direction, and the splash direction of the mud splashed by the belt portion is the upward and forward direction.

According to this structure, not only the earth splashed in the upward and rearward direction is easily caught by the inclined member in the upward and rearward state, but also the caught earth is less likely to scatter toward the gap between the threshing device and the side cover. Not only is the mud splashed in the upward front direction easily blocked by the inclined member in a state of being inclined downward rearward, but also the blocked mud is difficult to scatter toward the gap between the threshing device and the side cover, so that the mud can be effectively prevented from entering the gap between the threshing device and the side cover.

In the present invention, it is preferable that upper ends of the inclined members adjacent to each other at a position immediately above the rear end of the crawler belt running device are connected in a mountain shape.

According to this structure, since the adjacent inclined members are connected to each other to reinforce each other, even if the splashed soil collides with the inclined members strongly, the inclined members are hardly deformed. When members such as frames are present between adjacent inclined members, the members are covered from above in a mountain shape, so that dust can be prevented from falling onto the members.

In the present invention, it is preferable that the inclined member is cantilevered from a side wall of the threshing device toward the outside in the lateral direction.

According to this configuration, the width of the interval between the tilting members in the lateral width direction of the tilting members is wider than in the case where the tilting members are supported by the double arms, and therefore dust is liable to fall down. Further, when the side cover portion is removed, the inclined member remains on the threshing device side in a state of being supported by the side wall of the threshing device, and therefore maintenance work such as removal of dust adhering to the inclined member is easy to perform.

In the present invention, it is preferable that the tilting member is detachably supported.

According to this configuration, the tilting member can be detached, and therefore cleaning, repair, and the like of the tilting member can be easily performed.

In the present invention, it is preferable that a guide member for guiding dust in a gap between the side cover portion and the threshing device to the rear lower side is provided at a position higher than the inclined member

According to this configuration, since dust entering the gap between the side cover and the threshing device is guided rearward and downward by the guide member, dust is liable to fall rearward of the inclined members, and it is possible to prevent dust from clogging between the inclined members.

In the present invention, it is preferable that the lower cover portion includes a support member that is engaged with the side cover portion and supports the side cover portion.

According to this configuration, the lower cover portion can be flexibly used as the mounting member for mounting the support member to the object to be mounted, and the side cover portion can be supported by the support structure of this simple structure, so that the side cover portion can be inexpensively equipped.

< means for solving the problems 2>

In order to achieve the second object described above, the following means are provided.

The combine harvester of the invention is characterized in that the combine harvester comprises: a feeding chain for feeding the threshing device with harvesting stalks; a clutch mechanism for switching on/off the driving force transmitted to the feed chain; and an operation unit that transmits a driving force of the motor to the clutch mechanism by a linking mechanism so that the clutch mechanism is turned off by a forward rotation of the motor and is turned on by a reverse rotation of the motor; the operation unit includes: a cam body rotated by a driving force of the motor; a cam follower that transmits a displacement following a cam surface of the cam body to the interlocking mechanism; and a speed increasing mechanism that increases the displacement speed of the cam follower when the motor is reversed in a state in which the clutch mechanism is in an off state, compared to the displacement speed of the cam follower when the motor is rotated in a normal direction.

According to this feature, when the motor is reversed with the clutch mechanism in the off state, the displacement of the cam follower that follows the cam surface in association with the rotation of the cam body is transmitted to the clutch mechanism via the link mechanism, and the on operation of the clutch mechanism is enabled. In particular, when the motor is reversed, the speed increasing mechanism increases the displacement speed of the cam follower more than the displacement speed of the cam follower when the clutch mechanism is operated to be disconnected, so that even if the clutch mechanism is a clutch mechanism that is engaged with each other, for example, the movement speed of the pawls in the direction in which the pawls are engaged with each other can be increased in a short time.

Thus, a combine harvester is constituted as follows: even if the clutch mechanism is controlled in conjunction with the displacement of the cam follower contacting the cam surface of the cam body, the clutch mechanism can be promptly and reliably brought into the on state.

As another configuration, the speed increasing mechanism may have a restriction portion that, when the motor is reversed in a state in which the clutch mechanism is in an off state, continues rotation of the cam body accompanying the reversal of the motor, temporarily suppresses displacement of the cam follower, and thereby, by releasing the restriction by the restriction portion, increases the displacement speed of the cam follower.

Thus, when the motor is reversed, the rotation of the cam body is continued and the displacement of the cam follower is suppressed by the restricting portion, and then, the cam follower can be displaced to a position contacting the cam surface in a short time with the restriction released. This makes it possible to increase the operating speed of the clutch mechanism in the on direction, and to ensure the on operation of the clutch mechanism.

As another configuration, the clutch mechanism may include a shift member having a claw and a transmission member having a claw engaged with the claw, the shift member may be configured to be switchable between a transmission position in which the claw is engaged with the claw and a cut-off position in which the claw is separated from the claw, the combine may include a biasing member for biasing the shift member toward the transmission position, the cam follower may be provided at a swinging end of an arm body swingably supported, the interlocking mechanism may be configured by an operation wire for operating the shift member to a cut-off position against a biasing force of the biasing member by a pulling operation accompanying swinging of the arm body, and the speed increasing mechanism may be configured to release the restriction by a release arm that moves in association with rotation of the cam body after the swinging of the arm body is restricted by the restriction portion.

Thus, when the motor is reversed in a state where the clutch mechanism is in the off state, the cam body continues to rotate in the restrained state by restraining the swing of the arm body by the restraining portion, and therefore, the cam follower is separated from the cam surface of the cam body, and the separation distance is enlarged. In addition, when the clutch mechanism is in the off state, the biasing force of the biasing member acts in a direction to move the shift member to the transmission position, and the biasing force acts on the operation arm via the operation wire. In this way, when the restriction on the arm body is released by the release arm, the arm body can swing freely, and as a result, the engagement claw and the engaged claw are caused to move by a necessary stroke at high speed, and the clutch mechanism can be reliably brought into the on state.

As another configuration, the restraining portion may be configured to restrain the swing of the arm body by bringing a part of the arm body or a member linked to the arm body into contact with the ball, and may be configured to release the contact of the ball against the urging force of the spring when the release force is applied from the release arm, wherein the ball is biased to protrude by the spring, and the ball guide is configured to determine the protruding limit of the ball.

Thus, the restraining portion can be constituted by a simple member of the spring and the ball, and the restraint can be easily released.

< means for solving the problems 3>

In order to achieve the third object described above, the following means are provided.

The combine harvester of the invention comprises: a harvesting unit for harvesting crops in a field; a threshing device which is supported by the machine body and performs threshing treatment on the crop harvested by the harvesting part; a shredding device connected to the rear part of the threshing device, and receiving and shredding the threshing and discharging stalks discharged by the threshing device; a support unit provided on the machine body side and configured to support the shredder from below so that the shredder can swing around a vertical swing axis; and a hinge mechanism having a support shaft provided in a vertical direction of one of the support portion and the shredder with the swing shaft as a shaft core, and a coupling member provided in the other of the support portion and the shredder and having a hole portion into which the support shaft is inserted, the hinge mechanism being configured to enable the shredder to swing around the swing shaft core; the hinge mechanism includes a drop prevention mechanism that is capable of switching between an operating state in which the support shaft is prevented from being pulled out from the hole portion and the shredder is separated upward from the support portion, and an operating released state in which the support shaft is allowed to be pulled out from the hole portion, and the drop prevention mechanism includes a flange member that is attached to a distal end portion of the support shaft in an insertion direction in which the support shaft is inserted into the coupling member, and has a portion protruding outward than an outer diameter of the hole portion, and a bolt that is fastened to the distal end portion in the insertion direction to detachably fix the flange member to the distal end portion.

According to this configuration, the screw and the flange member are removed from the support shaft, so that the anti-disengagement mechanism is switched to the operation released state, and the support shaft is allowed to be pulled out from the hole portion and the shredder is separated upward from the support portion, whereby the shredder can be removed from the support portion. By attaching the bolt and the flange member to the support shaft, the escape prevention mechanism is switched to the active state, and the support shaft is prevented from being pulled out from the hole portion and the shredder is prevented from being separated upward from the support portion, so that the shredder does not separate from the support portion even if an operation force for lifting the shredder is generated.

Therefore, by simply taking measures with a simple structure including the bolts and the flange members, the shredder can be easily detached from the support portion at low cost, and the shredder can be prevented from being detached by an unexpected lifting operation force.

In the present invention, it is preferable that the release mechanism includes a cylindrical member that is fitted in a portion of the support shaft protruding from the hole portion in the insertion direction and extends in the insertion direction so as to extend across the flange member and the coupling member, and the cylindrical member is abutted against an outer peripheral portion of the hole portion of the coupling member by tightening the bolt.

According to this configuration, the tubular member functions as a boss portion provided on the coupling member so as to fit the coupling member into the support shaft, so that the rattling and tilting between the coupling member and the support shaft can be suppressed, and the shredder can be supported so as to be less likely to rattle or tilt.

In the present invention, it is preferable that the tubular member is fixed to the outer peripheral portion.

According to this configuration, since the tubular member functions as the boss portion provided in the coupling member in a fixed state so as to fit the coupling member into the support shaft, the rattling and tilting between the coupling member and the support shaft can be effectively suppressed, and the tubular member can be firmly supported, so that rattling and tilting of the shredder can be prevented.

In the present invention, it is preferable that the hinge mechanism includes an upper hinge mechanism on an upper side and a lower hinge mechanism on a lower side, and the release mechanism in the lower hinge mechanism includes the tubular member.

In this configuration, since the cylindrical member functions as the boss portion of the coupling member in the lower hinge mechanism located on the fulcrum side when the shredder is rocked or tilted, the rocking or tilting of the shredder can be effectively prevented by the countermeasure that only the lower hinge mechanism has a simple structure of the cylindrical member.

In the present invention, it is preferable that one of the supporting portion and the shredding device is provided with a shaft supporting member for supporting the supporting shaft, and the hinge mechanism includes an upper hinge mechanism and a lower hinge mechanism, wherein the shaft supporting member is in contact with the connecting member in the vertical direction, and the shaft supporting member is separated from the connecting member in the vertical direction.

In comparison with the case where the upper hinge mechanism and the lower hinge mechanism are manufactured by bringing the shaft support member into contact with the connecting member in both the upper hinge mechanism and the lower hinge mechanism, even if the upper hinge mechanism and the lower hinge mechanism are manufactured with lower manufacturing accuracy, assembly errors due to manufacturing accuracy are absorbed by separation of the shaft support member and the connecting member, and the shredder can be supported in a state free from assembly failure, so that the support structure of the shredder can be easily obtained.

In the present invention, it is preferable that the connecting member is a plate-like member.

According to this configuration, since the coupling member is a member of a simple shape, the hinge mechanism can be compactly obtained.

Drawings

Fig. 1 is a left side view showing the whole of the combine harvester according to embodiment 1.

Fig. 2 is a longitudinal cross-sectional side view showing the threshing device of embodiment 1.

Fig. 3 is a side view showing the power transmission device and the lower cover portion according to embodiment 1.

Fig. 4 is a plan view showing the lower cover portion of embodiment 1.

Fig. 5 is a perspective view showing a front lower cover portion, a rear lower cover portion, and a lower cover portion in embodiment 1.

Fig. 6 is a perspective view showing the front lower cover, the middle lower cover, and the rear lower cover in the detached state of embodiment 1.

Fig. 7 is a cross-sectional view of the front lower cover portion of embodiment 1.

Fig. 8 is a side view of the rear lower cover portion of embodiment 1.

Fig. 9 is a cross-sectional view of IX-IX of fig. 4.

Fig. 10 is an X-X sectional view of fig. 4.

Fig. 11 is a sectional view of section XI-XI of fig. 8.

Fig. 12 is a cross-sectional view of section XII-XII of fig. 8.

Fig. 13 is a cross-sectional view showing a supporting structure of the tool according to embodiment 1.

Fig. 14 is an explanatory diagram of the mounting and returning aspects of the swing sorting apparatus according to embodiment 1.

Fig. 15 is a side view of the combine harvester according to embodiment 2.

Fig. 16 is a plan view of the combine harvester according to embodiment 2.

Fig. 17 is a diagram showing a clutch mechanism and a clutch operation means in an on state according to embodiment 2.

Fig. 18 is a diagram showing a clutch mechanism and a clutch operation unit in a disengaged state according to embodiment 2.

Fig. 19 is a diagram immediately after the release pin abuts on the release arm in the constrained state in embodiment 2.

Fig. 20 is a diagram immediately before the restraint of the release arm is released by the contact of the release pin in embodiment 2.

Fig. 21 is an enlarged view showing the structure of the release arm and the restraint portion according to embodiment 2.

Fig. 22 is a left side view showing the whole of the combine harvester according to embodiment 3.

Fig. 23 is a plan view showing the rear part of the combine harvester according to embodiment 3.

Fig. 24 is a rear view showing a supporting structure of the shredder of embodiment 3.

Fig. 25 is a side view showing a supporting structure of the shredder of embodiment 3.

Fig. 26 is a plan view showing the hinge mechanism in the opened state of the shredder of embodiment 3.

Fig. 27 is a side view showing a support structure provided with a shredder according to another embodiment.

Description of the reference numerals

< embodiment 1>

1. Frame of machine body

2. Crawler travel device

5A harvesting part

26. Source movement part (Engine)

27. Power transmission device

45. Side wall

53. Side cover (front lower side cover)

54. Side cover (front lower side cover)

60. Lower cover part

63. Part of the lower cover (rear lower cover)

68. Tilting member

68f are located on the front side

68r on the rear side

73. Guide member

76. Support member

< embodiment 2>

5. Threshing device

17. Feeding chain

25a drive gear (Transmission component)

26T engaged claw

26. Displacement component

26T snap claw

34. Motor with a motor housing

35. Cam body

35a cam surface

39. Cam follower

42. Release arm

45. Spring

46. Ball bearing

47. Ball guide

A operation unit (operation part)

R constraint part (speed increasing mechanism)

W operating line (linkage)

FC clutch mechanism

S1 first spring (force applying component)

S2 second spring (force applying component)

< embodiment 3>

5A harvesting part

8. Threshing device

11. Shredding device

16. Support part

30. Hinge mechanism

Hinge mechanism above 30U

Hinge mechanism below 30D

31a shaft support member

32. Support shaft

33. Connecting component

33a hole part

40. Anti-disengaging mechanism

41. Barrel component

42. Flange member

43. Bolt

Detailed Description

< embodiment 1>

An embodiment of the present invention will be described below as an example based on the drawings.

Note that, in the following description, regarding the traveling body of the combine, the direction of the arrow F shown in fig. 1 is referred to as "front body", the direction of the arrow B is referred to as "rear body", the direction of the arrow U is referred to as "upper body", the direction of the arrow D is referred to as "lower body", the direction of the front side of the paper surface of fig. 1 is referred to as "left body", and the direction of the back side of the paper surface is referred to as "right body".

[ regarding the entirety of the combine ]

As shown in fig. 1, the combine includes a travel machine body having a machine body frame 1 formed by connecting a plurality of steel materials such as square pipe materials, and a pair of right and left crawler travel devices 2 supporting the machine body frame 1. At a lateral right portion of the front portion of the traveling machine body, a cab 4 having a cab 3 is formed. A harvesting conveyor 5 is provided at a lateral left portion of the front portion of the traveling machine body. The harvesting transport section 5 includes a harvesting section 5A provided at the front of the harvesting transport section 5 and a transport section 5B provided at the rear of the harvesting transport section 5. The harvesting unit 5A harvests plant roots of plant stalks of rice, wheat, etc. which are planted on a plurality of ridges by the push-type harvesting device 7 while supporting the plant stalks by the supporting device 6. The conveying section 5B conveys the harvested stalks harvested by the harvesting section 5A rearward. A threshing device 8 and a grain box 9 are arranged in parallel in the lateral direction at the rear part of the machine body frame 1. The threshing device 8 is located behind the conveyor 5B, and the grain box 9 is located behind the driver 4. The threshing device 8 receives the harvested stalks conveyed by the conveying unit 5B, and performs threshing processing for threshing the spike tip side portions of the received harvested stalks and sorting processing for sorting the threshed grains and dust obtained by the threshing processing. A threshing and straw-discharging cutter 11 for cutting the threshing and straw-discharging discharged from the threshing device 8 is provided behind the threshing device 8. The kernel obtained by the threshing device 8 is supplied to the kernel box 9 by the grain lifting device 12 and stored in the kernel box 9. A grain discharging device 13 for taking out the fallen grains from the grain tank 9 is extended from the rear portion of the grain tank 9.

[ Structure for threshing device ]

As shown in fig. 2, the threshing device 8 includes a threshing unit 8A formed at an upper portion of the threshing device 8 and a sorting unit 8B formed below the threshing unit 8A.

As shown in fig. 2, the threshing unit 8A includes a threshing chamber 14, a threshing cylinder 15 rotatably provided in the threshing chamber 14, and a screen 16 provided around the outer periphery of the threshing cylinder 15 in a state of being along the threshing cylinder 15. The threshing cylinder 15 is driven to rotate with the threshing cylinder axis P placed in front of and behind the machine body as the rotation center. A separation drum 17 is rotatably provided behind the threshing chamber 14. The separation drum 17 is driven to rotate with the drum shaft P2 in the machine body transverse direction as the rotation center. A threshing feed chain 18 is provided laterally outside the threshing chamber 14.

As shown in fig. 2, the sorting unit 8B includes a swing sorting device 19 provided below the threshing chamber 14, a winnowing machine 20 provided below the front part of the swing sorting device 19, a first blower fan 21 provided in front of the winnowing machine 20, and a second blower fan 22 provided behind the winnowing machine 20. A primary auger 23 is provided between the air separator 20 and the second blower fan 22. A secondary auger 24 is provided behind the second blower fan 22. A guide plate 42 extends from the rear of the swing-sorting device 19 toward the primary auger 23. The guide plate 42 is formed of a flexible sheet member, and guides the primary processed objects sorted by the swing sorting device 19 to flow down the primary auger 23.

In the threshing device 8, the root side portion of the harvested stalks conveyed by the starting end receiving and conveying unit 5B of the threshing feed chain 18 is gripped and conveyed by the threshing feed chain 18 toward the rear of the threshing device 8 in a state where the spike side portion of the harvested stalks is inserted into the threshing chamber 14, and the spike side portion is threshed by the threshing cylinder 15. The threshed grains drop down to the sorting section 8B through the treated matter drain hole of the screen 16. Threshing and straw discharging is carried by the threshing feed chain 18 and discharged backward from the threshing chamber 14. The discharged threshing bars are subjected to separation treatment by a separation drum 17, and the shed grains are taken out from the threshing bars, and the taken shed grains fall down to a sorting section 8B. The separated grains falling from the screen 16 and the threshing and discharging straw to the sorting unit 8B are received by the swing sorting device 19, and the received separated grains are sorted into fine grains as primary grains, untreated grains as secondary grains, and dust by swing sorting by the swing sorting device 19 and air separation by the sorting air from the air separator 20, the first air-blowing fan 21, and the second air-blowing fan 22. The fine particles flow into the primary auger 23 and are transported by the primary auger 23 to the grain lifting device 12. Untreated pellets flow into the secondary auger 24, and are returned to the starting end of the swing sorting apparatus by the secondary auger 24 and a return device 25 connected to the secondary auger 24 at the lateral outside of the machine body.

As shown in fig. 1 and 3, a power transmission device 27 for transmitting power of an engine 26 as a power source provided in the front of the traveling machine body to the threshing unit 8A and the sorting unit 8B, and a cross cover K for covering the power transmission device 27 are provided laterally outward of the machine body of the threshing unit 8. In the present embodiment, the power transmission device 27 is provided on the left and right sides of the threshing device 8 in the machine body, but the present invention is not limited to this, and may be provided on the right and left sides of the threshing device 8 in the machine body. In the present embodiment, the engine 26 is provided as a power source, but the present invention is not limited to this, and an electric motor may be provided at the same time.

As shown in fig. 2, the power transmission device 27 includes an output pulley 28 provided in a transmission (not shown) to which power of the engine 26 is input, a first endless rotary belt 29 wound around the output pulley 28, a second endless rotary belt 30 corresponding to the first endless rotary belt 29 wound around the output pulley 28 inside the machine body in the lateral direction, a transmission pulley 32 linked to a primary pulley 31 that drives the primary auger 23, a third endless rotary belt 33 wound around the transmission pulley 32, and a fourth endless rotary belt 35 wound around a sorting pulley 34 that drives the swing sorting device 19.

The first endless rotating belt 29 is wound around the output pulley 28 and the primary pulley 31, and transmits the power of the output pulley 28 to the primary auger 23. The second endless rotating belt 30 is wound around the output pulley 28 and a separator pulley 36 that drives the separator 20, and transmits the power of the output pulley 28 to the separator 20. The third endless rotating belt 33 is wound around the transmission pulley 32, a secondary pulley 37 that drives the secondary auger 24, an input pulley 38a that drives a chain drive mechanism 38 of the threshing feeding chain 18, and a separation pulley 39 that drives the separation drum 17. The power transmitted from the output pulley 28 to the primary pulley 31 is transmitted to the secondary auger 24, the threshing feed chain 18, and the separator drum 17 through the third endless rotating belt 33. The fourth endless rotating belt 35 is wound around the drive pulley 41 and the sorting pulley 34, and the drive pulley 41 is linked to the power output pulley 40 around which the third endless rotating belt 33 is wound. The power transmitted from the output pulley 28 to the power output pulley 40 is transmitted to the swing-sorting device 19 through the transmission pulley 41 and the fourth endless rotating belt 35.

As shown in fig. 1 and 4, the horizontal cover K includes a side cover 50 and a lower cover 60, the side cover 50 is provided laterally outward of the body of the power transmission device 27 to cover the power transmission device 27 from laterally outward, and the lower cover 60 covers a gap between a lower end of the side cover 50 and a lower end 8f of the threshing device 8 between the lower end of the side cover 50 and the lower end 8f of the threshing device 8. In the present embodiment, as shown in fig. 4 and 5, the lower end portion 8f of the threshing device 8 is formed of a sidewall frame provided at the lower portion of the sidewall 45 of the threshing device 8 in a state extending in the machine body front-rear direction. The side wall frames are shared by frame portions constituting the body frame 1 in the body front-rear direction.

As shown in fig. 1, the side cover 50 is constituted by an upper side cover 50A constituting an upper portion of the side cover 50 and a lower side cover 50B constituting a lower portion of the side cover 50. The upper side cover 50A is constituted by a front upper side cover 51 constituting a front portion of the upper side cover 50A and a rear upper side cover 52 constituting a rear portion of the upper side cover 50A. The lower side cover 50B is constituted by a front lower side cover 53 constituting a front portion of the lower side cover 50B and a rear lower side cover 54 constituting a rear portion of the lower side cover 50B. As shown in fig. 5, a pulley cover 55 extending from the front lower cover 53 toward the threshing device and covering the output pulley 28 from the front is provided at the front end of the front lower cover 53. In the present embodiment, the side cover 50 is configured to be divided into four cover portions, but is not limited to this. For example, one of the upper side cover 50A and the lower side cover 50B may be configured by a single side cover, and the other of the upper side cover 50A and the lower side cover 50B may be configured to be separable into two covers. The entire side cover 50 may be formed as one side cover. The side cover 50 may be divided into two or more cover portions.

[ Structure for lower cover portion ]

As shown in fig. 3 and 4, the lower cover 60 includes: a front lower cover portion 61 that constitutes a portion of the lower cover portion 60 that is located above the front end side portion of the crawler travel device 2; a middle lower cover portion 62 that constitutes a portion of the lower cover portion 60 that is located above the middle portion of the crawler travel device 2; and a rear lower cover 63 that constitutes a portion of the lower cover 60 that is located above the rear end side portion of the crawler travel device 2.

As shown in fig. 3, 4, and 5, the front lower cover 61 includes an inclined portion 61a inclined in a state of being inclined forward and upward below the output pulley 28, and a rear portion 61b extending rearward from the rear of the inclined portion 61a in the front-rear direction of the threshing device 8. As shown in fig. 4, 5, and 6, a plurality of slit-shaped dust discharge holes 61c allowing dust to fall are formed only in the rear portion 61b of the inclined portion 61a and the rear portion 61b.

As shown in fig. 6 and 7, the front lower cover 61 is attached to a support 64 provided at the lower end 8f of the threshing device 8 by a connecting bolt 65. The front lower cover 61 is detachably supported by the threshing device 8.

As shown in fig. 3 and 4, the front lower cover 61 covers the output pulley 28 from below with the inclined portion 61a having no dust discharge hole, and allows dust entering the gap between the threshing device 8 and the side cover 50 to fall from the dust discharge hole 60c and covers the gap between the lower end portion of the side cover 50 (the lower end portion of the front lower side cover 53) and the lower end portion 8f of the threshing device 8.

As shown in fig. 3, 4, and 5, the middle-lower cover 62 is configured to have a plate shape extending in the front-rear direction of the threshing device 8 so as to span the lower position of the winnowing machine pulley 36 and the lower position of the primary pulley 31. As shown in fig. 4, 5, and 6, a plurality of slit-shaped through holes 62a that allow dust to fall and allow the air separator 20 to suck air are formed only in a front portion of the intermediate lower cover portion 62 that is located forward of the primary pulley 31 and below the air inlet 20a of the air separator 20. As shown in fig. 3, 5, and 6, a cover 80 that covers the primary pulley 31 from below and behind is formed at the rear end of the middle-lower cover 62. The cover portion 80 includes a first cover portion 81 integrally formed with the middle lower cover portion 62, a second cover portion 82 extending forward and upward from the first cover portion 81, and a third cover portion 83 extending forward and upward from the second cover portion 82. The third cover 83 is formed of a plate member having elasticity.

As shown in fig. 3, 6, and 8, the middle-lower cover 62 is configured to be attached to a support 66 provided at a lower end 8f of the threshing device 8 by a connecting bolt 67. The middle-lower cover 62 is detachably supported by the threshing device 8.

As shown in fig. 3, 4, and 10, the middle lower cover 62 allows the air separator 20 to suck air from the outside of the horizontal cover K through the through hole 62a, and allows dust entering the gap between the threshing device 8 and the side cover 50 to fall from the through hole 62a, and covers the primary pulley 31 from the rear lower side with the cover 80, and covers the gap between the lower end of the front lower side cover 53, which is the lower end of the side cover 50, and the lower end 8f of the threshing device 8.

As shown in fig. 3, 4, and 5, the rear lower cover 63 includes a plurality of inclined members 68, and the plurality of inclined members 68 are arranged in the front-rear direction of the machine body while being inclined in the side view of the machine body and while being spaced apart by an interval S in the front-rear direction of the machine body. The width of the space S between the adjacent inclined members 68 is set to be a width that can remove dust that has entered the gap between the threshing device 8 and the side cover 50.

Arrows X and Z shown in fig. 8 indicate the direction in which the mud splashed by the crawler belt 2a at the rear end portion of the crawler belt running device 2 during the forward movement splashes.

That is, in the crawler travel device 2 at the time of traveling, the belt portion 2R of the crawler 2a that moves along the rear lower portion of the wheel body 2R located at the rear end portion of the crawler travel device 2 moves in the upward-rearward direction, and the mud splashed by the belt portion 2R splashes upward rearward as indicated by the arrow Z. The belt portion 2f of the crawler belt 2a, which moves along the rear upper portion of the wheel body 2R, moves in the upward front direction, and the earth splashed by the belt portion 2f splashes upward front direction indicated by an arrow X.

As shown in fig. 3 and 8, the inclined member 68f of the plurality of inclined members 68, which is located on the front side with respect to the rear end portion of the crawler belt 2, is inclined in a direction intersecting the soil splashing direction (direction indicated by an arrow X) of the belt portion 2f, so as to reliably block the soil splashed forward and upward by the belt portion 2 f. The inclined member 68 located on the rear side with respect to the rear end portion of the crawler belt running device 2 among the plurality of inclined members 68 is inclined in a direction intersecting the soil splashing direction (direction indicated by an arrow Z) of the belt portion 2r to reliably block the soil splashed rearward and upward by the belt portion 2 r.

As shown in fig. 4, 8, and 9, the rear lower cover 63 allows dust entering the gap between the threshing device 8 and the side cover 50 to fall from the space S between the inclined members 68, and the soil splashed upward rearward by the crawler 2 is blocked by the inclined members 86r inclined downward rearward, and the soil splashed upward forward by the crawler 2 is blocked by the inclined members 68f inclined upward rearward, making it difficult for the soil to enter the gap between the threshing device 8 and the side cover 50, and covers the gap between the lower end of the front lower side cover 53, which is the lower end of the side cover 50, and the lower end 8f of the threshing device 8, and the gap between the lower end of the rear lower side cover 54, which is the lower end of the side cover 50, and the lower end 8f of the threshing device 8.

As shown in fig. 8, the upper ends of the inclined members 68 adjacent to each other at a position immediately above the rear end of the crawler belt 2 are connected in a mountain shape. The frame members 70 passing between the adjacent inclined members 68 in the transverse direction of the machine body are covered from above by the inclined members 68 connected in a mountain shape.

As shown in fig. 4, 5 and 6, the plurality of inclined members 68 are detachably supported by the side wall 45 so as to extend and protrude from the side wall 45 of the threshing device 8 in a cantilever manner toward the lateral outside.

Specifically, as shown in fig. 6 and 8, the plurality of tilting members 68 from the forefront tilting member 68 to the tilting member 68 adjacent to the tilting member 68 that is tilted rearward and downward among the tilting members 68 that are connected to the upper part in a mountain shape at the rear side are a first tilting member group in which one holding portion 71 is provided in the first tilting member group, and the one holding portion 71 is connected to only the threshing device side end portion of all the tilting members 68 in the first tilting member group, thereby holding all the tilting members 68 in the first tilting member group. The front portion of the holding portion 71 is provided with a hook portion 71a. The front portion of the holding portion 71 is detachably engaged with the lower end portion 8f of the threshing device 8 by a hook portion 71a. The rear portion of the holding portion 71 is detachably coupled to a support portion 72 provided at the lower end portion 8f of the threshing device 8 by a coupling bolt. The plurality of tilting members 68 extending from the tilting member 68 which is tilted rearward and downward among the tilting members 68 which are connected rearward and upward in a mountain-like shape, and which are provided to be separated from each other by one tilting member 68, to the rearmost tilting member 68, are a second tilting member group in which the holding portion 71 which is connected only to the threshing device-side end portions of all the tilting members 68 of the second tilting member group is provided, like the holding portion 71 of the first tilting member group. The holding portion 71 of the second inclined member group is detachably coupled to the lower end portion 8f of the threshing device 8 by a hook portion 71a and a coupling bolt, similarly to the holding portion 71 of the first inclined member group.

Even if the front lower cover 53 and the rear lower cover 54 are detached, all the inclined members 68 remain on the threshing device side in a state of being cantilever-supported by the threshing device 8. In the first and second tilting members, the holding portion 71 is removed from the supporting portion 72, so that all of the tilting members 68 of the first and second tilting members can be removed from the threshing device 8.

As shown in fig. 3, a guide member 73 is provided at a position higher than the inclined member 68. The guide member 73 is supported by the side wall 45. The guide member 73 has a guide surface inclined rearward and downward at the upper part, and guides the dust guide surface that enters the gap between the threshing device 8 and the side cover 50 to flow downward rearward and downward. Dust entering the gap between the threshing device 8 and the side cover 50 is easily discharged to the rear of the rear lower cover 63, and the dust is less likely to clog the space between the inclined members 68.

As shown in fig. 5, 7, and 8, a front-rear support member 75 for detachably supporting the front lower cover 53 and a front-rear support member 76 for detachably supporting the rear lower cover 54 are provided on the machine body of the threshing device 8 laterally to the left and to the outside.

As shown in fig. 5, 6, 7, and 8, the two support members 75 for supporting the front lower cover 53 are detachably supported by a support portion 77 provided at the lower end portion 8f of the threshing device 8 by means of a connecting bolt. The two support members 75 are provided with locking portions 75a at two upper and lower positions. As shown in fig. 11, the support member 75 supports the front lower cover 53 by engaging the lower locking portion 75a with the hook 53a provided at the lower portion of the front lower cover 53 and engaging the upper locking portion 75a with the locking device 53b provided at the upper portion of the front lower cover 53.

As shown in fig. 5, 6 and 8, two support members 76 for supporting the rear lower cover 54 are supported by the rear lower cover 63. The rear lower cover 63 is flexibly used as a mounting member for mounting the support member 76 to the threshing device 8. Specifically, the front support member 76 of the two support members 76 is supported by the holding portion 71 of the first tilting member group as shown in fig. 5, 6, and 8. The rear support member 76 of the two support members 76 is supported by the holding portion 71 of the second tilting member group as shown in fig. 5, 6, and 8. The two support members 76 and the holding portion 71 are coupled by welding.

As shown in fig. 12, the two support members 76 are provided with locking portions 76a for supporting the rear lower cover 54 at two upper and lower positions. As shown in fig. 12, the two support members 76 support the rear lower cover 54 by engaging the lower locking portions 76a with the hooks 54a provided at the lower portion of the rear lower cover 54 and engaging the upper locking portions 76a with the locking devices 54b provided at the upper portion of the rear lower cover 54.

As shown in fig. 1, a fuel tank 90 for an engine is provided behind the threshing device 8. As shown in fig. 2, a tank cover 91 for covering the fuel tank 90 from above is detachably provided above the fuel tank 90. In the space between the tank cover 91 and the fuel tank 90, a plate-shaped tool 92 for loading the swing-type sorting device 19 taken out from the sorting unit 8B back to the sorting unit 8B is housed in a state supported on the back surface side of the tank cover 91. As shown in fig. 13, the housing 91 is detachably supported by a support frame 93 engaged with a hook portion 91a of the housing 91 and a member for supporting a coupling member 98 provided in the housing 91.

The tool 92 is detachably supported by the housing 91 based on the support structure shown in fig. 13. The rear end 92r of the tool 92 is engaged with a holding portion 91b formed in the housing 91, and the rear end portion of the tool 92 is detachably supported by the holding portion 91b. The distal end portion of the tool 92 is detachably supported by a bolt 94 and a wing nut 95 at the distal end portion of the housing 91.

The operation of returning the swing-sorting device 19 to the sorting section 8B using the tool 92 is performed based on the returning collar shown in fig. 14.

When the bin cover 91 is removed from above the fuel tank 90 and the swing-sorting device 19 is inserted into the sorting section 8B from the opening 96 (see fig. 2) in the rear portion of the threshing device 8, the swing-sorting device 19 is not brought into contact with the bin cover 91. The tool 92 carried by the tank cover 91 removed from above the fuel tank 90 is detached from the tank cover 91. The tool 92 detached from the casing 91 is inserted into the sorting section 8B from the opening 96 at the rear of the threshing device 8, and is disposed above the secondary auger 24. The rear end 92r of the tool 92 is engaged with the end 97 of the sorting unit bottom plate to prevent the tool 92 from moving forward. When the tool 92 is not moved away, the swing sorting device 19 is inserted from the opening 96, and the free end portion of the guide plate 42 is placed on the tool 92 in a state where the free end portion of the guide plate 42 is positioned further forward than the base end portion. When the free end portion of the guide plate 42 is placed on the tool 92, the swing classification device 19 is moved forward, and the free end portion of the guide plate 42 is slid forward over the tool 92. When the swing separator 19 reaches the assembled position, as shown in fig. 2, the guide plate 42 extends from the swing separator 19 toward the primary auger 23, and the rear end side portion of the swing separator 19 is lifted up to secure a space for taking out the tool 92 below the swing separator 19, and the tool 92 is taken out of the threshing device 8 through the space for taking out and the opening 96. When the tool 92 is removed, the swing classification device 19 is lifted, and the swing classification device 19 is brought into the assembled state shown in fig. 2.

[ other embodiments ]

(1) In the above embodiment, the example in which the tilting members 68f and 68r are provided, but not limited to, are provided. The crawler belt may be provided with a tilting member that tilts only backward and downward or a tilting member that tilts only backward and upward depending on the splash of soil or the position of the lower cover portion relative to the rear end portion of the crawler belt. The inclination of the inclination member may be at any angle.

(2) In the above embodiment, an example in which the rear lower cover 63 is divided into two inclined member groups is shown. The present invention is not limited thereto. For example, the number of the components may be single or three or more.

(3) In the above embodiment, the example in which the lower cover portion 60 is divided into the front lower cover portion 61, the middle lower cover portion 62, and the rear lower cover portion 63 has been shown, but the present invention is not limited thereto. The number of the elements may be single or may be divided into two or four or more.

(4) In the above embodiment, the power transmission device 27 is provided on the lateral left side of the threshing device 8, but may be provided on the lateral right side of the threshing device 8.

(5) In the above embodiment, the example in which the side cover 50 is divided into four covers has been shown, but the present invention is not limited to this, and may be a single member that is not divided. It is also possible to divide the liquid into three or less or five or more.

(6) In the above embodiment, the example in which the lower cover 50B is divided into two covers has been shown, but the present invention is not limited to this, and may be a single member that is not divided. Further, the number of the segments may be three or more.

(7) In the above embodiment, the example in which the upper portions of the adjacent inclined members are connected in a mountain shape has been shown, but the connection may be omitted.

(8) In the above embodiment, the example in which the tilting member 68 is cantilever-supported has been shown, but the present invention is not limited to this, and a structure supported in a double-arm support may be adopted.

(9) In the above embodiment, the example in which the inclined member 68 is detachably supported has been shown, but a structure in which it is not detachably supported by one of the threshing device and the side cover may be adopted.

Industrial applicability

The invention can be applied to a common combine besides a semi-feeding combine.

< embodiment 2>

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[ integral structure ]

As shown in fig. 15 and 16, the following semi-feeding combine harvester is constituted: the harvesting unit 3 is provided at the front part of the traveling body 2 by the pair of right and left crawler traveling devices 1, the driving unit 4 is disposed at the right side of the front part of the traveling body 2, the threshing device 5 is provided at the left side of the traveling body 2, and the grain box 6 is provided at the right side of the traveling body 2 parallel to the threshing device 5.

The combine includes a driver's seat 4a in a driver's seat 4, a joystick, an instrument panel, and the like in the vicinity of the driver's seat 4a, and a driver's cabin 7 in a position covering them. An engine 8 is disposed below the driving unit 4.

The harvesting unit 3 includes a seedling dividing tool 10 for dividing the roots of the plant stalks, a plurality of lifting devices 11 for lifting the plant stalks after seedling dividing to a longitudinal posture, a pusher-type harvesting device 12 for cutting the roots of the plant stalks after lifting, a conveying device 13 for conveying the harvested stalks rearward while gradually changing the posture from the longitudinal posture to a horizontal posture and supplying the harvested stalks to the threshing device 5, and the like.

The threshing device 5 includes a grain lifting conveyor 14 for conveying grains selected by the lower swing sorting unit upward and supplying the grains to the grain box 6. The grain box 6 is provided with a grain discharge device 15 for discharging grains stored in the grain box 6 to the outside of the machine.

A feed chain 17 for feeding the harvested stalks to a threshing chamber (not shown) and a grip rail 18 provided above the threshing device 5 so as to face each other are provided on the left side of the threshing device. The feeding chain 17 is supplied with the harvested stalks from the conveyor 13 of the harvesting unit 3, and can feed the spike tips to the threshing chamber while sandwiching the roots of the harvested stalks, and threshing the stalks with the threshing cylinder in the threshing chamber.

As shown in fig. 15 to 18, the feed chain 17 is wound around a drive sprocket 21 provided in the drive housing 20 at the rear end portion of the conveyance path, and the feed chain 17 is driven by the driving force of the drive sprocket 21. The drive housing 20 incorporates therein a clutch mechanism FC that stops driving by shutting off transmission of driving force of the driving sprocket 21 when stopping the feeding chain 17 at an arbitrary timing and when stopping the feeding chain 17 in conjunction with the rising of the harvesting unit 3.

As shown in fig. 17 and 18, the traveling machine body 2 includes a clutch operation unit a (an example of an operation unit) that performs an on-off operation of the clutch mechanism FC by a driving force of the electric motor 34, and the traveling machine body 2 includes an operation wire W (an example of an interlocking mechanism) that transmits an operation force of the clutch operation unit a (the operation unit) to the clutch mechanism FC. These are described in detail below.

[ drive housing ]

As shown in fig. 17 and 18, the drive housing 20 includes the drive sprocket 21 and an input pulley 22, and the driving force from the threshing device 5 is transmitted to the input pulley 22 via a belt. A gear transmission mechanism 25 is provided between an output shaft 23 that rotates integrally with the drive sprocket 21 and an input shaft 24 that rotates integrally with the input pulley 22.

The output shaft 23 is provided with a shift member 26 that is spline-fitted so as to be movable along the axis of the output shaft 23, inside the drive housing 20. In the gear transmission mechanism 25, a drive gear 25a (an example of a transmission member) is idle-supported with respect to the output shaft 23. A plurality of engagement claws 26T are formed in the displacement member 26 in the circumferential direction, and a plurality of engaged claws 25T capable of engaging with the engagement claws 26T are formed on a surface of the drive gear 25a facing the displacement member 26.

In this way, the clutch mechanism FC (an example of a clutch mechanism) is configured by the shift member 26 having the plurality of engagement claws 26T and the drive gear 25a having the plurality of engaged claws 25T. A shifter 27 for shifting the shift member 26 is provided inside the drive housing 20, and a clutch lever 28 for operating the shifter 27 is provided outside the drive housing 20. A clutch lever 28 is connected to a shifter shaft 27a that swingably supports the shifter 27, and the shifter 27 swings in association with the rotation of the shifter shaft 27a by swinging the clutch lever 28, thereby turning on and off the clutch mechanism FC.

In this clutch mechanism FC, the shift member 26 is set to the transmission position shown in fig. 17, the clutch mechanism FC is maintained in the on state, and the shift member 26 is set to the off position shown in fig. 18, so that the clutch mechanism FC is maintained in the off state.

In particular, the first spring S1 for biasing the displacement member 26 toward the transmission position is provided inside the drive housing 20, and the second spring S2 for biasing the clutch lever 28 in the direction for moving the displacement member 26 toward the transmission position is provided outside the drive housing 20. The first spring S1 and the second spring S2 constitute a biasing member.

The operation wire W is composed of an outer tube Wa and an inner wire Wb, and the inner wire Wb is connected to the clutch lever 28. Thus, in a state where the inner wire Wb is relaxed, the shift member 26 is held in the transmission position by the biasing forces of the first spring S1 and the second spring S2, and the clutch mechanism FC is held in the on state. In contrast, in a state where tension is applied to the inner wire Wb, the shift member 26 is operated to the off position against the biasing force of the first spring S1 and the second spring S2, and the clutch mechanism FC is in the off state.

[ Clutch operating Unit ]

As shown in fig. 15 and 16, the clutch operation unit a is disposed on the right side surface of the threshing device 5 at the lower portion of the threshing device 5. As shown in fig. 17 and 18, the clutch operation unit a includes a cylindrical drive shaft 33 rotatably fitted on a fixed shaft 32 fixed to a unit case 31, and a motor 34 for driving the drive shaft 33 to rotate. The motor 34 is supported by the unit case 31, and a potentiometer (not shown) for measuring the rotation angle of the drive shaft 33 is provided in the unit case 31.

As shown in fig. 17 and 18, a plate-like cam body 35 is provided on the drive shaft 33. A support shaft 36 fixed in a parallel posture to the fixed shaft 32 is provided in the unit case 31, a cylindrical operating shaft 37 rotatably fitted in the support shaft 36 is provided in the support shaft 36, an arm 38 is provided in the operating shaft 37, and a roller-shaped cam follower 39 is rotatably provided at a swinging end of the arm 38 around a shaft 39 a.

The operating arm 41 and the release arm 42 are provided on the operating shaft 37, and they swing integrally with the arm body 38. The outer tube Wa of the operation wire W is fixed to the unit case 31 by a bracket 40. The inner wire Wb of the operation wire W is connected to the operation arm 41.

In this clutch operation unit a, the cam follower 39 is configured to be able to contact with the cam surface 35a of the cam body 35. In order to determine the swing limit of the clutch mechanism FC on the operation arm 41, the arm body 38, and the release arm 42, the unit case 31 includes a stopper 43 that abuts against the release arm 42, and the cam body 35 is provided with a release pin 44 that contacts the swing end of the release arm 42.

A pair of engagement portions 42a are formed at the base end portion of the release arm 42, and as shown in fig. 19, each engagement portion 42a engages with each ball 46 of a corresponding pair of restriction portions R (an example of a speed increasing mechanism) when in the posture shown in fig. 19. Note that the engagement portion 42a that engages with the balls 46 of the restriction portion R (speed increasing mechanism) may be formed in the arm 38.

That is, the unit case 31 is provided with a pair of restraining portions R that restrain the swing of the arm body 38 by a pair of engaging portions 42a that engage with the base ends of the release arms 42 when the clutch mechanism FC is operated to the off state by the driving force of the motor 34. As shown in fig. 21, the restraining portion R includes a ball 46 protruding under the urging force of the spring 45 and a ball guide 47 for determining the protruding limit of the ball 46.

[ mode of action ]

In this clutch operation unit a, in a state where the clutch mechanism FC is in an off state, as shown in fig. 17, the cam surface 35a of the cam body 35 is separated from the cam follower 39. In this state, the arm 42 is released from contact with the stopper 43 by the urging forces of the first spring S1 and the second spring S2, and the arm body 38 is held at the swing limit.

The combine harvester is provided with a control device (not shown) for controlling the motor 34, and the rotational posture of the drive shaft 33 is detected by a potentiometer and fed back to the control device. After the clutch mechanism FC reaches the on state by the reverse rotation of the motor 34, control is performed to stop the motor 34 at the timing when the cam body 35 reaches the posture shown in fig. 17.

As shown in fig. 17, when the clutch mechanism FC is in the on state, and the clutch mechanism FC is in the off state, the motor 34 rotates in the normal direction, and the drive shaft 33 rotates in the clockwise direction in the drawing, and the cam follower 39 is displaced in a state of abutting against the cam surface 35a of the cam body 35. As shown in fig. 18, the operation arm 41 swings about the operation shaft 37 in response to this displacement, and the displacement member 26 is operated to the cutting position in response to an increase in tension by performing a pulling operation on the inner wire Wb of the operation wire W.

When the clutch mechanism FC is operated to the off state as described above, the arm body 38 swings to the posture shown in fig. 18, and the pair of engagement portions 42a of the arm 42 are disengaged from the balls 46 of the corresponding restraining portion R, and in this engaged state, the motor 34 is stopped. In this state, the cam follower 39 is held in contact with the cam surface 35a of the cam body 35.

When the clutch mechanism FC is operated to the on state, the motor 34 is controlled to be reversed, and the drive shaft 33 starts to rotate counterclockwise. With this rotation, the cam body 35 starts to rotate, but since the pair of engagement portions 42a of the release arm 42 engage with the balls 46 of the corresponding restriction portion R, the state in which the inner wire Wb is pulled is maintained, and the clutch mechanism FC is maintained in the off state, even if the cam follower 39 is separated from the cam surface 35a as shown in fig. 19.

As described above, the control of reversing the motor 34 is continued, and as shown in fig. 19 to 21, the release pin 44 formed in the cam body 35 is brought into contact with the swing end of the release arm 42, and the release arm 42 is forcibly swung (the swing end is swung rightward in fig. 20), so that the engagement portion 42a of the corresponding release arm 42 is separated from the balls 46 of each of the pair of restriction portions R, and the restriction is released.

Further, as shown in fig. 21, since the restraining portion R includes the spring 45 and the ball 46, when the engagement of the engagement portion 42a is released, as shown in the drawing, the protruding portion of the engagement portion 42a moves the ball 46 in the press-in direction against the urging force of the spring 45, and the abutment of the ball 46 with the engagement portion 42a is released by this movement, whereby the free swinging of the operation arm 41, the arm body 38, and the release arm 42 is performed.

After the restraint is released in this way, control is performed to stop the motor 34 at the timing when the cam body 35 reaches the posture shown in fig. 17.

In particular, when the restraint is released, the engagement portion 42a is separated from the ball 46, and therefore the arm 38 swings at a high speed by the tension acting on the inner wire Wb, and the displacement member 26 moves at a high speed under the urging force of the first spring S1 and the second spring S2 in conjunction with the swing. Further, at the time of releasing the restraint, the amount by which the shift member 26 can be operated (the amount of movement in the direction in which the clutch mechanism FC can be operated) is a sufficient amount necessary to engage the engagement claw 26T of the shift member 26 with the engaged claw 25T of the drive gear 25a, so that the engagement failure does not occur, and the engagement claw 26T can be reliably engaged with the engaged claw 25T to operate the clutch mechanism FC in the on state.

That is, even if the motor 34 starts to rotate reversely, the clutch mechanism FC is maintained in the on state and the tension is applied to the operation wire W until the restraint of the restraint portion R is released. In this case, when the engagement of the pair of engagement portions 42a is released by the force applied from the release arm 42, the arm 38 provided on the support shaft 36 can swing freely at the time of release, and therefore, the arm 38 swings greatly at a high speed in a short time by the tension applied from the operation wire W. As a result, the engagement claw 26T is reliably engaged with the engaged claw 25T, and the clutch mechanism FC can be reliably operated in the on state.

[ other embodiments ]

The present invention may be configured as follows (the same reference numerals and signs as those of the embodiments are given to the portions having the same functions as those of the embodiments) in addition to the embodiments described above.

(a) The speed increasing mechanism is configured by a circuit of software, logic, or the like to set the driving mode of the motor 34 as follows: the motor 34 is driven at a predetermined speed when the motor 34 is rotated forward, and the driving speed of the motor 34 is increased when the motor 34 is rotated backward.

In this configuration, even without an additional mechanical movable structure or the like, the displacement speed of the cam follower 39 at the time of reversing the motor 34 can be increased as compared with that at the time of forward rotation of the motor 34, and a reliable on operation of the clutch mechanism FC can be achieved.

(b) The transmission path can be switched so that a different speed reduction device is selected and transmitted to the cam body 35 when the motor 34 rotates forward and backward, and the speed reduction ratio of the speed reduction device transmitting the driving force when the motor rotates backward is made smaller than the speed reduction ratio of the speed reduction device transmitting the driving force when the motor rotates forward.

In this configuration, for example, a reduction gear is configured by a gear change mechanism, and a one-way clutch, a ratchet, and the like can be combined as a configuration for switching a transmission path. With this configuration, the displacement speed of the cam follower 39 when the motor 34 rotates reversely can be increased compared with that when the motor 34 rotates normally, and the clutch mechanism FC can be reliably operated to be turned on.

(c) In the embodiment, the pair of restriction portions R is provided, but the restriction portions R may be one or three or more instead of this.

(d) In the embodiment, the restraint portion R for suppressing the swing of the arm body 38 is provided, and the restraint of the restraint portion R is released by the mechanical operation accompanied by the rotation of the drive shaft 33, but instead of this, the restraint portion R may be configured by a pin that is retractable by an electromagnetic solenoid, for example, and the restraint portion R may be configured to control the electromagnetic solenoid to release the restraint when the restraint is released.

In this configuration, the timing of releasing the restriction can be arbitrarily set, and the amount of increase in the displacement speed of the cam follower 39 can also be set.

(d) The clutch operating means a is configured to be capable of performing not only on-off operation of the clutch mechanism FC but also on-off operation of a threshing clutch that transmits driving force to the threshing device 5 or on-off operation of a clutch that transmits driving force to other devices by driving the drive shaft 33 to rotate by a single motor 34.

That is, the drive shaft 33 is provided with a cam member having the same structure as the cam body 35 except for the cam body 35 for controlling the clutch mechanism FC, and the other clutch is operated by the cam member. Accordingly, the plurality of clutch mechanisms are turned on in a predetermined sequence by the driving force when the single motor 34 is rotated in a predetermined direction, and the respective clutch mechanisms are turned off in an opposite sequence by the rotation in the opposite direction.

Industrial applicability

The present invention can be used in a combine harvester having a feed chain clutch.

< embodiment 3>

Note that, in the following description, regarding the traveling body of the combine, the direction of the arrow F shown in fig. 22 is referred to as "front body", the direction of the arrow B is referred to as "rear body", the direction of the arrow U is referred to as "upper body", the direction of the arrow D is referred to as "lower body", the direction of the front side of the paper surface of fig. 22 is referred to as "left body", and the direction of the back side of the paper surface is referred to as "right body".

[ regarding the entirety of the combine ]

As shown in fig. 22, the combine harvester includes a traveling body having a body frame 1 formed by connecting a plurality of bars such as square pipes, and a pair of right and left crawler traveling devices 2 provided at the lower portion of the body frame 1. At a lateral right portion of the front portion of the traveling machine body, a cab 4 having a cab 3 is formed. A harvesting conveyor 5 is provided at the front of the traveling machine body. The harvest transport unit 5 is supported at a lateral left side portion of the front portion of the traveling machine body in a state capable of swinging up and down between a lowered operation state and a raised non-operation state. The harvest transport section 5 includes a harvest section 5A provided at the front of the harvest transport section 5 and a transport section 5B provided at the rear of the harvest transport section 5. The harvesting unit 5A harvests plant roots of rice, wheat, etc. as crops, which are planted in a plurality of ridges of a field by the harvesting unit 6, while harvesting plant roots of the plant stalks by the push-type harvesting unit 7. The conveying section 5B conveys the harvesting stalks harvested by the harvesting section 5A rearward. A threshing device 8 and a grain box 9 are arranged at the rear part of the travelling machine body in parallel in the transverse direction. The threshing device 8 is located behind the conveyor 5B, and the grain box 9 is located behind the driver 4. The threshing device 8 includes a threshing feed chain 10 provided on the left and right sides of the threshing machine body, and the threshing feed chain 10 is used to pinch and convey the root side portion of the harvested stalks conveyed by the conveying unit 5B toward the rear of the threshing device 8, to insert the spike side portion of the harvested stalks into a threshing chamber (not shown) to perform threshing processing, and to perform sorting processing for sorting the fallen grains from dust such as straw chips. The shredding device 11 is configured to be connectable to the rear of the threshing device 8. A power transmission device (not shown) and a cross cover 12 are provided so as to extend across the lateral left side of the threshing device 8 and the lateral left side of the shredding device 11, the power transmission device (not shown) transmits power of an engine (not shown) to a sorting unit (not shown) of the threshing device 8 and the shredding device 11, and the cross cover 12 covers the power transmission device and the like from the lateral outside. The cross cap 12 is constituted by a plurality of divided cross caps. A threshing feeding chain 10 is provided at the rear of the threshing device 8 with a straw discharging conveyor 13 for feeding threshing straw discharged from the threshing chamber to the shredder 11, and a conveyor hood 13A for covering the conveying end side of the straw discharging conveyor 13. The grain box 9 supplies the exfoliated grains obtained by the threshing device 8 by the grain lifting device 14 and stores them. A grain discharging device 15 for discharging the dropped grains stored in the grain box 9 is extended from the rear portion of the grain box 9.

[ Structure for shredding device ]

As shown in fig. 22 and 23, the shredder 11 includes a shredder housing 20 positioned below the conveyance terminating end side portion of the straw conveying device 13, and a discharge housing 21 extending downward from the lower portion of the shredder housing 20. As shown in fig. 22 and 24, a rotary cutter 22 and a supply rotary body 23 are rotatably provided in the shredding case 20. The rotary cutter 22 and the supply rotary body 23 have rotary shafts 22a, 23a along the lateral width direction of the cutter housing 20, and are driven to rotate about the axial cores of the rotary shafts 22a, 23a as rotation centers.

As shown in fig. 23 and 24, the right lateral portion of the shredder housing 20 and the support portion 16 provided on the machine body side are connected via hinge mechanisms 30 provided at two upper and lower positions of the shredder housing 20. The support portion 16 is constituted by a pillar erected at the rear of the body frame 1. The shredder device 11 is supported by the support portion 16 so as to be swingable about a swing axis P in the vertical direction of the machine body provided in the vertical hinge mechanism 30 between a closed state in which the shredder housing 20 is along the rear wall 8a of the threshing device 8 as shown by a solid line in fig. 23 and an open state in which the shredder housing 20 is separated from the rear wall 8a in the lateral direction of the machine body as shown by a two-dot chain line in fig. 23. When the shredder 11 is turned off, the shredder 11 can be fixed to the off state by a lock mechanism (not shown) provided across the lateral left portion of the shredder housing 20 and the threshing machine body of the threshing device 8. In the present embodiment, the support portion 16 is constituted by a stay standing on the body frame 1, but the present invention is not limited thereto. For example, the threshing device 8 can be used as the supporting portion 16.

In the shredder 11, when the shredder 11 is turned off, the shredder housing 20 is connected to the straw conveyor 13, so that the threshed and discharged straw from the threshing device 8 can be shredded.

Specifically, when the shredder 11 is closed, the straw-discharging inlet opened upward in the upper portion of the shredder housing 20 is positioned below the conveyance-stopping end of the straw conveyance device 13. When the swing cover 24 (see fig. 23 and 24) of the straw feeding port is opened, the threshing straw fed from the straw feeding device 13 falls down to the straw feeding port and is received in the shredding case 20. The received threshing bars are fed between the feeding rotator 23 and the rotary cutter 22 by rotation of the feeding rotator 23 and the rotary cutter 22. The supplied threshing and discharging stalks are cut in the stalk direction by a rotary blade 22b (see fig. 24) arranged in the direction of the return axis of the rotary blade 22. The cut-off chopped straw falls from the chopping housing 20 into the interior of the discharge housing 21 and is discharged from the discharge housing 21 to the field.

In the shredder 11, the shredder 11 is opened, so that the inspection opening opened in the rear wall 8a of the threshing device 8 is opened, thereby enabling inspection and cleaning in the threshing device. The threshing device 8 can be taken out of a swing separator (not shown).

[ Structure for hinge mechanism ]

As shown in fig. 24, 25, and 26, the upper hinge mechanism 30U on the upper side and the lower hinge mechanism 30D on the lower side each include a support shaft 32 provided in the support portion 16 and having a swing axis P in the machine body vertical direction, and a coupling member 33 provided in the shredder housing 20 in a state of being fitted in the support shaft 32. The support shaft 32 is supported by the shaft support members 31a of the support arm 31 extending from the support portion 16 at two upper and lower positions provided at the tip portion, and is supported by the support portion 16. The coupling member 33 is supported by the mounting rod 20a extending from the shredder housing 20, and is provided in the shredder housing 20. In the present embodiment, the connecting members 33 of the upper hinge mechanism 30U and the lower hinge mechanism 30D are formed of plate-like members, but the present invention is not limited thereto. For example, a block-shaped member, a box-shaped member formed by combining plate members, or the like may be used.

As shown in fig. 25, a hole 33a is formed in each of the coupling members 33 of the upper hinge mechanism 30U and the lower hinge mechanism 30D to detachably and rotatably fit the coupling member 33 to the support shaft 32 from above. In the upper hinge mechanism 30U, the coupling member 33 is configured to be in contact with the upper shaft support member 31a, and the coupling member 33 is received and supported by the shaft support member 31a from below. In the lower hinge mechanism 30D, the coupling member 33 is separated from the upper shaft support member 31a, and a gap S is formed between the coupling member 33 and the upper shaft support member 31 a.

[ Structure for anti-drop mechanism ]

As shown in fig. 24 and 25, the upper hinge mechanism 30U includes a drop prevention mechanism 40 for preventing the shredder 11 from dropping out.

As shown in fig. 25, the drop prevention mechanism 40 includes a cylindrical member 41 fitted in a portion of the support shaft 32 protruding upward from the coupling member 33, a flange member 42 attached to a distal end portion of the support shaft 32 protruding upward from the cylindrical member 41, and a bolt 43 fastened to a distal end portion of the support shaft 32 protruding upward from the flange member 42.

The tubular member 41 is configured to have a portion protruding toward the outer peripheral side than the outer diameter of the hole portion 33a of the coupling member 33. Specifically, the tubular member 41 is formed of a cylindrical member having an outer diameter larger than that of the hole portion 33 a. The tubular member 41 is fitted in a portion of the support shaft 32 protruding from the hole 33a in the insertion direction into which the coupling member 33 is inserted. The flange member 42 is configured to have a portion protruding toward the outer peripheral side than the outer diameter of the hole portion 33a of the coupling member 33. Specifically, the flange member 42 is constituted by a disk member having an outer diameter larger than that of the hole portion 33 a. The flange member 42 is attached to a distal end portion of the support shaft 32, which projects from the tubular member 41 in an insertion direction into which the coupling member 33 is inserted. The bolt 43 is fastened to the support shaft 32 in a direction in which the support shaft 32 is inserted into the hole 33a, and the bolt 43 is fastened to the support shaft 32, whereby the flange member 42 is pressed from above by the head of the bolt 43, the flange member 42 is attached to the support shaft 32, and the tube member 41 is abutted against the outer periphery of the hole 33a of the coupling member 33. The flange member 42 can be detached from the support shaft 32 by detaching the bolt 43 from the support shaft 32, and the tube member 41 can be detached upward from the support shaft 32. In the present embodiment, a cylindrical member is used as the cylindrical member 41, but the present invention is not limited thereto. For example, a non-circular cylindrical member such as a hexagon or a quadrangle may be used. In the present embodiment, the flange member 42 is a disk member, but the present invention is not limited thereto. For example, a non-circular member such as a hexagon, a quadrangle, or a triangle may be used. In addition, a block-shaped member may be used in addition to the plate-shaped member.

In the anti-disengaging mechanism 40, the attachment tube member 41, the flange member 42, and the bolts 43 are in an operating state in which the shredder 11 is prevented from being disengaged from the support 16.

That is, when the cylindrical member 41, the flange member 42, and the bolt 43 are attached, the flange member 42 is pressed against the cylindrical member 41 by the tightening force of the bolt 43, and the cylindrical member 41 abuts against the coupling member 33, so that even if the support shaft 32 is to be pulled out from the hole portion 33a, that is, the coupling member 33 is to be pulled out from the support shaft 32, the flange member 42 serves as a stopper, preventing the support shaft 32 from being pulled out from the hole portion 33a (the coupling member 33 is pulled out from the support shaft 32) and the shredder 11 from being separated upward from the support portion 16.

In the drop prevention mechanism 40, the flange member 42 and the bolts 43 are removed, and the shredder 11 is released from the support portion 16.

That is, when the flange member 42 and the bolt 43 are removed, there is no longer a stopper for the support shaft 32 to be pulled out of the hole 33a, and the tubular member 41 can be pulled out of the support shaft 32, allowing the support shaft 32 to be pulled out of the hole 33a and the shredder 11 to be separated upward from the support portion 16.

When the shredder 11 is mounted, the coupling members 33 of the upper hinge mechanism 30U and the lower hinge mechanism 30D are fitted into the support shaft 32 from above. In the upper hinge mechanism 30U, if the coupling member 33 is in contact with the upper shaft support member 31a and the coupling member 33 is supported by the shaft support member 31a from below, the coupling member 33 is separated from the upper shaft support member 31a in the lower hinge mechanism 30D without being in contact with the coupling member 33, but since the coupling member 33 of the upper hinge mechanism 30U is supported by the shaft support member 31a from below, the shredder 11 is supported by the support portion 16 from below and is supported in a state capable of swinging and opening about the axis P, and the shredder 11 can be mounted.

In the case of attaching the shredder device 11, even if an assembly error of the upper hinge mechanism 30U and the lower hinge mechanism 30D occurs due to the manufacturing accuracy of the upper hinge mechanism 30U and the lower hinge mechanism 30D, the assembly error can be absorbed by the gap S between the coupling member 33 of the lower hinge mechanism 30D and the shaft support member 31a, and the shredder device 11 can be supported by the support portion 16 in a state free from assembly failure.

When the shredder 11 is mounted, the tube member 41, the flange member 42, and the bolts 43 are mounted to switch the retaining mechanism 40 to the active state. Accordingly, the escape prevention mechanism 40 prevents the coupling member 33 of the upper hinge mechanism 30U from being extracted from the support shaft 32, and the extraction of the coupling member 33 of the upper hinge mechanism 30U from the support shaft 32 prevents the extraction of the coupling member 33 of the lower hinge mechanism 30D from the support shaft 32, so that the shredder 11 can be prevented from being separated from the support portion 16 even when an operating force for raising the shredder 11 is generated, for example, when the lower portion of the shredder 11 collides with a ridge due to the retraction of the traveling machine body. In the upper hinge mechanism 30U, the tube member 41 has a function of being provided on a boss portion of the coupling member 33 so as to fit the coupling member 33 into the support shaft 32, and rattling and tilting between the coupling member 33 and the support shaft 32 are less likely to occur.

When the shredder 11 is detached, the flange member 42 and the bolts 43 are detached, and the release preventing mechanism 40 is switched to the operation released state. When the release preventing mechanism 40 is in the operation released state, the shredder device 11 is released by lifting the shredder device 11, the coupling member 33 of the upper hinge mechanism 30U is separated upward from the support shaft 32, and the coupling member 33 of the lower hinge mechanism 30D is separated upward from the support shaft 32, so that the shredder device 11 is separated upward from the support portion 16, and the shredder device 11 can be detached.

[ other embodiments ]

(1) Fig. 27 is a side view showing a support structure provided with the shredder apparatus 11 according to another embodiment. In the support structure according to the other embodiment, the lower hinge mechanism 30D out of the upper hinge mechanism 30U and the lower hinge mechanism 30D includes the drop-off preventing mechanism 40. In the anti-slip mechanism 40, the tube member 41 is fixed to the coupling member 33. In the present embodiment, the fixing of the tube member 41 to the coupling member 33 is performed by welding. The present invention is not limited thereto, and a fixing means may be employed in which the tubular member 41 includes a flange portion and the tubular member 41 is fixed to the coupling member 33 by the flange portion and a coupling bolt for coupling the flange portion to the coupling member 33. In each of the upper hinge mechanism 30U and the lower hinge mechanism 30D, the shaft support member 31a contacts the coupling member 33, and the coupling member 33 is supported from below by the shaft support member 31a, so that the shredder 11 is supported from below by the support portion 16.

(2) In the above embodiment, the support shaft 32 is provided in the support portion 16, the coupling member 33 is provided in the shredder 11, and the shredder 11 is separated from the support portion 16 by pulling the coupling member 33 upward with respect to the support shaft 32, but the present invention is not limited thereto. That is, the support shaft may be provided to the shredder 11, the coupling member 33 may be provided to the support portion 16, and the shredder 11 may be separated from the support portion 16 by pulling the support shaft 32 upward from the coupling member 33. In short, the supporting shaft is inserted into the hole of the coupling member to support the shredder device 11 on the support portion 16, and the supporting shaft is pulled out from the hole of the coupling member to separate the shredder device 11 upward from the support portion 16.

(3) In the above embodiment, the example was shown in which the upper hinge mechanism 30U has the center shaft support member 31a in contact with the coupling member 33 and the lower hinge mechanism 30D has the center shaft support member 31a separated from the coupling member 33, but the upper hinge mechanism 30U may have the center shaft support member 31a separated from the coupling member 33 and the lower hinge mechanism 30D may have the center shaft support member 31a in contact with the coupling member 33.

(4) In the above embodiment, the support portion 16 is constituted by the stay, but the present invention is not limited to this, and the threshing device 8 may be used as the support portion 16.

(5) In the above embodiment, the example of the structure in which the shredder 11 is opened to the right side of the machine body has been shown, but may be opened to the left side of the machine body.

(6) In the above embodiment, the example in which the tubular member 41 is provided has been shown, but the present invention is not limited to this, and a structure in which the flange member 42 is in direct contact with the coupling member 33 without providing the tubular member 41 may be adopted.

(7) In the above embodiment, the threshing device 8 is shown as a half-feed type, but a threshing device in which the whole of the harvested crop from the plant root to the spike tip is supplied to the threshing chamber may be used.

Industrial applicability

The present invention is not limited to the half-feed combine harvester, and can be applied to a full-feed combine harvester.

Claims

1. A combine harvester is characterized by comprising:

a crawler travel device supporting the machine body frame;

a harvesting part for harvesting the plant-standing cereal stalks in the field;

a threshing device which is supported by the machine body frame and performs threshing treatment on the harvested cereal stalks;

the power transmission device is arranged at the lateral outer side of the threshing device body and transmits the power of a power source to the threshing device;

a side cover portion provided on a lateral outer side of the power transmission device and covering the power transmission device from the lateral outer side of the power transmission device; and

A lower cover portion provided between a lower end portion of the side cover portion and a lower end portion of the threshing device in a machine body front-rear direction, and covering a gap between the lower end portion of the side cover portion and the lower end portion of the threshing device;

the lower cover portion includes a plurality of inclined members provided in a state inclined in a side view of the machine body and spaced apart in a front-rear direction of the machine body, at a portion located above a rear end side portion of the crawler belt, the inclined members allowing dust to fall downward from a gap between the side cover portion and the threshing device and blocking mud splashed by the crawler belt,

the plurality of tilting members include a plurality of tilting members positioned on a front side with respect to a rear end portion of the crawler belt.

2. A combine harvester according to claim 1, characterized in that,

the tilting member is tilted so as to be oriented in a direction intersecting with a soil splashing direction of the crawler belt.

3. A combine harvester according to claim 1, characterized in that,

the front side tilting member of the plurality of tilting members tilts in a state of tilting backward and upward, and the rear side tilting member of the plurality of tilting members tilts in a state of tilting backward and downward.

4. A combine harvester according to claim 2, characterized in that,

5. A combine harvester according to any one of claims 1 to 4, characterized in that,

the plurality of tilting members are tilted in a state of being tilted rearward and upward with respect to a rear end portion of the crawler belt running device, and the plurality of tilting members are tilted in a state of being tilted rearward and downward with respect to a rear end portion of the crawler belt running device.

6. A combine harvester according to claim 5, characterized in that,

the upper ends of the incline members adjacent to each other at a position immediately above the rear end of the crawler belt travel device are connected in a mountain shape.

7. A combine harvester according to any one of claims 1 to 4, characterized in that,

the inclined member protrudes in a cantilever shape from a side wall of the threshing device toward the lateral outside.

8. A combine harvester according to any one of claims 1 to 4, characterized in that,

The tilting member is detachably supported.

9. A combine harvester according to any one of claims 1 to 4, characterized in that,

and a guide member provided at a position higher than the inclined member for guiding dust in a gap between the side cover and the threshing device to the rear lower side.

10. A combine harvester according to any one of claims 1 to 4, characterized in that,

the lower cover portion includes a support member that engages with the side cover portion to support the side cover portion.