JP7126353B2 - combine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester provided with an operating state switching device for switching operating states of a plurality of operating devices at appropriate timings.

As the combine as described above, for example, a combine disclosed in Patent Document 1 is known. Patent Document 1 discloses a combine harvester provided with an operating state switching device (“clutch operating device [A]” in the document) that switches the operating states of a plurality of operating devices at appropriate timings.

In the operating state switching device of Patent Document 1, there is provided a device that is capable of swinging around a first swing axis (in the document, "the axis of the pivot shaft [78]") and in the direction of the first swing axis. A plurality of arms ("cam follower [85] etc. in the literature) provided in a row and a second swing axis ("the axis of the pivot shaft [77]" in the literature) are swingable together. A plurality of arms (such as cam followers [84] in the literature) provided in a row in the direction of the second swing axis, and the same rotation axis parallel to the first and second swing axes (in the literature "the axis of the cam shaft [80]") and a plurality of cams arranged side by side in the direction of the rotation axis (in the literature, "first to third cam plates [81], [82], [83]”), a drive actuator (“electric motor [70]” in the document) for rotating a plurality of cams, and an arm on the side of the first swing axis and the actuator, and the first A plurality of cable wires extending from each of the arms on the swing axis side ("manipulation wires [40a], etc." in the literature) are linked to the second arm on the swing axis side and the actuator. A plurality of cable wires (“manipulation wire [5a], etc.” in the literature) extending from each of the two swing axis side arms are provided.

JP 2009-268365 A

The operating state switching device of Patent Document 1 includes a plurality of arms on the side of the first swing axis and a plurality of arms on the side of the second swing axis. A cable wire extends from each of the plurality of arms on the side and a cable wire extends from each of the plurality of arms on the second swing axis side. For this reason, the number of parts constituting the operating state switching device increases. Moreover, the plurality of cable wires on the side of the first swing axis and the plurality of cable wires on the side of the second swing axis are tangled.

In view of the above situation, there is a demand for a combine harvester in which the operating state switching device can be simply configured.

A feature of the present invention is
A combine having an operating state switching device that switches the operating states of a plurality of operating devices at appropriate timing,
The operating state switching device includes a plurality of arms that are swingable around the same swing axis and are arranged in the direction of the swing axis, and a plurality of arms that rotate in the same direction parallel to the swing axis. a plurality of cams rotatable about an axis and arranged in a row in the direction of the rotation axis so as to correspond to each of the plurality of arms; a drive actuator that rotationally drives the plurality of cams; a plurality of cable wires linking each of the arms and each of the plurality of actuators and extending in the same direction from each of the plurality of arms;
When the plurality of cams are rotationally driven by the drive actuator, each of the plurality of arms is swung to the same side about the swing axis by the action of the cam, and each of the plurality of arms swings to the same side. By pulling each of the plurality of cable wires, the operation states of the plurality of actuators are switched at appropriate timing, and the plurality of arms are configured to rotate the plurality of cams around the rotation axis. an arm that swings only when rotated to one side and pulls any one of the plurality of cable wires; and an arm that only swings to pull one of the plurality of cable wires, and that all of the plurality of arms swing in the same direction about the swing axis. to pull the cable wire.

According to this characteristic configuration, the plurality of arms can swing about the same swing axis, and the plurality of arms swing to the same side about the swing axis by the action of the cam. For this reason, for example, compared to a configuration including a plurality of arms that can swing about a first swing axis and a plurality of arms that can swing about a second swing axis, the operation state can be switched. The number of parts constituting the device is reduced. In addition, since the plurality of cable wires extend in the same direction from each of the plurality of arms, the plurality of cable wires can be easily arranged without being complicated. That is, according to this characteristic configuration, it is possible to realize a combine harvester in which the operating state switching device can be simply configured.

Furthermore, in the present invention,
The operating state switching device has a case that houses the plurality of arms and the plurality of cams,
the upper ends of the plurality of arms projecting upward from the case, and the cable wires are connected to the upper ends of the respective arms;
Preferably, the plurality of cable wires extends horizontally while passing over the cam.

According to this characteristic configuration, the plurality of cable wires are arranged in a concentrated manner above the cam, making it easier to arrange the plurality of cable wires without tangling them.

Furthermore, in the present invention,
It is preferable that a support portion for supporting the cable wire is provided on a side portion of the case opposite to the side where the arm is positioned with respect to the cam.

According to this characteristic configuration, the portion of the cable wire that is separated from the arm is supported by the supporting portion, so that the cable wire can be prevented from loosening.

Furthermore, in the present invention,
the case has a bottom portion and side walls that cover the plurality of arms and the plurality of cams from the front, rear, left and right, and is open upward;
It is preferable that an upper lid is provided for opening and closing a portion of the case that opens upward.

According to this characteristic configuration, it is possible to prevent external dust from entering the inside of the case through the upwardly opening portion of the case. Also, by removing the upper cover, cleaning of the inside of the case can be easily performed.

Furthermore, in the present invention,
A cleaning opening is formed in a portion of the bottom portion opposite to the side where the arm is positioned with respect to the cam,
It is preferable that a bottom lid for opening and closing the cleaning port is provided.

According to this characteristic configuration, dust inside the case can be easily discharged to the outside through the cleaning port by removing the bottom cover. In addition, the arm is less likely to get in the way when dust is discharged to the outside from the cleaning opening.

Furthermore, in the present invention,
a support shaft supporting the plurality of arms so as to be able to swing about the swing axis is provided across wall portions of the side walls that face each other in the swing axis direction;
It is preferable that, among the plurality of arms, an arm that exerts a greater force when pulling the cable wire is supported by a portion of the support shaft closer to the wall.

According to this characteristic configuration, even if a large force acts on the arm when the cable wire is pulled, the arm is supported by a portion (base side) of the support shaft near the wall, so the support shaft is deformed. becomes difficult.

Furthermore, in the present invention,
It is preferable that a relay for the drive actuator is supported on a wall portion of the side wall on the side in the extending direction of the cable wire.

According to this characteristic configuration, the side wall can be used as a member that supports the relay. Further, when the drive actuator is supported on the wall portion of the side wall in the rotation axis direction, the relay is less likely to interfere with the drive actuator.

Furthermore, in the present invention,
It is preferable that a control device for a device other than the operating state switching device is supported on a wall portion of the side wall that is different from the wall portion on which the relay is supported.

According to this characteristic configuration, the side wall can be used as a member that supports the control device. Moreover, it is convenient from the viewpoint of effectively utilizing a plurality of wall portions of the side walls.

Furthermore, in the present invention,
A rotation angle detection sensor that detects the rotation angle of the cam is provided,
The driving actuator is supported on one side wall portion of the side wall in the rotation axis direction, and the rotation angle detection sensor is supported on the other side wall portion of the side wall in the rotation axis direction. It is preferable that

According to this characteristic configuration, the side wall can be used as a member that supports the drive actuator and the rotation angle detection sensor. In addition, the drive actuator and the rotation angle detection sensor are positioned in the direction of the rotation axis, and the arrangement is suitable for rotation driving by the drive actuator and rotation angle detection by the angle detection sensor.

Furthermore, in the present invention,
It is preferable that an attachment portion for attaching the case to the airframe is provided on the outside of the case.

According to this characteristic configuration, the case is attached to the machine body outside the case, and the case can be easily attached to the machine body.

Furthermore, in the present invention,
a reaping part for reaping planted grain culms;
a threshing device for threshing harvested grain culms;
a grain storage tank for storing grains after threshing;
a grain discharging device for discharging grains in the grain storage tank;
The actuating devices include a reaping clutch that turns power transmission to the reaping unit on and off, a threshing clutch that turns power transmission to the threshing device on and off, and a grain that turns power transmission to the grain discharging device on and off. an ejection clutch;
Among the plurality of cams, the cam corresponding to the reaping clutch and the cam corresponding to the threshing clutch are rotationally driven to one side about the rotation axis, and among the plurality of cams, the grain discharge clutch is driven to rotate. The corresponding cam is preferably driven to rotate about said axis of rotation to the other side.

According to this characteristic configuration, the cam corresponding to the reaping clutch and the cam corresponding to the threshing clutch are rotationally driven to one side about the rotation axis, thereby simultaneously driving the reaping part and the threshing device. Convenient. Further, since the cam corresponding to the grain discharging clutch is rotationally driven to the other side about the rotation axis, it is convenient in terms of the work form in which the grain discharging device is driven separately from the reaping part and the threshing device.

Furthermore, in the present invention,
The operating state switching device has a case that houses the plurality of arms and the plurality of cams,
the case has a bottom portion and side walls that cover the plurality of arms and the plurality of cams from the front, rear, left and right;
a support shaft supporting the plurality of arms so as to be able to swing about the swing axis is provided across wall portions of the side walls that face each other in the swing axis direction;
In the plurality of arms, the arm corresponding to the reaping clutch and the arm corresponding to the threshing clutch among the plurality of arms are arranged such that the arm corresponding to the grain discharge clutch among the plurality of arms is connected to the swing shaft. It is preferable to be supported by the support shaft in a state of being sandwiched from both sides in the center direction.

Normally, the force acting on the arm corresponding to the reaping clutch when it pulls the cable wire and the force acting on the arm when the arm corresponding to the threshing clutch pulls the cable wire correspond to the grain discharging clutch. greater than the force acting on that arm when it pulls on the cable wire. According to this characteristic configuration, even if a large force acts on the arm corresponding to the reaping clutch or the arm corresponding to the threshing clutch when pulling the cable wire, these arms are attached to the portion of the support shaft near the wall ( (root side), the support shaft is less likely to deform.

It is a right view which shows an ordinary type combine. It is a top view which shows a normal type combine. It is left side sectional drawing which shows a threshing apparatus. It is a figure which shows the power transmission path of this combine. It is a left view which shows a driving cabin. Fig. 2 is a cross-sectional plan view showing an operating cabin; It is a rear sectional view showing a driving cabin and an engine room. It is a right side sectional view showing a driving cabin and an engine room. It is a left side cross-sectional view showing a clutch switching lever. FIG. 4 is a plan view showing a clutch switching lever; FIG. 4 is a rear cross-sectional view showing a clutch switching lever; FIG. 4 is a right side view showing a clutch switching device and a peripheral structure of the clutch switching device; FIG. 2 is a plan view showing a clutch switching device and a peripheral structure of the clutch switching device; FIG. 3 is a rear view showing a clutch switching device and a peripheral structure of the clutch switching device; It is an exploded perspective view showing a clutch switching device. It is a right side sectional view showing a clutch switching device. It is a plane sectional view showing a clutch switching device. FIG. 4 is a diagram showing a control block; It is a figure which shows the rotation position of a 1st, 2nd, 3rd cam. It is a figure which shows the corresponding relationship between the rotation position of a 1st, 2nd, 3rd cam, and the state of a reaping clutch, a grain discharge clutch, and a threshing clutch. It is a top view which shows the operation|movement part which concerns on another embodiment. It is a left view which shows the operation|movement part which concerns on another embodiment. It is a left side cross-sectional view showing a clutch switching lever according to another embodiment. It is a rear cross-sectional view showing a clutch switching lever according to another embodiment.

A mode for carrying out the present invention will be described based on the drawings. In the following description, the direction of arrow F is the "front side of the fuselage" (see FIGS. 1 and 2), the direction of arrow B is the "rear side of the fuselage" (see FIGS. 1 and 2), and the direction of arrow L is the " The left side of the machine body" (see Fig. 2), and the direction of the arrow R is the right side of the machine body" (see Fig. 2).

[Overall configuration of combine harvester]
1 and 2 show a conventional combine. The combine is provided with a body frame 1 and a crawler traveling device 2. - 特許庁A reaping part 3 for reaping planted grain culms is provided in front of the traveling machine body. The harvesting part 3 is provided with a raking reel 4 for raking planted grain culms, a cutting blade 5 for cutting planted grain culms, and a raking auger 6 for raking the harvested grain culms.

A driving cabin 7 is provided on the right side of the front part of the traveling machine body. The driving cabin 7 is provided with a driving section 8 on which a driver rides and a cabin 9 covering the driving section 8. - 特許庁
An engine room ER is provided below the operating section 8 . The engine room ER accommodates an engine E, an exhaust purification device 10, a cooling fan 11, and a radiator 12 (see FIG. 7). A threshing device 13 for threshing the harvested grain culms is provided behind the harvesting unit 3 . A feeder 14 for conveying harvested grain culms toward the threshing device 13 is provided across the reaping part 3 and the threshing device 13 . A grain storage tank 15 for storing grains after threshing is provided side by side with the threshing device 13 . The grain storage tank 15 is configured to be swingably openable and closable around an axis Z1 extending in the vertical direction across a working position and a maintenance position. A fuel tank 16 is provided between the rear part of the threshing device 13 and the rear part of the grain storage tank 15 .

A grain discharging device 17 is provided for discharging the grains in the grain storage tank 15 to the outside. The grain discharging device 17 includes a vertical conveying unit 18 that conveys the grains in the grain storage tank 15 upward, and a horizontal conveying unit 19 that conveys the grains from the vertical conveying unit 18 toward the outside of the machine body. and is provided. The grain discharging device 17 is configured to be rotatable around the axis Z1 of the vertical conveying section 18 .
A lower end portion of the vertical conveying portion 18 is connected to the bottom portion of the grain storage tank 15 for communication. The end portion of the horizontal transport portion 19 on the side of the vertical transport portion 18 is connected to the upper end portion of the vertical transport portion 18 and supported so as to be vertically swingable.

A transmission T for shifting power from the engine E is provided. The transmission T includes a hydraulic continuously variable transmission (HST) 20 as a main transmission and a transmission case 21 (see FIG. 4). The transmission case 21 accommodates a gear-type auxiliary transmission and the like.

[Threshing device]
As shown in FIG. 3, a threshing chamber 22 is formed in the upper portion of the threshing device 13 . In the handling chamber 22, a handling cylinder 23 is rotatably provided around a rotation axis Y1 extending in the longitudinal direction of the machine body. A receiving net 24 is provided below the handling cylinder 23 . Below the threshing device 13, there are a rocking sorting device 25 for rocking and sorting the objects to be sorted, a winnow 26 for blowing sorting air to the rocking sorting device 25, and the first grains (single-grained grains, etc.). ) are provided, and a second recovery section 28 is provided for recovering the second grains (grains with branch stems, etc.). The first collecting part 27 is provided with the first screw 29 for conveying the first grain to the right. The second recovery part 28 is provided with a second screw 30 for conveying the second grain to the right. The first screw 29 and the second screw 30 are spaced apart in the longitudinal direction of the machine body. The first screw 29 and the second screw 30 are detachable from the right side of the threshing device 13. With the grain storage tank 15 positioned at the maintenance position, the first screw 29 and the second screw 30 are removed. It can be pulled out from the right side of the threshing device 13 . On the right side of the threshing device 13, a vertical conveying device 31 that conveys the first grain from the first screw 29 upward toward the grain storage tank 15, and the second grain from the second screw 30. A second reducing device 32 is provided to return the grains to the front portion of the rocking sorting device 25 .

[Power transmission path]
As shown in FIG. 4, a travel transmission mechanism 34 is provided for transmitting the driving force of the engine E to the HST 20 via a transmission belt. After the driving force of the engine E is changed by the HST 20 and the auxiliary transmission, it is transmitted to the crawler traveling device 2 .

A grain discharge transmission mechanism 36 that transmits the driving force of the engine E to the grain discharge device 17 via a transmission belt 35 is provided. A grain discharge clutch 37 is provided for turning power transmission to the grain discharge device 17 by the grain discharge transmission mechanism 36 on and off. Grain discharge clutch 37 is constituted by a belt tension clutch.

A threshing transmission mechanism 39 that transmits the driving force of the engine E to the winnow 26 via a transmission belt 38 is provided. A threshing clutch 40 is provided for turning on and off power transmission to the winnow 26 by the threshing transmission mechanism 39 . The threshing clutch 40 is composed of a belt tension clutch.

A belt transmission mechanism 41 is provided for transmitting the power of the winnow 26 to the first screw 29 and the second screw 30 . A bevel gear transmission mechanism 42 is provided for transmitting the power of the first screw 29 to the vertical conveying device 31 . A chain transmission mechanism 43 and a bevel gear transmission mechanism 44 for transmitting the power of the second screw 30 to the second reducing device 32 are provided.

A belt transmission mechanism 46 is provided for transmitting the power of the winnow 26 to the relay shaft 45 . A bevel gear transmission mechanism 48 is provided for transmitting the power of the relay shaft 45 to the handling cylinder 23 and the relay shaft 47 . A reaping transmission mechanism 50 is provided for transmitting the power of the relay shaft 45 to the feeder 14 via the transmission belt 49 . A reaping clutch 51 is provided for turning on and off power transmission to the feeder 14 by the reaping transmission mechanism 50 . The reaping clutch 51 is composed of a belt tension clutch.

[Driving cabin]
As shown in FIGS. 5 to 8 , the cabin 9 includes a roof portion 52 , a windshield 53 , a side glass 54 , a rear glass 55 , and an entry door 56 . The driving section 8 includes a driver's seat 57 , a front panel 58 , a side panel 59 and a grain discharge operation section 60 . A steering lever 61 and a meter panel 62 are provided on the front panel 58 . The steering lever 61 performs operations such as steering operation of the traveling machine body and raising/lowering operation of the reaping unit 3 .

A front cover 63 is provided on the front portion of the driving section 8 . A front strut 64 is provided on the front portion of the left side of the driving portion 8 . A rear strut 65 is provided at the rear portion of the left side of the driving portion 8 . A lower frame 66 extending in the longitudinal direction of the fuselage is provided across the front strut 64 and the rear strut 65 . A front end portion of the lower frame 66 is supported by the front struts 64 , and a rear end portion of the lower frame 66 is supported by the rear struts 65 . The lower frame 66 is positioned below the exhaust purification device 10 .

The grain discharge operation unit 60 is provided on the rear right side of the driver's seat 57 . The grain discharge operation unit 60 includes a clutch switching operation unit for switching the grain discharge clutch 37 between an on state and a disengagement state, a turning operation unit for turning the grain discharge device 17, and a grain discharge device 17 ( A lifting operation section is provided for lifting and lowering the horizontal conveying section 19).

[Exhaust purification device]
The exhaust purification device 10 purifies the exhaust of the engine E with a DPF (diesel particulate filter). The exhaust emission control device 10 is provided below the side panel 59 and above the engine E in a posture in which the longitudinal direction thereof extends along the longitudinal direction of the aircraft body. The exhaust purification device 10 is provided below the side panel 59 so as to protrude leftward from the left end 59 a of the side panel 59 . The exhaust gas purification device 10 is covered from above by a top plate 67 as a whole as well as the projecting portion of the exhaust gas purification device 10 . The exhaust purification device 10 is mounted and supported on the upper part of the engine E. As shown in FIG. The exhaust purification device 10 is connected to the engine E via stays 68 on the front and rear sides.

〔Exhaust pipe〕
As shown in FIGS. 12 to 14, an exhaust pipe 69 is provided for discharging the exhaust after purification processing by the exhaust purification device 10 . The exhaust pipe 69 is pulled out leftward from the rear portion of the left side surface of the outer peripheral portion of the exhaust purification device 10 and extends rearward and upward. The exhaust pipe 69 is provided between the threshing device 13 and the grain storage tank 15 so as to pass over the clutch switching device 70 and the fuel tank 16, which will be described later in detail. In the exhaust pipe 69, between an exhaust upstream end portion 71 communicatingly connected to the exhaust purification device 10 and a portion 72 downstream of the exhaust upstream end portion 71, for example, is provided to reduce the exhaust temperature. An outside air introduction portion 76 for introducing outside air is formed inside the exhaust pipe 69 . A front step 77 and a rear step 78 are provided above the exhaust pipe 69 between the operation cabin 7 and the grain storage tank 15 and the threshing device 13 .

[Side panel]
As shown in FIGS. 5 to 8 , the side panel 59 is provided on the left side of the driver's seat 57 . The side panel 59 is provided with a main shift lever 79 , an auxiliary shift lever 80 and a clutch switching lever 81 . A position detection sensor 82 for detecting the operating position of the clutch switching lever 81 is provided below the side panel 59 and above the exhaust purification device 10 .

The main shift lever 79 is a forward and backward swing operation type lever, and shifts the HST 20 . The sub-transmission lever 80 is a front-rear oscillating lever, and is used to shift the sub-transmission device. The main shift lever 79 and the sub shift lever 80 are arranged side by side so that the main shift lever 79 is positioned on the left side and the sub shift lever 80 is positioned on the right side.
That is, the main shift lever 79 is located on the opposite side of the driver's seat 57 in the lateral direction of the vehicle body with respect to the sub shift lever 80 . Here, if the length of protrusion of the portion of the main shift lever 79 that protrudes from the upper surface of the side panel 59 is L1, and the length of protrusion of the portion of the sub shift lever 80 that protrudes from the upper surface of the side panel 59 is L2, The shift lever 79 is configured such that the projection length L1 is longer than the projection length L2.

An upper frame 83 is provided to support the side panel 59 . A top plate 67 is provided on the upper frame 83 . The top plate 67 is provided between the exhaust gas purification device 10 and the position detection sensor 82 , vertically partitions the space between the exhaust gas purification device 10 and the position detection sensor 82 , and separates the exhaust gas purification device 10 from the exhaust gas purification device 10 . Not only the protruding part but also the whole is covered from above. The top plate 67 extends over the front end and the rear end of the side panel 59 and also extends over the left side and right side of the side panel 59 .

A front cover 135 is provided in the lower space of the side panel 59 to cover the exhaust purification device 10 from the front side. A space below the side panel 59 is partitioned by a front cover 135 into a front space and a rear space (a space on the side where the exhaust purification device 10 is located). An upper end portion of the front cover 135 is supported by the top plate 67 via stays 136 .

〔cover〕
A cover 84 is provided to cover the space below the side panel 59 from the left side of the exhaust purification device 10 . The cover 84 extends in the longitudinal direction of the fuselage such that the front end of the cover 84 is positioned forward of the front end of the side panel 59 and the rear end of the cover 84 is positioned rearward of the rear end of the side panel 59 . ing. A notch portion 84 a is formed in the rear portion of the cover 84 so as not to interfere with the exhaust upstream end portion 71 of the exhaust pipe 69 . The cover 84 is formed with a bulging portion 84b that bulges leftward from the other portions. That is, in a plan view, the portion of the cover 84 located laterally adjacent to the exhaust purification device 10 (the bulging portion 84b) bulges leftward more than the other portions.

The cover 84 is supported by the upper frame 83 and the lower frame 66 and is detachably attached to the upper frame 83 and the lower frame 66 . A portion of the upper frame 83 corresponding to the bulging portion 84b protrudes leftward from the other portions. A portion of the lower frame 66 corresponding to the bulging portion 84b protrudes leftward from the other portions. The upper portion of the cover 84 is detachably fixed to the vertical wall portion 83 a of the upper frame 83 by bolts 85 . The lower frame 66 is provided with a stay 86 extending upward from the lower frame 66 . A lower portion of the cover 84 is detachably fixed to a stay 86 with a bolt 87 .

[Vertical frame]
A vertical frame 88 extending vertically is provided across the upper frame 83 and the lower frame 66 . The vertical frame 88 is positioned on the left side of the cover 84 and is provided so as to overlap the cover 84 in a side view. That is, the vertical frame 88 is positioned on the left side of the exhaust purification device 10 and is provided so as to overlap the exhaust purification device 10 in a side view. The vertical frame 88 is supported by the upper frame 83 and the lower frame 66 and is detachable from the upper frame 83 and the lower frame 66 . The upper end portion of the vertical frame 88 is detachably fixed to the vertical wall portion 83 a of the upper frame 83 by bolts 85 together with the upper portion of the cover 84 . The lower frame 66 is provided with a stay 89 extending downward from the lower frame 66 . A lower end portion of the vertical frame 88 protrudes below the lower end of the lower frame 66 and is detachably fixed to the stay 89 with a bolt 90 .

[Clutch switching lever]
As shown in FIGS. 9 to 11, the clutch switching lever 81 is a lever that swings back and forth. is. The clutch switching lever 81 is configured to be changeable between a first operating position O1, a second operating position O2, and a third operating position O3. The first operating position O1 is an operating position in which both the reaping clutch 51 and the threshing clutch 40 are on. The second operating position O2 is an operating position in which the reaping clutch 51 is in a disengaged state and the threshing clutch 40 is in an on state. The third operating position O3 is an operating position in which both the reaping clutch 51 and the threshing clutch 40 are in a disengaged state. The clutch switching lever 81 is provided behind the main transmission lever 79 .

The clutch switching lever 81 is configured to swing back and forth around a swing axis X1 extending in the lateral direction of the machine body. The clutch switching lever 81 includes a grip 91 , a grip-side lever body 92 , a shaft-side lever body 93 , and a lever support shaft 94 . The grip-side lever body 92 is connected to the support shaft-side lever body 93 by a hinge 95 with a spring (not shown) so as to be able to swing left and right. The spring urges the grip-side lever body 92 to swing to the left. The grip-side lever body 92 is provided with a stopper 92a that abuts against the shaft-side lever body 93 to limit the swinging of the grip-side lever body 92 to the left.

[Swing support part]
A rocking support portion 96 is provided for rockingly supporting the clutch switching lever 81 about the rocking axis X1. A position detection sensor 82 is also supported by the swing support portion 96 . The rocking support portion 96 is placed and supported on the upper surface portion of the top plate 67 inside the side panel 59 .
The rocking support portion 96 is made of a substantially L-shaped plate material. The rocking support portion 96 includes a base portion 97 along the top plate 67 and a vertical wall portion 98 perpendicular or substantially perpendicular to the top plate 67 . The base 97 is fixed to the top plate 67 with bolts 99 . The vertical wall portion 98 is provided with a boss portion 100 through which the lever support shaft 94 is inserted. A mounting portion 101 to which the position detection sensor 82 is mounted is provided on the left side of the vertical wall portion 98 .

[Guide part]
A lever guide 103 having a guide portion 102 for guiding the clutch switching lever 81 is provided. The lever guide 103 is provided so as to straddle the swing support portion 96 from side to side. Leg portions 103a are formed at both left and right ends of the lever guide 103, respectively. The legs 103 a are fixed to the top plate 67 with bolts 104 . The guide portion 102 is provided in a portion of the lever guide 103 located above the swing support portion 96 .

The guide portion 102 is provided with a linear portion 102a and a recessed portion 102b.
The linear portion 102a extends linearly in the swing operation direction (front-rear direction) of the clutch switching lever 81 . In the linear portion 102a, the width B2 of the section on the first operating position O1 side is narrower than the width B1 of the section spanning the second operating position O2 and the third operating position O3.

The entering portion 102b has a shape that enters in a direction (leftward) that intersects the swinging operation direction of the clutch switching lever 81 while being continuous with the straight portion 102a. The entering portion 102b is provided at a position corresponding to the first operating position O1, a position corresponding to the second operating position O2, and a position corresponding to the third operating position O3, respectively. When the grip-side lever body 92 is inserted into the insertion portion 102b, the spring biases the grip-side lever body 92 toward the insertion portion 102b, thereby holding the clutch switching lever 81 at each operating position.

Although the clutch switching lever 81 is a lever of the forward/backward rocking operation type as described above, it is configured so as to be capable of being rocked forward/backward along the straight portion 102a after the preliminary operation is performed. Specifically, the clutch switching lever 81 is moved along the linear portion 102a after the grip-side lever body 92 is moved out of the recessed portion 102b against the biasing force of the spring as the preliminary operation. It is configured to be capable of rocking back and forth. As a result, when the clutch switching lever 81 is held at each operating position, the clutch switching lever 81 cannot be swung back and forth along the straight portion 102a, but the grip-side lever body 92 is moved by the spring. The clutch switching lever 81 can be swung back and forth along the straight portion 102a by swinging it to the right against the urging force to escape from the entering portion 102b.

Here, when the clutch switching lever 81 is to be switched from the third operation position O3 side to the first operation position O1 in a state in which the grip-side lever body 92 is swung to the right, the grip-side lever body 92 moves toward the guide portion. The end portion 102c of the portion 102 is brought into contact with the clutch switching lever 81 so as to prevent the clutch switching lever 81 from swinging forward. Therefore, in order to release the contact with the end portion 102c of the guide portion 102, it is necessary to swing the grip-side lever body 92 slightly leftward and then swing the clutch switching lever 81 forward. be.

[Clutch switching device]
As shown in FIGS. 12 to 17, a clutch switching device 70 is provided for switching the reaping clutch 51, the threshing clutch 40, and the grain discharge clutch 37 between the ON state and the OFF state at appropriate timings. The clutch switching device 70 is provided behind the vertical conveying device 31 between the threshing device 13 and the grain storage tank 15 . The clutch switching device 70 is provided between the first screw 29 and the second screw 30 in the longitudinal direction of the machine body. The clutch switching device 70 is provided below the lower narrowed portion 15 a of the grain storage tank 15 . In other words, the clutch switching device 70 is provided so as to overlap the grain storage tank 15 in plan view. The clutch switching device 70 is provided so as to overlap the base portion of the second return device 32 in a side view. A fuel tank 16 is provided behind the clutch switching device 70 between the threshing device 13 and the grain storage tank 15 .

The fuselage frame 1 includes a main frame 1A extending in the longitudinal direction of the fuselage, and a lateral frame 1B extending in the lateral direction of the fuselage while intersecting the main frame 1A. The clutch switching device 70 is supported at an intersection where the main frame 1A and the lateral frame 1B intersect. A base plate 105 is provided at the intersection, and the clutch switching device 70 is detachably mounted and supported on the base plate 105 .

The clutch switching device 70 includes a case 106, first, second and third arms 107A, 107B and 107C, first, second and third cams 108A, 108B and 108C, an electric motor M, a first , second and third cable wires 109A, 109B, 109C and a top lid 110 are provided. The first arm 107A, the first cam 108A and the first cable wire 109A correspond to the reaping clutch 51. The second arm 107B, the second cam 108B and the second cable wire 109B correspond to the grain ejection clutch 37. The third arm 107C, the third cam 108C and the third cable wire 109C correspond to the threshing clutch 40.

The case 106 houses the first, second and third arms 107A, 107B and 107C and the first, second and third cams 108A, 108B and 108C. It is configured. The case 106 has a bottom portion 111 and sidewalls 112 .

The portion of the bottom portion 111 opposite to the side on which the first, second and third arms 107A, 107B and 107C are located with respect to the first, second and third cams 108A, 108B and 108C (the front portion of the bottom portion 111 ), a cleaning opening 111a is formed. The cleaning opening 111a is a circular opening. A bottom lid 113 is provided for opening and closing the cleaning port 111a. A notch 105 a is formed in a portion of the base plate 105 corresponding to the bottom lid 113 so as not to interfere with the bottom lid 113 .

The side wall 112 includes a front wall portion 114 , a rear wall portion 115 , a left side wall portion 116 and a right side wall portion 117 . Attachment portions 118 for attaching the case 106 to the base plate 105 are provided on the laterally outer portion of the left side wall portion 116 and the laterally outer portion of the right side wall portion 117 respectively. The mounting portion 118 is detachably fixed to the base plate 105 with bolts 119 . A nut 120 (welding nut) for the bolt 119 is provided on the back surface of the base plate 105 .

The first, second, and third arms 107A, 107B, and 107C are swingable about the same swing axis X2 extending in the left-right direction of the fuselage, and arranged side by side in the swing axis X2 direction. .
The first, second, and third arms 107A, 107B, and 107C are supported by an arm support shaft 121 so as to be relatively rotatable. The arm support shaft 121 is provided over wall portions (the left side wall portion 116 and the right side wall portion 117) of the side wall 112 that face each other in the swing axis X2 direction. Lower ends of the first, second, and third arms 107A, 107B, and 107C are connected to the arm support shaft 121 . The arm support shaft 121 is provided with stoppers 122 that position the first, second, and third arms 107A, 107B, and 107C at initial positions (wire pulling start positions). Arm support shaft 121 and stopper 122 are connected via stay 123 . When viewed from the side (see FIG. 16), the first, second, and third arms 107A, 107B, and 107C at the wire drawing start position are in a slightly forward inclined posture. The stroke S over the position is made large so that it can be used for various types of machines.

Each of the first, second, and third arms 107A, 107B, and 107C is configured by a member having a substantially U-shaped cross section. Upper ends of the first, second, and third arms 107C protrude upward from the case 106. As shown in FIG. A first roller 123A that can come into contact with the first cam 108A is provided in the upper and lower middle portion of the first arm 107A. A second roller 123B that can come into contact with the second cam 108B is provided in the upper and lower intermediate portion of the second arm 107B. A third roller 123C that can come into contact with the third cam 108C is provided in the upper and lower middle portion of the third arm 107C.

The end of the inner wire of the first cable wire 109A on the first arm 107A side is connected to the upper end of the first arm 107A. An adjustment spring (not shown) is provided at the end of the inner wire of the first cable wire 109A on the reaping clutch 51 side. No adjusting spring is provided between the first arm 107A side end portion. The end of the inner wire of the second cable wire 109B on the second arm 107B side is connected to the upper end of the second arm 107B. An adjustment spring (not shown) is provided at the end of the inner wire of the second cable wire 109B on the grain discharge clutch 37 side, but the upper end of the second arm 107B and the second cable wire 109B No adjustment spring is provided between the inner wire and the end on the second arm 107B side. The end of the inner wire of the third cable wire 109C on the side of the third arm 107C is connected to the upper end of the third arm 107C. An adjustment spring (not shown) is provided at the end of the inner wire of the third cable wire 109C on the side of the threshing clutch 40, but the upper end of the third arm 107C and the inner wire of the third cable wire 109C No adjustment spring is provided between the end on the third arm 107C side.

The first, second and third arms 107A, 107B and 107C are the first arm 107A corresponding to the reaping clutch 51 and the third arm 107C corresponding to the threshing clutch 40 are the second arms corresponding to the grain discharge clutch 37. 107B is supported by the arm support shaft 121 in a state of being sandwiched from both sides in the direction of the swing axis X2. That is, the first arm 107A is supported by a portion of the arm support shaft 121 closer to the left side wall portion 116 than the second arm 107B, and the third arm 107C is supported on the arm support shaft 121 rather than the second arm 107B. Among them, the portion near the right side wall portion 117 is supported.

Here, normally, the force acting on the first arm 107A when the first arm 107A corresponding to the reaping clutch 51 pulls the first cable wire 109A, and the force acting on the first arm 107A corresponding to the threshing clutch 40 is applied to the third cable wire. The force acting on the third arm 107C when pulling 109C is greater than the force acting on the second arm 107B when the second arm 107B corresponding to the grain discharge clutch 37 pulls the second cable wire 109B. That is, among the first, second, and third arms 107A, 107B, and 107C, the larger the force acting when pulling the first, second, and third cable wires 109A, 109B, and 109C, the larger the arm support shaft 121. It is supported by a portion near the left side wall portion 116 or the right side wall portion 117 .

The first, second, and third cams 108A, 108B, and 108C are rotatable about the same rotation axis X3 extending in the lateral direction of the fuselage parallel to the swing axis X2. They are arranged in the direction of the rotation axis X3 so as to correspond to the arms 107A, 107B, and 107C. The first, second and third cams 108A, 108B and 108C are supported by a cam support shaft 124 so as not to rotate relative to each other. The cam support shaft 124 is provided across the left side wall portion 116 and the right side wall portion 117 . Bearings 125 that rotatably support the cam support shaft 124 are provided on the left side wall portion 116 and the right side wall portion 117, respectively. The first, second and third cams 108A, 108B and 108C are connected to a cam support shaft 124 via a key 126. As shown in FIG. A gear portion is formed on the outer peripheral portion of the first cam 108A.

Holes 108Aa, 108Ba and 108Ca are formed in the first, second and third cams 108A, 108B and 108C, respectively. The first, second, third By attaching the cams 108A, 108B, 108C to the cam support shaft 124, misassembly of the first, second, and third cams 108A, 108B, 108C to the cam support shaft 124 can be prevented.

A rotation angle detection sensor 127 is provided to detect the rotation angles of the first, second, and third cams 108A, 108B, and 108C. A mounting groove 124a to which a rotation angle detection sensor 127 is mounted is formed at the right end of the cam support shaft 124. As shown in FIG. The rotation angle detection sensor 127 is supported by the right side wall portion 117 . The right side wall portion 117 is provided with a mounting portion 128 to which the rotation angle detection sensor 127 is mounted.

Here, as described above, while the mounting portion 128 is provided on the right side wall portion 117, it is necessary to mount the cam support shaft 124 to the case 106 with the mounting groove 124a positioned on the right side. If the cam support shaft 124 is mistakenly attached to the case 106 with the mounting groove 124a positioned on the left side, the rotation angle detection sensor 127 cannot be attached to the cam support shaft 124. You will notice that the is installed in the left-right reversed direction.

The first cable wire 109A connects the first arm 107A and the reaping clutch 51, and is provided across the first arm 107A and the reaping clutch 51. As shown in FIG. The first cable wire 109A extends forward from the upper end of the first arm 107A and horizontally extends forward while passing over the first cam 108A. The second cable wire 109B links the second arm 107B and the grain discharge clutch 37, and is provided across the second arm 107B and the grain discharge clutch 37. The second cable wire 109B extends forward from the upper end of the second arm 107B and horizontally extends forward while passing over the second cam 108B. The third cable wire 109C links the third arm 107C and the threshing clutch 40 and is provided across the third arm 107C and the threshing clutch 40 . The third cable wire 109C extends forward from the upper end of the third arm 107C and horizontally extends forward while passing over the third cam 108C.

A support 129 is provided to support the first, second and third cable wires 109A, 109B, 109C. In the support portion 129, the end of the outer wire of the first cable wire 109A on the first arm 107A side, the end of the outer wire of the second cable wire 109B on the second arm 107B side, and the end of the third cable wire 109C The end of the outer wire on the third arm 107C side is supported. The support portion 129 is provided on the side of the case 106 opposite to the side on which the first, second and third arms 107A, 107B and 107C are positioned with respect to the first, second and third cams 108A, 108B and 108C. provided on the upper surface of the portion (the front portion of the side wall 112). The support portion 129 is configured by a substantially L-shaped plate member.

The upper lid 110 opens and closes the portion of the case 106 that opens upward, and is formed of a rectangular box-shaped member that opens downward and forward. First, second, and third cable wires 109A, 109B, and 109C are passed through a portion of the upper lid 110 that opens forward. A portion of the upper lid 110 that opens forward is closed from the front by a support portion 129 . Left and right side portions of the lower rear portion of the upper lid 110 are fixed to the left side wall portion 116 and the right side wall portion 117 by bolts 130, respectively. Engagement protrusions 110 a that engage with the corners of the support portion 129 are formed on both left and right sides of the front lower portion of the upper lid 110 .

The electric motor M rotates the first, second and third cams 108A, 108B and 108C. The output shaft Ma of the electric motor M is provided with a pinion gear 131 that meshes with the gear portion of the first cam 108A. Rotational power of the electric motor M is transmitted from the output shaft Ma to the gear portion of the first cam 108A through the pinion gear 131, thereby rotating the first, second, and third cams 108A, 108B, and 108C. become.

The electric motor M is supported by the left side wall portion 116 . The electric motor M is bolted to the left side wall portion 116 . A relay 132 for the electric motor M is supported by a wall portion (front wall portion 114) of the side wall 112 on the extending direction side of the first, second, and third cable wires 109A, 109B, and 109C. Relay 132 is bolted to front wall 114 . A control device 133 for the cooling fan 11 is supported on a wall portion (right side wall portion 117) of the side wall 112 that is different from the wall portion on which the relay 132 is supported. The control device 133 is bolted to the right side wall portion 117 .

As shown in FIG. 18, the control block includes a control device 134 that drives and controls the electric motor M. As shown in FIG. The position detection sensor 82, the grain discharge operation unit 60, the rotation angle detection sensor 127, and the electric motor M are connected to the control device 134. As shown in FIG. A detection value of the position detection sensor 82 , a clutch switching operation command of the grain discharge operation unit 60 , and a detection value of the rotation angle detection sensor 127 are input to the control device 134 . The control device 134 drives and controls the electric motor M according to the detection value of the position detection sensor 82 and the clutch switching operation command of the grain discharge operation unit 60 .

FIG. 19 shows the rotational positions (neutral position N, first rotational position R1, second rotational position R2, third rotational position R3) of the first, second and third cams 108A, 108B and 108C. The first cam 108A corresponding to the reaping clutch 51 and the third cam 108C corresponding to the threshing clutch 40 are rotationally driven to one side (front side) around the rotation axis X3 from the neutral position N, and the grain discharging clutch 37 The second cam 108B corresponding to is rotationally driven from the neutral position N to the other side (rear side) around the rotation axis X3. When the first, second and third cams 108A, 108B and 108C are rotationally driven by the electric motor M, the first, second and third arms 107A, 107B and 107C respectively rotate the first, second and third cams. By the action of the three cams 108A, 108B, 108C (cam action on the first, second, third rollers 123A, 123B, 123C), the first and second , and third arms 107A, 107B, and 107C pull the first, second, and third cable wires 109A, 109B, and 109C, respectively, to engage the reaping clutch 51, the threshing clutch 40, and the grain discharging clutch 37. and the off state at appropriate timings.

More specifically, as shown in FIG. 20, in the neutral position N, the first, second and third cams 108A, 108B and 108C respectively cam the first, second and third arms 107A, 107B and 107C. doesn't work. Therefore, the reaping clutch 51, the grain discharging clutch 37, and the threshing clutch 40 are turned off.

In the first rotational position R1, the third cam 108C cams the third arm 107C and the first and second cams 108A, 108B do not cam the first and second arms 107A, 107B, respectively. . Therefore, the threshing clutch 40 is turned on, and the reaping clutch 51 and the grain discharge clutch 37 are turned off.

In the second rotational position R2, the first and third cams 108A, 108C cam the first and third arms 107A, 107C, respectively, and the second cam 108B does not cam the second arm 107B. . Therefore, the reaping clutch 51 and the threshing clutch 40 are turned on, and the grain discharge clutch 37 is turned off.

In the third rotational position R3, the second cam 108B cams the second arm 107B and the first and third cams 108A, 108C do not cam the first and third arms 107A, 107C, respectively. . Therefore, the grain discharging clutch 37 is turned on, and the reaping clutch 51 and the threshing clutch 40 are turned off.

[Another embodiment]
(1) In the above embodiment, the exhaust pipe 69 is drawn leftward from the rear portion of the left side surface of the outer peripheral portion of the exhaust purification device 10 and extends rearward and upward. However, the exhaust pipe 69 may be pulled out from the right side surface, upper surface, lower surface, front surface, and rear surface of the outer peripheral portion of the exhaust purification device 10 and extend upward. For example, as shown in FIGS. 21 and 22, the exhaust pipe 69 may be drawn upward from the rear portion of the upper surface of the outer peripheral portion of the exhaust purification device 10 and extend rearward and upward.

(2) In the above embodiment, the rocking support portion 96 is placed and supported on the top surface of the top plate 67 .
However, as shown in FIGS. 21 to 24 , the swing support portion 96 may be suspended from the lower surface of the upper surface portion of the side panel 59 . The guide portion 102 is formed on the upper surface portion of the side panel 59 . The swing support portion 96 is provided with a first support plate member 137 and a second support plate member 138 . The first support plate member 137 and the second support plate member 138 are configured by substantially L-shaped plate members. The first support plate member 137 is fixed to the lower surface of the upper surface portion of the side panel 59 . The second support plate member 138 is fixed to the second support plate member 138 by bolts 139 from the left side while being overlaid on the first support plate member 137 from the left side. A mounting portion 101 to which the position detection sensor 82 is mounted is provided on the left side of the second support plate member 138 .

The exhaust purification device 10 is positioned rearwardly and downwardly with respect to the position detection sensor 82 . A partition wall 140 is provided between the exhaust purification device 10 and the position detection sensor 82 to vertically partition the space between the exhaust purification device 10 and the position detection sensor 82 . The partition wall 140 extends over the left side and the right side of the side panel 59 . The partition wall 140 includes a bottom portion 141 that covers the position detection sensor 82 from below and a rear wall portion 142 that covers the position detection sensor 82 from behind. An upper front strut 143 and a lower front strut 144 are provided to support the front portion of the side panel 59 . The bottom portion 141 is provided across the upper front strut 143 and the lower end portion of the rear wall portion 142 . The upper front strut 143 is provided with a stay 145 to which the front end of the bottom portion 141 is bolted.
A rear end portion of the bottom portion 141 is bolted to a lower end portion of the rear wall portion 142 . The rear wall portion 142 is suspended from the lower surface of the upper surface portion of the side panel 59 .

(3) In the above embodiment, the exhaust purification device 10 is provided in a state of protruding leftward from the left end 59 a of the side panel 59 . However, the exhaust emission control device 10 may be provided so as not to protrude leftward from the left end 59 a of the side panel 59 . In this case, the cover 84 may not have the bulging portion 84b.

(4) In the above embodiment, the cover 84 is detachable. However, the cover 84 may be non-detachable.

(5) In the above embodiment, the clutch switching lever 81 is provided behind the main transmission lever 79 . However, the clutch switching lever 81 may be provided behind the auxiliary transmission lever 80 .

(6) In the above-described embodiment, the clutch switching lever 81 is operated to move the grip-side lever body 92 out of the recessed portion 102b against the biasing force of the spring as the preliminary operation. It is configured to be capable of swinging back and forth along the . However, a push-operated switch (not shown) is provided at a grip portion of the clutch switching lever 81, and the clutch switching lever 81 can be swung after the switch is pushed as the preliminary operation. It may be configured to be Also, the clutch switching lever 81 may be configured to be swingable without the preliminary operation.

(7) In the above-described embodiment, the clutch switching device 70 is provided between the first screw 29 and the second screw 30 in the longitudinal direction of the machine body. However, the clutch switching device 70 may be provided behind the second screw 30 .

(8) In the above embodiment, the clutch switching device 70 is provided below the lower narrowed portion 15a of the grain storage tank 15 (in other words, overlapping the grain storage tank 15 in plan view). there is However, the clutch switching device 70 may be provided so as not to overlap the grain storage tank 15 in plan view.

(9) In the above embodiment, the fuel tank 16 is provided behind the clutch switching device 70 between the threshing device 13 and the grain storage tank 15 . However, the fuel tank 16 may be provided in front of the clutch switching device 70 between the threshing device 13 and the grain storage tank 15 .

(10) In the above embodiment, the base plate 105 is provided at the intersection of the main frame 1A and the lateral frame 1B, and the clutch switching device 70 is detachably mounted and supported on the base plate 105. However, the clutch switching device 70 may be supported at the intersection without the base plate 105 provided. Alternatively, the clutch switching device 70 may be supported only by the main frame 1A.

(11) In the above embodiment, the case 106 opens upward, and the upper lid 110 is provided to open and close the portion of the case 106 that opens upward. However, the upper lid 110 may not be provided without the case 106 opening upward.

(12) In the above embodiment, the first arm 107A is supported by a portion of the arm support shaft 121 closer to the left side wall portion 116 than the second arm 107B, and the third arm 107C is supported by a portion closer to the left side wall portion 116 than the second arm 107B. It is supported by a portion of the support shaft 121 near the right side wall portion 117 . However, the left and right positions of the first arm 107A and the third arm 107C may be reversed.
Also, the second arm 107B may be supported by a portion of the arm support shaft 121 near the left side wall portion 116 or the right side wall portion 117 .

(13) In the above embodiment, the relay 132 for the electric motor M is supported by the front wall portion 114 of the side walls 112 . However, relay 132 may be supported on a wall portion of side wall 112 other than front wall portion 114 . Also, the relay 132 may not be supported by the side wall 112 .

(14) In the above embodiment, the control device 133 for the cooling fan 11 is supported by the right side wall portion 117 of the side wall 112 . However, control device 133 may be supported by a wall portion of side wall 112 other than right side wall portion 117 . Also, the control device 133 may not be supported by the side wall 112 .

(15) In the above embodiment, the left side wall portion 116 of the side wall 112 supports the electric motor M, and the right side wall portion 117 of the side wall 112 supports the rotation angle detection sensor 127 . However, the electric motor M may be supported on the right side wall portion 117 of the side walls 112 and the rotation angle detection sensor 127 may be supported on the left side wall portion 116 of the side walls 112 .

(16) In the above embodiment, the clutch switching device 70 controls the reaping clutch 51 , the threshing clutch 40 and the grain discharging clutch 37 . However, the control target of the clutch switching device 70 is not limited to the control target according to the above embodiment. For example, when increasing the number of objects controlled by the clutch switching device 70, the cams can be increased in the direction of the rotation axis X3 because the case 106 has sufficient left-right width. Further, the clutch switching device 70 is an operating state switching device that switches the operating states of a plurality of operating devices (the reaping clutch 51, the threshing clutch 40 and the grain discharge clutch 37 in the above embodiment) at appropriate timing. The object to be controlled by the state switching device may be a clutch other than the clutch according to the above embodiment, or a transmission.

INDUSTRIAL APPLICABILITY The present invention can be applied to a self-threshing combine as well as a normal combine.

3 Reaping Part 13 Threshing Device 15 Grain Storage Tank 17 Grain Discharge Device 37 Grain Discharge Clutch 40 Threshing Clutch 51 Reaping Clutch 70 Clutch Switching Device (Operation State Switching Device)
106 case 107A first arm 107B second arm 107C third arm 108A first cam 108B second cam 108C third cam 109A first cable wire 109B second cable wire 109C third cable wire 110 top cover 111 bottom 111a cleaning port 112 side wall 113 Bottom cover 118 Mounting portion 121 Arm spindle (support axis)
127 rotation angle detection sensor 129 support portion 132 relay 133 control device M electric motor (driving actuator)
X2 Oscillation axis X3 Rotation axis

Claims (12)

A combine having an operating state switching device that switches the operating states of a plurality of operating devices at appropriate timing,
The operating state switching device includes a plurality of arms that are swingable around the same swing axis and are arranged in the direction of the swing axis, and a plurality of arms that rotate in the same direction parallel to the swing axis. a plurality of cams rotatable about an axis and arranged in a row in the direction of the rotation axis so as to correspond to each of the plurality of arms; a drive actuator that rotationally drives the plurality of cams; a plurality of cable wires linking each of the arms and each of the plurality of actuators and extending in the same direction from each of the plurality of arms;
When the plurality of cams are rotationally driven by the drive actuator, each of the plurality of arms is swung to the same side about the swing axis by the action of the cam, and each of the plurality of arms swings to the same side. By pulling each of the plurality of cable wires, the operating states of the plurality of actuators are configured to be switched at appropriate timing,
an arm that swings only when the plurality of cams are rotated to one side about the rotation axis to pull any one of the plurality of cable wires; an arm that swings only when the plurality of cams are rotated to the other side about the rotation axis to pull any one of the plurality of cable wires,
A combine harvester configured to pull the cable wire by swinging all of the plurality of arms in the same direction around the swing axis. The operating state switching device has a case that houses the plurality of arms and the plurality of cams,
the upper ends of the plurality of arms projecting upward from the case, and the cable wires are connected to the upper ends of the respective arms;
2. A combine according to claim 1, wherein said plurality of cable wires extend horizontally while passing over said cam. 3. The combine according to claim 2, wherein a support portion for supporting the cable wire is provided on a side portion of the case opposite to the side where the arm is positioned with respect to the cam. the case has a bottom portion and side walls that cover the plurality of arms and the plurality of cams from the front, rear, left and right, and is open upward;
The combine according to claim 2 or 3, further comprising an upper lid for opening and closing a portion of the case that opens upward. A cleaning opening is formed in a portion of the bottom portion opposite to the side where the arm is positioned with respect to the cam,
The combine according to claim 4, further comprising a bottom lid for opening and closing said cleaning port. a support shaft supporting the plurality of arms so as to be able to swing about the swing axis is provided across wall portions of the side walls that face each other in the swing axis direction;
The combine according to claim 4 or 5, wherein among the plurality of arms, an arm that exerts a greater force when pulling the cable wire is supported by a portion of the support shaft closer to the wall. The combine according to any one of claims 4 to 6, wherein the relay for the drive actuator is supported on a wall portion of the side walls in the extending direction of the cable wire. 8. The combine according to claim 7, wherein a control device for a device other than the operating state switching device is supported on a wall portion of the side walls that is different from the wall portion on which the relay is supported. A rotation angle detection sensor that detects the rotation angle of the cam is provided,
The driving actuator is supported on one side wall portion of the side wall in the rotation axis direction, and the rotation angle detection sensor is supported on the other side wall portion of the side wall in the rotation axis direction. 9. A combine as claimed in any one of claims 4 to 8. The combine according to any one of claims 4 to 9, wherein an attachment portion for attaching the case to the machine body is provided on an outer portion of the case. a reaping part for reaping planted grain culms;
a threshing device for threshing harvested grain culms;
a grain storage tank for storing grains after threshing;
a grain discharging device for discharging grains in the grain storage tank;
The actuating devices include a reaping clutch that turns power transmission to the reaping unit on and off, a threshing clutch that turns power transmission to the threshing device on and off, and a grain that turns power transmission to the grain discharging device on and off. an ejection clutch;
Among the plurality of cams, the cam corresponding to the reaping clutch and the cam corresponding to the threshing clutch are rotationally driven to one side about the rotation axis, and among the plurality of cams, the grain discharge clutch is driven to rotate. The combine according to any one of claims 1 to 10, wherein the corresponding cams are rotationally driven to the other side about the rotation axis. The operating state switching device has a case that houses the plurality of arms and the plurality of cams,
the case has a bottom portion and side walls that cover the plurality of arms and the plurality of cams from the front, rear, left and right;
a support shaft supporting the plurality of arms so as to be able to swing about the swing axis is provided across wall portions of the side walls that face each other in the swing axis direction;
In the plurality of arms, the arm corresponding to the reaping clutch and the arm corresponding to the threshing clutch among the plurality of arms are arranged such that the arm corresponding to the grain discharge clutch among the plurality of arms is connected to the swing shaft. 12. The combine according to claim 11, which is supported by said support shaft in a state of being sandwiched from both sides in the center direction.

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