JP6861024B2 - Harvester - Google Patents

Description

The present invention relates to a structure for changing the working state of a working device (cutting unit, threshing device, etc.) supported by the machine in the harvesting machine.

In a combine harvester, which is an example of a harvester, a cutting unit (corresponding to a working device) and a threshing device (corresponding to a working device) are supported by the machine body, and power is transmitted to and cut off from the harvesting unit. It is equipped with a threshing clutch that can transmit and shut off.

As a structure of the operation system of the cutting clutch and the threshing clutch, there is one as disclosed in Patent Document 1.
In Patent Document 1, an operation lever is swingably supported around a laterally swinging shaft core of an operation panel of an operation unit, and a limit switch for detecting a rotation angle of the operation lever is provided. An electric motor for operating the cutting clutch and the threshing clutch is provided, and when the operation lever is operated, the electric motor operates based on the detection signal of the limit switch, and the cutting clutch and the threshing clutch are put into the on and off states. Be manipulated.

Japanese Unexamined Patent Publication No. 2011-92093

In Patent Document 1, a fan-shaped operation plate is connected downward to the base of the operation lever, and a plurality of limit switches are arranged below the operation plate. The operation plate swings by operating the operation lever to limit. The switch is operated.

As a result, in Patent Document 1, since a space for arranging the operation plate and the limit switch is required below the base of the operation lever, there is room for improvement in terms of space saving in the vicinity of the operation lever. is there.
An object of the present invention is to save space in the vicinity of the operating lever in a harvester that changes the working state of the working device by an actuator based on the operation of the operating lever.

A feature of the present invention is that the harvester is configured as follows.
The operation shaft, which is located inside the operation panel of the operation unit and is rotatably supported around the lateral swing axis,
An operation lever arranged on the operation panel, connected to one end of the operation shaft, and commanding a change in the working state of the work device by a swing operation around the swing shaft core.
A rotation angle detection sensor arranged inside the operation panel, connected to the other end of the operation shaft, and detecting the rotation angle of the operation lever,
An actuator that changes the working state of the working device based on the detection signal of the rotation angle detection sensor is provided.
The rotation angle detection sensor is arranged on the swing axis by being connected to the opposite end of the operation lever on the operation shaft.
A detent mechanism for holding the operating lever at a plurality of operating positions is provided.
The grip portion, the first arm portion extending upward from the operation shaft, and the upper end portion of the first arm portion extending laterally on the opposite side of the rotation angle detection sensor to the operating lever and are connected to the grip portion. The second arm part is provided,
The detent mechanism is arranged in a region of the side of the first arm portion on the side where the second arm portion extends with respect to the first arm portion and in a region below the second arm portion. Then, the operating lever is held in position by engaging with the first arm portion or the second arm portion.

According to the present invention, the operation position of the operation lever is detected by detecting the rotation angle of the operation lever with the rotation angle detection sensor, and the rotation angle detection sensor is arranged at a position on the swing axis of the operation lever. Has been done.
As a result, when viewed from the direction of the swing shaft core, the swing shaft core and the rotation angle detection sensor overlap each other, so that the rotation angle detection sensor does not protrude significantly downward from the swing shaft core. , Space can be saved near the operation lever.
As described above, according to the present invention, the area below the operating lever can be widely used, and arranging another device below the operating lever is affected by the rotation angle detection sensor. You will be able to do it without any problems.

According to the present invention, the operating lever is provided with a first arm portion and a second arm portion, and the operating lever is provided with a bent portion.
When such an operation lever is provided with a detent mechanism for holding the operation lever at a plurality of operation positions, according to the present invention, the second arm portion is on the side of the side where the second arm portion extends with respect to the first arm portion. A detent mechanism is arranged in the area below the arm portion, and the detent mechanism engages with the first arm portion or the second arm portion to hold the position of the operating lever.

As described above, when the operating lever is provided with a bent portion by the first arm portion and the second arm portion, the area surrounded by the first arm portion and the second arm portion of the operating lever is effectively used. As a result, the detent mechanism can be arranged compactly without difficulty.

It is a left side view of the combine. It is a plan view of a combine. It is a right side view near the operation panel. It is a top view near the operation lever. It is sectional drawing seen from the VV direction in FIG. FIG. 4 is a cross-sectional view seen from the VI-VI direction in FIG. It is a figure which shows the relationship of a control device, an operation lever, an electric motor, a cutting clutch and a threshing clutch. It is a top view which shows another structure of the operation lever. FIG. 8 is a cross-sectional view seen from the IX-IX direction in FIG. It is a perspective view which shows another structure of the operation lever.

Unless otherwise specified, the front-rear direction and the left-right direction in the embodiment of the present invention are described as follows. The direction of travel on the forward side during work travel is "forward", and the direction of travel on the reverse side is "rear". The direction corresponding to the right side is "right" and the direction corresponding to the left side is "left" with respect to the forward posture in the front-back direction.

(Overall composition of combine harvester)
FIGS. 1 and 2 show a self-removing combine harvester for rice, which is an example of a harvester, and the body 1 is supported by the crawler-type traveling devices 2 on the right and left. A cutting section 3 (corresponding to a working device) is supported on the front portion of the machine body 1, and a driving section 4 covered with a cabin is supported on the right portion of the front portion of the machine body 1. A threshing device 5 (corresponding to a working device) and a waste straw shredding device 6 (corresponding to a working device) are supported on the left side of the rear part of the machine body 1, and a grain tank 7 and a grain tank 7 are supported on the right part of the rear part of the machine body 1. The grain discharge device 8 is supported.

With the above structure, as shown in FIGS. 1 and 2, the grain culms in the field are cut by the cutting unit 3, and the stock of the cut culms is delivered to the feed chain 9 provided in the threshing device 5. The culm is transported to the rear side, and the tip of the culm is threshed by the threshing device 5. The grains that have been threshed and collected by the threshing device 5 are supplied to the grain tank 7, and the waste straw that has been threshed is supplied to the waste straw shredding device 6 and shredded and released to the field.

(Overview of the operation system of the cutting section, threshing device, and waste straw shredding device)
As shown in FIG. 7, the cutting unit 3 is provided with a cutting clutch 10 that transmits and shuts off the power to operate and stop the cutting unit 3, and the power is transmitted and cut off to the threshing device 5 and the waste straw shredding device 6. A threshing clutch 11 for operating and stopping the threshing device 5 and the waste straw shredding device 6 is provided. An electric motor 12 (corresponding to an actuator) that operates the cutting clutch 10 and the threshing clutch 11 in the on and off states is provided.

As shown in FIG. 7, the operation lever 14 is swingably supported around the swing axis P1, and a rotation angle detection sensor 15 for detecting the rotation angle of the operation lever 14 is provided. The detection signal of 15 is input to the control device 13.

As a result, as shown in FIG. 7, an operation command is output from the control device 13 to the electric motor 12 based on the detection signal of the rotation angle detection sensor 15, and the electric motor 12 disengages the cutting clutch 10 and the grain removal clutch 11. Operate in the entered state and the cut state as follows (corresponding to the state in which the working state of the working device is changed by the actuator).

As shown in FIG. 7, when the operating lever 14 is operated to the cutting position AA (corresponding to the operating position), both the cutting clutch 10 and the threshing clutch 11 are operated in the cut state.
When the operating lever 14 is operated to the first position A1 (corresponding to the operating position), the cutting clutch 10 is operated to the disengaged state, and the threshing clutch 11 is operated to the engaged state.
When the operating lever 14 is operated to the second position A2 (corresponding to the operating position), both the cutting clutch 10 and the threshing clutch 11 are operated in the engaged state.

(Detailed structure of operating lever)
As shown in FIGS. 1, 2 and 3, the operation panel 17 is provided on the side of the driver's seat 16 in the driver's unit 4. The operation lever 14 is arranged on the operation panel 17, and extends upward through the guide hole 17a of the operation panel 17.

As shown in FIGS. 1, 2 and 3, a speed change lever 18 for operating a hydrostatic continuously variable transmission (not shown) for traveling is provided on the front side of the operation lever 14, and the speed change lever 18 is operated. It extends upward through the guide hole 17b of the panel 17.

As shown in FIGS. 4, 5 and 6, inside the operation panel 17, a cylindrical support member 20 is laterally oriented in the left-right direction on a vertically-oriented support member 19 connected to a fixed frame (not shown). The operation shaft 21 is rotatably supported by the support member 20 by the needle bearing 22.

As shown in FIGS. 4, 5 and 6, the operation lever 14 is connected to the end of the operation shaft 21 on the driver's seat 16 side, and the operation lever 14 swings laterally, which is the axis of the operation shaft 21. It is supported around the shaft core P1 so as to be swingable.

As shown in FIGS. 4, 5 and 6, the operation lever 14 is connected to the end of the operation shaft 21 on the driver's seat 16 side and extends upward from the operation shaft 21 and the first arm portion 14a and the first arm portion 14a. The second arm portion 14b extending laterally from the upper end portion to the driver's seat 16 side, the third arm portion 14c extending upward from the end portion of the second arm portion 14b, and the upper portion of the third arm portion 14c are connected to each other. A grip portion 14d is provided.

As shown in FIGS. 4 and 6, a stopper ring 23 is attached to an end portion of the operation shaft 21 opposite to the driver's seat 16, and the first arm portion 14a and the stopper ring 23 of the operation lever 14 provide the stopper ring 23. The position of the operation shaft 21 in the direction of the swing shaft core P1 in the support member 20 is determined.

As shown in FIGS. 5 and 6, at the end of the support member 20 on the driver's seat 16 side, a ring-shaped gap between the support member 20 and the operation shaft 21 is formed by the first arm portion 14a of the operation lever 14. It is blocked. At the end of the support member 20 opposite to the driver's seat 16, the ring-shaped gap between the support member 20 and the operation shaft 21 is closed by the stopper ring 23.
As a result, dust and the like are prevented from entering the gap between the support member 20 and the operation shaft 21 by the first arm portion 14a of the operation lever 14 and the stopper ring 23, and the needle bearing 22 is protected. ..

As shown in FIGS. 5 and 6, the first arm portion 14a and the second arm portion 14b of the operation lever 14 are arranged inside the operation panel 17. The third arm portion 14c of the operation lever 14 extends upward through the guide hole 17a of the operation panel 17, and the grip portion 14d of the operation lever 14 is arranged above the operation panel 17.

As shown in FIGS. 4, 5 and 6, the operating lever 14 can be swung around the swing shaft core P1 by holding the grip portion 14d of the operating lever 14 and operating it in the front-rear direction. The operating lever 14 can be operated to the cutting position AA, the first position A1 and the second position A2.

(Detailed structure of rotation angle detection sensor)
As shown in FIGS. 4 and 6, a channel-shaped support member 24 is connected to the support member 19 in a plan view, and a potentiometer-type rotation angle detection sensor 15 is laterally connected to the support member 24 by a bolt 25. ing.

As shown in FIG. 6, a recess 21a concentric with the swing shaft core P1 is formed at the end of the operation shaft 21 on the side opposite to the driver's seat 16. The detection shaft 15a of the rotation angle detection sensor 15 is inserted into the recess 21a of the operation shaft 21 and is connected to the operation shaft 21 via the connecting member 26.

As a result, as shown in FIGS. 4, 5 and 6, the detection shaft 15a of the rotation angle detection sensor 15 is arranged concentrically with the operation shaft 21, and the rotation angle detection sensor 15 is arranged on the swing shaft core P1. It is in a state of being. When the operating lever 14 is operated to the cutting position AA, the first position A1 and the second position A2, the detection shaft 15a of the rotation angle detection sensor 15 is rotated integrally with the operating lever 14 via the operating shaft 21.

As shown in FIG. 7, the rotation angles of the operation lever 14 and the operation shaft 21 are detected by the rotation angle detection sensor 15, and the detection signal of the rotation angle detection sensor 15 is input to the control device 13. Since the detection signal of the rotation angle detection sensor 15 includes the detection signals corresponding to the cutting position AA, the first position A1 and the second position A2, the control device 13 has the operating lever 14 at the cutting position AA and the first position. It is determined that the operation has been performed at A1 and the second position A2.
As a result, as described above, an operation command is output from the control device 13 to the electric motor 12, and the electric motor 12 operates the cutting clutch 10 and the threshing clutch 11 in the engaged state and the disengaged state.

(Detailed structure of detent mechanism)
The operating lever 14 as described above includes a detent mechanism 27 that holds the operating lever 14 at the cutting position AA, the first position A1, and the second position A2.

As shown in FIGS. 4, 5 and 6, the support portion 19a extends laterally from the lower portion of the support member 19 toward the operating lever 14. The detent plate 28 is connected to the support portion 19a of the support member 19 by a bolt 29, and the detent plate 28 is bent across the swing shaft core P1 to near the lower surface of the second arm portion 14b of the operating lever 14. It has been postponed.

As shown in FIGS. 4, 5 and 6, the upper side portion of the detent plate 28 is formed in an arc shape centered on the swing axis P1 in a side view, and three detent plate 28 upper side portions are formed. Recessed notches 28a, 28b, 28c are formed. The notch 28a of the detent plate 28 corresponds to the cut position AA, the notch 28b of the detent plate 28 corresponds to the first position A1, and the notch 28c of the detent plate 28 corresponds to the second position A2. There is.

As shown in FIGS. 4, 5 and 6, a cylindrical support member 30 is connected in the vertical direction to a portion of the second arm portion 14b of the operating lever 14 facing the upper side portion of the detent plate 28. .. The ball member 31 is movably and rotatably supported below the support member 30 along the support member 30, and the support member 30 is provided with a spring 32 that urges the ball member 31 to the protruding side. ..

As shown in FIGS. 4, 5 and 6, when the operating lever 14 is swung around the swing shaft core P1, the ball member 31 is in a state of moving on the upper side of the detent plate 28, and the ball member 31 is moved. 31 enters the cutouts 28a, 28b, 28c of the detent plate 28, and exits from the cutouts 28a, 28b, 28c of the detent plate 28.

As shown in FIGS. 4, 5 and 6, when the operating lever 14 is operated to the cutting position AA, the ball member 31 enters the notch 28a of the detent plate 28 and engages with the operating lever 14, so that the operating lever 14 moves to the cutting position AA. Is held in.
When the operating lever 14 is operated to the first position A1, the ball member 31 enters and engages with the notch 28b of the detent plate 28, so that the operating lever 14 is held at the first position A1.
When the operating lever 14 is operated to the second position A2, the ball member 31 enters and engages with the notch 28c of the detent plate 28, so that the operating lever 14 is held at the second position A2.

As described above, the detent mechanism 27 includes a detent plate 28, a support member 30, a ball member 31, and a spring 32.
As shown in FIGS. 4, 5 and 6, the detent mechanism 27 is located on the side of the operating lever 14 on the side where the second arm portion 14b extends with respect to the first arm portion 14a. On the other hand, it is in a state of being arranged in the region below the second arm portion 14b of the operating lever 14.

(Another Embodiment of the Invention)
In FIGS. 4, 5 and 6, the support member 30, the ball member 31 and the spring 32 may be laterally connected to the first arm portion 14a of the operating lever 14.
According to this structure, the cutout portions 28a, 28b, 28c of the detent plate 28 are abolished, and openings (shown) are provided at positions corresponding to the cut positions AA, the first position A1 and the second position A2 of the side surface portion of the detent plate 28. It is sufficient to form a detent. As a result, the ball member 31 enters and engages with the opening of the detent plate 28, so that the operating lever 14 is held at the cutting position AA, the first position A1, and the second position A2.

The bending structure of the operating lever 14 by the first arm portion 14a and the second arm portion 14b may be abolished so that the operating lever 14 connected to the operating shaft 21 extends straight upward.
According to this structure, the detection shaft 15a of the rotation angle detection sensor 15 may be connected to the end of the operation shaft 21 on the driver's seat 16 side (operation lever 14 side).

In the detent mechanism 27, the detent plate 28 may be provided on the operating lever 14, and the support member 30, the ball member 31, and the spring 32 may be provided on the support member 19.
According to this structure, the detent plate 28 is oscillated together with the operating lever 14 with respect to the position-fixed support member 30, the ball member 31, and the spring 32.

Not only the cutting unit 3, the threshing device 5, and the waste straw shredding device 6, but also the discharge clutch (not shown) that transmits and shuts off the power to the grain discharge device 8 by using the grain discharge device 8 as a working device is used as an actuator. It may be configured to operate in the on state and the off state.
According to this structure, an operating position corresponding to the discharge clutch is added to the operating lever 14 in addition to the cutting position AA, the first position A1 and the second position A2. If the working device is one of the grain discharging devices 8, two operating positions corresponding to the disengaging position and the engaging position of the discharging clutch are set with respect to the operating lever 14.

The swing shaft core P1 and the operation shaft 21 may be arranged sideways in the front-rear direction instead of sideways in the left-right direction.
According to this structure, since the operation lever 14 is operated in the left-right direction, the operation lever 14 may be provided on the operation panel on the front side of the driver's seat 16 instead of the operation panel 17 on the side of the driver's seat 16.

Instead of operating both the cutting clutch 10 and the threshing clutch 11 in the on and off states with one electric motor 12, each of the working devices may be provided with an actuator for changing the working state.
Instead of the electric motor 12, an electric cylinder (not shown) may be used as an actuator.

(Separate structure of operating lever)
Instead of the structure of the operating lever 14 shown in FIGS. 4, 5 and 6, the structure of the operating lever 51 shown in FIGS. 8, 9 and 10 can be considered.

As shown in FIGS. 8, 9 and 10, inside the operation panel 17, a flat plate-shaped support plate 40 is connected to a fixed frame (not shown), and the end portion of the support plate 40 is bent upward. Therefore, the vertical wall portion 40a is formed along the front-rear direction. The guide member 41 is connected along the vertical wall portion 40a of the support plate 40.
The two limit switches 52 and 53 are connected to the support plate 40 so as to be arranged in the front-rear direction, and the detection signals of the limit switches 52 and 53 are input to the control device 13 shown in FIG.

The angle-shaped support plate 42 is connected to the vertical wall portion 40a of the support plate 40, and the cylindrical support member 43 is connected to the support plate 42 in the left-right direction. The ball member 44 is movably and rotatably supported at the end of the support member 43 along the support member 43, and the support member 43 is provided with a spring 45 for urging the ball member 44 to the protruding side. There is.

An operation plate 46 formed by bending a plate material is provided. The operation plate 46 extends downward from the bottom plate portion 47, the vertical wall portion 48 extending upward from the bottom plate portion 47, the upper portion 49 extending laterally from the vertical wall portion 48, and the upper portion 49. It is provided with a vertical wall portion 50. The bottom plate portion 47 of the operation plate 46 is provided with an operation lever 51, and three openings 50a, 50b, and 50c are opened in the vertical wall portion 50 of the operation plate 46 at predetermined intervals.

The operation plate 46 is attached to the support plate 40 so that the upper side portion 49 and the vertical wall portions 48, 50 of the operation plate 46 are covered on the vertical wall portion 40a and the guide member 41 of the support plate 40 from above. The operation plate 46 is slidably supported in the front-rear direction along the vertical wall portion 40a of the support plate 40 and the guide member 41.

When the operation plate 46 is slid back and forth by the operation lever 51, the end 50d of the vertical wall portion 50 of the operation plate 46 comes into contact with or separates from the limit switches 52 and 53, and the limit switches 52 and 53 are turned on. It is operated to the state and the off state.
As a result, based on the detection signals of the limit switches 52 and 53, the electric motor 12 shown in FIG. 7 operates the cutting clutch 10 and the threshing clutch 11 in the on and off states as described below.

The state shown in FIGS. 8 and 10 is a state in which the operation lever 51 is operated to the cutting position AA, and the ball member 44 enters and engages with the opening 50a of the vertical wall portion 50 of the operation plate 46. The operating lever 51 is held at the cutting position AA.
In the state shown in FIGS. 8 and 10, the end portion 50d of the vertical wall portion 50 of the operation plate 46 is separated from both the limit switches 52 and 53, and both the limit switches 52 and 53 are in the off state. Both the cutting clutch 10 and the threshing clutch 11 are operated in the disengaged state.

When the operating lever 51 is operated to the first position A1, the ball member 44 enters and engages with the opening 50b of the vertical wall portion 50 of the operating plate 46, and the operating lever 51 is held at the first position A1.
In this state, the end portion 50d of the vertical wall portion 50 of the operation plate 46 comes into contact with the limit switch 52, and the limit switch 52 is operated in the turned-on state. As a result, the limit switch 52 is turned on, the limit switch 53 is turned off, and the threshing clutch 11 is turned on.

When the operating lever 51 is operated to the second position A2, the ball member 44 enters and engages with the opening 50c of the vertical wall portion 50 of the operating plate 46, and the operating lever 51 is held at the second position A2.
In this state, the end portion 50d of the vertical wall portion 50 of the operation plate 46 comes into contact with the limit switch 53, and the limit switch 53 is operated in the turned-on state. The limit switch is operated by the vertical wall portion 50 of the operation plate 46. 52 is maintained in the entered state. As a result, both the limit switches 52 and 53 are in the engaged state, and both the cutting clutch 10 and the threshing clutch 11 are operated in the engaged state.

The present invention includes not only self-removing combine harvesters, but also ordinary combine harvesters, sugar cane harvesters, corn harvesters, feed harvesters that harvest crops for roughage and mixed feed, shred them and pack them into rolls. It can also be applied to harvesters.

3, 5, 6 Working equipment 4 Driving unit 12 Actuator 14 Operating lever 14a 1st arm unit 14b 2nd arm unit 14d Gripping unit 15 Rotation angle detection sensor 17 Operation panel
21 Operation shaft 27 Detent mechanism AA, A1, A2 Operation position P1 Swing shaft core

Claims (1)

The operation shaft, which is located inside the operation panel of the operation unit and is rotatably supported around the lateral swing axis,
An operation lever arranged on the operation panel, connected to one end of the operation shaft, and commanding a change in the working state of the work device by a swing operation around the swing shaft core.
A rotation angle detection sensor arranged inside the operation panel, connected to the other end of the operation shaft, and detecting the rotation angle of the operation lever,
An actuator that changes the working state of the working device based on the detection signal of the rotation angle detection sensor is provided.
The rotation angle detection sensor is arranged on the swing axis by being connected to the opposite end of the operation lever on the operation shaft.
A detent mechanism for holding the operating lever at a plurality of operating positions is provided.
The grip portion, the first arm portion extending upward from the operation shaft, and the upper end portion of the first arm portion extending laterally on the opposite side of the rotation angle detection sensor to the operating lever and are connected to the grip portion. The second arm part is provided,
The detent mechanism is arranged in a region of the side of the first arm portion on the side where the second arm portion extends with respect to the first arm portion and in a region below the second arm portion. A harvester that engages with the first arm portion or the second arm portion to hold the operating lever in a position.

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