JP7203134B2 - combine - Google Patents

Description

The present invention comprises a feed chain for pinching and conveying harvested grain culms, a threshing device for threshing the harvested grain culms conveyed by the feed chain with a threshing drum, and a threshing device connected to the rear side of the threshing device and from the feed chain. The present invention relates to a combine harvester provided with a discharged straw conveying device for receiving discharged straw after threshing and holding and conveying the discharged straw rearward.

As the above combine, for example, the combine described in Patent Document 1 is already known. The combine described in Patent Document 1 includes a feed chain (“threshing feed chain” in the document) that pinches and conveys the harvested grain culms, and a handling cylinder (“processing cylinder” in the literature) that transports the harvested grain culms transported by the feed chain. A threshing device ("threshing machine" in the literature) that threshes by means of a threshing device, and a straw conveying device ( In the literature, it is provided with a "straw conveying device"). An upper cover (“handling cylinder cover” in the literature) is provided above the handling cylinder to cover the handling cylinder from above. The upper cover is configured to swing open and close with one side of the handling chamber as a fulcrum. The discharged straw conveying device is configured to open and close by swinging up and down with a rotation shaft in the front-rear direction as a fulcrum. According to such a configuration, the upper cover and the discharged straw conveying device are opened by swinging the upper cover and the discharged straw conveying device upward, so that maintenance work can be easily performed.

JP 2012-50339 A

In the combine disclosed in Patent Document 1, the upper cover and the discharged straw conveying device must be opened separately, which is troublesome.

In view of the above situation, there is a demand for a combine harvester whose upper cover and straw conveying device can be easily opened.

A feature of the present invention is
a feed chain for pinching and conveying harvested grain culms;
a threshing device for threshing the harvested grain culms conveyed by the feed chain with a threshing cylinder;
a harvested straw conveying device that is connected to the rear side of the threshing device and that receives the discharged straw after threshing processing from the feed chain and pinches and conveys it backward,
an upper cover that covers the handling cylinder from above;
an upper frame that supports the upper cover and is capable of swinging up and down around a swing axis extending in the longitudinal direction of the machine body;
While supporting the discharged straw conveying device, the swing axis is maintained between a lowered position where the discharged straw conveying device conveys the discharged straw and an elevated position where the discharged straw conveying device does not convey the discharged straw. a straw removal frame that can swing up and down around it;
Switching between a first state in which the upper frame and the straw removal frame can rise together to the same upper limit height and a second state in which the upper frame and the straw removal frame can rise to different upper limit heights . and a switching mechanism ,
In the second state, the limit height of the upper frame is set higher than the limit height of the straw frame .

According to this characteristic configuration, the switching mechanism switches the upper frame and the straw removal frame to a state in which the upper frame and the straw removal frame can be integrally raised to the same elevation limit height. can be integrally raised to the same elevation limit height. As a result, it is possible to easily open the upper cover and the discharged straw conveying device without the need to open the upper cover and the discharged straw conveying device separately. In addition, the upper frame and the straw removal frame are switched to a state in which the upper frame and the straw removal frame can be raised to different elevation limit heights by a switching mechanism, so that the upper frame and the straw removal frame are raised to different elevation limit heights. can be made Thereby, the upper cover and the straw conveying device can be opened to suitable heights respectively.

Furthermore, in the present invention,
a connection mechanism for releasably connecting the upper frame and the straw removal frame;
a first actuator for swinging the upper frame upward;
and a second actuator for swinging the straw removal frame upward.

According to this characteristic configuration, when the upper frame and the straw frame are connected by the connecting mechanism, the upper frame and the straw frame are swung upward by either one of the first actuator and the second actuator. can be made Further, in a state in which the connection between the upper frame and the straw removal frame is released, the upper frame can be swung upward by the first actuator, and the straw removal frame can be swung upward by the second actuator. can. In this way, it is possible to select whether to use either the first actuator or the second actuator, or to use both, depending on whether or not the upper frame and the straw frame are connected.

Furthermore, in the present invention,
In the second state, it is preferable that the limit height of the upper frame raised by the first actuator is set higher than the limit height of the straw frame raised by the second actuator.

As for the handling cylinder, it is easier to perform maintenance work if the upper cover is raised to a position as high as possible. According to this characteristic configuration, the upper frame is swung upward by the first actuator to a position higher than the upper limit height of the second actuator. It can be raised as high as possible.

Furthermore, in the present invention,
The second actuator is composed of a gas damper,
It is preferable that the upper frame is provided with a pressing portion that presses the straw frame from above.

According to this characteristic configuration, when the upper frame descends, the pressing section presses the straw frame from above, so that the gas damper can be automatically retracted.

It is a left view which shows a self-threshing combine. It is a top view which shows a self-threshing combine. It is a left view which shows a threshing device. It is a rear view showing the threshing device in a state in which the upper frame is lowered. It is a rear view which shows the threshing apparatus in the state which raised the upper frame. It is a top view which shows the rear part of a threshing device and a straw conveying device. It is a left side view which shows the rear part of a threshing apparatus and a straw conveying apparatus in the state which lowered the upper frame and the straw removal frame. It is a rear view showing the structure behind the threshing device in a state in which the upper frame and the straw removal frame are lowered. It is a rear view showing the structure behind the threshing device in a state in which the upper frame and the straw removal frame are raised. FIG. 10 is a rear view showing the straw conveying device with the upper frame and the straw frame lowered. FIG. 10 is a rear view showing the straw conveying device with the upper frame and the straw frame raised. Fig. 4 is an exploded perspective view showing the structure of the base end side of the straw frame. It is a left view which shows the structure of the base end side of a straw frame. FIG. 4 is an exploded perspective view showing an upper frame, a straw removal frame and a rear frame; It is a back sectional view showing a connection mechanism. FIG. 4 is a rear cross-sectional view showing the inner locking mechanism in an engaged state; FIG. 4 is a rear cross-sectional view showing the inner locking mechanism in a disengaged state; FIG. 4 is a rear cross-sectional view showing the outer locking mechanism in an engaged state; Fig. 10 is a rear cross-sectional view showing the outer locking mechanism in a disengaged state; It is a figure which shows a raising/lowering operation part. It is a left side view which shows the rear part of a threshing apparatus and a straw conveying apparatus in the state which raised the upper frame and the straw removal frame. Fig. 10 is a left side view showing the rear part of the threshing device and the straw conveying device in a state in which the upper frame is raised and the straw removal frame is lowered; It is a left side cross-sectional view showing the rear upper cover. It is a perspective view showing a rear upper cover. FIG. 10 is a diagram showing the upper limit height and rocking angle of the upper frame and straw removal frame, respectively; It is a figure which shows the raising/lowering mechanism of the upper frame and straw removal frame which concern on a 1st other example. In the first alternative example, it is a diagram showing a state in which the upper frame and the straw frame are lifted to the same limit height. In the first alternative example, it is a diagram showing a state in which the upper frame and the straw frame are raised to different elevation limit heights. It is a figure which shows the raising/lowering mechanism of the upper frame and straw removal frame which concern on a 2nd other example. FIG. 10 is a diagram showing a state in which the upper frame and the straw frame are lifted to the same limit height in the second alternative example. In a second alternative example, it is a diagram showing a state in which the upper frame and the straw frame are raised to different elevation limit heights. FIG. 11 is a rear cross-sectional view showing an engaged state of an outer lock mechanism according to another embodiment; FIG. 11 is a rear cross-sectional view of an outer locking mechanism according to another embodiment, showing a disengaged state; It is a perspective view which shows the straw frame which concerns on another embodiment.

[Overall configuration of combine harvester]
1 and 2 show a self-threshing combine. This combine has a body frame 1 and a traveling device 2 that supports the body frame 1. - 特許庁A driving cabin 3 is provided on the right side of the front part of the fuselage. The driving cabin 3 includes a driving section 4 in which a driver rides and a cabin 5 covering the driving section 4. - 特許庁An engine (not shown) is provided below the operation unit 4 .

A harvesting unit 6 for harvesting crops in the field is provided in front of the driving cabin 3 . A grain storage tank 7 for storing grains is provided behind the operating cabin 3 . A grain discharging device 8 for discharging grains in the grain storage tank 7 is provided. A feed chain 9 for pinching and conveying harvested grain culms is provided on the left side of the machine body. A threshing device 10 is provided on the left side of the grain storage tank 7 . The threshing device 10 threshes harvested grain culms conveyed by the feed chain 9 with a threshing cylinder 11 . On the rear side of the threshing device 10, a straw conveying device 12 is connected. The discharged straw conveying device 12 receives the discharged straw after threshing from the feed chain 9 and pinches and conveys it rearward.

[Harvesting Department]
The harvesting unit 6 is configured for multiple cutting specifications (for example, six-row cutting specifications). The harvesting unit 6 includes a plurality of (for example, seven) weed dividing tools 13 , a plurality of (for example, six) raising devices 14 , a cutting device 15 , and a conveying device 16 . The weeding tool 13 divides the crops in the field. A triggering device 14 triggers the divided crop. A cutting device 15 cuts the raised crop. The conveying device 16 conveys the harvested crops backward toward the threshing device 10 .

[Threshing equipment, etc.]
As shown in FIG. 3, a threshing chamber 17 is formed in the upper portion of the threshing device 10 . A handling cylinder 11 is provided in the handling chamber 17 . The handling cylinder 11 is rotatable around a rotation axis Y1 extending in the longitudinal direction of the machine body. A receiving net 18 is provided below the handling cylinder 11 . A dust discharge fan 19 for discharging dust to the outside is provided behind the handling chamber 17 .

At the bottom of the threshing device 10, there are a rocking sorting device 20 that sifts and sorts the objects to be sorted while transferring them to the rear of the machine body, a winnow 21 that blows sorting air to the rocking sorting device 20, and the first grain (single grain). There are provided a first recovery section 22 for recovering hardened grains, etc., and a second recovery section 23 for recovering secondary grains (eg, grains with branch stems).

The first collecting part 22 is provided with the first screw 24 for conveying the first grain to the right. The right end of the first screw 24 is interlocked with a grain lifting device 25 for lifting and conveying the first grain to the grain storage tank 7 .

The second recovery part 23 is provided with a second screw 26 for conveying the second grain to the right. The right end of the second screw 26 is interlocked with a second reducing device 27 that returns the second grain to the swing sorting device 20 .

A waste straw cutting device 28 for cutting the waste straw conveyed by the waste straw conveying device 12 is provided below the rear portion of the waste straw conveying device 12 . A cover 29 is provided to cover the discharged straw cutting device 28 . A switching plate 29a is provided in a portion of the cover 29 located above the discharged straw cutting device 28 . The switching plate 29a can be opened and closed by swinging between a cutting position on the rising side and a non-cutting position on the lowering side about a swing axis extending in the lateral direction of the machine body. The discharged straw conveyed by the discharged straw conveying device 12 is thrown into the discharged straw cutting device 28 with the switching plate 29a opened (in the cutting position). With the switching plate 29a closed (non-cutting position), the straw transported by the straw transporting device 12 slides on the upper surface of the switching plate 29a and falls to the ground.

As shown in FIGS. 3 to 7, walls 30 are provided at the front and rear ends of the handling chamber 17, respectively. The front wall portion 30 constitutes the front wall portion of the handling chamber 17 . A rear wall portion 30 constitutes a rear wall portion of the handling chamber 17 . The wall portion 30 has a movable wall 31 and a fixed wall 32 . The movable wall 31 rotatably supports the handling cylinder 11 through the handling cylinder shaft 11a. A connecting arm 33 is provided across the movable wall 31 and the fixed wall 32 to connect them. The movable wall 31 is supported by the fixed wall 32 via a connecting arm 33 so as to be vertically swingable about a swing axis Y2 extending in the longitudinal direction of the machine body. A transmission shaft 34 to which the power of the engine is transmitted is provided across the fixed wall 32 on the front side and the fixed wall 32 on the rear side.

The right side of the threshing device 10 is constituted by a right side wall 35 . The right side wall 35 extends to the rear end of the fuselage. The right side wall 35 has an inclined portion 35a. The inclined portion 35a is located on the rear side of the rear wall portion 30 and is inclined so as to be positioned toward the center of the left and right sides of the fuselage toward the rear side.

Front and rear frames 36L and 36R extending in the front and rear direction of the machine body are provided on both left and right sides of the threshing device 10, respectively. The left front-rear frame 36L extends to the rear side of the rear end of the handling cylinder 11. - 特許庁The left front-rear frame 36L is composed of a rectangular pipe having a substantially square cross-sectional shape. The right front-rear frame 36R extends to the rear side of the rear end of the handling cylinder 11. - 特許庁The right front-rear frame 36</b>R supports the front fixed wall 32 , the rear fixed wall 32 and the right side wall 35 . The right front-rear frame 36R is formed of a square pipe having a substantially rectangular cross-sectional shape (horizontally long substantially rectangular shape).

[Rear frame]
A rear frame 37 is provided on the rear upper part of the fuselage. The rear frame 37 is positioned outside the body of the threshing device 10 in the lateral direction of the body. The rear frame 37 is formed in a substantially U shape protruding rearward from the rear part of the threshing device 10 in a side view. The rear frame 37 is made up of round pipes.

[Upper cover]
An upper cover 38 is provided to cover the handling cylinder 11 from above. The upper cover 38 extends above the rear portion of the discharged straw conveying device 12 on the rear side of the rear end of the handling cylinder 11 . An upper right cover 39 is provided on the right side of the upper cover 38 . The upper right cover 39 extends above the rear of the discharged straw conveying device 12 on the rear side of the rear end of the handling cylinder 11 . The upper right cover 39 is supported by the right front-and-rear frame 36R so as to be vertically swingable about a swing axis extending in the front-and-rear direction of the machine body.

[Upper frame]
The upper cover 38 is supported by the upper frame 40 . The upper frame 40 can swing up and down around a transmission shaft 34 extending in the longitudinal direction of the machine body. The upper frame 40 is supported by the front wall 30 and the rear wall 30 via the transmission shaft 34 so as to be vertically swingable about the swing axis Y2. The upper frame 40 includes a pair of front and rear movable walls 31 and a left front and rear frame 36L. The left front-rear frame 36L is positioned outside the body in the left-right direction of the upper frame 40 .

A hydraulic cylinder 41 is provided to swing the upper frame 40 upward. The hydraulic cylinder 41 is provided across the movable wall 31 on the rear side and the fixed wall 32 on the rear side. The hydraulic cylinder 41 is configured by, for example, a double-acting hydraulic cylinder. However, the hydraulic cylinder 41 may be composed of a single-acting hydraulic cylinder.

[Handling barrel lock mechanism]
The handling cylinder 11 can be swung upward together with the upper frame 40 by a hydraulic cylinder 41 . A threshing cylinder lock mechanism 42 is provided for holding the threshing cylinder 11 at a threshing position for threshing. The handling cylinder lock mechanism 42 includes a pair of front and rear hook plates 43 and a pair of front and rear handling cylinder hook pins 44 . A hook plate 43 is supported by each of the front wall portion 30 and the rear wall portion 30 so as to be swingable about the swing axis Y3 in the longitudinal direction of the machine body. A hook portion 43 a that can be engaged with the handling drum hook pin 44 is provided at the tip portion of the hook plate 43 . By engaging the hook portion 43a with the threshing cylinder hook pin 44, the threshing cylinder 11 is held at the threshing processing position. When the hook portion 43 a is disengaged from the handling cylinder hook pin 44 , the handling cylinder 11 swings upward together with the upper frame 40 by the hydraulic cylinder 41 . A motor M for swinging the pair of front and rear hook plates 43 is supported on the rear surface of the rear wall portion 30 . A pair of front and rear hook plates 43 are swung by the motor M to the engagement side and the engagement release side.

[Straw conveying device]
As shown in FIGS. 6 and 7, the discharged straw conveying device 12 is provided in an inclined state so as to be positioned toward the center of the left and right sides of the machine body toward the rear side. The discharged straw conveying device 12 includes a stock base conveying device 45 for clamping and conveying the base side of the discharged straw, and a tip conveying device 46 for locking and conveying the tip side of the discharged straw. The stock base conveying device 45 includes a straw removal chain 47 with projections 47 a and a straw removal rail 48 . The straw removal rail 48 is arranged below the straw removal chain 47 so as to face the lower path of the straw removal chain 47 . The tip conveying device 46 includes a straw tip chain 49 with tines 49a.

The straw conveying device 12 is supported by the straw frame 50 . The straw conveying device 12 is removable from the straw frame 50 . The straw conveying device 12 is suspended from the straw frame 50 via a front stay 51 and a rear stay 52 . The straw conveying device 12 is detachably bolted to the front stay 51 . The straw conveying device 12 is detachably bolted to the rear stay 52 .

A discharged straw conveying space S of the discharged straw conveying device 12 is formed behind the wall portion 30 on the rear side. The straw transport space S is formed so as to straddle the straw frame 50 in the longitudinal direction of the machine body. In plan view, the straw transport space S spreads so as to be positioned toward the center of the left and right sides of the machine body as it moves downstream in the transport direction in the front-back halfway portion of the waste straw transport space S (the location corresponding to the front end of the inclined portion 35a).

[Belt transmission mechanism]
As shown in FIGS. 6, 8 and 9, a belt transmission mechanism 53 for transmitting the power of the transmission shaft 34 to the straw conveying device 12 is provided across the transmission shaft 34 and the straw conveying device 12. . The belt transmission mechanism 53 includes a drive pulley 54 , a driven pulley 55 and a transmission belt 56 . The drive pulley 54 is fixed to a portion of the transmission shaft 34 that protrudes rearward from the fixed wall 32 on the rear side. The driven pulley 55 is fixed to an input shaft (not shown) of the straw conveying device 12 . The transmission belt 56 is wound around the drive pulley 54 and the driven pulley 55 .

[Tension clutch mechanism]
A tension clutch mechanism 57 is provided for switching the belt transmission mechanism 53 between a transmission state in which power is transmitted to the discharged straw conveying device 12 and an interrupted state in which transmission of power to the discharged straw conveying device 12 is interrupted. The tension clutch mechanism 57 has a first tension arm 58 , a first tension roller 59 , a second tension arm 60 , a second tension roller 61 and a tension spring 62 . The first tension arm 58 is rotatably supported on the transmission shaft 34 . A first tension roller 59 is rotatably supported at the tip of the first tension arm 58 . The first tension roller 59 is in contact with the portion of the transmission belt 56 corresponding to the lower path from above. A base end portion of the first tension arm 58 is provided with a mounting portion 63 to which a tension spring 62 is mounted.

The second tension arm 60 is fixed to the first tension arm 58 so as to be rotatable together with the first tension arm 58 . A second tension roller 61 is rotatably supported at the tip of the second tension arm 60 . The second tension roller 61 contacts a portion of the transmission belt 56 corresponding to the upper path from above.

The tension spring 62 urges the first tension arm 58 and the second tension arm 60 to swing about the swing axis Y2 in the tension application direction. An end portion of the tension spring 62 opposite to the attachment portion 63 is attached to a rod 64 . The rod 64 is supported by the stay 65 so that its position can be adjusted. The stay 65 is fixed (for example, fixed by welding) to the straw removal frame 50 (front frame 67). By adjusting the position of the rod 64 with respect to the stay 65, the biasing force of the tension spring 62 changes.

[Straw frame]
As shown in FIGS. 6 to 11 , the straw frame 50 supports the front and rear parts of the straw conveying device 12 via front stays 51 and rear stays 52 . The discharged straw frame 50 is formed in a frame shape. The straw removal frame 50 includes a base end frame 66 , a front frame 67 , a rear frame 68 and a free end frame 69 . A front frame 67, a rear frame 68 and a free end frame 69 are formed by bending one round pipe. A front portion of the discharged straw conveying device 12 is supported by the free end frame 69 via the front stay 51 . The rear portion of the discharged straw conveying device 12 is supported by a portion of the rear frame 68 on the left-right center side of the machine body via the rear stay 52 .

The straw frame 50 swings up and down around the swing axis Y2 between a lowered position where the straw conveying device 12 conveys the discharged straw and an elevated position where the straw conveying device 12 does not convey the discharged straw. is movable. The straw removal frame 50 can swing up and down around a support shaft 70 extending in the longitudinal direction of the machine body. A pair of front and rear gas dampers 71 for swinging the straw discharge frame 50 upward is provided. The gas damper 71 is provided across the straw extraction frame 50 (front frame 67 ) and the lower stay 72 . An upper stay 73 to which the gas damper 71 is connected is fixed (for example, fixed by welding) to the front frame 67 .

As shown in FIGS. 12 to 14, the proximal frame 66 is provided on the proximal side of the straw frame 50 and extends in the longitudinal direction of the machine body. The base end frame 66 includes a front side frame portion 74 constituting the front side, a rear side frame portion 75 constituting the rear side, and a connecting frame portion extending between the front side frame portion 74 and the rear side frame portion 75. 76 and . A front side portion (front side frame portion 74 ) of the base end frame 66 is supported by the support shaft 70 via a pair of front and rear stays 77 .

A portion of the proximal end frame 66 corresponding to the connecting frame portion 76 is formed with a stepped portion 66a that drops downward. The connecting frame portion 76 includes a grooved plate 78 opening downward and a connecting plate 79 . The grooved plate 78 is provided across the lower surface of the front frame portion 74 and the lower surface of the rear frame portion 75 . Inside the grooved plate 78, a connecting plate 79 is provided across the left side wall and the right side wall of the grooved plate 78 to connect them.

The front frame 67 is connected to the front end portion of the base end frame 66 and extends outward from the support shaft 70 in the left-right direction of the machine body. The rear frame 68 is connected to the rear end portion of the base end frame 66 and extends from the spindle 70 side toward the outside of the machine body in the left-right direction of the machine body.

The free end frame 69 is provided on the free end side of the straw removal frame 50 and extends in the longitudinal direction of the machine body. The free end frame 69 is connected to the outer end of the front frame 67 in the lateral direction of the fuselage and to the outer end of the rear frame 68 in the lateral direction of the fuselage. In the lowered position, the free end frame 69 extends along the left front-rear frame 36L and is adjacent to the left front-rear frame 36L while being positioned right next to the left front-rear frame 36L.

The support shaft 70 is a separate shaft from the transmission shaft 34 and is supported by the right front-rear frame 36R that supports the transmission shaft 34 . The transmission shaft 34 and the support shaft 70 are arranged on the same axis (swing axis Y2). The support shaft 70 is arranged on the front side of the front-back halfway portion of the discharged straw conveying space S (the portion corresponding to the front end of the inclined portion 35a). The right front-rear frame 36R extends to the rear side of the support shaft 70 . The support shaft 70 is supported by a bracket 81 via a pair of front and rear stays 80 . The bracket 81 is vertically provided on the lower surface of the right front-rear frame 36R. The stay 80 is bolted to the bracket 81 . A lower stay 72 is supported by the front stay 80 .

[Positioning mechanism]
As shown in FIG. 14, when the straw removal frame 50 is positioned at the lowered position, the free end side of the straw removal frame 50 (free A positioning mechanism 82 is provided for positioning the end frame 69 ) on the rear frame 37 . The positioning mechanism 82 includes a claw portion 83 and an insertion receiving portion 84 into which the claw portion 83 is inserted. The claw portion 83 is supported by the free end frame 69 via a stay 85 . The claw portion 83 is detachably fixed to the stay 85 with a bolt 86 . The inserted portion 84 is fixed (for example, fixed by welding) to the rear frame 37 . By inserting the claw portion 83 into the inserted portion 84, the straw removal frame 50 is not displaced in the state where the straw removal frame 50 is positioned at the lowered position (positional displacement in the longitudinal direction of the machine body, etc.). The free end side of 50 (free end frame 69 ) is positioned on the rear frame 37 .

[Coupling mechanism]
As shown in FIGS. 14 and 15, a connection mechanism 87 is provided for releasably connecting the upper frame 40 (left front-back frame 36L) and the straw extraction frame 50 (free end frame 69). The connecting mechanism 87 can connect the left front-rear frame 36L and the end portion (free end frame 69) of the straw removal frame 50 on the outer side of the machine body in the horizontal direction of the machine body. The connecting mechanism 87 is provided over the upper portion of the left front-rear frame 36</b>L and the upper portion of the free end frame 69 . The connecting mechanism 87 includes an upper fixing bracket 88 , a straw-side fixing bracket 89 , and a connecting bracket 90 . The upper fixing bracket 88 is fixed (for example, fixed by welding) to the left front-rear frame 36L. The straw-side fixing bracket 89 is fixed (for example, fixed by welding) to the front portion of the free end frame 69 . The connecting bracket 90 is provided over the upper surface of the upper side fixing bracket 88 and the upper surface of the discharged straw side fixing bracket 89 . The connecting bracket 90 is detachably connected to each of the upper fixing bracket 88 and the straw-side fixing bracket 89 by bolts 91 . That is, the connecting mechanism 87 can be disconnected from the left front-rear frame 36L and the free end frame 69, respectively.

[Inside lock mechanism]
As shown in FIGS. 16 and 17, in a state in which the straw removal frame 50 is positioned at the lowered position, the base end side (base end frame 66) of the straw removal frame 50 is positioned and held by the right front-back frame 36R. A locking mechanism 92 is provided. The inner lock mechanism 92 positions and holds the rear portion of the proximal end frame 66 to the right front-rear frame 36R. The inner lock mechanism 92 has an inner hook 93 and an inner hook pin 94 .

The inner hook 93 is detachably fixed to the right side wall of the connecting frame portion 76 (channel plate 78 ) of the base end frame 66 with a bolt 95 . The inner hook 93 has a pair of front and rear hook portions 93a. A connecting plate 93b is provided across the hook portion 93a on the front side and the hook portion 93a on the rear side to connect them.

The inner hook pin 94 is supported by the right front-rear frame 36R via a first stay 96 and a second stay 97 . The first stay 96 is fixed (for example, fixed by welding) to the right front-rear frame 36R. The second stay 97 is detachably fixed to the first stay 96 with bolts 98 . The inner hook pin 94 is provided across the front wall portion and the rear wall portion of the second stay 97 .

[Operation of inner lock mechanism]
The inner lock mechanism 92 follows the swinging of the straw removal frame 50 to the lowered position side, engages with the right front-rear frame 36R, and causes the straw removal frame 50 to swing to the raised position side. to release the engagement with the right front-rear frame 36R.

More specifically, the inner hook 93 engages the inner hook pin 94 as the straw frame 50 swings toward the lowered position. Then, the engagement of the inner hook 93 with the inner hook pin 94 is released following the swinging of the straw discharge frame 50 to the raised position side. Here, when the straw removal frame 50 swings from the lowered position toward the raised position, the inner hook pin 94 enters the stepped portion 66a. As a result, the base end frame 66 does not interfere with the inner hook pin 94 when the straw frame 50 swings up and down.

[Outer lock mechanism]
As shown in FIGS. 18 and 19, the outer lock mechanism 100 positions and holds the free end side (free end frame 69) of the straw discharge frame 50 on the rear frame 37 when the straw discharge frame 50 is positioned at the lowered position. is provided. The outer lock mechanism 100 has an outer hook 101 and an outer hook pin 102 . The outer hook 101 includes a base portion 101a and a hook portion 101b. The hook portion 101b is detachably fixed to the base portion 101a by a bolt 103. As shown in FIG.

The outer hook pin 102 is located on the left side of the rear frame 37 and slightly away from the rear frame 37 . The outer hook pin 102 is supported by the rear frame 37 via a first stay 104 and a second stay 105 (see FIG. 14).

The outer lock mechanism 100 positions and holds the rear portion of the left front-rear frame 36</b>L on the rear frame 37 . The left front-rear frame 36L and the rear frame 37 are detachably connected by an outer lock mechanism 100. As shown in FIG. With the left front-rear frame 36L and the rear frame 37 connected by the outer lock mechanism 100, the rear frame 37 is positioned to the right of the left front-rear frame 36L. That is, the rear frame 37 is provided with a portion adjacent to the left front-rear frame 36L while being connected to the left front-rear frame 36L by the outer lock mechanism 100 . With the left front-rear frame 36L and the rear frame 37 connected by the outer lock mechanism 100, the free end frame 69 is in contact with the rear frame 37 in the vertical direction. Specifically, the free end frame 69 is in contact with the rear frame 37 from above while the left front-rear frame 36L and the rear frame 37 are connected by the outer lock mechanism 100 . That is, the free end frame 69 is vertically sandwiched between the rear frame 37 and the connecting mechanism 87 (straw-side fixing bracket 89) (sandwich structure).

[Link mechanism]
As shown in FIGS. 6 to 9, a link mechanism 106 is provided for interlocking the handling cylinder lock mechanism 42 (rear hook plate 43) and the outer lock mechanism 100 (outer hook 101). The link mechanism 106 has a first link arm 107 , a second link arm 108 and a link rod 109 . The first link arm 107 is connected to the base end of the hook plate 43 on the rear side so as to be capable of relative rocking. The first link arm 107 and the second link arm 108 are connected so as to be relatively swingable.

The link rod 109 is supported by the left front-rear frame 36</b>L via a front stay 110 and a rear stay 111 . The link rod 109 is rotatably supported by the front stay 110 and the rear stay 111 . A second link arm 108 is connected to the front end of the link rod 109 so as to be relatively unmovable. The outer hook 101 is connected to the rear end of the link rod 109 so as not to relatively swing.

[Up-and-down operation part]
As shown in FIG. 20 , an elevation operation section 112 for elevation operation is provided in the operation section 4 . The elevation operation unit 112 includes a power switch 113 , an elevation switch 114 and a descent switch 115 . When performing the raising operation, the raising switch 114 and the power switch 113 are pressed at the same time. The raising operation is performed only while the raising switch 114 and the power switch 113 are pressed simultaneously. When descending, the descending switch 115 and the power switch 113 are pressed simultaneously. The lowering operation is performed only while the lowering switch 115 and the power switch 113 are pressed simultaneously. In addition to the operation unit 4 (or instead of the operation unit 4), the lifting operation unit 112 may be provided, for example, on the left side of the threshing apparatus 10 so that the operator can operate it from outside the machine.

[Rear upper cover]
As shown in FIGS. 2, 6, 23 and 24, a rear upper cover 116 is provided to cover the discharged straw conveying device 12 from the rear upper side. The rear top cover 116 has a body portion 117 and an upper portion 118 .

The body portion 117 has a notch portion 117a that opens forward. The notch 117a is formed in a laterally elongated substantially trapezoidal shape in a plan view. The length of the front edge of the notch 117a (the length in the left-right direction of the machine body) is longer than the length of the rear edge of the notch 117a (the length in the left-right direction of the machine body).

The upper portion 118 is positioned above the rear portion of the straw conveying device 12 in the rear upper cover 116 . The upper portion 118 overlaps the rear portion of the discharged straw conveying device 12 in plan view. The upper portion 118 is provided within the notch 117a so as to block the notch 117a. The upper portion 118 is supported by the main body portion 117 so as to be vertically swingable via a support shaft 119 extending in the left-right direction of the vehicle body on the rear side of the upper portion 118 . The upper portion 118 swings up and down around a support shaft 119 extending in the lateral direction of the machine body on the rear side of the upper portion 118 between a closed position for closing the straw conveying space S and an open position for opening the straw conveying space S. It is possible.

[Interlocking mechanism]
An interlocking mechanism 120 is provided for swinging the upper portion 118 to the open position side in conjunction with the swinging of the straw discharge frame 50 to the raised position side. The interlocking mechanism 120 includes an arm 121 and rollers 122 . Arm 121 extends from straw removal frame 50 (rear frame 68 ) to a lower portion of upper portion 118 . A roller 122 is provided at the tip of the arm 121 and can contact the contact portion 126c from below. The roller 122 is rotatable around a rotation axis extending in the longitudinal direction of the machine body. Arm 121 is detachably fixed to arm stay 123 by bolt 124 . The arm stay 123 is fixed (for example, fixed by welding) to the rear frame 68 .

A main body stay 125 is bolted to the inner surface of the main body 117 . An upper portion stay 126 is fixed (for example, fixed by welding) to the inner surface portion of the upper portion 118 . A support shaft 119 is provided across the body stay 125 and the upper stay 126 . The upper part stay 126 includes a pair of left and right support portions 126a that support the support shaft 119, an attachment portion 126b to which the spring 127 is attached, and a contact portion 126c with which the roller 122 can contact. The contact portion 126c is formed of a plate-like portion extending along the inner surface of the upper portion 118 in the lateral direction of the aircraft.

A spring 127 is provided to urge the upper portion 118 to swing toward the closed position. A spring 127 is provided across the upper portion 118 and the body portion 117 . The end of the spring 127 on the side of the upper portion 118 is attached to the attachment portion 126b. The body portion 117 is provided with a mounting portion 128 to which the spring 127 is mounted. An end portion of the spring 127 on the main body portion 117 side is attached to an attachment portion 128 .

The upper portion 118 is formed in a shape slightly larger than the notch 117a in plan view. The edge of the upper portion 118 abuts against the edge of the body portion 117 corresponding to the notch portion 117a from above, thereby preventing the upper portion 118 from swinging downward from the closed position. . That is, the edge of the upper portion 118 and the edge of the body portion 117 corresponding to the notch portion 117a form a blocking portion 129 that prevents the upper portion 118 from swinging downward from the closed position. ing.

[Up-and-down operation of the upper frame and the straw removal frame]
As shown in FIGS. 8 and 9, when the operator performs a lifting operation using the lifting operation section 112, the motor M swings the pair of front and rear hook plates 43 toward the disengagement side. As a result, the hook plate 43 (hook portion 43a) is disengaged from the handling cylinder hook pin 44. As shown in FIG. Then, the outer hook 101 swings toward the disengagement side in conjunction with the swinging toward the disengagement side of the hook plate 43 on the rear side.

In the connected state where the upper frame 40 and the straw removal frame 50 are connected by the connecting mechanism 87, as shown in FIGS. The frame 40 and straw frame 50 are swung upward by the hydraulic cylinder 41 . At that time, the handling drum 11 , the belt transmission mechanism 53 , and the tension clutch mechanism 57 are also swung upward by the hydraulic cylinder 41 together with the upper frame 40 and the straw removal frame 50 . Therefore, the positional relationship of the pulleys (driving pulley 54 and driven pulley 55) in the belt transmission mechanism 53 does not change.

Then, the engagement of the inner hook 93 with the inner hook pin 94 is released following the swinging of the straw discharge frame 50 to the raised position side. In this way, the upper frame 40 and the straw frame 50 are integrally raised to the same limit height.

Further, when the straw removal frame 50 swings to the raised position side, the arm 121 pushes up the upper portion 118 via the roller 122 in conjunction with the swinging of the straw removal frame 50 to the raised position side. In this manner, the upper portion 118 swings toward the open position in conjunction with the swinging of the straw discharge frame 50 toward the raised position.

Then, when the worker performs a lowering operation using the lifting operation section 112, the upper frame 40 and the straw-discharging frame 50 are swung downward as the hydraulic cylinder 41 retracts. Then, the inner hook 93 engages with the inner hook pin 94 following the swinging of the straw discharge frame 50 toward the lowered position.

Then, when the upper frame 40 and the straw removal frame 50 are positioned at the lowered position, the motor M swings the pair of front and rear hook plates 43 toward the engaging side. As a result, the hook plate 43 (hook portion 43 a ) engages with the handling cylinder hook pin 44 . Then, the outer hook 101 swings toward the engaging side in conjunction with the swinging of the hook plate 43 on the rear side toward the engaging side.

On the other hand, in a state where the connection between the upper frame 40 and the straw frame 50 is released (disconnected state), as shown in FIG. Only the upper frame 40 of the frame 40 and the straw straw frame 50 is swung upward by the hydraulic cylinder 41 . At that time, the handling cylinder 11 and the tension clutch mechanism 57 are also swung upward by the hydraulic cylinder 41 together with the upper frame 40 . In addition, when only the upper frame 40 of the upper frame 40 and the discharged straw frame 50 is to be swung upward, it is necessary to remove the transmission belt 56 from the drive pulley 54 in advance. In this way, only the upper frame 40 of the upper frame 40 and the straw straw frame 50 rises to the upper limit height.

Then, by swinging the straw removal frame 50 upward by the gas damper 71, the straw removal frame 50 rises to the upper limit height. As described above, while the straw conveying device 12 is detachable from the straw frame 50, if the straw conveying device 12 is removed from the straw conveying device 12, only the straw frame 50 is swung upward. be able to.

Next, a state in which the upper frame 40 and the straw frame 50 can rise together to the same height limit height (hereinafter referred to as "first mode"), and a state in which the upper frame 40 and the straw straw frame 50 have different height limits. 25 to 31, an embodiment capable of switching to a state capable of rising to a height (hereinafter referred to as "second mode") will be described.

As shown in FIG. 25, in the first mode, the upper limit height of the upper frame 40 and the upper limit height of the straw frame 50 are set to the same upper limit height H1. Further, the swing angle of the upper frame 40 and the swing angle of the straw frame 50 are set to the same swing angle α.

In the second mode, the upper limit height of the upper frame 40 and the upper limit height of the straw frame 50 are set to different upper limit heights. Specifically, the upper limit height of the upper frame 40 is set to the upper limit height H1, and the upper limit height of the discharged straw frame 50 is lower than the upper limit height H1 (elevation It is set to the limit height H2). That is, the limit height H1 for raising the upper frame 40 by the hydraulic cylinder 41 is set higher than the limit height H2 for raising the straw frame 50 by the gas damper 71 .

Further, the swing angle of the upper frame 40 and the swing angle of the straw frame 50 are set to different swing angles. Specifically, the swing angle of the upper frame 40 is set to the swing angle α, and the swing angle of the straw frame 50 is smaller than the swing angle α (swing angle β). is set to

In the examples shown in FIGS. 26 to 28, the elevating mechanism for the upper frame 40 and the straw removal frame 50 includes a hydraulic cylinder 41 for swinging the upper frame 40 upward and a gas damper 71 for swinging the straw removal frame 50 upward. , and a connecting mechanism 87 that connects the upper frame 40 and the straw straw frame 50 so as to be detachable. In the examples shown in FIGS. 26 to 28, the connecting mechanism 87 functions as a switching mechanism that switches between the first mode and the second mode. FIG. 26 shows a state in which the upper frame 40 and the straw removal frame 50 are positioned at the lowered position.

As shown in FIG. 27, in the first mode, the upper frame 40 and the straw frame 50 are connected by the connecting mechanism 87 (connected state). In this connected state, the upper frame 40 and the straw frame 50 are swung upward by the hydraulic cylinder 41 so that the upper frame 40 and the straw frame 50 are integrally raised to the same elevation limit height H1.

In this case, by disconnecting the gas damper 71 and the straw discharge frame 50 in advance, the straw discharge frame 50 exceeds the maximum extension length of the gas damper 71 (corresponding to the upper limit height H2). The gas damper 71 will not be damaged even if it rises to the upper limit height H1.

As shown in FIG. 28, in the second mode, the connection between the upper frame 40 and the straw frame 50 is released (disconnected state). In this disconnection state, the upper frame 40 is swung upward by the hydraulic cylinder 41 so that the upper frame 40 rises to the upper limit height H1.

Then, the straw-extracted frame 50 can be swung upward by the gas damper 71 so that the straw-extracted frame 50 rises to the upper limit height H2.

As shown in FIGS. 29 to 31, the upper frame 40 is provided with a pressing portion 40a for pressing the straw discharge frame 50 from above. may be placed above the gas damper 71 so as to be separable. In the examples shown in FIGS. 29 to 31 as well, the connecting mechanism 87 functions as a switching mechanism for switching between the first mode and the second mode. FIG. 29 shows a state in which the upper frame 40 and the straw removal frame 50 are positioned at the lowered position.

As shown in FIG. 30, in the first mode, the upper frame 40 and the straw frame 50 are connected by the connecting mechanism 87 (connected state). In this connected state, the upper frame 40 and the straw frame 50 are swung upward by the hydraulic cylinder 41 so that the upper frame 40 and the straw frame 50 are integrally raised to the same elevation limit height H1.

At this time, as described above, the straw removal frame 50 is placed on the end portion of the gas damper 71 on the side of the straw removal frame 50 so as to be separated upward from the gas damper 71 , so that the straw removal frame 50 is placed on the gas damper. 71 (corresponding to the limit height H2), the straw frame 50 is separated upward from the gas damper 71. As shown in FIG. As a result, even if the straw straw frame 50 rises to the height limit height H1 beyond the maximum extension length (corresponding to the height limit height H2) of the gas damper 71, the gas damper 71 will not be damaged.

As shown in FIG. 31, in the second mode, the connection between the upper frame 40 and the straw frame 50 is released (disconnected state). In this disconnection state, the upper frame 40 is swung upward by the hydraulic cylinder 41 so that the upper frame 40 rises to the upper limit height H1.

Then, the straw-extracted frame 50 can be swung upward by the gas damper 71 so that the straw-extracted frame 50 rises to the upper limit height H2.

After that, when the upper frame 40 descends, the straw frame 50 descends together with the upper frame 40 as the gas damper 71 automatically contracts due to the holding part 40a pressing the straw extraction frame 50 from above. .

In the examples shown in FIGS. 26 to 28 and the examples shown in FIGS. 29 to 30, a locking mechanism (not shown) for holding the straw frame 50 on the rear frame 37 may be provided. Thus, in the second mode, even if the upper frame 40 rises, the straw frame 50 can be held by the rear frame 37 by the lock mechanism so that the straw frame 50 does not rise.

Further, although not shown, instead of the hydraulic cylinder 41, an electric actuator (not shown) is employed as an actuator for vertically swinging the upper frame 40. An electric actuator (not shown) may be employed as the actuator for movement. The electric actuator may be either an electric motor or an electric cylinder. In this example, a control device (not shown) that controls the electric actuator is provided with a function of switching between the first mode and the second mode.

In this example, in the second mode, when the upper frame 40 and the straw frame 50 are raised to the upper limit height H2 by the operator performing the lifting operation using the lifting operation unit 112, the upper frame 40 and the straw frame 50 stops once at the ascending limit height H2. After that, when the operator again performs a lifting operation using the lifting operation section 112, only the upper frame 40 rises to the lifting limit height H1.

Further, in this example, the elevation operation unit 112 may be configured as follows. That is, in the first mode, the elevation operation unit (up switch, down switch) for raising and lowering the upper frame 40 and the straw frame 50, and in the second mode, the elevation operation unit (up switch, lowering switch), and in the second mode, an elevation operation section (upper switch, lowering switch) for raising and lowering the straw frame 50 may be provided.

[Another embodiment]
(1) In the above embodiment, the outer lock mechanism 100 is employed. Alternatively, an outer locking mechanism 200 may be employed.

As shown in FIGS. 32 and 33, the outer lock mechanism 200 includes an outer hook 201, an outer hook arm 202, an outer hook spring 203, and an outer hook pin 102. As shown in FIGS. The outer hook 201 is swingably supported by the rear surface portion of the rear stay 111 via a support shaft 204 . An outer hook spring 203 is provided across the outer hook 201 and the rear surface of the rear stay 111 to urge the outer hook 201 to swing toward the engaging side. Outer hook arm 202 is fixed to the rear end of link rod 109 . The outer hook 201 is formed with an opening 201a. The outer hook arm 202 is provided with a pin 202a projecting rearward. The pin 202a is positioned within the opening 201a. According to such a configuration, the outer hook pin 102 swings to the engagement side by engaging the outer hook arm 202 with the opening 201a via the pin 202a. At this time, the biasing force of the outer hook spring 203 allows the outer hook 201 to be quickly engaged with the outer hook pin 102 .

(2) In the above embodiment, the base end frame 66 is formed with the stepped portion 66a. However, as shown in FIG. 34, the proximal end frame 66 may not have a portion corresponding to the stepped portion 66a. In this case, since the vertical position of the inner hook 93 is higher than in the above embodiment, the vertical position of the inner hook pin 94 may be higher than in the above embodiment.

(3) In the above embodiment, if the switching plate 29a is in the open state (cutting position state), the straw extraction frame 50 rises after the switching plate 29a is switched to the closed state (non-cutting position state). You may make it Further, it is also possible not to switch to the open state (cutting position state) of the switching plate 29a while the straw discharge frame 50 is raised.

(4) In the above embodiment, the hydraulic cylinder 41 and the gas damper 71 are provided. However, instead of this, only the hydraulic cylinder 41 may be provided.

(5) In the above embodiment, the connection mechanism 87 is a bolt-type (bolt 91) connection structure. However, instead of this, the connection mechanism 87 may be a one-touch connection structure using a lever or the like.

INDUSTRIAL APPLICABILITY The present invention can be used for a combine harvester with a cabin as well as a combine harvester without a cabin.

9 feed chain 10 threshing device 11 threshing cylinder 12 straw conveying device 38 upper cover 40 upper frame 40a pressing portion 41 hydraulic cylinder (first actuator)
50 Straw frame 71 Gas damper (second actuator)
87 connection mechanism (switching mechanism, connection mechanism)
H1 Ascent limit height H2 Ascent limit height Y2 Swing axis

Claims (4)

a feed chain for pinching and conveying harvested grain culms;
a threshing device for threshing the harvested grain culms conveyed by the feed chain with a threshing cylinder;
a harvested straw conveying device that is connected to the rear side of the threshing device and that receives the discharged straw after threshing processing from the feed chain and pinches and conveys it backward,
an upper cover that covers the handling cylinder from above;
an upper frame that supports the upper cover and is capable of swinging up and down around a swing axis extending in the longitudinal direction of the machine body;
While supporting the discharged straw conveying device, the swing axis is maintained between a lowered position where the discharged straw conveying device conveys the discharged straw and an elevated position where the discharged straw conveying device does not convey the discharged straw. a straw removal frame that can swing up and down around it;
Switching between a first state in which the upper frame and the straw removal frame can rise together to the same upper limit height and a second state in which the upper frame and the straw removal frame can rise to different upper limit heights. and a switching mechanism,
In the second state, the upper limit height of the upper frame is set at a higher position than the upper limit height of the straw frame. a connection mechanism for releasably connecting the upper frame and the straw removal frame;
a first actuator for swinging the upper frame upward;
The combine according to claim 1, further comprising a second actuator for swinging the straw frame upward. 3. The combine according to claim 2, wherein in the second state, the limit height of the upper frame raised by the first actuator is set higher than the limit height of the straw frame raised by the second actuator. . The second actuator is composed of a gas damper,
The combine according to claim 3, wherein the upper frame is provided with a pressing portion for pressing the straw frame from above.

Images