JP2024087939A - combine - Google Patents

Abstract

To provide a combine in which a transmission cylinder provided above a reaping device and a pair of raising parts provided opposite to a non-raising action side are connected via a support arm, in which, when removing grain culm clogged in a convey device or the like, the pair of raising device is moved forward by rotating the support arm, in which a risk occurs where the support arm unexpectedly rotates to suddenly move the raising device forward if the frontward-moved raising device is not appropriately fixed in a harvest posture after removing the clogged grain culm, which risk is solved by the present combine in which the frontward-moved raising device is quickly returned to a storage position with a simple configuration and appropriately fixed to the harvest posture.SOLUTION: Any of a plurality of raising devices having a base part pivotally supported to a reaping frame 20 and connected to a tip part of a rotatable support arm 61 is movably provided between a harvest posture and an open posture in which the device is moved toward a front side of a vehicle body. A fixing mechanism A for fixing at a harvest posture is provided to a support arm 61.SELECTED DRAWING: Figure 41

Description

The present invention relates to a combine harvester equipped with a lifting device that lifts divided stalks.

In conventional combine harvesters, a transmission tube provided above the harvesting device and a pair of lifting devices provided with opposing non-lifting sides are connected by a support arm, and when removing stalks stuck in a conveying device provided behind the lifting devices, a technology has been known in which the first and second horizontal arms of the support arm are rotated to move the lifting devices forward (see Patent Document 1).

JP 2012-29568 A

However, if the lifting device that has moved forward is not properly fixed in the harvesting position after removing the clogged stalks, there is a risk that the first and second horizontal arms of the support arm will rotate quickly against the operator's will, causing the lifting device to suddenly move forward.

The main objective of the present invention is to provide a combine harvester that can quickly return the lifting device, which has moved forward, to the storage position with a simple configuration after removing the stalks stuck in the harvesting device, and can be fixed in an appropriate harvesting position.

The invention described in claim 1 is a combine harvester in which a harvester 3 is provided in front of a machine frame 1 on which an engine E is mounted, a thresher 4 is provided behind the harvester 3, and the harvester 3 is composed of a plurality of lifting devices 31A, 31B, 31C, 31D that lift the culms in the field, a cutting blade device 32 that cuts the base of the culms, and a transport device 33 that transports the harvested culms to the thresher 4. Any of the plurality of lifting devices 31A, 31B, 31C, 31D is connected to the tip of a rotatable support arm 61 whose base is pivotally supported by the harvester frame 20, and is provided so as to be movable between a harvesting position and an open position moved to the front of the vehicle body, and a fixing mechanism A that fixes the device in the harvesting position is provided on the support arm 61.

According to the invention described in claim 1, any one of the multiple lifting devices 31A, 31B, 31C, 31D is connected to the tip of a rotatable support arm 61 whose base is pivoted to the harvesting frame 20, and is movable between a harvesting position and an open position moved forward of the vehicle body. A fixing mechanism A for fixing the lifting device in the harvesting position is provided on the support arm 61. Therefore, when removing stalks stuck in the conveying device 33 during harvesting, any one of the multiple lifting devices 31A, 31B, 31C, 31D is moved forward to the open position to increase the working space in front of the conveying device 33, making it easy to remove the stalks stuck in the conveying device 33. The support arm 61 can be fixed to the harvesting frame 20 in the harvesting position and moved to the open position appropriately regulated with a simple configuration.

The invention described in claim 2 is the combine described in claim 1 in which the lifting devices 31B and 31C at the left and right centers of the multiple lifting devices 31A, 31B, 31C, and 31D are connected to the tip of the support arm 61 and are movable between a harvesting position and an open position moved forward of the vehicle body.

The invention described in claim 3 is the combine described in claim 1 or claim 2, in which the fixing mechanism A is configured to insert the fixing body 300 into the insertion members 71b, 73b provided at the tip of the support arm 61, and to insert and fix the fixing body 300 into the insertion hole 24a of the fixing bracket 24b provided on the harvesting frame 20.

The invention described in claim 4 is the combine described in claim 3 in which a fixing bracket 24b is provided on the transmission case 24, which is a component of the harvesting frame 20 arranged along the upper part of the multiple lifting devices 31A, 31B, 31C, and 31D.

The invention described in claim 5 is the combine described in claim 3, in which insertion members 71b, 73b are provided at the tips of the upper and lower first and second horizontal arms 71 and 73 that constitute the support arm 61 whose base is pivotally supported.

FIG. 2 is a left side view of a combine harvester according to an embodiment of the present invention. FIG. FIG. 4 is a front view of the harvesting device in the stored position. FIG. FIG. FIG. A perspective view of the reaping device. FIG. FIG. 4 is an explanatory diagram of the transmission of the lifting device of the combine harvester. FIG. FIG. FIG. FIG. 4 is an explanatory diagram of a transmission case of the lifting device. FIG. 2 is a left side view of the swinging part of the combine harvester. FIG. 2 is a front view of the lifting device with its upper portion pulled out in front of the combine harvester. FIG. 2 is a left side view of the lifting device with its upper portion pulled out in front of the combine harvester. 1A and 1B are the fixed plate of the combine harvester, (c) and (d) are the rotating plate, and (e) and (f) are a cross-sectional view and a left side view of the pin. FIG. 2 is a perspective view of a first embodiment of a connecting part for preventing rotation of the lateral arm of the combine harvester. FIG. FIG. FIG. 2 is a front view of the reaping device when it is moved forward of the combine harvester in an open position. FIG. FIG. FIG. FIG. 2 is a front view of the harvester's reaping device when it is moved to the front left side of the combine harvester in an open position. FIG. FIG. FIG. FIG. 2 is a front view of the reaping device of the combine harvester in an open position moved to the front right side. FIG. FIG. FIG. FIG. 2 is a left side view of the left stock base transport device of the combine harvester. FIG. FIG. 2 is a front view of a lifting device provided in the middle of the combine in the left-right direction. FIG. FIG. 2 is an enlarged front view of the upper portion of the lifting device. FIG. 4 is an enlarged left side view of the upper portion of the lifting device. FIG. 2 is an enlarged plan view of the upper portion of the lifting device. FIG. 2 is an enlarged perspective view of a reaping device and a support arm of the combine harvester. FIG. 2 is an enlarged rear view of the support arm portion of the combine harvester. FIG. 4 is a side view for explaining the operation of the fixing mechanism of the combine harvester. FIG. 4 is a front view of a harvesting device showing another embodiment of the combine harvester. FIG. 4 is a side view of a harvesting device showing another embodiment of the combine harvester.

The following describes a combine harvester, which is one embodiment of the present invention, with reference to the attached drawings. Note that to facilitate understanding, directions are conveniently indicated as the front side, the rear side, the right hand side, and the left hand side as seen from the operator, but the configuration is not limited to these.

As shown in Figures 1 and 2, the combine harvester is provided with a traveling device 2 consisting of a pair of left and right crawlers that travel on the soil surface on the underside of the machine frame 1, and a harvesting device 3 that harvests the stalks in the field is provided on the front side of the machine frame 1. In addition, a threshing device 4 that threshes and sorts the stalks harvested by the harvesting device 3 is provided on the rear left side of the harvesting device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the harvesting device 3.

Below the control unit 5 is an engine room 6 housing an engine E, and behind the control unit 5 is a grain tank 7 for storing grains that have been threshed and sorted by the threshing device 4. The grains stored in the grain tank 7 are discharged to the outside by a discharge auger 8 connected to the grain tank 7.

A front panel 10 is provided in front of the cockpit of the control section 5, and a side panel 15 is provided to the left of the cockpit.

A monitor 11 that displays the output rotation of the engine E and the like is provided in the center of the front panel 10, and an operating lever 12 that controls the rotation of the traveling device 2 and the raising and lowering of the harvesting device 3 is provided on the right side of the monitor 11.

A main speed change lever 16 is provided at the front of the side panel 15 to operate the continuously variable transmission that increases/decreases the output rotation of the engine E and switches the direction of rotation, and a sub-speed change lever 17 is provided behind the main speed change lever 16 to operate the transmission that increases/decreases the output rotation of the continuously variable transmission.

As shown in Figures 3 to 7, the harvesting device 3 is attached to a harvesting frame 20, which serves as the main frame. The harvesting frame 20 is formed of a transmission tube 21 extending in the front-rear direction, a transmission tube 22 extending in the left-right direction provided at the front of the transmission tube 21, a transmission tube 23 extending in the up-down direction provided at the left of the transmission tube 22, and a transmission tube 24 as a transmission case extending in the left-right direction provided at the top of the transmission tube 23. The rear of the transmission tube 21 is supported so as to be swingable by a transmission tube 25 extending in the left-right direction provided at the front of the threshing device 4 to which the output rotation of the engine E is transmitted. This allows the front part of the transmission tube 21, i.e., the harvesting device 3 to be raised and lowered in the up-down direction via the harvesting frame 20 by driving a lifting cylinder (not shown) connected to the transmission tube 21. Note that inside the transmission tubes 21 to 25, there are provided rotating shafts 21A to 25A to which the output rotation of the engine E, etc. is transmitted.

The harvesting device 3 is composed of a grass dividing body 30 that divides the culms planted in the field, a lifting device 31 that raises the divided culms, a cutting blade device 32 that cuts the raised culms, and a transport device 33 that clamps the cut culms and transports them to the threshing device 4.

The raising device 31 is provided with four raising devices 31A, 31B, 31C, and 31D, in that order from the left. This allows the raising device 31A and the raising device 31B to raise the culms planted in one row, and the raising device 31C and the raising device 31D to raise the culms planted in the one row adjacent to the right of the one row. The raising device 31B and the raising device 31C are connected via a connecting member (not shown).

The reference numeral 39 indicates an auxiliary lifting device that assists the lifting of the stalks by the lifting device 31A and the lifting device 31B, etc.

The cutting blade device 32 is made up of a left cutting blade device 32A provided on the left side of the cutting device 3 and a right cutting blade device 32B provided on the right side.

The transport device 33 is formed of a stalk base transport device 34 that clamps and transports the stalk of the harvested culm, and a tip transport device 35 that clamps and transports the tip of the harvested culm. The stalk base transport device 34 is formed of a left stalk base transport device 34A provided on the left side of the harvesting device 3 and a right stalk base transport device 34B provided on the right side, and the tip transport device 35 is formed of a left tip transport device 35A provided on the left side of the harvesting device 3 and a right tip transport device 35B provided on the right side. In this specification, the left stalk base transport device 34A and the left tip transport device 35A are collectively referred to as the left transport device 33A, and the right stalk base transport device 34B and the right tip transport device 35B are collectively referred to as the right transport device 33B.

A support arm 60 is provided on the left side of the transmission tube 24, connecting the lower part of the transmission tube 24 to the upper part of the rear surface of the lifting device 31A, a support arm 61 is provided on the middle part of the transmission tube 24, connecting the lower part of the transmission tube 24 to the upper part of the rear surface of the lifting device 31B and the lifting device 31C, and a support arm 62 is provided on the right side of the transmission tube 24, connecting the lower part of the transmission tube 24 to the upper part of the rear surface of the lifting device 31D. Inside the support arms 60 to 62, a rotating shaft (not shown) is provided to transmit the output rotation of the engine E or the like.

The support arm 60 extends downward from the lower part of the transmission tube 24, then curves forward and is connected to the rear surface of the lifting device 31A. The support arm 62 extends downward from the lower part of the transmission tube 24, then curves forward and is connected to the rear surface of the lifting device 31D.

The support arm 61 is formed of a first vertical arm 70 extending downward from the lower part of the transmission tube 24, a first horizontal arm 71 rotatably supported at the lower part of the first vertical arm 70, a second vertical arm 72 extending downward from the lower part of the tip of the first horizontal arm 71, a second horizontal arm 73 rotatably supported at the lower part of the first vertical arm 70, and a third vertical arm 74 extending downward from the lower part of the tip of the second horizontal arm 73 and then curving forward to be connected to the rear surface of the lifting device 31B and the lifting device 31C. As a result, when removing the stalks stuck in the conveying device 33, etc., the lifting device 31B and the lifting device 31C are moved forward to an open position as shown in FIG. 27, and the working space in front of the conveying device 33 is enlarged, making it easy to remove the stalks stuck in the conveying device 33.

When the support arm 61 is in the stored position (harvesting position), the longitudinal direction of the first horizontal arm 71 and the longitudinal direction of the second horizontal arm 73 extend left and right along the transmission tube 24 and are provided behind the lifting device 31B and the lifting device 31C. This makes it possible to prevent the stalks and other materials lifted by the lifting device 31A and the lifting device 31B from becoming entangled in the first horizontal arm 71 and the second horizontal arm 73.

<Transmission of engine output rotation>
As shown in FIG. 8, the output rotation of the engine E is transmitted to a rotating shaft 25A mounted inside a transmission cylinder 25 via a belt 40 or the like.

The output rotation transmitted to the rotating shaft 25A is transmitted to the right tip transport chain 35b of the right tip transport device 35B via a gear 41 etc. provided in the middle of the rotating shaft 25A. In addition, the output rotation transmitted to the rotating shaft 25A is transmitted to the rotating shaft 21A installed inside the transmission tube 21 via a gear 42 etc. provided on the right side of the rotating shaft 25A.

The output rotation transmitted to the rotating shaft 21A is transmitted to the right stock base conveying chain 34b of the right stock base conveying device 34B via a gear 43 etc. provided in the middle of the rotating shaft 21A. In addition, the output rotation transmitted to the rotating shaft 21A is transmitted to the rotating shaft 22A installed inside the transmission tube 22 via a gear 44 etc. provided in the front part of the rotating shaft 21A.

The output rotation transmitted to the rotating shaft 22A is transmitted to the left cutting blade device 32A via a swing rod 56 etc. provided on the left side of the rotating shaft 22A, and is transmitted to the right cutting blade device 32B via a swing rod 57 etc. provided on the right side of the rotating shaft 22A. In addition, the output rotation transmitted to the rotating shaft 22A is transmitted to the rotating shaft 23A installed inside the transmission tube 23 via a gear 45 etc. provided on the left side of the rotating shaft 22A.

The output rotation transmitted to the rotating shaft 23A is transmitted to the left stalk base conveying chain 34a of the left stalk base conveying device 34A and the left ear tip conveying chain 35a of the left ear tip conveying device 35A via a gear 46 etc. provided in the middle of the rotating shaft 23A. In addition, the reference numeral 37 indicates the supply chain of the supply device that transfers the stalks conveyed to the rear of the conveying device 33 to the threshing device 4, and the reference numeral 38 indicates the adjustment chain of the adjustment device that adjusts the position of the stalks conveyed by the conveying device 33.

The output rotation transmitted to the rotating shaft 23A is transmitted to the rotating shaft 24A mounted inside the transmission tube 24 via a gear 47 and a gear box 48 provided at the front of the rotating shaft 23A.

The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 81 via the gear 50 and the gear 80 provided on the left side of the rotating shaft 24A, and the output rotation transmitted to the rotating shaft 81 is transmitted to the lifting device 31A via the gear 82.

The output rotation transmitted to the rotating shaft 24A is transmitted to the first rotating shaft 75A via the gear 51 and the gear 84 provided in the middle of the rotating shaft 24A, the output rotation transmitted to the first rotating shaft 75A is transmitted to the second rotating shaft 77A via the first gear 75, the first counter gear 76, and the second gear 77U, and the output rotation transmitted to the second rotating shaft 77A is transmitted to the third rotating shaft 79A via the third gear 77D, the second counter gear 78, and the fourth gear 79. The gear 84 is provided on the upper part of the first rotating shaft 75A, and the first gear 75 is provided on the lower part of the first rotating shaft 75A. The second gear 77U is provided on the upper part of the second rotating shaft 77A, and the third gear 77D is provided on the lower part of the second rotating shaft 77A.

The output rotation transmitted to the third rotating shaft 79A is transmitted to the rotating shaft 87 via gears 85 and 86, and the output rotation transmitted to the rotating shaft 87 is transmitted to the lifting device 31B via gear 88 provided on the left side of the rotating shaft 87, and is transmitted to the lifting device 31C via gear 89 provided on the right side of the rotating shaft 87. The fourth gear 79 is provided on the top of the third rotating shaft 79A, and the gear 85 is provided on the bottom of the first rotating shaft 75A.

The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 91 via the gear 52 and the gear 90 provided on the right side of the rotating shaft 24A, and the output rotation transmitted to the rotating shaft 91 is transmitted to the lifting device 31D via the gear 92.

This allows the output rotation of engine E to be transmitted to the lifting devices 31A-31D, the cutting blade device 32, and the transport device 33.

<Support arm>
9, the first horizontal arm 71 is provided with a first gear 75, a first counter gear 76, and a second gear 77U. The first gear 75 is supported by a first rotating shaft 75A extending vertically at the right part of the first horizontal arm 71, the first counter gear 76 is supported by a first counter shaft 76A extending vertically at the middle part of the first horizontal arm 71, and the second gear 77U is supported by a second rotating shaft 77A extending vertically at the left part of the first horizontal arm 71. The second rotating shaft 77A is formed to extend from the upper side of the left part of the first horizontal arm 71 to the lower side of the left part of the second horizontal arm 73.

The first rotating shaft 75A is rotatably supported by the first horizontal arm 71, the first counter shaft 76A is rotatably supported by the first horizontal arm 71, and the upper part of the second rotating shaft 77A is rotatably supported by the first horizontal arm 71.

The second horizontal arm 73 is provided with a third gear 77D, a second counter gear 78, and a fourth gear 79. The third gear 77D is supported by a second rotating shaft 77A extending vertically on the left side of the second horizontal arm 73, the second counter gear 78 is supported by a second counter shaft 78A extending vertically on the middle side of the second horizontal arm 73, and the fourth gear 79 is supported by a third rotating shaft 79A extending vertically on the right side of the second horizontal arm 73.

The lower part of the second rotating shaft 77A is rotatably supported by the second horizontal arm 73, the second counter shaft 78A is rotatably supported by the second horizontal arm 73, and the third rotating shaft 79A is rotatably supported by the second horizontal arm 73.

The pitch circles of the first gear 75 and the second gear 77U are formed to have the same diameter. This allows the rotation angle of the first gear 75 and the rotation angle of the second gear 77U to be the same angle. In addition, one first counter gear 76, which is an odd number, is provided between the first gear 75 and the second gear 77U. This allows the rotation direction of the first gear 75 and the rotation direction of the second gear 77U to be set in the same direction. Note that two or more first counter gears 76 can be provided between the first gear 75 and the second gear 77U, and when an even number of first counter gears 76 are provided, the rotation direction of the first gear 75 and the rotation direction of the second gear 77U can be set in the opposite direction.

The pitch circles of the third gear 77D and the fourth gear 79 are formed to have the same diameter. This allows the rotation angle of the third gear 77D and the rotation angle of the fourth gear 79 to be the same angle. In addition, one odd-numbered second counter gear 78 is provided between the third gear 77D and the fourth gear 79. This allows the rotation direction of the third gear 77D and the rotation direction of the fourth gear 79 to be set in the same direction. Note that two or more second counter gears 78 can be provided between the third gear 77D and the fourth gear 79. When an even number of second counter gears 78 are provided, the rotation direction of the third gear 77D and the rotation direction of the fourth gear 79 can be set in the opposite direction.

In this embodiment, the pitch circles of the first gear 75, first counter gear 76, second gear 77U, third gear 77D, second counter gear 78, and fourth gear 79 are formed to have the same diameter. This increases the compatibility of the first gear 75, etc., and allows for commonality of the first gear 75, etc.

As shown in Figures 10 and 11, the front of the first horizontal arm 71 and the rear of the second horizontal arm 73 are rotatably connected via a resistor 65 that generates a predetermined resistance when rotating. This prevents the second horizontal arm 73 from rotating excessively relative to the first horizontal arm 71 against the operator's intention, allowing the operator to safely remove stalks stuck in the conveying device 33, etc. The resistor 65 is provided on the outer periphery of the second rotating shaft 77A.

The lower part of the first vertical arm 70 and the rear part of the first horizontal arm 71, and the front part of the first horizontal arm 71 and the upper part of the third vertical arm 74 can be connected by resistors 65 that generate a predetermined resistance when rotating. This prevents the first horizontal arm 71 from rotating excessively relative to the first vertical arm 70 and the third vertical arm 74 from rotating excessively relative to the second horizontal arm 73 against the intention of the worker, making it possible to more safely remove the straw stuck in the conveying device 33, etc. The resistors 65 provided between the lower part of the first vertical arm 70 and the rear part of the first horizontal arm 71 are provided on the outer periphery of the first rotating shaft 75A, and the resistors 65 provided between the front part of the first horizontal arm 71 and the upper part of the third vertical arm 74 are provided on the outer periphery of the third rotating shaft 79A.

As shown in FIG. 12, the resistor 65 is formed of a cylindrical receiving cylinder 66 and a pushing cylinder 67. The inner periphery of the receiving cylinder 66 is fitted onto the first rotating shaft 75A, etc., and four grooves 66A are formed at predetermined radial positions on the surface of the receiving cylinder 66 facing the pushing cylinder 67, spaced 90 degrees apart in the circumferential direction. The outer periphery of the pushing cylinder 67 is fitted onto the right part of the first horizontal arm 71, etc., and the surface of the pushing cylinder 67 facing the receiving cylinder 66 is provided with a sliding member 67A such as a steel ball at a predetermined radial position, and a biasing means 67B such as a spring that biases the sliding member 67A toward the receiving cylinder 66.

The groove 60A can be formed in a hemispherical or V-shape, and the sliding member 67A can be formed in a spherical or elliptical shape. In addition, two sets of sliding members 67A and biasing means 67B spaced 180 degrees apart at a predetermined radial position on the opposing surface of the pushing cylinder 67, or four sets of sliding members 67A and biasing means 67B spaced 90 degrees apart at a predetermined radial position, can also be provided.

When the first horizontal arm 71 etc. is rotated around the first rotation shaft 75A, the sliding member 67A of the pushing cylinder 67 moves circumferentially through a predetermined radial position on the opposing surface of the receiving cylinder 66, and then fits into the groove 66A of the receiving cylinder 66. This restricts the circumferential movement of the sliding member 67A of the pushing cylinder 67, preventing the first horizontal arm 71 etc. from rotating against the operator's will, making it safer to remove the straw stuck in the conveying device 33 etc.

It is preferable to cover the surface of the receiving cylinder 66 facing the pushing cylinder 67 with an anti-slip material 68 such as cork, rubber, sponge, or resin. This prevents the first horizontal arm 71 and the second horizontal arm 73 from rotating excessively against the operator's intention, making it even safer to remove the stalks stuck in the conveying device 33, etc.

As shown in FIG. 13, the first vertical arm 70 with the first rotating shaft 75A mounted therein is offset to the right of the center of the lifting device 31B and the lifting device 31C in the left-right direction. As a result, when removing culms stuck at the joining position where the left conveying device 33A and the right conveying device 33B approach each other, where the culms raised by the lifting device 31A and the lifting device 31B and the culms raised by the lifting device 31C and the lifting device 31D join, the lifting device 31B and the lifting device 31C can be moved forward and to the right to create a larger working space in front of the conveying device 33, etc., making it easier to remove the culms.

Openings for passing the fixing pins 95 are provided at the front of the transmission tube 24, the front of the base of the first horizontal arm 71 of the support arm 61, and the front of the tip of the second horizontal arm 73. As a result, when the support arm 61 is in the stored position (harvesting position), the first horizontal arm 71 and second horizontal arm 73 of the support arm 61 are fixed to the transmission tube 24, preventing the first horizontal arm 71 and second horizontal arm 73 from rotating and causing the support arm 61 to assume an open position.

Also, as shown in Figures 40 to 42, instead of the fixing pin 95, a fixing mechanism A may be provided that fixes the support arm 61 to the transmission tube 24 in the storage position (harvesting position) and restricts the movement of the lifting device 31B and the lifting device 31C.

That is, a first cylinder 71a and a second cylinder 73a are fixed to the tip of the first horizontal arm 71 and the second horizontal arm 73 of the support arm 61, respectively, and the lower part of the first round pipe 71b as an insertion member is fitted and fixed into the first cylinder 71a, and the upper part of the second round pipe 73b as an insertion member is fitted and fixed into the second cylinder 73a.

The fixing bracket 24b has an insertion hole 24a at a position that is coaxial with the first round pipe 71b inserted in the first cylinder 71a and the second round pipe 73b inserted in the second cylinder 73a when the support arm 61 is in the stored position, and is fixed to the underside of the transmission tube 24 that constitutes the cutting frame 20.

Then, a round bar 300 is inserted from below into the first round pipe 71b inserted into the first cylinder 71a and the second round pipe 73b inserted into the second cylinder 73a, and a first insertion hole 300a is provided at the top of the round bar 300. A first pin 301a is inserted into the first insertion hole 300a at the top of the round bar 300 that has passed through the insertion hole 24a of the fixing bracket 24b and is secured with a snap pin. A second insertion hole 300b is provided in the round bar 300 at the position where the first round pipe 71b has been inserted, and the second pin 301b is inserted and secured with a snap pin.

Therefore, when the support arm 61 is in the stored position (harvesting position), the round bar 300 is inserted from below into the first round pipe 71b inserted into the first cylinder 71a and the second round pipe 73b inserted into the second cylinder 73a provided at the tip of the first horizontal arm 71 and the second horizontal arm 73 of the support arm 61, respectively, and the upper part of the round bar 300 is inserted into the insertion hole 24a of the fixing bracket 24b provided on the transmission tube 24, which is a component of the reaping frame 20. The round bar 300 is prevented from coming out by the first pin 301a and the second pin 301b, and the support arm 61 is fixed to the transmission tube 24, which is a component of the reaping frame 20, and the movement of the lifting device 31B and the lifting device 31C can be appropriately restricted.

The round bar 300 inserted into the first round pipe 71b and the second round pipe 73b may be a solid round bar or a hollow round bar (round pipe).

Also, the first cylinder 71a and the second cylinder 73a may be the first square tube 71a and the second square tube 73a, and the members that fit into them may be the first square pipe 71b and the second square pipe 73b instead of the first round pipe 71b and the second round pipe 73b, and a round bar 300 may be inserted into the first square pipe 71b and the second square pipe 73b, or a square bar 300 may be inserted into the first square pipe 71b and the second square pipe 73b instead of the round bar 300.

In other words, each component can have any shape.

In addition, the first pin 301a and the second pin 301b are used to prevent the round bar 300 from falling out, but a snap pin may also be used to prevent the round bar 300 from falling out.

The second pin 301b may also be omitted.

<Swinging parts>
14, there is provided a front-rear frame 26 that is formed from a left-right intermediate portion toward the front side of the transmission cylinder 22. A pair of left and right substantially rectangular fixing plates 27 are provided facing upward from the front side of the front-rear frame 26.

A swinging part 28 is rotatably supported on the front of the fixed plate 27. The swinging part 28 is formed of a rectangular rotating plate 28A provided between the pair of left and right fixed plates 27, an extension part 28B extending from the top of the rotating plate 28A toward the rear and upward, and a connecting part 28C extending in the left-right direction from the rear of the extension part 28B. The left part of the connecting part 28C is connected to the lower part of the rear surface of the lifting device 31B, and the right part of the connecting part 28C is connected to the lower part of the rear surface of the lifting device 31C.

A pin 29 is inserted through the opening 27a formed in the front lower part of the fixed plate 27 and the opening 28a formed in the front lower part of the rotating plate 28A, and a fixing means such as a bolt is inserted through the threaded portion 27b formed in the rear part of the fixed plate 27 and the opening 28b formed in the rear part of the rotating plate 28A. As a result, as shown in Figures 15 and 16, when moving the upper part of the lifting device 31B and the lifting device 31C forward, the fixing means is removed and the swinging part 28 is rotated counterclockwise around the pin 29, so that the upper part of the lifting device 31B and the lifting device 31C can be pulled forward to increase the working space in front of the transport device 33.

The pin 29 can be a straight pin, a stepped pin, an L-shaped pin with a bent portion formed on one side of the straight pin, or the like. When using a straight pin, it is preferable to form through holes at both ends of the straight pin and insert a snap pin or a split pin. When using a stepped pin, it is preferable to form a countersink into which the stepped portion of the stepped pin enters on the side of the fixed plate 27, and to form a through hole on the other side where the stepped portion of the stepped pin is not formed, and to insert a snap pin or a split pin. Furthermore, when using an L-shaped pin, it is preferable to provide an engagement portion (not shown) on the side of the fixed plate 27 with which the bent portion of the L-shaped pin engages, and to form a through hole on the other side where the bent portion of the L-shaped pin is not formed, and to insert a snap pin or a split pin. This makes it possible to prevent the pin 29 from falling out of the openings of the fixed plate 27 and the rotating plate 28A.

As shown in Figs. 17(a) and (b), protrusions 29a protruding in the radial direction can be formed on both ends of the pin 29. When using this pin 29, as shown in Figs. 17(c) and (d), a groove 28c extending in the radial direction is formed in the opening 28a of the rotating plate 28A through which the protrusion 29a is inserted, and as shown in Figs. 17(e) and (f), a groove 27c extending in the radial direction is formed in the opening 27a of the fixed plate 27 through which the protrusion 29a is inserted. This makes it possible to easily fix the pin 29 by rotating it around the axis after inserting the pin 29 through the opening 27a of the fixed plate 27 and the opening 28a of the rotating plate 28A.

<First type of connecting part>
18 to 20 show a first form of connecting part 93. A first rib 71A extending from the front side of the first vertical arm 70 to the front side of the second vertical arm 72 is provided on the upper part of the first horizontal arm 71, and a second rib 73A extending from the front side of the second vertical arm 72 to the front side of the third vertical arm 74 is provided on the upper part of the second horizontal arm 73.

The connecting part 93 of the first form has a recess 93A formed in the lower part and an opening 93B formed in the upper part. The upper part of the connecting part 93 is rotatably supported via a pin 94 extending in the left-right direction in front of the first rib 71A. As a result, as shown in FIG. 27, when the lifting device 31B and the lifting device 31C are moved forward, the recess 93A of the connecting part 93 engages with the second rib 73A to restrict the second horizontal arm 73 from rotating around the second vertical arm 72, preventing contact between the worker and the second horizontal arm 73 and allowing the stalk stuck in the conveying device 33, etc. to be safely removed.

The pin 94 may be a straight pin, a stepped pin, or the like. When using a straight pin, it is preferable to form openings at both ends of the straight pin and insert a snap pin or split pin therethrough. When using a stepped pin, it is preferable to form an opening on the other side of the stepped pin where the step is not formed and insert a snap pin or split pin therethrough. This makes it possible to prevent the pin 94 from falling off the front of the first rib 71A. Also, a fastening means such as a bolt may be used instead of the pin. Also, a fastening part such as a bolt may be used instead of the pin 94.

The connecting part 93 is formed as a single unit, but it can also be formed by dividing it into a left connecting part and a right connecting part, which are then connected with a fastening part such as a bolt.

<Removing grain straw stuck in the conveyor>
When the transport device 33, etc. located behind the lifting device 31B and the lifting device 31C are clogged with stalks, after stopping the engine E, the lifting device 31B and the lifting device 31C are manually moved forward to an open position as shown in Figs. 21 to 23. This creates a large working space in front of the transport device 33, etc., making it easier to remove the stalks. It is also preferable to rotate the swinging part 28 to pull out the upper parts of the lifting device 31B and the lifting device 31C forward as shown in Fig. 16. This creates a large working space in front of the transport device 33, etc., making it easier to remove the stalks.

As shown in FIG. 24, when the lifting device 31B and the lifting device 31C are manually moved forward, the first horizontal arm 71 rotates 90 degrees clockwise around the first vertical arm 70 as viewed from the axis of the first vertical arm 70, and the second horizontal arm 73 rotates 90 degrees counterclockwise around the second vertical arm 72 as viewed from the axis of the second vertical arm 72, so that the longitudinal direction of the first horizontal arm 71 and the longitudinal direction of the second horizontal arm 73 extend along the front-rear direction. This prevents the lugs that transport the stalks of the lifting device 31B and the lifting device 31C from moving up and down, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged stalks, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them into the storage position. Also, as shown in FIG. 18, it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second horizontal arm 73. This restricts the rotation of the second horizontal arm 73 and prevents the second horizontal arm 73 from coming into contact with the worker, making it possible to more safely remove the stalks stuck in the conveying device 33, etc.

If the transport device 33, etc. located to the rear right of the lifting device 31B and the lifting device 31C, becomes clogged with stalks, after stopping the engine E, as shown in Figures 25 to 27, the lifting device 31B and the lifting device 31C are manually moved forward and leftward to an open position. This allows the lifting device 31B and the lifting device 31C to be moved forward and leftward to create a large working space in front of the transport device 33, etc., making it easy to remove the stalks.

As shown in FIG. 28, when the lifting device 31B and the lifting device 31C are manually moved forward and to the left, the first horizontal arm 71 rotates 60 degrees clockwise around the first vertical arm 70 as viewed from the axis of the first vertical arm 70, and the second horizontal arm 73 rotates 120 degrees counterclockwise around the second vertical arm 72 as viewed from the axis of the second vertical arm 72, and the longitudinal direction of the first horizontal arm 71 and the longitudinal direction of the second horizontal arm 73 extend along a virtual line L1 that intersects with the front-rear direction at an intersection angle of 30 degrees. This makes it possible to prevent the lugs that transport the stalks of the lifting device 31B and the lifting device 31C from moving in the vertical direction, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged stalks, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them in the storage position. Furthermore, as shown in FIG. 18, etc., it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second horizontal arm 73. This restricts the rotation of the second horizontal arm 73 and prevents the second horizontal arm 73 from coming into contact with the worker, making it possible to more safely remove the stalks stuck in the conveying device 33, etc.

If the transport device 33, etc. located to the rear left of the lifting device 31B and the lifting device 31C becomes clogged with stalks, after stopping the engine E, as shown in Figures 29 to 31, the lifting device 31B and the lifting device 31C are manually moved forward and to the right to open the position. This moves the lifting device 31B and the lifting device 31C forward and to the right, creating a large working space in front of the transport device 33, etc., making it easy to remove the stalks.

As shown in FIG. 32, when the lifting device 31B and the lifting device 31C are manually moved forward to the right, the first horizontal arm 71 rotates 120 degrees clockwise around the first vertical arm 70 as viewed from the axis of the first vertical arm 70, and the second horizontal arm 73 rotates 60 degrees counterclockwise around the second vertical arm 72 as viewed from the axis of the second vertical arm 72, and the longitudinal direction of the first horizontal arm 71 and the longitudinal direction of the second horizontal arm 73 extend along a virtual line L2 that intersects with the front-rear direction at an intersection angle of 30 degrees. This makes it possible to prevent the lugs that transport the stalks of the lifting device 31B and the lifting device 31C from moving in the vertical direction, and when the lifting device 31B and the lifting device 31C are moved backward to the storage position, the position of the lugs can also be moved to the position before the movement. In addition, after removing the clogged stalks, the lifting device 31B and the lifting device 31C can be quickly re-driven by putting them in the storage position. Furthermore, as shown in FIG. 18, etc., it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second horizontal arm 73. This restricts the rotation of the second horizontal arm 73 and prevents the second horizontal arm 73 from coming into contact with the worker, making it possible to more safely remove the stalks stuck in the conveying device 33, etc.

<Left stock transport device>
As shown in Figures 33 and 34, the left stock base conveying device 34A is provided with a sprocket 100 around which the left stock base conveying chain 34a is wound, a star wheel 101 that rakes in the stock base of the culm to which the output rotation of the sprocket 100 is transmitted, and a pulley 102 that winds a lugged belt. In addition, the rear part of a front frame 104 extending forward and the front part of a rear frame 105 extending backward are fixed to a cylindrical body 103 that has a rotating shaft that connects the sprocket 100 and the star wheel 101 inside. This allows the cylindrical body 103 to be firmly supported on the machine frame 1 via the front frame 104 and the rear frame 105. The front part of the front frame 104 is fixed to a frame (not shown) that is erected on the machine frame 1, and the rear part of the rear frame 105 is fixed to the left part of the transmission tube 22. In addition, a protective cover 106 is provided on the upper side of the pulley 102.

<Tension adjustment mechanism>
As shown in Figures 35 and 36, the lugged chain 110 that raises the stalks is wound around a first sprocket 111 provided on the upper part of the raising device 31B, a tension sprocket 112 provided to the right of the first sprocket 111, and a second sprocket 113 provided on the lower part of the raising device 31B.

The first sprocket 111 is supported by a rotating shaft 111A, the front part of which is rotatably supported by the front cover 116 of the lifting device 31B, and the rear part of which is rotatably supported by the rear cover 117 of the lifting device 31B via a support member 114. The output rotation of a rotating shaft 87 mounted inside the third vertical arm 74 is transmitted to the rotating shaft 111A via a gear 88, etc.

The tension sprocket 112 is supported on the front of the rotating shaft 112A, and the rear of the rotating shaft 112A is rotatably supported on the right of a tension arm 115 that is rotatably supported on a support member 114. The second sprocket 113 is supported on the rotating shaft 113A, and the front of the rotating shaft 113A is rotatably supported on the front cover 116 of the lifting device 31B, and the rear of the rotating shaft 113A is rotatably supported on the rear cover 117 of the lifting device 31B.

As a result, when viewed from the axis of the rotating shaft 111A, the chain 110 is rotated counterclockwise, the fallen culms are raised by the lifting device 31A and the lifting device 31B, and the base of the culms can be efficiently cut by the left cutting blade device 32A.

The lugged chain 210 that lifts the stalks is wound around a first sprocket 211 provided at the top of the lifting device 31C, a tension sprocket 212 provided to the left of the first sprocket 211, and a second sprocket 213 provided at the bottom of the lifting device 31B.

The first sprocket 211 is supported by a rotating shaft 211A, the front part of the rotating shaft 211A is rotatably supported by a front cover 216 of the lifting device 31C, and the rear part of the rotating shaft 211A is rotatably supported by a rear cover 217 of the lifting device 31C via a support member 214. The output rotation of a rotating shaft 87 installed inside the third vertical arm 74 is transmitted to the rotating shaft 211A via a gear 89, etc.

The tension sprocket 212 is supported on the front of the rotating shaft 212A, and the rear of the rotating shaft 212A is rotatably supported on the right of a tension arm 215 that is rotatably supported on the support member 114. The second sprocket 213 is supported on the rotating shaft 213A, and the front of the rotating shaft 213A is rotatably supported on the front cover 216 of the lifting device 31C, and the rear of the rotating shaft 213A is rotatably supported on the rear cover 217 of the lifting device 31C.

As a result, when viewed from the axis of the rotating shaft 211A, the chain 210 is rotated clockwise, the fallen culms are raised by the lifting device 31C and the lifting device 31D, and the base of the culms can be efficiently cut by the right cutting blade device 32B.

As shown in Figures 40 to 42, the lower part of a rectangular vertical member 120 extending in the vertical direction is attached to the outer periphery of the left opening of the third vertical arm 74, and the lower part of a rectangular vertical member 220 extending in the vertical direction is attached to the outer periphery of the right opening of the third vertical arm 74. In addition, the upper parts of the vertical member 120 and vertical member 220 are connected by a rectangular horizontal member 121 extending in the left-right direction.

A tension rod 122 extending in the vertical direction is provided at a portion of the cross member 121 facing the left portion of the tension arm 115, and the lower portion of the tension rod 122 and the left portion of the tension arm 115 are connected via a biasing part 123 such as a spring. The tension rod 122 is also provided with an adjustment means 124 such as a bolt that adjusts the length of the rod that extends below the cross member 121. This makes it possible to adjust the tension that biases the left portion of the tension arm 115 upward via the biasing part 123, thereby preventing the chain 110 wound around the first sprocket 111, etc. from falling off.

A tension rod 222 extending in the vertical direction is provided at a portion of the cross member 121 facing the right portion of the tension arm 215, and the lower portion of the tension rod 222 and the right portion of the tension arm 215 are connected via a biasing part 223 such as a spring. The tension rod 222 is also provided with an adjustment means 224 such as a bolt that adjusts the length of the rod that extends below the cross member 121. This makes it possible to adjust the tension that biases the right portion of the tension arm 215 upward via the biasing part 223, thereby preventing the chain 210 wound around the first sprocket 211, etc. from falling off.

In the configuration shown in Figures 37-38, the upper parts of the vertical member 120 and vertical member 220 are connected by a horizontal member 121, but it is also possible to provide a left plate extending to the right side at the upper part of the vertical member 120, a right plate extending to the left side at the upper part of the vertical member 220, a tension rod 122 at the right part of the left plate, and a tension rod 222 at the left part of the right plate.

<Other embodiments>
43 and 44 show a front view and a side view of a five-row harvesting device 3 according to another embodiment, in which the lifting device 31 is driven by an electric motor 400.

That is, the five lifting devices 31A, 31B, 31C, 31D, and 31E of the lifting device 31 are driven by electric motors 400A, 400B, 400C, 400D, and 400E provided on the upper back surface of each device.

As a result, the drive system of the lifting device 31 only requires wiring to the electric motors 400A, 400B, 400C, 400D, and 400E, making the drive system of the lifting device 31 simpler and reducing the weight and number of parts.

Electric motors 400A, 400B, 400C, 400D, and 400E are respectively positioned at the center of the inside of the winding of the lugged chain that raises the stalks at the top of the raising device 31A, raising device 31B, raising device 31C, raising device 31D, and raising device 31E.

In addition, a camera is installed on the vehicle body to photograph the unharvested culms in front of the vehicle body, and when the camera detects that the unharvested culms have fallen, the driving speed of the electric motor (400A, 400B, 400C, 400D or 400E) of the lifting device (31A, 31B, 31C, 31D or 31E) that lifts the fallen unharvested culms is increased to improve the lifting performance of the fallen culms.

As a result, the lifting device (31A, 31B, 31C, 31D or 31E) can be adjusted to a lifting speed that matches the fallen state of the harvested stalks, and the transport posture is stable, allowing for good harvesting work.

In addition, the electric motors 400A, 400B, 400D, and 400E of the lifting devices 31A and 31B, and the lifting devices 31D and 31E, which have lifting lugs facing each other to lift the culms, have a rotation speed faster than the rotation speed of the electric motor 400C of the lifting device C, which lifts the culms with a single lifting lug.

This prevents the movement of each lug from shifting, and prevents damage to the lugs.

1 Machine frame 3 Harvesting device 4 Threshing device 20 Harvesting frame 24 Transmission case (transmission tube)
24a Insertion hole 24b Fixing bracket 31A Raising device 31B Raising device 31C Raising device 31D Raising device 32 Cutting blade device 33 Transport device 61 Support arm 71 First horizontal arm 71b Insertion member (first round pipe)
73 Second horizontal arm 73b Insertion member (second round pipe)
300 Fixed body (round bar)
A Fixing mechanism E Engine

Claims (5)

A combine harvester in which a harvesting device (3) is provided in front of a machine frame (1) on which an engine (E) is mounted, a thresher (4) is provided behind the harvesting device (3), and the harvesting device (3) is composed of a plurality of lifting devices (31A, 31B, 31C, 31D) for lifting culms in the field, a cutting blade device (32) for cutting the base of the culms, and a transport device (33) for transporting the harvested culms toward the thresher (4). The combine harvester is characterized in that any of the plurality of lifting devices (31A, 31B, 31C, 31D) is connected to the tip of a rotatable support arm (61) whose base is pivotally supported on the harvesting frame (20) so that it can be freely moved between a harvesting position and an open position moved to the front of the vehicle body, and a fixing mechanism (A) for fixing it in the harvesting position is provided on the support arm (61). The combine harvester according to claim 1, characterized in that the lifting devices (31B, 31C) at the center of the left and right among the multiple lifting devices (31A, 31B, 31C, 31D) are connected to the tip of the support arm (61) and are movable between a harvesting position and an open position moved forward of the vehicle body. The combine harvester according to claim 1 or 2, characterized in that the fixing mechanism (A) is configured to insert a fixing body (300) into an insertion member (71b, 73b) provided at the tip of the support arm (61), and to insert and fix the fixing body (300) into an insertion hole (24a) of a fixing bracket (24b) provided on the harvesting frame (20). The combine harvester according to claim 3, characterized in that a fixing bracket (24b) is provided on the transmission case (24), which is a component of the harvesting frame (20) arranged along the upper part of the multiple lifting devices (31A, 31B, 31C, 31D). The combine harvester according to claim 3, characterized in that the upper and lower first horizontal arms (71) and second horizontal arms (73) constituting the support arm (61) whose base is pivotally supported are provided with insertion members (71b, 73b) at their tips.

Images