combine

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

[[Technical Field]]

[0001] The present invention relates to a combine harvester provided with a raising device that raises divided grain culms. [[Background Art]]

[0002] In a conventional combine harvester, a transmission cylinder provided above a cutting device and a pair of raising devices provided with non-raising sides facing each other are connected by a support arm, and when removing grain culms clogged in a conveying device or the like provided behind the raising devices, a technology has been known in which the first horizontal arm and the second horizontal arm of the support arm are rotated to move the raising devices forward (see Patent Document 1). [[Prior Art Literature]] [[Patent Literature]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2012-29568 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0004] However, after removing the clogged grain culms, if the raising device that has moved forward is not properly fixed in the harvesting posture, the first horizontal arm and the second horizontal arm of the support arm may rapidly rotate against the operator's intention, causing the raising device to suddenly move forward.

[0005] Therefore, a main object of the present invention is to provide a combine harvester that, after removing grain culms clogged in the cutting device, can quickly return the forward-moved raising device to the storage position with a simple configuration and properly fix it in the harvesting posture. [[Means for Solving the Problem]]

[0006] The invention described in claim 1 is a combine harvester in which a harvesting device (3) is provided on the front side of a machine frame (1) on which an engine (E) is mounted, a threshing device (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 grain stalks in the field, a cutting blade device (32) for cutting the base of the grain stalks, and a conveying device (33) for conveying the harvested grain stalks toward the threshing device (4), The lifting device is provided with a support arm (61) that movably supports a part of the lifting device with respect to the harvesting frame (20) on the harvesting device side, and the support arm (61) is formed by a first horizontal arm (71) having a first rotating shaft (75A) at its base that receives power from the harvesting frame (20) side and a second vertical rotating shaft (77A) at its tip that outputs the rotational power of the first rotating shaft (75A), and a second horizontal arm (73) at its base to which the rotational power of the second rotating shaft (77A) is input and which drives the lifting device by a third rotating shaft (79A) at its tip, and insertion members (71b, 73b) provided on each of the first horizontal arm (71) and the second horizontal arm (73), In the retracted position of the support arm (61), the device comprises a fixing body (300) that is inserted and communicates with the insertion members (71b, 73b) and the insertion hole (24a) of the fixing bracket (24b) provided on the harvesting frame (20) side, wherein in the first lateral arm (71) and the second lateral arm (73), the insertion members (71b, 73b) are respectively located at the ends in the longitudinal direction of the arm, on the side opposite to the side where the first rotation axis (75A) and the third rotation axis (79A) are located, with reference to the second rotation axis (77A). This combine harvester is characterized by the following features.

[0007] According to the invention described in claim 1, one of the multiple lifting devices 31A, 31B, 31C, and 31D is connected to the tip of a rotatable support arm 61 whose base is pivotally supported on the harvesting frame 20, and is movably positioned between a harvesting work position and an open position moved forward of the vehicle body. In addition, a fixing mechanism A for fixing in the harvesting work position is provided on the support arm 61. Therefore, when removing grain stalks that are stuck in the conveying device 33 during harvesting, one of the multiple lifting devices 31A, 31B, 31C, and 31D can be moved forward to an open position to enlarge the working space in front of the conveying device 33, making it easy to remove the grain stalks stuck in the conveying device 33. Furthermore, the support arm 61 can be fixed to the harvesting frame 20 in the harvesting work position, and its movement to the open position can be appropriately restricted with a simple configuration.

[0011] The invention described in claim 5 is a combine harvester according to claim 3, wherein insertion members 71b and 73b are provided at the tips of upper and lower first horizontal arms 71 and second horizontal arms 73 that constitute a support arm 61 whose base is pivotally supported. [Brief explanation of the drawing]

[0012] [Figure 1] This is a left side view of a combine harvester according to an embodiment of the present invention. [Figure 2] This is a plan view of the combine harvester. [Figure 3] This is a front view of the harvesting device in its stored position. [Figure 4] This is a left side view of the harvesting device. [Figure 5] This is a right side view of the harvesting device. [Figure 6]It is a plan view of said reaping device. [Figure 7] It is a perspective view of said reaping device [Figure 8] It is a transmission diagram of said reaping device. [Figure 9] It is a transmission explanatory diagram of the lifting device of said combine harvester. [Figure 10] It is a left side view of said lifting device. [Figure 11] It is an enlarged left side view of the same. [Figure 12] It is a perspective view of a resistor of said combine harvester. [Figure 13] It is an explanatory diagram of a transmission case of said lifting device. [Figure 14] It is a left side view of a swinging component of said combine harvester. [Figure 15] It is a front view of a lifting device with its upper portion pulled out forward of said combine harvester. [Figure 16] It is a left side view of a lifting device with its upper portion pulled out forward of said combine harvester. [Figure 17] (a) and (b) are a fixing plate of said combine harvester, (c) and (d) are a rotating plate, and (e) and (f) are a cross-sectional view and a left side view of a pin, respectively. [Figure 18] It is a perspective view of a first embodiment connecting component that prevents rotation of a lateral arm of said combine harvester. [Figure 19] It is a plan view of the same. [Figure 20] It is a perspective view of said connecting component. [Figure 21] It is a front view of the reaping device in an open posture moved forward of said combine harvester. [Figure 22] It is a left side view of said reaping device. [Figure 23] It is a right side view of said reaping device. [Figure 24] It is a plan view of said reaping device. [Figure 25] It is a front view of the reaping device in an open posture moved to the front left side of said combine harvester. [Figure 26] It is a left side view of said reaping device. [Figure 27] It is a right side view of said reaping device. [Figure 28] This is a plan view of the harvesting device. [Figure 29] This is a front view of the harvesting device in its open position, which has been moved to the front right side of the combine harvester. [Figure 30] This is a left side view of the harvesting device. [Figure 31] This is a right side view of the harvesting device. [Figure 32] This is a plan view of the harvesting device. [Figure 33] This is a left side view of the left-hand plant conveying device of the combine harvester. [Figure 34] This is a plan view of the plant base conveying device. [Figure 35] This is a front view of the lifting device located midway between the left and right sides of the combine harvester. [Figure 36] This is a left side view of the same ignition device. [Figure 37] This is an enlarged front view of the upper part of the lifting device. [Figure 38] This is a magnified left side view of the upper part of the lifting device. [Figure 39] This is an enlarged plan view of the upper part of the lifting device. [Figure 40] This is an enlarged perspective view of the harvesting device and support arm of the combine harvester. [Figure 41] This is a magnified rear view of the support arm section of the combine harvester. [Figure 42] This is a side view illustrating the operation of the fixing mechanism of the combine harvester. [Figure 43] This is a front view of a harvesting device showing another embodiment of the combine harvester. [Figure 44] This is a side view of a harvesting device showing another embodiment of the combine harvester. [Modes for carrying out the invention]

[0013] Hereinafter, a combine harvester, which is one embodiment of the present invention, will be described with reference to the attached drawings. For the sake of ease of understanding, directions will be conveniently indicated as front, rear, right, and left from the operator's perspective; however, the configuration is not limited by these directions.

[0014] As shown in Figures 1 and 2, the combine harvester has a running gear 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 for harvesting grain stalks in the field is provided on the front side of the machine frame 1. In addition, a threshing device 4 for threshing and sorting the grain stalks harvested by the harvesting device 3 is provided on the rear left side of the harvesting device 3, and a control unit 5 for the operator is provided on the rear right side of the harvesting device 3.

[0015] Below the control unit 5 is an engine room 6 where the engine E is mounted, and behind the control unit 5 is a grain tank 7 for storing the grain that has been threshed and sorted by the threshing device 4. The grain stored in the grain tank 7 is discharged to the outside by a discharge auger 8 connected to the grain tank 7.

[0016] A front panel 10 is provided in front of the cockpit of the control unit 5, and a side panel 15 is provided to the left of the cockpit.

[0017] A monitor 11 is provided in the center of the front panel 10 to display the output rotation of the engine E, and an operating lever 12 is provided to the right of the monitor 11 to operate the turning of the traveling device 2 and the raising and lowering of the harvesting device 3.

[0018] The front of the side panel 15 is provided with a main shift lever 16 for operating a continuously variable transmission that increases or decreases the output speed of the engine E and switches the direction of rotation. Behind the main shift lever 16 is a sub-shift lever 17 for operating the transmission that increases or decreases the output speed of the continuously variable transmission.

[0019] As shown in Figures 3-7, the harvesting device 3 is attached to the harvesting frame 20, which serves as the main frame. The harvesting frame 20 is formed from a transmission cylinder 21 extending in the front-rear direction, a transmission cylinder 22 extending in the left-right direction located at the front of the transmission cylinder 21, a transmission cylinder 23 extending in the up-down direction located to the left of the transmission cylinder 22, and a transmission cylinder 24 extending in the left-right direction as a transmission case located at the top of the transmission cylinder 23. The rear of the transmission cylinder 21 is pivotably supported by a transmission cylinder 25 extending in the left-right direction located at the front of the threshing device 4, to which the output rotation of the engine E is transmitted. This allows the front of the transmission cylinder 21, i.e., the harvesting device 3, to be raised and lowered vertically by driving a lifting cylinder (not shown) connected to the transmission cylinder 21. Rotating shafts 21A-25A, to which the output rotation of the engine E or the like is transmitted, are provided inside the transmission cylinders 21-25.

[0020] The harvesting device 3 consists of a weed divider 30 for dividing the grain stalks to be planted in the field, a lifting device 31 for lifting the separated grain stalks, a cutting blade device 32 for cutting the lifted grain stalks, and a conveying device 33 for gripping the cut grain stalks and transporting them to the threshing device 4.

[0021] The lifting device 31 is equipped with four lifting devices 31A, 31B, 31C, and 31D, in order from left to right. This allows for the planting of stalks in two rows; that is, lifting devices 31A and 31B lift the stalks planted in one row, and lifting devices 31C and 31D lift the stalks planted in the row adjacent to the right of the first row. Lifting devices 31B and 31C are connected via a connecting member (not shown).

[0022] Furthermore, reference numeral 39 indicates an auxiliary lifting device that assists in the lifting work of grain stalks by the lifting device 31A and the lifting device 31B, etc.

[0023] The cutting blade device 32 is formed from a left cutting blade device 32A located on the left side of the cutting device 3 and a right cutting blade device 32B located on the right side.

[0024] The conveying device 33 consists of a base conveying device 34 that grips and conveys the base of the harvested grain stalk and a head conveying device 35 that grips and conveys the head of the harvested grain stalk. The base conveying device 34 consists of a left base conveying device 34A located on the left side of the harvesting device 3 and a right base conveying device 34B located on the right side, and the head conveying device 35 consists of a left head conveying device 35A located on the left side of the harvesting device 3 and a right head conveying device 35B located on the right side. In this specification, the left base conveying device 34A and the left head conveying device 35A are collectively referred to as the left conveying device 33A, and the right base conveying device 34B and the right head conveying device 35B are collectively referred to as the right conveying device 33B.

[0025] A support arm 60 is provided on the left side of the transmission cylinder 24, connecting the lower part of the transmission cylinder 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 cylinder 24, connecting the lower part of the transmission cylinder 24 to the upper part of the rear surfaces of the lifting devices 31B and 31C. A support arm 62 is provided on the right side of the transmission cylinder 24, connecting the lower part of the transmission cylinder 24 to the upper part of the rear surface of the lifting device 31D. A rotating shaft (not shown) is provided inside the support arms 60 to 62, through which the output rotation of the engine E or the like is transmitted.

[0026] Support arm 60 extends downward from the lower part of the transmission cylinder 24, then curves forward and connects to the rear surface of the lifting device 31A. Support arm 62 extends downward from the lower part of the transmission cylinder 24, then curves forward and connects to the rear surface of the lifting device 31D.

[0027] The support arm 61 is formed by a first vertical arm 70 extending downward from the lower part of the transmission cylinder 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 that extends downward from the lower part of the tip of the second horizontal arm 73, then curves forward and connects to the rear surfaces of the lifting devices 31B and 31C. As a result, when removing grain stalks stuck in the conveying device 33, etc., as shown in Figure 27, the lifting devices 31B and 31C can be moved forward to an open position, increasing the working space in front of the conveying device 33 and making it easy to remove the grain stalks stuck in the conveying device 33.

[0028] When the support arm 61 is in its retracted position (in the harvesting position), the longitudinal directions of the first lateral arm 71 and the second lateral arm 73 are extended laterally along the transmission cylinder 24 and are located behind the lifting devices 31B and 31C. This prevents the stalks of grain lifted by the lifting devices 31A and 31B from becoming entangled in the first lateral arm 71 and the second lateral arm 73.

[0029] <Transmission of engine power and rotation> As shown in Figure 8, the output rotation of engine E is transmitted via a belt 40 or the like to a rotating shaft 25A housed in the transmission cylinder 25.

[0030] The output rotation transmitted to the rotating shaft 25A is transmitted to the right tip conveying chain 35b of the right tip conveying device 35B via a gear 41 or the like 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 housed in the transmission cylinder 21 via a gear 42 or the like provided on the right side of the rotating shaft 25A.

[0031] The output rotation transmitted to the rotating shaft 21A is transmitted to the right-root conveying chain 34b of the right-root conveying device 34B via a gear 43 or the like 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 housed in the transmission cylinder 22 via a gear 44 or the like provided in the front of the rotating shaft 21A.

[0032] The output rotation transmitted to the rotating shaft 22A is transmitted to the left cutting blade device 32A via an oscillating rod 56 etc. located on the left side of the rotating shaft 22A, and to the right cutting blade device 32B via an oscillating rod 57 etc. located 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 housed in the transmission cylinder 23 via a gear 45 etc. located on the left side of the rotating shaft 22A.

[0033] The output rotation, transmitted to the rotating shaft 23A, is transmitted via a gear 46 or the like, located in the middle of the rotating shaft 23A, to the left stem base conveying chain 34a of the left stem base conveying device 34A and the left ear tip conveying chain 35a of the left ear tip conveying device 35A. Reference numeral 37 indicates the supply chain of the supply device that transfers the grain stalks conveyed to the rear of the conveying device 33 to the threshing device 4, and reference numeral 38 indicates the adjustment chain of the adjustment device that adjusts the posture of the grain stalks conveyed by the conveying device 33.

[0034] The output rotation, transmitted to the rotating shaft 23A, is transmitted to the rotating shaft 24A housed in the transmission cylinder 24 via a gear 47 and gearbox 48 located at the front of the rotating shaft 23A.

[0035] The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 81 via gears 50 and 80 located 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 gear 82.

[0036] The output rotation transmitted to the rotating shaft 24A is transmitted to the first rotating shaft 75A via gears 51 and 84 located 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. 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. Gear 84 is located at the top of the first rotating shaft 75A, and the first gear 75 is located at the bottom of the first rotating shaft 75A. The second gear 77U is located at the top of the second rotating shaft 77A, and the third gear 77D is located at the bottom of the second rotating shaft 77A.

[0037] The output rotation transmitted to the third rotating shaft 79A is transmitted to the rotating shaft 87 via gears 85 and 86. The output rotation transmitted to the rotating shaft 87 is transmitted to the lifting device 31B via gear 88 located on the left side of the rotating shaft 87, and then to the lifting device 31C via gear 89 located on the right side of the rotating shaft 87. The fourth gear 79 is located on the upper part of the third rotating shaft 79A, and gear 85 is located on the lower part of the first rotating shaft 75A.

[0038] The output rotation transmitted to the rotating shaft 24A is transmitted to the rotating shaft 91 via gears 52 and 90 located on the right side of the rotating shaft 24A, and the output rotation transmitted to the rotating shaft 91 is transmitted to the hoisting device 31D via gear 92.

[0039] This allows the output rotation of engine E to be transmitted to the lifting devices 31A to 31D, the cutting blade device 32, and the conveying device 33.

[0040] <Support arm> As shown in Figure 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 that extends vertically to the right side of the first horizontal arm 71, the first counter gear 76 is supported by a first counter shaft 76A that extends vertically to the middle part of the first horizontal arm 71, and the second gear 77U is supported by a second rotating shaft 77A that extends vertically to the left side of the first horizontal arm 71. The second rotating shaft 77A extends from the upper left side of the first horizontal arm 71 to the lower left side of the second horizontal arm 73.

[0041] 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.

[0042] The second horizontal arm 73 is equipped 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 that extends vertically to the left side of the second horizontal arm 73, the second counter gear 78 is supported by a second counter shaft 78A that extends vertically to the middle part of the second horizontal arm 73, and the fourth gear 79 is supported by a third rotating shaft 79A that extends vertically to the right side of the second horizontal arm 73.

[0043] 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.

[0044] The pitch circles of the first gear 75 and the second gear 77U are formed to the same diameter. This allows the rotation angles of the first gear 75 and the second gear 77U to be the same. In addition, one first counter gear 76 is provided between the first gear 75 and the second gear 77U, which is an odd number. This allows the rotation direction of the first gear 75 and the rotation direction of the second gear 77U to be set to the same direction. Note that two or more first counter gears 76 can also be provided between the first gear 75 and the second gear 77U, and if 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 to opposite directions.

[0045] The pitch circles of the third gear 77D and the fourth gear 79 are formed to the same diameter. This allows the rotation angles of the third gear 77D and the fourth gear 79 to be the same. In addition, one second counter gear 78 is provided between the third gear 77D and the fourth gear 79, which is an odd number. This allows the rotation direction of the third gear 77D and the rotation direction of the fourth gear 79 to be set to the same direction. Note that two or more second counter gears 78 can also be provided between the third gear 77D and the fourth gear 79, and if 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 to opposite directions.

[0046] 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 the same diameter. This increases the interchangeability of the first gear 75 and other gears, and enables the standardization of the first gear 75 and other gears.

[0047] 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 during rotation. This prevents the second horizontal arm 73 from rotating excessively relative to the first horizontal arm 71 against the operator's intention, allowing for safe removal of grain stalks jammed in the conveying device 33, etc. The resistor 65 is provided on the outer circumference of the second rotating shaft 77A.

[0048] Furthermore, 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 also be connected by a resistor 65 that generates a predetermined resistance during rotation. 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, contrary to the operator's intention, thereby enabling safer removal of grain stalks stuck in the conveying device 33, etc. The resistor 65 provided between the lower part of the first vertical arm 70 and the rear part of the first horizontal arm 71 is provided on the outer circumference of the first rotating shaft 75A, and the resistor 65 provided between the front part of the first horizontal arm 71 and the upper part of the third vertical arm 74 is provided on the outer circumference of the third rotating shaft 79A.

[0049] As shown in Figure 12, the resistor 65 is formed of a cylindrical receiving cylinder 66 and a pressing cylinder 67. The inner circumference of the receiving cylinder 66 is fitted onto the first rotating shaft 75A, etc., and four grooves 66A are formed on the opposing surface of the receiving cylinder 66 that faces the pressing cylinder 67 at predetermined radial positions and spaced 90 degrees apart in the circumferential direction. The outer circumference of the pressing cylinder 67 is fitted onto the right side of the first transverse arm 71, etc., and a sliding member 67A such as a steel ball and a biasing means 67B such as a spring that biases the sliding member 67A toward the receiving cylinder 66 are provided at predetermined radial positions on the opposing surface of the pressing cylinder 67 that faces the receiving cylinder 66.

[0050] The groove 60A can be formed in a hemispherical or V-shape, and the sliding member 67A can be formed in a spherical or ellipsoidal shape. Furthermore, on the opposing surfaces of the press cylinder 67, two sets of sliding members 67A and biasing means 67B can be provided at predetermined radial positions, separated by 180 degrees, or four sets of sliding members 67A and biasing means 67B can be provided at predetermined radial positions, separated by 90 degrees.

[0051] When the first horizontal arm 71, etc., is rotated around the first rotation axis 75A, the sliding member 67A of the push cylinder 67 moves from a predetermined radial position on the opposing surface of the receiving cylinder 66 toward the circumferential direction, and then fits into the groove 66A of the receiving cylinder 66. This restricts the circumferential movement of the sliding member 67A of the push cylinder 67, preventing the first horizontal arm 71, etc., from rotating against the operator's intention, and making the removal of grain stalks stuck in the conveying device 33, etc., safer.

[0052] It is preferable to cover the opposing surface of the receiving cylinder 66 that faces the pressing cylinder 67 with an anti-slip member 68 made of cork, rubber, sponge, resin, etc. This prevents the first horizontal arm 71 and the second horizontal arm 73 from rotating excessively against the operator's intention, making the removal of grain stalks stuck in the conveying device 33, etc., even safer.

[0053] As shown in Figure 13, the first vertical arm 70, which houses the first rotating shaft 75A, is positioned to the right of the center in the left-right direction of the lifting devices 31B and 31C. This allows for easier removal of stalks stuck at the junction where the left conveying device 33A and the right conveying device 33B converge, where stalks lifted by lifting devices 31A and 31B and stalks lifted by lifting devices 31C and 31D converge. By moving lifting devices 31B and 31C to the front right, a larger working space is created in front of the conveying device 33, etc., making it easier to remove the stalks.

[0054] The front of the transmission cylinder 24, the front of the base of the first lateral arm 71 of the support arm 61, and the front of the tip of the second lateral arm 73 are provided with openings through which a fixing pin 95 can be passed. This allows the first lateral arm 71 and the second lateral arm 73 of the support arm 61 to be fixed to the transmission cylinder 24 when the support arm 61 is in the retracted position (harvesting position), preventing the first lateral arm 71 and the second lateral arm 73 from rotating and causing the support arm 61 to open.

[0055] Alternatively, as shown in Figures 40-42, instead of the fixing pin 95, a fixing mechanism A may be provided to fix the support arm 61 to the transmission cylinder 24 when in the storage position (harvesting position), thereby restricting the movement of the lifting device 31B and the lifting device 31C.

[0056] Specifically, a first cylinder 71a and a second cylinder 73a are fixed to the tips of the first horizontal arm 71 and the second horizontal arm 73 of the support arm 61, respectively. The lower part of the first round pipe 71b, which serves as an insertion member, is fitted and fixed into the first cylinder 71a, and the upper part of the second round pipe 73b, which serves as an insertion member, is fitted and fixed into the second cylinder 73a.

[0057] Furthermore, a fixing bracket 24b, which has a fitting hole 24a at a position coaxial with the first round pipe 71b fitted into the first cylinder 71a and the second round pipe 73b fitted into the second cylinder 73a when the support arm 61 is in the retracted position, is fixed to the lower surface of the transmission cylinder 24 that constitutes the harvesting frame 20.

[0058] Then, a round bar 300, which serves as a fixing body, is inserted from below into the first round pipe 71b fitted into the first cylinder 71a and the second round pipe 73b fitted into the second cylinder 73a. A first insertion hole 300a is provided in the upper part of the round bar 300, and a first pin 301a is inserted through the first insertion hole 300a in the upper part of the round bar 300 through the fitting hole 24a of the fixing bracket 24b and secured with a snap pin. A second insertion hole 300b is also provided in the round bar 300 at the position where the first round pipe 71b is inserted, and a second pin 301b is inserted and secured with a snap pin.

[0059] Therefore, when the support arm 61 is in the storage position (harvesting position), the round bar 300 is inserted from below through the first round pipe 71b fitted into the first cylinder 71a and the second round pipe 73b fitted into the second cylinder 73a, respectively, which are provided at the tips of the first lateral arm 71 and the second lateral arm 73 of the support arm 61. The upper part of the round bar 300 is then inserted through the fitting hole 24a of the fixing bracket 24b provided on the transmission cylinder 24, which is a component of the harvesting frame 20. The round bar 300 is then secured to the transmission cylinder 24, which is a component of the harvesting frame 20, by the first pin 301a and the second pin 301b, thereby fixing the support arm 61 to the transmission cylinder 24, which is a component of the harvesting frame 20, and appropriately restricting the movement of the lifting device 31B and the lifting device 31C.

[0060] The round bar 300 inserted through the first round pipe 71b and the second round pipe 73b may be a solid round bar or a hollow round bar (round pipe).

[0061] Alternatively, the first cylinder 71a and the second cylinder 73a may be replaced with a first rectangular tube 71a and a second rectangular tube 73a, and the members fitted into each may be replaced with a first rectangular pipe 71b and a second rectangular pipe 73b instead of a first round pipe 71b and a second round pipe 73b, and a round bar 300 may be inserted through the first rectangular pipe 71b and the second rectangular pipe 73b, or a rectangular bar 300 may be inserted instead of a round bar 300.

[0062] In other words, the shape of each component can be any shape.

[0063] Furthermore, while the first pin 301a and the second pin 301b were used to prevent the round bar 300 from coming loose, a snap pin could also be used to prevent the round bar 300 from coming loose.

[0064] Also, the second pin 301b may be omitted.

[0065] <Oscillating siren> As shown in Figure 14, a front and rear frame 26 is provided, which is formed from the middle of the transmission cylinder 22 in the left-right direction toward the front. A pair of roughly rectangular fixing plates 27 are erected on the front side of the front and rear frame 26, facing upwards.

[0066] A swinging component 28 is rotatably supported at the front of the fixed plate 27. The swinging component 28 is formed from a rectangular rotating plate 28A provided between a pair of left and right fixed plates 27, an extending portion 28B extending upward and rearward from the top of the rotating plate 28A, and a connecting portion 28C extending left and right from the rear of the extending portion 28B. The left part of the connecting portion 28C is connected to the lower part of the rear surface of the lifting device 31B, and the right part of the connecting portion 28C is connected to the lower part of the rear surface of the lifting device 31C.

[0067] A pin 29 is inserted through the opening 27a formed in the lower front part of the fixed plate 27 and the opening 28a formed in the lower front 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 parts of the lifting devices 31B and 31C forward, the fixing means can be removed and the swinging component 28 can be rotated counterclockwise around the pin 29 to pull the upper parts of the lifting devices 31B and 31C forward, thereby increasing the working space in front of the conveying device 33.

[0068] Pin 29 can be a straight pin, a stepped pin, or an L-shaped pin with a bent portion formed on one side of a straight pin. 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 cotter pin through them. When using a stepped pin, it is preferable to form a counterbore on the side of the fixing plate 27 into which the stepped portion of the stepped pin fits, and to form a through hole on the other side where the stepped portion of the stepped pin is not formed and insert a snap pin or cotter pin through it. Furthermore, when using an L-shaped pin, it is preferable to provide an engaging portion (not shown) on the side of the fixing plate 27 that engages with the bent portion of the L-shaped pin, and to form a through hole on the other side where the bent portion of the L-shaped pin is not formed and insert a snap pin or cotter pin through it. This prevents the pin 29 from falling out of the opening between the fixing plate 27 and the rotating plate 28A.

[0069] Furthermore, as shown in Figures 17(a) and (b), radially protruding projections 29a can be formed at both ends of the pin 29. When using this pin 29, as shown in Figures 17(c) and (d), a radially extending groove 28c is formed in the opening 28a of the rotating plate 28A through which the projection 29a is inserted, and as shown in Figures 17(e) and (f), a radially extending groove 27c is formed in the opening 27a of the fixed plate 27 through which the projection 29a is inserted. This allows the pin 29 to be easily fixed by inserting it into the openings 27a of the fixed plate 27 and the opening 28a of the rotating plate 28A, and then rotating the pin 29 around its axis.

[0070] <Connecting parts in the first form> Figures 18-20 illustrate the connecting component 93 of the first embodiment. A first rib 71A is erected on the upper part of the first horizontal arm 71, extending from the front of the first vertical arm 70 to the front of the second vertical arm 72, and a second rib 73A is erected on the upper part of the second horizontal arm 73, extending from the front of the second vertical arm 72 to the front of the third vertical arm 74.

[0071] In the first embodiment, a recess 93A is formed in the lower part of the connecting component 93, and an opening 93B is formed in the upper part. The upper part of the connecting component 93 is rotatably supported via a pin 94 that extends in the left-right direction to the front of the first rib 71A. As a result, as shown in Figure 27, when the lifting device 31B and the lifting device 31C are moved forward, the recess 93A of the connecting component 93 engages with the second rib 73A, restricting the rotation of the second horizontal arm 73 around the second vertical arm 72, thereby preventing contact between the worker and the second horizontal arm 73 and allowing for the safe removal of grain stalks stuck in the conveying device 33, etc.

[0072] Pin 94 can 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 cotter pin through them. When using a stepped pin, it is preferable to form an opening on the side of the stepped pin that does not have a stepped portion and insert a snap pin or cotter pin through it. This prevents the pin 94 from falling out of the front of the first rib 71A. Alternatively, fastening means such as a bolt can be used instead of the pin. Alternatively, fastening components such as a bolt can be used instead of the pin 94.

[0073] Furthermore, although the connecting part 93 is formed as a single unit, it can also be formed by separating the left connecting part and the right connecting part and connecting them with fastening components such as bolts.

[0074] <Removing grain stalks that have become jammed in the conveying device> If grain stalks become jammed in the conveying device 33, etc., located behind the lifting devices 31B and 31C, after stopping the engine E, manually move the lifting devices 31B and 31C forward to open them, as shown in Figures 21-23. This creates a large working space in front of the conveying device 33, etc., allowing the grain stalks to be easily removed. Alternatively, as shown in Figure 16, it is preferable to rotate the oscillating component 28 to pull the upper parts of the lifting devices 31B and 31C forward. This creates an even larger working space in front of the conveying device 33, etc., allowing the grain stalks to be removed even more easily.

[0075] As shown in Figure 24, when the lifting devices 31B and 31C are manually moved forward, the first horizontal arm 71 rotates 90 degrees clockwise around the first vertical arm 70 in the axial view of the first vertical arm 70, and the second horizontal arm 73 rotates 90 degrees counterclockwise around the second vertical arm 72 in the axial view of the second vertical arm 72, so that the longitudinal directions of the first horizontal arm 71 and the second horizontal arm 73 extend along the front-to-back direction. This prevents the lugs that transport the grain stalks of the lifting devices 31B and 31C from moving vertically, and when the lifting devices 31B and 31C are moved backward to the storage position, the position of the lugs can also be moved back to their original position. Furthermore, after removing the jammed grain stalks, the lifting devices 31B and 31C can be quickly restarted after being placed in the storage position. Furthermore, as shown in Figure 18, it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second lateral arm 73. This restricts the rotation of the second lateral arm 73, preventing it from coming into contact with the worker and allowing for safer removal of grain stalks jammed in the conveying device 33, etc.

[0076] If grain stalks become jammed in the conveying device 33, etc., located to the rear right of the lifting devices 31B and 31C, after stopping the engine E, the lifting devices 31B and 31C are manually moved to the front left to open them, as shown in Figures 25-27. This creates a large working space in front of the conveying device 33, etc., allowing the grain stalks to be easily removed.

[0077] As shown in Figure 28, when the lifting devices 31B and 31C are manually moved to the front left, the first horizontal arm 71 rotates 60 degrees clockwise around the first vertical arm 70 in an axial view of the first vertical arm 70, and the second horizontal arm 73 rotates 120 degrees counterclockwise around the second vertical arm 72 in an axial view of the second vertical arm 72, extending along a virtual line L1 where the longitudinal directions of the first horizontal arm 71 and the second horizontal arm 73 intersect the front-rear direction at an angle of 30 degrees. This prevents the lugs that transport the grain stalks of the lifting devices 31B and 31C from moving vertically, and when the lifting devices 31B and 31C are moved backward to the storage position, the position of the lugs can also be moved back to their original position. Furthermore, after removing the jammed grain stalks, the lifting devices 31B and 31C can be quickly restarted after being placed in the storage position. Furthermore, as shown in Figure 18, it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second lateral arm 73. This restricts the rotation of the second lateral arm 73, preventing it from coming into contact with the worker and allowing for safer removal of grain stalks jammed in the conveying device 33, etc.

[0078] If grain stalks become jammed in the conveying device 33, etc., located to the rear left of the lifting devices 31B and 31C, after stopping the engine E, the lifting devices 31B and 31C are manually moved to the front right to open them, as shown in Figures 29-31. This creates a large working space in front of the conveying device 33, etc., allowing the grain stalks to be easily removed.

[0079] As shown in Figure 32, when the lifting devices 31B and 31C are manually moved to the front right, the first horizontal arm 71 rotates 120 degrees clockwise around the first vertical arm 70 in an axial view of the first vertical arm 70, and the second horizontal arm 73 rotates 60 degrees counterclockwise around the second vertical arm 72 in an axial view of the second vertical arm 72, extending along a virtual line L2 where the longitudinal directions of the first horizontal arm 71 and the second horizontal arm 73 intersect the front-rear direction at an angle of 30 degrees. This prevents the lugs that transport the grain stalks of the lifting devices 31B and 31C from moving vertically, and when the lifting devices 31B and 31C are moved backward to the storage position, the position of the lugs can also be moved back to their original position. Furthermore, after removing the jammed grain stalks, the lifting devices 31B and 31C can be quickly restarted after being placed in the storage position. Furthermore, as shown in Figure 18, it is preferable to engage the recess 93A of the connecting part 93 with the second rib 73A of the second lateral arm 73. This restricts the rotation of the second lateral arm 73, preventing it from coming into contact with the worker and allowing for safer removal of grain stalks jammed in the conveying device 33, etc.

[0080] <Left-hand stock base conveying device> As shown in Figures 33 and 34, the left-root conveying device 34A includes a sprocket 100 around which the left-root conveying chain 34a is wound, a star wheel 101 that scoops up the roots of grain stalks to which the output rotation of the sprocket 100 is transmitted, and a pulley 102 around which a lugged belt is wound. Furthermore, the cylindrical body 103, which houses a rotating shaft connecting the sprocket 100 and the star wheel 101, has the rear part of the front frame 104 extending forward and the front part of the rear frame 105 extending backward fixed to it. 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) erected on the machine frame 1, and the rear part of the rear frame 105 is fixed to the left side of the transmission cylinder 22. In addition, a protective cover 106 is provided on the upper side of the pulley 102.

[0081] <Tension adjustment mechanism> As shown in Figures 35 and 36, the lugged chain 110 for lifting the grain stalks is wound around a first sprocket 111 located at the top of the lifting device 31B, a tension sprocket 112 located to the right of the first sprocket 111, and a second sprocket 113 located at the bottom of the lifting device 31B.

[0082] The first sprocket 111 is supported by the rotating shaft 111A, the front of the rotating shaft 111A is rotatably supported by the front cover 116 of the lifting device 31B, and the rear of the rotating shaft 111A is rotatably supported by the rear cover 117 of the lifting device 31B via a support member 114. The output rotation of the rotating shaft 87, which is housed in the third vertical arm 74, is transmitted to the rotating shaft 111A via gears 88 and the like.

[0083] The tension sprocket 112 is supported at the front of the rotating shaft 112A, and the rear of the rotating shaft 112A is rotatably supported on the right side of the tension arm 115, which is rotatably supported by the support member 114. The second sprocket 113 is supported on the rotating shaft 113A, the front of the rotating shaft 113A is rotatably supported by the front cover 116 of the lifting device 31B, and the rear of the rotating shaft 113A is rotatably supported by the rear cover 117 of the lifting device 31B.

[0084] This allows the chain 110 to rotate counterclockwise in the axial view of the rotating shaft 111A, thereby lifting the lodged grain stalks with the lifting devices 31A and 31B, and efficiently cutting the base of the grain stalks with the left cutting blade device 32A.

[0085] The lugged chain 210 for lifting the grain stalks is wound around a first sprocket 211 located at the top of the lifting device 31C, a tension sprocket 212 located to the left of the first sprocket 211, and a second sprocket 213 located at the bottom of the lifting device 31B.

[0086] The first sprocket 211 is supported by the rotating shaft 211A. The front part of the rotating shaft 211A is rotatably supported by the front cover 216 of the lifting device 31C, and the rear part of the rotating shaft 211A is rotatably supported by the rear cover 217 of the lifting device 31C via a support member 214. The output rotation of the rotating shaft 87, which is housed in the third vertical arm 74, is transmitted to the rotating shaft 211A via gears 89 and the like.

[0087] The tension sprocket 212 is supported at the front of the rotating shaft 212A, and the rear of the rotating shaft 212A is rotatably supported on the right side of the tension arm 215, which is rotatably supported by the support member 114. The second sprocket 213 is supported on the rotating shaft 213A, the front of the rotating shaft 213A is rotatably supported by the front cover 216 of the lifting device 31C, and the rear of the rotating shaft 213A is rotatably supported by the rear cover 217 of the lifting device 31C.

[0088] This allows the chain 210 to rotate clockwise in the axial view of the rotating shaft 211A, lifting the lodged grain stalks with the lifting device 31C and lifting device 31D, and efficiently cutting the base of the grain stalks with the right cutting blade device 32B.

[0089] As shown in Figures 40-42, 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. Furthermore, the upper parts of the vertical member 120 and the vertical member 220 are connected by a rectangular horizontal member 121 extending in the left-right direction.

[0090] A tension rod 122 extending vertically is provided on the portion of the horizontal member 121 facing the left side of the tension arm 115, and the lower part of the tension rod 122 and the left side of the tension arm 115 are connected via a biasing component 123 such as a spring. The tension rod 122 is also provided with an adjustment means 124 such as a bolt to adjust the length of the rod that extends below the horizontal member 121. This allows the tension biasing the left side of the tension arm 115 upward via the biasing component 123 to prevent the chain 110, which is wound around the first sprocket 111, from falling off.

[0091] A tension rod 222 extending vertically is provided on the portion of the horizontal member 121 facing the right side of the tension arm 215, and the lower part of the tension rod 222 and the right side of the tension arm 215 are connected via a biasing component 223 such as a spring. The tension rod 222 is also provided with an adjustment means 224 such as a bolt to adjust the length of the rod that extends below the horizontal member 121. This allows the tension biasing the right side of the tension arm 215 upward via the biasing component 223 to prevent the chain 210 wound around the first sprocket 211 from falling off.

[0092] In the configuration shown in Figures 37-38, the upper parts of the vertical members 120 and 220 are connected by a horizontal member 121. However, it is also possible to provide a left plate extending to the right on the upper part of the vertical member 120, a right plate extending to the left on the upper part of the vertical member 220, a tension rod 122 on the right side of the left plate, and a tension rod 222 on the left side of the right plate.

[0093] <Other Embodiments> Figures 43 and 44 show a front view and a side view of a five-row harvesting device 3, which is another embodiment, and illustrate an example in which the lifting device 31 is driven by an electric motor 400.

[0094] In other words, 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, which are located on the upper back surface of each device.

[0095] Therefore, the drive system of the lifting device 31 only requires wiring to electric motors 400A, 400B, 400C, 400D, and 400E, resulting in a simplified drive system for the lifting device 31, which allows for reduced weight and fewer parts.

[0096] The electric motors 400A, 400B, 400C, 400D, and 400E are positioned at the center of the inside of the winding of the lugged chain that lifts the grain stalks, respectively, at the top of the lifting devices 31A, 31B, 31C, 31D, and 31E.

[0097] Furthermore, a camera is installed on the vehicle body to photograph unharvested grain stalks in front of the vehicle. If the camera detects that the unharvested grain stalks have fallen over, the drive rotation of the electric motor (400A, 400B, 400C, 400D, or 400E) of the lifting device (31A, 31B, 31C, 31D, or 31E) that lifts the fallen grain stalks is increased to improve the lifting performance of the fallen grain stalks.

[0098] Therefore, the lifting speed of the lifting device (31A, 31B, 31C, 31D, or 31E) can be adjusted to match the lodging state of the harvested grain stalks, and a stable transport posture can be maintained, enabling efficient harvesting.

[0099] Furthermore, in the lifting devices 31A and 31B, and lifting devices 31D and 31E, where lifting lugs face each other to lift the grain stalks, the rotational speed of the electric motors 400A, 400B, 400D, and 400E is set to be faster than the rotational speed of the electric motor 400C in lifting device C, which lifts the grain stalks with a single lifting lug.

[0100] Therefore, the movement of each lifting lug can be prevented from becoming misaligned, and damage to the lifting lugs can be prevented. [Explanation of Symbols]

[0101] 1. Aircraft frame 3 Reaping device 4. Threshing machine 20 Harvesting Frames 24. Transmission case (transmission tube) 24a Insertion hole 24b Fixing bracket 31A Lifting device 31B Raising device 31C lifting device 31D lifting device 32 Cutting blade device 33 Conveying 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

[Claim 1] In a combine harvester, a harvesting device (3) is provided on the front of the machine frame (1) on which the engine (E) is mounted, and a threshing device (4) is provided behind the harvesting device (3), the harvesting device (3) is composed of a plurality of lifting devices (31A, 31B, 31C, 31D) for lifting the grain stalks in the field, a cutting blade device (32) for cutting the base of the grain stalks, and a conveying device (33) for transporting the harvested grain stalks toward the threshing device (4), A support arm (61) is provided to movably support a part of the lifting device with respect to the harvesting frame (20) on the harvesting device side. The support arm (61) A first horizontal arm (71) is provided with a first rotating shaft (75A) at its base that receives power from the harvesting frame (20), and a second rotating shaft (77A) at its tip that outputs rotational power from the first rotating shaft (75A) in the vertical direction, A second lateral arm (73) at the base receives rotational power from the second rotating shaft (77A) and drives the lifting device by the third rotating shaft (79A) at the tip, Formed by, Insertion members (71b, 73b) provided on the first horizontal arm (71) and the second horizontal arm (73), In the storage position of the support arm (61), the fixing body (300) is inserted and communicates with the insertion members (71b, 73b) and the insertion hole (24a) of the fixing bracket (24b) provided on the harvesting frame (20) side, Equipped with, In the first lateral arm (71) and the second lateral arm (73), the insertion members (71b, 73b) are respectively positioned at the ends in the longitudinal direction of the arm, on the side opposite to the side where the first rotation axis (75A) and the third rotation axis (79A) are located, with reference to the second rotation axis (77A). A combine harvester characterized by the following features.

Images