Combine harvester

Abstract

The present application provides a combine harvester capable of reliably protecting a drive shaft and less likely to cause poor delivery of crop. It is provided with a drive shaft (33) extending in the left-right direction in a state of straddling the upper portions of a plurality of standing devices (13) and supplying power to the standing devices (13); a shaft box (39) covering the drive shaft (33) from the front, the standing device (13) having a standing mechanism (24) having a ring-shaped rotating body (31) and a plurality of claw portions (32) mounted to the ring-shaped rotating body (31); a standing box (27) extending downward from the lower end of the shaft box (39) and covering the return path T2 of the standing device (13) and the standing box (27) of the ring-shaped rotating body (31) from the front in a state of exposing the delivery path T1 of the standing device (13), a recessed portion (40) recessed upward being formed at the lower end portion of the portion in the shaft box (39) corresponding to the delivery path T1, and the recessed length D1 of the recessed portion (40) being shorter than the interval between the lower end of the portion in the shaft box (39) not formed with the recessed portion (40) and the drive shaft (33) in the front view.

Description

Technical Field

[0001] The first aspect of the present invention relates to a combine harvester having multiple dividers arranged side by side in the left-right direction and forming multiple straw feeding paths.

[0002] The second and third aspects of the present invention relate to a combine harvester having a cutting section at the front of the machine body for harvesting upright rice stalks, and a plurality of rice-lifting devices arranged in a left-right direction in the cutting section. Background Technology

[0003] Regarding the first aspect of the present invention, as a combine harvester as described above, for example, there is a combine harvester described in Patent Document 1. This combine harvester includes multiple stalk-lifting devices (referred to as "stalk-lifting devices" in Patent Document 1) for lifting up planted rice stalks.

[0004] In addition, the combine harvester has a drive shaft (referred to as "crop-lifting transmission shaft" in Patent Document 1) that provides power to the crop-lifting devices. This drive shaft extends in a left-right direction, spanning the upper part of multiple crop-lifting devices. Furthermore, the drive shaft is housed in a crop-lifting transmission cylinder that extends in the left-right direction.

[0005] Regarding the second aspect of the present invention, in the aforementioned combine harvester, a lifting drive shaft is provided that extends in the left-right direction above a plurality of lifting devices and transmits power to each of the plurality of lifting devices, and the front side of the lifting drive shaft is covered by an upper cover. Moreover, conventionally, the upper cover is arranged in a state that is substantially along the front surface of the lifting device throughout its entire width in the vertical direction (for example, see Patent Document 2).

[0006] Regarding the third aspect of the present invention, in the aforementioned combine harvester, a lifting drive shaft is provided that extends in the left-right direction above a plurality of lifting devices and transmits power to each of the plurality of lifting devices, and the front side of the lifting drive shaft is covered by an upper cover. Moreover, conventionally, there is a structure in which the upper cover is supported in such a way that its posture can be changed between a closed state covering the front side of the drive shaft and an open state opening the front side of the drive shaft, and it can swing up and down about a horizontal axis, and a flexible clamping member is clamped into a mounting pin on the fixed side to maintain its position in a closed state (for example, see Patent Document 3).

[0007] Patent Document 1: Japanese Patent Application Publication No. 2010-4841

[0008] Patent Document 2: Japanese Patent Application Publication No. 2010-104258

[0009] Patent Document 3: Japanese Patent Application Publication No. 2012-29569 Summary of the Invention

[0010] Regarding the first aspect of the present invention, in the combine harvester described in Patent Document 1, it is conceivable to replace the crop-lifting transmission cylinder with an axle box that covers the drive shaft from the front. Thus, the drive shaft is protected by the axle box, and a structure is achieved where the drive shaft can be easily accessed simply by removing the axle box.

[0011] However, when the rice stalks are long-stalked varieties, consider the possibility that the upper part of the rice stalks, supported by the stalk-supporting device, might interfere with the shaft box. This would cause the upper part of the rice stalks to bend forward, potentially leading to poor stalk transport.

[0012] The first objective of this invention is to provide a combine harvester that can reliably protect the drive shaft and is less prone to poor straw conveying.

[0013] The invention is characterized by comprising: a plurality of dividers arranged side-by-side in a left-right direction, forming a plurality of straw inlet paths; a plurality of straw-lifting devices corresponding to the plurality of straw inlet paths, which lift and erect the straw; a drive shaft extending in a left-right direction across the upper part of the plurality of straw-lifting devices, and providing power to the straw-lifting devices; and an axle box covering the drive shaft from the front. The straw-lifting device has: a straw-lifting mechanism having an annular rotating body and a plurality of claws mounted on the annular rotating body; a straw-lifting box extending downward from the lower end of the axle box, and covering the return path of the straw-lifting device and the annular rotating body from the front while exposing the conveying path of the straw-lifting device. An upwardly recessed portion is formed at the lower end of the portion of the axle box corresponding to the conveying path, and in a frontal view, the recessed length is smaller than the interval between the lower end of the portion of the axle box without the recess and the drive shaft.

[0014] According to the present invention, an upwardly recessed portion is formed at the lower end of the portion of the axle box corresponding to the conveying path. This prevents the upper part of the upright rice stalks, supported by the rice-lifting device, from interfering with the axle box. Therefore, poor rice stalk conveying caused by interference between the upper part of the upright rice stalks and the axle box is easily avoided.

[0015] Furthermore, according to the present invention, in the main view, the recessed length of the recess is shorter than the distance between the lower end of the portion in the axle housing without the recess and the drive shaft. Therefore, in the main view, the lower end of the portion in the axle housing with the recess is located lower than the drive shaft. That is, in the main view, the drive shaft is in a state where its entire length spanning the left and right sides of the axle housing is hidden by the axle housing. As a result, the drive shaft is reliably protected by the axle housing.

[0016] That is, according to the present invention, a combine harvester can reliably protect the drive shaft and is less prone to poor straw conveying.

[0017] Furthermore, in this invention, it is preferred that the left and right widths of the recess are equal to the spacing between the two adjacent load-bearing boxes sandwiching the conveying path.

[0018] The smaller the width of the concave part, the easier it is to increase the strength of the axle box.

[0019] Therefore, based on the above structure, compared to the case where the left and right widths of the concave portion are larger than the interval between two adjacent load boxes separated by the conveying path, the strength of the axle box is more likely to be increased.

[0020] Furthermore, if the width of the concave section is smaller than the spacing between two adjacent grain-lifting boxes separated by the conveying path, a step can easily form between the grain-lifting boxes and the axle box. If the rice straw gets caught on this step, poor conveying of the rice straw can easily occur.

[0021] Based on the aforementioned structure, it is difficult to form steps between the rice-lifting box and the axle box. Therefore, it is easy to avoid poor rice-straw transport caused by the rice straw getting caught on the steps.

[0022] Furthermore, in this invention, it is preferred that a plurality of recesses are formed in the axle box in a state corresponding to a plurality of conveying paths, and the total left and right width of one or more of the load-bearing boxes disposed between two adjacent recesses in the left and right direction is equal to the interval between the two recesses.

[0023] In axle boxes, the greater the lateral width of the portion without recesses, the easier it is to increase the strength of the axle box.

[0024] Here, according to the structure described above, the left-right width of the portion of the axle box without recesses is equal to the total left-right width of one or more load-bearing boxes located between two adjacent recesses in the left-right direction. Therefore, compared to the case where the left-right width of the portion of the axle box without recesses is smaller than the total left-right width of one or more load-bearing boxes located between two adjacent recesses in the left-right direction, the strength of the axle box is more likely to be increased.

[0025] Furthermore, if the combined width of one or more grain-lifting boxes located between two adjacent recesses in the left-right direction is smaller than the interval between the two recesses, a step can easily form between the grain-lifting boxes and the axle box. If the grain stalks get caught on this step, poor grain stalk conveying can easily occur.

[0026] Based on the aforementioned structure, it is difficult to form steps between the rice-lifting box and the axle box. Therefore, it is easy to avoid poor rice-straw transport caused by the rice straw getting caught on the steps.

[0027] Furthermore, in this invention, it is preferable that when the claw is at its highest position within its range of motion, the claw is located near the axle box in the main view.

[0028] According to this structure, the portion of the axle box that does not have a recess extends downwards to the vicinity of the claw portion when it is in its highest position. Thus, the drive shaft is reliably protected by the axle box.

[0029] Furthermore, in this invention, it is preferred that, in the main view, the recessed length of the recess is longer than half the distance between the lower end of the portion of the axle box in which the recess is not formed and the drive shaft.

[0030] According to this structure, in the main view, the recessed length of the recess is longer than half the distance between the lower end of the portion of the axle box without a recess and the drive shaft. This makes it easier and more reliable to avoid interference between the upper part of the upright rice stalks supported by the rice-supporting device and the axle box. Consequently, it makes it easier and more reliable to avoid poor rice stalk transport caused by interference between the upper part of the upright rice stalks and the axle box.

[0031] Regarding the second aspect of the present invention, in the above-described conventional structure, there is no gap between the upper cover and the front surface of the crop-supporting device, making it less likely that the crop will be trapped between the upper cover and the front surface of the crop-supporting device. However, in the above-described conventional structure, the space between the upper cover and the crop-supporting drive shaft is narrowed, which has disadvantages such as reduced freedom of arrangement when setting components such as those supporting the upper cover.

[0032] Therefore, it is desirable to improve the flexibility of the components between the upper cover and the crop-lifting drive shaft while effectively conveying the lifted crops backward.

[0033] The combine harvester of the second aspect of the present invention is characterized in that it has a cutting section for harvesting upright rice stalks at the front of the machine body, the cutting section comprising: a plurality of stalk-lifting devices arranged in a left-right direction; a stalk-lifting drive shaft extending in a left-right direction above the plurality of stalk-lifting devices and transmitting power to the plurality of stalk-lifting devices respectively; and an upper cover covering the front side of the stalk-lifting drive shaft, the upper side portion of the upper cover being positioned forward of the front surface of the stalk-lifting devices when viewed from the side, and the lower side portion of the upper cover being lower than the stalk-lifting drive shaft having an approach portion that approaches the stalk-lifting devices.

[0034] According to the present invention, the upper side portion of the upper cover is positioned forward relative to the front surface of the crop-lifting device, and the space between the upper cover and the crop-lifting drive shaft expands in the front-rear direction. As a result, the flexibility in the placement of components between the upper cover and the crop-lifting drive shaft is increased. The lower side portion of the upper cover is positioned close to the crop-lifting device via an approach portion, thus preventing gaps from forming between the upper cover and the front surface of the crop-lifting device, and minimizing the possibility of poor crop transport.

[0035] Therefore, it can effectively transport crops and improve the freedom of setting components between the upper cover and the crop-supporting drive shaft.

[0036] In this invention, it is preferable that the upper cover, when viewed from the side, is positioned at a different height from the front surface of the rice-raising device and is located towards the front side.

[0037] According to this structure, the upper side of the upper cover is positioned closer to the front, creating a large space between the upper cover and the load-bearing drive shaft, further increasing the freedom of component placement.

[0038] In this invention, it is preferable that the approach portion has a rearward curved surface that, when viewed from the side, curves in a rearward bulging shape while approaching the rice-raising device.

[0039] According to this structure, the recessed portion of the upper cover has a rapid rearward entry and a minimal downward position change, thereby increasing the amount of entry in the front-to-back direction. Because it is recessed towards the crop-supporting device, the forward extension of the lower portion is reduced, minimizing the possibility of contact with the crop.

[0040] In this invention, it is preferable that an inclined surface is formed in the approach portion, which is inclined in a way that approaches the rice-lifting device when viewed from the side.

[0041] According to this structure, it can be addressed by a simple machining process, such as forming an inclined surface in the upper cover, thus requiring less machining time.

[0042] In this invention, it is preferred that a forward-curving surface is formed on the approach surface, which bends in a forward-bulging shape when viewed from the side and approaches the rice-raising device.

[0043] According to this structure, at the curved surface forming the upper cover, the rearward entry is rapid, while the downward position changes less, but the entry amount in the front-to-back direction can be increased. Because it is a forward-bulging shape, the space between the upper cover and the support drive shaft can also be expanded at the lower side.

[0044] In this invention, preferably, an upwardly recessed portion is formed in the lower side portion corresponding to the position above the straw-lifting path of each of the plurality of straw-lifting devices.

[0045] The aforementioned approach portion is provided in the lower side portion, corresponding to the portion above the return path of each of the aforementioned rice-lifting devices.

[0046] According to this design, because an upward-facing recess is formed above the straw-supporting path, the likelihood of damage to the ear tip from contact with the upper cover is reduced, even for tall crops. Furthermore, even if tall crops lean against the upper part of the return path, the presence of an approach section minimizes the possibility of poor crop transport.

[0047] In this invention, it is preferable that the approach portion is located above the upper end of the rice-raising device.

[0048] According to this structure, the portion of the upper cover that is lower than the approach portion is positioned close to the front surface of the crop-lifting device. As a result, the gap between the upper cover and the front surface of the crop-lifting device is reduced, allowing for smooth crop transport.

[0049] In this invention, preferably, a headlight and a headlight cover covering the headlight are provided on the lateral sides of the plurality of rice-raising devices in the left and right directions. The portion of the inner side of the headlight cover in the left and right directions adjacent to the lower side portion has a lateral retracted portion that recedes outward in the left and right directions when viewed from the main view. The outer end of the lower side portion in the left and right directions has an extended portion that extends outward in the left and right directions when viewed from the main view by entering the lateral retracted portion.

[0050] According to this structure, the space formed by the lateral retraction of the headlamp cover can be filled by the protrusion of the upper cover, which can reduce the gap between the headlamp cover and the upper cover and facilitate the smooth transport of crops.

[0051] Regarding the third aspect of the present invention, in the above-described conventional structure, the clamping retainer prevents the upper cover from accidentally opening or closing due to vibrations of the machine body or wind. However, when performing maintenance work on the lifting device or the machine body, it is necessary to switch the upper cover to the open state after swinging it upwards to release the position retention of the clamping retainer.

[0052] As a result, in addition to switching the lifting device to the open state, it is also necessary to overcome the locking force of the clamping parts to switch the upper cover to the open state, which is cumbersome.

[0053] Therefore, it is desirable to prevent the upper cover from opening and closing accidentally, and to be able to perform maintenance work without trouble.

[0054] The combine harvester of the third aspect of the present invention is characterized by having a cutting section for harvesting upright rice stalks at the front of the machine body, wherein the cutting section is provided with: a plurality of stalk-lifting devices arranged in a left-right direction; a drive shaft extending in a left-right direction above the plurality of stalk-lifting devices and transmitting power to the plurality of stalk-lifting devices respectively; and an upper cover covering the front side of the drive shaft, wherein the stalk-lifting devices are supported to be able to swing up and down about the axis of the drive shaft, and are configured to switch between a normal operating posture for lifting rice stalks and an open posture for swinging upward to open the rear side space, wherein the upper cover is supported on the stalk-lifting devices in a manner that allows it to swing up and down about the upper horizontal axis between a closed state covering the front side of the drive shaft and an open state opening the front side of the drive shaft, and has a position holding mechanism that holds the position of the upper cover in the closed state, wherein the position holding mechanism is configured such that when the stalk-lifting devices are switched from the normal operating posture to the open posture, the front surface of the stalk-lifting devices abuts against and releases the position holding.

[0055] According to the present invention, during harvesting operations, the upper cover is kept in a closed position by a position holding mechanism, thus preventing accidental opening and closing due to machine vibration, wind, or other factors. The lifting device switches to an open position by swinging up and down around the axis of the drive shaft, thereby facilitating maintenance work inside the machine. Furthermore, when the lifting device is switched from its normal operating position to the open position for maintenance work, the cover component is simultaneously switched to the open position. At this time, the front surface of the lifting device abuts against the upper cover, causing the upper cover to swing in conjunction, and the position holding mechanism releases its position holding function. As a result, the cumbersome operations of separately switching the positions of the lifting device and the upper cover are eliminated.

[0056] Therefore, it can prevent the upper cover from opening and closing accidentally, and can be maintained without much hassle.

[0057] In this invention, preferably, in the position holding mechanism, a first component disposed on the upper cover side and a second component disposed on the drive shaft side are attracted to each other by magnetic force, thereby holding the upper cover in position.

[0058] According to this structure, the first and second components are attracted to each other by magnetic force, thereby keeping the upper cover in a closed state. When the crop-lifting device is switched from its normal operating position to an open position, the first and second components separate against the magnetic force by an operating force. The magnetic force need to be only sufficient to prevent the upper cover from opening or closing accidentally during the harvesting operation, and the components can be easily separated by the operating force accompanying the change in the crop-lifting device's position.

[0059] In addition, if the structure is held in place by magnetic force, it is less prone to twisting and other issues compared to mechanical locking, and the position can be released smoothly.

[0060] In this invention, preferably, the position holding mechanism is a structure in which iron and magnets attract each other through magnetic force.

[0061] According to this structure, by setting one of the first and second components to be iron, the structure can be simplified compared to setting both to be magnets.

[0062] In this invention, it is preferred that the first component is made of iron and the second component is a magnet.

[0063] According to this structure, since the upper cover side has a first component made of iron material, even if the upper cover is made of resin material, a simple support structure can be used even without using fastening structures based on bolts or the like.

[0064] In this invention, it is preferable that the back of the upper cover has a locking portion for locking and retaining the first component.

[0065] According to this structure, since the first component is locked in place, the installation and removal of the upper cover can be easily performed.

[0066] In this invention, it is preferable that the back of the upper cover has a reinforcing rib extending in the left-right direction, and the reinforcing rib has the locking portion.

[0067] According to this structure, the upper cover can be strengthened by having reinforcing ribs. Moreover, by effectively utilizing these reinforcing ribs, the locking part can be addressed with a simple construction.

[0068] In this invention, preferably, multiple drive transmission parts that branch off from the drive axis to transmit power to multiple lifting devices are arranged at intervals in the left-right direction, and the first component is disposed at a position corresponding to the left-right middle part of the adjacent drive transmission part.

[0069] Based on this structure, considering that it has a drive transmission unit that transmits power to multiple harvesting devices at intervals on the left and right, the first component can be compactly arranged by making good use of the empty space in the middle left and right parts of the drive transmission unit.

[0070] In this invention, preferably, the first component is positioned opposite the drive shaft.

[0071] According to this structure, the upper cover is positioned opposite the drive shaft and is held in place, thus maintaining a good distance from the drive shaft. Even if it is pressed backward due to contact with an external object, it can prevent it from approaching the drive shaft.

[0072] In this invention, preferably, the second component is disposed in front of the drive shaft and covers the drive shaft.

[0073] According to this structure, the drive shaft is covered by the cover component in a manner that prevents it from winding around the crop due to rotation. Therefore, the cover component can be used effectively to mount the second component.

[0074] In this invention, preferably, multiple drive transmission parts that branch off from the drive axis to transmit power to multiple lifting devices are arranged at intervals in the left-right direction, and the second component is disposed at a position corresponding to the left-right middle part of the adjacent drive transmission part.

[0075] Based on this structure, considering that a drive transmission unit for transmitting power to multiple harvesting devices is provided on the left and right sides at intervals, the second component can be compactly arranged by making good use of the empty space in the middle left and right sides of the drive transmission unit. Attached Figure Description

[0076] First Implementation Method

[0077] Figure 1 This is a left view of a combine harvester.

[0078] Figure 2 This is a top view of a combine harvester.

[0079] Figure 3 This is a side view of the cut section.

[0080] Figure 4 This is the front view of the cut section.

[0081] Figure 5 This is the front view showing the structure of the axle box, etc.

[0082] Second Implementation Method

[0083] Figure 6 This is a side view of a combine harvester.

[0084] Figure 7 This is the front view of a combine harvester.

[0085] Figure 8 This is a side view showing the support structure of the rice-raising device.

[0086] Figure 9 This is a longitudinal sectional side view of the upper cover assembly.

[0087] Figure 10 This is a three-dimensional view showing the installation status of the second component.

[0088] Figure 11 This is a cross-sectional top view showing the installation status of the second component.

[0089] Figure 12 It is a three-dimensional view showing the installation state of the first component.

[0090] Figure 13 This is the front view of the left end of the upper cover.

[0091] Figure 14 This is a longitudinal sectional side view of the upper cover mounting section in another embodiment.

[0092] Figure 15 This is a longitudinal sectional side view of the upper cover mounting portion in another embodiment.

[0093] Third Implementation Method

[0094] Figure 16 This is a side view of a combine harvester.

[0095] Figure 17 This is the front view of a combine harvester.

[0096] Figure 18 This is a side view showing the support structure of the rice-raising device.

[0097] Figure 19 This is a longitudinal sectional side view of the upper cover assembly.

[0098] Figure 20 This is a three-dimensional view showing the installation status of the second component.

[0099] Figure 21 This is a cross-sectional top view showing the installation status of the second component.

[0100] Figure 22 It is a three-dimensional view showing the installation state of the first component.

[0101] Figure 23 This is the front view of the left end of the upper cover.

[0102] Figure 24 This is a longitudinal sectional side view of the upper cover mounting section in another embodiment.

[0103] Figure 25 This is a longitudinal sectional side view of the upper cover mounting portion in another embodiment.

[0104] Explanation of reference numerals in the attached figures

[0105] First Implementation Method

[0106] 12-point grain measure

[0107] 13. Rice-lifting device

[0108] 24. Fuhe Organization

[0109] 27. Rice-carrying box

[0110] 31. Circular rotating chain (circular rotating body)

[0111] 32 claws

[0112] 33 drive shaft

[0113] 39 Axle Box

[0114] 40 recess

[0115] D1 Indentation Length

[0116] Q1~Q7 Straw Introducing Path

[0117] T1 Conveying Path

[0118] T2 Return Path

[0119] Second Implementation Method

[0120] 2. Cutting section

[0121] 13. Rice-lifting device

[0122] 26 headlight unit

[0123] 27 Headlight Cover

[0124] 34 Fuhe drive shaft

[0125] 46. ​​Upper cover

[0126] 46A Upper side section

[0127] 46B Lower side section

[0128] 47 upward recess

[0129] 49. Rearward curved surface

[0130] 50 Lateral retraction section

[0131] 51. Protruding part

[0132] 69 Inclined surface

[0133] 70 Curved surface

[0134] Q1 Rice straw propagation path

[0135] Q2 Return Path

[0136] Third Implementation Method

[0137] 2. Cutting section

[0138] 13. Rice-lifting device

[0139] 34 drive shafts

[0140] 46. ​​Upper cover

[0141] 52 Position holding mechanism

[0142] 53 First Component

[0143] 54 Second Component

[0144] 55 Reinforcing Ribs

[0145] 56. Locking part Detailed Implementation

[0146] First Implementation Method

[0147] The embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Furthermore, in the following description, unless otherwise specified, [the following will be used as a reference to specific embodiments of the invention]. Figures 1 to 3 The direction of arrow F is set to "forward", and the direction of arrow B is set to "backward". Figure 2 , Figure 4 , Figure 5 The direction of arrow L is set to "left", and the direction of arrow R is set to "right". Additionally, [the following text is incomplete and requires further context: "to set the direction of arrow L to "left" and arrow R to "right"]. Figure 1 , Figure 3 , Figure 4 , Figure 5 The direction of arrow U is set to "up", and the direction of arrow D is set to "down".

[0148] [The overall structure of a combine harvester]

[0149] like Figure 1 , 2 As shown, the combine harvester of the present invention includes a traveling body 1 and seven harvesting sections 2 capable of harvesting upright rice stalks. An engine E is mounted on the traveling body 1.

[0150] The machine body 1 has left and right tracked running gears 4R and 4L as the running devices, and a driver's section 5 is located on the right side of the front of the machine body. A driver's seat 5a is provided in the driver's section 5. Behind the driver's section 5, in a transverse arrangement along the machine body, there is a threshing device 6 for threshing the stalks cut by the cutting section 2 and a grain bin 7 for storing the grains obtained after threshing.

[0151] The driver's section 5 is covered by the driver's cab 8. Although not shown, the threshing device 6, while using the threshing supply chain 9 to clamp and transport the stalks of harvested rice straw conveyed from the harvesting section 2, performs threshing on the tip side of the ear inside the threshing chamber, and uses a screening section located at the bottom of the threshing chamber to screen the rice into grains and dust. The rice grains are stored in the grain bin 7, and the dust is discharged outside the machine. It is equipped with a grain discharge device 10 that discharges the rice grains stored in the grain bin 7 to the outside, and a chopping device 11 that chops the threshed straw and discharges it outside the machine.

[0152] The harvesting section 2 includes: multiple (8) dividers 12 arranged side by side in the left-right direction and divided into 7 straw guide paths Q1 to Q7; 7 straw lifting devices 13 respectively provided for each of the straw guide paths Q1 to Q7 and lifting the planted straw; a pusher-type harvesting device 14 that cuts the planted straw guided into all the straw guide paths Q1 to Q7; and a conveying device 15 that causes the harvested straw to merge in the harvesting width direction and convey it backward.

[0153] Two of the eight dividers 12 located on the outermost lateral sides of the machine body separate the planted rice stalks into harvestable and non-harvestable stalks. Harvestable stalks are guided to the support path adjacent to the divider 12, while non-harvestable stalks are guided to the outer lateral side of that support path. The other dividers 12 separate the rice stalks planted in the two planting rows to their two lateral sides and guide them to the support paths on those sides. The rice stalk guide paths Q1 to Q7 have widths defined by the dividers 12 on the left and right sides and are used to guide one row of planted rice stalks.

[0154] That is, the combine harvester has multiple dividers 12, which are arranged side by side in the left-right direction and form multiple straw guide paths Q1 to Q7. In addition, the combine harvester has multiple straw lifting devices 13, which are arranged corresponding to the multiple straw guide paths Q1 to Q7 and lift the planted straw.

[0155] like Figure 1 and Figure 3 As shown, the conveying device 15 includes a packer 43A for pulling grain stalks and a raised belt 43B for pulling grain stalks. Additionally, the conveying device 15 includes stem and root conveying devices 50 and 64, and ear tip conveying devices 51 and 65. The stem and root conveying devices 50 and 64 clamp and convey the stems and roots of the harvested grain stalks. The ear tip conveying devices 51 and 65 engage and convey the ears of the harvested grain stalks. The conveying device 15 is driven by power from the engine E.

[0156] Additionally, the conveying device 15 includes a threshing depth conveying device 78 and a transfer supply device 79. The threshing depth conveying device 78 receives the cut rice stalks from the stem and root conveying devices 50 and 64 and conveys them toward the threshing conveyor chain 9. The transfer supply device 79 receives the cut rice stalks from the threshing depth conveying device 78 and transfers the cut rice stalks to the beginning end of the threshing conveyor chain 9.

[0157] [Framework structure of the cutting section]

[0158] Next, the frame structure of the cutting section 2 will be explained. For example... Figure 1 As shown, a cylindrical cutting support frame 16 with a front-to-back orientation is provided, which supports the cutting part 2 as a whole so that it can be raised and lowered relative to the traveling body 1. The cutting support frame 16 is supported by a transverse pivot support part 17 provided on the base end side of the upper rear part.

[0159] A cylindrical lower transverse frame 19 extending in the left-right direction, i.e., the harvesting width direction, is connected to the front end of the cutting support frame 16. For example... Figure 1 As shown, at both ends of the lower side transverse frame 19 in the width direction of the machine body, there are left and right front-to-back dividing frames 20 extending towards the front of the machine body. With the dividing frames 20 spanning the front and rear midpoints of these left and right end portions, a square-shaped cutter support frame 21 extending in the width direction of the machine body is connected. The harvesting device 14 is supported on the cutter support frame 21.

[0160] like Figure 2 As shown, multiple dividing frames 20 are spaced apart between the left and right end dividing frames 20. The rear ends of these middle dividing frames 20 are connected to the cutter support frame 21 and extend cantilevered towards the front of the machine body. There are a total of eight dividing frames 20, and each dividing frame 20 has a divider 12 at its front end.

[0161] like Figure 1 As shown, a cylindrical left-side up-down frame 25 is provided extending upward from the left end of the lower side transverse frame 19.

[0162] [Grass-raising device]

[0163] like Figure 1 , 3 As shown, each of the rice-lifting devices 13 is positioned in a tilted, upright posture with its lower end located at the front of the machine body and its position further back towards the upper end. It should be noted that in... Figure 3 The image shows the driver's line of sight LE from the driver's seat 5a. (See image LE.) Figure 3 As shown, the cutting section 2 is configured such that the driver can observe the front end of the divider 12 while seated in the driver's seat 5a.

[0164] The structure of each rice-raising device 13 will be described below.

[0165] like Figure 4 As shown, the rice-lifting device 13 has a rice-lifting mechanism 24 and a rice-lifting box 27. The rice-lifting mechanism 24 has an annular rotating chain 31 (equivalent to the "annular rotating body" of the present invention) that is wound across a drive sprocket 28 and a tension sprocket 29 located on the upper side and a driven sprocket 30 located on the lower side.

[0166] In addition, the lifting mechanism 24 has a plurality of claws 32. The plurality of claws 32 are mounted on the annular rotating chain 31 at predetermined intervals along the length direction of the annular rotating chain 31.

[0167] Additionally, a drive shaft 33 extends horizontally across the upper portion of each of the seven load-bearing devices 13. Power from the engine E is transmitted to the drive shaft 33. Furthermore, power from the drive shaft 33 is transmitted via a relay drive shaft 35 (see reference 1) housed within a relay transmission housing 34. Figure 3 The power is transmitted to the drive sprocket 28. Thus, the drive shaft 33 provides power to the lifting device 13. The drive shaft 33 has a hexagonal cross-sectional shape, configured to transmit power in a square-fitted state.

[0168] That is, the combine harvester has a drive shaft 33 that extends in the left-right direction across the upper part of a plurality of lifting devices 13 and provides power to the lifting devices 13.

[0169] Here, the power transmission from engine E to drive shaft 33 is described in detail. Figure 3 As shown, the combine harvester has a transverse drive shaft 111, a cutting drive shaft 112, and a transverse input shaft 113.

[0170] The transverse drive shaft 111 extends in the left-right direction and is housed inside the pivot support 17. The cut drive shaft 112 extends in the front-rear direction with a lower front and higher rear and is housed inside the cut support frame 16. The transverse input shaft 113 extends in the left-right direction and is housed inside the lower side transverse frame 19.

[0171] Power from engine E is transmitted to the transverse drive shaft 111. Additionally, power is transmitted from the transverse drive shaft 111 to the transverse input shaft 113 via the cut-off drive shaft 112. Furthermore, power is transmitted from the transverse input shaft 113 to the drive shaft 33 via a longitudinal drive shaft (not shown) housed on the left side, vertically oriented towards the frame 25.

[0172] like Figure 4As shown, the lifting device 13 sets either the left or right side of the annular rotating chain 31 as the conveying path T1, and the opposite side as the return path T2. Although not shown, in the conveying path T1, a guide plate is provided at the part through which the annular rotating chain 31 passes to guide the claw 32 to stand up.

[0173] like Figure 4 As shown, the crop-lifting devices 13, except for the fifth crop-lifting device 13 from the right, are arranged with their claws 32 facing each other, adjacent to each other on the left and right. The fifth crop-lifting device 13 from the right is arranged with its claws 32 protruding to the left and standing upright.

[0174] In the conveying path T1, the laterally protruding claws 32 of the straightening device 13 move upward while combing the rice stalks. When it reaches the end of the conveying path T1, it detaches from the rice stalks and is stored inside the straightening box 27. It then descends on the return path T2 and returns to the side of the conveying path T1. Thus, each straightening device 13 uses its upwardly moving claws 32 to straighten the planted rice stalks introduced into the straightening path.

[0175] The lifting box 27 extends in the vertical direction. In addition, the lifting box 27 is configured to cover the return path T2 and the annular rotating chain 31 of the lifting device 13 from the front while the conveying path T1 of the lifting device 13 is exposed.

[0176] 〔axle box〕

[0177] like Figure 4 and Figure 5 As shown, the combine harvester includes an axle box 39. The axle box 39 extends horizontally between each of the seven lifting devices 13 above them and covers the drive shaft 33 from the front. In addition, the lifting box 27 extends downward from the lower end of the axle box 39.

[0178] That is, the combine harvester has an axle box 39 that covers the drive shaft 33 from the front. In addition, the crop lifting device 13 has a crop lifting mechanism 24 and a crop lifting box 27. The crop lifting mechanism 24 has an annular rotating chain 31 and a plurality of claws 32 mounted on the annular rotating chain 31. The crop lifting box 27 extends downward from the lower end of the axle box 39 and covers the return path T2 of the crop lifting device 13 and the annular rotating chain 31 from the front in a state that exposes the conveying path T1 of the crop lifting device 13.

[0179] exist Figure 5 The image shows the claw 32 at its highest position P. The highest position P is the highest point within the range of motion of the claw 32. Furthermore, as shown... Figure 5 As shown, when the claw 32 is at its highest position P, in the main view, the claw 32 is located near the axle box 39.

[0180] That is, when the claw 32 is at its highest position within its range of motion, in the main view, the claw 32 is located near the axle box 39.

[0181] like Figure 4 and Figure 5 As shown in the figure, a first recess 40a, a second recess 40b, a third recess 40c, and a fourth recess 40d are formed at the lower end of the axle box 39. The first recessed portion 40a, the second recessed portion 40b, the third recessed portion 40c, and the fourth recessed portion 40d are all recessed portions 40 that are recessed upward.

[0182] The first recess 40a is formed in the axle box 39 in the portion corresponding to the first conveying path T1 and the second conveying path T1 from the right side.

[0183] The second recess 40b is formed in the axle box 39 in the portion corresponding to the third conveying path T1 and the fourth conveying path T1 from the right.

[0184] The third recess 40c is formed in the axle box 39, corresponding to the fifth transport path T1 from the right.

[0185] The fourth recess 40d is formed in the axle box 39, corresponding to the sixth and seventh transport paths T1 from the right.

[0186] That is, an upwardly recessed portion 40 is formed at the lower end of the portion of the axle box 39 corresponding to the conveying path T1. In addition, multiple recesses 40 are formed in the axle box 39 in a manner corresponding to multiple conveying paths T1.

[0187] Here, in Figure 5 The diagram shows a first position H1 and a second position H2. The first position H1 is the vertical position of the lower end of the portion of the axle housing 39 where the recess 40 is formed. The second position H2 is the vertical position of the lower end of the portion of the axle housing 39 where the recess 40 is not formed.

[0188] The interval between the first position H1 and the second position H2 in the vertical direction is equal to the recess length D1 of the recess 40 in the main view.

[0189] In addition, Figure 5 The diagram shows the third position H3. The third position H3 is the position of the lower end of the drive shaft 33 in the vertical direction. The third position H3 is higher than the first position H1.

[0190] Furthermore, the interval between the second position H2 and the third position H3 in the vertical direction is a predetermined interval D2. The predetermined interval D2 is equal to the frontal view interval between the lower end of the portion of the axle housing 39 where the recess 40 is not formed and the drive shaft 33. For example... Figure 5As shown, the recessed length D1 is shorter than the specified interval D2.

[0191] That is, in the main view, the recess length D1 of the recess 40 is shorter than the distance between the lower end of the portion of the axle box 39 in which the recess 40 is not formed and the drive shaft 33.

[0192] In addition, Figure 5 The length D3 is shown in the figure. Length D3 is half the distance between the lower end of the portion of the axle housing 39 where the recess 40 is not formed and the drive shaft 33 in the front view. Furthermore, the recess length D1 is longer than the length D3.

[0193] That is, in the main view, the recessed length D1 of the recess 40 is longer than half the distance between the lower end of the portion of the axle box 39 in which the recess 40 is not formed and the drive shaft 33.

[0194] In addition, Figure 5 The diagram shows a first width W1 and a second width W2. The first width W1 is the left and right width of the third recess 40c. The second width W2 is the interval between two adjacent load boxes 27 separated by the conveying path T1 corresponding to the third recess 40c.

[0195] The first width W1 is equal to the second width W2. That is, the left and right widths of the recess 40 are equal to the interval between two adjacent load boxes 27 separated by the conveying path T1.

[0196] It should be noted that the term "identical" in this invention includes not only strictly identical states, but also substantially identical states.

[0197] In addition, such as Figure 5 As shown, the recess 40 in this embodiment has a shape that expands downwards. Furthermore, the first width W1 is the left-right width of the central portion in the vertical direction of the third recess 40c. That is, the left-right width of the central portion in the vertical direction of the third recess 40c is approximately the same as the second width W2. Additionally, the left-right width of the upper end of the third recess 40c is slightly narrower than the second width W2. Furthermore, the left-right width of the lower end of the third recess 40c is slightly wider than the second width W2.

[0198] Thus, in this embodiment, the left-right width of the central portion in the vertical direction of each recess 40 is approximately the same as the interval between two adjacent load-bearing boxes 27 separated by the conveying path T1. Furthermore, the left-right width of the upper end of each recess 40 is slightly narrower than the interval between two adjacent load-bearing boxes 27 separated by the conveying path T1. Additionally, the left-right width of the lower end of each recess 40 is slightly wider than the interval between two adjacent load-bearing boxes 27 separated by the conveying path T1.

[0199] In addition, Figure 5The diagram shows the third width W3, the fourth width W4, and the fifth width W5. The third width W3 is the interval between the second recess 40b and the third recess 40c. The second recess 40b and the third recess 40c are two recesses 40 that are adjacent to each other in the left-right direction.

[0200] The fourth width, W4, is Figure 4 The width of the grain-lifting box 27 in the fourth grain-lifting device 13 from the right, out of the seven grain-lifting devices 13 shown. Additionally, the fifth width W5 is... Figure 4 The left and right width of the grain-lifting box 27 in the fifth grain-lifting device 13 from the right in the seven grain-lifting devices 13 shown. These two grain-lifting boxes 27 are arranged in the left and right direction between the second recess 40b and the third recess 40c.

[0201] And, as Figure 5 As shown, the sum of the fourth width W4 and the fifth width W5 is equal to the third width W3.

[0202] In addition, Figure 5 The diagram shows the sixth width W6 and the seventh width W7. The sixth width W6 is the interval between the third recess 40c and the fourth recess 40d. The third recess 40c and the fourth recess 40d are two recesses 40 that are adjacent to each other in the left-right direction.

[0203] The seventh width, W7, is Figure 4 The width of the threshing box 27 in the sixth threshing device 13 from the right among the seven threshing devices 13 shown. The threshing box 27 is positioned in the left-right direction between the third recess 40c and the fourth recess 40d.

[0204] And, as Figure 5 As shown, the seventh width W7 is equal to the sixth width W6.

[0205] That is, the total width of one or more grain-collecting boxes 27 located between two adjacent recesses 40 in the left-right direction is equal to the interval between the two recesses 40.

[0206] Based on the structure described above, an upwardly recessed portion 40 is formed at the lower end of the portion of the axle box 39 corresponding to the conveying path T1. This prevents the upper part of the planted rice stalks, supported by the rice-supporting device 13, from interfering with the axle box 39. Therefore, poor rice stalk conveying caused by interference between the upper part of the planted rice stalks and the axle box 39 is easily avoided.

[0207] Furthermore, with the structure described above, in the main view, the recessed length D1 of the recess 40 is shorter than the distance between the lower end of the portion of the axle housing 39 where the recess 40 is not formed and the drive shaft 33. Therefore, in the main view, the lower end of the portion of the axle housing 39 where the recess 40 is formed is located lower than the drive shaft 33. That is, in the main view, the drive shaft 33 appears to be hidden by the axle housing 39, spanning its entire length from left to right. As a result, the drive shaft 33 is reliably protected by the axle housing 39.

[0208] That is, based on the structure described above, a combine harvester can reliably protect the drive shaft 33 and is less prone to poor straw conveying.

[0209] [Other Implementation Methods]

[0210] (1) It can also replace the tracked driving devices 4R and 4L with wheeled driving devices, and can also be a half-tracked driving device.

[0211] (2) The width of the recess 40 can be larger or smaller than the interval between two adjacent load boxes 27 separated by the conveying path T1.

[0212] (3) The number of recesses 40 formed in the axle box 39 can be any number other than four. For example, the number of recesses 40 can also be one.

[0213] (4) The total width of one or more grain-collecting boxes 27 located between two adjacent recesses 40 in the left and right directions may be greater than or smaller than the interval between the two recesses 40.

[0214] It should be noted that the structures disclosed in the above embodiments (including other embodiments, the same below) can be combined and applied with the structures disclosed in other embodiments as long as they do not contradict each other. Furthermore, the embodiments disclosed in this specification are merely illustrative, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within the scope of the purpose of the present invention.

[0215] Industrial applications

[0216] This invention can be used in combine harvesters equipped with multiple lifting devices for supporting planted rice stalks.

[0217] Second Implementation Method

[0218] Embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that in the following description, the direction of arrow "F" is designated as "front of the fuselage," and the direction of arrow "B" is designated as "rear of the fuselage" (see reference). Figure 6Set the direction of arrow "L" to "left side of the aircraft" and the direction of arrow "R" to "right side of the aircraft" (see reference). Figure 7 ).

[0219] [Overall Structure]

[0220] like Figure 6 As shown, the combine harvester of the present invention includes a traveling body 1 and a cutting section 2 capable of harvesting seven upright rice stalks. The cutting section 2 is connected to the traveling body 1 in a manner that allows it to swing and rise around a horizontal axis P1, and is configured to be driven to rise and fall by a lifting hydraulic cylinder 3.

[0221] The machine body 1 has left and right tracked traveling devices 4, and a driver's section 5 is located on the right side (left-right side) at the front of the machine body. Behind the driver's section 5, arranged laterally along the machine body, are a threshing device 6 for threshing the stalks cut by the cutting section 2 and a grain bin 7 for storing the threshed grains. The driver's section 5 is covered by a driver's cab 8. Although not shown, the threshing device 6 threshes the stalks from the cutting section 2 by clamping and conveying them using a threshing supply chain 9, while threshing the ear tips inside the threshing chamber, and then filters the grains and dust using a screening section located at the bottom of the threshing chamber. The grains are stored in the grain bin 7, and the dust is discharged outside the machine. A grain discharge device 10 is provided to discharge the grains stored in the grain bin 7 to the outside, and a chopping device 11 is provided to chop the threshed straw and discharge it outside the machine.

[0222] like Figure 6 , 7 As shown, the harvesting section 2 includes multiple (8) dividers 12, multiple (7) stalk lifting devices 13, a pusher-type cutter 14, and a conveying device 1. The multiple (8) dividers 12 are spaced apart in the left-right direction and are used to guide each row of planted rice stalks into 7 rice stalk guiding paths. The multiple (7) stalk lifting devices 13 are arranged in the left-right direction in a manner corresponding to each of the rice stalk guiding paths and lift the planted rice stalks. The cutter 14 cuts the stems and roots of the lifted planted rice stalks. The conveying device 15 causes the harvested rice stalks to merge in the harvesting width direction and be conveyed backward.

[0223] The cutting section 2 has a cutting frame 20 that supports the entire cutting section 2. The cutting frame 20 includes: a main frame 22 that extends from the body frame 21 toward the front of the body and is supported at the rear end so that it can swing up and down; a transverse frame 23 that extends in the left and right direction at the front end of the main frame 22; and a lifting transmission box 24 that extends from one end of the transverse frame 23 toward the top of the traveling body.

[0224] The hydraulic cylinder 3 is connected to the main frame 22 and the machine frame 21. The cutting part 2 is configured to be operated by swinging up and down by the hydraulic cylinder 3, thereby enabling it to reach all working positions for harvesting. Figure 6 The state shown by the solid line) and the retreat position as the maximum upward position above ( Figure 6 and Figure 7 The state shown by the imaginary line in the middle rises and falls.

[0225] The harvesting section 2 has left and right side covers 25 that cover the left and right sides of the multiple harvesting devices 13. Above the left and right side covers 25 are left and right headlight devices 26 and left and right headlight covers 27 that cover the headlight devices 26.

[0226] The headlight cover 27 is configured to cover the upper part of the headlight device 26 on the upper part of the left and right sides of the cutting section 2, as well as the upper part of the horizontal sides of the multiple crop-lifting devices 13 in the left and right directions. The left and right side covers 25 are configured to cover the lower part of the horizontal sides of the multiple crop-lifting devices 13 in the left and right directions.

[0227] [Grass-raising device]

[0228] The supporting device 13 is positioned in a tilted, upright posture, with the lower end located at the front of the machine body and the upper end further back. For example... Figure 7 As shown, the lifting device 13 has an annular rotating chain 32 wound and tensioned around the drive wheel 29 and tension wheel 30 mounted on the upper part of the lifting box 28, and the guide wheel 31 mounted on the lower part of the housing. Multiple lifting claws 33 are supported freely on the annular rotating chain 32 at a predetermined interval.

[0229] In the rice-lifting device 13, the upward movement path on the left and right sides of the annular rotating chain 32 is the rice-lifting path Q1, and the opposite side is the return path Q2. In the rice-lifting path Q1, a guide plate is provided at the point where the annular rotating chain 32 passes, guiding the lifting claw 33 to stand upright. In the rice-lifting path Q1, if the laterally protruding lifting claw 33 moves upward while combing the rice stalks, and reaches the end of the rice-lifting path Q1, it detaches from the rice stalks and is stored inside the rice-lifting box 28, then descends in the return path back to the rice-lifting action path side.

[0230] The machine includes a lifting drive shaft 34 that extends in a left-right direction above a plurality of lifting devices 13 and transmits power to each of the lifting devices 13. Regarding the transmission structure, although not shown, power from the machine body is transmitted to the lifting drive shaft 34 via a front-rear drive shaft located inside the main frame 22, a transverse drive shaft located inside the transverse frame 23, and a longitudinal drive shaft located inside the lifting transmission box 24.

[0231] Multiple drive transmission units 35 are provided at intervals in the left-right direction, and these multiple drive transmission units 35 branch off from the lifting drive shaft 34 to multiple lifting devices 13 to transmit power respectively. For example Figure 9 As shown, the drive transmission unit 35 is configured such that an upper bevel gear mechanism 37, a longitudinal transmission shaft 38 extending along the length of the box, a lower bevel gear mechanism 39, and a front-to-back transmission shaft 40 are built inside the longitudinally elongated drive box 36, transmitting power from the lifting drive shaft 34 to the drive wheel body 29 of the lifting device 13.

[0232] like Figure 8 As shown, a control support arm 41, which is bent into a mountain shape from the base boss of the cutting frame 20, extends forward to the upper part of the lifting device 13. A support frame 42, which extends in a left-right direction above the multiple lifting devices 13, is connected to the front end of the support arm 41. The support frame 42 is formed by bending a sheet metal and is connected to the front end of the support arm 41.

[0233] Multiple support brackets 43 are bolted to the support frame 42 at intervals along the left and right direction. The drive box 36 is fitted and supported on each support bracket 43 in a manner that allows it to swing up and down around the horizontal axis X1. A load-bearing drive shaft 34 is supported through the upper part of the drive box 36. The drive box 36 is supported so that it can swing up and down around the axis X1 of the load-bearing drive shaft 34.

[0234] The crop-lifting device 13 is connected to the drive housing 36 in a state where it can swing as a whole. The crop-lifting device 13 is configured to swing up and down about the axis X of the crop-lifting drive shaft 34, such as... Figure 8 , 9 As shown, it is able to perform the normal action posture of lifting rice stalks ( Figure 9 (represented by solid lines in the middle) and an open posture that swings upwards to open up the rear side space ( Figure 9 Switching between attitudes (represented by imaginary lines). Equipped with an air damper 44 for maintaining position in the open attitude.

[0235] like Figure 9 , 10 As shown, an anti-winding cover 45 is provided in the area sandwiched by the drive transmission section 35 separated in the left and right directions, at a position corresponding to the top of the lifting path Q1, so as to cover the front side and the lower side of the lifting drive shaft 34. The left and right sides of the anti-winding cover 45 are bolted to the support bracket 43.

[0236] [Upper Cover]

[0237] like Figure 7 , 8As shown in Figure 9, an upper cover 46 covers the front side of the crop-lifting drive shaft 34. The upper cover 46 is provided to extend horizontally from the left end of the crop-lifting device 13 to the right end of the crop-lifting device 13. The upper cover 46 is made of resin material and is supported on the crop-lifting device 13 in a manner that allows it to swing up and down around the upper horizontal axis X2 in both the closed state (covering the front side of the crop-lifting drive shaft 34) and the open state (opening the front side of the crop-lifting drive shaft 34).

[0238] In the upper cover 46, an upwardly recessed portion 47 is formed at a position corresponding to the upper part of the lifting path Q1 of each of the plurality of lifting devices 13. Therefore, it is easy to avoid the upper part of the planted rice stalks lifted by the lifting device 13 interfering with the upper cover 46, which would result in poor rice stalk transport.

[0239] The upper side portion 46A of the upper cover 46 is positioned closer to the front side at a different height than the front surface 13a of the rice-lifting device 13, and the lower side portion 46B of the upper cover 46, which is lower than the rice-lifting drive shaft 34, has an approach portion 48 that approaches the rice-lifting device 13. Figure 9 , 12 As shown, the approach portion 48 is composed of a rearward curved surface 49, which curves backward and retracts to the lower side portion 46B of the upper cover 46 in a manner that approaches the supporting device 13.

[0240] An approach portion 48 is provided in the lower side portion 46B of the upper cover 46, corresponding to the upper part of the return path Q2 of each of the plurality of crop-lifting devices 13. The portion of the upper cover 46 corresponding to the upper part of the return path Q2 is wider in the vertical direction and extends to a position lower than the upper end of the crop-lifting device 13. The approach portion 48 is provided midway in the vertical direction of this wide extension portion.

[0241] The approach part 48 is located at the upper part of the upper end of the rice stalk lifting device 13. That is, a rearwardly curved surface 49 is formed at the upper part of the upper end of the rice stalk lifting device 13, which is recessed towards the rice stalk lifting device 13. As a result, even if the tip of the rice stalk lifted by the rice stalk lifting device 13 rests against the part corresponding to the upper part of the return path Q2, it is easy to avoid interference with the upper cover 46 and poor rice stalk conveying.

[0242] like Figure 13As shown, the portion of the headlight cover 27 located on the inner left-right side, adjacent to the lower side portion 46B of the upper cover 46, has a lateral retractable portion 50 that retracts outward in the left-right direction when viewed from the front. Furthermore, the outer left-right end portion of the lower side portion 46B of the upper cover 46 has an extension portion 51 that extends outward in the left-right direction, entering the lateral retractable portion 50 of the headlight cover 27. With this configuration, the gap between the headlight cover 27 and the upper cover 46 is reduced, preventing straw from entering and easily avoiding poor straw transport.

[0243] [Positioning mechanism]

[0244] It includes a position holding mechanism 52 that keeps the upper cover 46 in the closed position. Figure 7 As shown, during main view, the position holding mechanism 52 is positioned corresponding to the various portions of the upper cover 46 that have upwardly recessed portions 47. The position holding mechanism 52 is configured such that a first component 53 located on the side of the upper cover 46 and a second component 54 located on the side of the drive shaft 34 attract each other magnetically to hold the upper cover 46 in position. That is, it is a structure where iron and a magnet attract each other magnetically. The first component 53 is made of iron, and the second component 54 is made of a permanent magnet.

[0245] like Figure 9 , 12 As shown, the upper cover 46 has reinforcing ribs 55 extending in the left-right direction on its back side. The reinforcing ribs 55 are formed integrally with the upper cover 46 at both the upper and lower parts of the back side of the upper cover 46. Each reinforcing rib 55 has a locking portion 56 for locking and retaining the first component 53.

[0246] The locking portion 56 is provided with an extension extending downward from the upper reinforcing rib 55, configured to lock and hold the first component 53 in a clamped state between the extension and the upper cover 46, and is also provided with an extension extending upward from the lower reinforcing rib 55, configured to lock and hold the first component 53 in a clamped state between the extension and the upper cover 46.

[0247] The first component 53 is formed by bending an iron plate into the shape of a locking part 56 that allows easy access to the upper and lower parts. The upper and lower entry recesses 58 and 60 are configured to clamp and hold the first component 53 in place by elastic deformation when the first component 53 is in place.

[0248] When viewed from the front, the first component 53 is positioned at a location corresponding to each of the multiple portions of the upper cover 46 that have upwardly recessed portions 47, that is, at a position corresponding to the left and right middle portions of adjacent drive transmission portions 35 among the multiple drive transmission portions 35. Furthermore, when viewed from the side, the first component 53 is positioned opposite the load-bearing drive shaft 34.

[0249] The second component 54 is made of a permanent magnet and is positioned opposite the first component 53, that is, at the position corresponding to the left and right middle portions of adjacent drive transmission units 35 among the plurality of drive transmission units 35. The second component 54 is mounted on the anti-winding cover 45 on the front side of the load-bearing drive shaft 34.

[0250] like Figure 10 , 11 As shown, the connecting pedestal 61, on which the second component 54 is fixedly mounted, is bolted together by abutting against the rear side of the anti-winding cover 45. When the pedestal 61 is mounted, the second component 54 protrudes forward through the insertion hole 62 formed in the anti-winding cover 45.

[0251] When the upper cover 46 is in the closed state, the first component 53 is positioned opposite and close to the second component 54. The first component 53 and the second component 54 are attracted to each other by magnetic force, thereby keeping the upper cover 46 in the closed state.

[0252] The position holding mechanism 52 is configured to release the position holding by a force that causes the upper cover 46 to swing upward. That is, the force attracted by the magnetic force is set to a level that can release the position holding by manually operating the upper cover 46 to swing upward.

[0253] The upper cover 46 is set to cover the upper front part of the rice-lifting device 13. The position holding mechanism 52 is configured such that when the rice-lifting device 13 is switched from the normal operating posture to the open posture, the force of attraction between the first component 53 and the second component 54 due to magnetic force is overcome, and the front surface 13a of the rice-lifting device 13 comes into contact with the object and the position holding is released.

[0254] [Direction Indicator]

[0255] The machine is equipped with left and right direction indicators 62R and 62L, located at the front of the fuselage. The right-side direction indicator 62R, one of the left and right direction indicators 62R and 62L, is located on the right side of the front of the cockpit 8, corresponding to the left and right directions. The left-side direction indicator 62L, the other direction indicator, is located on the left side of the front of the fuselage, corresponding to the opposite left and right directions, specifically on the left side of the cutting section 2. For example... Figure 8 As shown, the left-side direction indicator 62L is supported on a support body 72 connected to the cutting frame 20.

[0256] The right-side direction indicator 62R is supported by the front pillar 64 of the cab 8. A rearview mirror 65 is provided on the outer side of the cab 8, and the right-side direction indicator 62R is located below the lower end of the rearview mirror 65 and at the same height as the upper end of the threshing device 6. The right-side direction indicator 62R is positioned approximately at the same location in the left-right direction as the right-side headlight device 26.

[0257] An operating unit 67 is located on the right side of the front part of the cab 8. This operating unit 67 has a switching switch 66 that serves as an operating tool for switching the working states of the direction indicators 62R and 62L. The right-side direction indicator 62R is positioned at the same height as the operating unit 67 and corresponds to the lower end of the right side of the windshield 68 of the cab 8 when viewed from the front.

[0258] The right end of the cutting section 2 is located to the right and outside of the right end of the cab 8. Even with this structure, when the cutting section 2 is raised to the storage position, the direction indicator 62R on the right side can be viewed from the front.

[0259] The right-side direction indicator 62R is positioned higher than the cutting section 2 in the retracted position, so that it can be visually observed from the front of the machine when the cutting section 2 is raised to the retracted position. The right-side direction indicator 62R is positioned higher than the left-side direction indicator 62R even when the cutting section 2 is raised to the retracted position.

[0260] [Other Implementation Methods]

[0261] (1) In the above embodiment, the approach part 48 has a structure with a rearwardly curved surface 49 that is recessed toward the harvesting device 13. However, this structure can be replaced, for example, as shown in the following example. Figure 14 As shown, in the lower side portion 46B, an inclined surface 69 is formed as an approach portion 48, which is inclined in a manner that approaches the harvesting device 13 from the upper side portion 46A. Additionally, as... Figure 15 As shown, the approach portion 48 may also be formed with a forward-curved surface 70 that curves forward in a shape that bulges forward from the upper side portion 46A and approaches the load-bearing device 13.

[0262] (2) In the above embodiment, a structure in which an upwardly recessed portion 47 is formed in the upper cover 46 is adopted, but a structure in which such an upwardly recessed portion 47 is not formed may also be adopted.

[0263] (3) In the above embodiment, the upper cover 46 is positioned in a state of height difference relative to the front surface 13a of the supporting device 13, but it may not be in such a height difference, but rather it gradually moves forward as it gets higher.

[0264] (4) In the above embodiment, the approach part 48 is configured to be located at the upper side of the upper end of the feeder 13, but the approach part 48 may also be located at the lower side of the upper end of the feeder 13.

[0265] (5) In the above embodiment, it is possible to have a structure in which the headlight cover 27 has a lateral retracted portion 50 and the upper cover 46 has a protruding portion 51. However, instead of this structure, the inner side of the headlight cover 27 in the left and right directions and the outer side of the upper cover 46 are arranged in a straight line in the vertical direction.

[0266] Industrial applications

[0267] This invention can be applied to semi-feeding combine harvesters.

[0268] Third Implementation Method

[0269] Embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that in the following description, the direction of arrow "F" is designated as "front of the fuselage," and the direction of arrow "B" is designated as "rear of the fuselage" (see reference). Figure 16 Set the direction of arrow "L" to "left side of the aircraft" and the direction of arrow "R" to "right side of the aircraft" (see reference). Figure 17 ).

[0270] [Overall Structure]

[0271] like Figure 16 As shown, the combine harvester of the present invention includes a traveling body 1 and a cutting section 2 capable of harvesting seven upright rice stalks. The cutting section 2 is connected to the traveling body 1 in a manner that allows it to swing and rise around a horizontal axis P1, and is configured to be driven to rise and fall by a lifting hydraulic cylinder 3.

[0272] The machine body 1 has left and right tracked traveling devices 4, and a driver's section 5 is located on the right side (left-right side) at the front of the machine body. Behind the driver's section 5, arranged laterally along the machine body, are a threshing device 6 for threshing the stalks cut by the cutting section 2 and a grain bin 7 for storing the threshed grains. The driver's section 5 is covered by a driver's cab 8. Although not shown, the threshing device 6, while using a threshing supply chain 9 to clamp and transport the stalks from the cutting section 2, threshes the ear tips inside the threshing chamber, and uses a screening section located at the bottom of the threshing chamber to separate the grains into grains and dust. The grains are stored in the grain bin 7, and the dust is discharged outside the machine. A grain discharge device 10 is provided to discharge the grains stored in the grain bin 7 to the outside, and a chopping device 11 is provided to chop the threshed straw and discharge it outside the machine.

[0273] like Figure 16 ,17 As shown, the harvesting section 2 includes multiple (8) dividers 12, multiple (7) stalk lifting devices 13, a pusher-type cutter 14, and a conveying device 1. The multiple (8) dividers 12 are spaced apart in the left-right direction and are used to guide each row of planted rice stalks into 7 rice stalk guiding paths. The multiple (7) stalk lifting devices 13 are arranged in the left-right direction in a manner corresponding to each of the rice stalk guiding paths and lift the planted rice stalks. The cutter 14 cuts the stems and roots of the lifted planted rice stalks. The conveying device 15 causes the harvested rice stalks to merge in the harvesting width direction and be conveyed backward.

[0274] The cutting section 2 has a cutting frame 20 that supports the entire cutting section 2. The cutting frame 20 includes: a main frame 22 that extends from the body frame 21 toward the front of the body and is supported at the rear end so that it can swing up and down; a transverse frame 23 that extends in the left and right direction at the front end of the main frame 22; and a lifting transmission box 24 that extends from one end of the transverse frame 23 toward the top of the traveling body.

[0275] The hydraulic cylinder 3 is connected to the main frame 22 and the machine frame 4. The cutting part 2 is configured to be operated by swinging up and down by the hydraulic cylinder 3, thereby enabling it to reach various harvesting positions. Figure 16 The state shown by the solid line) and the retreat position as the maximum upward position above ( Figure 16 and Figure 17 The state shown by the imaginary line in the middle rises and falls.

[0276] The harvesting section 2 has left and right side covers 25 that cover the left and right sides of the multiple harvesting devices 13. Above the left and right side covers 25 are left and right headlight devices 26 and left and right headlight covers 27 that cover the headlight devices 26.

[0277] The headlight cover 27 is configured to cover the upper part of the headlight device 26 on the upper part of the left and right sides of the cutting section 2, as well as the upper part of the horizontal sides of the multiple crop-lifting devices 13 in the left and right directions. The left and right side covers 25 are configured to cover the lower part of the horizontal sides of the multiple crop-lifting devices 13 in the left and right directions.

[0278] [Grass-raising device]

[0279] The supporting device 13 is positioned in a tilted, upright posture, with the lower end located at the front of the machine body and the upper end further back. For example... Figure 17 As shown, the lifting device 13 has an annular rotating chain 32 wound and tensioned around the drive wheel 29 and tension wheel 30 mounted on the upper part of the lifting box 28, and the guide wheel 31 mounted on the lower part of the housing. Multiple lifting claws 33 are supported freely on the annular rotating chain 32 at a predetermined interval.

[0280] In the rice-lifting device 13, the upward movement path on the left and right sides of the annular rotating chain 32 is the rice-lifting path Q1, and the opposite side is the return path Q2. In the rice-lifting path Q1, a guide plate is provided at the point where the annular rotating chain 32 passes, guiding the lifting claw 33 to stand upright. In the rice-lifting path Q1, if the laterally protruding lifting claw 33 moves upward while combing the rice stalks, and reaches the end of the rice-lifting path Q1, it detaches from the rice stalks and is stored inside the rice-lifting box 28, then descends in the return path back to the rice-lifting action path side.

[0281] The machine includes a lifting drive shaft 34 that extends in a left-right direction above a plurality of lifting devices 13 and transmits power to each of the lifting devices 13. Regarding the transmission structure, although not shown, power from the machine body is transmitted to the lifting drive shaft 34 via a front-rear drive shaft located inside the main frame 22, a transverse drive shaft located inside the transverse frame 23, and a longitudinal drive shaft located inside the lifting transmission box 24.

[0282] Multiple drive transmission units 35 are provided at intervals in the left-right direction, and these multiple drive transmission units 35 branch off from the lifting drive shaft 34 to multiple lifting devices 13 to transmit power respectively. For example Figure 19 As shown, the drive transmission unit 35 is configured such that an upper bevel gear mechanism 37, a longitudinal transmission shaft 38 extending along the length of the box, a lower bevel gear mechanism 39, and a front-to-back transmission shaft 40 are built inside the longitudinally elongated drive box 36, transmitting power from the lifting drive shaft 34 to the drive wheel body 29 of the lifting device 13.

[0283] like Figure 18 As shown, a control support arm 41, which is bent into a mountain shape from the base boss of the cutting frame 20, extends forward to the upper part of the lifting device 13. A support frame 42, which extends in a left-right direction above the multiple lifting devices 13, is connected to the front end of the support arm 41. The support frame 42 is formed by bending a sheet metal and is connected to the front end of the support arm 41.

[0284] Multiple support brackets 43 are bolted to the support frame 42 at intervals along the left and right direction. The drive box 36 is fitted and supported on each support bracket 43 in a manner that allows it to swing up and down around the horizontal axis X1. A load-bearing drive shaft 34 is supported through the upper part of the drive box 36. The drive box 36 is supported so that it can swing up and down around the axis X1 of the load-bearing drive shaft 34.

[0285] The crop-lifting device 13 is connected to the drive housing 36 in a state where it can swing as a whole. The crop-lifting device 13 is configured to swing up and down about the axis X of the crop-lifting drive shaft 34, such as... Figure 18 , 19As shown, it is able to perform the normal action posture of lifting rice stalks ( Figure 19 (represented by solid lines in the middle) and an open posture that swings upwards to open up the rear side space ( Figure 19 Switching between attitudes (represented by imaginary lines). Equipped with an air damper 44 for maintaining position in the open attitude.

[0286] like Figure 19 , 20 As shown, an anti-winding cover 45 is provided in the area sandwiched by the drive transmission section 35 separated in the left and right directions, at a position corresponding to the top of the lifting path Q1, so as to cover the front side and the lower side of the lifting drive shaft 34. The left and right sides of the anti-winding cover 45 are bolted to the support bracket 43.

[0287] [Upper Cover]

[0288] like Figure 17 , 18 As shown in Figure 19, an upper cover 46 covers the front side of the crop-lifting drive shaft 34. The upper cover 46 is provided to extend horizontally from the left end of the crop-lifting device 13 to the right end of the crop-lifting device 13. The upper cover 46 is made of resin material and is supported on the crop-lifting device 13 in a manner that allows it to swing up and down around the upper horizontal axis X2 in both the closed state covering the front side of the crop-lifting drive shaft 34 and the open state opening the front side of the crop-lifting drive shaft 34.

[0289] In the upper cover 46, an upwardly recessed portion 47 is formed at a position corresponding to the upper part of the lifting path Q1 of each of the plurality of lifting devices 13. Therefore, it is easy to avoid the upper part of the planted rice stalks lifted by the lifting device 13 interfering with the upper cover 46, which would result in poor rice stalk transport.

[0290] The upper side portion 46A of the upper cover 46 is positioned closer to the front side at a different height than the front surface 13a of the rice-lifting device 13, and the lower side portion 46B of the upper cover 46, which is lower than the rice-lifting drive shaft 34, has an approach portion 48 that approaches the rice-lifting device 13. Figure 19 , 22 As shown, the approach portion 48 is composed of a rearward curved surface 49, which curves backward and retracts to the lower side portion 46B of the upper cover 46 in a manner that approaches the supporting device 13.

[0291] An approach portion 48 is provided in the lower side portion 46B of the upper cover 46, corresponding to the upper part of the return path Q2 of each of the plurality of crop-lifting devices 13. The portion of the upper cover 46 corresponding to the upper part of the return path Q2 is wider in the vertical direction and extends to a position lower than the upper end of the crop-lifting device 13. The approach portion 48 is provided midway in the vertical direction of this wide extension portion.

[0292] The approach part 48 is located at the upper part of the upper end of the rice stalk lifting device 13. That is, a rearwardly curved surface 49 is formed at the upper part of the upper end of the rice stalk lifting device 13, which is recessed towards the rice stalk lifting device 13. As a result, even if the tip of the rice stalk lifted by the rice stalk lifting device 13 rests against the part corresponding to the upper part of the return path Q2, it is easy to avoid interference with the upper cover 46 and poor rice stalk conveying.

[0293] like Figure 23 As shown, the portion of the headlight cover 27 located on the inner left-right side, adjacent to the lower side portion 46B of the upper cover 46, has a lateral retractable portion 50 that retracts outward in the left-right direction when viewed from the front. Furthermore, the outer left-right end portion of the lower side portion 46B of the upper cover 46 has an extension portion 51 that extends outward in the left-right direction, entering the lateral retractable portion 50 of the headlight cover 27. With this configuration, the gap between the headlight cover 27 and the upper cover 46 is reduced, preventing straw from entering and easily avoiding poor straw transport.

[0294] [Positioning mechanism]

[0295] It includes a position holding mechanism 52 that keeps the upper cover 46 in the closed position. Figure 17 As shown, during main view, the position holding mechanism 52 is positioned corresponding to the various portions of the upper cover 46 that have upwardly recessed portions 47. The position holding mechanism 52 is configured such that a first component 53 located on the side of the upper cover 46 and a second component 54 located on the side of the drive shaft 34 attract each other magnetically to hold the upper cover 46 in position. That is, it is a structure where iron and a magnet attract each other magnetically. The first component 53 is made of iron, and the second component 54 is made of a permanent magnet.

[0296] like Figure 19 , 22 As shown, the upper cover 46 has reinforcing ribs 55 extending in the left-right direction on its back side. The reinforcing ribs 55 are formed integrally with the upper cover 46 at both the upper and lower parts of the back side of the upper cover 46. Each reinforcing rib 55 has a locking portion 56 for locking and retaining the first component 53.

[0297] The locking portion 56 is provided with an extension extending downward from the upper reinforcing rib 55, configured to lock and hold the first component 53 in a clamped state between the extension and the upper cover 46, and is also provided with an extension extending upward from the lower reinforcing rib 55, configured to lock and hold the first component 53 in a clamped state between the extension and the upper cover 46.

[0298] The first component 53 is formed by bending an iron plate into the shape of a locking component 56 that allows easy access to the upper and lower parts. The upper and lower entry recesses 58 and 60 are configured to clamp and hold the first component 53 in place by elastic deformation when the first component 53 is in place.

[0299] When viewed from the front, the first component 53 is positioned at a location corresponding to each of the multiple portions of the upper cover 46 that have upwardly recessed portions 47, that is, at a position corresponding to the left and right middle portions of adjacent drive transmission portions 35 among the multiple drive transmission portions 35. Furthermore, when viewed from the side, the first component 53 is positioned opposite the load-bearing drive shaft 34.

[0300] The second component 54 is made of a permanent magnet and is positioned opposite the first component 53, that is, at the position corresponding to the left and right middle portions of adjacent drive transmission units 35 among the plurality of drive transmission units 35. The second component 54 is mounted on the anti-winding cover 45 on the front side of the load-bearing drive shaft 34.

[0301] like Figure 20 , 21 As shown, the connecting pedestal 61, on which the second component 54 is fixedly mounted, is bolted together by abutting against the rear side of the anti-winding cover 45. When the pedestal 61 is mounted, the second component 54 protrudes forward through the insertion hole 62 formed in the anti-winding cover 45.

[0302] When the upper cover 46 is in the closed state, the first component 53 is positioned opposite and close to the second component 54. The first component 53 and the second component 54 are attracted to each other by magnetic force, thereby keeping the upper cover 46 in the closed state.

[0303] The position holding mechanism 52 is configured to release the position holding by a force that causes the upper cover 46 to swing upward. That is, the force attracted by the magnetic force is set to a level that can release the position holding by manually operating the upper cover 46 to swing upward.

[0304] The upper cover 46 is set to cover the upper front part of the rice-lifting device 13. The position holding mechanism 52 is configured such that when the rice-lifting device 13 is switched from the normal operating posture to the open posture, the force of attraction between the first component 53 and the second component 54 due to magnetic force is overcome, and the front surface 13a of the rice-lifting device 13 comes into contact with the object and the position holding is released.

[0305] [Direction Indicator]

[0306] The machine is equipped with left and right direction indicators 62R and 62L, located at the front of the fuselage. The right-side direction indicator 62R, one of the left and right direction indicators 62R and 62L, is located on the right side of the front of the cockpit 8, corresponding to the left and right directions. The left-side direction indicator 62L, the other direction indicator, is located on the left side of the front of the fuselage, corresponding to the opposite left and right directions, specifically on the left side of the cutting section 2. For example... Figure 18 As shown, the left-side direction indicator 62L is supported on a support body 72 connected to the cutting frame 20.

[0307] The right-side direction indicator 62R is supported by the front pillar 64 of the cab 8. A rearview mirror 65 is provided on the outer side of the cab 8, and the right-side direction indicator 62R is located below the lower end of the rearview mirror 65 and at the same height as the upper end of the threshing device 6.

[0308] An operating unit 67 is located on the right side of the front part of the cab 8. This operating unit 67 has a switching switch 66 that serves as an operating tool for switching the working states of the direction indicators 62R and 62L. The right-side direction indicator 62R is positioned at the same height as the operating unit 67 and corresponds to the lower end of the right side of the windshield 68 of the cab 8 when viewed from the front.

[0309] The right end of the cutting section 2 is located to the right and outside of the right end of the cab 8. Even with this structure, when the cutting section 2 is raised to the storage position, the direction indicator 62R on the right side can be viewed from the front.

[0310] The right-side direction indicator 62R is positioned higher than the cutting section 2 in the retracted position, so that it can be visually observed from the front of the machine when the cutting section 2 is raised to the retracted position. The right-side direction indicator 62R is positioned higher than the left-side direction indicator 62R even when the cutting section 2 is raised to the retracted position.

[0311] [Other Implementation Methods]

[0312] (1) In the above embodiment, the first component 53 is made of iron and the second component 54 is made of magnet. However, this structure can be replaced by a structure in which the first component 53 is made of magnet and the second component 54 is made of iron. Alternatively, both the first component 53 and the second component 54 can be made of magnet.

[0313] (2) In the above embodiment, the first component 53 and the second component 54 are configured to be located at positions corresponding to the left and right middle portions of the adjacent drive transmission portion 35, but they may also be configured to be located between the drive transmission portion 35 and the back of the upper cover 46.

[0314] (3) In the above embodiment, the reinforcing rib 55 provided on the back of the upper cover 46 is provided with a locking part 56. However, instead of this structure, the upper cover 46 is provided with a dedicated bracket for supporting the first component 53, and the bracket is provided with a locking part.

[0315] (4) In the above embodiment, the anti-winding cover 45 is configured to cover the front side and the lower side of the load-bearing drive shaft 34 and the second component 54 is provided on the anti-winding cover 45. However, instead of this structure, it can be configured to have a cylindrical housing that covers the entire circumference of the drive shaft 34 and the second component 54 is provided on the cylindrical housing.

[0316] (5) In the above embodiment, the position holding mechanism 52 is a structure in which the first component 53 and the second component 54 attract each other by magnetic force. However, instead of this structure, as long as it is a structure that is decoupled in accordance with the posture change of the lifting device 13, the position can also be maintained by the engagement of the components. Various structures can be used as the position holding mechanism 52.

[0317] (6) In the above embodiment, a structure in which an upwardly recessed portion 47 is formed in the upper cover 46 is adopted, but a structure in which such an upwardly recessed portion 47 is not formed may also be adopted.

[0318] (7) In the above embodiment, the approach part 48 has a structure with a rearwardly curved surface 49 that is recessed toward the harvesting device 13. However, this structure can be replaced, for example, as shown in the following example. Figure 24 As shown, in the lower side portion 46B, an inclined surface 69 is formed as an approach portion 48, which is inclined in a manner that approaches the harvesting device 13 from the upper side portion 46A. Additionally, as... Figure 25 As shown, the approach portion 48 may also be formed with a forward-curved surface 70 that curves forward in a shape that bulges forward from the upper side portion 46A and approaches the load-bearing device 13.

[0319] Industrial applications

[0320] This invention can be applied to semi-feeding combine harvesters.

Claims

1. A combine harvester, characterized in that, have: Multiple dividers are arranged side by side in the left-right direction, forming multiple straw feeding paths; Multiple straw-supporting devices are provided, which are corresponding to the multiple straw-introducing paths, and support the straws. A drive shaft extends in a left-right direction across the upper part of the plurality of rice-lifting devices and provides power to the rice-lifting devices; as well as Axle box, which covers the drive shaft from the front, The rice-lifting device includes: a rice-lifting mechanism having an annular rotating body and a plurality of claws mounted on the annular rotating body; and a rice-lifting box extending downward from the lower end of the shaft box, which covers the return path of the rice-lifting device and the annular rotating body from the front while exposing the conveying path of the rice-lifting device. An upwardly recessed portion is formed at the lower end of the section of the shaft box corresponding to the conveying path. When viewed from the front, the recessed length of the recess is smaller than the distance between the lower end of the portion of the axle housing without the recess and the drive shaft. The width of the lower end of the recess is wider than the distance between two adjacent load-bearing boxes that sandwich the conveying path.

2. The combine harvester as described in claim 1, characterized in that, The width of the central portion of the recess in the vertical direction is equal to the distance between the two adjacent load-bearing boxes sandwiching the conveying path.

3. The combine harvester as described in claim 1 or 2, characterized in that, In the axle box, a plurality of recesses are formed in a state corresponding to the plurality of conveying paths. The total left and right width of one or more of the harvesting boxes disposed between two adjacent recesses in the left and right direction is equal to the interval between the two recesses.

4. The combine harvester as described in claim 1 or 2, characterized in that, When the claw is at its highest position within its range of motion, it is located near the axle box when viewed from the front.

5. The combine harvester as described in claim 1 or 2, characterized in that, When viewed from the front, the recessed length of the recess is longer than half the distance between the lower end of the portion of the axle box in which the recess is not formed and the drive shaft.

6. A combine harvester, characterized in that, The front of the machine has a harvesting section for harvesting planted rice stalks. The harvesting section includes: a plurality of crop-lifting devices arranged in a left-right direction; a crop-lifting drive shaft extending in a left-right direction above the plurality of crop-lifting devices and transmitting power to each of the crop-lifting devices; and an upper cover covering the front side of the crop-lifting drive shaft. The upper part of the upper cover is positioned forward of the front surface of the rice-lifting device when viewed from the side, and the lower part of the upper cover, which is below the rice-lifting drive shaft, has an approach portion that moves towards the rice-lifting device. An upwardly recessed portion is formed in the lower side portion, corresponding to the position above the straw-lifting path of each of the plurality of straw-lifting devices. The width of the lower end of the upward-facing recess is wider than the distance between two adjacent straw-lifting devices that sandwich the straw-lifting path.

7. The combine harvester as described in claim 6, characterized in that, When viewed from the side, the upper cover is positioned at a different height relative to the front surface of the rice-raising device and is located towards the front.

8. The combine harvester as described in claim 6 or 7, characterized in that, The approach portion has a rearward curved surface that, when viewed from the side, curves in a rearward bulging shape as it approaches the rice-raising device.

9. The combine harvester as described in claim 6 or 7, characterized in that, An inclined surface is formed in the approach portion, which is inclined in a manner that approaches the rice-raising device when viewed from the side.

10. The combine harvester as described in claim 6 or 7, characterized in that, A forward-curving surface is formed in the approach portion, which, when viewed from the side, curves forward in a bulging shape as it approaches the rice-raising device.

11. The combine harvester as described in claim 6 or 7, characterized in that, The approach portion is provided in the lower side portion, corresponding to the position above the return path of each of the plurality of harvesting devices.

12. The combine harvester as described in claim 6 or 7, characterized in that, The approach portion is located above the upper end of the rice-lifting device.

13. The combine harvester as described in claim 6 or 7, characterized in that, The plurality of harvesting devices are provided with headlights and headlight covers on their lateral sides in the left and right directions. The portion of the headlight cover adjacent to the lower side portion in the left-right inner direction has a lateral retracted portion that retracts outward in the left-right direction when viewed from the front. The lower side portion has a protrusion at its left and right outer ends, which extends outward in the left and right directions in such a way that it enters the lateral retracted portion when viewed from the front.

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