CN113826489A - Combine harvester - Google Patents

Abstract

The invention provides a combine harvester which can reliably protect a driving shaft and is not easy to cause poor conveying of grain and stalks. The disclosed device is provided with: a drive shaft (33) extending in the left-right direction in a state of crossing the upper parts of the plurality of grain lifting devices (13) and supplying power to the grain lifting devices (13); an axle box (39) for covering the drive shaft (33) from the front, wherein the grain lifting device (13) comprises: a grain lifting mechanism (24) which is provided with an annular rotating body (31) and a plurality of claw parts (32) arranged on the annular rotating body (31); and a grain-supporting box (27) which extends downward from the lower end of the axle box (39), covers the return path T2 of the grain-supporting device (13) and the grain-supporting box (27) of the annular rotating body (31) from the front in a state that the conveying path T1 of the grain-supporting device (13) is exposed, wherein a concave part (40) which is concave towards the upper side is formed at the lower end part of the axle box (39) corresponding to the conveying path T1, and the concave length D1 of the concave part (40) is shorter than the interval between the lower end of the part of the axle box (39) where the concave part (40) is not formed and the driving shaft 33) in the front view.

Description

Combine harvester

Technical Field

The first aspect of the present invention relates to a combine harvester including a plurality of grain dividers arranged side by side in the left-right direction and forming a plurality of straw introduction paths.

The second and third aspects of the present invention relate to a combine harvester which is provided with a harvesting part in the front of a machine body for harvesting standing grain stalks and a plurality of grain lifter devices arranged in the left-right direction in the harvesting part.

Background

As a first aspect of the present invention, a combine harvester described in patent document 1, for example, is known as the combine harvester described above. The combine harvester includes a plurality of grain lifting devices (a "grain lifting device" in patent document 1) for lifting up planted grain stalks.

In addition, this combine harvester is provided with a drive shaft (referred to as a "grain-lifting drive shaft" in patent document 1) for powering the grain-lifting device. The driving shaft extends in the left-right direction in a state of crossing the upper parts of the plurality of grain lifting devices. In addition, the driving shaft is accommodated in a grain lifting transmission cylinder extending in the left-right direction.

In a second aspect of the present invention, the combine harvester is provided with a grain-supporting drive shaft extending in the left-right direction while being positioned above the plurality of grain-supporting devices and transmitting power to each of the plurality of grain-supporting devices, and the front side of the grain-supporting drive shaft is covered with an upper cover. Conventionally, the upper cover is disposed in a posture substantially along the front surface of the grain lifter over the entire width in the vertical direction (see, for example, patent document 2).

In the third aspect of the present invention, the combine harvester is provided with a grain-supporting drive shaft extending in the left-right direction while being positioned above the plurality of grain-supporting devices and transmitting power to each of the plurality of grain-supporting devices, and the front side of the grain-supporting drive shaft is covered with the upper cover. Further, conventionally, there is a structure as follows: the upper cover is supported so as to be vertically swingable around a horizontal axis so as to be capable of changing the posture 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 holds the position of the elastic engagement type clip in the closed state by sandwiching it between the fixed-side mounting pins (see, for example, patent document 3).

Patent document 1: japanese patent application laid-open No. 2010-4841

Patent document 2: japanese laid-open patent application No. 2010-104258

Patent document 3: japanese laid-open patent publication No. 2012-29569

Disclosure of Invention

In the first aspect of the present invention, in the combine harvester described in patent document 1, it is conceivable to provide an axle box covering the drive shaft from the front side instead of the grain-lifting transmission cylinder. This protects the drive shaft from the axle box, and allows easy access to the drive shaft only by removing the axle box.

However, when the standing grain straw is a long-straw variety, it is assumed that the axle box interferes with the upper portion of the standing grain straw lifted by the grain lifter. Thus, the upper portion of the planted grain straw is bent forward, and poor transportation of the grain straw is likely to occur.

A first object of the present invention is to provide a combine harvester capable of reliably protecting a drive shaft and preventing poor conveyance of grain and straw.

The present invention is characterized by comprising: a plurality of grain dividers arranged in parallel in the left-right direction and forming a plurality of grain and straw introduction paths; a plurality of grain lifting devices which are arranged corresponding to the plurality of grain stalk guiding paths and lift up the standing grain stalks; a driving shaft extending in a left-right direction in a state of crossing upper portions of the plurality of grain lifting devices and providing power to the grain lifting devices; and an axle box covering the drive shaft from the front, the grain lifting device having: a grain lifting mechanism having an annular rotating body and a plurality of claw portions mounted on the annular rotating body; and a grain-supporting box extending downward from a lower end of the axle box and covering the return path of the grain-supporting device and the annular rotating body from the front in a state where the conveying path of the grain-supporting device is exposed, wherein a recessed portion recessed upward is formed at a lower end portion of a portion of the axle box corresponding to the conveying path, and a recessed length of the recessed portion is smaller than a distance between a lower end of a portion of the axle box where the recessed portion is not formed and the drive shaft in a front view.

According to the present invention, a recessed portion recessed upward is formed in a lower end portion of a portion of the axle box corresponding to the conveying path. Therefore, the upper part of the vertical grain-planting stalk lifted by the grain-lifting device is not easy to interfere with the axle box. Therefore, the poor transportation of the grain straw caused by the interference between the upper part of the planted grain straw and the axle box can be easily avoided.

Further, according to the present invention, the recessed length of the recess is shorter than the interval between the lower end of the portion of the axle box where the recess is not formed and the drive shaft in the front view. Thus, the lower end of the portion of the casing in which the recess is formed is positioned below the drive shaft in the front view. That is, the drive shaft is hidden by the axle boxes over the entire left and right lengths of the axle boxes in the front view. As a result, the drive shaft is reliably protected by the axle box.

That is, according to the present invention, it is possible to realize a combine harvester that reliably protects the drive shaft and is less likely to cause poor conveyance of grain stalks.

Further, in the present invention, it is preferable that the left-right width of the concave portion is equal to the interval of 2 grain-lifting boxes adjacent to each other across the conveying path.

The smaller the lateral width of the recess, the higher the strength of the axle box becomes.

Therefore, according to the above configuration, the strength of the axle box is easily increased as compared with the case where the lateral width of the recessed portion is larger than the interval between the 2 grain-lifting boxes adjacent to each other via the conveying path.

Further, when the left-right width of the recess is smaller than the interval between the 2 grain-supporting boxes adjacent to each other across the conveying path, a step is easily formed by the grain-supporting boxes and the axle boxes. When the grain stalks are hooked on the steps, poor conveyance of the grain stalks is likely to occur.

Here, according to the above-described structure, it is difficult to form a step by the grain-lifting box and the axle box. Therefore, the poor conveying of the grain stalks caused by the fact that the grain stalks are hooked on the steps can be easily avoided.

Further, in the present invention, it is preferable that a plurality of the concave portions are formed in the shaft box in a state corresponding to a plurality of the conveying paths, and a total of left and right widths of 1 or a plurality of the grain-lifting boxes provided between 2 concave portions adjacent to each other in the left and right direction is equal to an interval between the 2 concave portions.

In the axle box, the strength of the axle box is likely to be increased as the lateral width of the portion where the recess is not formed is increased.

Here, according to the above-described structure, the left-right width of the portion of the shaft box where no recess is formed is equal to the sum of the left-right widths of 1 or more grain-lifting boxes provided between 2 recesses adjacent to each other in the left-right direction. Therefore, the strength of the axle box is likely to be higher than in the case where the lateral width of the portion of the axle box where no recess is formed is smaller than the total of the lateral widths of 1 or more grain-lifting boxes provided between 2 recesses adjacent to each other in the lateral direction.

In addition, when the total of the left-right widths of 1 or a plurality of grain-supporting boxes provided between 2 recesses adjacent to each other in the left-right direction is smaller than the interval between the 2 recesses, it is easy to form a step by the grain-supporting boxes and the axle boxes. When the grain stalks are hooked on the steps, poor conveyance of the grain stalks is likely to occur.

Here, according to the above-described structure, it is difficult to form a step by the grain-lifting box and the axle box. Therefore, the poor conveying of the grain stalks caused by the fact that the grain stalks are hooked on the steps can be easily avoided.

In the present invention, it is preferable that the claw portion is located in the vicinity of the axle box in a front view when the claw portion is located at the highest position within a moving range of the claw portion.

According to this configuration, the portion of the shaft box where the recess is not formed extends downward to the vicinity of the claw portion when the portion is located at the highest position. Thereby, the drive shaft is reliably protected by the axle box.

Further, in the present invention, it is preferable that a recessed length of the recessed portion is longer than a half of an interval between a lower end of a portion of the shaft housing where the recessed portion is not formed and the drive shaft in a front view.

According to this configuration, the recessed length of the recessed portion is longer in front view than in the case where the recessed length of the recessed portion is shorter than half of the interval between the lower end of the portion of the axle box where the recessed portion is not formed and the drive shaft. Thus, it is easy to more reliably avoid interference of the upper part of the standing grain stalk supported by the grain supporting device with the axle box. As a result, it is possible to more reliably avoid the occurrence of poor conveyance of the grain stalks due to interference between the upper portions of the planted grain stalks and the axle boxes.

With 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 grain lifting device, and the crop is less likely to be caught between the upper cover and the front surface of the grain lifting device to cause stagnation of the crop. However, in the above-described conventional structure, the space between the upper cover and the grain-lifting drive shaft is narrowed, and there is a disadvantage that the degree of freedom of installation is lowered when a member for supporting the upper cover is provided.

Therefore, it is desired to improve the degree of freedom in the arrangement of the components between the upper cover and the grain-lifting drive shaft while satisfactorily conveying the lifted crop to the rear.

A combine according to a second aspect of the present invention is a combine including a harvesting unit for harvesting a planted straw at a front portion of a body, the harvesting unit including: a plurality of grain lifting devices arranged along the left and right direction; a grain lifting drive shaft which extends in the left-right direction in a state of being positioned above the plurality of grain lifting devices and transmits power to the plurality of grain lifting devices respectively; and an upper cover covering the front side of the grain lifting drive shaft, wherein the upper cover is provided at an upper side portion thereof so as to be positioned on the front side of the front surface of the grain lifting device in side view, and a lower side portion thereof on the lower side of the grain lifting drive shaft is provided with an approaching portion approaching the grain lifting device.

According to the present invention, the upper portion side portion of the upper cover is provided in a state of being located on the front side with respect to the front surface of the grain lifter, and the space between the upper cover and the grain lifter drive shaft is in a state of being expanded in the front-rear direction. As a result, when a member is provided between the upper cover and the grain lifting drive shaft, the degree of freedom of installation can be improved. Since the lower side portion of the upper cover is brought into a state of being close to the grain lifter by the close portion, a gap is not generated between the upper cover and the front surface of the grain lifter, and the possibility of occurrence of poor crop conveyance is low.

Therefore, the crop can be conveyed well, and the degree of freedom in the arrangement of the components between the upper cover and the grain lifting drive shaft can be improved.

In the present invention, it is preferable that the upper cover is located at a position on the front side of the front surface of the grain lifter in a height-varying manner in a side view.

According to this configuration, the upper portion side portion of the upper cover is brought into a state close to the front, and a large space is formed between the upper cover and the grain-lifting drive shaft, thereby further improving the degree of freedom in the arrangement of the components.

In the present invention, it is preferable that the approaching portion is formed with a backward curved surface that approaches the grain lifter while being curved in a shape bulging backward in a side view.

According to this configuration, the recessed portion of the upper cover can be rapidly inserted rearward, and the downward position thereof is less changed, thereby increasing the insertion amount in the front-rear direction. Since the lower portion is recessed so as to approach the grain lifter, the lower portion is less likely to protrude forward, and is less likely to contact the crop.

In the present invention, it is preferable that an inclined surface that is inclined so as to approach toward the grain lifter in a side view is formed at the approach portion.

According to this configuration, since the upper cover can be handled by simple processing of forming the inclined surface, the number of processing steps is reduced.

In the present invention, it is preferable that the approaching surface is formed with a forward curved surface that approaches the grain lifter while being curved in a shape bulging forward in a side view.

According to this configuration, the portion forming the curved surface of the upper cover rapidly enters rearward, and the position of the portion facing downward changes little, but the amount of entry in the front-rear direction can be increased. Because of the forward bulging shape, the space between the upper cover and the grain-lifting drive shaft can be enlarged at the lower part.

In the present invention, it is preferable that an upwardly concave portion which is concave upward is formed in a portion of the lower side portion corresponding to an upper portion of the grain-stalk supporting path of each of the plurality of grain-supporting devices,

the approaching portion is provided at a portion of the lower portion side portion corresponding to an upper portion of the return path of each of the plurality of grain lifter devices.

According to the present invention, since the upward concave portion is formed above the grain stalk lifting path, the possibility that the ear tip side of the crop is damaged by contact with the upper cover is reduced even for a tall crop. Further, even if the tall crop leans toward the upper side portion of the return path, since the approaching portion is provided, the possibility of occurrence of the conveyance failure of the crop is small.

In the present invention, it is preferable that the approaching portion is located at an upper side than an upper end position of the grain lifter.

According to this configuration, the upper cover is located below the approach portion and is in a state of approaching the front surface of the grain lifter. As a result, the gap between the upper cover and the front surface of the grain lifter is reduced, and the crop can be smoothly conveyed.

In the present invention, it is preferable that the plurality of grain lifter devices include a headlight and a headlight cover covering the headlight on both lateral sides in the left-right direction, the headlight cover includes a laterally retracted portion that is retracted outward in the left-right direction in a front view at a portion adjacent to the lower portion in a laterally inner portion, and the headlight cover includes a laterally protruding portion that protrudes outward in the left-right direction so as to enter the laterally retracted portion in a front view at a laterally outer end portion in the lower portion.

According to this configuration, the space formed by the lateral retraction portion of the headlamp cover can be filled with the extension portion of the upper cover, and the gap between the headlamp cover and the upper cover can be reduced, thereby smoothly transporting crops.

In the third aspect of the present invention, in the above-described conventional structure, the upper cover can be prevented from being unintentionally opened and closed by rattling of the upper cover due to the influence of vibrations of the body, wind, or the like, by the engagement and holding of the clip. However, when performing maintenance work of the grain lifter or the inside of the machine body, it is necessary to switch the grain lifter to the open state after releasing the position holding of the clamp by swinging the upper cover upward and switching the upper cover to the open state.

As a result, in addition to the operation of switching the grain lifter to the open state, the operation of switching the upper cover to the open state against the locking and holding force of the clamp is required, which is troublesome.

Therefore, it is desirable to prevent the upper cover from being opened and closed accidentally and to perform maintenance work without trouble.

A combine according to a third aspect of the present invention is characterized in that a harvesting unit for harvesting the planted straw is provided in a front portion of the body, and the harvesting unit is provided with: a plurality of grain lifting devices arranged along the left and right direction; a drive shaft extending in the left-right direction in a state of being located above the plurality of grain lifting devices, and transmitting power to the plurality of grain lifting devices, respectively; and an upper cover that covers a front side of the drive shaft, the grain lifter being supported so as to be vertically swingable around an axis of the drive shaft, and being configured so as to be capable of switching a posture between a normal operation posture in which grain stalk is lifted and an open posture in which the grain lifter is swung upward to open a rear side space, the upper cover being supported by the grain lifter so as to be vertically swingable around a lateral axis of an upper portion between a closed state in which the front side of the drive shaft is covered and an open state in which the front side of the drive shaft is opened, the upper cover being provided with a position holding mechanism that holds a position of the upper cover in the closed state, the position holding mechanism being configured so that a front surface of the grain lifter abuts and releases the position holding when the grain lifter is switched from the normal operation posture to the open posture.

According to the present invention, since the position of the upper cover is held in the closed state by the position holding mechanism during the harvesting operation, the upper cover can be prevented from being unintentionally opened and closed by being shaken due to the influence of the vibration of the machine body, wind, and the like. The grain lifter is switched to the open posture by swinging up and down around the axis of the driving shaft, so that the maintenance operation in the machine body can be easily carried out. When the grain lifter is switched from the normal operation posture to the open posture for the maintenance work, the cover member is switched to the open state in association with this. At this time, the front surface of the grain lifter abuts against the upper cover and the upper cover swings in conjunction with this, and the position holding mechanism releases the position holding. As a result, there is no need to perform operations such as the posture switching operation of the grain lifter and the posture switching operation of the upper cover.

Therefore, the upper cover can be prevented from being opened and closed accidentally, and maintenance work can be performed without trouble.

In the present invention, it is preferable that in the position holding mechanism, a first member provided on the upper cover side and a second member provided on the drive shaft side attract each other by a magnetic force, thereby holding the position of the upper cover.

According to this configuration, the first member and the second member are attracted to each other by a magnetic force, and the position of the upper cover is held in the closed state. When the grain lifter is switched from the normally acting posture to the opening posture, the first component and the second component are separated against the magnetic force through the operating force of the grain lifter. The magnetic force may be a force to such an extent that the upper cover does not open or close accidentally during the harvesting operation, and the magnetic force can be easily separated by the operating force accompanying the posture change of the grain lifter.

Further, if the position is held by magnetic force, the position holding is more difficult to be released than the mechanical locking and holding, and the position holding is easily and smoothly released.

In the present invention, it is preferable that the position holding mechanism is configured such that the iron material and the magnet attract each other by a magnetic force.

According to this configuration, one of the first member and the second member is made of an iron material, so that the configuration can be simplified as compared with a case where both are made of magnets.

In the present invention, it is preferable that the first member is an iron material and the second member is a magnet.

According to this configuration, since the first member made of an iron material is provided on the upper cover side, even when the upper cover is made of a resin material, for example, it is possible to cope with this by a simple support structure without using a fastening structure such as a bolt.

In the present invention, it is preferable that a locking portion for locking and holding the first member is provided on a back surface of the upper cover.

According to this configuration, since the first member is locked and held, the upper cover can be easily attached and detached.

In the present invention, it is preferable that a reinforcing rib extending in the left-right direction is provided on the rear surface of the upper cover, and the locking portion is provided on the reinforcing rib.

According to this structure, the strength of the upper cover can be enhanced by providing the reinforcing rib. Further, by effectively utilizing the reinforcing rib, the engaging portion can be handled with a simple structure.

In the present invention, it is preferable that a plurality of drive transmission portions, which transmit power to the plurality of grain lifters from the drive shaft, are provided at intervals in the left-right direction, and the first member is provided at a position corresponding to a left-right intermediate portion of the adjacent drive transmission portion.

According to this configuration, focusing on the fact that the drive transmission portion for transmitting power to the plurality of grain lifter devices is provided at a left-right interval, the first member can be compactly arranged by effectively utilizing the vacant region of the left-right intermediate portion of the drive transmission portion.

In the present invention, it is preferable that the first member is provided at a position facing the drive shaft.

According to this configuration, since the upper cover is held in position at a position facing the drive shaft, the upper cover can maintain a good gap from the drive shaft, and can prevent the upper cover from approaching the drive shaft even if the upper cover is pressed backward by contact with a foreign object.

In the present invention, it is preferable that the second member is provided in a cover member which is positioned in front of the drive shaft and covers the drive shaft.

According to this configuration, the drive shaft is covered with the cover member so as not to wind the crop by the rotation. Therefore, the second member can be attached by the cover member effectively.

In the present invention, it is preferable that a plurality of drive transmission portions, which transmit power to the plurality of grain lifters from the drive shaft, are provided at intervals in the left-right direction, and the second member is provided at a position corresponding to a left-right intermediate portion of the adjacent drive transmission portion.

According to this configuration, focusing on the fact that the drive transmission portion for transmitting power to the plurality of grain lifter devices is provided at a left-right interval, the second member can be compactly arranged by effectively utilizing the vacant region of the left-right intermediate portion of the drive transmission portion.

Drawings

First embodiment

Fig. 1 is a left side view of the combine harvester.

Fig. 2 is a top view of the combine.

Fig. 3 is a side view of the cutout.

Fig. 4 is a front view of the cutting section.

Fig. 5 is a front view showing a structure of an axle box or the like.

Second embodiment

Fig. 6 is a side view of the combine.

Fig. 7 is a front view of the combine harvester.

Fig. 8 is a side view showing the supporting structure of the grain lifter.

Fig. 9 is a vertical sectional side view of the upper cover arrangement portion.

Fig. 10 is a perspective view showing an attached state of the second member.

Fig. 11 is a cross-sectional plan view showing the mounted state of the second member.

Fig. 12 is a perspective view showing an attached state of the first member.

Fig. 13 is a front view of the left end portion of the upper cover.

Fig. 14 is a vertical sectional side view of an upper cover arrangement part according to another embodiment.

Fig. 15 is a vertical sectional side view of an upper cover arrangement part according to another embodiment.

Third embodiment

Fig. 16 is a side view of the combine.

Fig. 17 is a front view of the combine harvester.

Fig. 18 is a side view showing a supporting structure of the grain lifter.

Fig. 19 is a vertical sectional side view of the upper cover arrangement portion.

Fig. 20 is a perspective view showing an attached state of the second member.

Fig. 21 is a cross-sectional plan view showing the mounted state of the second member.

Fig. 22 is a perspective view showing an attached state of the first member.

Fig. 23 is a front view of the left end portion of the upper cover.

Fig. 24 is a vertical sectional side view of an upper cover arrangement part according to another embodiment.

Fig. 25 is a vertical sectional side view of an upper cover arrangement part of another embodiment.

Description of the reference numerals

First embodiment

12 divider

13 grain lifter

24 grain lifting mechanism

27 grain supporting box

31 Ring rotating chain (Ring rotator)

32 claw part

33 drive shaft

39 axle box

40 recess

D1 concave length

Q1-Q7 grain stalk guide-in path

T1 conveying path

T2 return path

Second embodiment

2 cutting part

13 grain lifter

26 headlamp device

27 head lamp cover

34 stalk supporting driving shaft

46 upper cover

46A upper side part

46B lower side part

47 upwardly facing concave portion

49 curved surface toward rear

50 transverse retraction part

51 projecting part

69 inclined plane

70 curved surface

Q1 grain stalk lifting path

Q2 return path

Third embodiment

2 cutting part

13 grain lifter

34 drive shaft

46 upper cover

52 position holding mechanism

53 first part

54 second part

55 reinforcing rib

56 locking part

Detailed Description

First embodiment

A mode for carrying out the present invention will be described based on the drawings. In the following description, unless otherwise specified, the direction of arrow F shown in fig. 1 to 3 is referred to as "front", the direction of arrow B is referred to as "rear", the direction of arrow L shown in fig. 2, 4, and 5 is referred to as "left", and the direction of arrow R is referred to as "right". The direction of arrow U shown in fig. 1, 3, 4, and 5 is referred to as "up", and the direction of arrow D is referred to as "down".

[ integral structure of combine harvester ]

As shown in fig. 1 and 2, the combine harvester of the present invention includes a traveling machine body 1 and 7 harvesting units 2 capable of harvesting standing straws. An engine E is mounted on the traveling machine body 1.

The traveling machine body 1 includes left and right crawler travel devices 4R and 4L as traveling devices, and a driver unit 5 on the right side of the front portion of the machine body. The driver seat 5a is provided in the driver unit 5. A threshing device 6 for threshing the grain stalks cut by the cutting unit 2 and a grain tank 7 for storing the grains obtained by the threshing process are provided behind the cab unit 5 in a state of being arranged in the lateral direction of the machine body.

The cab 8 covers the cab 5. Although not shown, the threshing device 6 performs a threshing process on the ear tip side in the threshing chamber while pinching and conveying the stem root of the harvested straw conveyed from the harvesting portion 2 by the threshing supply chain 9, and performs a screening process into grains and dust by a screening portion provided at a lower portion of the threshing chamber. The grains are stored in a grain box 7, and the dust is discharged to the outside of the machine. The threshing device is provided with a grain discharging device 10 which can discharge grains stored in a grain box 7 to the outside and a chopping device 11 which can chop straws after threshing and then discharge the straws to the outside.

The cutting unit 2 includes: a plurality of (8) grain dividers 12 arranged in parallel in the left-right direction and divided into 7 grain and straw introduction paths Q1 to Q7; 7 grain lifting devices 13 which are respectively arranged corresponding to all the grain stalk guide-in paths Q1-Q7 and lift up the planted grain stalks; a pusher-type harvesting device 14 for cutting the planted straw guided into all the straw guiding paths Q1-Q7; and a conveying device 15 for converging the harvested grain stalks in the harvesting width direction and conveying the converged grain stalks backward.

2 dividers 12 of the 8 dividers 12 positioned at the most transverse outer side of the machine body divide standing grain stalks into cutting objects and non-cutting objects, guide the cutting objects to a grain lifting path adjacent to the dividers 12, and guide the non-cutting objects to the transverse outer side of the grain lifting path. The other crop dividers 12 divide the crop stalks planted in the 2 planting rows to both lateral sides of the crop divider 12 and guide the crop stalks to the crop lifting paths on both lateral sides of the crop divider 12. The grain and straw introduction paths Q1 to Q7 have a width defined by the dividers 12 on the left and right sides, and are used for introducing 1 row of standing grain and straw.

That is, the combine harvester includes a plurality of dividers 12, and the plurality of dividers 12 are arranged in parallel in the left-right direction and form a plurality of straw introduction paths Q1 to Q7. The combine harvester further includes a plurality of grain lifting devices 13, and the grain lifting devices 13 are provided corresponding to the plurality of grain stalk introduction paths Q1 to Q7 and lift up the planted grain stalks.

As shown in fig. 1 and 3, the conveyor 15 includes a packer (japanese: パッカー)43A for grain pulling and a belt 43B with projections for grain pulling. The transport device 15 includes stem root transport devices 50 and 64 and ear tip transport devices 51 and 65. The stalk root conveying devices 50, 64 clamp and convey the stalk roots from which the grain stalks are cut. The ear tip conveying devices 51 and 65 are used for clamping and conveying the ear tips of the harvested rice straws. The conveyor 15 is driven by power from the engine E.

The conveyor device 15 includes a conveyor device 78 for threshing depth and a delivery and supply device 79. The threshing depth is fed by the feeding device 78 from the stalk root feeding devices 50, 64 toward the threshing chain 9. The delivery and supply device 79 delivers the harvested grain stalks from the threshing depth conveyor 78 and delivers the harvested grain stalks to the starting end of the threshing conveyor chain 9.

[ frame structure of harvesting part ]

Next, the frame structure of the cutting section 2 will be described. As shown in fig. 1, a cylindrical cutting support frame 1 is provided in the front-rear direction, and the cutting support frame 16 supports the entire cutting section 2 so as to be able to move up and down with respect to the travel machine body 1. The cutting support frame 16 is supported by a lateral pivot support portion 17 provided on the base end side of the rear upper portion.

A cylindrical lower-side lateral frame 19 extending in the right-left direction, i.e., the harvesting width direction, is connected to the front end of the harvesting support frame 16. As shown in fig. 1, at both ends in the machine width direction of the lower lateral frame 19, left and right longitudinally oriented seedling dividing frames 20 are connected so as to extend forward of the machine. A square-tube-shaped cutting blade support frame 21 extending in the transverse width direction of the machine body is connected to the seedling separating frames 20 extending across the left and right ends in a state where the front and rear intermediate portions are bridged. The cutting device 14 is supported by the cutting blade support frame 21.

As shown in fig. 2, a plurality of the seedling-dividing frames 20 are provided at intervals between the seedling-dividing frames 20 at both right and left ends. The middle part of the dividing frame 20 is connected at its rear end to the cutter supporting frame 21 and extends in a cantilever manner toward the front of the machine body. The dividing frames 20 have eight in total, and each divider 12 is provided at the front end of each dividing frame 20.

As shown in fig. 1, a cylindrical left vertical frame 25 extends upward from the left end of the lower lateral frame 19.

[ grain lifter ]

As shown in fig. 1 and 3, each grain lifting device 13 is provided in a standing posture in a backward inclined state in which the lower end side is located on the front side of the machine body and the closer to the upper end side, the more rearward the machine body. To explain, a line of sight LE of the driver seated in the driver seat 5a is shown in fig. 3. As shown in fig. 3, the harvesting portion 2 is configured such that the driver can view the front end of the crop divider 12 while seated in the driving seat 5 a.

The structure of each grain lifter 13 will be explained below.

As shown in fig. 4, the grain lifting device 13 has a grain lifting mechanism 24 and a grain lifting box 27. The grain lifter 24 has an endless rotating chain 31 (corresponding to the "endless rotating body" of the present invention) wound so as to straddle a driving sprocket 28 and a tension sprocket 29 on the upper side and a driven sprocket 30 on the lower side.

In addition, the grain lifting mechanism 24 has a plurality of claw portions 32. The plurality of claw portions 32 are attached to the endless rotating chain 31 at predetermined intervals along the longitudinal direction of the endless rotating chain 31.

Further, a drive shaft 33 extending in the left-right direction across the upper portions of the 7 grain lifter devices 13 is provided. The power from the engine E is transmitted to the drive shaft 33. The power from the drive shaft 33 is transmitted to the drive sprocket 28 via a relay transmission shaft 35 (see fig. 3) provided in the relay transmission case 34. The drive shaft 33 thus powers the grain lifter 13. The drive shaft 33 has a hexagonal cross-sectional shape and is configured to transmit power in a square fitting state.

That is, the combine harvester includes a drive shaft 33, and the drive shaft 33 extends in the left-right direction in a state of crossing the upper portions of the plurality of grain lifting devices 13, and supplies power to the grain lifting devices 13.

Here, the power transmission from the engine E to the drive shaft 33 will be described in detail. As shown in fig. 3, the combine harvester includes a transverse drive shaft 111, a harvesting drive shaft 112, and a transverse input shaft 113.

The horizontal transmission shaft 111 extends in the left-right direction and is housed inside the pivot support portion 17. The cutting drive shaft 112 extends in the front-rear direction in a state of being low in front and high in rear, and is housed inside the cutting support frame 16. The horizontal input shaft 113 extends in the left-right direction and is housed inside the lower horizontal frame 19.

The power of the engine E is transmitted to the transverse drive shaft 111. Further, power is transmitted from the transverse transmission shaft 111 to the transverse input shaft 113 via the take-off transmission shaft 112. Power is transmitted from the horizontal input shaft 113 to the drive shaft 33 via a vertical transmission shaft (not shown) housed in the left side and extending upward and downward toward the frame 25.

As shown in fig. 4, the grain lifter 13 sets either one of the vertical movement paths on both the left and right sides of the endless rotating chain 31 as the conveying path T1 and the opposite side as the return path T2. Although not shown, the conveying path T1 includes a guide plate for vertically guiding the claw portion 32 at a portion where the endless rotating chain 31 passes.

As shown in fig. 4, the grain-lifting devices 13 other than the fifth grain-lifting device 13 from the right among the plurality of grain-lifting devices 13 are arranged in a state where the right and left adjacent grain-lifting devices 13 are opposed to each other with the claw portions 32 thereof facing each other. The fifth grain lifter 13 is arranged from the right side in a state where the claw portion 32 protrudes leftward and stands up.

In the grain lifter 13, the claw portion 32 projecting in the lateral direction moves upward while carding the grain stalks in the conveying path T1, and when reaching the end of the conveying path T1, separates from the grain stalks and is stored in the grain lifter box 27, and descends in the return path T2 to return to the conveying path T1 side. Thus, each of the grain lifting devices 13 performs a grain lifting process on the standing grain stalks introduced into the grain lifting path by the claw portions 32 that move upward.

The grain-lifting box 27 extends in the up-down direction. The grain-supporting box 27 is configured to cover the return path T2 of the grain-supporting device 13 and the endless rotating chain 31 from the front side in a state where the conveying path T1 of the grain-supporting device 13 is exposed.

[ axle-box ]

As shown in fig. 4 and 5, the combine harvester includes axle boxes 39. The axle boxes 39 extend in the left-right direction between the upper parts of the 7 grain lifters 13, covering the drive shaft 33 from the front. The grain lifting box 27 extends downward from the lower end of the axle box 39.

That is, the combine harvester includes an axle box 39 covering the drive shaft 33 from the front. The grain-supporting device 13 includes a grain-supporting mechanism 24 and a grain-supporting box 27, the grain-supporting mechanism 24 includes an annular rotating chain 31 and a plurality of claws 32 attached to the annular rotating chain 31, and the grain-supporting box 27 extends downward from a lower end of the axle box 39 and covers the return path T2 and the annular rotating chain 31 of the grain-supporting device 13 from the front side in a state where the conveying path T1 of the grain-supporting device 13 is exposed.

The claw portion 32 is shown in the uppermost position P in fig. 5. The highest position P is the highest position within the moving range of the claw portion 32. As shown in fig. 5, when the claw portion 32 is located at the highest position P, the claw portion 32 is located near the axle box 39 in front view.

That is, when the claw portion 32 is located at the highest position within the moving range of the claw portion 32, the claw portion 32 is located near the axle box 39 in a front view.

As shown in fig. 4 and 5, a first recess 40a, a second recess 40b, a third recess 40c, and a fourth recess 40d are formed in the lower end portion of the axle case 39. The first concave portion 40a, the second concave portion 40b, the third concave portion 40c, and the fourth concave portion 40d are all concave portions 40 that are concave toward the upper side.

The first recessed portion 40a is formed in the axle box 39 at a portion corresponding to the first conveying path T1 and the second conveying path T1 from the right side.

The second recesses 40b are formed in the axle boxes 39 at portions corresponding to the third conveyance path T1 and the fourth conveyance path T1 from the right side.

The third recessed portion 40c is formed in a portion of the axle box 39 corresponding to the fifth conveying path T1 from the right side.

The fourth recessed portion 40d is formed in the axle box 39 at a portion corresponding to the sixth conveying path T1 and the seventh conveying path T1 from the right side.

That is, a recessed portion 40 recessed upward is formed at the lower end of the portion of the axle box 39 corresponding to the conveyance path T1. Further, in the axle box 39, a plurality of concave portions 40 are formed in a state corresponding to the plurality of conveying paths T1.

Fig. 5 shows a first position H1 and a second position H2. The first position H1 is a position in the vertical direction of the lower end of the portion of the axle box 39 where the recess 40 is formed. The second position H2 is a position in the vertical direction of the lower end of the portion of the axle box 39 where the recess 40 is not formed.

The interval between the first position H1 and the second position H2 in the up-down direction is equal to the recessed length D1 of the recess 40 in the front view.

In addition, a third position H3 is shown in fig. 5. The third position H3 is a position of the lower end of the drive shaft 33 in the up-down direction. The third position H3 is a higher position than the first position H1.

Further, the interval between the second position H2 and the third position H3 in the vertical direction is a predetermined interval D2. The predetermined distance D2 is equal to the distance between the lower end of the portion of the axle box 39 where the recess 40 is not formed and the drive shaft 33 in the front view. As shown in fig. 5, the recessed length D1 is shorter than the prescribed interval D2.

That is, the recessed length D1 of the recessed portion 40 is shorter than the interval between the lower end of the portion of the axle box 39 where the recessed portion 40 is not formed and the drive shaft 33 in the front view.

Additionally, length D3 is shown in FIG. 5. The length D3 is half the distance between the lower end of the portion of the axle box 39 where the recess 40 is not formed and the drive shaft 33 in the front view. Also, recessed length D1 is longer than length D3.

That is, the recessed length D1 of the recess 40 is longer than half of the interval between the lower end of the portion of the axle box 39 where the recess 40 is not formed and the drive shaft 33 in front view.

In addition, fig. 5 shows the first width W1 and the second width W2. The first width W1 is the left-right width of the third recessed portion 40 c. The second width W2 is the interval between 2 grain-lifting boxes 27 adjacent to each other via the conveying path T1 corresponding to the third recessed portion 40 c.

The first width W1 is equal to the second width W2. That is, the right and left width of the recess 40 is equal to the interval between the 2 grain-lifting boxes 27 adjacent to each other across the conveying path T1.

In the present invention, the term "identical" includes not only a strictly identical state but also a substantially identical state.

As shown in fig. 5, the recess 40 in the present embodiment has a shape that expands downward. The first width W1 is the lateral width of the central portion in the vertical direction in the third recessed portion 40 c. That is, the left-right width of the central portion in the vertical direction in the third recessed portion 40c substantially coincides with the second width W2. The left-right width of the upper end of the third recessed portion 40c is slightly smaller than the second width W2. The left-right width of the lower end portion of the third recessed portion 40c is slightly wider than the second width W2.

In this way, in the present embodiment, the right-left width of the central portion in the vertical direction in each concave portion 40 substantially coincides with the interval between the 2 grain-lifting boxes 27 adjacent to each other across the conveying path T1. The left-right width of the upper end of each recess 40 is slightly narrower than the interval between the 2 grain-lifting boxes 27 adjacent to each other via the conveying path T1. Further, the right-left width of the lower end portion of each concave portion 40 is slightly wider than the interval between 2 grain-lifting boxes 27 adjacent to each other across the conveying path T1.

In addition, a third width W3, a fourth width W4, and a fifth width W5 are shown in fig. 5. The third width W3 is the interval between the second recess 40b and the third recess 40 c. The second recess 40b and the third recess 40c are two recesses 40 adjacent to each other in the left-right direction.

The fourth width W4 is the left-right width of the grain-lifting box 27 in the fourth grain-lifting device 13 from the right among the 7 grain-lifting devices 13 shown in fig. 4. In addition, the fifth width W5 is the left-right width of the grain-lifting box 27 in the fifth grain-lifting device 13 from the right side among the 7 grain-lifting devices 13 shown in fig. 4. The 2 grain lifting boxes 27 are arranged between the second concave portion 40b and the third concave portion 40c in the left-right direction.

As shown in fig. 5, the total of the fourth width W4 and the fifth width W5 is equal to the third width W3.

In addition, a sixth width W6 and a seventh width W7 are shown in fig. 5. The sixth width W6 is the interval between the third recess 40c and the fourth recess 40 d. The third recess 40c and the fourth recess 40d are two recesses 40 adjacent to each other in the left-right direction.

The seventh width W7 is the left-right width of the grain-lifting box 27 in the sixth grain-lifting device 13 from the right side among the 7 grain-lifting devices 13 shown in fig. 4. The grain-lifting box 27 is disposed between the third recess 40c and the fourth recess 40d in the left-right direction.

As shown in fig. 5, the seventh width W7 is equal to the sixth width W6.

That is, the sum of the left-right widths of 1 or more grain-lifting boxes 27 provided between 2 recesses 40 adjacent to each other in the left-right direction is equal to the interval between 2 recesses 40.

According to the configuration described above, the recessed portion 40 recessed upward is formed in the lower end portion of the axle box 39 at the portion corresponding to the conveyance path T1. Thus, the upper portion of the planted straw lifted by the grain lifter 13 is less likely to interfere with the axle box 39. Therefore, the occurrence of poor transportation of the grain stalks due to interference between the upper portions of the planted grain stalks and the axle boxes 39 can be easily avoided.

In addition, with the above-described configuration, the recessed length D1 of the recess 40 is shorter than the distance between the lower end of the portion of the axle box 39 where the recess 40 is not formed and the drive shaft 33 in front view. Thus, the lower end of the portion of the axle case 39 where the recess 40 is formed is positioned below the drive shaft 33 in the front view. That is, the drive shaft 33 is hidden by the axle boxes 39 over the entire left and right lengths of the axle boxes 39 in the front view. As a result, the drive shaft 33 is reliably protected by the axle box 39.

That is, according to the above-described configuration, it is possible to realize a combine harvester that reliably protects the drive shaft 33 and is less likely to cause a conveyance failure of the grain stalks.

[ other embodiments ]

(1) Instead of the crawler travel devices 4R and 4L, a wheel type travel device may be provided, or a semi-crawler type travel device may be provided.

(2) The left-right width of the concave portion 40 may be larger than the interval between 2 grain-lifting boxes 27 adjacent to each other via the conveying path T1, or may be smaller than the interval between 2 grain-lifting boxes 27 adjacent to each other via the conveying path T1.

(3) The number of the recesses 40 formed in the axle boxes 39 may be any number other than four. For example, the number of the recesses 40 may be one.

(4) The sum of the left and right widths of 1 or more grain-lifting boxes 27 provided between 2 recesses 40 adjacent to each other in the left-right direction may be larger than the interval between the 2 recesses 40 or smaller than the interval between the 2 recesses 40.

Note that the structures disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be combined with the structures disclosed in other embodiments as long as no contradiction occurs. The embodiments disclosed in the present specification are merely exemplary, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within a range not departing from the object of the present invention.

Industrial applicability of the invention

The invention can be used for a combine harvester with a plurality of grain lifting devices for lifting up the planted grain stalks.

Second embodiment

Embodiments of the present invention will be described based on the drawings. In the following description, the direction of arrow "F" is referred to as "front side of the body," the direction of arrow "B" is referred to as "rear side of the body" (see fig. 6), the direction of arrow "L" is referred to as "left side of the body," and the direction of arrow "R" is referred to as "right side of the body" (see fig. 7).

[ integral Structure ]

As shown in fig. 6, the combine harvester of the present invention includes a traveling machine body 1 and a harvesting unit 2 capable of harvesting 7 planted stalks. The cutting unit 2 is connected to the travel machine body 1 so as to be swingable up and down about a lateral axis P1, and is provided so as to be drivable up and down by the up-and-down hydraulic cylinder 3.

The traveling machine body 1 includes right and left crawler traveling devices 4, and a driver unit 5 on the right side (right and left side) of the front portion of the machine body. A threshing device 6 for threshing the grain stalks cut by the cutting unit 2 and a grain tank 7 for storing the grains obtained by the threshing process are provided behind the cab unit 5 in a state of being arranged in the lateral direction of the machine body. The cab 8 covers the cab 5. Although not shown, the threshing device 6 performs a threshing process on the ear tip side in the threshing chamber while pinching and conveying the stem root of the harvested straw conveyed from the harvesting portion 2 by the threshing supply chain 9, and performs a screening process into grains and dust by a screening portion provided at a lower portion of the threshing chamber. The grains are stored in a grain box 7, and the dust is discharged out of the machine. The threshing device is provided with a grain discharging device 10 which can discharge grains stored in a grain box 7 to the outside and a chopping device 11 which can chop straws after threshing and then discharge the straws to the outside.

As shown in fig. 6 and 7, the harvesting section 2 includes a plurality of (8) grain dividers 12, a plurality of (7) grain lifting devices 13, pusher-type cutters 14, and a conveying device 1, the plurality of (8) grain dividers 12 are provided at intervals in the left-right direction and guide each row of planted grain stalks into the 7 grain stalk guide paths, the plurality of (7) grain lifting devices 13 are provided in a state of being arranged in the left-right direction corresponding to all the grain stalk guide paths, respectively, and lift up the planted grain stalks, the roots of the lifted planted grain stalks are cut by the cutters 14, and the conveying device 15 causes the harvested grain stalks to merge in the harvesting width direction and convey backward.

The cutting section 2 includes a cutting frame 20 that supports the entire cutting section 2. The cutting frame 20 includes: a main frame 22 extending forward of the machine body from the machine body frame 21 and having a rear end supported to be swingable up and down, a lateral frame 23 extending in the left-right direction at a front end of the main frame 22, and a raising transmission case 24 extending upward of the traveling machine body from one end of the lateral frame 23.

The hydraulic cylinder 3 is connected to the main frame 22 and the machine frame 21, and the cutting unit 2 is configured to be vertically swingably operated by the hydraulic cylinder 3 so as to be movable up and down to a working position for harvesting (a state shown by a solid line in fig. 6) and a retracted position (a state shown by a phantom line in fig. 6 and 7) which is a maximum upward position.

The harvesting section 2 includes left and right side covers 25 that cover lateral sides of both sides of the plurality of grain lifter devices 13 in the left and right direction. Left and right headlight devices 26 and left and right headlight covers 27 covering the headlight devices 26 are provided above the left and right side covers 25.

The headlight cover 27 is configured to cover the periphery of the headlight devices 26 provided at the upper portions of the left and right side portions of the cutting section 2 and the upper side portions of the lateral sides of the left and right sides of the plurality of grain lifter devices 13. The left and right side covers 25 are configured to cover lower side portions of lateral sides of both sides of the plurality of grain lifter devices 13 in the left-right direction.

[ grain lifter ]

The grain lifter 13 is provided in a backward-inclined standing posture in which the lower end side is located on the front side of the machine body and the lower end side is located on the rear side of the machine body. As shown in fig. 7, the grain lifter 13 is provided with an endless rotating chain 32 wound around and tensioned by a driving wheel 29 and a tension wheel 30 provided on an upper portion of the grain lifter box 28 and a guide wheel 31 provided on a lower portion of the housing. The plurality of raising claws 33 are supported by the endless rotating chain 32 so as to be able to undulate at predetermined intervals.

In the grain lifter 13, a path moving upward out of the moving paths on both the left and right sides of the endless rotating chain 32 is a grain lifting path Q1, and the opposite side is a return path Q2. The grain lifting path qQ1 includes a guide plate for vertically guiding the lifting claw 33 at a portion where the endless rotating chain 32 passes. In the grain-supporting path Q1, if the transversely projecting grain-supporting claws 33 move upward while carding the grain-supporting bars and reach the end of the grain-supporting path Q1, the grain-supporting device 13 is separated from the grain-supporting bars, is stored inside the grain-supporting box 28, descends in the return path, and returns to the grain-supporting path side.

There is a grain-lifting drive shaft 34, which extends in the left-right direction in a state of being located above the plurality of grain-lifting devices 13 and transmits power to the plurality of grain-lifting devices 13, respectively. In the power transmission structure, although not shown, power from the machine body side is transmitted to the grain lifting drive shaft 34 via a front-rear directional power transmission shaft provided inside the main frame 22, a lateral power transmission shaft provided inside the lateral frame 23, and a vertical power transmission shaft provided inside the lifting power transmission case 24.

A plurality of drive transmission units 35 are provided at intervals in the left-right direction, and the plurality of drive transmission units 35 transmit power to the plurality of grain lifting devices 13 by branching from the grain lifting drive shaft 34. As shown in fig. 9, the drive transmission unit 35 is configured to transmit power from the grain lifting drive shaft 34 to the drive wheel body 29 of the grain lifting device 13 by incorporating an upper bevel gear mechanism 37, a vertical drive shaft 38 extending in the longitudinal direction of the case, a lower bevel gear mechanism 39, and a front-rear direction drive shaft 40 in a vertically long drive case 36.

As shown in fig. 8, a support arm 41, which is curved in a mountain shape from a base-end boss portion of the cutting frame 20, extends forward to a position above the grain lifter 13. A support frame 42 extending in the left-right direction above the plurality of grain lifters 13 is attached to the front end of the support arm 41. The support frame 42 is formed by bending a plate material, and the front ends of the support arms 41 are connected thereto.

A plurality of support brackets 43 are bolted to the support frame 42 at intervals in the left-right direction, and the drive case 36 is fitted and supported on each support bracket 43 so as to be vertically swingable about the horizontal axis X1. A grain lifting drive shaft 34 is supported through the upper part of the drive box 36. The drive box 36 is supported so as to be swingable up and down about a shaft core X1 of the grain-lifting drive shaft 34.

The grain lifter 13 is connected to the drive box 36 in an integrally swingable state. The grain lifter 13 is configured to be vertically swingable about the axial center X of the grain lifting drive shaft 34, whereby the posture can be switched between a normal operation posture (shown by a solid line in fig. 9) in which the grain stalks are lifted and an open posture (shown by a phantom line in fig. 9) in which the rear side space is opened by swinging upward, as shown in fig. 8 and 9. An air damper 44 for holding the position in the open posture is provided.

As shown in fig. 9 and 10, the windup prevention cover 45 is provided at a position corresponding to the upper side of the grain lifting path Q1 in the region sandwiched by the drive transmission parts 35 separated in the left-right direction, in a state of covering the front side and the lower side of the grain lifting drive shaft 34. The anti-wind cover 45 is bolted to the support bracket 43 on both left and right sides.

[ Upper cover ]

As shown in fig. 7, 8 and 9, an upper cover 46 is provided to cover the front side of the grain lifting drive shaft 34. The upper cover 46 is provided in a state of extending left and right from the grain lifter 13 at the left end to the grain lifter 13 at the right end. The upper cover 46 is made of a resin material, and is supported by the grain lifter 13 so as to be vertically swingable about a horizontal axis X2 of the upper portion in a closed state in which the front side of the grain lifter drive shaft 34 is covered and an open state in which the front side of the grain lifter drive shaft 34 is opened.

An upward recessed portion 47 recessed upward is formed in the upper cover 46 at a position corresponding to a position above the grain lifting path Q1 of each of the plurality of grain lifting devices 13. Therefore, it is easy to avoid the situation that the upper part of the planted straw lifted by the grain lifter 13 interferes with the upper cover 46 to cause poor transportation of the straw.

The upper portion 46A of the upper cover 46 is provided at a position closer to the front side than the front surface 13a of the grain lifter 13, and the lower portion 46B of the upper cover 46 below the grain lifter drive shaft 34 is provided with an approach portion 48 that approaches the grain lifter 13. As shown in fig. 9 and 12, the approaching portion 48 is formed by a backward curved surface 49, and the backward curved surface 49 is curved backward to be retracted to the lower portion 46B of the upper cover 46 so as to approach the grain lifter 13.

The access portion 48 is provided at a portion corresponding to a portion above the return path Q2 of each of the plurality of grain lifters 13 in the lower portion 46B of the upper cover 46. A portion of the upper cover 46 corresponding to the upper portion of the return path Q2 is wide in the vertical direction and extends to a position lower than the upper end position of the grain lifter 13. An approach portion 48 is provided at a middle portion in the vertical direction of the wide extension portion.

The approaching portion 48 is located at an upper side than the upper end position of the grain lifter 13. That is, a backward curved surface 49 that is recessed so as to approach the grain lifter 13 is formed at a position above the upper end position of the grain lifter 13. Thus, even if the ear tip side of the planted straw lifted by the grain lifter 13 leans on a position corresponding to the upper part of the return path Q2, the occurrence of poor straw conveyance due to interference with the upper cover 46 can be easily avoided.

As shown in fig. 13, a lateral retreat portion 50 retreating outward in the lateral direction in a front view is provided in a portion adjacent to the lower portion 46B of the upper cover 46 in the laterally inner portion of the front lamp cover 27. Further, a laterally outer end portion of the lower portion 46B of the upper cover 46 is provided with a projecting portion 51 projecting laterally outward so as to enter the laterally retracted portion 50 of the headlamp cover 27. With this configuration, the gap between the headlight cover 27 and the upper cover 46 is reduced, so that the grain stalks do not enter, and the occurrence of poor conveyance of the grain stalks is easily avoided.

[ position holding mechanism ]

A position holding mechanism 52 for holding the position of the upper cover 46 in a closed state is provided. As shown in fig. 7, the position holding mechanism 52 is provided at positions corresponding to a plurality of portions of the upper cover 46 where the upwardly-facing concave portions 47 are formed, respectively, in a front view. The position holding mechanism 52 is configured such that a first member 53 provided on the upper cover 46 side and a second member 54 provided on the grain lifting drive shaft 34 side attract each other by magnetic force to hold the position of the upper cover 46. That is, the iron material and the magnet attract each other by magnetic force. The first member 53 is made of an iron material, and the second member 54 is made of a permanent magnet.

As shown in fig. 9 and 12, a reinforcing rib 55 extending in the left-right direction is provided on the rear surface of the upper cover 46. The reinforcing ribs 55 are formed integrally with the upper cover 46 at two upper and lower positions on the back surface of the upper cover 46. The reinforcing rib 55 is provided with a locking portion 56 for locking and holding the first member 53.

The locking portion 56 is provided with an extending portion extending downward from the upper reinforcing rib 55, and is configured to lock and hold the first member 53 in a sandwiched state in a recessed portion between the extending portion and the upper cover 46, and is configured to be provided with an extending portion extending upward from the lower reinforcing rib 55, and is configured to lock and hold the first member 53 in a sandwiched state in a recessed portion between the extending portion and the upper cover 46.

The first member 53 is formed by bending an iron plate into a shape that is easily inserted into the upper and lower locking portions 56. The upper and lower entering recesses 58 and 60 are configured to sandwich and hold the first member 53 by elastic deformation in a state where the first member 53 is entered.

The first member 53 is provided at positions corresponding to a plurality of portions of the upper cover 46 where the upwardly-facing recessed portions 47 are formed, that is, at positions corresponding to right and left intermediate portions of adjacent ones of the plurality of drive transmission portions 35, in front view. In addition, the first member 53 is provided at a position facing the grain lifting drive shaft 34 in a side view.

The second member 54 is made of a permanent magnet, and is provided at a position facing the first member 53, that is, at a position corresponding to a left-right intermediate portion of the adjacent drive transmission portion 35 among the plurality of drive transmission portions 35. The second member 54 is attached to the windup prevention cover 45 provided on the front side of the grain lifting drive shaft 34.

As shown in fig. 10 and 11, the coupling base portion 61 to which the second member 54 is fixedly attached is brought into contact with the back surface side of the wind-proof cover 45 and is coupled by a bolt. When the pedestal portion 61 is attached, the second member 54 is exposed forward through the insertion hole 62 formed in the windup prevention cover 45.

When the upper cover 46 is in the closed state, the first member 53 is positioned in a state of facing and approaching the second member 54, and the first member 53 and the second member 54 are attracted to each other by a magnetic force, whereby the upper cover 46 is held in the closed state.

The position holding mechanism 52 is configured to release the position holding by a force of lifting and swinging the upper cover 46. That is, the force attracted by the magnetic force is set to a force that can release the position holding by manually raising and swinging the upper cover 46.

The upper cover 46 is provided to cover the upper front portion of the grain lifter 13, and the position holding mechanism 52 is configured to release the position holding by abutting the front surface 13a of the grain lifter 13 against the force of the first member 53 and the second member 54 attracted by the magnetic force when the grain lifter 13 is switched from the normal operation posture to the open posture.

[ Direction indicators ]

Left and right direction indicators 62R, 62L are provided in a state of being positioned at the front of the body. A right direction indicator 62R, which is one of the right and left direction indicators 62R, 62L, is provided at a right portion, which is one side in the right and left direction, of the front portion of the cab 8. The other left direction indicator 62L is provided at a left side portion of the body front portion, which is the opposite side in the left-right direction, that is, a left side portion of the cutting portion 2. As shown in fig. 8, the left direction indicator 62L is supported by a support body 72 coupled to the harvesting frame 20.

The right direction indicator 62R is supported by a front pillar 64 of the cab 8. A rear view mirror 65 is provided on the lateral outer side of the cab 8, and the right direction indicator 62R is provided below the lower end of the rear view mirror 65 and at the same height as the upper end of the threshing device 6. The right direction indicator 62R is located at substantially the same position in the left-right direction as the right headlamp device 26.

An operation unit 67 is provided at a right side portion of a front portion inside the cab 8, and the operation unit 67 includes a switch 66 as an operation tool for switching the operation state of the direction indicators 62R and 62L. Right direction indicator 62R is provided at the same height as operation unit 67 and at a height corresponding to a lower end portion of a right end portion of front windshield 68 of cab 8 in front view.

The right end of the cutting portion 2 is located on the outer right side of the right end of the cab 8. Even with such a configuration, the right direction indicator 62R can be viewed from the front side when the cutting unit 2 is raised to the storage position.

The right direction indicator 62R is provided at a position higher than the cutting unit 2 at the retracted position so as to be visually observed from the front side of the machine body when the cutting unit 2 is raised to the retracted position. The right direction indicator 62R is provided at a position higher than the left direction indicator 62R even when the cutting unit 2 is raised to the retracted position.

[ other embodiments ]

(1) In the above embodiment, the approaching portion 48 is configured to have the backward curved surface 49 recessed so as to approach the grain lifter 13, but instead of this configuration, for example, as shown in fig. 14, an inclined surface 69 inclined so as to approach the grain lifter 13 from the upper portion 46A may be formed as the approaching portion 48 in the lower portion 46B, and as shown in fig. 15, a forward curved surface 70 may be formed as the approaching portion 48 so as to approach the grain lifter 13 while being curved so as to bulge forward from the upper portion 46A.

(2) In the above embodiment, the upward concave portion 47 is formed in the upper cover 46, but a structure in which such an upward concave portion 47 is not formed may be adopted.

(3) In the above embodiment, the upper cover 46 is in a state of being located at a level difference forward with respect to the front surface 13a of the grain lifter 13, but may be located at a level difference forward gradually as it goes upward instead of the level difference.

(4) In the above embodiment, the approaching portion 48 is configured to be located above the upper end position of the grain lifter 13, but the approaching portion 48 may be located below the upper end position of the grain lifter 13.

(5) In the above embodiment, the lateral retracted portion 50 is provided in the headlight cover 27 and the protruding portion 51 is provided in the upper cover 46, but instead of this configuration, both the left and right inner side portions of the headlight cover 27 and the outer side end portion of the upper cover 46 may be provided linearly in the vertical direction.

Industrial applicability of the invention

The invention can be applied to a semi-feeding combine harvester.

Third embodiment

Embodiments of the present invention will be described based on the drawings. In the following description, the direction of arrow "F" is referred to as "front side of the body," the direction of arrow "B" is referred to as "rear side of the body" (see fig. 16), the direction of arrow "L" is referred to as "left side of the body," and the direction of arrow "R" is referred to as "right side of the body" (see fig. 17).

[ integral Structure ]

As shown in fig. 16, the combine harvester of the present invention includes a traveling machine body 1 and a harvesting unit 2 capable of harvesting 7 planted stalks. The cutting unit 2 is connected to the travel machine body 1 so as to be swingable up and down about a lateral axis P1, and is provided so as to be drivable up and down by the up-and-down hydraulic cylinder 3.

The traveling machine body 1 includes right and left crawler traveling devices 4, and a driver unit 5 on the right side (right and left side) of the front portion of the machine body. A threshing device 6 for threshing the grain stalks cut by the cutting unit 2 and a grain tank 7 for storing the grains obtained by the threshing process are provided behind the cab unit 5 in a state of being arranged in the lateral direction of the machine body. The cab 8 covers the cab 5. Although not shown, the threshing device 6 performs a threshing process on the ear tip side in the threshing chamber while pinching and conveying the stem root of the harvested straw conveyed from the harvesting portion 2 by the threshing supply chain 9, and performs a screening process into grains and dust by a screening portion provided at a lower portion of the threshing chamber. The grains are stored in a grain box 7, and the dust is discharged out of the machine. The threshing device is provided with a grain discharging device 10 which can discharge grains stored in a grain box 7 to the outside and a chopping device 11 which can chop straws after threshing and then discharge the straws to the outside.

As shown in fig. 16 and 17, the harvesting section 2 includes a plurality of (8) grain dividers 12, a plurality of (7) grain lifting devices 13, pusher-type cutters 14, and a conveying device 1, the plurality of (8) grain dividers 12 are provided at intervals in the left-right direction and guide each row of planted grain stalks into the 7 grain stalk guide paths, the plurality of (7) grain lifting devices 13 are provided in a state of being arranged in the left-right direction corresponding to all the grain stalk guide paths, respectively, and lift up the planted grain stalks, the roots of the lifted planted grain stalks are cut by the cutters 14, and the conveying device 15 causes the harvested grain stalks to merge in the harvesting width direction and convey backward.

The cutting section 2 includes a cutting frame 20 that supports the entire cutting section 2. The cutting frame 20 includes: a main frame 22 extending forward of the machine body from the machine body frame 21 and having a rear end supported to be swingable up and down, a lateral frame 23 extending in the left-right direction at a front end of the main frame 22, and a raising transmission case 24 extending upward of the traveling machine body from one end of the lateral frame 23.

The hydraulic cylinder 3 is connected to the main frame 22 and the machine frame 4, and the cutting unit 2 is configured to be vertically swingably operated by the hydraulic cylinder 3 so as to be movable up and down to a working position for harvesting (a state shown by a solid line in fig. 16) and a retracted position (a state shown by a phantom line in fig. 16 and 17) which is a maximum upward position.

The harvesting section 2 includes left and right side covers 25 that cover lateral sides of both sides of the plurality of grain lifter devices 13 in the left and right direction. Left and right headlight devices 26 and left and right headlight covers 27 covering the headlight devices 26 are provided above the left and right side covers 25.

The headlight cover 27 is configured to cover the periphery of the headlight devices 26 provided at the upper portions of the left and right side portions of the cutting section 2 and the upper side portions of the lateral sides of the left and right sides of the plurality of grain lifter devices 13. The left and right side covers 25 are configured to cover lower side portions of lateral sides of both sides of the plurality of grain lifter devices 13 in the left-right direction.

[ grain lifter ]

The grain lifter 13 is provided in a backward-inclined standing posture in which the lower end side is located on the front side of the machine body and the lower end side is located on the rear side of the machine body. As shown in fig. 17, the grain lifter 13 is provided with an endless rotating chain 32 wound around and tensioned by a driving wheel 29 and a tension wheel 30 provided on an upper portion of the grain lifter box 28 and a guide wheel 31 provided on a lower portion of the housing. The plurality of raising claws 33 are supported by the endless rotating chain 32 so as to be able to undulate at predetermined intervals.

In the grain lifter 13, a path moving upward out of the moving paths on both the left and right sides of the endless rotating chain 32 is a grain lifting path Q1, and the opposite side is a return path Q2. The grain lifting path qQ1 includes a guide plate for vertically guiding the lifting claw 33 at a portion where the endless rotating chain 32 passes. In the grain-supporting path Q1, if the transversely projecting grain-supporting claws 33 move upward while carding the grain-supporting bars and reach the end of the grain-supporting path Q1, the grain-supporting device 13 is separated from the grain-supporting bars, is stored inside the grain-supporting box 28, descends in the return path, and returns to the grain-supporting path side.

There is a grain-lifting drive shaft 34, which extends in the left-right direction in a state of being located above the plurality of grain-lifting devices 13 and transmits power to the plurality of grain-lifting devices 13, respectively. In the power transmission structure, although not shown, power from the machine body side is transmitted to the grain lifting drive shaft 34 via a front-rear directional power transmission shaft provided inside the main frame 22, a lateral power transmission shaft provided inside the lateral frame 23, and a vertical power transmission shaft provided inside the lifting power transmission case 24.

A plurality of drive transmission units 35 are provided at intervals in the left-right direction, and the plurality of drive transmission units 35 transmit power to the plurality of grain lifting devices 13 by branching from the grain lifting drive shaft 34. As shown in fig. 19, the drive transmission unit 35 is configured to transmit power from the grain lifting drive shaft 34 to the drive wheel body 29 of the grain lifting device 13 by incorporating an upper bevel gear mechanism 37, a vertical drive shaft 38 extending in the longitudinal direction of the case, a lower bevel gear mechanism 39, and a front-rear direction drive shaft 40 in a vertically long drive case 36.

As shown in fig. 18, a support arm 41, which is curved in a mountain shape from a base-end boss portion of the cutting frame 20, extends forward to a position above the grain lifter 13. A support frame 42 extending in the left-right direction above the plurality of grain lifters 13 is attached to the front end of the support arm 41. The support frame 42 is formed by bending a plate material, and the front ends of the support arms 41 are connected thereto.

A plurality of support brackets 43 are bolted to the support frame 42 at intervals in the left-right direction, and the drive case 36 is fitted and supported on each support bracket 43 so as to be vertically swingable about the horizontal axis X1. A grain lifting drive shaft 34 is supported through the upper part of the drive box 36. The drive box 36 is supported so as to be swingable up and down about a shaft core X1 of the grain-lifting drive shaft 34.

The grain lifter 13 is connected to the drive box 36 in an integrally swingable state. The grain lifter 13 is configured to be vertically swingable about the axial center X of the grain lifting drive shaft 34, whereby the posture can be switched between a normal operation posture (shown by a solid line in fig. 19) in which the grain stalks are lifted and an open posture (shown by a phantom line in fig. 19) in which the rear side space is opened by swinging upward, as shown in fig. 18 and 19. An air damper 44 for holding the position in the open posture is provided.

As shown in fig. 19 and 20, the windup prevention cover 45 is provided at a position corresponding to the upper side of the grain lifting path Q1 in the region sandwiched by the drive transmission parts 35 separated in the left-right direction, in a state of covering the front side and the lower side of the grain lifting drive shaft 34. The anti-wind cover 45 is bolted to the support bracket 43 on both left and right sides.

[ Upper cover ]

As shown in fig. 17, 18, and 19, an upper cover 46 is provided to cover the front side of the grain lifting drive shaft 34. The upper cover 46 is provided in a state of extending left and right from the grain lifter 13 at the left end to the grain lifter 13 at the right end. The upper cover 46 is made of a resin material, and is supported by the grain lifter 13 so as to be vertically swingable about a horizontal axis X2 of the upper portion in a closed state in which the front side of the grain lifter drive shaft 34 is covered and an open state in which the front side of the grain lifter drive shaft 34 is opened.

An upward recessed portion 47 recessed upward is formed in the upper cover 46 at a position corresponding to a position above the grain lifting path Q1 of each of the plurality of grain lifting devices 13. Therefore, it is easy to avoid the situation that the upper part of the planted straw lifted by the grain lifter 13 interferes with the upper cover 46 to cause poor transportation of the straw.

The upper portion 46A of the upper cover 46 is provided at a position closer to the front side than the front surface 13a of the grain lifter 13, and the lower portion 46B of the upper cover 46 below the grain lifter drive shaft 34 is provided with an approach portion 48 that approaches the grain lifter 13. As shown in fig. 19 and 22, the approaching portion 48 is formed by a backward curved surface 49, and the backward curved surface 49 is curved backward to be retracted to the lower portion 46B of the upper cover 46 so as to approach the grain lifter 13.

The access portion 48 is provided at a portion corresponding to a portion above the return path Q2 of each of the plurality of grain lifters 13 in the lower portion 46B of the upper cover 46. A portion of the upper cover 46 corresponding to the upper portion of the return path Q2 is wide in the vertical direction and extends to a position lower than the upper end position of the grain lifter 13. An approach portion 48 is provided at a middle portion in the vertical direction of the wide extension portion.

The approaching portion 48 is located at an upper side than the upper end position of the grain lifter 13. That is, a backward curved surface 49 that is recessed so as to approach the grain lifter 13 is formed at a position above the upper end position of the grain lifter 13. Thus, even if the ear tip side of the planted straw lifted by the grain lifter 13 leans on a position corresponding to the upper part of the return path Q2, the occurrence of poor straw conveyance due to interference with the upper cover 46 can be easily avoided.

As shown in fig. 23, a lateral retreat portion 50 retreating outward in the lateral direction in a front view is provided in a portion adjacent to the lower portion 46B of the upper cover 46 in the laterally inner portion of the front lamp cover 27. Further, a laterally outer end portion of the lower portion 46B of the upper cover 46 is provided with a projecting portion 51 projecting laterally outward so as to enter the laterally retracted portion 50 of the headlamp cover 27. With this configuration, the gap between the headlight cover 27 and the upper cover 46 is reduced, so that the grain stalks do not enter, and the occurrence of poor conveyance of the grain stalks is easily avoided.

[ position holding mechanism ]

A position holding mechanism 52 for holding the position of the upper cover 46 in a closed state is provided. As shown in fig. 17, the position holding mechanism 52 is provided at positions corresponding to a plurality of portions of the upper cover 46 where the upwardly-facing concave portions 47 are formed, respectively, in a front view. The position holding mechanism 52 is configured such that a first member 53 provided on the upper cover 46 side and a second member 54 provided on the grain lifting drive shaft 34 side attract each other by magnetic force to hold the position of the upper cover 46. That is, the iron material and the magnet attract each other by magnetic force. The first member 53 is made of an iron material, and the second member 54 is made of a permanent magnet.

As shown in fig. 19 and 22, a reinforcing rib 55 extending in the left-right direction is provided on the rear surface of the upper cover 46. The reinforcing ribs 55 are formed integrally with the upper cover 46 at two upper and lower positions on the back surface of the upper cover 46. The reinforcing rib 55 is provided with a locking portion 56 for locking and holding the first member 53.

The locking portion 56 is provided with an extending portion extending downward from the upper reinforcing rib 55, and is configured to lock and hold the first member 53 in a sandwiched state in a recessed portion between the extending portion and the upper cover 46, and is configured to be provided with an extending portion extending upward from the lower reinforcing rib 55, and is configured to lock and hold the first member 53 in a sandwiched state in a recessed portion between the extending portion and the upper cover 46.

The first member 53 is formed by bending an iron plate into a shape that is easily inserted into the upper and lower locking members 56. The upper and lower entering recesses 58 and 60 are configured to sandwich and hold the first member 53 by elastic deformation in a state where the first member 53 is entered.

The first member 53 is provided at positions corresponding to a plurality of portions of the upper cover 46 where the upwardly-facing recessed portions 47 are formed, that is, at positions corresponding to right and left intermediate portions of adjacent ones of the plurality of drive transmission portions 35, in front view. In addition, the first member 53 is provided at a position facing the grain lifting drive shaft 34 in a side view.

The second member 54 is made of a permanent magnet, and is provided at a position facing the first member 53, that is, at a position corresponding to a left-right intermediate portion of the adjacent drive transmission portion 35 among the plurality of drive transmission portions 35. The second member 54 is attached to the windup prevention cover 45 provided on the front side of the grain lifting drive shaft 34.

As shown in fig. 20 and 21, the coupling base portion 61 to which the second member 54 is fixedly attached is brought into contact with the back surface side of the wind-proof cover 45 and is coupled by a bolt. When the pedestal portion 61 is attached, the second member 54 is exposed forward through the insertion hole 62 formed in the windup prevention cover 45.

When the upper cover 46 is in the closed state, the first member 53 is positioned in a state of facing and approaching the second member 54, and the first member 53 and the second member 54 are attracted to each other by a magnetic force, whereby the upper cover 46 is held in the closed state.

The position holding mechanism 52 is configured to release the position holding by a force of lifting and swinging the upper cover 46. That is, the force attracted by the magnetic force is set to a force that can release the position holding by manually raising and swinging the upper cover 46.

The upper cover 46 is provided to cover the upper front portion of the grain lifter 13, and the position holding mechanism 52 is configured to release the position holding by abutting the front surface 13a of the grain lifter 13 against the force of the first member 53 and the second member 54 attracted by the magnetic force when the grain lifter 13 is switched from the normal operation posture to the open posture.

[ Direction indicators ]

Left and right direction indicators 62R, 62L are provided in a state of being positioned at the front of the body. A right direction indicator 62R, which is one of the right and left direction indicators 62R, 62L, is provided at a right portion, which is one side in the right and left direction, of the front portion of the cab 8. The other left direction indicator 62L is provided at a left side portion of the body front portion, which is the opposite side in the left-right direction, that is, a left side portion of the cutting portion 2. As shown in fig. 18, the left direction indicator 62L is supported by a support body 72 coupled to the harvesting frame 20.

The right direction indicator 62R is supported by a front pillar 64 of the cab 8. A rear view mirror 65 is provided on the lateral outer side of the cab 8, and the right direction indicator 62R is provided below the lower end of the rear view mirror 65 and at the same height as the upper end of the threshing device 6.

An operation unit 67 is provided at a right side portion of a front portion inside the cab 8, and the operation unit 67 includes a switch 66 as an operation tool for switching the operation state of the direction indicators 62R and 62L. Right direction indicator 62R is provided at the same height as operation unit 67 and at a height corresponding to a lower end portion of a right end portion of front windshield 68 of cab 8 in front view.

The right end of the cutting portion 2 is located on the outer right side of the right end of the cab 8. Even with such a configuration, the right direction indicator 62R can be viewed from the front side when the cutting unit 2 is raised to the storage position.

The right direction indicator 62R is provided at a position higher than the cutting unit 2 at the retracted position so as to be visually observed from the front side of the machine body when the cutting unit 2 is raised to the retracted position. The right direction indicator 62R is provided at a position higher than the left direction indicator 62R even when the cutting unit 2 is raised to the retracted position.

[ other embodiments ]

(1) In the above embodiment, the first member 53 is made of an iron material and the second member 54 is made of a magnet, but instead of this configuration, a configuration may be adopted in which the first member 53 is made of a magnet and the second member 54 is made of an iron material, or a configuration may be adopted in which both the first member 53 and the second member 54 are made of a magnet.

(2) In the above embodiment, the first member 53 and the second member 54 are provided at positions corresponding to the right and left intermediate portions of the adjacent drive transmission portion 35, but the first member 53 and the second member 54 may be provided between the drive transmission portion 35 and the back surface of the upper cover 46.

(3) In the above embodiment, the locking portion 56 is provided in the reinforcing rib 55 provided on the back surface of the upper cover 46, but instead of this configuration, a dedicated bracket for supporting the first member 53 may be provided in the upper cover 46, and the locking portion may be provided in this bracket.

(4) In the above embodiment, the windup prevention cover 45 is provided so as to cover the front side and the lower side of the grain lifting drive shaft 34, and the second member 54 is provided on the windup prevention cover 45, but instead of this configuration, a configuration may be provided in which a cylindrical housing covering the entire circumference of the drive shaft 34 is provided, and the second member 54 is provided on the cylindrical housing.

(5) In the above embodiment, the position holding mechanism 52 is configured such that the first member 53 and the second member 54 are attracted to each other by magnetic force, but instead of this configuration, any configuration may be used as long as the position holding mechanism is configured such that the connection is released in accordance with the change in the posture of the grain lifter 13, and the position can be held by the engagement of the members, and various configurations may be used as the position holding mechanism 52.

(6) In the above embodiment, the upward concave portion 47 is formed in the upper cover 46, but a structure in which such an upward concave portion 47 is not formed may be adopted.

(7) In the above embodiment, the approaching portion 48 is configured to have the backward curved surface 49 recessed so as to approach the grain lifter 13, but instead of this configuration, for example, as shown in fig. 24, the lower portion 46B may have an inclined surface 69 inclined so as to approach the grain lifter 13 from the upper portion 46A as the approaching portion 48, and as shown in fig. 25, the approaching portion 48 may have a forward curved surface 70 curved so as to bulge forward from the upper portion 46A and approach the grain lifter 13.

Industrial applicability of the invention

The invention can be applied to a semi-feeding combine harvester.

Claims (23)

1. A combine harvester is characterized by comprising:

a plurality of grain dividers arranged in parallel in the left-right direction and forming a plurality of grain and straw introduction paths;

a plurality of grain lifting devices which are arranged corresponding to the plurality of grain stalk guiding paths and lift up the standing grain stalks;

a driving shaft extending in a left-right direction in a state of crossing upper portions of the plurality of grain lifting devices and providing power to the grain lifting devices; and

an axle housing covering the drive shaft from the front,

the grain lifting device comprises: a grain lifting mechanism having an annular rotating body and a plurality of claw portions mounted on the annular rotating body; a grain-supporting box extending downward from a lower end of the axle box and covering a return path of the grain-supporting device and the annular rotating body from the front side in a state where a conveying path of the grain-supporting device is exposed,

a concave portion that is concave upward is formed at a lower end portion of a portion of the magazine corresponding to the conveying path,

the recessed length of the recessed portion is smaller than the interval between the lower end of the portion of the shaft housing where the recessed portion is not formed and the drive shaft when viewed from the front.

2. A combine harvester according to claim 1,

the left and right width of the concave part is equal to the interval of two grain lifting boxes which are adjacent to each other by clamping the conveying path.

3. A combine harvester according to claim 1 or 2,

in the magazine, a plurality of the concave portions are formed in a state corresponding to a plurality of the transport paths,

the sum of the left and right widths of one or more grain-lifting boxes arranged between two recesses adjacent to each other in the left-right direction is equal to the interval between the two recesses.

4. A combine harvester according to any one of the claims 1-3,

when the claw portion is located at the highest position within the moving range of the claw portion, the claw portion is located in the vicinity of the axle box when viewed from the front.

5. A combine harvester according to any one of the claims 1-4,

the recessed length of the recessed portion is longer than half of the interval between the lower end of the portion of the shaft housing where the recessed portion is not formed and the drive shaft when viewed from the front.

6. A combine harvester is characterized in that,

the front part of the machine body is provided with a cutting part for harvesting and planting vertical grain stalks,

the cutting part is provided with: a plurality of grain lifting devices arranged along the left and right direction; a grain lifting drive shaft which extends in the left-right direction in a state of being positioned above the plurality of grain lifting devices and transmits power to the plurality of grain lifting devices respectively; and an upper cover covering the front side of the grain lifting drive shaft,

the upper cover is provided at an upper side portion thereof so as to be located on a front side of a front surface of the grain lifter in a side view, and at a lower side portion thereof below the grain lifting drive shaft, the upper cover is provided with an approach portion that approaches the grain lifter.

7. A combine harvester according to claim 6,

when viewed from the side, the upper cover is in a state of being different in height and close to the front side relative to the front surface of the grain lifter.

8. A combine harvester according to claim 6 or 7,

the approaching portion is formed with a backward curved surface that approaches the grain lifter while being curved in a shape bulging backward in a side view.

9. A combine harvester according to claim 6 or 7,

an inclined surface is formed at the approach portion, and the inclined surface is inclined in a manner of approaching to the grain lifter when viewed from the side.

10. A combine harvester according to claim 6 or 7,

the approaching portion is formed with a curved surface that is curved in a shape that bulges forward when viewed from the side and approaches the grain lifter.

11. A combine harvester according to any one of the claims 6 to 10,

an upward concave part which is concave upwards is formed at a part corresponding to the upper part of the grain-stalk lifting path of each grain-lifting device in the lower part side part,

the approaching portion is provided at a portion corresponding to an upper portion of a return path of each of the plurality of grain lifting devices among the lower portion side portions.

12. A combine harvester according to any one of the claims 6 to 11,

the approaching part is positioned at the upper side of the upper end position of the grain lifter.

13. A combine harvester according to any one of the claims 6 to 12,

the transverse sides at the two sides of the left and right directions of the grain lifting devices are provided with a head lamp and a head lamp cover for covering the head lamp,

a lateral retracting portion that retracts outward in the lateral direction in a front view is provided at a portion adjacent to the lower portion in a laterally inward portion of the headlamp cover,

the lower portion includes a laterally outer end portion that extends outward in the lateral direction so as to enter the laterally retracted portion in a front view.

14. A combine harvester is characterized in that,

the front part of the machine body is provided with a cutting part for harvesting and planting vertical grain stalks,

the cutting part is provided with: a plurality of grain lifting devices arranged along the left and right direction; a drive shaft extending in the left-right direction in a state of being located above the plurality of grain lifting devices and transmitting power to the plurality of grain lifting devices respectively; and an upper cover covering the front side of the driving shaft,

the grain lifter is supported to be capable of swinging up and down around the axis of the driving shaft, and is configured to be capable of switching between a normal action posture for carrying out grain stalk lifting and an opening posture for swinging up to open the rear side space,

the upper cover is supported by the grain lifter so as to be capable of swinging up and down around a horizontal axis of an upper part between a closed state covering the front side of the driving shaft and an open state opening the front side of the driving shaft,

a position holding mechanism for holding the position of the upper cover in the closed state,

the position holding mechanism is configured to come into contact with a front surface of the grain lifter to release position holding when the grain lifter is switched from the normal operation posture to the open posture.

15. A combine harvester according to claim 14,

the position holding mechanism holds the position of the upper cover by attracting the first member provided on the upper cover side and the second member provided on the drive shaft side to each other by a magnetic force.

16. A combine harvester according to claim 15,

the position holding mechanism is a structure in which an iron material and a magnet are attracted to each other by magnetic force.

17. A combine harvester according to claim 16,

the first component is made of iron materials, and the second component is made of magnets.

18. A combine harvester according to claim 17,

the upper cover has a locking portion on a back surface thereof for locking and holding the first member.

19. A combine harvester according to claim 18,

a reinforcing rib extending in the left-right direction is provided on the back surface of the upper cover,

the reinforcing rib is provided with the locking part.

20. A combine harvester according to any one of the claims 15-19,

a plurality of drive transmission parts which are provided at intervals in the left-right direction and which transmit power to the plurality of grain lifting devices from the drive shaft in a branched manner,

the first member is provided at a position corresponding to a right-left intermediate portion of the adjacent drive transmission portion.

21. A combine harvester according to any one of the claims 15-20,

the first member is provided at a position facing the drive shaft.

22. A combine harvester according to any one of the claims 15-21,

the second member is provided to a cover member that is positioned in front of the drive shaft and covers the drive shaft.

23. A combine harvester according to any one of the claims 15-22,

a plurality of drive transmission parts which are provided at intervals in the left-right direction and which transmit power to the plurality of grain lifting devices from the drive shaft in a branched manner,

the second member is provided at a position corresponding to a right-left intermediate portion of the adjacent drive transmission portion.

Images