JP7270441B2 - combine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester provided with a grain culm conveying device for conveying rearward all the culms of harvested grain culms harvested in a harvesting section.

The culm conveying device of the combine is composed of left and right drive sprockets (an example of a wheel on the downstream side) provided on a horizontal drive shaft (an example of a rotating shaft on the downstream side) located on the downstream side in the transportation direction, and Left and right endless rotating chains (corresponding to endless rotating bodies) are wound over the upper wheel provided on the laterally facing upper rotating shaft, and a plurality of conveying members are installed over the left and right endless rotating chains. Supported. In order to prevent the harvested culms from winding around the drive shaft, a winding prevention cover covering the drive shaft is provided between the left and right drive sprockets.

The anti-winding cover is made of synthetic resin, and includes a wide inner cover body extending over the left and right drive sprockets, and a narrow outer cover fitted on both sides of the inner cover body in the axial direction. It has a body and Each of the inner cover body and the outer cover body has a slit formed along the axial direction, and is provided so as to be mountable so as to surround the rotating shaft from the radially outer side. The slits and the gaps between the inner and outer cover members are covered with a coating material (see, for example, Patent Document 1).

JP 2015-139384 A

In the above-described conventional configuration, the winding prevention cover can be easily installed in a state where it covers the outer side of the drive shaft at the location sandwiched between the left and right drive sprockets (lower side wheels) without any trouble. In addition, the rigidity can be increased near the left and right drive sprockets so as to prevent deformation.

However, in the above-described conventional configuration, since the slit is formed, the rigidity of the anti-winding cover is low, and there is a risk that the cover will be deformed due to the pressing force of the harvested culms being conveyed. There is a great possibility that straw wastes will be caught between them and stay there, and there are disadvantages such as the waste wastes accumulating after short-term use, making it impossible to carry out a good transportation process.

Therefore, in the grain culm conveying device, it is possible to install it in a state where the outer side of the lower side rotating shaft is covered without trouble at the place sandwiched by the left and right lower side wheels, and it is good for a long time. It has been desired to be able to carry out an efficient transfer process.

The combine harvester according to the present invention is characterized by a reaping part provided in the front part of the machine body, and a rear part of the reaping part connected to the reaping part and carrying all the culms of the reaping grain culms reaped by the reaping part toward the rear. and a threshing device for threshing the harvested culms conveyed by the grain culm conveying device. is provided in the grain culm conveying device, a conveying case for conveying grain culms, a lateral lower side rotating shaft installed on the downstream side of the conveying case in the conveying direction, and the axial direction of the lower side rotating shaft Right and left lower-side wheels provided on the lower-side rotating shaft at intervals, a laterally-oriented upper-side rotating shaft provided on the upper side of the transporting direction in the transporting case, and a lateral upper-side rotating shaft provided on the upper-side rotating shaft The upper wheel, the left and right endless rotating bodies wound over the lower wheel and the upper wheel and provided with a gap in the left-right direction, and the left and right endless rotating bodies with a gap in the conveying direction. , a plurality of conveying members laterally installed over the left and right endless rotating bodies, and a cylindrical winding prevention cover externally inserted on the lower side rotating shaft between the left and right lower side wheels, A front wall portion of the threshing device is formed with a grain culm carrying-in port at a position corresponding to a lower portion of the threshing cylinder in a front view, the grain culm conveying device is connected to the grain culm carrying-in port, and the winding prevention cover is formed. is composed of two divided cover bodies divided along the axial direction of the lower side rotating shaft, and one of the two divided cover bodies is formed by the two divided cover bodies It is inserted into the end of the divided cover body on the other side of the cover body so as to have an overlapping portion. is positioned, and the one side divided cover body is positioned on the downstream side in the rotation direction of the handling cylinder, and on the left and right inner side surfaces of the left and right downstream side wheels, A circumferential groove having a shape substantially the same as that of the winding prevention cover and recessed over the entire circumference is formed. , which is fitted into the circumferential groove formed in the lower wheel located on one side in the left-right direction, and the other side in the left-right direction of the divided cover body on the other side is located on the other side in the left-right direction. It is provided in a state of being fitted into the circumferential groove formed in the lower-side wheel body, and the one-side end portion of the one-side split cover body and the other-side end portion of the other-side split cover body have the same outer diameter. and the other-side split cover body is formed so that the outer diameter of the one-side end overlapping with the one-side split cover body is larger than the outer diameter of the other-side end. The split cover body is formed of a cylindrical body having the same diameter from one lateral end to the other lateral end.

According to the present invention, the anti-winding cover is composed of two split cover bodies, and one split cover body is inserted into the other split cover body so as to have an overlapping portion at the end thereof.
The anti-winding cover having such a configuration can be made cylindrical to increase its rigidity.
Also, by changing the overlapping range of the two split cover bodies, the length to the left and right side ends can be changed. It can be positioned on the outer periphery of the lower side rotating shaft in a state separated from the side wheels, and when assembled, it can be installed in a state where it is close to the left and right lower side wheels by extending it so that the overlapping range is narrowed. It is possible.

Harvested grain culms conveyed by the grain culm conveying device are supplied to the threshing device through a grain culm carrying port formed in a front wall portion of the threshing device at a position corresponding to the lower portion of the threshing cylinder when viewed from the front. In a front view, when the grain culm loading port is visually observed, the handling drum is in a state of rotating from a portion on the left-right direction one side of the grain culm loading port to a portion on the left-right direction other side.

In the winding prevention cover, in a front view, the other large-diameter split cover body is positioned on the upper side in the rotation direction of the handling cylinder, and the one small-diameter split cover body is located on the lower side in the rotation direction of the handling cylinder. is located. As a result, the harvested culms conveyed with the rotation of the threshing cylinder are guided from the outer surface of the split cover body on the large diameter side toward the outer surface of the split cover body on the small diameter side. There is little risk of straw scraps entering the

Therefore, it is possible to attach the winding prevention cover in a state of covering the outer side of the downstream side rotating shaft without troublesomeness at the place sandwiched between the left and right downstream side wheels, while preventing straw waste. Due to clogging, etc., the possibility that the harvested grain culms are wound around the winding prevention cover and accumulated is reduced, and it is possible to carry out a good transportation process for a long period of time. Further, according to the present invention, both ends of the anti-winding cover in the axial direction are fitted into the circumferential grooves formed in the downstream side wheel, respectively, so that a labyrinth structure is formed, and the anti-winding cover and the downstream side wheel are formed. It is possible to prevent straw scraps and the like from being caught in the gap between the body and the body. Since the outer diameters of both sides of the anti-winding cover in the axial direction are the same, it is possible to share the same configuration as the left and right lower side wheels.

In the present invention, the overlapped portion is a portion deviated to the upper side in the rotation direction of the slaving cylinder at the grain culm carrying-in port from the lateral center position between the left and right lower side wheels in a front view. is preferably located at

Inside the threshing device, the harvested grain culms are rotated in a state of being held together by the rotating threshing drum, and the harvested grain culms are conveyed by the grain conveying device at the downstream side in the rotation direction of the threshing drum at the grain culm carrying-in port. Then, the harvested culms that are conveyed by the threshing drum in a state of being held together join together, so there are a larger amount of harvested culms than at the upper side in the rotation direction of the threshing drum. However, according to this configuration, since the overlapping portion is located at a position deviated to the upper side in the rotation direction of the threshing cylinder, compared with the case where it is located at the lower side in the rotation direction of the threshing cylinder, the overlapping portion conveys the material. There is little possibility that the transfer of harvested culms will be hindered, and good transfer processing can be easily performed.

In the present invention, fasteners are provided for radially penetrating and fixing the one-side divided cover body and the other-side divided cover body, and the fasteners are located on the left and right sides of the overlapped portion when viewed from the front. It is preferable to be positioned at a position shifted to the upper side in the rotation direction of the handling drum in the grain culm carrying-in port from the central position.

According to this configuration, the two split cover bodies are fixed by the fastener. Since the fastener is provided so as to pass through in the radial direction, it is possible to connect the two divided cover bodies more firmly than when the fastener is connected by a coating material or the like.

In addition, since the fastener is located in a portion of the grain culm carrying-in port that is shifted to the upper side in the rotational direction of the threshing cylinder from the left-right central position of the overlapped portion where it is assumed that there are few harvested culms, As compared with the case where it is located on the downstream side in the rotation direction of the threshing cylinder, there is less possibility that the harvested culms will come into contact and be caught and retained.

In the present invention, it is preferable that a plurality of fasteners are provided at intervals in the circumferential direction of the winding prevention cover.

According to this configuration, the two divided cover bodies are firmly connected by the fasteners at a plurality of locations spaced apart in the circumferential direction. For example, even if the load from the harvested culms is applied along the direction perpendicular to the axis, the two split cover bodies are connected by the fastener at only one point, and the load of the harvested culms will not There is little possibility of deformation, and it is possible to continuously carry out a favorable transport process.

In the present invention, the harvesting section has a cutting width wider than the lateral width of the grain culm conveying device, and the grain culm conveying device is positioned at the grain culm carry-in opening with respect to the reaping section in a front view. It is preferable that the reaper is connected to the reaper while being biased to the side corresponding to the upper side in the rotation direction of the threshing cylinder.

According to this configuration, the culm conveying device is biased toward the upper side in the rotation direction of the stalk drum at the culm loading port with respect to the reaper when viewed from the front. That is, the cutting width on the downstream side in the rotation direction of the threshing cylinder in the reaping portion is larger than the cutting width on the opposite side, that is, on the upper side in the rotation direction of the threshing cylinder. As a result, in the grain culm conveying device, a larger amount of harvested grain culms are present on the downstream side in the rotation direction of the threshing drum than on the side corresponding to the upper side in the rotation direction of the threshing drum.

Therefore, a large amount of harvested grain culms transported by the grain conveying device are present at a portion on the downstream side of the grain culm inlet in the rotation direction of the threshing cylinder, but at a portion on the upper side of the grain culm inlet in the rotation direction of the threshing drum, Since the amount of harvested grain culms is small, there is less possibility that the grain culms will get stuck in the gaps between the overlapped portions, and the culms will wind up around the winding prevention cover and accumulate. Become.

In the present invention, a constricted portion deformed so that the other side end portion has a small diameter is formed at a portion of the divided cover body on the other side that is shifted to the other side in the left-right direction from the center position in the left-right direction. preferred.

According to this configuration, the divided cover body on the other side has a diameter larger than that of the divided cover body on the one side at a portion to be fitted onto the divided cover body on the one side, but the narrowed portion is formed. As a result, the other side end portion has a smaller diameter, and has the same diameter as the one side split cover body.

Therefore, while the two divided cover bodies are inserted so as to have an overlapping portion, both ends in the axial direction of the winding prevention cover are formed to have the same diameter, and the left and right lower side wheels are the same. It becomes possible to share the configuration.

In the present invention, the downstream wheel body includes a base end portion positioned radially inward and externally fitted so as to be integrally rotatable with respect to the downstream rotating shaft; a wheel main body positioned on the outer side and provided with a winding portion around which the endless rotating body is wound, and wherein the base end portion is positioned closer to the shaft than the wheel main body; It is formed to be wider in the axial direction than the wheel main body in a state of having a protruding tubular portion protruding in the core direction, a flat portion is formed on the outer peripheral surface of the downstream side rotating shaft, and the protrusion at the base end portion is formed. A threaded hole along the radial direction is formed at a position of the cylindrical portion facing the flat portion, and a bolt mounted through the screw hole is brought into contact with the flat portion so as to rotate the lower side wheel in the axial direction. Position holding is preferred.

According to this configuration, a flat portion is formed on the outer peripheral surface of the downstream rotating shaft for transmitting rotational power to the downstream rotating shaft. The position of the downstream wheel is held by applying the bolt to be installed. As a result, there is no need for special drilling to retain the position, such as forming a recess for the bolt to enter in the radial direction, on the downstream rotating shaft, and the drilling does not reduce the strength of the shaft. Therefore, it is possible to easily avoid disadvantages such as early damage due to use.

In the present invention, the abutment member positioned at one end in the axial direction of the downstream rotating shaft and fixed in position in the axial direction, and the downstream wheel on one side of the left and right downstream wheels. and the abutment member, and provided between a first cylindrical member having a length corresponding to the distance between them, and the lower-hand side wheel on the one side and the lower-hand side wheel on the other side , a second cylindrical member having a length corresponding to the interval between them, and a fixing member capable of fixing the position of the lower wheel on the other side in the axial direction.

According to this configuration, the distance between the contact member and the lower wheel on one side is regulated by the first cylindrical member, and the distance between the lower wheel on one side and the lower wheel on the other side is the second. It is regulated by the tubular member, and the axial position of the lower wheel on the other side can be regulated by the fixing member. As a result, when the operator attaches the left and right lower-hand side wheels to the lower-side rotating shaft, the first cylindrical member, the one-side lower-side wheel, the second cylindrical member, In addition, positioning can be performed only by fitting and mounting the lower wheel on the other side in sequence.

It is the whole combine side view. It is the whole combine top view. It is a longitudinal side view of a feeder. It is a cross-sectional plan view of the feeder rear part. Figure 2 is a front view of the front part of the threshing device; FIG. 4 is a cross-sectional plan view of the rear part of the feeder during assembly; FIG. 4 is a partially cutaway plan view of the endless rotating chain; FIG. 4 is a side view showing an engagement state between a drive sprocket and an endless rotating chain; It is a top view of the right-hand end part in a reaping part. It is a cross-sectional plan view of the feeder rear part of another embodiment. It is a cross-sectional plan view of the left side part in the feeder rear part of another embodiment. It is a cross-sectional plan view of the right part in the feeder rear part of another embodiment. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 12; FIG.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the common type combine which concerns on this invention is described based on drawing.
〔overall structure〕
1 and 2 show a common combine harvester for harvesting crops such as rice, wheat, and soybeans. In this embodiment, when defining the longitudinal direction of the traveling machine body of the combine, it is defined along the traveling direction of the machine body in the working state. Define 1 and 2 is the front side of the fuselage, and the direction indicated by the code (B) in FIGS. 1 and 2 is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the fuselage, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the fuselage. Therefore, the lateral direction of the machine body corresponds to the lateral width direction of the traveling machine body.

A pair of left and right crawler traveling devices 2 are equipped on the lower part of the machine body frame 1 of the traveling machine body. A harvesting section 3 for harvesting crops to be harvested and conveying them rearward is provided on the front side of the traveling machine body. A threshing device 4 for threshing and processing harvested grain culms conveyed from the harvesting unit 3 and sorting the threshed product obtained by the threshing processing into grains and waste, and a threshing device on the body frame 1. With a grain tank 5 for storing the grains obtained in 4, a grain discharging device 6 for discharging the grains stored in the grain tank 5 to the outside of the machine, and a cabin for the operator to ride and operate. is provided with an operating unit 7 and the like. The combine harvester is configured as a whole stalk input type that cuts and reaps planted stalks at the base of the planted stalks and inputs all of the harvested stalks into the threshing device 4 .

The driving section 7 is located on the right side of the front part of the machine body, and the grain tank 5 is located behind the driving section 7 .
Furthermore, the threshing device 4 and the grain tank 5 are arranged side by side in the left-right direction, with the threshing device 4 positioned on the left side and the grain tank 5 positioned on the right side. An engine 8 for driving is provided below the operating section 7 . The threshing device 4 has a threshing cylinder 9 that is rotationally driven around an axis extending in the front-rear direction of the machine body. It is configured as an axial flow type. More specifically, as shown in FIG. 5, the handling cylinder 9 is rotationally driven clockwise (clockwise direction) when viewed from the front.
As shown in FIG. 5, power from the engine 8 is transmitted via a transmission belt 30 to a horizontal drive shaft 32 in a transmission case 31 positioned in front of the threshing drum 9, and the horizontal drive shaft 32 is transmitted to a bevel gear case 33. Power is transmitted to the handling cylinder 9 via an internal bevel gear mechanism (not shown).

The harvesting unit 3 includes a harvesting unit 10 provided at the front, and a grain culm conveying device connected to the rear of the harvesting unit 10 and conveying all the culms of harvested grain culms harvested by the harvesting unit 10 toward the rear. It has a feeder 11 as. The reaping unit 10 reaps planted grain culms to be harvested, and feeds the cut reaping grain culms laterally to the middle portion of the machine body width to merge. The feeder 11 rearwardly conveys the crops merged in the reaping unit 10 toward the threshing device 4 . The harvesting section 3 including the reaping section 10 and the feeder 11 can be moved between an elevated position and a lowered position around the horizontal axis P1 by the extension and contraction of the hydraulic cylinder 12 for elevating and extending across the body frame 1 and the feeder 11. It is supported so as to be vertically swingable between the .

The reaping part 10 is supported by a reaping frame 13 constructed by connecting square pipes, angle members having an L-shaped cross section, or the like, and is divided into a pair of left and right dividers 14 provided at the foremost end of the traveling machine body, and a rear part of the dividers 14 . It also has a raking reel 15 positioned above, a cutting blade 16 positioned behind the divider 14, and a lateral feeding auger 17 positioned between the cutting blade 16 and the feeder 11. - 特許庁
The divider 14 divides the planted culms to be harvested and the planted culms to be not harvested. The raking reel 15 rakes the planted grain culms to be harvested backward. The cutting blade 16 cuts the base side of the planted grain culm to be harvested that has been rake-backed by the raking reel 15, and is configured, for example, in the shape of a clipper. The lateral feeding auger 17 laterally feeds the reaping grain culms cut by the reaping blade 16 to the intermediate side in the left-right direction, collects them, and feeds them toward the rear feeder 11 .

As shown in FIG. 9, among the planted grain culms to be harvested divided by the divider 14, the planted grain positioned at the right end is located on the inner side of the right divider 14 in the cutting width direction. A conveying guide rod 34 is provided for guiding the base of the culm toward the inner side in the cutting width direction. With this configuration, the upper portion Q of the right end portion of the cutting blade 16 is opened, and the driver who is operating the operation section 7 can visually confirm the position of the cutting blade 16. be able to.

〔feeder〕
The feeder 11 will be explained.
As shown in FIG. 3, the feeder 11 is provided with a feeder case 18 as a carrying case formed in a rectangular tubular shape. A drive shaft 19 is provided at a location on the downstream side of the feeder case 18 as a horizontal downstream rotating shaft to which power from the engine 8 is transmitted via a relay shaft (not shown) to drive and rotate. As shown in FIGS. 4 and 5, a support cylinder 20 that rotatably supports a drive shaft 19 is mounted on the front wall of the threshing device 4 so as to be rotatable about a horizontal axis P1 via a pair of left and right fulcrum brackets 21. supported by Side walls 18A on both left and right sides of the feeder case 18 are integrally connected to the support cylinder portion 20, and the entire feeder 11 including the reaping portion 10 is supported on the front wall portion of the threshing device 4 so as to be vertically swingable about the horizontal axis P1. It is configured to be

The drive shaft 19 has a hexagonal cross section. A pair of left and right drive sprockets 22 as downstream wheels having hexagonal fitting holes that fit into the hexagonal cross-sectional shape are spaced apart along the axial direction and integrally rotatable with the drive shaft. 19 is externally fitted. Further, the drive shaft 19 protrudes outward on one lateral side of the feeder case 18, and power from the engine 8 is transmitted to the protrusion.

A driven shaft 24 serving as a horizontal upper-side rotating shaft is supported so as to be rotatable about a horizontal axis at a location on the front end side of the machine body in the feeder case 18 . A driven shaft 24 is provided with a drum-shaped driven wheel 25 as an upper side wheel so as to be rotatable integrally therewith. A pair of left and right endless rotary chains 26 are wound and stretched across the pair of left and right drive sprockets 22 and the driven wheels 25, respectively. A plurality of conveying members 27 are horizontally connected at a predetermined pitch over the pair of left and right endless rotating chains 26 . A pair of left and right flanges 28 are integrally provided on the outer peripheral portion of the driven wheel 25 to prevent the pair of left and right endless rotating chains 26 from slipping laterally.

Power is transmitted to the drive shaft 19 to integrally rotate the pair of endless rotating chains 26 in the same direction. The conveying member 27 picks up and conveys the grains between the lower moving path and the bottom surface portion 18B, and supplies the grains to the threshing device 4. As shown in FIG. 5, a culm loading port 35 is formed in the front part of the threshing device 4 at a position corresponding to the lower part of the threshing drum 9 in front view. The feeder 11 is connected to a grain culm carrying-in port 35 so as to receive the conveyed harvested culms.

As shown in FIG. 2, the reaping unit 10 has a wider reaping width than the width of the feeder 11, and is connected to the feeder 11 in a state of being biased to one side (right side) in the reaping width direction with respect to the feeder 11. It is As described above, the handling cylinder 9 is rotationally driven clockwise (clockwise direction) when viewed from the front. Therefore, the reaping part 10 is connected to the feeder 11 in a state of being biased to the side corresponding to the downstream side in the rotation direction of the handling drum 9 at the grain culm loading port 35 with respect to the feeder 11 when viewed from the front.

As shown in FIG. 5, the power from the engine 8 is transmitted to the drive shaft 19 through a relay shaft and an input pulley 37 (not shown). Also, the reversing power that has passed through the bevel gear mechanism (not shown) in the bevel gear case 33 can be transmitted to the drive shaft 19 for a short period of time via the reversing drive shaft 38 and the reversing clutch 39 . When the reversing power is transmitted, the feeder 11 performs reversing operation to rotate in the opposite direction. The reverse operation is used when, for example, jamming occurs during transportation.

As shown in FIGS. 7 and 8, the endless rotating chain 26 is basically connected by a plurality of connecting pins 40 and is formed of flat plate-shaped outer links 41 positioned on both sides in the width direction. , and flat plate-shaped inner links 42 located inside are alternately connected in a tandem state.
A bushing 43 and a roller 44 are fitted on the connecting pin 40 to form a pin portion 45 . The pin portion 45 engages with a concave portion 22A of the driving sprocket 22, which will be described later, so that the rotational driving force of the driving sprocket 22 is transmitted to the endless rotating chain 26, and the rotating operation is performed along the arrow direction in FIG. be done.

The endless rotating chain 26 is composed of the above-described outer links 41 and inner links 42 along most of its lengthwise route, but offset links 46 may be used in some areas along the way. (See FIG. 7). The offset link 46 is a link bent and deformed so that one end side is at the same position as the outer link 41 and the other end side is at the same position as the inner link 42. By using the offset link 46, endless rotation is possible. The length of the chain 26 can be adjusted. In other words, even if the offset link 46 is removed, the links on both sides can be connected as they are. Also, the length of the endless rotating chain 26 can be adjusted. The offset link 46 and the link adjacent to it use a bolt 47 (see FIG. 7) instead of the connecting pin 40 as a structure that enables disconnection, or a structure that prevents the inserted pin from coming off (see FIG. 7). not shown) can be employed.

The drive sprocket 22 will be explained.
As shown in FIG. 8, the driving sprocket 22 is provided with a plurality of teeth 22B (engagement protrusions) along the circumferential direction, and the pins of the endless rotating chain 26 are inserted into the recesses 22A between the adjacent teeth 22B. The portion 45 is configured to be engageable. The concave portion 22A has a bottom portion 22C that extends between the side portion of the tooth 22B positioned on one side in the circumferential direction and the side portion of the tooth 22B positioned on the other side among the adjacent teeth 22B. The bottom portion 22</b>C is formed in a flat shape along the circumferential direction, and the other side portion and the one side portion are formed in a curved shape along the outer shape of the pin portion 45 of the endless rotating chain 26 . .

The width of the bottom portion 22</b>C in the circumferential direction is formed to be larger than the outer diameter dimension of the pin portion 45 . Specifically, it has a width larger than twice the outer diameter dimension of the pin portion 45 . Therefore, the pin portion 45 of the endless rotary chain 26 engaged in the recess 22A can be positioned anywhere within the width of the bottom portion 22C in the circumferential direction within the recess 22A. As a result, even if the pin portion 45 of the endless rotating chain 26 is engaged with the recess portion 22A of the driving sprocket 22 while the harvested culms are still fitted in the recess portion 22A, the pin portion 45 is not moved along the circumferential direction. By moving, the harvested grain culms can be removed, and the problem of riding on the harvested grain culms and being disengaged from the endless rotating chain 26 can be avoided.

[Winding prevention cover]
As shown in FIG. 4, a cylindrical anti-winding cover 29 covers the pair of drive sprockets 22 on the laterally intermediate side of each of the pair of drive sprockets 22 on the drive shaft 19 so as to cover the outer peripheral side of the drive shaft 19 . are provided.

The winding prevention cover 29 is composed of two split cover bodies 29A and 29B split along the axial direction of the drive shaft 19, and one side of the two split cover bodies 29A and 29B is The end portion of the right divided cover body 29A is inserted and connected to the end portion of the left divided cover body 29B as the other side in an overlapping state.

Both of the two split cover bodies 29A and 29B are made of cylindrical metal plates, and as shown in FIG. is configured to The right portion of the left split cover body 29B is formed to have a diameter slightly larger than that of the right split cover body 29A so as to be fitted around the outer peripheral portion of the right split cover body 29A. The left divided cover body 29B has a diaphragm deformed so that the left end portion has a small diameter at a position closer to the left side (an example of the other side in the left-right direction) than the center position CL1 in the left-right direction of the left divided cover body 29B. A portion 50 is formed. The outer diameter dimension at the left end of the left split cover body 29B is formed to be the same as the outer diameter dimension of the right split cover body 29A.

The winding prevention cover 29 is supported in a state of being inserted and attached to each of the left and right drive sprockets 22 . That is, a circumferential groove 51 having substantially the same shape as that of the winding prevention cover 29 and recessed over the entire circumference is formed in each of the left and right drive sprockets 22 on the inner side surface in the left and right direction. The winding prevention cover 29 has a right end fitted in a circumferential groove 51 formed in the right drive sprocket 22 and a left end formed in the left drive sprocket 22 . It is provided in a state of being fitted into the circumferential groove 51 .

In the winding prevention cover 29, the left divided cover body 29B is positioned on the upper side in the rotation direction of the handling cylinder 9, and the right divided cover body 29A is positioned on the lower side in the rotation direction of the handling cylinder 9 when viewed from the front. provided in good condition. In addition, the overlapping portion 52 where the right divided cover body 29A and the left divided cover body 29B overlap is closer to the upper side in the rotation direction of the handling cylinder 9 than the left and right central position CL2 between the drive sprockets 22 on both the left and right sides. It is located in a place where

More specifically, as shown in FIG. 5, the handling cylinder 9 is rotationally driven clockwise (clockwise direction) when viewed from the front. A culm loading port 35 through which harvested culms transported by the feeder 11 are transported toward the threshing device 4 is formed in the front wall portion of the threshing device 4 at a position corresponding to the lower portion of the threshing drum 9. It is The lower portion of the handling drum 9 facing the grain culm inlet 35 rotates from left to right (in FIG. 5, from right to left in the drawing). Therefore, in this embodiment, the left side of the fuselage corresponds to the upper side of the handling cylinder 9 in the rotation direction, and the right side of the fuselage corresponds to the lower side of the handling cylinder 9 in the rotation direction. The overlapped portion 52 is positioned leftward from the left-right central position CL2 between the drive sprockets 22 on both the left and right sides, so it is positioned on the upper side in the rotation direction of the handling cylinder 9.例文帳に追加

As shown in FIG. 4, the right divided cover body 29A and the left divided cover body 29B are overlapped at a portion nearer to the upper side in the rotation direction of the handling cylinder 9 in the overlapping portion 52 where the right divided cover body 29A and the left divided cover body 29B overlap. 29A and the left divided cover body 29B are connected in the radial direction. More specifically, in the overlapping portion 52, fasteners 53 are provided for radially penetrating and fixing the right divided cover body 29A and the left divided cover body 29B. As shown in FIG. 4, the fastener 53 is located at a position deviated to the left (upper side in the rotation direction of the barrel 9 at the grain culm loading port 35) of the lateral center position of the overlapping portion 52 in front view. ing.

The fasteners 53 are composed of bolts 54 and nuts 55, and are provided in plurality (about three or four) at intervals in the circumferential direction of the winding prevention cover 29. As shown in FIG. The nut 55 is preliminarily welded and fixed to the inner surface of the right split cover body 29</b>A positioned inside the overlapping portion 52 . Bolt insertion holes penetrating radially through the right split cover body 29A and the left split cover body 29C are formed at locations where the nuts 55 are attached. As shown in FIG. 4 , the fastener 53 (bolt 54 and nut 55 ) is provided on the left side of the overlapping portion 52 , that is, on the upper side in the rotation direction of the handling cylinder 9 .

When the winding prevention cover 29 and the left and right drive sprockets 22 are assembled to the outer peripheral portion of the drive shaft 19, the following procedure can be used for assembly.

First, the drive shaft 19 is attached so as to pass through the left and right support cylinders 20 . At this time, the drive sprockets 22 on both the left and right sides and the winding prevention cover 29 are provided in a state of being positioned on the outer side of the drive shaft 19 between the support cylinder portions 20 on the left and right sides. At this time, the left and right divided cover bodies 29A and 29B are not connected and are slidable.

Either one of the left and right drive sprockets 22 is arranged close to the corresponding support tube portion 20 and fixed to the drive shaft 19 with a bolt 56 . At this time, as shown in FIG. 6, the left and right divided cover bodies 29A and 29B are deeply overlapped, and the outer side of one drive sprocket 22 is opened, and the drive sprocket 22 is fixed by the bolt 56. can be easily done. Next, the left and right split cover bodies 29A and 29B are moved toward the drive sprocket 22 whose position in the axial direction has been fixed after completion of assembly, and the outer side of the drive sprocket 22 on the opposite side is opened. It is fixed by bolts 56 .

A circumferential groove 57 into which the end portion of the support cylinder portion 20 can be inserted is formed in the outer side surface of the drive sprocket 22 in the left-right direction. By setting the end portion of the support cylinder portion 20 in a state in which it enters the circumferential groove 57 on the outer side, the labyrinth structure prevents straw scraps from entering the gap between the drive sprocket 22 and the drive shaft 19. there is

After the left and right drive sprockets 22 are fixed in this way, the left and right split cover bodies 29A and 29B are extended in the axial direction so that both side ends are formed on the left and right drive sprockets 22, respectively. It is installed so as to be fitted into the circumferential groove 51 provided. The left and right split cover bodies 29A and 29B are extended to a predetermined position, and bolts 54 are tightened from the outside while the bolt insertion holes formed in the right split cover body 29A and the left split cover body 29B are overlapped. It is mounted and tightened with the nut 55 to fix the left and right divided cover bodies 29A and 29B (see FIG. 4).

[Another embodiment]
(1) In the above-described embodiment, the overlapping portion 52 is located on the left side of the left-right center position CL2 between the left and right drive sprockets 22 (on the upper side in the rotation direction of the handling cylinder 9 at the grain culm loading port 35) in a front view. Although the overlapping portion 52 is positioned at a deviated position, it may be provided at an intermediate position in the left-right direction or a position deviated to the left of the left-right central position CL2.

(2) In the above-described embodiment, the fastener 53 is located at a position deviated to the left (upper side in the rotation direction of the barrel 9 at the grain culm loading port 35) of the lateral center position of the overlapping portion 52 in a front view. However, instead of this configuration, the fastener 53 may be provided in the vicinity of the left-right center position or in a position deviated to the right side of the left-right center position. Also, instead of the fastener 53, the two divided cover bodies 29A and 29B may be connected with an adhesive, and various connection structures can be used.

( 3 ) According to the configuration described in the above embodiment, when attaching the left and right drive sprockets 22 to the drive shaft 19, the operator determines the axial position at an arbitrary position and fixes it to the drive shaft 19 with the bolts 56. It will be. In this configuration, if the alignment is not properly performed, the drive sprocket 22 may come into contact with the support tube portion 20, or a gap may occur between the drive sprocket 22 and the support tube portion 20, and the gap may cause Straw chips and other dust can enter and adversely affect the rotation of the drive shaft 19 .

Therefore, in order to properly position the left and right drive sprockets 22 in the axial direction without cumbersome work, the following configuration may be adopted.

That is, the contact member S positioned at one axial end of the drive sprocket 22 and fixed in the axial direction, and the drive sprocket 22 on one side of the left and right drive sprockets 22 and the contact member S A first cylindrical member T1 provided therebetween and having a length corresponding to the interval therebetween, and a length corresponding to the interval provided between the drive sprocket 22 on one side and the drive sprocket 22 on the other side. and a fixing member K capable of fixing the position of the drive sprocket 22 on the other side in the axial direction.

A specific configuration will be described below.
As shown in FIG. 10 , the drive shaft 19 is rotatably supported by the left and right support cylinders 20 via bearings 70 at both end portions in the left-right direction (axial direction). As shown in FIGS. 11 and 12 , the left and right bearings 70 are restricted in position by retaining rings 71 on the outer side in the left and right direction, and the left and right bearings 70 restrict the position of the drive shaft 19 in the left and right direction.

Although not described in the above embodiment, each of the left and right drive sprockets 22 includes a base end portion 22D positioned radially inward and externally fitted to the drive shaft 19 so as to be rotatable therewith; A wheel main body portion 22E provided with teeth (engagement projections) 22B as a winding portion around which the endless rotating chain 26 is wound, positioned radially outward of the base end portion 22D. In addition, the base end portion 22D is wider in the axial direction than the wheel main body portion 22E in a state in which it has a protruding cylindrical portion 72 that protrudes in the axial direction more than the wheel main body portion 22E.

As shown in FIG. 13, a flat portion 19A is provided on the outer peripheral surface of the drive shaft 19 having a hexagonal cross section. A threaded hole 73 extending in the radial direction is formed at a position facing the flat portion 19A in the protruding cylindrical portion 72 of the base end portion 22D, and the bolt 56 is mounted through the threaded hole 73. As shown in FIG. The tip of the bolt 56 is formed to have a flat surface, and is configured to contact the flat portion 19A in a surface-to-surface contact state so as to regulate the position in the axial direction by friction.

11 and 12, left and right ring-shaped receiving members 74 are in contact with the inner races 70a of the left and right bearings 70 on the inner side in the left and right direction and fixed in the axial direction. , the left cylindrical member 75 provided between the left receiving member 74 and the left drive sprocket 22 and having a length corresponding to the distance between them, and between the left drive sprocket 22 and the right drive sprocket 22. provided between the intermediate cylindrical member 76 having a length corresponding to the interval between them, and the right drive sprocket 22 and the right receiving member 74 having a length corresponding to the interval between them A right tubular member 77 is provided. Each of the tubular members 75 , 76 , 77 has a cylindrical shape and is fitted on the outer end of the drive shaft 19 so as to be in contact therewith.

In such a configuration, for example, when the drive shaft 19 is attached to the left and right support cylinders 20 from the left outer side, the bearing 70 is attached to the right support cylinder 20 and the right receiving cylinder is mounted. The tool 74, the right tubular member 77, the right drive sprocket 22, the intermediate tubular member 76, the left drive sprocket 22, the left tubular member 75, the left receiving tool 74, and the left bearing 70, in that order, It is mounted so that the above members are in contact with each other. By abutting the members, the positions of the left and right drive sprockets 22 in the axial direction are naturally determined. Note that the winding prevention cover 29 is also attached.

In this case, the right receiving member 74 corresponds to the contact member S, the right tubular member 77 corresponds to the first tubular member T1, the intermediate tubular member 76 corresponds to the second tubular member T2, and the left tubular member 76 corresponds to the first tubular member T1. The cylindrical member 75 and the left receiving member 74 correspond to the fixing member K. As shown in FIG. When the drive shaft 19 is attached to the left and right support cylinders 20 from the right outer side, the left receiving member 74 corresponds to the contact member S, and the left cylinder member 75 corresponds to the first cylinder member. Corresponding to T1, the intermediate tubular member 76 corresponds to the second tubular member T2, and the right tubular member 77 and the right receiving member 74 correspond to the fixing member K.

( 4 ) In the embodiment described in ( 3 ) above, the left tubular member 75 and the left receiving member 74 correspond to the fixing member K, or the right tubular member 77 and the right receiving member 74 are fixed. Although the structure corresponds to the member K, the fixing member K is not limited to such a structure. A configuration in which the position is fixed by abutting against the inner race 70a of the bearing 70 may be used.

INDUSTRIAL APPLICABILITY The present invention can be applied to a combine provided with a grain culm conveying device that conveys all of the culms of harvested grain culms harvested in a harvesting section toward the rear.

4 threshing device 9 threshing cylinder 10 reaping unit 11 feeder (grain culm conveying device)
18 feeder case (conveyance case)
19 drive shaft (lower side rotating shaft)
19A flat portion 22 drive sprocket (lower wheel)
22B winding part (teeth)
22D base end portion 22E wheel main body 24 driven shaft (hand side rotating shaft)
25 driven sprocket (upper side wheel)
29 Winding prevention cover 29A Divided cover body on one side 29B Divided cover body on the other side 35 Grain culm loading port 50 Constricted portion 51 Circumferential groove 52 Overlapping portion 53 Fastener 56 Bolt 72 Protruding cylindrical portion 73 Screw hole CL1 Left-right central position CL2 Left-right direction center position K Fixed member S Contact member T1 First cylindrical member T2 Second cylindrical member

Claims (8)

a harvesting unit provided in the front part of the machine body; a grain culm conveying device connected to the rear part of the harvesting unit and conveying rearwardly all the harvested grain culms harvested by the harvesting unit; a threshing device for threshing the harvested grain culms conveyed by the conveying device,
The threshing device is provided with a threshing cylinder that is rotationally driven around an axis along the longitudinal direction of the machine body,
In the grain culm conveying device, a conveying case for conveying grain culms, a lateral lower side rotating shaft installed on the downstream side of the conveying direction in the conveying direction, and a space in the axial direction of the lower side rotating shaft Left and right lower-side wheels provided on the lower-side rotating shaft, a laterally-oriented upper-side rotating shaft installed on the upper side of the transporting direction of the transport case, and an upper-side wheel provided on the upper-side rotating shaft and left and right endless rotating bodies wound over the lower wheel and the upper wheel and provided at intervals in the left-right direction, and the left and right endless rotating bodies at intervals in the conveying direction. A plurality of conveying members that are laterally installed over the endless rotating body, and a cylindrical winding prevention cover that is externally inserted on the lower side rotating shaft between the left and right lower side wheels are provided,
A front wall of the threshing device is formed with a culm loading port at a position corresponding to the lower portion of the threshing drum in front view,
The grain culm conveying device is connected to the grain culm inlet,
The winding prevention cover is composed of two divided cover bodies divided along the axial direction of the downstream rotating shaft, and one of the two divided cover bodies is a divided cover body , is inserted into the end portion of the other divided cover body of the two divided cover bodies so as to have an overlapping portion,
In the winding prevention cover, in a front view, the other divided cover body is positioned on the upper side in the rotation direction of the handling cylinder, and the one side divided cover body is positioned on the lower side in the rotation direction of the handling cylinder. prepared in the state of
A circumferential groove having a shape substantially the same as the shape of the winding prevention cover and recessed over the entire circumference is formed on each of the left and right lower side wheels on the inner side surface in the left and right direction,
In the winding prevention cover, one left-right direction end portion of the one-side split cover body is fitted into the circumferential groove formed in the lower-side wheel body located on the one left-right direction side, and the other side end of the divided cover body on the other side in the left-right direction is provided in a state of being fitted into the circumferential groove formed in the lower wheel located on the other side in the left-right direction,
one side end portion of the one side divided cover body and the other side end portion of the other side divided cover body have the same outer diameter,
The other-side split cover body is formed so that the outer diameter of the one-side end part overlapping the one-side split cover body is larger than the outer diameter of the other-side end part, and the one-side split cover body , a combine having a cylindrical body with the same diameter from one end in the left-right direction to the other end in the left-right direction. The overlapped portion is located at a position that is shifted to the upper side in the rotation direction of the slapping drum at the grain culm carrying-in port from a laterally central position between the left and right lower side wheels when viewed from the front. A combine according to claim 1. a fastener that radially penetrates and fixes the one-side split cover body and the other-side split cover body,
3. The fastener according to claim 1 or 2, wherein the fastener is located at a position shifted to the upper side in the rotation direction of the handling cylinder in the grain culm carrying-in port from the lateral center position of the overlapping portion in a front view. combine. The combine according to claim 3, wherein a plurality of said fasteners are provided at intervals in the circumferential direction of said winding prevention cover. The reaping part has a reaping width wider than the lateral width of the grain culm conveying device,
The grain culm conveying device is connected to the reaping portion in a state of being biased from the reaping portion to a side corresponding to the upper side in the rotation direction of the threshing cylinder at the grain culm carrying-in port when viewed from the front. Item 5. The combine according to any one of Items 1 to 4. Claims 1 to 5, wherein a constricted portion deformed such that the diameter of the other side end portion is reduced is formed at a portion of the divided cover body on the other side that is deviated to the other side in the left-right direction from a center position in the left-right direction. The combine according to any one of the above. The lower wheel is
A base end positioned radially inward and fitted onto the downstream rotating shaft so as to be integrally rotatable with respect to the downstream rotating shaft; and a wheel main body provided with a winding part around which the rotating body is wound, and the base end has a protruding tubular part that protrudes in the axial direction from the wheel main body. formed wider in the axial direction than the wheel main body,
A flat portion is formed on the outer peripheral surface of the downstream side rotating shaft,
A threaded hole along the radial direction is formed at a position facing the flat portion of the protruding cylindrical portion of the base end portion,
The combine according to any one of claims 1 to 6, wherein a bolt mounted through said screw hole is brought into contact with said flat portion to hold the position of said downstream wheel in the axial direction. a contact member positioned at one axial end of the downstream rotating shaft and fixed in the axial direction;
a first cylindrical member provided between one of the left and right lower-side wheels and the abutment member and having a length corresponding to the interval therebetween;
a second cylindrical member provided between the lower wheel on one side and the lower wheel on the other side and having a length corresponding to the interval therebetween;
The combine according to any one of claims 1 to 7, further comprising a fixing member capable of fixing the position of the lower wheel on the other side in the axial direction.

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