JP7149997B2 - combine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a combine having a feeder that conveys harvested grain culms, and a threshing device that receives the harvested grain culms from the feeder and handles and processes the fed harvested grain culms.

In the combine harvester described above, conventionally, as shown in Patent Document 1, for example, a threshing drum provided in a threshing chamber in a threshing device so as to be rotatably driven, and a top plate of the threshing chamber having a rotating shaft center of the threshing drum. and a plurality of dust-sending valves that are supported in a row along the direction of the culling and feed and guide the grain culms toward the rear of the handling chamber. In this type of combine, a turning force is imparted by a threshing drum to the threshed material positioned in the threshing chamber, and a dust valve guides the threshed material to which the turning force has been imparted, thereby moving the threshed material into the threshing chamber. It is intended to facilitate the flow to the rear of the

JP 2015-62427 A

If a conventional technique is employed to provide a dust feed valve, the following problems may occur.
On the front side of the threshing machine, a large amount of threshing material is positioned due to the fact that the time that has passed since the threshing material was input is short and the time that has passed since the threshing material has been treated is short. tend to Further, when the distance between the threshing cylinder and the top plate is widened so that a large amount of culms can be thrown into the threshing device at once, a large amount of threshed material is positioned between the threshing cylinder and the top plate. The lower end of the dust valve positioned on the front side of the threshing device is positioned so that the lower end of the dust valve located on the front side of the threshing device is aligned with the rotational trajectory of the outer circumference of the threshing cylinder so that the dust valve can properly act on the threshed material even when a large amount of threshing material is positioned. When configured so as to be positioned close to each other, the lower end of the dust valve positioned on the rear side of the threshing device is also the rotation trajectory of the outer circumference of the threshing drum in the same way as the lower end of the dust valve positioned on the front side of the threshing device. located near As a result, the single grains positioned on the rear side of the threshing device are easily guided by the dust valve, and the grains are easily discharged to the outside of the threshing device.

The present invention guides the threshed material toward the rear of the threshing chamber by means of a dust valve, and suppresses the grain loss caused by discharging the grains out of the threshing device. To provide a combine harvester capable of smoothly flowing a threshing material to be threshed toward the rear of a threshing chamber regardless of the amount.

The combine according to the invention is
a feeder for conveying harvested grain culms;
a threshing device into which harvested grain culms from the feeder are fed and which handles and processes the fed harvested grain culms;
The threshing device includes a threshing drum which is rotatably provided in the threshing chamber, and the edge portion of the threshing drum in the radial direction on the side of the threshing drum approaches the top plate of the threshing chamber toward the starting end in the feeding direction. A plurality of feeders each having a tapered shape and supported by the top plate in a state of being aligned in a direction along the rotation axis of the threshing cylinder, for feeding and guiding the culms rearward in the threshing chamber. a dust valve and
The tapered portion of the dust valve positioned at the front of the handling chamber has a circumferential length greater than the tapered portion of the dust valve positioned at the rear of the handling chamber, and , the edge of the tapered portion of the dust feed valve located in the front portion is formed in a linear shape, and the edge of the tapered portion of the dust feed valve located in the rear portion is formed in a linear shape, It is formed in a curved shape that bulges toward the direction upper side.

According to this configuration, the distance between the lower end of the dust valve on the front side of the threshing device and the outer peripheral portion of the threshing cylinder is greater than the distance between the lower end of the dust valve on the rear side of the threshing device and the outer peripheral portion of the threshing drum. Since the space is narrowed, the dust valve properly guides the threshed material regardless of whether the amount of the threshed material located on the front side of the threshing device is large or small.
Since the distance between the lower end of the dust valve on the rear side of the threshing device and the outer peripheral portion of the threshing cylinder is wider than the distance between the lower end of the dust valve on the front side of the threshing device and the outer peripheral portion of the threshing drum, It is possible to suppress the grain located on the rear side of the device from being guided by the dust valve.

Therefore, while suppressing the discharge of the grains to the outside of the threshing device by being guided by the dust-sending valve, the threshing processing material located on the front side of the threshing device can be controlled regardless of whether it is large or small. It can be smoothly flowed toward the rear of the grain, and threshing can be performed efficiently.

The following configuration is provided to make the present invention more suitable.
A scraping portion having a spiral blade is provided at the front portion of the handling barrel and is adapted to sweep grain culms into the inside of the handling chamber by the rotation of the spiral blade, and the dust feeding valve is positioned above the scraping portion. The lower end of the threshing device is positioned closer to the locus of rotation of the outer circumference of the threshing drum than the lower end of the dust valve positioned on the rear side of the threshing device.

A large volume of threshing material is located in the raking section, and the dust valve can be properly positioned for the large volume of threshing material because the space between the dust valve above the raking section and the outer periphery of the threshing drum is narrow. It acts as a guide to allow the threshed material to flow smoothly into the inside of the threshing chamber.

The following configuration is provided to make the present invention more suitable.
A raking portion having a spiral blade and raking the culms into the inner side of the handling chamber by the rotation of the spiral blade is provided in the front part of the handling drum,
A scraping processing unit is provided behind the scraping unit in the scraping cylinder,
The lower end of the dust valve located above the front portion of the scraping portion follows the rotational trajectory of the outer peripheral portion of the scraping portion more than the lower end of the dust valve located above the rear portion of the scraping portion. It has a configuration that it is located in a close position.

Since the distance between the dust valve on the front upper part of the scouring part and the outer periphery of the scouring cylinder is narrower than the gap between the dust valve on the rear upper side of the scouring part and the outer periphery of the scouring cylinder, the front side of the scouring part Even if there is a large amount of threshed material located in the threshing chamber, it can be smoothly guided to the rear of the threshing chamber by being properly guided by the dust feed valve above the front part of the threshing section.

The following configuration is provided to make the present invention more suitable.
When viewed in the direction along the rotation axis of the dust handling cylinder, the height of the protrusion radially projecting from the top plate toward the handling cylinder at the center side portion in the width direction of the dust feeding valve is equal to the width of the dust feeding valve. It is provided with a configuration in which the height of the projecting radially from the top plate toward the threshing cylinder at both ends of the direction is higher than that of the projecting height.

According to this configuration, the distance between the outer peripheral portion of the handling cylinder and the top plate at the portion where the width direction central side portion of the dust valve is located is the outer peripheral portion of the handling cylinder at the portion where the width direction end side portions of the dust valve are located and the top plate, so that the width direction central side part of the dust valve and the width direction both end parts of the dust valve are positioned with respect to the threshed material flowing along the dust valve Different compressive force and conveying force can be applied to the portion where the threshing material is located, and the threshed material can be loosened easily.

The following configuration is provided to make the present invention more suitable.
A raking portion having a spiral blade and raking the culms into the inner side of the handling chamber by the rotation of the spiral blade is provided in the front part of the handling drum,
A scraping processing unit is provided behind the scraping unit in the scraping cylinder,
The dust feed valve located above the dust handling unit is formed in a tapered shape so that the lower edge of the dust feed valve approaches the top plate toward the starting end in the feeding direction,
The amount of taper of the dust valve located above the front portion of the scraping portion is greater than the amount of taper of the dust valve located above the rear portion of the scraping portion, and the amount of taper of the dust valve located above the rear portion of the scraping portion The circumferential length of the tapered portion of the dust valve located above the front portion is greater than the circumferential length of the tapered portion of the dust valve located above the rear portion of the handling portion. provided.

According to this configuration, the amount of tapering of the dust valve located above the front portion of the scraping portion is greater than the amount of tapering of the dust valve located above the rear portion of the scraping portion, and the amount of tapering of the dust valve located above the rear portion of the scraping portion Since the circumferential length of the tapered portion of the dust valve located above the front portion is greater than the circumferential length of the tapered portion of the dust valve located above the rear portion of the scraping portion, The tip of the dust valve located above the front part can be tapered so that the threshed material is less likely to get caught.
The lower end is located near the rotation locus of the outer periphery of the threshing cylinder, and a dust feed valve is installed at the tip to effectively send the threshed material located in the front part of the threshing unit toward the rear of the threshing chamber. The threshing material can be obtained in a state where it is difficult for the threshing material to be caught and the threshing part is not likely to stay or clog, and the threshing material located in the front part of the threshing part can be smoothly sent to the rear of the threshing chamber regardless of whether it is large or small. threshing can be performed efficiently.

It is a left view which shows the whole combine of an ordinary type|mold. It is a longitudinal left side view showing a threshing device. It is a top view which shows a threshing apparatus. It is a front view which shows the raking part of a handling cylinder. FIG. 4 is a rear view showing the treating portion of the treating cylinder; FIG. 4 is a plan view showing a partially broken barrel. FIG. 10 is a perspective view showing the guide member and liner member in a removed state; It is a front view which shows a guide member. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8; It is a top view which shows the terminal end side of a spiral blade. It is a rear view which shows the dust-sending valve located above the raking part. FIG. 4 is a rear view showing the dust valve located above the front of the handling section; FIG. 10 is a rear view showing the dust valve located above the rear of the handling section; FIG. 4 is a plan view showing a guide member having a first alternative structure; FIG. 11 is a plan view showing a guide member having a second alternative structure; FIG. 11 is a plan view showing a guide member having a third alternative structure; FIG. 11 is a plan view showing a guide member having a fourth alternative structure;

An embodiment of a combine according to the present invention will be described based on the drawings. A case of application to a common combine as an example of the combine will be described. FIG. 1 is a left side view showing the entire combine harvester of ordinary type. The direction of [F] shown in FIG. 1 is the front side of the self-propelled car, the direction of [R] is the rear side of the self-propelled car, the direction of the front side of the paper is the left side of the self-propelled car, and the direction of the back side is the right side of the self-propelled car. defined as

As shown in FIG. 1, the ordinary combine has a self-propelled vehicle in which a body frame 1 is constructed by connecting a plurality of steel materials such as square pipe materials. A boarding section 2 is formed in the right region of the front portion of the vehicle body frame 1 . The boarding operation part 2 is equipped with a shade 2a covering the boarding space. A pair of left and right crawler-type traveling devices 3 are provided on the lower portion of the vehicle body frame 1. - 特許庁At the left front end of the vehicle body frame 1, a reaping and conveying unit 4 for cutting and conveying the stalks of crops such as paddy rice, wheat, and rapeseed positioned in front of the vehicle body during work traveling is provided. They are connected so that they can move up and down with a fulcrum. The lifting and swinging of the reaping and conveying unit 4 is performed by the elongating and retracting operation of a hydraulic lifting cylinder 6 installed over the body frame 1 and the feeder 5 . The left half of the body frame 1 is provided with a threshing device 7 which receives the harvested stalks conveyed by the harvesting and conveying unit 4 as threshing objects, threshes them, and sorts the threshed products after threshing. be. A grain tank 8 is provided on the right rear portion of the body frame 1 to collect and store the single grains transported from the threshing device 7 by a lifting device (not shown). The grain tank 8 is equipped with a discharge auger 9 consisting of a screw conveyor for discharging the stored grain.

The reaping and conveying unit 4 will be described.
The reaping and conveying unit 4 separates the uncut stalks into the stalks to be harvested and the stalks not to be harvested by the dividers 11 arranged at the left and right ends of the front part of the stalks as the vehicle body travels. In addition, the culms to be harvested are raked rearward by a rotating reel 12 arranged in the upper front part of the harvesting and conveying unit 4, and the harvested object is to be harvested by a clipper-type reaping device 13 equipped at the bottom of the harvesting and conveying unit 4. The culms to be harvested are harvested by cutting the base side of the culms. Then, the harvested grain culms are collected at a predetermined position in the left-right direction by the lateral feeding auger 14 arranged behind the harvesting device 13 and sent out rearward, and the harvested grain culms are fed rearward by the feeder 5 installed over the threshing device 7 from the predetermined position. Throwing into the threshing device 7.

The threshing device 7 will be explained.
In the description of the threshing device 7 and the threshing cylinder 21, the processing starting end side of the threshing device 7 and the threshing drum 21 [grain stalk input side (lower side of the paper surface of FIG. 2)] is defined as "front", The processing end side [the culm discharge side (the upper side of the paper surface of FIG. 2)] is defined as "back".

FIG. 2 is a longitudinal left side view showing the threshing device 7. FIG. As shown in FIGS. 1 and 2, the threshing device 7 includes a threshing unit 7A for threshing the harvested grain culms fed by the feeder 5 as the threshed material, and a threshing unit 7A for sorting the threshed material into the threshed material. A sorting section 7B for processing and a recovery section 7C for recovering processed materials to be recovered after the sorting process are provided. In this threshing device 7, the threshing processing direction in the threshing unit 7A and the sorting processing direction in the sorting unit 7B are aligned with the longitudinal direction of the vehicle body, and the upper side in the threshing processing direction and the upper side in the sorting processing direction are positioned on the front side of the vehicle body. is set to

As shown in FIG. 2, the threshing section 7A is provided with a threshing chamber 20 formed in the upper portion of the threshing device 7. As shown in FIG. A threshing cylinder 21 is supported in the threshing chamber 20 so as to be rotated in the counterclockwise direction R (see FIG. 5) in a rear view, with the axis of the threshing cylinder facing forward and backward of the threshing apparatus as the rotation axis P2. A supply port 22 is formed in the lower front portion of the handling chamber 20 to allow the threshed material raked and conveyed by the feeder 5 to be introduced into the handling chamber 20 . A dust discharge port 23 is formed in the lower rear portion of the handling chamber 20 to enable discharge from the handling chamber 20 of the material to be discharged after the threshing process. A receiving net 24 having a U shape (see FIG. 4) as viewed in the front-rear direction is provided in a region below the handling cylinder 21 in the periphery of the handling cylinder 21 .

The handling chamber 20 is partitioned by a front support wall 25 and a rear support wall 26 for supporting the handling cylinder 21, a top plate 27 provided above the handling cylinder 21, a receiving net 24, and the like. As shown in FIGS. 2 and 4, the receiving net 24 is formed in an arc shape along the circumferential direction of the threshing cylinder 21 when viewed in the direction along the threshing cylinder axis. A plurality of vertical beams 24a arranged with a space therebetween and a plurality of vertical beams 24a formed in a linear shape in a direction along the axis of the threshing drum and arranged at predetermined intervals in the circumferential direction of the threshing drum while intersecting with the vertical beams 24a. and a horizontal beam 24b. The handling cylinder 21 has a scraping part 30 provided at the front part of the handling cylinder 21 and a handling part 40 provided at the rear part of the handling cylinder 21 .

Therefore, the threshing part 7A threw all the culms from the root to the tip of the harvested grain culms thrown into the threshing chamber 20 from the supply port 22 by the feeder 5 to the inner side of the threshing chamber 20 by the raking part 30 as the threshed material. threshing by the threshing processing unit 40 and the receiving net 24, the grains obtained by the threshing processing are leaked from the receiving net 24 to the sorting unit 7B, and the threshed culms and cut straws generated by the threshing processing are removed. It is discharged to the outside of the threshing device 7 from the dust outlet 23 .

The handling cylinder 21 will be described.
As shown in FIGS. 2, 4, 5 and 6, the threshing cylinder 21 is supported in the threshing chamber 20 so as to be rotationally driven with the axis of the threshing section 7A in the processing direction as the rotation axis P2. a supporting shaft 29; 29 and a handling section 40 driven to rotate.

The handling section 40 includes a handling cylinder main body 21A supported by a support shaft 29 and rotationally driven by the support shaft 29 . On the outer peripheral surface of the handling cylinder main body 21A as the outer peripheral surface of the handling cylinder 21, a plurality of handling teeth 41 are arranged in a state of being spaced apart in the direction along the axis of the handling cylinder 21 and spaced apart in the circumferential direction of the handling cylinder 21. are arranged side by side. Each handling tooth 41 protrudes radially outward from the outer peripheral surface of the handling cylinder main body 21A.

As shown in FIGS. 2, 5 and 6, the threshing cylinder body 21A is supported by the support shaft 29 in a state along the axis of the threshing cylinder and in a state of being arranged in a line spaced apart in the circumferential direction of the support shaft 29. It has six bar-shaped bristle tooth supporting members 42 . A plurality of bar-shaped tooth cusps 41 are supported on each cusp tooth supporting member 42 in a state of being spaced apart in the direction along the axis of the threshing cylinder. The tooth 41 of each tooth pliers supporting member 42 protrudes radially outward of the tooth servicing cylinder 21 from the tooth servicing member 42 . A disk-shaped front support member 43 is provided at the starting end of the support shaft 29 in the processing direction so as to rotate integrally therewith. A disk-shaped rear support member 44 is provided at the end of the support shaft 29 in the processing direction so as to rotate integrally therewith. Three disk-shaped plate-like members 45 arranged at intervals in the processing direction are provided at a portion between the front supporting member 43 and the rear supporting member 44 of the support shaft 29 so as to rotate integrally. The front end side of each bristle tooth support member 42 is supported on the outer peripheral portion of the front support member 43, the intermediate portion of each bristle tooth support member 42 is supported on the outer peripheral portion of each plate member 45, and each bristle tooth support member 42 is The rear end side is supported on the outer peripheral portion of the rear support member 44, and each tooth support member 42 is supported by the support shaft 29 so as to rotate integrally therewith. The cylindrical surface circumscribing the six tooth support members 42 is the outer peripheral surface of the body 21A. As shown in FIG. 5, each servicing tooth support member 42 is supported on the outer peripheral portion of the plate-like member 45 in a state where it is positioned radially inward of the plate-like member 45 relative to the outer peripheral edge 45a of the plate-like member 45. . Specifically, the tooth support member 42 is inserted into a recessed portion of the plate-like member 45 and connected to the plate-like member 45 via a plate-like connecting member 47 . The connecting member 47 and the tooth support member 42 are connected by welding. The connecting member 47 and the plate member 45 are connected by connecting bolts.

The arrangement pitch of the toothpicks 41 in each toothpick support member 42 in the direction of the axis of the toothpick cylinder is set to be the same. A pair of tooth support members 42 adjacent in the circumferential direction of the threshing cylinder are supported by a front support member 43, a plate-like member 45 and a rear support member 44 in a state in which the front and rear directions are reversed, The servicing teeth 41 of the other servicing tooth supporting member 42 are positioned in the gaps between the servicing teeth of one servicing tooth supporting member 42 of the other servicing tooth supporting member 42 . Each toothpaste support member 42 is detachable, and when the toothpaste 41 is worn out, the forward and backward direction of the toothpaste support member 42 can be changed.

In this embodiment, the bristle tooth supporting member 42 is made of a round steel pipe. Various bar-shaped members such as round steel, square bar steel, and square pipe steel can be used for the bristle tooth supporting member 42 in addition to the round pipe steel. An angle material or a channel material can also be used for the tooth support member 42 . In this embodiment, each treatment tooth 41 is made of a round steel material. Various bar-shaped members such as square bar steel, round pipe, and various pipes can be used for the handle 41 in addition to the round steel. In this embodiment, as the plate-like member 45, a plate-like member having a shape in which the space between the support shaft 29 and the tooth support member 42 is closed over the entire area is adopted. As the plate-like member 45 , a plate-like member having a plurality of through holes arranged in the circumferential direction of the plate-like member 45 between the support shaft 29 and the tooth support member 42 can be adopted.

The handling cylinder 21 is formed in a basket shape with an internal space S2 (see FIGS. 5 and 6) communicating with the handling chamber 20 through the tooth supporting members 42, and the outer circumference of the handling cylinder 21 is A plurality of bristle teeth 41 protruding radially outward from the surface of the bristle drum are arranged in a state of being spaced apart in the circumferential direction and the processing direction of the bristle drum 21, forming a so-called bar-shaped bristle drum. I have

Therefore, the threshing cylinder 21 rotates in the counterclockwise direction R when viewed from the rear with the axis of the threshing cylinder in the processing direction as the rotation axis P2, so that the threshing material from the raking unit 30 is transferred to the threshing processing unit 40 and the receiving net. 24. The threshing drum 21 applies a threshing process to the threshed material positioned in the threshing space S1 (see FIG. 2) between the receiving net 24 and the threshing process by striking with the threshing teeth support member 42 and the threshing teeth 41 or by combing the threshing teeth 41. to allow the processed material obtained by this threshing process to enter the internal space S2, and while stirring the processed material in the threshing processing space S1 and the processed material in the internal space S2, these processed materials are supported by the servicing teeth. A threshing process is performed by striking the member 42 and the toothpick 41 or combing the toothpick 41 .

The scraping portion 30 will be described.
As shown in Figs. A spiral blade 32 is provided on the outer peripheral portion of the base portion 31 in a standing state. Two spiral blades 32 are provided. The two helical blades 32 are arranged in a double helical shape spaced apart in the circumferential direction of the base portion 31 and are provided from the rear end portion to the front end portion of the base portion 31 . The two spiral blades 32 have a rising height A1 (see FIG. 6) from the base portion 31 on the terminal end side of the spiral blades 32 that is lower than a rising height A2 (see FIG. 6) on the starting end side of the spiral blades 32. It is set in a state of Regardless of the tapered shape of the base portion 31, the outer diameter of the entire spiral blade 32 from the terminal end side to the starting end side is constant or substantially constant. A plurality of support members 39 for supporting the spiral blade 32 on the side surface opposite to the conveying surface side of the spiral blade 32 are erected on the outer peripheral portion of the base portion 31 in a state of being aligned in the longitudinal direction of the spiral blade 32 at intervals. There is.

The base portion 31 is composed of a sheet metal member wound into a truncated cone shape. A rear end portion of the base portion 31 is connected to a front support member 43 . A rear end side of the base portion 31 is supported by a front support member 43 . A disc-shaped support member 33 is connected across the tip of the base portion 31 and the support shaft 29 . The tip side of the base portion 31 is supported by a support member 33 . The support member 33 has a larger diameter than the tip of the base portion 31 and a smaller diameter than the two spiral blades 32 .

The base portion 31 is driven by the support shaft 29 via the support member 33 and the front support member 43, and the two spiral blades 32 are rotationally driven around the rotation axis P2 of the handling drum 21 as the rotation axis. In the raking unit 30, the entire culm from the root to the tip of harvested grain culms thrown into the threshing chamber 20 from the supply port 22 by the feeder 5 is threshed, and the rotating spiral blade 32 guides the bottom plate 34 (Fig. 2), and is fed into the squeezing space S1 between the squeezing section 40 of the sling cylinder 21 and the receiving net 24.

In each spiral blade 32, as shown in FIGS. 4, 8 and 9, a guide member 37 is provided over the starting end side of the spiral blade 32 and the support member 33. As shown in FIGS. The guide member 37 has an outer peripheral edge 37a that connects the outer peripheral edge 32a at the starting end of the spiral blade 32 and the outer peripheral edge 33a of the support member 33 with the outer peripheral edge 37a. Specifically, the outer peripheral edge 32a of the spiral blade 32 is formed by the outer peripheral edge of a liner member 35, which will be described later. An outer peripheral edge 37 a of the guide member 37 smoothly continues to the outer peripheral edge 33 a of the support member 33 and the outer peripheral edge 32 a of the spiral blade 32 . The outer peripheral edge 33 a of the support member 33 and the outer peripheral edge 32 a of the spiral blade 32 are smoothly connected by the outer peripheral edge 32 a of the guide member 37 . A guide member 37 covers the step between the outer peripheral edge 32 a of the spiral blade 32 and the outer peripheral edge 33 a of the support member 33 , and the threshed material to be raked by the spiral blade 32 is guided by the guide member 37 to the outer peripheral edge of the support member 33 . It is guided from 33a to the outer peripheral edge 32a of the spiral blade 32. As shown in FIG. It is possible to prevent the threshed material from being caught on the front edge 32b (see FIG. 8) of the spiral blade 32 rising from the support member 33 to the outside of the support member 33.

As shown in FIGS. 6 to 9, the guide member 37 is configured by a member separate from the spiral blade 32 and the support member 33, and is supported by the support member 33 and the spiral blade 32. As shown in FIGS. When the guide member 37 is worn out or deformed, it can be removed from the support member 33 and spiral blade 32 and replaced with a new guide member.

Specifically, as shown in FIGS. 8 and 9, the starting end side of the guide member 37 is superimposed on the support member 33 in the front-rear direction, and the guide member 37 and the support member 33 are connected by a fastener 38 extending in the front-rear direction. It is Two fasteners 38 are provided. Each fastener 38 includes a connecting bolt 38a passing through the guide member 37 and the supporting member 33 forward from the rear of the supporting member 33, and a screw member 38b screwed into the connecting bolt 38a on the front side of the supporting member 33. ing. The screw member 38b is fixed to the front side of the support member 33 by welding.

As shown in FIGS. 8 and 9, the terminal end side of the guide member 37 is superimposed on the spiral blade 32 in the front-rear direction, and the guide member 37 and the spiral blade 32 are connected by fasteners 36 extending in the front-rear direction. Two fasteners 36 are provided. Each fastener 36 includes a connecting bolt 36a that penetrates the spiral blade 32 and the guide member 37 from the front of the spiral blade 32 toward the rear, and a screw member 36b that screws into the connecting bolt 36a on the rear side of the guide member 37. I have. As shown in FIG. 7, a screw member 36b for one connecting bolt 36a and a screw member 36b for the other connecting bolt 36a are integrally formed. As shown in FIGS. 4, 7 and 8, the screw member 36b extends from the portion where the screw hole acting on the connecting bolt 36a of the two connecting bolts 36a located on the inner peripheral side of the spiral blade 32 is located to the spiral blade. 32 is provided with an extension portion 36c extending toward the inner peripheral side. The screw member 36b presses the liner member 35 with a wide tightening area secured by the extension 36c. The fasteners 36 and 38 are not limited to the connecting bolts 36a and 38a and the screw members 36b and 38b, but headed connecting pins and detachable locking pins that can be attached to and removed from the headed connecting pins can be used.

As shown in FIG. 2 , a cover 46 is provided in front of the raking portion 30 and supported by the front support wall 25 . As shown in FIG. 6, the cover 46 is a disk-shaped plate member having an outer diameter larger than that of the support member 33, and covers the entire support member 33 from the front. As shown in FIG. 9 , a portion of the fastener 38 protruding forward from the support member 33 is covered with a cover 46 , and the cover 46 prevents the culm from being caught on the fastener 38 .

As shown in FIGS. 6, 7, 8, and 9, each spiral blade 32 has a spiral plate-like mounting member 32A erected on the outer peripheral portion of the base portion 31, and a conveying surface side of the mounting member 32A. A helical and plate-like liner member 35 is provided.

As shown in FIGS. 4 and 8 , the portion of the liner member 35 other than the starting end side overlapping the guide member 37 is connected to the mounting member 32A by a plurality of fasteners 48 arranged in the longitudinal direction of the liner member 35 . The fastener 48, like the fastener 36, includes a connecting bolt 48a and a screw member 48b. The same fastener 36 is used to connect the liner member 35 to the mounting member 32</b>A on the starting end side overlapping the guide member 37 and to connect the guide member 37 to the liner member 35 . On the starting end side of the spiral blade 32, the mounting member 32A, the liner member 35, and the guide member 37 are overlapped in this order in the front-rear direction and connected together by the same fastener 38. As shown in FIG. By operating the fastener 38 to the released state, the separation of the guide member 37 from the liner member 35 on the terminal end side and the removal of the liner member 35 from the mounting member 32A on the starting end side can be performed at once. As shown in FIGS. 4 and 6, among the plurality of fasteners 48 arranged in the longitudinal direction of the liner member 35, the fasteners 48A that are positioned one by one protrude from the spiral blades 32 to the outer peripheral side and scrape the threshed material. The screw member 48b is provided with a projecting portion 48c for feeding operation.

As shown in FIGS. 6 and 10, a notch 32c is provided on the outer periphery of the spiral blade 32 on the terminal end side. The notch 32c is provided across the mounting member 32A and the liner member 35. As shown in FIG. As shown in FIG. 10, the gap K between the terminal end of the spiral blade 32 and the lateral wall 28 of the threshing device 7 can be widened by the notch 32c, so that the threshed material can be easily moved to the threshing processing section 40.

As shown in FIGS. 2 and 3, on the inner surface side of the top plate 27 forming the threshing chamber 20, a plurality of dust valves are arranged in a direction along the rotation axis P2 of the threshing drum 21 (processing direction of the threshing section 7A). 50 is provided. Each dust valve 50 is made of a strip-shaped member and supported on the top plate 27 via a plurality of mounting screws 51 arranged at intervals in the longitudinal direction of the dust valve 50 . Each dust feed valve 50 guides the threshed material toward the rear of the threshing chamber 20 by contact with the threshed material to which the turning force is applied by the threshing cylinder 21 . Therefore, the dust valve 50 facilitates discharge of the threshed material from the dust outlet 23 .

FIG. 11 shows the dust valve positioned closest to the front side of the threshing device among the plurality of dust valves 50A and 50B positioned on the front side of the threshing device 7 among the plurality of dust valves 50. FIG. 10 is a rear view showing the dust valve 50A positioned above the inlet portion 30; FIG. 12 shows one dust valve 50B among the plurality of dust valves 50A and 50B positioned above the front part of the threshing unit 40 among the dust valves 50A and 50B positioned on the front side of the threshing device 7. It is a rear view showing the. 13 shows a plurality of dust valves 50C located on the rear side of the threshing device 7 among the plurality of dust valves 50, and the plurality of dust valves 50C located above the rear part of the handling unit 40. It is a rear view which shows one dust-sending valve 50C.

As shown in FIGS. 2, 11, 12, and 13, a lower end 50At of the dust valve 50A positioned above the raking portion 30 and a lower end 50Bt of the dust valve 50B positioned above the front portion of the scraping portion 40 are shown. However, the threshing device 7 To allow dust valves 50A and 50B to properly act on the threshed material even if there is a large amount of threshed material positioned on the front side of (the raking part 30 and the front part of the squeezing part 40). , and the dust valve 50C located on the rear side of the threshing device 7 (rear side of the threshing processing unit 40) is configured to be less likely to act on the grains.

As shown in FIG. 11, the dust valve 50A located above the raking portion 30 is configured such that the distance a between the lower end 50At and the rotation locus T is the same in the region from the front end to the rear end. there is As shown in FIG. 12, the dust valve 50B located above the front portion of the handling section 40 has a lower end 50Bt and a rotational locus T at a portion from the terminal end of the tip portion 50Bs to the rear end 50r of the dust valve 50B. are configured to have the same interval a. As shown in FIG. 13, the dust valve 50C located above the rear portion of the handling section 40 has a lower end 50Ct and a rotational trajectory T at a portion from the end of the tip portion 50Cs to the rear end 50Cr of the dust valve 50C. are configured to have the same interval b. The interval a between the dust valves 50A and the interval a between the dust valves 50B are of the same size. The interval b of the dust valve 50C is larger than the interval a of the dust valve 50A and the interval a of the dust valve 50B.

As shown in FIG. 11, the dust valve 50A is positioned at the central portion of the dust valve 50A in the width direction (located at the center portion in the width direction of the chamber 20) when viewed in the direction along the rotation axis P2 of the handling drum 21. portion) protrudes from the top plate 27 toward the handling cylinder 21 in the radial direction of the handling cylinder 21 with a height of 50 Ah, and the rear end portion of the dust feed valve 50A protrudes from the top plate 27 toward the handling cylinder 21. It is configured to protrude in the radial direction of the handling cylinder 21 at a protruding height of 50Az. A protruding height 50Ah at the widthwise center side portion of the dust feeding valve 50A is higher than a protruding height 50Az at the rear end side portion of the dust feeding valve 50A.

As shown in FIG. 12, the dust feed valve 50B is arranged from the top plate 27 at the widthwise center side portion of the dust feed valve 50B toward the treat drum 21 when viewed in the direction along the rotational axis P2 of the treat drum 21. A radially protruding height 50Bh is higher than the radially protruding heights 50Bx and 50Bz of the dust valve 50B from the top plate 27 to the handling drum 21 at both ends.

Specifically, when viewed in the direction along the rotation axis P2 of the handling drum 21, the widthwise central portion of the dust valve 50B (the portion located at the lateral widthwise central portion of the handling chamber 20) extends from the top plate 27. Projecting toward the handling drum 21 in the radial direction of the handling drum 21 with a height of 50Bh, the tip side portion of the dust feeding valve 50B (the tip portion 50Bs or the portion near the center in the width direction with respect to the tip portion 50Bs) protrudes from the top plate 27 toward the handling cylinder 21 in the radial direction of the handling cylinder 21 with a height of 50Bx, and the rear end portion of the dust feed valve 50B protrudes from the top plate 27 toward the handling cylinder 21. It protrudes in the radial direction with a protrusion height of 50Bz. A protrusion height 50Bh of the width direction center side portion is higher than a protrusion height 50Bx of the tip side portion. A protrusion height 50Bh of the widthwise center side portion is higher than a protrusion height 50Bz of the rear end side portion. A protrusion height 50Bx of the tip side portion is higher than a protrusion height 50Bz of the rear end side portion.

As shown in FIG. 13, the dust feed valve 50C is arranged from the top plate 27 of the dust feed valve 50C on the center side in the width direction toward the feed drum 21 when viewed in the direction along the rotational axis P2 of the feed drum 21. The height 50Ch projecting in the radial direction is higher than the heights 50Cx and 50Cz projecting radially from the top plate 27 toward the handling cylinder 21 at both ends of the dust valve 50C. there is

Specifically, when viewed in the direction along the rotation axis P2 of the handling drum 21, the widthwise center side portion of the dust feeding valve 50C (the portion located at the widthwise center of the handling chamber 20) is positioned from the top plate 27. Projecting toward the handling cylinder 21 in the radial direction of the handling cylinder 21 with a projection height of 50Ch, the tip side portion of the dust feeding valve 50C (the tip portion 50Cs and the portion near the center in the width direction with respect to the tip portion 50Cs) protrudes from the top plate 27 toward the handling cylinder 21 in the radial direction of the handling cylinder 21 with a height of 50Cx, and the rear end portion of the dust feed valve 50C protrudes from the top plate 27 toward the handling cylinder 21. It protrudes in the radial direction with a protrusion height of 50Cz. A protrusion height 50Ch of the width direction center side portion is higher than a protrusion height 50Cx of the tip side portion. A protrusion height 50Ch of the widthwise center side portion is higher than a protrusion height 50Cz of the rear end side portion. A protrusion height 50Cx of the tip side portion is higher than a protrusion height 50Cz of the rear end side portion.

As shown in FIGS. 12 and 13, the tip portions 50Bs and 50Cs of the dust valves 50B and 50C located above the scraping portion 40 have lower edges 50BL and 50CL that extend toward the top plate 27 toward the starting end in the feed direction of the material to be treated. It is formed in a tapered shape so as to approach the Circumferential direction length of tip portion 50Bs relative to radial length H1 (length in the radial direction of the handling barrel) of notch K1 of tip portion 50Bs of dust feed valve 50B located above the front portion of dust handling portion 40 The ratio of L1 (the length in the peripheral direction of the drum) is taken as the tapering amount BS of the dust feed valve 50B. The ratio of the circumferential length L2 of the tip portion 50Cs to the radial length H2 of the notch K2 of the tip portion 50Cs of the dust valve 50C located above the rear portion of the handling portion 40 is defined as the tapering of the dust valve 50C. Let the quantity be CS. The tapering amount BS of the dust valve 50B is set larger than the tapering amount CS of the dust valve 50C. The circumferential length L1 of the tip portion 50Bs of the dust valve 50B is set larger than the circumferential length L2 of the tip portion 50Cs of the dust valve 50C. The distance a between the lower end 50Bn of the dust feed valve 50B and the rotation locus T is narrower than the distance b between the lower end 50Cn of the dust feed valve 50C and the rotation locus T. It can be made into a tapered shape that is difficult to get caught.
In this embodiment, the lower edge 50CL of the tip portion 50Cs of the dust feed valve 50C is formed in a curved shape protruding toward the inside of the handling chamber. A lower edge 50CL of the tip 50Cs of the dust valve 50C can be formed linearly like the lower edge 50BL of the tip 50Bs of the dust valve 50B. The tip portions 50Bs and 50Cs correspond to the "tapered portion" of the present invention. The lower edges 50BL and 50CL correspond to the "edge" of the present invention.

The sorting section 7B will be described.
As shown in FIG. 2, the sorting section 7B is provided with a rocking sorting device 55 provided below the receiving net 24. As shown in FIG. The oscillating sorting device 55 is oscillated in the front-rear direction by the operation of an eccentric cam-type drive mechanism 56 provided at the rear end thereof. In addition, a winnow 57 is arranged in front and below the rocking sorting device 55 . The winnow 57 generates sorting air by means of an air blower that rotates counterclockwise when viewed from the left side. The oscillating sorting device 55 receives the processed materials from the receiving net 24 while oscillating, sieves and sorts the received processed materials as the processed materials to be sorted while transferring them in the sorting processing direction, and sorts them from the winnow 57. Wind sorting by wind.

The recovery unit 7C will be described.
In the recovery section 7C, a first recovery section 58 is formed below the swing sorting device 55 on the upper side in the sorting processing direction. Further, a No. 2 recovery section 59 is formed below the rocking sorting device 55 on the downstream side in the sorting processing direction. The first recovery part 58 is formed to have a narrowed bottom when viewed from the side, and guides the single grains flowing down from the upper side of the sorting processing direction of the rocking sorting device 55 to the bottom part as the first product. At the bottom of the No. 1 recovery section 58, No. 1 screw 58a for carrying out the No. 1 article is arranged in the left-right direction. The No. 1 screw 58a conveys the No. 1 article that has flowed down to the bottom of the No. 1 collection section 58 to a lifting device (not shown) that is connected to the right end of the No. 1 screw 58a. The second recovery part 59 is formed in a narrowed shape when viewed from the side, and guides grains with branch stems and the like that have flowed down from the downstream side of the sorting processing direction of the rocking sorting device 55 to the bottom part as the second product. At the bottom of the No. 2 recovery section 59, a No. 2 screw 59a for carrying out the No. 2 article is arranged in the left-right direction. The No. 2 screw 59a supplies the No. 2 product that has flowed down to the bottom of the No. 2 collecting section 59 to the No. 2 reducing device 60 that is connected to the right end of the No. 2 screw 59a. The second return device 60 lifts the second product from the second screw 59 a and returns it to the swing sorting device 55 .

[Another example]
(1) FIG. 14 is a plan view showing a guide member 37 having a first alternative structure. In the guide member 37 having the first alternative structure, the terminal end side of the guide member 37 is not connected to the liner member 35 of the spiral blade 32, but is connected only to the mounting member 32A of the spiral blade 32. It is supported by blades 32 .

(2) FIG. 15 is a plan view showing a guide member 37 having a second alternative structure. In the guide member 37 having the second alternative structure, the starting end side of the guide member 37 is not connected to the spiral blade 32 and is brought into contact with the spiral blade 32 . The guide member 37 is supported only by the support member 33 .

(3) FIG. 16 is a plan view showing a guide member 37 having a third alternative structure. A guide member 37 having a third alternative construction is supported by the spiral blade 32 in a state of being formed integrally with the mounting member 32A of the spiral blade 32 . The guide member 37 may be formed integrally with the liner member 35 of the spiral blade 32 .

(4) FIG. 17 is a plan view showing a guide member 37 having a fourth alternative structure. In the guide member 37 having the fourth alternative structure, the starting end side of the guide member 37 abuts against the support member 33 without being connected. The guide member 37 is not supported by the support member 33 but supported by the spiral blade 32 .

(5) In the above-described embodiment, the spiral blade 32 is provided with the liner member 35, but the spiral blade without the liner member 35 can be used as the spiral blade 32.

(6) In the above embodiment, the dust valve 50A is provided above the raking portion 30, but the dust valve 50A above the raking portion 30 may not be provided.

(7) In the above embodiment, the cover 46 is provided, but the cover 46 may not be provided.

(8) In the above-described embodiment, an example in which the rake portion 30 is provided with two spiral blades 32 is shown, but the number is not limited to two, and only one spiral blade 32 or three or more spiral blades 32 may be employed.

(9) In the above-described embodiment, an example in which the squeezing processing unit 40 is configured in a bar shape is shown, but a drum-shaped scouring processing unit 40 having shaving teeth provided on the outer peripheral surface of a cylindrical scouring body is adopted. You may

(10) In the above-described embodiment, the processing direction of the threshing device 7 is arranged along the longitudinal direction of the self-propelled vehicle. may be configured and implemented.

INDUSTRIAL APPLICABILITY The present invention is not limited to a combine having a crawler type traveling device, and can be used for a combine having traveling wheels instead of the crawler type traveling device or a traveling device combining a mini crawler and a traveling wheel. be.

5 feeder 7 threshing device 20 threshing chamber 21 threshing cylinder 27 top plate 30 raking part 32 spiral blade 40 threshing processing part 50A dust feed valve 50At lower end 50B dust feed valve 50Bh protrusion height 50Bs tip part 50Bt lower end 50Bx protrusion height 50Bz protrusion Height 50C Dust valve 50Ch Projection height 50Cs Tip 50Ct Lower end 50Cx Projection height 50Cz Projection height Bs Tapering amount Cs Tapering amount L1 Circumferential length L2 Circumferential length P2 Rotation axis T Rotation trajectory

Claims (1)

a feeder for conveying harvested grain culms;
a threshing device into which harvested grain culms from the feeder are fed and which handles and processes the fed harvested grain culms;
The threshing device includes a threshing drum which is rotatably provided in the threshing chamber, and the edge portion of the threshing drum in the radial direction on the side of the threshing drum approaches the top plate of the threshing chamber toward the starting end in the feed direction. A plurality of feeders each having a tapered shape and supported by the top plate in a state of being aligned in a direction along the rotation axis of the threshing cylinder, for feeding and guiding the culms rearward in the threshing chamber. a dust valve and
The tapered portion of the dust valve positioned at the front of the handling chamber has a circumferential length greater than the tapered portion of the dust valve positioned at the rear of the handling chamber, and , the edge of the tapered portion of the dust feed valve located in the front portion is formed in a linear shape, and the edge of the tapered portion of the dust feed valve located in the rear portion is formed in a linear shape, A combine that is formed in a curved shape that swells toward the upper side of the direction.

Images