JP7202986B2 - combine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester in which a grain tank for storing grains obtained by threshing is positioned above a threshing device.

In the combine harvester configured as described above, the threshing device has a configuration in which the outer peripheral portion of the threshing section that performs the threshing process is surrounded by a substantially box-shaped support frame with high rigidity. On both the left and right sides, substantially plate-shaped side walls extending over substantially the entire vertical and longitudinal directions are provided, and such a support frame is used to support the grain tank from below. (See Patent Document 1, for example).

JP 2019-76034 A

In the above-described conventional configuration, the heavy grain tank can be stably supported by the highly rigid support frame. It is

By the way, inside the threshing apparatus, a threshing cylinder that is driven to rotate, an arc-shaped receiving net provided along the outer peripheral portion of the threshing cylinder, and the like are provided for threshing the culms. Along with the work, maintenance work such as cleaning of the inside and inspection and repair are required. In order to perform such maintenance work, it was necessary to remove the side wall.

In the above-described conventional structure, the side walls of the threshing apparatus are constructed by adding a plurality of reinforcing members to a thick plate as a frame structure in order to increase the rigidity. It becomes a large member that extends across. As a result, the task of removing the side wall portion, which is a large-sized member, is burdensome and troublesome.

In order to eliminate such a disadvantage, the side wall of the threshing device is designed to have a lightweight and simple structure so that the attachment and detachment work can be easily performed. may be provided, and the grain tank may be directly supported by the plurality of vertically oriented frame bodies. However, in such an improved configuration, there is a disadvantage that maintenance work, such as removal of the receiving net inside the threshing device, is hindered by the vertically oriented frame, making it difficult to perform the work.

Therefore, in a combine harvester in which a grain tank is provided above a threshing device, it has been desired to support the grain tank well and to facilitate maintenance work inside the threshing device. .

The characteristic configuration of the combine according to the present invention includes a threshing device that is supported by the body frame and threshes the harvested culms, and a threshing device that is positioned above the threshing device. A grain tank for storing the obtained grains and a support frame for supporting the grain tank with respect to the machine frame are provided, and a front portion of the threshing device is provided on the laterally outer side of the threshing device. and a rear portion thereof and is openable and closable by a lid body, and the support frame includes a front support column located forward of the front end of the opening, and a support frame located rearward of the rear end of the opening. a first lateral connector that connects the upper end of the front support and the upper end of the rear support, and the first lateral connector and the upper end of the opening. a second horizontal connecting body that connects the front support column and the rear support support; and a vertical connecting body that connects the first horizontal connecting body and the second horizontal connecting body, and is viewed from the side of the fuselage. The point is that it is provided so as not to overlap with the opening.

According to the invention, the grain tank is supported by the machine frame via the support frame, and the side walls of the thresher do not have to bear the load of the grain tank. As a result, the side walls do not need to be large and heavy members, such as adding a plurality of reinforcing members to a thick and large-area plate. In the support frame, the front support column and the rear support column are connected by the first horizontal connection body and the second horizontal connection body, and the first horizontal connection body and the second horizontal connection body are connected to the vertical connection body. are connected by, and they are assembled integrally.

The first horizontal connecting body and the second horizontal connecting body are connected on both front and rear sides by the front support column and the rear support support, and are connected by the vertical connection body on the front and rear middle section. Rigidity can be increased compared to supporting the grain tank with only one lateral connector. As a result, the support frame can be sufficiently rigid to support the grain tank.

An opening extending from the front to the rear is formed in the laterally outer side of the threshing device, the front support is positioned forward of the front end of the opening, and the rear support is positioned forward of the rear end of the opening. Located on the rear side, the support frame does not overlap the opening when viewed from the side of the fuselage. As a result, when performing maintenance work inside the threshing apparatus, removing the lid to open the opening makes it possible to easily perform work such as removal of members inside the threshing apparatus.

Therefore, in a combine harvester in which the grain tank is provided above the threshing device, the grain tank can be well supported, and maintenance work inside the threshing device can be easily performed. .

In the present invention, the grain tank is provided in a state of projecting outward on one horizontal side with respect to the threshing device, and the first horizontal connecting body is located on one horizontal side more than the second horizontal connecting body. It is preferable to be provided in a state of being located on the outside side and to support the projecting portion to the outside side of the one horizontal side of the grain tank from below.

According to this configuration, the storage amount can be increased by projecting the grain tank outward on one lateral side. The first horizontal connecting body is located on the outer side of one horizontal side of the second horizontal connecting body located near the threshing device, and the first horizontal connecting body supports the overhanging part of the grain tank. As a result, it becomes possible to stably support the grain tank at wide intervals in the horizontal direction.

In the present invention, the threshing device is provided with a threshing cylinder and an arcuate receiving net along the outer circumference of the threshing cylinder, and the second laterally connected body is located on one lateral side of the threshing cylinder. and facing the handling cylinder, the second lateral connecting body has a laterally inner side facing the handling cylinder formed of a smooth flat surface along the vertical direction, The width of the upper part is wider than the width of the lower part, and the receiving net is provided in a state of being circumferentially connected to the laterally inner side surface of the second laterally directed connecting body, and Preferably, a bracket is connected to the laterally outward side of the narrow lower portion of the second lateral connector.

According to this configuration, when the handling cylinder rotates to handle and process the harvested culms, the smooth side surface on the laterally inner side of the second horizontally facing connector smoothly guides the harvested culms without being caught and retained. It is then transported to the receiving net, and the shedding action can be exhibited satisfactorily.

The laterally outward side of the lower portion of the second laterally directed connecting body is in a state of being inserted into the laterally inward side of the upper portion. A bracket for connecting the receiving net is connected to the place where the net is inserted. As a result, when the cover is attached to the laterally outward side of the upper portion of the second laterally connected body, the bracket for connecting the receiving net does not interfere, and the cover can be satisfactorily attached. be.

In the present invention, the threshing device is provided with a top plate that covers the upper part of the threshing chamber, and the second lateral connecting body protrudes laterally outward from the lateral one-side outer end of the top plate. A top plate placing portion for placing and supporting the top plate on the upper part of the second horizontal connecting body, and supporting the vertically connecting body laterally outside the top plate placing portion It is preferable if a connector support is provided.

According to this configuration, the upper part of the second horizontal connector is used to place and support the top plate and to support the vertical connector. The structure can be simplified by using the same member as compared with the case in which a frame body for supporting each is separately provided.

In the present invention, the bottom screw for conveying the grains stored in the grain tank outward on one horizontal side is provided at the bottom of the grain tank in a state of extending in the horizontal direction, and the vertically connected body is positioned below the bottom screw when viewed from the side.

According to this configuration, the bottom screw of the grain tank is often provided near the central position in the width direction in order to efficiently perform the work of discharging the grain. As a result, the point located below the bottom screw is close to the center of gravity of the grain tank and is the point where the load on the second lateral connector is high. By providing the vertically oriented connecting body at a location where the load is large, the load burden of the second horizontally oriented connecting body can be reduced, and the rigidity of the entire support frame can be increased accordingly.

In the present invention, the engine is provided above the threshing device and behind the grain tank, and the vertical connecting body is positioned below the output shaft of the engine in a side view. It is preferably provided in position.

According to this configuration, the output shaft of the engine is often provided near the center position of the engine. As a result, the portion located below the output shaft is close to the center of gravity of the engine and is a portion where the load on the second lateral coupling body is large. By providing the vertically oriented connecting body at a location where the load is large, the load burden of the second horizontally oriented connecting body can be reduced, and the rigidity of the entire support frame can be increased accordingly.

It is the whole combine side view. It is the whole combine top view. It is a longitudinal side view of a threshing device. It is a side view showing a frame structure. It is a side view of the left side wall part in the state which removed the lid. It is a side view of a right side wall part. It is a perspective view showing a frame structure. It is a longitudinal front view of a threshing device. It is a top view which shows the sliding state of a top plate. It is a longitudinal side view of the front wall part of a top plate. It is a front view of a threshing entrance plate arrangement part. It is sectional drawing which shows the connection state of a threshing inlet plate. It is a top view of the top plate of another embodiment. It is a longitudinal front view of the top plate of another embodiment. FIG. 4 is a cross-sectional view of the bolt connection before connection; FIG. 10 is a cross-sectional view of the bolt connection part after connection;

An embodiment of the present invention will be described based on the drawings. In the following explanation, the direction of the arrow "F" is the "front side of the aircraft" (see FIGS. 1 and 2), the direction of the arrow "B" is the "back side of the aircraft" (see FIGS. 1 and 2), and the direction of the arrow " The direction of the arrow "L" is defined as the "left side of the fuselage" (see FIG. 2), and the direction of the arrow "R" is defined as the "right side of the fuselage" (see FIG. 2).

[Overall configuration of combine harvester]
1 and 2 show a common combine as an example of the combine. This combine has a reaping and conveying unit 1 that reaps planted culms and conveys them backward, an operating unit 3 that is covered with a cabin 2, and a threshing device 4 that threshes the culms cut in the reaping and conveying unit 1. , a grain tank 5 for storing grains threshed by the threshing device 4, a driving unit 7 having an engine 6 as a power source, and a pair of left and right front wheels that are non-steerable and rotationally driven. 8. It has a pair of left and right rear wheels 9 and the like which can be steered.

As shown in FIG. 2 , the grain tank 5 is wider than the threshing device 4 in plan view, and the grain tank 5 is laterally outward from the lateral side end of the threshing device 4 on both sides in the left and right direction. It stretches out towards As shown in FIGS. 1 and 4, the grain tank 5 is formed such that the bottom surface of the grain tank 5 tapers downward when viewed from the side. A conveying bottom screw 5A is provided. On the left side of the grain tank 5, a screw conveyor type grain discharging device 10 is provided for conveying the grains conveyed by the bottom screw 5A to the outside of the machine body.

The harvesting and conveying unit 1 is provided in the front part of the machine body, and a harvesting unit 11 for harvesting planted grain culms to be planted and gathering the harvested grain culms to the central portion in the cutting width direction; A feeder 12 is provided as a conveying section for conveying the collected culms toward the threshing device 4 at the rear of the machine body. The rear end of the feeder 12 is supported by the machine body so as to be vertically swingable about the horizontal axis. The entire reaping/conveying unit 1 including the feeder 12 and the reaping unit 11 is configured to be able to swing up and down by a hydraulic cylinder (not shown) for reaping and elevating.

As shown in FIG. 3, the feeder 12 has a plurality of endless rotating chains 15 wound and stretched over a front wheel (not shown) and a rear wheel 14 in a cylindrical carrying case 13 . , and a horizontally oriented locking conveying body 16 is constructed across the endless rotating chain 15 so as to convey the crops delivered from the reaping unit 11 rearward and upward.

The threshing device 4 is located at a low position in the center in the left-right direction of the machine body, and above the threshing device 4, a grain tank 5 for storing grains after threshing by the threshing device 4, and an engine as a power source. 6 are provided. The grain tank 5 and the engine 6 are arranged side by side in the longitudinal direction, with the grain tank 5 positioned on the front side of the machine body and the engine 6 positioned on the rear side of the machine body. The right and left outer sides of the threshing device 4 are covered with exterior covers 17 .

As shown in FIGS. 1 and 4 to 8, a pair of left and right main frames 20 extending in the front-rear direction of the fuselage are provided in the lower portion of the fuselage. The left and right main frames 20 support the entire fuselage, and the main frames 20 correspond to the fuselage frame.

The left and right main frames 20 are formed in a substantially laterally U-shaped cross section, and are provided in a state of being elongated in the longitudinal direction from the front part to the rear part of the fuselage. Axles of the left and right front wheels 8 and left and right rear wheels 9 are provided at positions lower than the left and right main frames 20 . The left and right main frames 20 are supported by the left and right front wheels 8 and the left and right rear wheels 9 .

[Threshing device]
Next, the threshing device 4 will be described.
As shown in FIGS. 3 and 4, the threshing device 4 is provided with a threshing unit 21 that performs a threshing process, and a sorting unit 22 that sorts the processed material after the threshing process by the threshing unit 21. there is A threshing chamber 23 is formed inside the threshing part 21 for shaving the harvested grain culms. The sorting unit 22 is provided with a sorting processing unit 24 for sorting the processed products after the shedding process into secondary products such as grains and grains with branches, and waste straw. . A shredding device 25 for shredding discharged straw after threshing in the threshing device 4 is provided on the rear side of the machine body of the threshing device 4 .

As shown in FIGS. 4 to 8, the threshing section 21 is placed and supported by the left and right main frames 20. As shown in FIGS. The threshing part 21 includes left and right plate-shaped left and right side wall portions 26 and 27 extending along the vertical direction, a substantially plate-shaped rear wall portion 28 connecting rear end portions of the left and right side wall portions 26 and 27, and left and right The periphery is surrounded by a substantially plate-shaped front wall portion 29 that connects the front ends of the side wall portions 26 and 27, a top plate 30 that extends over the left and right side wall portions 26 and 27 and covers the upper portion, and the like. ing. The front wall portion 29 and the rear wall portion 28 are formed with openings through which the threshed material passes.

The threshing part 21 is configured such that the front part of the threshing part is narrow in the vertical direction and the rear part of the threshing part is widened in the vertical direction. The threshing part 21 is placed on a main frame 20 whose lower end extends in a substantially horizontal posture along the front-rear direction. Therefore, the upper end portion of the threshing section 21 is in a rearwardly ascending slanted posture in which the position becomes higher toward the rear side.

As shown in FIGS. 3 and 8, a handling chamber 23 is formed in a state surrounded by side walls 26 and 27 on both left and right sides and a top plate 30 on the upper side. The handling chamber 23 includes a handling cylinder 31 that rotates around an axis X along the longitudinal direction of the machine body, and a generally arcuate cylinder positioned below the handling cylinder 31 and extending along the outer periphery of the handling cylinder 31 when viewed from the front. and a receiving net 32 formed in the .

As shown in FIG. 3, the threshing cylinder 31 has a raking portion 33 positioned on the front side of the machine body for raking the harvested grain culms to the rear side of the machine body, and a raking portion 33 positioned on the rear side of the machine body of the raking part 33 to cut the reaping grain. A handling section 34 for handling the culms is provided. The raking part 33 is configured to rake the harvested grain culms sent from the feeder 12 into the inlet 35 of the hull chamber 23 into the hull chamber 23 by the spiral blades 36 . The shaving portion 34 is provided with a plurality of rod-shaped members 37 extending along the direction of the rotation axis at intervals in the circumferential direction. It is configured with teeth 38 . A threshing inlet plate 78 for receiving and guiding harvested grain culms is provided below the raking portion 33 . This threshing inlet plate 78 will be described later.

In the handling chamber 23 , harvested grain culms are fed from the feeder 12 and subjected to handling (shedding) by the handling cylinder 31 and the receiving net 32 . The handling cylinder 31 is disposed in a rearward rising inclined posture so that the rotation axis X becomes higher toward the rear side of the machine body. As with the handling cylinder 31, the receiving net 32 is arranged in a rearward rising inclined posture when viewed from the side.

As shown in FIG. 3, the sorting unit 24 oscillates and transfers the threshed material leaked from the threshing chamber 23 toward the rear, while picking up secondary materials such as grains and grains with branches, and waste straw waste. A rocking sorting device 39 for sorting grains, etc., a first grain collecting unit 40 for collecting grains, a second grain collecting unit 41 for collecting second grains, a winnow 42 for sending sorting air to the swinging sorting device 39, etc. It is

As shown in FIG. 2 , the grains collected by the first grain collecting section 40 are transported into the grain tank 5 by a grain lifting device 40A provided outside the right side wall portion 26 . The secondary product recovered by the secondary product recovery unit 41 is passed through an opening 41B (see FIG. 6) formed in the right side wall portion 26 by a secondary product return device 41A provided outside the right side wall portion 26. It is returned to the interior of the handling chamber 23 .

[Frame structure]
As shown in FIGS. 6 and 8, the right side wall portion 26 positioned on the right side of the left and right side wall portions 26 and 27 has a wall surface covering the entirety, and the front side of the fuselage is narrow in the vertical direction. It is formed wider in the vertical direction toward the rear side of the fuselage. The right side wall portion 26 is bolted to the main frame 20 with its lower end placed on the upper surface of the main frame 20 .

The right side wall portion 26 will be described.
The right side wall portion 26 includes a front support column 43 located in the front portion, a rear support column 44 located in the rear portion, and two intermediate support columns 45 and 46 spaced apart in the front and rear intermediate portions. An upper connecting body 47 connected to the upper ends of the front side strut 43, the rear side strut 44, and the two intermediate struts 45, 46 and extending in the front-rear direction, and provided below the upper connecting body 47 A plate-shaped plate-like body that covers between the intermediate connecting body 48 that connects the supporting columns 43 to 46 and the intermediate connecting body 48 and the main frame 20 is provided laterally inwardly of the supporting columns 43 to 46. , each of the struts 43 to 46 , an intermediate connecting body 48 , and a wall portion 49 integrally connected to the main frame 20 . Further, the front end portion of the right side wall portion 26 is provided with a front side support portion 50 located on the outer side of the rake portion 33 . The rear-side strut 44 has an upper-side strut portion 44A and a lower-side strut portion 44B, which are integrally connected.

As shown in FIGS. 7 and 8, the upper connecting body 47 has a substantially laterally U-shaped cross section, and extends from the front support column 43 to the rear support column 44 over the entire front-rear direction. The upper connecting body 47 includes a front connecting body portion 47A and a rear connecting body portion 47B that are connected in series. Reinforcement ribs 51 are provided at appropriate intervals in the U-shaped inner groove.

As shown in FIGS. 6 and 8, the intermediate connecting body 48 has a substantially horizontal U-shaped cross-sectional shape that is wide in the vertical direction, and extends from the front support column 43 to the rear support column 44 over the entire front-rear direction. ing. Reinforcing ribs 52 are provided in the U-shaped inner groove at appropriate intervals.

The right outer end of the top plate 30 is supported on the upper surface of the intermediate connecting body 48 . A horizontally positioned flange portion 30</b>R provided at the left outer end portion of the top plate 30 is placed and supported on the upper surface of the intermediate portion connecting body 48 . The flange portion 30R of the top plate 30 is bolt-connected to the upper surface at a plurality of locations with appropriate intervals in the front-rear direction. A restricting portion 54 is formed by bending upward into an L shape at the end portion of the upper surface of the intermediate portion connecting body 48 on the right side of the portion where the flange portion 30R of the top plate 30 is placed. As will be described later, the restricting portion 54 has a guide function of restricting the lateral position of the top plate 30 when the top plate 30 is slid forward and backward.

The left side wall portion 27 will be described.
As shown in FIGS. 4, 5, 7 and 8, the left side wall portion 27 located on the left side has a shape in which the front side of the fuselage is narrow in the vertical direction, and the width in the vertical direction gradually increases toward the rear side of the fuselage. there is The left side wall portion 27 includes a front support column 55 located in the front portion, a rear support column 56 located in the rear portion, and a first support that connects the upper end of the front support column 55 and the upper end of the rear support column 56 . A lateral connector 57, a second lateral connector 58 that connects the front-side strut 55 and the rear-side strut 56 below the first lateral connector 57, the first lateral connector 57 and the second lateral connector A plurality (three) of vertical connecting bodies 59 connecting the 58 are provided. In addition, a lower side plate-shaped portion 60 is formed in a substantially triangular shape in a side view so as to be positioned below the second lateral connecting body 58 and widen in the vertical direction toward the rear side of the fuselage, and is positioned on the rear side of the fuselage. A rear side plate-like portion 61 that is wide in the vertical direction is provided. Further, the front end portion of the left side wall portion 27 is provided with a front side support portion 62 located on the outer side of the raking portion 33 . The rear-side strut 56 includes a lower-side strut portion 56A that extends vertically at the rear end portion of the rear-side plate-like portion 61, and an upper-side strut portion 56B that connects the rear ends of the first lateral connector 57 and the second lateral connector 58. etc., which are integrally connected to form a support on the rear side.

A wide opening 63 is formed in the left side wall portion 27 at a location surrounded by the second lateral connecting body 58 , the lower side plate-like portion 60 and the rear side plate-like portion 61 . This opening 63 is closed by four lids 64 . Each of the lids 64 is detachably supported along the left-right direction of the machine body. That is, as shown in FIG. 8 , the lid body 64 is bolted with its lower end placed on the horizontal surface of the upper end of the lower side plate-shaped part 60 , and its upper end is connected to the side surface of the second horizontal connecting body 58 is bolted to the The lid body 64 can be removed outward to the left (to the right in FIG. 8) by releasing the bolt connection.

As shown in FIG. 7, the left side wall portion 27 includes a front strut 55, a rear strut 56, a first horizontal connecting body 57, a second horizontal connecting body 58, three vertical connecting bodies 59, a lower The side plate-like portion 60 and the rear side plate-like portion 61 are integrally connected to form a highly rigid frame structure as a whole. The left side wall portion 27 is provided so as not to overlap the opening 63 when viewed from the side of the fuselage. Therefore, this left side wall portion 27 corresponds to the support frame that supports the grain tank 5 .

As shown in FIG. 8 , the first horizontal connecting body 57 is provided in a state of being positioned on the left side (an example of one horizontal side) of the second horizontal connecting body 58 , and is located on the left side of the grain tank 5 . The projecting portion 65 projecting outward is supported from below. The first lateral connecting body 57 has a substantially lateral U-shaped cross section, and extends from the front support column 55 to the rear support column 56 over the entire front-rear direction. In addition, reinforcing ribs 66 are provided at appropriate intervals in the U-shaped inner groove.

As shown in FIG. 8 , the second lateral connecting body 58 is positioned outside the left side of the handling cylinder 31 and is provided so as to face the handling cylinder 31 . The second lateral connecting body 58 has a laterally inner side surface 58a facing the handling cylinder 31 formed in a smooth plane along the vertical direction. The upper portion of the second lateral connecting body 58 is wider than the lower portion.

More specifically, the second lateral connecting body 58 has a hollow cylindrical shape, with a laterally wide upper portion and a laterally narrow lower portion. A laterally inner side surface 58a facing the handling cylinder 31 is formed in a flat vertical plane from the upper end to the lower end. On the other hand, the side surface on the laterally outer side opposite to the handling drum 31 is formed stepwise so that the upper side is positioned on the outer side and the lower side is positioned on the inner side.

The receiving net 32 is provided so as to extend downward in the circumferential direction with respect to the laterally inner side surface 58 a of the second horizontal connecting body 58 , and the connecting bracket 67 extends across the width of the second horizontal connecting body 58 . It is bolted to the laterally outward side of the narrow lower portion.

The second horizontal connecting body 58 is provided in a state of projecting laterally outward from the left outer end portion of the top plate 30, and the top plate for supporting the top plate 30 is mounted on the upper part of the second horizontal connecting body 58. A mounting portion 68 and a connecting body supporting portion 69 that supports the vertical connecting body 59 on the lateral side outside of the top plate mounting portion 68 are provided.

To explain, the upper surface 58b of the second lateral connecting body 58 is formed with a flat horizontal surface from the right end to the left end. On the top plate placement portion 68 of these, a flange portion 30L in a horizontal posture provided at the left outer end portion of the top plate 30 is placed and supported. The flange portion 30L of the top plate 30 is bolted to the top plate mounting portion 68 at a plurality of locations with appropriate intervals.

On the upper surface 58 b of the second horizontal connector 58 , the lower end of the vertical connector 59 is integrally connected to the connector support portion 69 . As will be described later, the vertically oriented connecting body 59 has a guide function of restricting displacement of the top plate 30 in the left-right direction when the top plate 30 is slid in the front-rear direction.

As shown in FIG. 7, the vertical connecting body 59 is formed in a substantially U shape in plan view, the upper end is integrally connected to the first horizontal connecting body 57, and the lower end is connected to the second horizontal connecting body 58. integrally connected.

As shown in FIG. 4, the bottom surface of the grain tank 5, which is formed in a downwardly converging shape, is tilted toward the left side of the front side with the front side support member 70 interposed therebetween. 27 and the upper portion of the right side wall portion 26 are placed and supported. The bottom surface of the rear portion, which is tilted toward the rear, is placed and supported on the upper portion of the left side wall portion 27 and the upper portion of the right side wall portion 26 via the rear side support member 71 . As shown in FIG. 8, the rear support members 71 are provided on both the left and right sides, and the right rear support member 71 is supported by the upper portion of the right side wall portion 26, that is, the upper connecting member 47, and is connected by bolts. . The left rear side support 71 is supported by the upper portion of the left side wall portion 27 , that is, the first horizontal connecting member 57 and is connected by bolts.

As shown in FIG. 4 , the vertical connecting body 59 positioned at the forefront among the three vertical connecting bodies 59 is positioned below the bottom screw 5A of the grain tank 5 in a side view. ing. Also, the vertical connector 59 located at the rear end of the three vertical connectors 59 is positioned below the output shaft 6 a of the engine 6 . The vertically oriented connecting body 59 positioned midway between the front and rear is positioned below a cylindrical member 72 through which a counter shaft (not shown) for power transmission is inserted.

[Receiving network]
As shown in FIG. 5, the receiving net 32 is divided into four along the rotation axis direction of the handling cylinder 31, and each divided receiving net is detachably supported along the lateral direction. The receiving net 32 is divided at the same position as the cover body 64 on the left side wall portion 27 along the direction of the rotation axis of the handling cylinder 31, and is divided in the same direction, that is, on the left side of the machine body (right side in FIG. 8). It can be removed towards the

The receiving net 32 is composed of two receiving net components 73 and 74 divided along the circumferential direction of the handling cylinder 31 . The right receiving net structure 73 is received and guided by an arc-shaped guide member 76 attached to the front and rear side surfaces of the partition member 75, and is supported in a state where the right end is abutted against the right intermediate portion connecting member 48. It is The left end portion is bolted to a relay bracket 77 provided at the connecting portion of the left and right receiving net structures 73 and 74 . The left receiving net structure 74 is bolted to the relay bracket 77 at its right end and bolted to the second laterally directed connector 58 at its left end.

Therefore, the left receiving net structure 74 can be removed outward to the left through the opening 63 opened by removing the lid 64 by releasing the connection with the plurality of bolts. By releasing the bolt connection to the relay bracket 77 after removing the left receiving net structure 74, the right receiving net structure 73 can be removed.

[Threshing entrance plate]
As shown in FIG. 3, a threshing entrance plate for guiding the harvested grain culms conveyed by the feeder 12 to the entrance of the threshing chamber 23 is provided below the portion on the front side of the machine body corresponding to the raking portion 33 of the threshing cylinder 31 . 78 are provided. The threshing inlet plate 78 is curved so as to extend from the outlet of the feeder 12 to the inlet 35 of the threshing chamber 23 .

As shown in FIG. 11 , the threshing inlet plate 78 is divided into a right divided plate portion 79 and a left divided plate portion 80 at the separation plane in the center in the left-right direction. Of the threshing inlet plate 78 , the right split plate portion 79 is bolted to the right side support plate 81 while partially overlapping therewith. As shown in FIG. 12, the head of the bolt Bo is formed with a hexagonal hole that can be engaged with a hexagonal wrench. The bolt head has a countersunk shape, so it can be installed without any protrusions. Left split plate portion 80 is bolted to left side support plate 82 in a vertical flange connection. The front ends of the left and right divided plate portions 79 and 80 are bolted to support members (not shown) positioned below and extending in the left-right direction. The left and right divided plate portions 79 and 80 are connected to each other by lateral bolts (not shown) on the lower side of the middle of the left and right. Between the left split plate portion 80 and the left side support plate 82, a sealing member made of sponge or the like is interposed, although not shown.

The threshing inlet plate 78, even if worn by crop flow, can be easily removed by unbolting the connection. That is, with the feeder 12 removed in advance, the bolt connection between the right split plate portion 79 and the lower support member, the right side support plate 81, and the left split plate portion 80 is released, and the front of the fuselage is removed. side can be removed. The left split plate portion 80 can be removed forward from the fuselage by releasing the bolted connection with the support member and the right side support plate 82 .

〔Top board〕
The top plate 30 is provided in a substantially arc shape when viewed from the front so as to substantially follow the rotation trajectory of the outer end of the handling cylinder 31 . As shown in FIG. 8, the right side portion of the top plate 30 is formed in a smooth arc shape. A left portion of the top plate 30 is formed in a flat plate shape. The top plate 30 is integrally formed in a continuous state along the circumferential direction.

As described above, the left flange portion 30L of the top plate 30 is mounted and supported on the top plate mounting portion 68 on the upper surface of the second horizontal connecting body 58, and the right flange portion 30R of the top plate 30 is supported by the intermediate portion. It is placed and supported on the upper surface of the connecting body 48 . A portion (movable top plate portion 83) extending from a portion of the top plate 30 corresponding to the raking portion 33 of the threshing drum 31 to the portion corresponding to the threshing processing portion 34 of the threshing drum 31 is the main body of the threshing device. It is constructed so that it can be pulled out to the rear side of the machine body with respect to the part (the part of the threshing device 4 other than the top plate).

That is, as shown in FIG. 9, substantially the entire upper portion of the top plate 30 that covers the upper side of the handling cylinder 31 is configured to be removable toward the rear side of the fuselage along the direction of the rotation axis, and the front end of the top plate 30 The front wall portion 30F provided in the portion is provided in a state of being fixed to the threshing device main body portion (specifically, the front wall portion 29). The movable top plate portion 83 is configured to be divided into two parts, a front top plate portion 83F and a rear top plate portion 83B, along the longitudinal direction of the aircraft body.

As shown in FIG. 10, a flange portion 84 is provided in a state of extending rearward from the front wall portion 30F, and the front end portion of the movable top plate portion 83 is tightly fitted to the inner surface portion of the flange portion 84. is installed. Between the collar portion 84 and the front end portion of the movable top plate portion 83, a sealing material 85 made of sponge is interposed along the entire circumferential direction. The front wall portion 30F is tilted backward in order to avoid interference with the cabin 2 . Further, a horizontal mounting portion 86 provided at the lower end portion is fixed to the upper surface of the front wall portion 29 of the threshing device 4 by bolt connection. A plurality of reinforcing ribs 87 are provided across the front wall portion 29 and the mounting portion 86 .

The movable top plate portion 83 can be pulled out and removed toward the rear side of the machine body along the direction of the rotation axis of the handling cylinder 31 . When the movable top plate portion 83 is pulled out and removed, the top plate 30 is held by the restricting portion 54 provided on the upper surface of the intermediate connecting member 48 and the vertical connecting member 59 provided on the upper surface of the second horizontal connecting member 58. It can be smoothly moved rearward by being guided so as not to be displaced in the lateral direction.

When removing the movable top plate portion 83, first, the exterior cover 17 is swung open laterally outwardly around the upper shaft core to open the laterally outward side of the threshing device 4.例文帳に追加Then, the bolt connection between the left and right sides of the movable top plate portion 83 is released from the lateral side of the machine body. Next, after removing the rear wall portion 28 of the threshing device 4, the rear side top plate portion 83B is pulled out rearward while sliding the upper surface of the intermediate connecting body 48 and the upper surface of the second horizontal connecting body 58 and taken out (Fig. 9). Further, the front side top plate portion 83F is pulled out rearward while being slid to be taken out. When the rear side top plate portion 83B and the front side top plate portion 83F are removed in this way, the space above the handling cylinder 31 is largely opened, so that the handling cylinder 31 can be viewed from outside the rear side or lateral side of the machine body. Maintenance work such as repair inspection and removal of clogged straw scraps can be easily performed.

The handling chamber 23 is provided with a dust transfer valve 88 positioned on the inner surface side of the top plate 30 for transferring the threshed material from the front side of the machine body to the rear side of the machine body. The plurality of dust feed valves 88 are each attached to the inner surface of the top plate 30 and are provided in a state of being positioned on the outer peripheral side of the handling cylinder 31 and extending in a substantially spiral shape. That is, it is provided in a state of having a predetermined feed angle so as to transfer the threshed material to the rear side of the machine body with respect to the rotation of the shaving teeth 38 .

Each of the plurality of dust valves 88 includes a fixed dust valve portion 88a attached to the top plate 30 in a position-fixed state, and a fixed dust valve portion 88a adjacent to the fixed dust valve portion 88a in the circumferential direction. A movable dust valve portion 88b is provided which is variable and adjustable.

As shown in FIG. 8, the fixed dust valve portion 88a is attached to the inner surface of the right arcuate portion of the top plate 30, and the movable dust valve portion 88b is attached to the inner surface of the left flat plate portion of the top plate 30. installed. Although not shown because it has a well-known structure, the movable dust valve portion 88b is swingably supported around the axis of the support shaft 89, and is configured so that the swing angle can be changed and adjusted by manual operation. there is

[Another embodiment]
(1) In the above embodiment, the movable top plate portion 83 is divided into two front and rear portions, but instead of this structure, the movable top plate portion 83 may be divided into three or more pieces. , the whole may be connected integrally without being divided.

(2) In the above embodiment, the top plate 30 is configured to have a substantially arc shape when viewed from the front, but instead of this configuration, the following configuration may be used.
That is, as shown in FIGS. 13 and 14, a wide flat surface portion 90 is formed on the top plate 30 and a dust valve 91 is provided on the inner surface side of the flat surface portion 90 . A rotation fulcrum 92 is provided in the laterally intermediate portion of the dust feed valve 91, and both left and right sides swing the balance to change the feed angle. An interlocking operation member 94 extending over a plurality of (four) dust feed valves 91 is provided so that the angles of the plurality (four) dust feed valves 91 can be adjusted in conjunction with one operation tool 93 . A plate-like cover member 95 is interposed at the bolt connection point that connects the interlocking operation member 94 and the dust valve 91 to cover the long hole for adjustment. is formed. Then, as shown in FIGS. 15 and 16, when tightened with bolts, the central portion is deformed so as to be slightly recessed downward, and both sides in the width direction are in a line contact state. With this configuration, it is possible to reduce the frictional resistance in the sliding operation while ensuring the function of closing the long hole.

(3) In the above embodiment, the first lateral connecting body 57 is provided in a state of being located on the outer side of the second lateral connecting body 58, but instead of this configuration, the first lateral connecting body The connecting body 57 and the second laterally connecting body 58 may be provided at the same position in the horizontal direction, with the first laterally connecting body 57 positioned inward on one lateral side of the second laterally connecting body 58. It may be prepared.

(4) In the above embodiment, the upper portion of the second horizontal connecting body 58 is wider than the lower portion, but the second horizontal connecting body 58 may have the same width on both sides. , the upper portion may be narrower than the lower portion.

(5) In the above embodiment, the top plate placing portion 68 is provided on the upper portion of the second horizontal connecting body 58, but instead of this configuration, a dedicated support member for supporting the top plate 30 is provided. may

(6) In the above embodiment, the vertically oriented connecting body 59 is provided under the bottom screw 5A of the grain tank 5, but instead of this configuration, the vertically oriented connecting body 59 A configuration not provided below 5A may also be used.

(7) In the above embodiment, the vertically oriented connector 59 is positioned below the output shaft 6 a of the engine 6 . A configuration in which it is not provided below the shaft 6a is also possible.

(8) In the above embodiment, three vertical connectors 59 are provided, but instead of this configuration, one, two, or four vertical connectors 59 may be provided. It is good also as a structure provided above.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to a normal combine harvester but also to a self-threshing combine harvester as long as the combine has a grain tank positioned above the threshing device.

4 Threshing device 5 Grain tank 5A Bottom screw 6 Engine 6a Output shaft 20 Body frame 23 Handling chamber 27 Support frame 30 Top plate 31 Handling barrel 32 Receiving net 55 Front side strut 56 Rear side strut 57 First horizontal connector 58 Second Two horizontal connecting bodies 58a side surface 59 vertical connecting body 63 opening 67 bracket 68 top plate mounting part 69 connecting body support part

Claims (6)

a threshing device that is provided in a state of being supported by the body frame and that threshes the harvested culms;
A grain tank provided in a state located above the threshing device and storing grains obtained by threshing;
A support frame that supports the grain tank with respect to the machine frame,
An opening is formed on the laterally outer side of the threshing device, extending from the front portion to the rear portion of the threshing device and closed by a lid so as to be openable and closable,
The support frame is
a front-side support positioned forward of the front end of the opening; a rear-side support positioned rearward of the rear end of the opening; and an upper end of the front-side support and an upper end of the rear-side support. a second lateral connector that connects the front-side column and the rear-side column between the first lateral connector and the upper end of the opening; and the first lateral connector: and a vertically oriented connecting body that connects the second horizontally oriented connecting body, and is provided so as not to overlap with the opening when viewed from the side of the fuselage. The grain tank is provided in a state of projecting outward on one lateral side with respect to the threshing device,
The first horizontal connecting body is provided in a state of being located on the outer side of one horizontal side than the second horizontal connecting body, and the projecting portion of the grain tank to the outer side of the one horizontal side is projected from below. 2. A combine according to claim 1, supporting. The threshing device is equipped with a threshing cylinder and an arc-shaped receiving net along the outer circumference of the threshing cylinder,
The second lateral connecting body is provided in a state of being positioned on the outer side of one lateral side of the handling cylinder and facing the handling cylinder,
The second lateral connecting body has a laterally inner side surface facing the handling cylinder formed in a smooth plane along the vertical direction, and the width of the upper portion is wider than the width of the lower portion. ,
The receiving net is provided so as to be circumferentially connected to the laterally inner side surface of the second laterally connected body, and the connecting bracket is laterally connected to the narrow lower portion of the second laterally connected body. 3. A combine according to claim 1 or 2, which is connected to the outer side. The threshing device is equipped with a top plate covering the upper part of the threshing chamber,
The second lateral connecting body is provided in a state of protruding laterally outward from an outer end portion of the top plate on one lateral side,
A top plate placement portion for placing and supporting the top plate on the upper portion of the second horizontal connection, and a connection support portion for supporting the vertical connection outside the top plate placement portion on the lateral side of the top plate placement portion. 4. A combine according to any one of claims 1 to 3, comprising: A bottom screw for conveying the grains stored in the grain tank outward on one horizontal side is provided at the bottom of the grain tank in a state extending in the horizontal direction,
The combine according to any one of claims 1 to 4, wherein the longitudinal connecting body is positioned below the bottom screw in a side view. An engine is provided above the threshing device and behind the grain tank,
The combine according to any one of claims 1 to 5, wherein the vertical connecting body is positioned below the output shaft of the engine in a side view.

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