Harvester

Abstract

The present invention provides a harvester, which is provided with a threshing device for receiving harvested material harvested by a harvesting unit and performing threshing processing, and the threshing barrel of the threshing device is provided with a threshing unit for pushing the threshed material put into the threshing chamber toward the rear of the threshing barrel, and a threshing processing unit for threshing the threshed material from the threshing unit. In the harvester, regardless of the nature or state of the harvested material, the harvested material can be smoothly pushed into the threshing processing unit by the threshing unit. The threshing unit (30) is provided with: a base unit (32); a spiral blade (33) which stands from the outer periphery of the base unit (32) toward the outside in the threshing barrel radial direction and pushes the threshed material toward the rear of the threshing barrel (21). A shape changing mechanism (55) for changing the shape of the threshing unit (30) is provided.

Description

Technical Field

[0001] The invention relates to a harvester, in particular to a harvester for threshing whole stalks of harvested crops. Background Art

[0002] The harvester comprises: a harvesting section, which is arranged at the front part of the machine body and harvests crops in the field; a conveying device, which conveys the crops harvested by the harvesting section to the rear part of the machine body; a threshing device, which receives the crops conveyed by the conveying device as threshing materials and threshes the received threshing materials, the threshing device comprises a threshing chamber, a threshing drum and a screen, the threshing chamber uses the conveying device to input the crops as threshing materials, the threshing drum is rotatably arranged in the threshing chamber, and threshes the threshing materials input into the threshing chamber, and the screen is arranged around the lower part of the threshing drum. In addition, in this harvester, the threshing drum includes a threshing section and a threshing processing section. The threshing section is arranged at the front of the threshing drum to push the threshed material put into the threshing chamber toward the rear of the threshing drum. The threshing processing section is arranged in a continuous state with the rear of the threshing section to thresh the threshing material from the threshing section.

[0003] As such a harvester, there is a combine harvester as shown in Patent Document 1. The combine harvester as shown in Patent Document 1 is provided with a harvesting section as a harvesting section, a conveying section as a conveying device, and a threshing device. The threshing device is provided with a threshing chamber and a threshing drum, and the threshing drum is provided with a threshing section and a threshing processing section. The harvesting section as a harvesting section is provided with a conveying section as a conveying device.

[0004] As a harvester for threshing whole stalks of harvested crops, as disclosed in Patent Document 2, crops in a field are harvested by a harvesting unit, the crops are transported to the rear by a conveying device, and are thrown into a threshing chamber from the entrance of the threshing device. A threshing drum is provided in the threshing chamber of the threshing device in a manner that it can rotate around a front-rear axis along the front-rear direction, and the crops thrown into the threshing chamber are threshed by the threshing drum.

[0005] In Patent Document 2, a hoe pulling part having spiral blades is provided at the front part of a threshing drum, and a guide part is provided below the hoe pulling part.

[0006] Thus, if crops are put into the threshing chamber from the entrance of the threshing device by the conveying device, the spiral blades of the threshing part will push the crops into the threshing chamber as the threshing cylinder rotates, and the crops are guided to the threshing chamber along the guide part.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2019-4765

[0010] Patent Document 2: Japanese Patent Application Publication No. 2015-146802 Summary of the invention

[0011] Problems to be solved by the invention

[0012] In the past, if the crops to be harvested have different properties and states, the threshed material put into the threshing chamber may be clogged in the threshing section and cannot be smoothly pulled into the pulling section, thereby preventing smooth threshing.

[0013] In the past, the harvested material (threshed material) put into the threshing chamber was only subjected to the threshing action of the screen in the threshing process part. Therefore, when a large amount of harvested material was put into the threshing chamber, the harvested material discharged from the threshing chamber was easily mixed with the harvested material that was not fully subjected to the threshing action and was discharged. So-called poor threshing was likely to occur.

[0014] In the above-mentioned harvester, the hoe section usually includes a base section and a spiral blade, the spiral blade rises from the outer peripheral portion of the base section toward the radially outer side of the threshing cylinder to push the threshed material toward the rear of the threshing cylinder. In the past, the base section was configured to have a front side tapered shape with a smaller diameter toward the front end side of the hoe section, making it difficult to manufacture the hoe section and increasing the manufacturing cost of the threshing cylinder.

[0015] In Patent Document 2, since the threshing drum is driven to rotate around the front and rear axis, the spiral blades of the threshing part describe an arc trajectory in a front view.

[0016] Compared with the spiral blades of the reed-pulling part that describe an arc trajectory in the front view, the guide part is mostly not in an arc shape in the front view, so there is a portion in the guide part that is difficult for the spiral blades of the reed-pulling part to reach. Since crops may be trapped in the portion that is difficult for the spiral blades of the reed-pulling part to reach, there is still room for improvement.

[0017] The invention provides a harvester which can smoothly push threshed materials into the threshing processing part by using the threshing part regardless of the nature and state of the crops.

[0018] The present invention provides a harvester which can easily avoid threshing failure even when a large amount of threshed material is put into a threshing chamber.

[0019] The present invention provides a harvester capable of obtaining a threshing drum at low cost.

[0020] The purpose of the present invention is to reduce the parts that are difficult to reach by the spiral blades of the threshing part when the crops are thrown into the threshing chamber from the entrance of the threshing device through the conveying device, and then the crops are pushed into the harvester in the threshing chamber through the spiral blades of the threshing part and the guide part.

[0021] Means for solving problems

[0022] The harvester of the present invention comprises: a harvesting section, which is arranged at the front part of the machine body and harvests crops in the field; a conveying device, which conveys the crops harvested by the harvesting section toward the rear of the machine body; and a threshing device, which receives the crops conveyed by the conveying device as threshing materials and performs threshing on the received threshing materials, and the threshing device comprises: a threshing chamber, into which the crops are put as threshing materials by the conveying device; a threshing cylinder, which is rotatably arranged in the threshing chamber and performs threshing on the threshing materials put into the threshing chamber; and a screen, which is arranged in the Around the lower part of the threshing cylinder, the threshing cylinder comprises: a threshing portion, which is arranged at the front part of the threshing cylinder and pushes the threshed material put into the threshing chamber toward the rear part of the threshing cylinder; and a threshing processing portion, which is arranged in a continuous state with the rear part of the threshing portion and thres the threshing material from the threshing portion, the threshing portion comprises: a base portion; a spiral blade, which stands from the outer peripheral part of the base portion toward the radial outer side of the threshing cylinder and pushes the threshing material toward the rear part of the threshing cylinder, and the harvester comprises a shape changing mechanism for changing the shape of the threshing portion.

[0023] According to this structure, even if the nature and state of the crops to be harvested are different, the shape of the threshing section can be changed accordingly to the nature and state of the crops. Therefore, regardless of the characteristics of the crops, the threshed materials can be smoothly threshed into the threshing section using the threshing section.

[0024] In the present invention, it is preferable that the shape changing mechanism is configured to change the shape of the farming portion into a first state and a second state in which a front-to-rear length is shorter than that of the first state.

[0025] According to this structure, the front-to-rear length of the threshing part when the shape of the threshing part is changed to the first state is longer than the front-to-rear length when the shape of the threshing part is changed to the second state, and the front-to-rear length of the threshing part when the shape of the threshing part is changed to the second state is shorter than the front-to-rear length when the shape of the threshing part is changed to the first state. Therefore, by changing the shape of the threshing part to the first state and the second state corresponding to the nature and state of the crop, the threshed material can be reliably threshed into the threshing process part regardless of the nature and state of the crop, or the threshed material can be threshed into the threshing process part in a manner that does not damage the threshed material.

[0026] In the present invention, it is preferred that the harvester has an auxiliary threshing processing unit, and the auxiliary threshing processing unit can be switched between a use state and a non-use state, the use state is a state in which the threshing unit is arranged in a loadable and detachable manner between the threshing unit in the second state, and the non-use state is a state in which the threshing unit is not arranged between the threshing unit in the first state and the threshing unit.

[0027] According to this structure, by appropriately setting the front and rear length of the auxiliary threshing processing unit, the front and rear length obtained by summing up the front and rear lengths of the threshing processing unit when the shape of the threshing unit is changed to the first state and the front and rear length obtained by summing up the front and rear lengths of the threshing processing unit when the shape of the threshing unit is changed to the second state can be made the same. Therefore, regardless of how the shape of the threshing unit is changed, threshing can be performed while keeping the entire front and rear length of the threshing drum constant.

[0028] In the present invention, it is preferred that the base portion is constructed as a cylindrical shape with a front-side thin shape whose diameter becomes smaller as it approaches the front end side of the threshing barrel and is centered on the axis of the threshing barrel, and the harvester is provided with a supporting component, the supporting component is connected to the rear end portion of the base portion of the threshing barrel portion in the second state and the threshing barrel support shaft, and the rear end portion of the threshing barrel portion in the second state is supported on the threshing barrel support shaft, and the supporting component is constructed to be able to change its state between a first supporting component state and a second supporting component state, the first supporting component state is a state located on the inner side of the middle portion in the front-to-back direction of the base portion of the threshing barrel portion in the first state, and the second supporting component state is a state connected to the rear end portion of the threshing barrel portion in the second state and the threshing barrel support shaft and having an outer diameter larger than the outer diameter in the first supporting component state.

[0029] According to the present structure, by changing the supporting component to the first supporting component state, the supporting component is located on the inner side of the middle part in the front-to-back direction of the base part in the rice-pushing part whose shape is changed to the first state, and by changing the supporting component to the second supporting component state, the supporting component becomes a component that supports the rear end part of the base part in the rice-pushing part whose shape is changed to the second state on the threshing barrel support shaft. Therefore, compared with the case where the entire supporting component is disassembled in order to change the shape of the rice-pushing part to the first state so that the supporting component does not become an obstacle, or the case where the entire supporting component is installed in order to change the shape of the rice-pushing part to the second state so that the supporting component can support the base part, it is sufficient to only change the supporting component to the first supporting component state and the second supporting component state, and the rice-pushing part can be changed to the first state and the second supporting component state.

[0030] In the present invention, it is preferred that the support member comprises: a first support member supported by the threshing cylinder support shaft; and a second support member having an inner diameter smaller than the outer diameter of the first support member and an outer diameter larger than the outer diameter of the first support member, and capable of being loaded and unloaded relative to the first support member.

[0031] By coupling the second supporting member to the first supporting member, the supporting member is in the second supporting member state, and by removing the second supporting member from the first supporting member, the supporting member is in the first supporting member state.

[0032] According to this configuration, the support member can be easily changed between the first support member state and the second support member state simply by performing the operation of attaching and detaching the second support member to the first support member.

[0033] In the present invention, it is preferable that the second support member is configured to detachably support the front end portion of the threshing processing unit when the second support member is removed from the first support member.

[0034] According to this structure, the second support member removed from the first support member can be mounted and stored in the front end portion of the threshing process portion without being removed from the barrel, so that storing the second support member or mounting the second support member to the first support member does not require much trouble.

[0035] In the present invention, preferably, when the shape of the reel is changed to the first state, the front portion of the screen is located directly below the rear portion of the reel, and the rear portion of the reel overlaps the front portion of the screen in the front-rear direction.

[0036] According to this structure, when the shape of the threshing section is changed to the first state, before the threshed material is supplied between the threshing section and the screen and threshed by the threshing section and the screen, threshing is performed by the spiral blades and the screen at the rear of the threshing section. Therefore, even when a large amount of threshing material is put into the threshing chamber, poor threshing can be easily avoided.

[0037] In the present invention, it is preferred that the threshing processing section is provided with: a rod-shaped threshing tooth supporting component, which is arranged in a state along the circumferential direction of the threshing cylinder and along the axial direction of the threshing cylinder; and a plurality of threshing teeth, which are a plurality of threshing teeth protruding from multiple positions of the threshing tooth supporting component in the axial direction of the threshing cylinder toward the radial outside of the threshing cylinder.

[0038] According to this structure, in the threshing processing part, the threshed material flows between the inside and the outside of the threshing cylinder through the threshing tooth supporting parts, and is subjected to the threshing action of the threshing teeth and the screen, and is subjected to the threshing action generated by the impact of the threshing tooth supporting parts. Therefore, even when a large amount of threshing material is put in, the threshing material will not be blocked, the threshing process can be carried out smoothly, and poor threshing can be easily avoided.

[0039] The harvester of the present invention comprises: a harvesting section, which is arranged at the front part of a machine body and harvests crops in a field; a conveying device, which conveys the crops harvested by the harvesting section toward the rear part of the machine body; a threshing device, which receives the crops conveyed by the conveying device as threshing processed materials and threshes the received threshing processed materials, and the threshing device comprises: a threshing chamber, into which crops are fed as threshing processed materials through the conveying device; a threshing drum, which is rotatably arranged in the threshing chamber and threshes the threshing processed materials fed into the threshing chamber; and a screen, which is arranged around the lower part of the threshing drum and is arranged at the bottom of the threshing drum. The threshing cylinder comprises: a threshing portion, which is arranged at the front part of the threshing cylinder and pushes the threshed material put into the threshing chamber toward the rear part of the threshing cylinder; and a threshing processing portion, which is arranged in a continuous state with the rear part of the threshing portion and thres the threshing material from the threshing portion, and the threshing portion comprises: a base portion; and a spiral blade, which stands from the outer peripheral part of the base portion toward the radial outer side of the threshing cylinder and pushes the threshing material toward the rear part of the threshing cylinder, the front part of the screen extends to directly below the rear part of the threshing portion, and the rear part of the threshing portion overlaps with the front part of the screen in the front-to-back direction.

[0040] According to this structure, before the threshed material is supplied between the threshing section and the screen and threshed by the threshing section and the screen, threshing is performed by the spiral blades and the screen at the rear of the threshing section. Therefore, even when a large amount of threshed material is put into the threshing chamber, poor threshing can be easily avoided.

[0041] In the present invention, preferably, the front portion extends to right below a front-rear center portion of the reel, and the front-rear center portion of the reel overlaps with the front portion in the front-rear direction.

[0042] According to this structure, the distance that the threshed material is threshed by the spiral blade and the screen while being conveyed by the spiral blade in the threshing part becomes longer, so even when a large amount of threshed material is put into the threshing chamber, it is easier to avoid threshing defects.

[0043] In the present invention, it is preferable that the base portion is configured in a front side tapered shape in which the diameter decreases toward the front end side of the barrel.

[0044] According to this structure, the amount of threshing material put into the front part of the threshing chamber and stored under the base part can be increased. In addition, since the base part is a shape with a thin front side, even if the front part of the screen is extended to just below the rear part of the dial-in part, the interval between the front part of the screen and the base part is widened, and the threshing material will not be blocked. Therefore, even if a large amount of threshing material is put in, the threshing material will not be blocked and the threshing process can be smoothly performed.

[0045] In the present invention, it is preferred that a guide portion is provided, which is arranged below the tilling portion in a state of being inclined downward and forward, and guides the threshed material put into the front part of the threshing chamber toward the tilling portion, and the depression angle of the guide portion is greater than the elevation angle of the lower end of the base portion.

[0046] According to this structure, the amount of threshing material that is put into the front part of the threshing chamber and stored between the base part and the guide part can be increased. In addition, the distance between the front end of the screen and the base part becomes wider, and the threshing material will not be blocked. Therefore, even if a large amount of threshing material is put in, the threshing material will not be blocked and the threshing process can be smoothly performed.

[0047] In the present invention, preferably, the spiral blades are provided in a state of four in parallel.

[0048] According to this structure, the threshing material put into the front part of the threshing chamber is pushed into the threshing process part by the four parallel spiral blades. Therefore, even if a large amount of threshing material is put in, the threshing material will not be blocked and the threshing process can be smoothly performed.

[0049] In the present invention, it is preferred that the threshing processing section includes a rod-shaped threshing tooth support component arranged in a circumferential direction of the threshing cylinder and oriented along the axial direction of the threshing cylinder, and a plurality of threshing teeth protruding from a plurality of positions of the threshing tooth support component in the axial direction of the threshing cylinder toward the radially outer side of the threshing cylinder.

[0050] According to this structure, in the threshing processing section, the threshed material flows between the inside and the outside of the threshing cylinder through the threshing tooth supporting parts, and is subjected to the threshing action of the threshing teeth and the screen. Moreover, because of the threshing action generated by the impact of the threshing tooth supporting parts, even when a large amount of threshing material is put in, the threshing material will not be blocked and the threshing process can be carried out smoothly, and poor threshing can be easily avoided.

[0051] The threshing device of the present invention comprises: a harvesting part, which is arranged at the front part of the machine body and harvests crops in the field; a conveying device, which conveys the crops harvested by the harvesting part toward the rear part of the machine body; a threshing device, which receives the crops conveyed by the conveying device as threshing processed materials and threshes the received threshing processed materials, and the threshing device comprises: a threshing chamber, into which crops are fed as threshing processed materials through the conveying device; a threshing drum, which is rotatably arranged in the threshing chamber, and threshes the threshing processed materials fed into the threshing chamber; and a screen, which is arranged around the lower part of the threshing drum. The threshing cylinder comprises: a threshing portion, which is arranged at the front part of the threshing cylinder and pushes the threshed material put into the threshing chamber toward the rear part of the threshing cylinder; and a threshing processing portion, which is arranged in a state continuous with the rear part of the threshing portion and thres the threshing material from the threshing portion, and the threshing portion comprises: a base portion; and a spiral blade, which stands from the outer peripheral part of the base portion toward the radial outer side of the threshing cylinder and pushes the threshing material toward the rear part of the threshing cylinder, and the base portion is constructed into a cylindrical shape with an outer diameter that is constant from the front end to the rear end of the threshing portion and is centered on the axis core of the threshing cylinder.

[0052] According to this structure, since the shape and structure of a base part are simple, it becomes easy to manufacture a hoe part, and a threshing cylinder can be obtained at low cost.

[0053] In the present invention, it is preferable that a corner portion of the spiral blade at the tip end opposite to the base portion side is angular.

[0054] According to this structure, the threshed material put into the front part of the threshing chamber is easily caught on the front end of the spiral blade, so even if a large amount of threshing material is put in, the threshing material can be reliably pushed into the threshing part by the threshing part and the threshing process can be smoothly performed.

[0055] In the present invention, it is preferable that a standing height of a tip end portion of the spiral blade from the outer peripheral portion is higher than a standing height of a portion of the spiral blade other than the tip end portion from the outer peripheral portion.

[0056] According to this structure, the threshed material hooked on the front end of the spiral blade is difficult to be separated from the spiral blade. Therefore, even if a large amount of threshed material is put in, the threshed material is reliably pushed into the threshing process part by the hoe part and threshing is smoothly performed.

[0057] In the present invention, it is preferred that the conveying device includes a rotating component, which is rotatably arranged at the conveying terminal portion of the conveying device with an axis core along the horizontal width direction of the threshing chamber as a rotation center, and the crops are put into the threshing chamber as threshing processed materials by being rotationally driven, and the axis core is arranged at a position of the screen that is lower than the lower end of the side circumference of the threshing barrel.

[0058] According to this structure, the threshing material thrown into the front part of the threshing chamber by the rotating part is easily supplied to the spiral blade from below the spiral blade and hooked on the spiral blade. Therefore, even when a large amount of threshing material is thrown in, the threshing material can be reliably pushed into the threshing process part by the threshing part and the threshing process can be smoothly carried out.

[0059] In the present invention, it is preferred that the conveying device includes a rotating component, which is rotatably arranged at the conveying terminal portion of the conveying device with an axis core along the horizontal width direction of the threshing chamber as a rotation center, and the crops are put into the threshing chamber as threshing products by being rotationally driven, and the axis core is arranged at a position lower than the lower end of the spiral blade.

[0060] According to this structure, the threshing material thrown into the front part of the threshing chamber by the rotating part is easily supplied to the spiral blade from below the spiral blade and hooked on the spiral blade. Therefore, even when a large amount of threshing material is thrown in, the threshing material can be reliably pushed into the threshing process part by the threshing part and the threshing process can be smoothly carried out.

[0061] In the present invention, preferably, the front portion of the screen extends to directly below the rear portion of the reel portion, and the rear portion of the reel portion overlaps the front portion of the screen in a front-to-rear direction.

[0062] According to this structure, before the threshed material is supplied between the threshing section and the screen and threshed by the threshing section and the screen, threshing is performed by the spiral blades and the screen at the rear of the threshing section. Therefore, even when a large amount of threshed material is put into the threshing chamber, poor threshing can be easily avoided.

[0063] In the present invention, it is preferred that the threshing processing section includes a rod-shaped threshing tooth support component arranged in a circumferential direction of the threshing cylinder and oriented along the axial direction of the threshing cylinder, and a plurality of threshing teeth protruding from a plurality of positions of the threshing tooth support component in the axial direction of the threshing cylinder toward the radially outer side of the threshing cylinder.

[0064] According to this structure, in the threshing processing part, the threshed material flows between the inside and the outside of the threshing cylinder through the threshing tooth supporting parts, and is subjected to the threshing action of the threshing teeth and the screen. In addition, because of the threshing action generated by the impact of the threshing tooth supporting parts, the threshing material will not be blocked even when a large amount of threshing material is put in, and the threshing process can be carried out smoothly, and poor threshing can be easily avoided.

[0065] The harvester of the present invention comprises: a harvesting section, which is arranged at the front part of the machine body and harvests crops in the farmland; a conveying device, which conveys the crops harvested by the harvesting section to the rear; and a threshing device, which receives the whole stalks of the crops conveyed by the conveying device and performs threshing, wherein the threshing device comprises: a threshing chamber, into which the whole stalks of the crops from the conveying device are put; and a threshing drum, which is arranged in the threshing chamber in a manner that can rotate around the front and rear axis core along the front and rear direction, and performs threshing on the crops put into the threshing chamber, the harvester comprises a threshing section, which is arranged at the front part of the threshing drum and has a spiral blade that pushes the crops into the threshing chamber as the threshing drum rotates, the harvester comprises a guide section, which is arranged below the threshing section and guides the crops put in from the conveying device from the entrance of the threshing device to the threshing chamber, and at least one of the right corner and the left corner of the guide section comprises a guide section that guides the crops toward the left and right central parts of the guide section.

[0066] The right and left corners of the guide portion are farther away from the spiral blades of the reeling portion that describe an arc trajectory when viewed from the front. Therefore, the right and left corners of the guide portion can be considered as parts that are difficult for the spiral blades of the reeling portion to reach.

[0067] According to the present invention, since a guide portion for guiding crops toward the left and right central portions of the guide portion is provided at at least one of the right and left corner portions of the guide portion, the portion that is difficult for the spiral blades of the tilling portion to reach can be reduced in accordance with the existence of the guide portion.

[0068] Since the number of parts that are difficult for the spiral blades of the hoe section to reach is reduced, the possibility of crop retention can be reduced, and the crops can flow smoothly from the conveying device to the threshing device, thereby improving the harvesting performance of the harvester.

[0069] In the present invention, it is preferable that at least one of the right corner and the left corner of the guide portion bulges toward the left and right center portions of the guide portion to form the guide portion.

[0070] According to the present invention, since the surface irregularities of the guide portion are reduced, crops are less likely to adhere to and stay on the guide portion, so that the crops flow smoothly from the conveying device to the threshing device.

[0071] In the present invention, it is preferable that the guide portion is provided at a corner portion of the guide portion located on the downstream side in the rotation direction of the barrel, of the right corner portion and the left corner portion of the guide portion.

[0072] It can be considered that when the tiller section is rotating, the crops thrown between the tiller section and the guide section are likely to flow toward the downstream side of the rotation direction of the tiller section (thresher cylinder) in a front view due to the rotation of the tiller section, and the crops are likely to be retained at the corner of the guide section located on the downstream side of the rotation direction of the thresher cylinder.

[0073] According to the present invention, since the guide portion is provided at the corner of the guide portion located downstream in the rotation direction of the threshing drum, the spiral blade of the threshing unit can easily reach the portion where crops are likely to accumulate, and the crops can flow smoothly from the conveying device to the threshing device.

[0074] In the present invention, it is preferable that an upper end portion of the guide portion is formed in a shape along a rotation trajectory of the spiral blade in a front view.

[0075] According to the present invention, since the upper end portion of the guide portion is formed in a shape along the rotation trajectory of the spiral blade when viewed from the front, the upper end portion of the guide portion can be reasonably close to the spiral blade of the tiller portion, so the portion that is difficult for the spiral blade of the tiller portion to reach is reduced, and the crop can flow smoothly from the conveying device to the threshing device.

[0076] In the present invention, it is preferred that a portion of the guide portion that faces the left and right center portions of the guide portion has a guide surface that is inclined relative to the front and rear axis when viewed from above, so as to guide the crops input from the conveying device toward the left and right center portions of the guide portion.

[0077] According to the present invention, when the spiral blades of the tiller section push the crops into the threshing chamber, if the crops come into contact with the guide surface of the guide section, the crops are guided by the guide surface of the guide section toward the left and right central parts of the guide section, and it is difficult for the crops to leave the spiral blades of the tiller section, so the crops can flow smoothly from the conveying device to the threshing device.

[0078] In the present invention, it is preferable that the upper surface portion of the guide portion is formed in a tilted state that becomes higher as it approaches the threshing chamber in a side view.

[0079] According to the present invention, when the spiral blades of the hoe part push the crops into the threshing chamber, the crops contact the guide part, and the crops flow toward the threshing chamber along the upper surface of the guide part, and the guide part rarely causes resistance to the flow of the crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 It is a left side view showing the whole of the full-feed combine harvester.

[0081] Figure 2 It is a longitudinal sectional side view of the threshing device provided with the tiller part in the first state.

[0082] Figure 3 It is the front view of the threshing unit.

[0083] Figure 4 It is a side view which shows the rear part of a conveyance device and the front part of a threshing cylinder.

[0084] Figure 5 It is a front view showing the front end portion of the spiral blade.

[0085] Figure 6 It is a longitudinal sectional side view showing the plowing part and the supporting member in the first state.

[0086] Figure 7 It is a side view which shows the front part of the threshing cylinder provided with the tilling part in the second state.

[0087] Figure 8 It is a longitudinal sectional side view showing the plowing part and the supporting member in the second state.

[0088] Fig. 9 It is a left side view showing the whole of the full-feed combine harvester.

[0089] Fig.10 It is a longitudinal sectional side view of the threshing device.

[0090] Fig.11 It is the front view of the threshing unit.

[0091] Fig.12 It is a side view which shows the rear part of a conveyance device and the front part of a threshing cylinder.

[0092] Fig.13 It is a front view showing the front end portion of the spiral blade.

[0093] Fig.14 It is a left side view showing the whole of the full-feed combine harvester.

[0094] Fig.15 It is a longitudinal sectional side view of the threshing device.

[0095] Fig.16 It is the front view of the threshing unit.

[0096] Fig.17 It is a side view which shows the rear part of a conveyance device and the front part of a threshing cylinder.

[0097] Fig.18 It is a front view showing the front end portion of the spiral blade.

[0098] Fig.19 It is a side view of a combine harvester.

[0099] Fig. 20 It is a longitudinal sectional side view of the rear part of a threshing device and a conveying device.

[0100] Fig.21 It is a longitudinal sectional side view of the front part of the threshing device and the rear part of the conveying device.

[0101] Fig. 22 It is a schematic plan view showing a transmission system of the conveyor device.

[0102] Fig.23 It is a three-dimensional diagram of the conveying component.

[0103] Fig.24 It is a longitudinal sectional front view of the conveying component.

[0104] Fig.25 It is a longitudinal sectional side view of the conveying component.

[0105] Fig.26 It is a longitudinal sectional front view of the conveying shell of the conveying device.

[0106] Fig. 27 It is a front view near the entrance of the threshing device.

[0107] Fig.28 This is a front view of a support frame arranged at the right and left parts of the front part of the threshing device.

[0108] Fig.29 It is a longitudinal sectional side view of the support portion.

[0109] Fig.30 It is a longitudinal sectional side view of the support portion.

[0110] Fig.31 It is a front view near the guide part.

[0111] Fig.32 It is a three-dimensional diagram of the guide part.

[0112] Fig.33 It is a longitudinal sectional side view of the front part of the threshing device and the rear part of the conveying device in the state where the attachment height of the conveying device to the threshing device is set to a high position.

[0113] Fig.34 It is a longitudinal sectional side view of the front part of a threshing device and the rear part of a conveying device in 1st other embodiment of the invention.

[0114] Description of Reference Numerals

[0115] <First aspect>

[0116] 8 Harvesting Department

[0117] 9Conveying device

[0118] 10Threshing device

[0119] 20Threshing room

[0120] 21 Threshing cylinder

[0121] 22 Threshing cylinder support shaft

[0122] 25 sieve

[0123] 25a front

[0124] 30. Plowing

[0125] 31Threshing Processing Unit

[0126] 32 abutment part

[0127] 33 spiral blades

[0128] 40 threshing tooth support parts

[0129] 42 threshing teeth

[0130] 55 Shape changing mechanism

[0131] 56 Supporting parts

[0132] 56a First supporting member

[0133] 56b Second supporting member

[0134] 61 Auxiliary hoeing department

[0135] L1 front and rear length

[0136] L2 front and rear length

[0137] <Second Aspect>

[0138] 8 Harvesting Department

[0139] 9Conveying device

[0140] 10Threshing device

[0141] 20Threshing room

[0142] 21 Threshing cylinder

[0143] 25 sieve

[0144] 25a front

[0145] 30. Plowing

[0146] 31Threshing Processing Unit

[0147] 32 abutment part

[0148] 33 spiral blades

[0149] 34 Guidance Department

[0150] 40 threshing tooth support parts

[0151] 42 threshing teeth

[0152] K pitch angle

[0153] S-elevation

[0154] <Third Aspect>

[0155] 8 Harvesting Department

[0156] 9Conveying device

[0157] 10Threshing device

[0158] 20Threshing room

[0159] 21 Threshing cylinder

[0160] 25 sieve

[0161] 25a front

[0162] 25t lower end

[0163] 30. Plowing

[0164] 31Threshing Processing Unit

[0165] 32 abutment part

[0166] 32D outer diameter

[0167] 33 spiral blades

[0168] 33a Corner

[0169] 33b front end

[0170] 33t lower end

[0171] 40 threshing tooth support parts

[0172] 42 threshing teeth

[0173] H1 Standing Height

[0174] H2 Standing Height

[0175] <Fourth Aspect>

[0176] 1 Body

[0177] 4Threshing device

[0178] 6 Harvesting Department

[0179] 7Conveying device

[0180] 43 Threshing Room

[0181] 44 threshing cylinder

[0182] 48 Plowing Department

[0183] 48b spiral blade

[0184] 57 Entrance

[0185] 58 guide part

[0186] 58a Around the central part

[0187] 59 Guidance Department

[0188] 59a Upper end

[0189] 59b Guide surface

[0190] 59c upper surface

[0191] P2 front and rear axle core DETAILED DESCRIPTION

[0192] <First aspect>

[0193] Hereinafter, an embodiment as an example of the present invention will be described based on the drawings.

[0194] In the following description, the traveling machine body of a full-feed combine harvester (an example of a "harvester") will be Figure 1 The direction of the arrow F shown is set to the "front of the body", the direction of the arrow B is set to the "back of the body", the direction of the arrow U is set to the "top of the body", the direction of the arrow D is set to the "bottom of the body", the direction of the front side of the paper is set to the "left side of the body", and the direction of the back side of the paper is set to the "right side of the body".

[0195] [Full-feed combine harvester as a whole]

[0196] like Figure 1As shown, the full-feed combine harvester has a traveling body, and the traveling body has a body frame 1 formed by connecting a plurality of steel materials such as square tube materials, and a pair of left and right crawler-type traveling devices 2 arranged at the lower part of the body frame 1. A driving unit 4 and a harvesting and conveying device 6 are arranged at the front part of the traveling body (front part of the body). The driving unit 4 has a driver's seat 3. An engine 5 is arranged below the driver's seat 3. The harvesting and conveying device 6 has a harvesting unit 8 and a conveying device 9. The harvesting unit 8 is arranged at the front part of the harvesting and conveying device 6, and the rice, wheat, buckwheat and other crops planted in the field are harvested and harvested using a clipper-type harvesting device 7. The conveying device 9 is arranged at the rear part of the harvesting and conveying device 6, and the harvested stalks harvested by the harvesting unit 8 are conveyed to a specified part of the traveling body. A threshing device 10 and a grain box 11 are provided at the rear of the traveling machine body. The threshing device 10 receives the cut grain stalks conveyed by the conveying device 9 and performs threshing, and performs screening of the threshed product after threshing. The grain box 11 recovers and stores the grains obtained by the threshing device 10. A grain discharge device 12 for discharging grains from the grain box 11 is connected to the rear of the grain box 11.

[0197] [Conveying device structure]

[0198] like Figure 1 , 2 As shown, the conveying device 9 includes a conveying housing 13 extending from the rear of the harvesting unit 8 to the front of the threshing unit 10. An endless rotating belt 14 is provided inside the conveying housing 13, and the endless rotating belt 14 is rotatably arranged across the lower part of the conveying housing and the upper part of the conveying housing. A plurality of locations along the length direction of the endless rotating belt 14 are provided with a locking conveying portion 14a. Figure 2 , 4 As shown, a rotating member 15 is provided at a position corresponding to the conveying terminal portion of the conveying device 9 inside the conveying housing 13, and the rotating member 15 has an axis core 15a extending in the direction along the lateral width direction of the threshing chamber 20 of the threshing device 10. Figure 4As shown, the shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 25t of the threshing cylinder side circumference of the screen 25 provided in the threshing device 10. In the present embodiment, the rod-shaped member is provided on the screen 25, and the rod-shaped member is located below the threshing cylinder 21 in a state of being formed into an arc shape along the circumference of the threshing cylinder 21. The lower end 25t of the threshing cylinder side circumference is the lower end of the part of the rod-shaped member that is located at the lowest position when viewed from the front and rear direction of the threshing cylinder. The shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 33t of the spiral blade 33 of the threshing cylinder 21. The rotating member 15 throws the cut grain stalks from the annular rotating belt-shaped body 14 into the front part of the threshing chamber 20. Specifically, the rotating member 15 is provided with a throwing blade 15b in a state of covering the entire width of the conveying path of the conveying device 9. Three throwing blades 15b are arranged along the circumference of the rotating member 15. The rotating member 15 uses the throwing blade 15b to throw the cut grain stalks from the endless rotating belt 14 from the bottom of the spiral blade 33 toward the spiral blade 33. In the present embodiment, the rotating member 15 is arranged at a position above the conveying terminal portion of the endless rotating belt 14, but it is not limited to this, and a structure supported by a rotating support shaft of a wheel body 16 on which the conveying terminal portion of the endless rotating belt 14 is wound can also be adopted.

[0199] In the conveying device 9, the rotating member 15 is driven by the power from the engine 5 to rotate with the shaft core 15a as the center of rotation in the direction of the arrow Z (see Figure 4 ) is driven in the direction of rotation shown. The wheel body 16 on the conveying terminal side around which the circular rotating belt-shaped body 14 is wound is driven by power transmitted from the rotating component 15 through an endless belt (not shown), and the circular rotating belt-shaped body 14 is driven by the wheel body 16. The entire stalk of the harvested grain stalk from the harvesting section 8, from the stem root to the ear tip, is conveyed inside the conveying shell 13 by the locking conveying of the locking conveying section 14a of the circular rotating belt-shaped body 14. The cut grain stalk conveyed by the circular rotating belt-shaped body 14 is handed over by the rotating component 15, and is thrown from the bottom of the spiral blade 33 toward the threshing section 30 by the throwing blade 15b of the rotating component 15 and is put into the threshing chamber 20 of the threshing device 10.

[0200] 〔Structure of threshing device〕

[0201] When explaining the threshing device 10 and the threshing cylinder 21, the processing start end side [grain stem input side ( Figure 2 The left side of the paper)] is set to "front", and the processing terminal side of the threshing device 10 and the threshing cylinder 21 [the grain stem discharge side ( Figure 2 on the right side of the paper)] is set to "Back".

[0202] like Figure 2As shown, the threshing device 10 includes: a threshing section 10A provided at the upper portion of the threshing device 10, and a screening section 10B provided below a threshing chamber 20 of the threshing section 10A. In the threshing device 10, the threshing processing direction of the threshing section 10A is consistent with the front-rear direction of the traveling machine body, and the upstream side of the threshing processing direction is set to be located at the front side of the traveling machine body.

[0203] like Figure 2 As shown, the threshing section 10A includes a threshing chamber 20 formed at the upper portion of the threshing device 10. A threshing drum 21 is provided in the threshing chamber 20. The threshing drum 21 rotates clockwise (clockwise) with the threshing drum support shaft 22 as the rotation center when viewed from the front. Figure 3 The threshing chamber 20 is driven to rotate (in the direction indicated by the arrow X). A supply port 23 is formed at the front lower portion of the threshing chamber 20, through which cut grain stalks can be put into the threshing chamber 20. A dust discharge port 24 is formed at the rear lower portion of the threshing chamber 20, through which threshing processed materials such as threshing stalks and broken grass can be discharged to the outside of the threshing chamber. A screen 25 is provided around the lower portion of the threshing cylinder 21 (the area below the threshing cylinder 21 in the surroundings of the threshing cylinder 21). The screen 25 is configured to be concave.

[0204] The threshing chamber 20 is formed by a front support wall 26 and a rear support wall 27 supporting the threshing cylinder 21, a top plate 28 disposed above the threshing cylinder 21, and a screen 25. A plurality of dust delivery valves 29 are arranged along the front-rear direction of the threshing chamber 20 on the inner side of the top plate 28. Figure 2 As shown, the threshing drum 21 includes a threshing part 30 provided at the front of the threshing drum 21 and a threshing processing part 31 provided at the rear side of the threshing part 30 in the threshing drum 21. The threshing processing part 31 is continuous with the rear part of the threshing part 30.

[0205] In the threshing section 10A, the whole stalks of the cut grain stalks from the stem root to the ear tip, which are put into the front part of the threshing chamber 20 through the supply port 23 by the rotating part 15 of the conveying device 9, are pushed into the rear part of the threshing cylinder 21 by the threshing section 30 as threshing processed materials, and threshing is performed by the threshing processing section 31 and the screen 25. The threshing processed materials subjected to the threshing process are applied with rotational force by the rotating threshing processing section 31 and hit the dust sending valve 29, and are guided by the dust sending valve 29 to flow toward the rear of the threshing chamber 20. The threshing processed materials are threshed while being transferred to the rear of the threshing chamber 20 by the threshing processing section 31. The grains obtained by the threshing process leak from the screen 25. The threshing processed materials such as threshed stalks and cut straw produced by the threshing process are discharged from the dust discharge port 24 to the outside of the threshing chamber 20.

[0206] 〔Structure of threshing cylinder〕

[0207] like Figure 2As shown, the threshing cylinder 21 is arranged in the threshing chamber 20 in a posture along the front-rear direction of the threshing chamber 20. The threshing cylinder 21 includes: a threshing cylinder support shaft 22 that is rotationally driven with the threshing cylinder axis core P as the rotation center, a threshing section 30 supported on the front of the threshing cylinder support shaft 22, and a threshing processing section 31 supported on the threshing cylinder support shaft 22 in a continuous state with the rear of the threshing cylinder 30.

[0208] 〔Structure of the hoeing section〕

[0209] like Figure 2 , 4 As shown in FIG. 2 , the hoe section 30 includes a base section 32 supported at the front of the barrel support shaft 22, and a spiral blade 33 rising from the outer peripheral portion of the base section 32 toward the barrel radially outward. Figure 2 , 4 As shown, the base part 32 is formed into a front-side tapered shape with a smaller diameter as it approaches the front end of the threshing cylinder. The base part 32 is formed of a plate member formed into a front-side tapered cylindrical shape centered on the threshing cylinder axis P. The spiral blade 33 is arranged in a parallel state with four roots, forming a quadruple spiral blade.

[0210] like Figure 3 , 5 As shown, the spiral blade 33 is configured such that a corner 33a of the front end of the spiral blade 33 opposite to the base portion side is angular. The spiral blade 33 is configured such that a front end portion 33b of the spiral blade 33 bulges toward the outer side in the radial direction of the barrel.

[0211] like Figure 2 , 4 As shown, the front portion 25a of the screen 25 extends to just below the rear portion of the reel 30, and the rear portion of the reel 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction. Preferably, the front portion 25a of the screen 25 extends to just below the front-to-back middle portion of the reel 30, and the front-to-back middle portion of the reel 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction.

[0212] like Figure 3 , 4 As shown in FIG. 1 , a guide portion 34 for guiding the harvested grain stems from the supply port 23 to the reed portion 30 is provided below the reed portion 30. The guide portion 34 is provided in a state of being inclined forward and downward.

[0213] In the rice-pulling section 30, the base section 32 is driven by the threshing cylinder support shaft 22, and the quadruple spiral blade 33 is driven to rotate with the threshing cylinder axis core P as the rotation center. The whole stalk of the cut rice stalk from the stem root to the ear tip, which is put into the front of the threshing chamber 20 through the supply port 23 by the rotating member 15 of the conveying device 9, is pushed into the rear of the threshing cylinder 21 along the guide section 34 by the rotating spiral blade 33. The cutting of the rice stalk by the rotating member 15 is carried out from the bottom of the spiral blade 33 toward the spiral blade 33. The cutting of the rice stalk is guided by the guide section 34 toward the rice-pulling section 30. Due to the angularity of the corner 33a of the spiral blade 33, the harvested rice stalk is easily hooked on the front end of the spiral blade 33. The cutting rice stalk hooked on the front end of the spiral blade 33 is difficult to detach from the spiral blade 33 due to the bulge of the front end portion 33b of the spiral blade 33. Thus, the cutting of the rice stalk is reliably pushed into the rear of the threshing cylinder 21 by the spiral blade 33.

[0214] [Structure of threshing processing unit]

[0215] like Figure 2 , 4 As shown, the threshing processing unit 31 is provided with a plurality of threshing tooth support members 40, and the plurality of threshing tooth support members 40 are supported on the threshing cylinder support shaft 22 in a state of being arranged at intervals in the circumferential direction of the threshing cylinder 21. In the present embodiment, six threshing tooth support members 40 are provided. Each threshing tooth support member 40 is composed of a rod-shaped member along the direction of the threshing cylinder axis P. The threshing cylinder support shaft 22 supports the threshing tooth support member 40 by connecting the threshing cylinder support shaft 22 and the threshing tooth support member 40 with a circular plate member 41 at multiple locations in the axial direction of the threshing cylinder support shaft 22. On the threshing tooth support member 40 as the outer peripheral portion of the threshing processing unit 31 of the threshing cylinder 21, threshing teeth 42 are erected toward the radially outer side of the threshing cylinder. The threshing teeth 42 are erected from multiple locations of the threshing tooth support member 40 in the axial direction of the threshing cylinder. The threshing teeth 42 are composed of a rod-shaped member. The threshing processing part 31 is comprised in the shape of a cage.

[0216] In the threshing processing section 31, the threshed material flows between the inside and outside of the threshing cylinder 21 through the threshing tooth support parts 40, and is subjected to the threshing action generated by the threshing teeth 42 and the screen 25, and is subjected to the threshing action generated by the impact of the threshing tooth support parts 40, thereby performing the threshing process.

[0217] In the present embodiment, the threshing tooth support member 40 is made of round steel. In addition to round steel, the threshing tooth support member 40 can also be made of various rod-shaped members such as round steel, square bar steel, and square tube steel. In the present embodiment, each threshing tooth 42 is made of round steel. In addition to round steel, the threshing tooth 42 can also be made of various rod-shaped members such as square bar steel, round tube, and various tubes.

[0218] 〔Structure of the screening unit〕

[0219] like Figure 2 As shown, the screening section 10B includes: a swing screening device 45 provided below the screen 25 in a swingable manner, a cleaning fan 46 provided below the front of the swing screening device 45, and a primary processed material recovery section 47 and a secondary processed material recovery section 48 provided below the swing screening device 45 behind the cleaning fan 46. In the present embodiment, the primary processed material recovery section 47 and the secondary processed material recovery section 48 are composed of a conveying auger extending in the lateral width direction of the threshing device 10.

[0220] In the screening section 10B, the processed material leaking from the screen 25 falls and is received by the swing screening device 45. The received processed material is transported to the rear by the swing screening device 45 while being shaken, and is cleaned by the cleaning air supplied from the front lower part of the swing screening device 45 to the rear of the swing screening device 45 by the cleaning air blower 46. Clean grains as the primary processed material obtained by the cleaning process flow down to the primary processed material recovery section 47 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the primary processed material recovery section 47. Unprocessed grains as the secondary processed material obtained by the cleaning process flow down to the secondary processed material recovery section 48 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the secondary processed material recovery section 48. Cleaning dust such as cut straw scraps as the tertiary processed material generated by the cleaning process is discharged to the rear of the threshing device 10 from the dust discharge port 49 provided at the rear of the threshing device 10 together with the cleaning air.

[0221] The clean grains conveyed by the primary processed material recovery unit 47 are supplied to the grain tank 11 through the winnowing device 50 connected to the primary processed material recovery unit 47. The unprocessed grains conveyed by the secondary processed material recovery unit 48 are restored to the starting end of the swing screening device 45 by the restoration device 51 connected to the secondary processed material recovery unit 48.

[0222] Regardless of the nature or state of the harvested material, the shape of the hoe part 30 is changed by the shape changing mechanism 55 so that the harvested material can be smoothly and non-damagedly fed into the threshing processing part 31 by the hoe part 30 .

[0223] Specifically, if Figure 2 , 4 As shown in , 6, 7, and 8, the shape changing mechanism 55 includes a first base portion 32a, a second base portion 32b having a front-to-back length L2 that is shorter than the front-to-back length L1 of the first base portion 32a, and a supporting member 56, and is configured to change the shape of the plowing portion 30 between a first state and a second state in which the front-to-back length is shorter than the first state.

[0224] like Figure 2 , 4 As shown in FIG. 6 , if the first base portion 32a is fitted to the threshing cylinder support shaft 22 from the front, the rear end of the first base portion 32a is connected to the front end of the threshing processing portion 31, and the threshing portion 30 is in the first state. Figure 6 As shown, the connection of the rear end of the first base part 32a to the front end of the threshing processing part 31 is performed by the flange part 57 provided at the rear end of the first base part 32a being detachably connected to the circular plate member 41 provided at the front end of the threshing processing part 31 by the connecting bolt 58. The connection of the flange part 57 to the circular plate member 41 is performed by fastening together with the second support member 56b installed between the flange part 57 and the circular plate member 41.

[0225] like Figure 4 As shown, if the shape of the reel 30 is changed to the first state, the front portion 25 a of the screen 25 is located directly below the rear portion of the reel 30 , and the front portion 25 a of the screen 25 overlaps the rear portion of the reel 30 in the front-rear direction.

[0226] In the first state of the rice-pushing section 30, the first base section 32a is driven to rotate by the threshing cylinder support shaft 22 via the first front support section 59 and the circular plate member 41. The quadruple spiral blade 33 is driven to rotate with the threshing cylinder axis P as the rotation center. The cut rice stalks (threshed material) put into the front of the threshing chamber 20 are pushed toward the rear of the threshing cylinder 21 by the quadruple spiral blade 33, and are pushed into the threshing processing section 31 while the rear of the rice-pushing section 30 is threshed by the spiral blade 33 and the front part 25a of the screen 25.

[0227] like Figure 7 , 8 As shown, if the second base portion 32b is externally fitted to the threshing cylinder support shaft 22 from the front, the second front support portion 65 provided at the front portion of the second base portion 32b is supported by the threshing cylinder support shaft 22, the rear end portion of the second base portion 32b is connected to the outer periphery of the support member 56, and the rear end portion of the second base portion 32b is supported by the threshing cylinder support shaft 22 via the support member 56, then the hoe portion 30 is in the second state. The connection of the rear end portion of the second base portion 32b to the support member 56 is performed by connecting the flange portion 60 provided at the rear end portion of the second base portion 32b to the support member 56 in a detachable manner using a connecting bolt 68.

[0228] like Figure 7 , 8As shown, when the shape of the reed section 30 is changed to the second state, the auxiliary threshing processing section 61 is provided between the reed section 30 in the second state and the threshing processing section 31. The auxiliary threshing processing section 61 is configured such that the total front-to-back length obtained by adding the front-to-back length of the auxiliary threshing processing section 61 to the front-to-back length of the reed section 30 in the second state is equal to the front-to-back length of the reed section 30 in the first state. The front-to-back length of the entire threshing cylinder when the shape of the reed section 30 is changed to the second state and the auxiliary threshing processing section 61 is installed is the same as the front-to-back length of the entire threshing cylinder when the shape of the reed section 30 is changed to the first state.

[0229] like Figure 7 , 8 As shown, the auxiliary threshing processing unit 61 includes a plurality of auxiliary threshing tooth support members 62, which are supported on the threshing cylinder support shaft 22 in a state of being arranged at intervals in the circumferential direction of the threshing cylinder 21. The auxiliary threshing teeth 64 are protruded toward the radial outside of the threshing cylinder from a plurality of positions of each auxiliary threshing tooth support member 62 in the threshing cylinder axis direction. Figure 8 As shown, the auxiliary threshing processing unit 61 supports the threshing drum support shaft 22 in the following manner: the front end portion of the auxiliary threshing tooth support component 62 is connected to the support component 56 in a detachable manner by a connecting bolt 68, and the rear end portion of the auxiliary threshing tooth support component 62 is connected to the circular plate component 41 in a detachable manner by a connecting bolt 63.

[0230] In the present embodiment, the auxiliary threshing tooth support parts 62 are provided with the same number as the threshing tooth support parts 40 of the threshing processing part 31, but it is not limited thereto. It is also possible to provide auxiliary threshing tooth support parts 62 whose number is less than the threshing tooth support parts 40 or whose number is greater than the threshing tooth support parts 40. In the present embodiment, the auxiliary threshing tooth support parts 62 and the threshing tooth support parts 40 are arranged in a straight line, but the auxiliary threshing tooth support parts 62 and the threshing tooth support parts 40 may also be offset in the circumferential direction of the threshing cylinder. In the present embodiment, the auxiliary threshing tooth support parts 62 are made of round tube steel. In addition to round tube steel, the auxiliary threshing tooth support parts 62 may also be made of various rod-shaped parts such as round steel, square bar steel, and square tube steel. In the present embodiment, the auxiliary threshing teeth 64 are made of round steel. In addition to round steel, the auxiliary threshing teeth 64 may also be made of various rod-shaped parts such as square bar steel, round tube, and various tubes.

[0231] like Figure 7 , 8 As shown, when the shape of the hoe part 30 is changed to the second state, the auxiliary threshing processing part 61 becomes a use state that can be detachably arranged between the hoe part 30 and the threshing processing part 31 in the second state, as shown in FIG. Figure 4 , 6As shown, when the shape of the hoe part 30 is changed to the first state, the auxiliary threshing processing unit 61 is not arranged between the hoe part 30 and the threshing processing unit 31 in the first state and becomes a non-use state. If the auxiliary threshing processing unit 61 is in the use state, the front portion 25a of the screen 25 is located directly below the auxiliary threshing processing unit 61, and the auxiliary threshing processing unit 61 overlaps with the front portion 25a of the screen 25 in the front-to-back direction.

[0232] In the second state of the threshing section 30, the second base section 32b is driven to rotate by the threshing cylinder support shaft 22 via the second front support section 65 and the support member 56. The double helical blade 33 is driven to rotate around the threshing cylinder axis P as the rotation center. The cut grain stalks (threshed material) put into the front of the threshing chamber 20 are pushed toward the auxiliary threshing processing section 61 by the double helical blade 33.

[0233] like Figure 6 , Figure 8 As shown, the support member 56 includes a first support member 56a supported by the threshing cylinder support shaft 22, and a second support member 56b that can be loaded and unloaded relative to the first support member 56a. The first support member 56a is welded to the threshing cylinder support shaft 22. A through hole 66 for inserting the threshing cylinder support shaft 22 is provided in the center portion of the second support member 56b. The inner diameter of the second support member 56b is smaller than the outer diameter of the first support member 56a, and the outer diameter of the second support member 56b is larger than the outer diameter of the first support member 56a. Figure 8 As shown, the second support member 56b is detachably connected to the first support member 56a by pressing the second support member 56b against the rear surface side of the first support member 56a from the rear, and using the connecting bolt 67 to tighten the portion of the second support member 56b that overlaps with the first support member 56a to connect it to the first support member 56a.

[0234] In the support member 56, as Figure 6 , 8 As shown, by removing the second support member 56b from the first support member 56a, the diameter is changed to the first support member state, and the state is located inside the middle part of the base portion (first base portion 32a) in the front-rear direction of the paddle portion 30 in the first state. Figure 6 As shown, the second support member 56b removed from the first support member 56a is separated rearward with respect to the first support member 56a, and can be supported and stored in the front end portion of the threshing processing part 31 in a state of being externally fitted on the barrel support shaft 22.

[0235] In the support member 56, as Figure 8As shown, the second supporting member 56b is connected to the first supporting member 56a, so that the diameter is changed to a second supporting member state in which the outer diameter is larger than the outer diameter in the first supporting member state, and the second supporting member 56b is connected to the rear end portion of the base portion (second base portion 32b) of the rice-moving portion 30 in the second state and the threshing barrel support shaft 22, so that the rear end portion of the base portion (second base portion 32b) is supported on the threshing barrel support shaft 22.

[0236] [Other implementation methods]

[0237] (1) In the above-mentioned embodiment, the threshing processing unit 31 adopts the example of the rod-shaped threshing cylinder 21 configured as a cage, but it is not limited to this. For example, the threshing processing unit 31 may also adopt a drum-shaped threshing cylinder configured as a cylindrical shape. In addition, in the case of a rod-shaped threshing cylinder, it is not limited to having 6 threshing tooth support members 40, for example, it may also have 5 or less and 7 or more threshing tooth support members.

[0238] (2) In the above embodiment, an example is shown in which six processing gear support members 40 and six auxiliary processing gear support members 62 are provided, but the present invention is not limited thereto. Five or less or seven or more processing gear support members 40 and auxiliary processing gear support members 62 may be provided. In addition, the number of processing gear support members 40 and the number of auxiliary processing gear support members 62 may be different.

[0239] (3) In the above embodiment, the front portion 25a of the screen 25 extends to directly below the rear portion of the reel 30 in the first state. However, the present invention is not limited thereto and the screen 25 may extend only to directly below the rear end of the reel 30 in the first state.

[0240] (4) In the above embodiment, the base portion 32 is configured to be tapered at the front, but the base portion 32 may be configured to have a constant outer diameter over the front and rear ends.

[0241] (5) In the above embodiment, the example in which the reel 30 in the first state has four spiral blades 33 and the reel 30 in the second state has two spiral blades 33 is shown, but the present invention is not limited thereto. The reel 30 in the first state may have three or fewer spiral blades 33 and the reel 30 in the second state may have one spiral blade 33. In addition, the reel 30 in the first state and the reel 30 in the second state may have the same number of spiral blades 33.

[0242] (6) In the above embodiment, an example of using a support member 56 that can be separated into a first support member 56a and a second support member 56b is shown, but it is not limited to this. For example, the second support member can be supported on the first support member 56a in a manner that can slide and retract along the radial direction of the threshing cylinder, and the support member 56 switches between the first support member state and the second support member state by the extension and retraction of the second support member. In addition, a single support member can also be used, and the support member is configured as follows: when the shape of the threshing portion 30 is changed to the second state, the threshing portion 30 is installed on the threshing cylinder support shaft 22 to support the second base portion 32b, and when the shape of the threshing portion 30 is changed to the first state, the threshing portion 30 is removed from the threshing cylinder support shaft 22.

[0243] [Industrial Applicability]

[0244] The present invention can be applied to a combine harvester that harvests rice, wheat, buckwheat, etc., as well as a harvester that harvests various crops such as corn.

[0245] <Second Aspect>

[0246] Hereinafter, an embodiment as an example of the present invention will be described based on the drawings.

[0247] In the following description, the traveling machine body of a full-feed combine harvester (an example of a "harvester") will be Fig. 9 The direction of the arrow F shown is set to the "front of the body", the direction of the arrow B is set to the "back of the body", the direction of the arrow U is set to the "top of the body", the direction of the arrow D is set to the "bottom of the body", the direction of the front side of the paper is set to the "left side of the body", and the direction of the back side of the paper is set to the "right side of the body".

[0248] [Full-feed combine harvester as a whole]

[0249] like Fig. 9As shown, the full-feed combine harvester has a traveling body, and the traveling body has a body frame 1 formed by connecting a plurality of steel materials such as square tube materials, and a pair of left and right crawler-type traveling devices 2 arranged at the lower part of the body frame 1. A driving unit 4 and a harvesting and conveying device 6 are arranged at the front part of the traveling body (front part of the body). The driving unit 4 has a driver's seat 3. An engine 5 is arranged below the driver's seat 3. The harvesting and conveying device 6 has a harvesting unit 8 and a conveying device 9. The harvesting unit 8 is arranged at the front part of the harvesting and conveying device 6, and the rice, wheat, buckwheat and other crops planted in the field are harvested and harvested using a clipper-type harvesting device 7. The conveying device 9 is arranged at the rear part of the harvesting and conveying device 6, and the harvested stalks harvested by the harvesting unit 8 are conveyed to a specified part of the traveling body. A threshing device 10 and a grain box 11 are provided at the rear of the traveling machine body. The threshing device 10 receives the cut grain stalks conveyed by the conveying device 9 and performs threshing, and performs screening of the threshed product after threshing. The grain box 11 recovers and stores the grains obtained by the threshing device 10. A grain discharge device 12 for discharging grains from the grain box 11 is connected to the rear of the grain box 11.

[0250] [Conveying device structure]

[0251] like Fig. 9 , 2 As shown, the conveying device 9 includes a conveying housing 13 extending from the rear of the harvesting unit 8 to the front of the threshing unit 10. An endless rotating belt 14 is provided inside the conveying housing 13, and the endless rotating belt 14 is rotatably arranged across the lower part of the conveying housing and the upper part of the conveying housing. A plurality of locations along the length direction of the endless rotating belt 14 are provided with a locking conveying portion 14a. Fig.10 , 4 As shown, a rotating member 15 is provided at a position corresponding to the conveying terminal portion of the conveying device 9 inside the conveying housing 13, and the rotating member 15 has an axis core 15a extending in the direction along the lateral width direction of the threshing chamber 20 of the threshing device 10. Fig.12As shown, the shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 25t of the threshing cylinder side circumference of the screen 25 provided in the threshing device 10. In the present embodiment, the rod-shaped member is provided on the screen 25, and the rod-shaped member is located below the threshing cylinder 21 in a state of being formed into an arc shape along the circumference of the threshing cylinder 21. The lower end 25t of the threshing cylinder side circumference is the lower end of the part of the rod-shaped member that is located at the lowest position when viewed from the front and rear direction of the threshing cylinder. The shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 33t of the spiral blade 33 of the threshing cylinder 21. The rotating member 15 throws the cut grain stalks from the annular rotating belt-shaped body 14 into the front part of the threshing chamber 20. Specifically, the rotating member 15 is provided with a throwing blade 15b in a state of covering the entire width of the conveying path of the conveying device 9. Three throwing blades 15b are arranged along the circumference of the rotating member 15. The rotating member 15 uses the throwing blade 15b to throw the cut grain stalks from the endless rotating belt 14 from the bottom of the spiral blade 33 toward the spiral blade 33. In the present embodiment, the rotating member 15 is arranged at a position above the conveying terminal portion of the endless rotating belt 14, but it is not limited to this, and a structure supported by a rotating support shaft of a wheel body 16 on which the conveying terminal portion of the endless rotating belt 14 is wound can also be adopted.

[0252] In the conveying device 9, the rotating member 15 is driven by the power from the engine 5 to rotate with the shaft core 15a as the center of rotation in the direction of the arrow Z (see Fig.12 ) is driven in the direction of rotation shown. The wheel body 16 on the conveying terminal side around which the circular rotating belt-shaped body 14 is wound is driven by power transmitted from the rotating component 15 through an endless belt (not shown), and the circular rotating belt-shaped body 14 is driven by the wheel body 16. The entire stalk of the harvested grain stalk from the harvesting section 8, from the stem root to the ear tip, is conveyed inside the conveying shell 13 by the locking conveying of the locking conveying section 14a of the circular rotating belt-shaped body 14. The cut grain stalk conveyed by the circular rotating belt-shaped body 14 is handed over by the rotating component 15, and is thrown from the bottom of the spiral blade 33 toward the threshing section 30 by the throwing blade 15b of the rotating component 15 and is put into the threshing chamber 20 of the threshing device 10.

[0253] 〔Structure of threshing device〕

[0254] When explaining the threshing device 10 and the threshing cylinder 21, the processing start end side [grain stem input side ( Fig.10 The left side of the paper)] is set to "front", and the processing terminal side of the threshing device 10 and the threshing cylinder 21 [the grain stem discharge side ( Fig.10 on the right side of the paper)] is set to "Back".

[0255] like Fig.10As shown, the threshing device 10 includes: a threshing section 10A provided at the upper portion of the threshing device 10, and a screening section 10B provided below a threshing chamber 20 of the threshing section 10A. In the threshing device 10, the threshing processing direction of the threshing section 10A is consistent with the front-rear direction of the traveling machine body, and the upstream side of the threshing processing direction is set to be located at the front side of the traveling machine body.

[0256] like Fig.10 As shown, the threshing section 10A includes a threshing chamber 20 formed at the upper portion of the threshing device 10. A threshing drum 21 is provided in the threshing chamber 20. The threshing drum 21 rotates clockwise (clockwise) with the threshing drum support shaft 22 as the rotation center when viewed from the front. Fig.11 The threshing chamber 20 is driven to rotate (in the direction indicated by the arrow X). A supply port 23 is formed at the front lower portion of the threshing chamber 20, through which cut grain stalks can be put into the threshing chamber 20. A dust discharge port 24 is formed at the rear lower portion of the threshing chamber 20, through which threshing processed materials such as threshing stalks and broken grass can be discharged to the outside of the threshing chamber. A screen 25 is provided around the lower portion of the threshing cylinder 21 (the area below the threshing cylinder 21 in the surroundings of the threshing cylinder 21). The screen 25 is configured to be concave.

[0257] The threshing chamber 20 is formed by a front support wall 26 and a rear support wall 27 supporting the threshing cylinder 21, a top plate 28 disposed above the threshing cylinder 21, and a screen 25. A plurality of dust delivery valves 29 are arranged along the front-rear direction of the threshing chamber 20 on the inner side of the top plate 28. Fig.10 As shown, the threshing drum 21 includes a threshing part 30 provided at the front of the threshing drum 21 and a threshing processing part 31 provided at the rear side of the threshing part 30 in the threshing drum 21. The threshing processing part 31 is continuous with the rear part of the threshing part 30.

[0258] In the threshing section 10A, the whole stalks of the cut grain stalks from the stem root to the ear tip, which are put into the front part of the threshing chamber 20 through the supply port 23 by the rotating part 15 of the conveying device 9, are pushed into the rear part of the threshing cylinder 21 by the threshing section 30 as threshing processed materials, and threshing is performed by the threshing processing section 31 and the screen 25. The threshing processed materials subjected to the threshing process are applied with rotational force by the rotating threshing processing section 31 and hit the dust sending valve 29, and are guided by the dust sending valve 29 to flow toward the rear of the threshing chamber 20. The threshing processed materials are threshed while being transferred to the rear of the threshing chamber 20 by the threshing processing section 31. The grains obtained by the threshing process leak from the screen 25. The threshing processed materials such as threshed stalks and cut straw produced by the threshing process are discharged from the dust discharge port 24 to the outside of the threshing chamber 20.

[0259] 〔Structure of threshing cylinder〕

[0260] like Fig.10As shown, the threshing cylinder 21 is arranged in the threshing chamber 20 in a posture along the front-rear direction of the threshing chamber 20. The threshing cylinder 21 includes: a threshing cylinder support shaft 22 that is rotationally driven with the threshing cylinder axis core P as the rotation center, a threshing section 30 supported on the front of the threshing cylinder support shaft 22, and a threshing processing section 31 supported on the threshing cylinder support shaft 22 in a continuous state with the rear of the threshing cylinder 30.

[0261] 〔Structure of the hoeing section〕

[0262] like Fig.10 , 4 As shown in FIG. 2 , the hoe section 30 includes a base section 32 supported at the front of the barrel support shaft 22, and a spiral blade 33 rising from the outer peripheral portion of the base section 32 toward the barrel radially outward. Fig.10 , 4 As shown, the base part 32 is formed into a front-side tapered shape with a smaller diameter as it approaches the front end of the threshing cylinder. The base part 32 is formed of a plate member formed into a front-side tapered cylindrical shape centered on the threshing cylinder axis P. The spiral blade 33 is arranged in a parallel state with four roots, forming a quadruple spiral blade.

[0263] like Fig.11 , 5 As shown, the spiral blade 33 is configured such that a corner 33a of the front end of the spiral blade 33 opposite to the base portion side is angular. The spiral blade 33 is configured such that a front end portion 33b of the spiral blade 33 bulges toward the outer side in the radial direction of the barrel.

[0264] like Fig.10 , 4 As shown, the front portion 25a of the screen 25 extends to just below the rear portion of the reel portion 30, and the rear portion of the reel portion 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction. Specifically, the front portion 25a of the screen 25 extends to just below the front-to-back middle portion of the reel portion 30, and the front-to-back middle portion of the reel portion 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction.

[0265] like Fig.11 , 4 As shown in FIG. 1 , a guide portion 34 is provided below the reed section 30 to guide the harvested grain stalks from the supply port 23 to the reed section 30. The guide portion 34 is provided in a state of being inclined downward and forward. Fig.12 As shown, the guide portion 34 is configured so that the depression angle K of the guide portion 34 is larger than the elevation angle S at the lower end of the base portion 32 .

[0266] In the rice-pulling section 30, the base section 32 is driven by the threshing cylinder support shaft 22, and the quadruple spiral blade 33 is driven to rotate with the threshing cylinder axis core P as the rotation center. The whole stalk of the cut rice stalk from the stem root to the ear tip, which is put into the front of the threshing chamber 20 through the supply port 23 by the rotating member 15 of the conveying device 9, is pushed into the rear of the threshing cylinder 21 along the guide section 34 by the rotating spiral blade 33. The cutting of the rice stalk by the rotating member 15 is carried out from the bottom of the spiral blade 33 toward the spiral blade 33. The cutting of the rice stalk is guided by the guide section 34 toward the rice-pulling section 30. Due to the angularity of the corner 33a of the spiral blade 33, the harvested rice stalk is easily hooked on the front end of the spiral blade 33. The cutting rice stalk hooked on the front end of the spiral blade 33 is difficult to detach from the spiral blade 33 due to the bulge of the front end portion 33b of the spiral blade 33. Thus, the cutting of the rice stalk is reliably pushed into the rear of the threshing cylinder 21 by the spiral blade 33.

[0267] [Structure of threshing processing unit]

[0268] like Fig.10 , 4 As shown, the threshing processing unit 31 is provided with a plurality of threshing tooth support members 40, and the plurality of threshing tooth support members 40 are supported on the threshing cylinder support shaft 22 in a state of being arranged at intervals in the circumferential direction of the threshing cylinder 21. In the present embodiment, six threshing tooth support members 40 are provided. Each threshing tooth support member 40 is composed of a rod-shaped member along the direction of the threshing cylinder axis P. The threshing cylinder support shaft 22 supports the threshing tooth support member 40 by connecting the threshing cylinder support shaft 22 and the threshing tooth support member 40 with a circular plate member 41 at multiple locations in the axial direction of the threshing cylinder support shaft 22. On the threshing tooth support member 40 as the outer peripheral portion of the threshing processing unit 31 of the threshing cylinder 21, threshing teeth 42 are erected toward the radially outer side of the threshing cylinder. The threshing teeth 42 are erected from multiple locations of the threshing tooth support member 40 in the axial direction of the threshing cylinder. The threshing teeth 42 are composed of a rod-shaped member. The threshing processing part 31 is comprised in the shape of a cage.

[0269] In the threshing processing section 31, the threshed material flows between the inside and outside of the threshing cylinder 21 through the threshing tooth support parts 40, and is subjected to the threshing action generated by the threshing teeth 42 and the screen 25, and is subjected to the threshing action generated by the impact of the threshing tooth support parts 40, thereby performing the threshing process.

[0270] In the present embodiment, the threshing tooth support member 40 is made of round steel. In addition to round steel, the threshing tooth support member 40 can also be made of various rod-shaped members such as round steel, square bar steel, and square tube steel. In the present embodiment, each threshing tooth 42 is made of round steel. In addition to round steel, the threshing tooth 42 can also be made of various rod-shaped members such as square bar steel, round tube, and various tubes.

[0271] 〔Structure of the screening unit〕

[0272] like Fig.10 As shown, the screening section 10B includes: a swing screening device 45 provided below the screen 25 in a swingable manner, a cleaning fan 46 provided below the front of the swing screening device 45, and a primary processed material recovery section 47 and a secondary processed material recovery section 48 provided below the swing screening device 45 behind the cleaning fan 46. In the present embodiment, the primary processed material recovery section 47 and the secondary processed material recovery section 48 are composed of a conveying auger extending in the lateral width direction of the threshing device 10.

[0273] In the screening section 10B, the processed material leaking from the screen 25 falls and is received by the swing screening device 45. The received processed material is transported to the rear by the swing screening device 45 while being shaken, and is cleaned by the cleaning air supplied from the front lower part of the swing screening device 45 to the rear of the swing screening device 45 by the cleaning air blower 46. Clean grains as the primary processed material obtained by the cleaning process flow down to the primary processed material recovery section 47 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the primary processed material recovery section 47. Unprocessed grains as the secondary processed material obtained by the cleaning process flow down to the secondary processed material recovery section 48 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the secondary processed material recovery section 48. Cleaning dust such as cut straw scraps as the tertiary processed material generated by the cleaning process is discharged to the rear of the threshing device 10 from the dust discharge port 49 provided at the rear of the threshing device 10 together with the cleaning air.

[0274] The clean grains conveyed by the primary processed material recovery unit 47 are supplied to the grain tank 11 through the winnowing device 50 connected to the primary processed material recovery unit 47. The unprocessed grains conveyed by the secondary processed material recovery unit 48 are restored to the starting end of the swing screening device 45 by the restoration device 51 connected to the secondary processed material recovery unit 48.

[0275] [Other implementation methods]

[0276] (1) In the above-mentioned embodiment, the threshing processing unit 31 adopts the example of the rod-shaped threshing cylinder 21 configured as a cage, but it is not limited to this. For example, the threshing processing unit 31 may also adopt a drum-shaped threshing cylinder configured as a cylindrical shape. In addition, in the case of a rod-shaped threshing cylinder, it is not limited to having 6 threshing tooth support members 40, for example, it may also have 5 or less and 7 or more threshing tooth support members.

[0277] (2) In the above embodiment, the base portion 32 is configured to be tapered at the front, but the outer diameter may be constant from the front end to the rear end of the reel portion 30 .

[0278] (3) In the above embodiment, the depression angle K of the guide portion 34 is larger than the elevation angle S of the base portion 32, but the present invention is not limited thereto. For example, the depression angle of the guide portion 34 may be smaller than the elevation angle of the base portion 32, or the depression angle of the guide portion 34 and the elevation angle of the base portion 32 may be the same.

[0279] (4) In the above embodiment, an example is shown in which four spiral blades 33 are provided, but the invention is not limited thereto. For example, three or less spiral blades or five or more spiral blades may be provided.

[0280] [Industrial Applicability]

[0281] The present invention can be applied to a combine harvester that harvests rice, wheat, buckwheat, etc., as well as a harvester that harvests various crops such as corn.

[0282] <Third Aspect>

[0283] Hereinafter, an embodiment as an example of the present invention will be described based on the drawings.

[0284] In the following description, the traveling machine body of a full-feed combine harvester (an example of a "harvester") will be Fig.14 The direction of the arrow F shown is set to the "front of the body", the direction of the arrow B is set to the "back of the body", the direction of the arrow U is set to the "top of the body", the direction of the arrow D is set to the "bottom of the body", the direction of the front side of the paper is set to the "left side of the body", and the direction of the back side of the paper is set to the "right side of the body".

[0285] [Full-feed combine harvester as a whole]

[0286] like Fig.14As shown, the full-feed combine harvester has a traveling body, and the traveling body has a body frame 1 formed by connecting a plurality of steel materials such as square tube materials, and a pair of left and right crawler-type traveling devices 2 arranged at the lower part of the body frame 1. A driving unit 4 and a harvesting and conveying device 6 are arranged at the front part of the traveling body (front part of the body). The driving unit 4 has a driver's seat 3. An engine 5 is arranged below the driver's seat 3. The harvesting and conveying device 6 has a harvesting unit 8 and a conveying device 9. The harvesting unit 8 is arranged at the front part of the harvesting and conveying device 6, and the rice, wheat, buckwheat and other crops planted in the field are harvested and harvested using a clipper-type harvesting device 7. The conveying device 9 is arranged at the rear part of the harvesting and conveying device 6, and the harvested stalks harvested by the harvesting unit 8 are conveyed to a specified part of the traveling body. A threshing device 10 and a grain box 11 are provided at the rear of the traveling machine body. The threshing device 10 receives the cut grain stalks conveyed by the conveying device 9 and performs threshing, and performs screening of the threshed product after threshing. The grain box 11 recovers and stores the grains obtained by the threshing device 10. A grain discharge device 12 for discharging grains from the grain box 11 is connected to the rear of the grain box 11.

[0287] [Conveying device structure]

[0288] like Fig.14 , 2 As shown, the conveying device 9 includes a conveying housing 13 extending from the rear of the harvesting unit 8 to the front of the threshing unit 10. An endless rotating belt 14 is provided inside the conveying housing 13, and the endless rotating belt 14 is rotatably arranged across the lower part of the conveying housing and the upper part of the conveying housing. A plurality of locations along the length direction of the endless rotating belt 14 are provided with a locking conveying portion 14a. Fig.15 , 4 As shown, a rotating member 15 is provided at a position corresponding to the conveying terminal portion of the conveying device 9 inside the conveying housing 13, and the rotating member 15 has an axis core 15a extending in the direction along the lateral width direction of the threshing chamber 20 of the threshing device 10. Fig.17As shown, the shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 25t of the threshing cylinder side circumference of the screen 25 provided in the threshing device 10. In the present embodiment, the rod-shaped member is provided on the screen 25, and the rod-shaped member is located below the threshing cylinder 21 in a state of being formed into an arc shape along the circumference of the threshing cylinder 21. The lower end 25t of the threshing cylinder side circumference is the lower end of the part of the rod-shaped member that is located at the lowest position when viewed from the front and rear direction of the threshing cylinder. The shaft core 15a of the rotating member 15 is arranged at a position lower than the lower end 33t of the spiral blade 33 of the threshing cylinder 21. The rotating member 15 throws the cut grain stalks from the annular rotating belt-shaped body 14 into the front part of the threshing chamber 20. Specifically, the rotating member 15 is provided with a throwing blade 15b in a state of covering the entire width of the conveying path of the conveying device 9. Three throwing blades 15b are arranged along the circumference of the rotating member 15. The rotating member 15 uses the throwing blade 15b to throw the cut grain stalks from the endless rotating belt 14 from the bottom of the spiral blade 33 toward the spiral blade 33. In the present embodiment, the rotating member 15 is arranged at a position above the conveying terminal portion of the endless rotating belt 14, but it is not limited to this, and a structure supported by a rotating support shaft of a wheel body 16 on which the conveying terminal portion of the endless rotating belt 14 is wound can also be adopted.

[0289] In the conveying device 9, the rotating member 15 is driven by the power from the engine 5 to rotate with the shaft core 15a as the center of rotation in the direction of the arrow Z (see Fig.17 ) is driven in the direction of rotation shown. The wheel body 16 on the conveying terminal side around which the circular rotating belt-shaped body 14 is wound is driven by power transmitted from the rotating component 15 through an endless belt (not shown), and the circular rotating belt-shaped body 14 is driven by the wheel body 16. The entire stalk of the harvested grain stalk from the harvesting section 8, from the stem root to the ear tip, is conveyed inside the conveying shell 13 by the locking conveying of the locking conveying section 14a of the circular rotating belt-shaped body 14. The cut grain stalk conveyed by the circular rotating belt-shaped body 14 is handed over by the rotating component 15, and is thrown from the bottom of the spiral blade 33 toward the threshing section 30 by the throwing blade 15b of the rotating component 15 and is put into the threshing chamber 20 of the threshing device 10.

[0290] 〔Structure of threshing device〕

[0291] When explaining the threshing device 10 and the threshing cylinder 21, the processing start end side [grain stem input side ( Fig.15 The left side of the paper)] is set to "front", and the processing terminal side of the threshing device 10 and the threshing cylinder 21 [the grain stem discharge side ( Fig.15 on the right side of the paper)] is set to "Back".

[0292] like Fig.15As shown, the threshing device 10 includes: a threshing section 10A provided at the upper portion of the threshing device 10, and a screening section 10B provided below a threshing chamber 20 of the threshing section 10A. In the threshing device 10, the threshing processing direction of the threshing section 10A is consistent with the front-rear direction of the traveling machine body, and the upstream side of the threshing processing direction is set to be located at the front side of the traveling machine body.

[0293] like Fig.15 As shown, the threshing section 10A includes a threshing chamber 20 formed at the upper portion of the threshing device 10. A threshing drum 21 is provided in the threshing chamber 20. The threshing drum 21 rotates clockwise (clockwise) with the threshing drum support shaft 22 as the rotation center when viewed from the front. Fig.16 The threshing chamber 20 is driven to rotate (in the direction indicated by the arrow X). A supply port 23 is formed at the front lower portion of the threshing chamber 20, through which cut grain stalks can be put into the threshing chamber 20. A dust discharge port 24 is formed at the rear lower portion of the threshing chamber 20, through which threshing processed materials such as threshing stalks and broken grass can be discharged to the outside of the threshing chamber. A screen 25 is provided around the lower portion of the threshing cylinder 21 (the area below the threshing cylinder 21 in the surroundings of the threshing cylinder 21). The screen 25 is configured to be concave.

[0294] The threshing chamber 20 is formed by a front support wall 26 and a rear support wall 27 supporting the threshing cylinder 21, a top plate 28 disposed above the threshing cylinder 21, and a screen 25. A plurality of dust delivery valves 29 are arranged along the front-rear direction of the threshing chamber 20 on the inner side of the top plate 28. Fig.15 As shown, the threshing drum 21 includes a threshing part 30 provided at the front of the threshing drum 21 and a threshing processing part 31 provided at the rear side of the threshing part 30 in the threshing drum 21. The threshing processing part 31 is continuous with the rear part of the threshing part 30.

[0295] In the threshing section 10A, the whole stalks of the cut grain stalks from the stem root to the ear tip, which are put into the front part of the threshing chamber 20 through the supply port 23 by the rotating part 15 of the conveying device 9, are pushed into the rear part of the threshing cylinder 21 by the threshing section 30 as threshing processed materials, and threshing is performed by the threshing processing section 31 and the screen 25. The threshing processed materials subjected to the threshing process are applied with rotational force by the rotating threshing processing section 31 and hit the dust sending valve 29, and are guided by the dust sending valve 29 to flow toward the rear of the threshing chamber 20. The threshing processed materials are threshed while being transferred to the rear of the threshing chamber 20 by the threshing processing section 31. The grains obtained by the threshing process leak from the screen 25. The threshing processed materials such as threshed stalks and cut straw produced by the threshing process are discharged from the dust discharge port 24 to the outside of the threshing chamber 20.

[0296] 〔Structure of threshing cylinder〕

[0297] like Fig.15As shown, the threshing cylinder 21 is arranged in the threshing chamber 20 in a posture along the front-rear direction of the threshing chamber 20. The threshing cylinder 21 includes: a threshing cylinder support shaft 22 that is rotationally driven with the threshing cylinder axis core P as the rotation center, a threshing section 30 supported on the front of the threshing cylinder support shaft 22, and a threshing processing section 31 supported on the threshing cylinder support shaft 22 in a continuous state with the rear of the threshing cylinder 30.

[0298] 〔Structure of the hoeing section〕

[0299] like Fig.15 , 4 As shown in FIG. 2 , the hoe section 30 includes a base section 32 supported at the front of the barrel support shaft 22, and a spiral blade 33 rising from the outer peripheral portion of the base section 32 toward the barrel radially outward. Fig.15 , 4 As shown, the base part 32 is configured in a cylindrical shape with an outer diameter 32D being constant from the front end to the rear end of the hoe part 30 and centered on the barrel axis P. The spiral blades 33 are arranged in four parallel states, and form a quadruple spiral blade.

[0300] like Fig.16 , 5 As shown, the spiral blade 33 is configured such that a corner 33a of the front end of the spiral blade 33 on the side opposite to the base portion side is angular. The spiral blade 33 is configured such that a height H1 of a front end portion 33b of the spiral blade 33 from the base portion 32 is higher than a height H2 of a portion 33c other than the front end portion of the spiral blade 33 from the base portion 32.

[0301] like Fig.15 , 4 As shown, the front portion 25a of the screen 25 extends to just below the rear portion of the reel 30, and the rear portion of the reel 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction. Preferably, the front portion 25a of the screen 25 extends to just below the front-to-back middle portion of the reel 30, and the front-to-back middle portion of the reel 30 overlaps with the front portion 25a of the screen 25 in the front-to-back direction.

[0302] like Fig.16 , 4 As shown in FIG. 1 , a guide portion 34 for guiding the harvested grain stems from the supply port 23 to the reed portion 30 is provided below the reed portion 30. The guide portion 34 is provided in a state of being inclined forward and downward.

[0303] In the rice-pulling section 30, the base section 32 is driven by the threshing cylinder support shaft 22, and the quadruple spiral blade 33 is driven to rotate with the threshing cylinder axis P as the rotation center. The whole stalk of the cut rice stalk from the stem root to the ear tip, which is put into the front of the threshing chamber 20 through the supply port 23 by the rotating member 15 of the conveying device 9, is pushed into the rear of the threshing cylinder 21 along the guide section 34 by the rotating spiral blade 33. The cutting of the rice stalk by the rotating member 15 is carried out from the bottom of the spiral blade 33 toward the spiral blade 33. The cutting of the rice stalk is guided by the guide section 34 toward the rice-pulling section 30. Due to the angularity of the corner 33a of the spiral blade 33, the harvested rice stalk is easily hooked on the front end of the spiral blade 33. The cutting of the rice stalk hooked on the front end of the spiral blade 33 is difficult to detach from the spiral blade 33 due to the high standing height of the front end 33b of the spiral blade 33. Thereby, the cut grain stems are reliably pushed in toward the rear part of the threshing cylinder 21 by the spiral blade 33.

[0304] [Structure of threshing processing unit]

[0305] like Fig.15 , 4 As shown, the threshing processing unit 31 is provided with a plurality of threshing tooth support members 40, and the plurality of threshing tooth support members 40 are supported on the threshing cylinder support shaft 22 in a state of being arranged at intervals in the circumferential direction of the threshing cylinder 21. In the present embodiment, six threshing tooth support members 40 are provided. Each threshing tooth support member 40 is composed of a rod-shaped member along the direction of the threshing cylinder axis P. The threshing cylinder support shaft 22 supports the threshing tooth support member 40 by connecting the threshing cylinder support shaft 22 and the threshing tooth support member 40 with a circular plate member 41 at multiple locations in the axial direction of the threshing cylinder support shaft 22. On the threshing tooth support member 40 as the outer peripheral portion of the threshing processing unit 31 of the threshing cylinder 21, threshing teeth 42 are erected toward the radially outer side of the threshing cylinder. The threshing teeth 42 are erected from multiple locations of the threshing tooth support member 40 in the axial direction of the threshing cylinder. The threshing teeth 42 are composed of a rod-shaped member. The threshing processing part 31 is comprised in the shape of a cage.

[0306] In the threshing processing section 31, the threshed material flows between the inside and outside of the threshing cylinder 21 through the threshing tooth support parts 40, and is subjected to the threshing action generated by the threshing teeth 42 and the screen 25, and is subjected to the threshing action generated by the impact of the threshing tooth support parts 40, thereby performing the threshing process.

[0307] In the present embodiment, the threshing tooth support member 40 is made of round steel. In addition to round steel, the threshing tooth support member 40 can also be made of various rod-shaped members such as round steel, square bar steel, and square tube steel. In the present embodiment, each threshing tooth 42 is made of round steel. In addition to round steel, the threshing tooth 42 can also be made of various rod-shaped members such as square bar steel, round tube, and various tubes.

[0308] 〔Structure of the screening unit〕

[0309] like Fig.15 As shown, the screening section 10B includes: a swing screening device 45 provided below the screen 25 in a swingable manner, a cleaning fan 46 provided below the front of the swing screening device 45, and a primary processed material recovery section 47 and a secondary processed material recovery section 48 provided below the swing screening device 45 behind the cleaning fan 46. In the present embodiment, the primary processed material recovery section 47 and the secondary processed material recovery section 48 are composed of a conveying auger extending in the lateral width direction of the threshing device 10.

[0310] In the screening section 10B, the processed material leaking from the screen 25 falls and is received by the swing screening device 45. The received processed material is transported to the rear by the swing screening device 45 while being shaken, and is cleaned by the cleaning air supplied from the front lower part of the swing screening device 45 to the rear of the swing screening device 45 by the cleaning air blower 46. Clean grains as the primary processed material obtained by the cleaning process flow down to the primary processed material recovery section 47 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the primary processed material recovery section 47. Unprocessed grains as the secondary processed material obtained by the cleaning process flow down to the secondary processed material recovery section 48 and are recovered, and are transported to the lateral outer side of the grain box side of the threshing device 10 through the secondary processed material recovery section 48. Cleaning dust such as cut straw scraps as the tertiary processed material generated by the cleaning process is discharged to the rear of the threshing device 10 from the dust discharge port 49 provided at the rear of the threshing device 10 together with the cleaning air.

[0311] The clean grains conveyed by the primary processed material recovery unit 47 are supplied to the grain tank 11 through the winnowing device 50 connected to the primary processed material recovery unit 47. The unprocessed grains conveyed by the secondary processed material recovery unit 48 are restored to the starting end of the swing screening device 45 by the restoration device 51 connected to the secondary processed material recovery unit 48.

[0312] [Other implementation methods]

[0313] (1) In the above-mentioned embodiment, the threshing processing unit 31 adopts the example of the rod-shaped threshing cylinder 21 configured as a cage, but it is not limited to this. For example, the threshing processing unit 31 may also adopt a drum-shaped threshing cylinder configured as a cylindrical shape. In addition, in the case of a rod-shaped threshing cylinder, it is not limited to having 6 threshing tooth support members 40, for example, it may also have 5 or less and 7 or more threshing tooth support members.

[0314] (2) In the above embodiment, an example of a spiral blade 33 is shown in which the corner 33a is angular and the rising height H1 of the tip 33b is higher than the rising height H2 of the portion other than the tip. However, a spiral blade not having these structures may also be used.

[0315] (3) In the above embodiment, the front portion 25 a of the screen 25 extends to directly below the rear portion of the reel 30 , but the present invention is not limited thereto and may not extend to directly below the reel 30 .

[0316] (4) In the above embodiment, an example is shown in which four spiral blades 33 are provided, but the invention is not limited thereto. For example, three or less spiral blades or five or more spiral blades may be provided.

[0317] [Industrial Applicability]

[0318] The present invention can be applied to a combine harvester that harvests rice, wheat, buckwheat, etc., as well as a harvester that harvests various crops such as corn.

[0319] <Fourth Aspect>

[0320] Figures 19 to 34 A full-feed combine harvester is shown as an example of a harvester. Figures 19 to 34 In the figure, F stands for the front, B stands for the back, U stands for the top, D stands for the bottom, R stands for the right, and L stands for the left.

[0321] (Overall structure of a combine harvester)

[0322] like Fig.19 As shown, the machine body 1 is supported by left and right crawler-type traveling devices 2. A driving part 3 for an operator to ride is arranged at the right part of the front part of the machine body 1. A threshing device 4 is arranged at the left part of the rear part of the machine body 1, and a grain collecting box 5 is arranged at the right part of the rear part of the machine body 1.

[0323] The harvesting unit 6 is provided at the front of the machine body 1, the conveying device 7 is connected to the rear of the harvesting unit 6 and extends obliquely upward and rearward, and the rear of the conveying device 7 is mounted on the front of the threshing device 4 in a manner that it can be raised and lowered around the axis core P1 that is the left and right axis core along the left and right directions. The lifting cylinder 8 is connected across the machine body 1 and the conveying device 7, and the harvesting unit 6 and the conveying device 7 can be supported by the lifting cylinder 8 so that they can be raised and lowered around the axis core P1.

[0324] The harvesting section 6 is provided with a reel 9, a trimmer-shaped cutting device 10, and a transverse conveying auger 11. As the machine body 1 moves forward, crops in the farmland are pulled in by the reel 9, the roots of the crops are cut off by the cutting device 10 and harvested, and the harvested crops are concentrated on the left and right central sides of the harvesting section 6 by the transverse conveying auger 11 and supplied to the conveying device 7.

[0325] The crops supplied from the harvesting section 6 to the conveying device 7 are conveyed rearward by the conveying device 7, and the whole stalks of the crops conveyed by the conveying device 7 are put into the threshing device 4. The crops are threshed in the threshing device 4, and the grains recovered by the threshing device 4 are stored in the grain box 5.

[0326] (Conveying device structure)

[0327] As shown in FIG. 1 , the transport device 7 includes a transport housing 12 , a transport mechanism 13 , and a transport member 14 as a rotating member.

[0328] like Fig. 20 , 3 As shown in FIG. 4 , the transport housing 12 is formed of a plate material in a square cylindrical shape and is provided across the harvesting section 6 and an inlet 57 of the threshing device 4 (see (the structure of the guide section) described later).

[0329] As shown in FIG8 , an opening 12c extending over the right portion 12a and the left portion 12b of the conveying case 12 is formed on the upper surface of the rear portion of the conveying case 12 (the upper surface above the conveying member 14 and the sprocket 16 described later).

[0330] A top plate member 33 is provided which is detachably mounted on the upper surface of the conveying housing 12 by bolts 34. The top plate member 33 has an opening 33a, and a cover member 33b which closes the opening 33a is detachably mounted on the top plate member 33 by nuts 64.

[0331] The top plate member 33 is installed by bolts 34 so as to cover the right portion 12a and the left portion 12b of the conveying housing 12, so that the opening 12c of the conveying housing 12 is closed by the top plate member 33. By removing the top plate member 33, the opening 12c of the conveying housing 12 is opened (the upper surface of the conveying housing 12 is opened over the right portion 12a and the left portion 12b of the conveying housing 12).

[0332] like Figure 19 to Figure 22 As shown, the conveying mechanism 13 is provided with left and right sprockets 15 at the front, left and right sprockets 16 at the rear, left and right conveying chains 17 installed along the front-to-back direction across the sprockets 15 and 16, and multiple conveying bodies 18 installed along the left-to-right direction across the left and right conveying chains 17, and are arranged inside the conveying shell 12 across the front end and the rear end of the conveying shell 12.

[0333] The conveying member 14 is provided inside the conveying housing 12 at a position behind the rear end (sprocket 16) of the conveying mechanism 13. As shown in Figures 5, 6, and 7, three (or more) flat blade members 19 are provided, and the outer edge 9a of the blade member 19 is slightly curved. The blade member 19 is combined in such a manner that a space 14a having a triangular cross-section along the left-right direction is formed at the center of the conveying member 14, and the blade member 19 is combined in such a manner that it extends outward from the space 14a of the conveying member 14 in the radial direction.

[0334] like Fig. 22 , 6 7, the driving shaft 20 having a hexagonal cross section is supported so as to be able to be aligned with the shaft core P1 (see Fig.19 The conveying member 14 is provided with a hub member 21 having a hexagonal opening, and the hub member 21 is mounted to the space 14a of the conveying member 14 by bolts 62.

[0335] like Fig.21 , 4 As shown in FIG. 9 , annular left and right cover members 63 are installed on the inner surfaces of the right portion 12a and the left portion 12b of the conveying housing 12. The right end and the left end of the conveying member 14 enter the inner side of the cover member 63 to prevent the crop from being wound around the portion between the right portion 12a (left portion 12b) of the conveying housing 12 and the conveying member 14 in the driving shaft 20.

[0336] By inserting the drive shaft 20 into the opening of the hub member 21, the drive shaft 20 passes through the space 14a of the conveying member 14, and the hub member 21 is installed across the outer surface of the drive shaft 20 and the blade member 19 so that the drive shaft 20 and the blade member 19 rotate integrally. Thus, the conveying member 14 is installed on the drive shaft 20, and the drive shaft 20 and the blade member 19 (conveying member 14) can rotate integrally.

[0337] (Drive structure of conveying device)

[0338] like Fig. 20 , 3 , 4, and 9, the transmission shaft 23 is supported in the left-right direction at the front part of the threshing device 4, and the power of the engine 22 (refer to 1) mounted on the machine body 1 is transmitted to the pulley 23a connected to the left part of the transmission shaft 23.

[0339] like Fig. 22 and Fig. 27As shown, a pulley 23b is connected to the left portion of the transmission shaft 23, a pulley 20a is connected to the left portion of the drive shaft 20, and a transmission belt 24 is installed across the pulley 23b of the transmission shaft 23 and the pulley 20a of the drive shaft 20. A tension pulley 25 capable of pressing and separating the transmission belt 24 is provided, and a cutting clutch 26 having the transmission belt 24 and the tension pulley 25 is provided.

[0340] A sprocket 20 b is connected to the right portion of the drive shaft 20 , a sprocket 27 a is connected to the drive shaft 27 supporting the sprocket 16 in the conveying mechanism 13 , and a transmission chain 28 as a transmission mechanism is installed across the sprocket 20 b of the drive shaft 20 and the sprocket 27 a of the drive shaft 27 .

[0341] According to the above structure, the power of the engine 22 is transmitted to the drive shaft 20 via the transmission shaft 23 and the harvesting clutch 26, and the drive shaft 20 is driven to Fig.19 , 2 , 3, the conveying member 14 is driven by the driving shaft 20 around the axis P1 to Fig.19 , 2 , 3 counterclockwise rotation drive.

[0342] The power of the drive shaft 20 is transmitted to the drive shaft 27 via the transmission chain 28, and then to the conveying mechanism 13. The conveying mechanism 13 (sprockets 15, 16, conveying chain 17 and conveying body 18) is conveyed in the front-to-back direction of the conveying housing 12. Fig.19 , 2 , 3 counterclockwise rotation drive.

[0343] The drive shaft 27 is connected with a sprocket 27b, and the power of the drive shaft 27 is transmitted from the sprocket 27b of the drive shaft 27 to the harvesting unit 6 (reel 9, cutting device 10 and transverse conveying auger 11). If the harvesting clutch 26 is operated to the disconnected state, the conveying device 7 (conveying mechanism 13 and conveying member 14) and the harvesting unit 6 (reel 9, cutting device 10 and transverse conveying auger 11) are stopped.

[0344] In this case, the sprocket 27a of the drive shaft 27 is configured to have a larger diameter than the sprocket 20b of the drive shaft 20, and the power of the drive shaft 20 is decelerated by the transmission chain 28 and transmitted to the drive shaft 27 (transport mechanism 13). As a result, the transport mechanism 13 is driven to rotate at a lower speed than the transport member 14. In other words, the transport member 14 is driven to rotate at a higher speed than the transport mechanism 13.

[0345] As mentioned above (the overall structure of the combine harvester) and Fig.19 , 2As shown in FIG. 3 , the conveying mechanism 13 is driven to rotate, so that the crops harvested by the harvesting section 6 and supplied to the conveying device 7 are conveyed rearwardly in a substantially straight line along the bottom of the conveying housing 12 from the front end to the rear.

[0346] If the crop reaches the rear end portion (sprocket 16) of the conveying mechanism 13, the crop is transferred from the conveying mechanism 13 to the conveying component 14 along the bottom portion of the conveying shell 12, and is then dropped from the outlet 7a of the conveying device 7 (the rear end portion of the conveying shell 12) to the inlet 57 of the threshing device 4 through the conveying component 14 (refer to the structure toward the guide portion described later).

[0347] (Structure of the reversing mechanism)

[0348] As described later (Structure of threshing device) and Fig. 22 , 9 As shown, the threshing device 4 is provided with a threshing drum 44 , and a bevel gear 50 a connected to a driving shaft 50 of the threshing drum 44 meshes with a bevel gear 23 c connected to the transmission shaft 23 , so that the threshing drum 44 is rotationally driven by the power of the transmission shaft 23 .

[0349] The transmission shaft 29 is supported concentrically with the transmission shaft 23 . The bevel gear 29 a connected to the transmission shaft 29 meshes with the bevel gear 50 a of the drive shaft 50 . The power of the transmission shaft 23 is transmitted to the transmission shaft 29 as reverse power via the bevel gear 50 a of the drive shaft 50 .

[0350] A pulley 29b is connected to the right part of the transmission shaft 29, a pulley 20c is connected to the right part of the drive shaft 20, and a transmission belt 30 is installed across the pulley 29b of the transmission shaft 29 and the pulley 20c of the drive shaft 20. A tension pulley 31 is provided that can press and release the transmission belt 30, and a reverse clutch 32 is provided as a reverse mechanism having the transmission belt 30 and the tension pulley 31.

[0351] The reverse clutch 32 is normally operated to the disconnected state. When the harvesting section 6 and / or the conveying device 7 is clogged with crops, the harvesting clutch 26 is operated to the disconnected state, and the reverse clutch 32 is temporarily operated to the transmission state.

[0352] If the reverse clutch 32 is operated to the transmission state, the reverse power of the transmission shaft 29 is transmitted to the drive shaft 20 via the reverse clutch 32, the conveying mechanism 13 and the conveying member 14 of the conveying device 7 are driven to rotate in the reverse direction, and the reel 9 and the transverse conveying auger 11 of the harvesting section 6 are driven to rotate in the reverse direction. Thus, the crop blockage of the harvesting section 6 and the conveying device 7 is eliminated.

[0353] When a crop jam or the like occurs at the rear of the conveyor 7, the operator can Fig.26 By removing the top plate member 33 shown, the clogged crops can be taken out from the opening 12 c of the conveying housing 12 .

[0354] By removing the top plate member 33 when there is no clogging of crops at the rear of the conveyor device 7 , replacement work and maintenance work of the conveyor member 14 and the sprocket 16 of the conveyor mechanism 13 can be performed.

[0355] (Structure of mounting the conveying device to the threshing device)

[0356] like Fig. 27 As shown, a support frame 35 is provided in the right and left parts of the front part of the threshing device 4 in the vertical direction, and the left and right support parts 36 are connected to the support frame 35. The drive shaft 20 (refer to the above (Structure of the conveying device) (Drive structure of the conveying device) and Fig. 22 ) is supported by the right and left parts by the support part 36.

[0357] like Fig. 27 , 11 As shown in Figures 1 and 2, the support portion 36 is provided with a boss portion 36a, a connecting portion 36b, a reinforcing rib 36c, a receiving portion 36d, and an opening portion 36e. In the support portion 36, the boss portion 36a is connected to the upper and lower middle portions of the flat connecting portion 36b. The reinforcing rib 36c is connected to the boss portion 36a and the connecting portion 36b over the upper and lower portions, and the receiving portion 36d is connected to the connecting portion 36b and the lower end portion of the reinforcing rib 36c. Four opening portions 36e in the up-down direction are opened at the upper and lower portions of the connecting portion 36b.

[0358] like Fig.28 , 11 As shown in FIG. 12 , four openings 35a and four openings 35b are arranged in the vertical direction on the support frame 35, and four openings 35c are arranged on both sides of the openings 35a and 35b. Four bolts 37 are installed in the opening 35c of the support frame 35, and the bolts 37 are inserted into the opening 36e of the support portion 36.

[0359] Figure 27 to Figure 30 The state shown is a state where the bolt 37 is located at the upper end of the opening 36e of the support portion 36, the bolt 37 is tightened, and the four bolts 38 are inserted into the connecting portion 36b of the support portion 36 and the opening 35a of the support frame 35 and tightened.

[0360] exist Fig. 20 , Fig.21 , Fig. 27 In the illustrated state, the attachment height of the conveyor device 7 to the threshing device 4 is set to a low position, and the support portion 36 is connected to the support frame 35 by eight bolts 37 and 38 .

[0361] The right part (left part) of the drive shaft 20 is rotatably supported on the hub part 36a. Through the support part 36, the drive shaft 20 is supported concentrically with the axis P1, and the harvesting part 6 and the conveying device 7 are supported in a manner that can be raised and lowered around the axis P1 (drive shaft 20).

[0362] (Structure of threshing device)

[0363] like Fig. 20 as well as Fig.21 As shown, the threshing device 4 is provided with a threshing chamber 43, a threshing cylinder 44, a screen 45, a screening part 46, a cleaning fan 47, and the like.

[0364] The threshing cylinder 44 is supported in the threshing chamber 43 so as to be rotatable about the front-rear axis P2 along the front-rear direction, and a threshing section 48 is provided at the front of the threshing cylinder 44, and a threshing processing section 49 is provided at the rear of the threshing cylinder 44. Fig. 22 As shown, a drive shaft 50 is connected to the front of the threshing drum 44, and the bevel gear 50a of the drive shaft 50 is meshed with the bevel gear 23c of the transmission shaft 23. Through the power of the transmission shaft 23, the threshing drum 44 is driven to Fig. 27 The drive rotates clockwise.

[0365] like Fig. 20 and Fig.21 As shown, the hoe part 48 of the threshing cylinder 44 is provided with the conical cylindrical base part 48a centering on the axis core P2, and the spiral blade 48b is provided on the outer peripheral part of the base part 48a.

[0366] In the threshing processing part 49 of the threshing cylinder 44, a plurality of cylindrical rod members 49a are arranged in the circumferential direction around the axis core P2 and extend in the front-rear direction, and a plurality of cylindrical threshing teeth 49b are attached to the rod members 49a and extend radially outward.

[0367] According to the above structure, the whole stalks of the crop conveyed by the conveying device 7 are pulled in by the spiral blades 48 b of the threshing part 48 as the threshing cylinder 44 rotates, and are put into the threshing chamber 43 , and the crop is threshed by the threshing processing part 49 of the threshing cylinder 44 .

[0368] The screen 45 is formed into a lattice shape by elongated plates and rods, and is formed into a semi-cylindrical shape as a whole, and is arranged around the lower part of the threshing cylinder 44.

[0369] The screening unit 46 is provided below the screen 45 , and is provided with a grain pan 51 , a chaff sieve 52 , a straw sieve 53 , a grain sieve 54 , a primary processed material recovery unit 55 , and a secondary processed material recovery unit 56 .

[0370] A cleaning fan 47 is provided in front of the screening section 46, and screening air is supplied to the screening section 46 from the cleaning fan 47. In the screening section 46, the processed material from the screen 45 is screened, the grains recovered to the primary processed material recovery section 55 are transported to the grain box 5 and stored, and the processed material recovered by the secondary processed material recovery section 56 is returned to the threshing chamber 43.

[0371] (Structure of the guide section)

[0372] like Fig. 20 , Fig.21 , Fig. 27 As shown, between the left and right support frames 35, the inlet 57 of the threshing device 4 is formed in a horizontally long rectangular shape (rectangle) in a front view.

[0373] The guide portion 58 is arranged below the threshing portion 48 of the threshing drum 44 in a side view, and the guide portion 58 is arranged to extend over the rear end portion of the bottom of the conveying device 7 (conveying shell 12) (the lower edge portion 7a of the outlet 7 of the conveying device 7) (the lower edge portion 57a ​​of the inlet 57 of the threshing device 4) and the front end portion of the screen 45 in a side view.

[0374] like Fig.31 and Fig.32 As shown, the guide portion 58 is provided with a left and right central portion 58a which is triangular in top view and front view, and a right transverse portion 58b and a left transverse portion 58c which are triangular in front view and side view, and the left and right central portion 58a extends obliquely upward and rearward in side view. The upper side of the right transverse portion 58b and the upper side of the left transverse portion 58c are formed in an arc shape in a front view in a manner along the rotation trajectory of the spiral blade 48b of the reel portion 48.

[0375] (Structure of the guide section)

[0376] like Fig.31 and Fig.32 As shown, at the right corner of the guide portion 58, i.e., the connecting portion of the left and right central portions 58a and the right transverse portion 58b, a guide portion 59 is provided which is bulged toward the left and right central portions 58a of the guide portion 58. The right corner of the guide portion 58 is located on the downstream side of the rotation direction of the threshing cylinder 44 (the threshing portion 48).

[0377] The upper end portion 59a of the guide portion 59 is formed into an inclined shape in a manner along the rotation trajectory of the spiral blade 48b of the plowing portion 48 and the upper edge of the right horizontal portion 58b of the guide portion 58 in a front view, and the upper end portion 59a of the guide portion 59 is arranged close to the rotation trajectory of the spiral blade 48b of the plowing portion 48 and the upper edge of the right horizontal portion 58b of the guide portion 58.

[0378] A guide surface 59b is provided at a portion of the guide portion 59 that faces the left and right center portions 58a of the guide portion 58. The guide surface 59b is inclined relative to the axis P2 of the threshing cylinder 44 (the threshing portion 48) in a plan view, so as to guide the crops thrown in from the conveying device 7 toward the left and right center portions 58a of the guide portion 58. The upper surface portion 59c of the guide portion 59 is formed in a state of inclination that is higher toward the rear of the threshing chamber 43 in a side view.

[0379] (Structure near the entrance of the threshing device)

[0380] like Fig. 20 and Fig.21 As shown, the cleaning fan 47 (see above (Structure of the threshing device)) is arranged in front of the screening part 46 and below the guide part 58. The guide part 58 is adjacent to the cleaning fan housing 60 accommodating the cleaning fan 47 in the up-down direction.

[0381] like Fig. 27 As shown, the lateral width W3 of the outlet 7 a of the conveying device 7 connected to the inlet 57 of the threshing device 4 is set to be larger than the lateral width W4 of the threshing drum 44 .

[0382] like Fig. 20 and Fig.21 As shown, the lower end of the screen 45 and the rear end of the guide 58 are at the same height in a side view. In this case, an imaginary line A1 is expected to extend horizontally forward from the lower end of the screen 45 (the rear end of the guide 58) in a side view.

[0383] The axis P1 of the conveying member 14 of the conveying device 7 is arranged at a position lower than the imaginary line A1 when viewed from the side, and the axis P1 of the conveying member 14 of the conveying device 7 is arranged at a position lower than the screen 45 when viewed from the side. The axis P1 of the conveying member 14 of the conveying device 7 is arranged at a position lower than the rotation trajectory of the spiral blade 48b of the weeding part 48 when viewed from the side.

[0384] In a side view, a first vertical distance W1 between the imaginary line A1 and the front end of the guide portion 58 is set larger than a second vertical distance W2 between the imaginary line A1 and the lower end of the front end of the base portion 48 a of the reel 48 .

[0385] The lower end part of the rotation track of the spiral blade 48b of the hoe part 48 is arrange|positioned at the position lower than the upper end part 57b of the inlet 57 of the threshing device 4 in side view.

[0386] (Crop flow from conveyor to threshing unit)

[0387] As mentioned above (driving structure of conveying device) and Fig. 20 , Fig.21 , Fig. 22As shown, the crops harvested by the harvesting section 6 are transported rearward in a roughly straight line from the front end to the rear of the transport shell 12 along the bottom of the transport shell 12 in the transport device 7 through the transport mechanism 13, and are dropped into the inlet 57 of the threshing device 4 from the outlet 7a of the transport device 7 (the rear end of the transport shell 12) through the transport component 14, and are dropped from the inlet 57 of the threshing device 4 toward the threshing chamber 43 obliquely upward and rearward.

[0388] The crops introduced into the inlet 57 of the threshing device 4 are introduced along the guide portion 58 from below the threshing portion 48 toward the lower surface of the threshing portion 48 in a direction close to a direction perpendicular to the axis P2 of the threshing cylinder 44 in a side view.

[0389] If crops are put in as described above, they can easily enter between adjacent spiral blades 48b of the weeding part 48, and the crops are guided toward the threshing chamber 43 by the guide part 58, and are pushed backward by the rear surface of the spiral blade 48b of the weeding part 48 as the threshing drum 44 rotates, and are pushed into the threshing chamber 43.

[0390] In this case, if Fig.31 and Fig.32 As shown, it is considered that by the rotation of the threshing cylinder 44 (the hoe part 48), the crop tends to flow to the downstream side of the rotation direction of the hoe part 48 and tends to be retained at the right corner of the guide part 58. Since the right corner of the guide part 58 is far from the spiral blade 48b of the hoe part 48, it is considered that the spiral blade 48b of the hoe part 48 is difficult to reach.

[0391] Since the guide portion 59 is provided at the right corner of the guide portion 58, the portion that the spiral blade 48b of the reel portion 48 is difficult to reach is reduced, and the portion corresponding to the guide portion 59 is reduced, so that the spiral blade 48b of the reel portion 48 easily hits the crop.

[0392] When the crops are pushed into the threshing chamber 43 by the spiral blades 48b of the threshing part 48, the crops are guided by the guide surface 59b of the guide part 59 toward the left and right central parts 58a of the guide part 58, and the crops flow toward the threshing chamber 43 along the upper surface part 59c of the guide part 59, so the crops are smoothly pushed into the threshing chamber 43 by the spiral blades 48b of the threshing part 48.

[0393] (Structure of lifting mechanism)

[0394] like Fig. 27 , Fig.29 , Fig.30 As shown in FIG. 1 , left and right lifting mechanisms 42 are provided below the left and right support parts 36 described above (Structure of attaching the conveying device to the threshing device).

[0395] A support plate 39 is connected to a portion of the support frame 35 below the support portion 36 , a nut 40 is mounted on the support plate 39 , and a bolt 41 is inserted into the nut 40 .

[0396] Thus, the lifting mechanism 42 includes the support plate 39 , the nut 40 , the bolt 41 , and the like.

[0397] As described below, the attachment height of the conveyor device 7 to the threshing device 4 can be changed from a low position to a high position.

[0398] like Figure 27 to Figure 30 As shown, by removing the four bolts 38 and slightly loosening the four bolts 37 , the support portion 36 is moved upward along the support frame 35 while being maintained in a state of being inseparable from the support frame 35 .

[0399] In the above state, the bolt 41 is rotated to push the receiving portion 36d of the support portion 36 upward by the upper end of the bolt 41. When the support portion 36 is pushed upward and the bolt 37 reaches the lower end of the opening 36e of the support portion 36, the bolt 37 is tightened, and the four bolts 38 removed are inserted into the connecting portion 36b of the support portion 36 and the opening 35b of the support frame 35 and tightened.

[0400] Thus, the installation height of the conveyor 7 to the threshing device 4 is set to a high position. When the installation height of the conveyor 7 to the threshing device 4 is changed from a high position to a low position, the same operation as above can be performed, and the bolt 41 can be rotated in the opposite direction to lower the support portion 36.

[0401] As described above, the lifting mechanism 42 is provided to change the attachment height of the conveyor 7 to the threshing device 4 so that the position of the crop outlet 7a of the conveyor 7 is changed in the vertical direction relative to the crop inlet 57 of the threshing device 4.

[0402] As described in (State near the entrance of the threshing device when the installation height of the conveying device to the threshing device is set to a high position) above (Structure of the lifting mechanism), when the installation height of the conveying device 7 to the threshing device 4 is set to a high position, by attaching the lower side member 61 having a channel-shaped cross section to the lower side portion 57a ​​of the entrance 57 of the threshing device 4, the lower side member 61 can be used as the lower side portion 57a ​​of the entrance 57 of the threshing device 4. Thus, by attaching and detaching the lower side member 61, the height of the lower side portion 57a ​​of the entrance 57 of the threshing device 4 can be changed.

[0403] When the installation height of the conveying device 7 to the threshing device 4 is set to a high position, similarly, the height of the front end portion of the guide portion 58 can be changed by simply replacing the guide portion 58 with another guide portion 58.

[0404] like Fig.33 As shown, when the installation height of the conveying device 7 to the threshing device 4 is set to a high position, by installing the lower part 61 and replacing the guide part 58, the rear end of the bottom of the conveying device 7 (conveying shell 12) (the lower part of the outlet 7a of the conveying device 7), the lower part 57a of the inlet 57 of the threshing device 4 (the lower part 61) and the front end of the guide part 58 can be configured to be continuously connected with a small step difference.

[0405] Even when the attachment height of the conveyor device 7 to the threshing device 4 is set to a high position, the axis P1 of the conveyor member 14 of the conveyor device 7 is arranged at a position higher than the imaginary line A1 (see FIG. 1 ) in a side view. Fig.21 ), and the axis P1 of the conveying member 14 of the conveying device 7 is also arranged at a position lower than the screen 45 in a side view. The axis P1 of the conveying member 14 of the conveying device 7 is arranged at a position lower than the rotation trajectory of the spiral blade 48b of the weeding part 48 in a side view.

[0406] (First other embodiment of the invention)

[0407] like Fig.34 As shown, in the conveying device 7, the conveying member 14 (refer to Fig. 20 and Fig.21 ) is removed from the drive shaft 20, and the sprocket 16 of the conveying mechanism 13 is installed on the drive shaft 20. Thus, in the conveying device 7, the conveying member 14 can be removed and switched to a state in which the rear end of the conveying mechanism 13 is installed on the drive shaft 20.

[0408] In this structure, the sprocket 16 and the conveying body 18 of the conveying mechanism 13 are rotating members provided at the rear portion of the conveying device 7 .

[0409] (Second other embodiment of the invention)

[0410] In the threshing cylinder 44, the base part 48a of the tilling part 48 may be configured not in the conical cylindrical shape, but in the cylindrical shape which has the same radius in the front-back direction.

[0411] The boundary between the threshing cylinder 44, the hoeing portion 48 and the threshing processing portion 49 may also be as shown in FIG. Fig. 20 and Fig.21As shown, instead of being located further rearward (inward of the threshing chamber 43) than the front end of the screen 45 in a side view, the boundary portion between the threshing section 48 and the threshing processing section 49 can be configured at the same position as the front end of the screen 45 in a side view.

[0412] (Third other embodiment of the invention)

[0413] The guide portion 59 may be provided at the left corner of the guide portion 58 instead of the right corner of the guide portion 58 .

[0414] The guide portion 59 may be provided at both the right corner and the left corner of the guide portion 58 .

[0415] (Fourth other embodiment of the invention)

[0416] The guide portion 59 may be configured by bulging the guide portion 58 by press working, or may be configured by press working a member different from the guide portion 58 and attaching the member to the guide portion 58 .

[0417] (Fifth other embodiment of the invention)

[0418] Instead of forming the guide portion 59 by bulging the guide portion 58, the guide portion 59 may be formed by a plurality of plate materials or a plurality of rod materials.

[0419] Industrial Application Possibility

[0420] The present invention can be applied to a harvester that puts all the stalks of the harvested crops into a threshing device.

Claims

1. A harvester, characterized in that: have: a harvesting section, which is disposed at the front of the machine body and harvests crops in the field; a conveying device for conveying the crops harvested by the harvesting unit toward the rear of the machine body; and A threshing device receives the crops transported by the transport device as threshing objects and performs threshing on the received threshing objects. The threshing device comprises: a threshing chamber into which the conveying device puts crops as threshing materials; a threshing cylinder which is rotatably arranged in the threshing chamber and threshes the threshing materials put into the threshing chamber; and a screen which is arranged around the lower part of the threshing cylinder. The threshing drum comprises: a threshing section, which is arranged at the front of the threshing drum and threshes the threshed material put into the threshing chamber toward the rear of the threshing drum; and a threshing processing section, which is arranged in a continuous state with the rear of the threshing section and threshes the threshed material from the threshing section. The threshing unit comprises: a base unit; and a spiral blade which rises from the outer peripheral portion of the base unit toward the radially outer side of the threshing cylinder to push the threshed material toward the rear of the threshing cylinder. The harvester includes a shape changing mechanism that changes the shape of the hoe part. The shape changing mechanism is configured to change the shape of the farming portion between a first state and a second state in which the front-to-back length is shorter than the front-to-back length of the first state.

2. The harvester according to claim 1, characterized in that: The harvester includes an auxiliary threshing processing unit, which can be switched between a use state and a non-use state. The use state is a state in which the auxiliary threshing processing unit is set in a loadable and detachable manner between the threshing processing unit and the second state, and the non-use state is a state in which the auxiliary threshing processing unit is not set between the threshing processing unit and the first state.

3. The harvester according to claim 1 or 2, characterized in that: The base part is configured as a cylindrical shape with a front-side tapered shape having a smaller diameter toward the front end side of the threshing cylinder and centered on the axis core of the threshing cylinder. The harvester includes a support member connected to the rear end of the base portion of the hoe-pushing part in the second state and a threshing cylinder support shaft, and supports the rear end of the hoe-pushing part in the second state on the threshing cylinder support shaft. The supporting member is configured to be able to change state between a first supporting member state and a second supporting member state, wherein the first supporting member state is a state located inside the middle portion in the front-to-back direction of the base portion of the tillering portion in the first state, and the second supporting member state is a state connected to the rear end portion of the tillering portion in the second state and the threshing barrel support shaft and having an outer diameter larger than the outer diameter in the first supporting member state.

4. The harvester according to claim 3, characterized in that: The support member includes: a first support member supported by the barrel support shaft; and a second support member having an inner diameter smaller than the outer diameter of the first support member and an outer diameter larger than the outer diameter of the first support member, and being attachable and detachable relative to the first support member. By coupling the second supporting member to the first supporting member, the supporting member is in the second supporting member state, and by removing the second supporting member from the first supporting member, the supporting member is in the first supporting member state.

5. The harvester according to claim 4, characterized in that: The second support member is configured to detachably support the front end portion of the threshing processing unit when the second support member is removed from the first support member.

6. The harvester according to claim 1 or 2, characterized in that: When the shape of the reed-pushing part is changed to the first state, the front part of the screen is located directly below the rear part of the reed-pushing part. The rear portion of the reed portion overlaps with the front portion of the screen in a front-to-rear direction.

7. The harvester according to claim 1 or 2, characterized in that: The threshing processing unit is provided with: a rod-shaped threshing tooth support component, which is arranged in a state along the circumferential direction of the threshing cylinder and along the axial direction of the threshing cylinder; and a plurality of threshing teeth, which are a plurality of threshing teeth protruding from a plurality of positions of the threshing tooth support component in the axial direction of the threshing cylinder toward the radial outside of the threshing cylinder.

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