CN118159128A - Threshing cylinder - Google Patents

Abstract

The present invention relates to a threshing cylinder, at least one threshing teeth supporting component (40) of the threshing cylinder is arranged in the circumferential direction of a gathering part (30), the front end part of the threshing teeth supporting component (40) is positioned at the same position as the terminal end part of a spiral blade (33).

Description

Threshing cylinder

Technical Field

The invention relates to a threshing cylinder.

Background

As shown in patent document 1, the threshing cylinder includes: a threshing cylinder support shaft (rotation support shaft) provided so as to be rotatable in a threshing chamber into which all harvested crops are put in a posture along a front-rear direction of the threshing chamber; a gathering part which is supported by the front part of the threshing cylinder supporting shaft and gathers the input crops to the rear of the threshing chamber; and a threshing processing part which is supported by a part of the threshing cylinder support shaft at the rear side of the gathering part and performs threshing processing on the crops gathered by the gathering part. In addition, in this threshing cylinder, the inlet portion has a base portion and a helical blade provided on an outer peripheral portion of the base portion. The threshing processing unit comprises: a plurality of rod-shaped threshing teeth supporting members supported by the threshing cylinder supporting shaft while being spaced apart in the circumferential direction of the threshing processing part in a state of being along the threshing cylinder supporting shaft; and a plurality of rod-shaped threshing teeth supported by the threshing teeth support member in a state of protruding from the threshing teeth support member to the radial outside of the threshing processing part and in a state of being spaced apart in a direction along the threshing cylinder support shaft in each of the plurality of threshing teeth support member.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2019-4765 (JP 2019-004765A).

Disclosure of Invention

Problems to be solved by the invention

In the threshing cylinder, since the plurality of threshing teeth supporting members are arranged at intervals in the circumferential direction of the threshing processing part on the rear side of the gathering part, if the crop gathered into the front end part of the threshing processing part enters the gap between the threshing teeth supporting members, the threshing processing part cannot smoothly receive the crop as the threshing processed object, and the flow of the threshing processed object in the threshing processing part becomes poor.

The invention provides a threshing cylinder, which can enable a threshing processing part to smoothly receive crops gathered into the threshing processing part by a gathering part.

Means for solving the problems

The threshing cylinder of the invention comprises: a threshing cylinder support shaft which is provided in a threshing chamber for feeding the whole of the harvested crop and is rotatable in a posture along the front-rear direction of the threshing chamber; a gathering part which is supported by the front part of the threshing cylinder supporting shaft and gathers the input crops to the rear of the threshing chamber; and a threshing processing part which is supported by a part of the threshing cylinder support shaft at the rear side of the gathering part and performs threshing processing on the crops gathered by the gathering part. The gathered portion has a base portion and a helical blade provided on an outer peripheral portion of the base portion. The threshing processing unit includes: a plurality of rod-shaped threshing teeth supporting members supported by the threshing cylinder supporting shaft in a state of being spaced apart in a circumferential direction of the threshing processing part along the threshing cylinder supporting shaft; and a plurality of rod-shaped threshing teeth supported by the threshing teeth support member in a state protruding radially outward from the threshing teeth support member and spaced apart in a direction along the threshing cylinder support shaft in each of the plurality of threshing teeth support members, at least one of the threshing teeth support member being provided such that a tip end position of the threshing teeth support member in a circumferential direction of the drawn-in portion is the same as a terminal position of the helical blade.

According to this configuration, the crop separated from the screw blade by being caught by the at least one threshing teeth supporting member by the catching portion being caught by the tip portion of the threshing processing portion, and therefore the threshing processing portion can smoothly receive the crop as the threshing processed object from the catching portion.

In the present invention, it is preferable that the threshing cylinder has a plurality of the spiral blades, and one or more of the threshing teeth supporting members are disposed between the terminal end portions of the spiral blades adjacent to each other in the circumferential direction of the gather portion.

According to this configuration, since the interval between the end portions of the adjacent spiral blades in the circumferential direction of the gathering portion is not too narrow, the gathering of the respective spiral blades into the threshing portion is not tight, and the crop can be smoothly received without clogging the threshing portion.

In the present invention, it is preferable that the plurality of threshing teeth supporting members have: a first threshing tooth supporting member having a narrow interval between a threshing tooth of the plurality of threshing teeth closest to the front end of the threshing tooth supporting member and the rear end of the base portion; and a second threshing teeth supporting member, wherein the threshing teeth of the plurality of threshing teeth supporting member, which are closest to the front end side of the threshing teeth supporting member, are widely spaced from the rear end portion of the base portion, and the terminal position of the spiral blade is the same as the front end portion of the second threshing teeth supporting member in the circumferential direction of the converging portion.

The crop collected by the collecting part to the front end part of the threshing processing part is caught by the second threshing tooth supporting part, and the interval between the rear end part of the base part and the threshing teeth adjacent to the rear end part is wider than that of the first threshing tooth supporting part, so that the threshing teeth are difficult to prevent the second threshing tooth supporting part from catching the crop, and the threshing processing part can smoothly receive the crop from the collecting part.

In the present invention, it is preferable that the threshing cylinder has a plurality of the spiral blades, and the positions of the terminal ends of all the spiral blades are the same as the positions of the tip ends of the threshing teeth supporting member in the circumferential direction of the gather portion.

According to this configuration, the crop that is separated from all the helical blades by being gathered by the gathering portion to the tip portion of the threshing processing portion is caught by the threshing teeth supporting member, so that the threshing processing portion can smoothly receive the crop from the gathering portion.

Drawings

Fig. 1 is a side view showing the whole of a general type combine harvester.

Fig. 2 is a longitudinal cross-sectional side view of the threshing device.

Fig. 3 is a rear view of the threshing cylinder in a longitudinal section on the rear side of the drawn-in portion.

Fig. 4 is an expanded view of the portion where the rear part of the gathering section and the front part of the threshing processing section are located in the threshing cylinder.

Detailed Description

Hereinafter, an embodiment which is an example of the present invention will be described based on the drawings.

In the following description, the traveling machine body of the general combine is referred to as "front machine body", the direction of arrow B as "rear machine body", the direction of arrow U as "upper machine body", the direction of arrow D as "lower machine body", the direction of front side of the paper surface as "left machine body", and the direction of back side of the paper surface as "right machine body", respectively.

(Entirety of common combine harvester)

As shown in fig. 1, a general combine harvester includes: a body frame 1 formed by connecting a plurality of steel materials such as square pipes; a traveling machine body having a pair of left and right crawler traveling devices 2 provided at a lower portion of a machine body frame 1. A driving section 4 and a harvest conveyor 6 are provided in the front part of the traveling machine body (the machine body front part). The driver section 4 has a driver seat 3. The harvest transport device 6 has: a harvesting unit 8 provided in front of the harvesting conveyor 6, for harvesting and harvesting stalks of rice, wheat, buckwheat, etc. planted in the farmland as crops by the pusher-type harvesting device 7; and a conveying device 9 provided at the rear of the harvesting conveying device 6 for conveying the harvested stalks harvested by the harvesting unit 8 to a predetermined position of the traveling machine body. A threshing device 10 and a grain tank 11 are provided at the rear part of the travelling machine body (rear part of the machine body), the threshing device 10 receives the harvested stalks conveyed by the conveying device 9 to perform threshing treatment and sorts the threshed objects (crops), and the grain tank 11 recovers grains obtained by the threshing device 10 and stores the grains. The threshing device 10 and the grain tank 11 are arranged in a laterally aligned state. A grain discharge device 12 for discharging grains from the grain tank 11 is connected to the rear portion of the grain tank 11.

(Structure of conveying device)

As shown in fig. 1 and 2, the conveyor 9 has a conveyor box 13 from the rear of the harvesting unit 8 to the front of the threshing device 10. Inside the transport box 13, there is provided an endless rotary belt 14 rotatably provided over a lower portion inside the transport box and an upper portion inside the transport box. The endless rotary belt 14 has locking conveying portions 14a at a plurality of positions in the longitudinal direction.

In the conveyor 9, the locking conveyor 14a is conveyed by the endless rotary belt 14, and the harvested stalks from the harvesting unit 8 are locked and conveyed by the locking conveyor 14a in the conveyor box 13, and are thrown into the collecting section 30 provided at the front portion of the threshing cylinder 21.

(Structure of threshing device)

In the description of the threshing device 10 and the threshing cylinder 21, the processing start end side (the side of the grain stalk input (left side of the drawing in fig. 2)) of the threshing device 10 and the threshing cylinder 21 is referred to as "front", and the processing end side (the side of the grain stalk discharge (right side of the drawing in fig. 2)) of the threshing device 10 and the threshing cylinder 21 is referred to as "rear".

As shown in fig. 2, the threshing device 10 includes: a threshing unit 10A, wherein the threshing unit 10A is arranged at the upper part of the threshing device 10; and a sorting section 10B, the sorting section 10B being provided below the threshing chamber 20 in the threshing section 10A. In the threshing device 10, the threshing direction in the threshing unit 10A is set to coincide with the front-rear direction of the traveling machine body, and the upstream side in the threshing direction is located on the front side of the traveling machine body.

As shown in fig. 2, the threshing unit 10A has a threshing chamber 20 formed in an upper portion of the threshing device 10. A threshing cylinder 21 is provided in the threshing chamber 20. The threshing cylinder 21 is driven to rotate in a clockwise direction (the direction of rotation of the threshing cylinder indicated by an arrow X in fig. 3) when viewed from the front, with the threshing cylinder support shaft 22 as the rotation center. A supply port 23 through which harvesting stalks can be put into the threshing chamber 20 is formed at the front lower part of the threshing chamber 20. A dust discharge port 24 through which the threshed waste stalks, crushed stalks, and other threshed products can be discharged to the outside of the threshing chamber 20 is formed at the rear lower part of the threshing chamber. Around the lower part in the threshing cylinder 21 (the lower area of the threshing cylinder 21 in the periphery of the threshing cylinder 21) there is a receiving net 25. The receiving net 25 is of concave configuration.

The threshing chamber 20 is constituted by a front support wall 26 and a rear support wall 27 that support the threshing cylinder 21, a ceiling 28 provided above the threshing cylinder 21, a receiving net 25, and the like. A plurality of dust feed valves 29 arranged in the front-rear direction of the threshing chamber 20 are provided inside the top plate 28. As shown in fig. 2, the threshing cylinder 21 has: a gathering part 30, the gathering part 30 is arranged at the front part of the threshing cylinder 21, and gathers the crops as threshing processed objects to the rear of the threshing chamber 20; a threshing processing part 31, wherein the threshing processing part 31 is arranged at the rear side of the gathering part 30 in the threshing cylinder 21 to perform threshing processing of the threshing processed object. The threshing processing unit 31 is continuous with the rear portion of the gathering unit 30.

In the threshing unit 10A, the whole stalks from the root to the spike of the harvesting stalks that are fed into the front part of the threshing chamber 20 through the feed port 23 by the locking conveying unit 14a in the conveying device 9 are collected by the collecting unit 30 toward the rear part of the threshing cylinder 21 as threshing processed objects, and threshing processing is performed by the threshing processing unit 31 and the receiving net 25. The threshing object subjected to threshing is applied with a rotational force by the rotating threshing processing part 31, collides with the dust feed valve 29, and is guided by the dust feed valve 29 to flow to the rear of the threshing chamber 20. The threshing processing unit 31 performs threshing processing while conveying the threshing processed object to the rear of the threshing chamber 20. The grains obtained by the threshing treatment leak out from the receiving net 25. Threshing processed matters such as waste stalks and crushed stalks after threshing are discharged from the dust discharge port 24 to the outside of the threshing chamber 20.

(Structure of threshing cylinder)

As shown in fig. 2, the threshing cylinder 21 is provided in the threshing chamber 20 in a posture along the front-rear direction of the threshing chamber 20. The threshing cylinder 21 has: a threshing cylinder support shaft 22, the threshing cylinder support shaft 22 being provided in the processing chamber 20 in a posture along the front-rear direction of the threshing chamber 20 and being driven to rotate with the threshing cylinder axis P as a rotation center; a gathering section 30, the gathering section 30 being supported by the front portion of the threshing cylinder support shaft 22; and a threshing processing part 31, wherein the threshing processing part 31 is supported by the threshing cylinder support shaft 22 in a state of being continuous with the rear part of the gathering part 30.

(Structure of the tuck-in portion)

As shown in fig. 2, the tuck-in portion 30 includes: a base portion 32, the base portion 32 being supported by a front portion of the threshing cylinder support shaft 22; and a spiral blade 33, wherein the spiral blade 33 is erected radially outward from the outer peripheral portion of the base portion 32 toward the threshing cylinder. In the present embodiment, the base portion 32 is formed of a sheet metal member wound in a truncated cone shape, and has a tapered front side shape having a smaller diameter as it approaches the front end of the threshing cylinder 21. The front end portion of the base portion 32 is connected to the threshing cylinder support shaft 22 by a front disk member (not shown), and the rear end portion of the base portion 32 is connected to the threshing cylinder support shaft 22 by a first middle disk member 35, whereby the threshing cylinder support shaft 22 supports the base portion 32. The three spiral blades 33 are arranged in parallel, and the spiral blades 33 are triple-helical.

As shown in fig. 2, a guide portion 34 that guides the harvested stalks from the supply port 23 to the gathering portion 30 is provided below the gathering portion 30. The guide portion 34 is provided in a state inclined forward and downward.

In the scooping portion 30, the base portion 32 is driven by the threshing cylinder support shaft 22 via the front disk member and the first middle disk member 35, and the triple helical blades 33 are driven to rotate about the threshing cylinder axis P as a rotation center. The whole stalks from the root to the spike tip of the harvesting stalks, which are thrown into the front part of the threshing chamber 20 through the supply port 23 by the locking conveying part 14a of the conveying device 9, are gathered into the rear part of the threshing cylinder 21 along the guide part 34 by the rotating helical blade 33.

[ Structure of threshing processing part ]

As shown in fig. 2 and 3, the threshing processing unit 31 includes a plurality of threshing teeth supporting members 40, and the plurality of threshing teeth supporting members 40 are supported by the threshing cylinder supporting shaft 22 in a state of being arranged at intervals in the circumferential direction of the threshing cylinder 21. In the present embodiment, the threshing processing unit 31 has 6 threshing teeth supporting members 40. Each of the threshing teeth supporting members 40 is constituted by a rod-shaped member along the axis P of the threshing cylinder. The front end 40f (see fig. 4) of the threshing teeth support member 40 is supported by the first middle circular plate member 35 and connected to the threshing cylinder support shaft 22 via the first middle circular plate member 35, the rear end of the threshing teeth support member 40 is supported by the rear circular plate member 36 and connected to the threshing cylinder support shaft 22 via the rear circular plate member 36, and the threshing teeth support member 40 is supported by the second middle circular plate member 41 at a position between the front end 40f and the rear end and connected to the threshing cylinder support shaft 22 via the second middle circular plate member 41, whereby the threshing cylinder support shaft 22 supports the threshing teeth support member 40. The first middle circular plate member 35 is supported by the tip portion 40f of the threshing teeth support member 40 by being connected to the first middle circular plate member 35 by a bracket 43 provided at the tip portion 40 f. The bracket 43 is connected to the first middle circular plate member 35 by a connecting bolt. The second middle circular plate member 41 is provided at a plurality of positions in the axial direction of the threshing cylinder support shaft 22. Threshing teeth 42 are provided upright on a threshing teeth support member 40 as an outer peripheral portion of the threshing processing portion 31 of the threshing cylinder 21 toward the radially outer side of the threshing cylinder. The threshing teeth 42 are erected from a plurality of positions in the axial direction of the threshing cylinder of the threshing teeth support 40. The threshing teeth 42 are constituted by rod-shaped members. The threshing processing unit 31 is formed in a cage shape.

In the present embodiment, the threshing teeth 42 are provided in a posture along the radial direction of the threshing cylinder 21, but may be provided in a posture inclined with respect to the radial direction of the threshing cylinder 21, such as a posture having a retreating angle.

In the threshing processing unit 31, the threshing teeth support member 40 is driven by the threshing cylinder support shaft 22 via the first middle circular plate member 35, the second middle circular plate member 41, and the rear circular plate member 36, and the threshing teeth 42 are driven with the threshing cylinder axis P as the rotation center, and when the threshing processed object moves between the inside and the outside of the threshing cylinder 21 via the interval between the threshing teeth support members 40, the threshing processing object is subjected to the threshing action of the threshing teeth 42 and the receiving net 25, and is subjected to the threshing action by the striking of the threshing teeth support member 40, thereby performing the threshing processing.

That is, the threshing cylinder 21 is configured to have a cage shape in which an internal space S1 (see fig. 2) communicating with the threshing chamber 20 via a space between the threshing teeth support members 40 is formed, and a plurality of threshing teeth 42 protruding radially outward of the threshing cylinder 21 from the outer peripheral surface of the threshing cylinder 21 are provided in a state of being arranged at intervals in the circumferential direction and the treatment direction of the threshing cylinder, that is, configured to be a so-called rod-shaped threshing cylinder.

Therefore, the threshing cylinder 21 rotates around the cylinder support shaft 22 in the treatment direction, and thereby the threshing processed product (crop) from the collecting part 30 is introduced between the threshing processing part 31 and the receiving net 25. The threshing cylinder 21 performs threshing processing by the threshing processing space S2 (see fig. 2) between the threshing cylinder 21 and the receiving net 25, such as beating by the threshing teeth support 40 and the threshing teeth 42, carding by the threshing teeth 42, and the like, and allows the threshing processing object obtained by the threshing processing to enter the internal space S1, and performs threshing processing by the beating by the threshing teeth support 40 and the threshing teeth 42, carding by the threshing teeth 42, and the like, while stirring the threshing processing object in the threshing processing space S2 and the threshing processing object in the internal space S1.

In the present embodiment, the threshing teeth supporting member 40 is made of round steel. The threshing teeth supporting member 40 may be made of various rod-shaped members such as round steel, square bar steel, square tube steel, etc., in addition to round steel. In the present embodiment, each threshing tooth 42 is made of a circular steel material. The threshing teeth 42 may be formed of various bar-shaped members such as square bar steel, round tube steel, and square tube steel, in addition to round steel.

Fig. 4 is a developed view of the threshing cylinder 21 at the position of the rear part of the collecting part 30 and the front part of the threshing processing part 31. As shown in fig. 4, at least one of the threshing teeth supports 40 is provided so that the tip end position (the position of the tip end 40 f) of the threshing teeth support 40 in the circumferential direction of the drawn-in portion 30 is the same as the terminal end position (the position of the terminal end 33 r) of the helical blade 33. In the present embodiment, the positions of the end portions of all the helical blades 33 are the same as the positions of the tip portions (positions of the tip portions 40 f) of the threshing teeth supporting member 40 in the circumferential direction of the gather portion 30. The crop gathered by the gathering section 30 into the threshing section 31 is caught by the threshing tooth support 40, and the crop from the gathering section 30 is smoothly received by the threshing section 31. In the present embodiment, as shown in fig. 3, the end portion 33r of the screw blade 33 is offset downstream in the threshing cylinder rotation direction X with respect to the axial center 40c of the threshing tooth support member 40, but the rear end portion 33r of the screw blade 33 may be offset upstream in the threshing cylinder rotation direction X with respect to the axial center 40c of the threshing tooth support member 40, or the rear end portion 33r of the screw blade 33 may coincide with the axial center 40c of the threshing tooth support member 40. It is preferable that there is no gap in the longitudinal direction of the threshing cylinder between the terminal end portion 33r of the spiral blade 33 and the front end portion 40f of the threshing tooth support 40, but even if there is a small gap, it is sufficient to pass the crop from the spiral blade 33 to the threshing tooth support 40 without any obstacle.

As shown in fig. 3, the threshing teeth support 40 is provided between the terminal ends 33r of the spiral blades 33 adjacent to each other in the circumferential direction of the gather portion 30. In the present embodiment, only one threshing tooth support member 40 is provided between the end portions 33r of the adjacent spiral blades 33, but one or more threshing tooth support members 40 may be provided between the end portions 33r of the adjacent spiral blades 33. The crop is gathered from the gathering section 30 to the threshing processing section 31 in an untight state while ensuring that the intervals between the terminal ends 33r of the adjacent spiral blades 33 in the circumferential direction of the gathering section 30 are not too narrow.

As shown in fig. 2 and 4, the tooth support members 40 are configured such that the interval between adjacent teeth 42 is constant, and the arrangement pitch of the teeth 42 along the axis P of the threshing cylinder is the same in each tooth support member 40. As shown in fig. 4, the 6 tooth support members 40 include a first tooth support member 40a and a second tooth support member 40b, and the interval K between the tooth 42a closest to the front end of the tooth support member among the plurality of teeth 42 of the tooth support member 40 of the first tooth support member 40a and the second tooth support member 40b and the rear end 32r of the base portion 32 is different. The interval K of the second threshing teeth supporting member 40b is wider than the interval K of the first threshing teeth supporting member 40 a. That is, the first threshing teeth supporting member 40a is formed to have a narrow interval K, and the second threshing teeth supporting member 40b is formed to have a wide interval K. The end position 33r of the spiral blade 33 is configured to be the same as the position of the tip end portion of the second threshing tooth support 40b in the circumferential direction of the gather portion 30. The crop gathered by the gathering section 30 into the threshing processing section 31 is caught by the second threshing tooth support member 40b, and the interval K between the rear end portion 32r of the base section 32 and the threshing tooth 42a adjacent to the rear end portion is wider than that of the first threshing tooth support member 40a in the second threshing tooth support member 40b, so that the crop is received from the gathering section 30 by the threshing processing section 31 in a state where the threshing tooth 42a is difficult to interfere.

(Structure of sorting section)

As shown in fig. 2, the sorting unit 10B includes: a swing sorting device 45 provided below the receiving net 25 so as to be capable of driving a swing; the air screen 46 is provided below the swing separator 45, and the No.1 recovery unit 47 and the No.2 recovery unit 48 are provided below the swing separator 45 behind the air screen 46. In the present embodiment, the No.1 recovery unit 47 and the No.2 recovery unit 48 are configured by screw conveyors extending in the width direction of the threshing device 10.

In the sorting unit 10B, the processed objects leaked from the receiving net 25 fall down to the swing sorting device 45, are caught, and are rocked while being conveyed backward by the swing sorting device 45, and are subjected to sorting processing by the sorting wind supplied from the front-lower direction of the swing sorting device 45 to the rear of the swing sorting device 45 by the wind screen 46. The clean grain obtained by the sorting treatment as the No. 1 treated product flows down to the No. 1 recovery unit 47 and is recovered, and is transported to the outside in the lateral direction of the grain tank side of the threshing device 10 by the No. 1 recovery unit 47. Untreated grains obtained by the sorting treatment as treated grains No.2 flow down to the No.2 recovery unit 48 and are recovered, and are transported to the outside of the grain tank side of the threshing device 10 by the No.2 recovery unit 48. The separated dust such as the rod dust which is the processed object No. 3 generated by the separation processing is discharged to the rear of the threshing device 10 together with the separated wind from the dust discharge port 49 provided at the rear of the threshing device 10.

The clean grains conveyed by the No. 1 recovery unit 47 are supplied to the grain tank 11 through the grain lifting apparatus 50 connected to the No. 1 recovery unit 47. The untreated cereal grains conveyed by the No. 2 recovery unit 48 are reduced to the starting end of the swing classification device 45 by the reduction device 51 connected to the No. 2 recovery unit 48.

(Other embodiments)

(1) In the above embodiment, examples of 6 threshing teeth supporting members 40 and 3 spiral blades 33 are shown, but the present invention is not limited thereto. For example, the threshing teeth supporting member 40 may be provided with 5 or less or 7 or more, and the helical blade 33 may be provided with 2 or less or 4 or more. As a combination of the number of the threshing teeth supporting members 40 and the number of the spiral blades 33, a combination may be adopted in which the number of the spiral blades 33 is a greatest common divisor of the number of the threshing teeth supporting members 40, or a combination other than the above may be adopted.

(2) In the above embodiment, the example was shown in which the tip end positions (the positions of the tip ends 40 f) of the 3 threshing teeth supporting members 40 are the same as the terminal end positions of the helical blades 33, but this is not a limitation, and the tip end positions (the positions of the tip ends 40 f) of at least one threshing teeth supporting member 40 may be the same as the terminal end positions of the helical blades 33.

(3) In the above embodiment, the example in which only one threshing teeth supporting member 40 is provided between the terminal portions 33r of the adjacent spiral blades 33 has been shown, but the present invention is not limited to this, and two or more threshing teeth supporting members 40 may be provided between the terminal portions 33r of the adjacent spiral blades 33.

(4) In the above embodiment, the example in which the terminal end positions of all the helical blades 33 are the same as the tip end positions (the positions of the tip end portions 40 f) of the threshing teeth supporting member 40 is shown, but the present invention is not limited thereto. The terminal end position of only some of the plurality of spiral blades 33 may be the same as the tip end position (the position of the tip end 40 f) of the threshing teeth supporting member 40.

(5) Although the example having the first and second tooth support members 40a and 40b is shown, the tooth 42a closest to the front end of the tooth support member may be spaced apart from the rear end portion 32r of the base portion 32 by the same distance K in all the tooth support members 40.

(6) In the above embodiment, the base portion 32 is configured to have the tapered shape in which the outer diameter is smaller as the outer diameter is closer to the distal end side of the gathered portion 30, but the present invention is not limited thereto. The outer diameter of the base portion 32 may be constant from the front end portion to the rear end portion of the gathered portion 30.

Industrial applicability

The present invention can be applied to a threshing cylinder including a collecting portion having a base portion and a helical blade and a plurality of threshing teeth supporting members.

Description of the reference numerals

20: Threshing chamber

22: Threshing cylinder supporting shaft

30: Gathering portion

31: Threshing processing part

32: Base portion

32R: rear end portion

33: Spiral blade

33R: terminal part

40: Threshing tooth supporting component

40A: first threshing tooth supporting part

40B: second threshing tooth supporting part

42: Threshing teeth

42A: threshing teeth on front end side of threshing teeth supporting component

K: spacing of

Claims (4)

1. A threshing cylinder, wherein,

The threshing cylinder has:

A threshing cylinder supporting shaft which is arranged in a threshing chamber for throwing the whole harvested crops and can rotate along the front-back direction of the threshing chamber;

A gathering part which is supported by the front part of the threshing cylinder supporting shaft and gathers the input crops to the rear of the threshing chamber; and

A threshing processing part which is supported by a part of the threshing cylinder support shaft at the rear side of the gathering part and performs threshing processing on the crops gathered by the gathering part,

The gathering part is provided with a base part and a helical blade arranged on the periphery of the base part,

The threshing processing unit includes:

A plurality of rod-shaped threshing teeth supporting members supported by the threshing cylinder supporting shaft while being spaced apart from each other in the circumferential direction of the threshing processing part along the threshing cylinder supporting shaft; and

A plurality of rod-shaped threshing teeth, wherein each of the plurality of threshing teeth supporting members is supported by the threshing teeth supporting member in a state of protruding from the threshing teeth supporting member to the radial outside of the threshing processing part and in a state of being spaced apart along the direction of the threshing cylinder supporting shaft,

At least one of the threshing teeth supporting members is provided such that a front end portion position of the threshing teeth supporting member in a circumferential direction of the gathering portion is the same as a terminal end portion position of the helical blade.

2. Threshing cylinder according to claim 1, wherein,

The threshing cylinder is provided with a plurality of spiral blades,

More than one threshing teeth supporting component is arranged between the adjacent terminal end parts of the spiral blades in the circumferential direction of the gathering part.

3. Threshing cylinder according to claim 1 or 2, wherein,

The plurality of threshing teeth supporting members have: a first threshing tooth supporting member having a narrow interval between a threshing tooth of the plurality of threshing teeth closest to the front end of the threshing tooth supporting member and the rear end of the base portion; and a second threshing teeth supporting member having a wide interval between a threshing tooth of the plurality of threshing teeth that is closest to the front end of the threshing teeth supporting member and the rear end of the base portion,

In the circumferential direction of the gathering portion, the terminal end position of the helical blade is the same as the front end position of the second threshing teeth supporting member.

4. A threshing cylinder as claimed in any one of claims 1 to 3, wherein,

The threshing cylinder is provided with a plurality of spiral blades,

In the circumferential direction of the gathering portion, the terminal end positions of all the helical blades are the same as the tip end positions of the threshing teeth supporting member.