Threshing device of full-stalk input type combine

Abstract

To address such a problem that when a large amount of culm is fed, intake of the culm by a spiral vane is not sufficient and performance of taking over the culm to a threshing chamber is inferior.SOLUTION: A thresher of a whole culm feeding-type combine harvester is equipped with a raking part 19 at a front end of a threshing cylinder 18, the raking part for raking and conveying rearward reaped culm fed and conveyed toward the front end, with rotation of the threshing cylinder 18. The raking part 19 includes a truncated cone-shaped base 23 and a spiral vane 24 formed from a front side to a rear side on an outer peripheral surface of the base 23, where a foremost tip part of the spiral vane 24 has a surface orthogonal to a rotary shaft 18a of the threshing cylinder 18.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a threshing device for a full-stalk input type combine that takes in the cut stalks fed into the threshing chamber and performs threshing processing.

Background Art

[0002] Conventionally, in the threshing device of a full-stalk input type combine, a spiral blade for smoothly taking in the stalks fed from the feed conveyor into the threshing chamber is provided on the starting end side of the handling cylinder in the threshing chamber (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a conventional threshing device, when a large amount of stalks are fed, there is a problem that the intake of the stalks by the spiral blade is not sufficient and the transfer performance to the handling chamber is poor.

[0005] In consideration of the problems of such conventional technologies, an object of the present invention is to provide a threshing device for a full-stalk input type combine that can smoothly perform the intake and transfer of stalks even when a large amount of stalks are fed.

Means for Solving the Problems

[0006] The present invention relates to a threshing device for a full-stalk feeding type combine harvester equipped with a scraping-in part at the front end of a handling cylinder, which scrapes in and conveys the cut stalks fed and conveyed toward the front end thereof rearward as the handling cylinder rotates, wherein the scraping-in part has a frustum-shaped base and spiral blades formed on the outer peripheral surface of the base from the front to the rear, the spiral blades are composed of a spiral support plate fixed to the frustum-shaped base, a blade part detachably attached to the working surface side of the outer peripheral part of the support plate, and an auxiliary plate detachably attached to the working surface side of the support plate and the blade part, a main part of the front edge of the support plate and the front edge of the blade part are erected with a retreat angle with respect to the center line of the base in a front view, and the auxiliary plate is detachably fixed to the working surface side of the main part of the front edge of the support plate and the front edge of the blade part in a state where a part thereof protrudes in the rotation direction, a front end side, which is a protruding part of the auxiliary plate, is bent rearward, and a foremost edge of the front end side, which is the protruding part, substantially coincides with the center line of the frustum-shaped base in a front view. The threshing device is characterized by this. The first invention related to the present invention is a threshing device of a full-stalk input type combine harvester equipped with a scraping-in part at the front end of the handling cylinder, which scrapes in and conveys the harvested stalks supplied and conveyed toward the front end rearward as the handling cylinder rotates, the scraping-in part has a truncated cone-shaped base and spiral blades formed on the outer peripheral surface of the base from the front to the rear, the threshing device is characterized in that the foremost tip of the spiral blade 24 has a surface orthogonal to the rotation axis of the handling cylinder.

[0007] The second invention related to the present invention is the spiral blade is composed of a spiral support plate fixed to the base, a blade part detachably attached to the working surface side of the outer peripheral part of the support plate, and an auxiliary plate detachably attached to the working surface side of the support plate and the blade part, the main part of the front edge of the support plate and the front edge of the blade part are erected with a retreat angle with respect to the center line of the base in a front view, and the auxiliary plate is detachably fixed to the working surface side of the main part of the front edge of the support plate and the front edge of the blade part in a state where a part protrudes in the rotation direction, the front end side, which is the protruding part of the auxiliary plate, is bent backward The first invention related to the present invention, which is as described above threshing device.

[0008] The third invention related to the present invention is a threshing device of a full-stalk input type combine harvester equipped with a scraping-in part at the front end of the handling cylinder, which scrapes in and conveys the harvested stalks supplied and conveyed toward the front end rearward as the handling cylinder rotates, the scraping-in part has a truncated cone-shaped base and spiral blades formed on the outer peripheral surface of the base from the front to the rear, the threshing device of the full-stalk input type combine harvester is characterized in that a round bar is attached to the non-working surface side of the plate part at the foremost tip of the spiral blade.

[0009] The fourth invention related to the present invention is The main part of the front edge of the plate portion at the foremost tip of the spiral blade, with reference to the rotation direction, is erected with a backward angle with respect to the center line of the base in a front view, and the round bar is attached along the main part of the receding front edge. The third invention related to the present invention It is a threshing device for a full-stalk input type combine harvester.

[0010] The fifth invention related to the present invention is The main part of the front edge of the plate portion at the foremost tip of the spiral blade, with reference to the rotation direction, is erected vertically along the center line of the base in a front view, and the round bar is attached along the main part of the vertical front edge. The third invention related to the present invention It is a threshing device for a full-stalk input type combine harvester.

[0011] The sixth invention related to the present invention is The main part of the front edge of the plate portion at the foremost tip of the spiral blade, with reference to the rotation direction, is bent backward or forms an arc with respect to the center line of the base in a front view, and the round bar is attached along the main part of the bent or arcuate front edge. The third invention related to the present invention It is a threshing device for a full-stalk input type combine harvester.

Advantages of the Invention

[0012] According to the present invention, the intake performance of the straw is improved, the problem of the straw being carried around is also improved, and the transfer performance is enhanced.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0015] FIG. 1 is a front view of a full-stalk input type (hereinafter referred to as general-purpose) combine according to an embodiment of the present invention, FIG. 2 is a side view of the same combine, and FIG. 3 is a longitudinal sectional side view of the threshing device of the same combine. Hereinafter, with reference to the traveling direction of the combine, the front and rear, left and right, and up and down are defined as viewed from the operator.

[0016] As shown in FIGS. 1 and 2, a general-purpose combine that harvests crop stalks such as rice, wheat, and rapeseed standing upright in a field while self-propelling has a vehicle body 1 equipped with a pair of left and right traveling crawlers 2, 2 at the lower part. In front of the vehicle body 1, there is a raking reel 5 equipped with a raking tine 4 that rakes the crop stalks weeded by the weeding tool 3 backward, a sickle-type horizontal cutting blade device 6 that cuts the stalks after raking, and a raking auger 8 that rakes the stalks after cutting onto a table 7. The pre-harvest treatment unit 9 is composed of these components.

[0017] A feeder house 10 is equipped from the left side to the rear of this pre-harvest treatment unit 9. Inside the feeder house 10, a feed conveyor 11 is equipped that takes over the crop stalks from the pre-harvest treatment unit 9 and conveys them upward and backward to supply them into the threshing device 12 (see FIG. 3).

[0018] On the right side of the feeder house 10, a driving operation unit composed of a driver's seat 13, an operation box 14, etc. is equipped. Behind the driving operation unit, a grain tank 15 for temporarily storing the harvested product is equipped.

[0019] When the harvested product in the grain tank 15 is full, it is discharged outside the machine by operating the lifting, turning, and telescoping of the discharge auger 16.

[0020] In the threshing device 12, as shown in FIG. 3, the stalks fed from the feed conveyor 11 are taken into the handling chamber 17 through the entrance receiving plate 28' by the raking portion 19 provided on the front end side of the handling cylinder 18 and are to be threshed by the handling cylinder 18.

[0021] This handling cylinder 18 has a plurality of tooth bars 20 arranged in parallel in the axial direction of the handling cylinder and at a predetermined interval in the rotational direction, and handling teeth 21 planted on each tooth bar 20.

[0022] In addition, the processed grains leaking from the concave 22 on the lower wall of the handling chamber 17 are to be sorted by the lower sorting device 25.

[0023] [First Embodiment] As shown in FIG. 4(b) in side view, the above-mentioned scraping-in part 19 is composed of a frustum-shaped base 23 that is narrower at the front side and two spiral blades 24 wound around the outer peripheral surface thereof. And the foremost tip of the spiral blade 24 is along the rotation axis of the handling cylinder 18 in each of the examples described below. has a surface that is generally nearly orthogonal (hereinafter simply referred to as orthogonal). Note that FIG. 4(a) is a view of the scraping-in part 19 in FIG. 4(b) seen from the front side.

[0024] (Example 1) The spiral blade 24 is composed of a spiral support plate 24b fixed to the base 23, a blade part 24a detachably attached to the working surface side of the outer peripheral part of the support plate 24b with bolts 24c, etc., and an auxiliary plate 24e. Here, the working surface side means the surface W that contacts the stalks and forcibly feeds the stalks toward the handling cylinder 18 when the scraping-in part 19 rotates clockwise (arrow N) in FIG. 4(a) in front view and in the direction of the front side of the paper (arrow N) in FIG. 4(b) in side view.

[0025] Note that 23a is the foremost end of the base 23 and 23b is the rearmost end of the base 23. Also, 24d is a disk attached to the foremost surface.

[0026] Note that a reinforcing rib 27 is fixed between the front surface of the support plate 24b and the outer peripheral surface of the base 23 so as to be orthogonal to play a role in reinforcement.

[0027] FIG. 5 is a partially enlarged view of FIG. 4(a). In FIGS. 4(a) and 5, the line R is the center line of the frustum-shaped base 23 in the front view of the scraping-in part 19, indicating the normal line to the frustum-shaped circle.

[0028] The main part 24b1 of the front edge of the above-mentioned support plate 24b with respect to the rotation direction is erected with a retreat angle with respect to the center line (normal line) of the base 23 as shown in FIGS. 4(a) and 5 in front view. Also, the corresponding front edge 24a1 of the blade part 24a attached with the front edge side aligned to the support plate 24b is also attached with a retreat angle.

[0029] Furthermore, on the main part 24b1 of the front edge of the support plate 24b and the front edge 24a1 of the blade part 24a, an auxiliary plate 24e having a substantially trapezoidal shape when viewed from the front is fixed to the working surface W side with bolts in a state where a part thereof protrudes in the rotational direction.

[0030] The front end side 24e1, which is the protruding part of this auxiliary plate 24e, is bent slightly rearward along a folding line 24e1a. Yes.

[0032] In addition, in this embodiment, the foremost edge of the front end side 24e1, which is the protruding part, is set to substantially coincide with the center line (normal line) of the base 23.

[0033] Furthermore, since the blade part 24a is detachable from the support plate 24b, it is possible to easily replace the blade part 24a, which is severely worn. Moreover, since the auxiliary plate 24e is also detachable from the support plate 24b and the blade part 24a, it is possible to easily replace the most severely worn auxiliary plate 24e.

[0034] (Example 2) Note that, without using such an auxiliary plate 24e, the shapes of the main part 24b1 of the front edge of the support plate 24b and the front edge 24a1 of the blade part 24a itself may be extended together so as to have the same shape as that of the auxiliary plate 24e. That is, the surface formed by the extended parts of the main part 24b1 of the front edge of the support plate 24b and the front edge 24a1 of the blade part 24a may be formed to be orthogonal to the rotation axis 18a of the handling cylinder 18, that is, parallel to the rotational direction. Each of the extended parts of the main part 24b1 of the front edge of the support plate 24b and the front edge 24a1 of the blade part 24a is an example of the foremost tip part of the spiral blade of the present invention.

[0035] Thereby, there is an advantage that the mounting process of the auxiliary plate 24e can be omitted. In the case of this Example 2, the spiral blade 24 is composed of the support plate 24b and the blade part 24a, and it means that the auxiliary plate 24e is unnecessary.

[0036] (Example 3) Furthermore, the spiral blade 24 does not necessarily have to be composed of the support plate 24b and the blade part 24a in the first place, and it may be composed of only the support plate 24b or a spiral member in which both are integrally formed.

[0037] In such a case, the front edge of the support plate 24b or the front edge of the integrally formed member can be made to form a plane orthogonal to the rotation axis 18a of the handling cylinder 18, that is, parallel to the rotation direction. In that case, this front edge is an example of the foremost tip of the spiral blade of the present invention.

[0038] [Second Embodiment] FIG. 6 shows the second embodiment. As shown in FIG. 6(b) in side view, the scraping-in part 19 is composed of a truncated conical base 23 that is narrower toward the front side and two spiral blades 24 wound around the outer peripheral surface thereof. Note that FIG. 6(a) is a view of the scraping-in part 19 in FIG. 6(b) seen from the front side.

[0039] In this second embodiment, the spiral blade 24 is composed of the support plate 24b, and the main part 24b1 of the front edge with respect to the rotation direction stands upright with a backward angle with respect to the center line (normal line) of the base 23 as shown in FIG. 6(a) in front view.

[0040] Furthermore, along the end of the main part 24b1 of the front edge of the foremost tip of the support plate 24b having the backward angle, a round bar 30 is attached to the non-acting surface side thereof. As a result, it is easy to catch the straw on the base 23 side of the round bar 30, but in the upper part, since the round bar does not bend further in the spiral direction as in the prior art, the contact area is reduced and it becomes easy to enter the handling chamber.

[0041] In this way, it is easy to take in, the straw is easily released, and rotation can also be prevented.

[0042] [Third Embodiment] FIG. 7 shows a third embodiment. As shown in FIG. 7(b) in side view, the raking-in portion 19 is composed of a truncated conical base 23 that is narrower toward the front side and two spiral blades 24 wound around the outer peripheral surface thereof. Note that FIG. 7(a) is a view of the raking-in portion 19 of FIG. 7(b) seen from the front side.

[0043] In this third embodiment, the spiral blade 24 is composed of a support plate 24b, and the main portion 24b1 of the front edge with reference to the rotation direction is erected vertically on the center line (normal line) of the base 23 as shown in FIG. 7(a) in front view. That is, it is erected without having a backward angle.

[0044] And along the end of the main portion 24b1 of the front edge of the foremost tip of the support plate 24b that is erected vertically, a round bar 30 is attached to the non-acting surface side thereof.

[0045] Thereby, the intake is improved by the vertical portion of the support plate 24b, the separation of the straw is improved by the round bar, and the rotation can also be prevented.

[0046] [Fourth Embodiment] FIG. 8 shows a fourth embodiment. As shown in FIG. 8(b) in side view, the raking-in portion 19 is composed of a truncated conical base 23 that is narrower toward the front side and two spiral blades 24 wound around the outer peripheral surface thereof. Note that FIG. 8(a) is a view of the raking-in portion 19 of FIG. 8(b) seen from the front side.

[0047] In this fourth embodiment, the spiral blade 24 is composed of a support plate 24b, and the main portion 24b1 of the front edge with reference to the rotation direction is erected by being bent rearward with respect to the center line (normal line) of the base 23 as shown in FIG. 8(a) in front view, or is erected in an arc shape.

[0048] Thereby, the separation of the straw is improved, and the rotation can also be prevented.

[0049] Furthermore, along the edge of the main part 24b1 at the front edge of the foremost tip of the support plate 24b, which is bent or erected in an arc shape, on the non-acting surface side thereof, a round bar 30 that is bent or in an arc shape to match the bent or arc shape is attached (not shown).

[0050] This improves the separation of the straw and can also prevent it from being carried around.

[0051] Note that in FIGS. 8(a) and 8(b), it was bent or in an arc shape without a retreat angle portion, but after providing a retreat angle portion on the base 23 side, it may be bent or in an arc shape on the upper side thereof. Furthermore, it is also possible to arrange a round bar 30 having a shape matching those shapes.

[0052] [Related Examples]

[0053] (Example 1) FIG. 9(a) is a schematic front view of the handling cylinder 18, and is composed of a plurality of tooth bars 20 arranged in parallel in the handling cylinder axis direction and at a predetermined interval in the rotation direction, a plurality of ring frames 31 attached at a predetermined interval in the axis direction so as to be orthogonal to each tooth bar 20, and a plurality of U-shaped teeth 32 implanted in each ring frame 31. FIG. 9(b) is a partially enlarged front view of one U-shaped tooth 32.

[0054] In this example, the U-shaped tooth 32 is arranged on the front side of the ring frame 31 and is welded to the ring frame 31 at two arc-shaped corners 32a of its U shape.

[0055] This increases the welding margin and enables it to be firmly attached.

[0056] (Example 2) Figure 10 is a schematic front view of the handling cylinder 18, which is composed of a plurality of two-tooth bars 20 arranged parallel to the handling cylinder axis direction and at a predetermined interval in the rotation direction, a plurality of ring frames 31 attached at a predetermined interval in the axis direction so as to be orthogonal to each two-tooth bar 20, and a plurality of U-shaped teeth 32 implanted in each ring frame 31.

[0057] Also in this example, the U-shaped teeth 32 are arranged on the front side of the ring frame 31 and are welded to the ring frame 31 at the two arc-shaped corners 32a of the U-shape. Further, the U-shaped teeth 32 are welded with a retreat angle α. In the case of the figure, the handling cylinder 18 rotates counterclockwise.

[0058] As a result, the welding margin increases and it can be firmly attached.

[0059] (Example 3) Figure 11 is a partially enlarged schematic front view of the handling cylinder 18, which is composed of a plurality of two-tooth bars 20 arranged parallel to the handling cylinder axis direction and at a predetermined interval in the rotation direction, a plurality of ring frames 31 attached at a predetermined interval in the axis direction so as to be orthogonal to each two-tooth bar 20, and a plurality of U-shaped teeth 32 implanted in each ring frame 31.

[0060] In this example, the U-shaped teeth 32 are arranged on the rear side of the ring frame 31 and are welded to the ring frame 31 at the two arc-shaped corners 32a of the U-shape.

[0061] As a result, the welding margin increases and it can be firmly attached.

[0062] Note that in this example, a retreat angle may be provided for the U-shaped teeth 32 as in Example 2.

[0063] (Example 4) Fig. 12(a) is a schematic front view of the handling cylinder 18, which is composed of a plurality of two-tooth bars 20 arranged parallel to the handling cylinder axis direction and at a predetermined interval in the rotational direction, a plurality of ring frames 31 attached at a predetermined interval in the axis direction so as to be orthogonal to each two-tooth bar 20, and a plurality of inverted U-shaped teeth 32' implanted in each ring frame 31. Fig. 12(b) is a front view of a partially enlarged single inverted U-shaped tooth 32'.

[0064] In this example, the inverted U-shaped tooth 32' is arranged on the front side of the ring frame 31 and welded to the ring frame 31 at two end portions 32'a of its inverted U shape.

[0065] By this, since both ends are welded, the teeth become strong.

[0066] (Example 5) Fig. 13 is a schematic front view of the handling cylinder 18, which is composed of a plurality of two-tooth bars 20 arranged parallel to the handling cylinder axis direction and at a predetermined interval in the rotational direction, a plurality of ring frames 31 attached at a predetermined interval in the axis direction so as to be orthogonal to each two-tooth bar 20, and a plurality of inverted U-shaped teeth 32' implanted in each ring frame 31.

[0067] Also in this example, the inverted U-shaped tooth 32' is arranged on the front side of the ring frame 31 and welded to the ring frame 31 at two end portions 32'a of its inverted U shape. Further, the inverted U-shaped tooth 32' is welded with a retreat angle α. Note that the handling cylinder 18 rotates counterclockwise in the case of the figure.

[0068] By this, the separation of the processed object becomes better.

[0069] (Example 6) In this example, the inverted U-shaped tooth 32' is arranged on the rear side of the ring frame 31 and welded to the ring frame 31 at two end portions 32'a of its inverted U shape (not shown).

[0070] Furthermore, in this example, a retreat angle may also be provided for the inverted U-shaped tooth 32'.

Industrial Applicability

[0071] The present invention is optimal for the threshing device of a full-stalk input combine because it can smoothly take in and transfer the stalks even when a large amount of stalks are sent in.

Explanation of Signs

[0072] 1 Vehicle body 2 Traveling crawler 3 Weeding tool 4 Tine 5 Reel for scraping in 6 Mowing blade device 7 Table 8 Auger for scraping in 9 Pretreatment unit before mowing 10 Feeder house 11 Feed conveyor 12 Threshing device 13 Driver's seat 14 Control box 15 Grain tank 16 Discharge auger 17 Handling chamber 18 Handling cylinder 18a Rotating shaft 19 Scraping-in part 20 Two-tooth bar 21 Handling teeth 22 Concave 23 Base 24 Helical blade 24a Blade part 24a1 Front edge 24b Support plate 24b1 Main part of the front edge 24e Auxiliary plate 24e1 Front side 24e1a Folding line 25 Sorting device 27 Reinforcing rib 30 Round bar 31 Ring frame 32 U-shaped two-tooth 32a Arc-shaped corner 32’ Inverted U-shaped two-tooth The end of 32 R center line α retreat angle

Claims

【Claim 1】 A threshing device for a full-stalk feeding type combine equipped with a scraping-in part at the front end of the handling cylinder, which scrapes in and conveys the cut stalks fed and conveyed toward the front end thereof rearward as the handling cylinder rotates, wherein the scraping-in part has a frustum-shaped base and spiral vanes formed on the outer peripheral surface of the base from the front to the rear, the spiral vanes are composed of a spiral support plate fixed to the frustum-shaped base, a vane part detachably attached to the working surface side of the outer peripheral part of the support plate, and an auxiliary plate detachably attached to the working surface side of the support plate and the vane part, the main part of the front edge of the support plate and the front edge of the vane part are erected with a retreat angle with respect to the center line of the base in a front view, and the auxiliary plate is detachably fixed to the working surface side of the main part of the front edge of the support plate and the front edge of the vane part in a state where a part thereof protrudes in the rotational direction, a threshing device, characterized in that the front end side, which is the protruding part of the auxiliary plate, is bent rearward, and the foremost edge of the front end side, which is the protruding part, substantially coincides with the center line of the frustum-shaped base in a front view.

Images