Combine harvester
The combine harvester's innovative design with a conveying spiral and rocking device efficiently distributes grains, reducing load and clogging, even with moist grains, by using a rocking shaft and swinging members to guide grains into the spiral.
Patent Information
- Application Number
- JP2024112416
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2044-07-12
AI Technical Summary
Conventional rocking devices in combine harvesters face issues with rocking shaft failure under heavy grain loads, especially with moist grains, and struggle to effectively disperse grains due to high resistance.
A combine harvester design featuring a conveying spiral device at the bottom of the grain tank and a rocking device above it, comprising a rocking shaft and plate-shaped connecting members, with rod-shaped or angle-shaped swinging members, to efficiently distribute grains and reduce load.
The design effectively reduces grain load on the rocking members, allows efficient grain distribution into the conveying spiral, and minimizes clogging by guiding grains downward, even with moist grains.
Smart Images
Figure 2026011640000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a combine harvester equipped with a grain tank that stores grains that have been threshed and sorted by a threshing device. [Background technology]
[0002] In order to prevent the grains stored in the grain tank from clogging, a conventional technique is known in which a shaking device is disposed above a conveying spiral device that conveys the grains arranged at the bottom of the grain tank to a discharge auger, and that shakes the stored grains to cause them to leak out (Patent Document 1). [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-92086 Summary of the Invention [Problem to be solved by the invention]
[0004] However, the rocking device of Patent Document 1 has a risk of being unable to rock the rocking shaft supporting the rocking rectangular plate-like member (diffusion plate) when a large load is applied to the rocking rectangular plate-like member (diffusion plate) from grains, especially grains containing a lot of moisture. Also, simply extending the crank-shaped rod-like member (diffusion rod) in the left and right directions reduces resistance but has little effect on diffusing the grains.
[0005] Therefore, an object of the present invention is to propose a combine harvester equipped with a grain tank equipped with a rocking device that can efficiently drop grains into a conveying spiral device. [Means for solving the problem]
[0006] The present invention, which has solved the above problems, is as follows. That is, the invention described in claim 1 is a combine harvester provided with a pre-harvesting device (3) for harvesting stalks at the front of a machine frame (1), a thresher (4) for threshing and sorting the stalks at the rear left side of the pre-harvesting device (3), a control section (5) on which an operator sits at the rear right side of the pre-harvesting device (3), a grain tank (7) for storing the threshed and sorted grains at the rear of the control section (5), and a discharge auger (8) for discharging the grains stored in the grain tank (7) to the outside, This combine harvester is characterized in that a conveying spiral device (24) extending in the forward / backward direction is arranged below the grain tank (7) to transport the grain stored in the grain tank (7) to a discharge auger (8), and a rocking device (30) for rocking the grain stored in the grain tank (7) is arranged above the conveying spiral device (24), the rocking device (30) is formed of a rocking shaft (31) extending in the forward / backward direction and a rocking main body portion (32) that rocks around the axis of the rocking shaft (31), and the rocking main body portion (32) is formed of a pair of plate-shaped connecting members (34) fixed to the rocking shaft (31) at a predetermined distance in the forward / backward direction, and rocking members (35) extending in the forward / backward direction that are installed at four corners of the connecting member (34).
[0007] The invention of claim 2 is the combine harvester of claim 1, wherein the swinging member (35) is formed of a rod-shaped member having a circular longitudinal cross section in the left-right direction.
[0008] The invention of claim 3 is the combine harvester of claim 1, wherein the swinging member (35) is formed of an angle member having an L-shaped longitudinal cross section in the left-right direction.
[0009] The invention described in claim 4 is a combine harvester described in any one of claims 1 to 3, in which a support shaft (26) extending in the front-to-rear direction is provided between the conveying spiral device (24) and the rocking device (30) in the vertical direction, and a guide member (28) having a mountain-shaped vertical cross section in the left-to-right direction, one side of which slopes downward to the left and the other side of which slopes downward to the right, is fixed to the support shaft (26) to guide the grain stored in the grain tank (7) downward.
[0010] The invention described in claim 5 is a combine described in claim 4, in which the rocking device (30) and guide member (28) are arranged within a funnel portion (22) defined by the front wall (20A), rear wall (20B), a lower left wall (20E) formed downward to the right, and a lower right wall (20G) formed downward to the left of the grain tank (7).
[0011] The invention described in claim 6 is a combine described in claim 5, in which the rotating shaft (24A) of the conveying spiral device (24), the support shaft (26), and the oscillating shaft (31) are arranged at the same position in the left-right direction when viewed from the front.
[0012] A seventh aspect of the present invention is the combine harvester of the sixth aspect, wherein the length of the connecting member (34) in the left-right direction is longer than the length of the guide member (28) in the left-right direction when viewed from the front.
[0013] An eighth aspect of the present invention is the combine harvester of the seventh aspect, wherein the upper edge of the connecting member (34) is formed in an arc shape extending upward when viewed from the front.
[0014] The invention of claim 9 is the combine harvester of claim 5, wherein the rocking device (30) is provided only at the front and rear of the rocking shaft (31). [Effects of the Invention]
[0015] According to the invention described in claim 1, a conveying spiral device (24) extending in the forward / backward direction is arranged at the bottom of the grain tank (7) to transport the grain stored in the grain tank (7) to the discharge auger (8), and a rocking device (30) for rocking the grain stored in the grain tank (7) is arranged above the conveying spiral device (24). The rocking device (30) is formed of a rocking shaft (31) extending in the forward / backward direction and a rocking main body (32) that rocks around the axis of the rocking shaft (31). The rocking main body (32) is formed of a pair of plate-shaped connecting members (34) fixed to the rocking shaft (31) at a predetermined distance in the forward / backward direction, and rocking members (35) extending in the forward / backward direction that are installed at four corners of the connecting members (34). Therefore, the load applied to the rocking member (35) from the grain stored in the grain tank (7) can be reduced. In addition, the grains stored in the grain tank (7) can be shaken to efficiently drop the grains into the conveying spiral device (24).
[0016] According to the invention of claim 2, in addition to the effect of the invention of claim 1, the rocking member (35) is formed of a rod-shaped member having a circular longitudinal cross section in the left-right direction, so that the load from the grains acting on the rocking member (35) can be further reduced.
[0017] According to the invention of claim 3, in addition to the effect of the invention of claim 1, since the swinging member (35) is formed of an angle member having an L-shaped longitudinal cross section in the left-right direction, it is possible to swing a large number of grains.
[0018] According to the invention described in claim 4, in addition to the effects of the invention described in any one of claims 1 to 3, a support shaft (26) extending in the front-to-rear direction is provided between the conveying spiral device (24) and the rocking device (30) in the vertical direction, and a guide member (28) with a mountain-shaped vertical cross section in the left-to-right direction, one side of which slopes downward to the left and the other side slopes downward to the right, is fixed to the support shaft (26) to guide the grains stored in the grain tank (7) downward, so that grains that have leaked onto the guide member (28) can be guided downward to the left and right, thereby preventing the grains from clogging.
[0019] According to the invention described in claim 5, in addition to the effects of the invention described in claim 4, a rocking device (30) and a guide member (28) are arranged inside the funnel section (22) defined by the front wall (20A), rear wall (20B), lower left wall (20E) formed downward to the right, and lower right wall (20G) formed downward to the left of the grain tank (7), so that the leaking grains can be efficiently guided by the lower left wall (20E) and lower right wall (20G) to the conveying spiral device (24).
[0020] According to the invention of claim 6, in addition to the effect of the invention of claim 5, when viewed from the front, the rotating shaft (24A), the support shaft (26), and the swinging shaft (31) of the conveying spiral device (24) are arranged at the same position in the left-right direction, so that grains leaking onto the guide member (28) can be guided downward to the left and right, thereby further preventing grain clogging.
[0021] According to the invention of claim 7, in addition to the effect of the invention of claim 6, when viewed from the front, the length of the connecting member (34) in the left-right direction is made longer than the length of the guide member (28) in the left-right direction, so that the grains stored on the upper left and upper right sides of the guide member (28) can be swung and allowed to drop.
[0022] According to the invention described in claim 8, in addition to the effect of the invention described in claim 7, the upper edge of the connecting member (34) is formed in an arc shape extending upward when viewed from the front, which further reduces the load from the grains acting on the upper edge of the connecting member (34) during swinging.
[0023] According to the invention of claim 9, in addition to the effect of the invention of claim 5, since the swinging device (30) is provided only at the front and rear of the swinging shaft (31), the load for swinging the swinging shaft (31) can be reduced, thereby suppressing the load on the engine. [Brief explanation of the drawings]
[0024] [Figure 1] FIG. [Figure 2] FIG. 1 is a right side view of a combine harvester. [Figure 3] FIG. 1 is a front view of the grain tank. [Figure 4] This is a right side view of the grain tank. [Figure 5] FIG. 1 is a vertical cross-sectional view of the lower part of the grain tank in the left-right direction. [Figure 6] FIG. 1 is a longitudinal cross-sectional view of the lower part of the grain tank in the front-to-rear direction. [Figure 7] 1 is a perspective view of a rocking device according to a first embodiment, viewed from the front right side. [Figure 8] FIG. 4 is a front view of a connecting member of the swing body of the swing device. [Figure 9] FIG. [Figure 10] FIG. 10 is a perspective view of a rocking device according to a second embodiment, as viewed from the front right side. [Figure 11] FIG. 11 is a perspective view of a rocking device according to a third embodiment, as viewed from the front right side. DETAILED DESCRIPTION OF THE INVENTION
[0025] As shown in Figures 1 and 2, a general-purpose combine harvester has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of a body frame 1, a pre-harvesting processing device 3 that harvests stalks in the field on the front side of the body frame 1, a threshing device 4 that threshers and sorts the harvested stalks on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator sits on the rear right side of the pre-harvesting processing device 3.
[0026] An engine room 6 that houses the engine is provided below the control unit 5, a grain tank 7 that stores threshed and sorted grain is provided behind the control unit 5, and a discharge auger 8 that discharges the grain to the outside is provided behind the grain tank 7.
[0027] The pre-harvesting processing device 3 is composed of a raking device 3A that stands the stalks in the field and transports them to the rear, a cutting blade device 3B that cuts the base of the stalks transported to the rear of the raking device 3A, an auger device 3C that gathers the transported stalks to the left side, and a feeder house 3D that transports the gathered stalks to the threshing device 4.
[0028] A sun visor 10 that blocks direct sunlight is provided above the control unit 5. The sun visor 10 is supported so as to be movable in the vertical direction by a support member 11 that extends in the vertical direction and is provided on the front wall of the grain tank 7. This allows the sun visor 10 to be moved in the vertical direction to suit the operator's physique.
[0029] The discharge auger 8 is formed from a vertical discharge section 8A equipped with a conveying spiral extending vertically at the rear side of the grain tank 7, and a horizontal discharge section 8B equipped with a conveying spiral extending from the top of the vertical discharge section 8A toward the front left side, and a discharge section 8C for discharging grains is formed at the front end of the horizontal discharge section 8B.
[0030] As shown in Figures 3 and 4, the grain tank 7 is formed from a front wall 20A, a rear wall 20B, an upper wall 20C connected to the upper parts of the front wall 20A and the rear wall 20B, an upper left wall 20D connected to the upper left parts of the front wall 20A and the rear wall 20B, a lower left wall 20E connected to the lower left parts of the front wall 20A and the rear wall 20B, an upper right wall 20F connected to the upper right parts of the front wall 20A and the rear wall 20B, and a lower right wall 20G connected to the lower right parts of the front wall 20A and the rear wall 20B.
[0031] An entrance 21 is formed at the upper front portion of the upper left wall 20D to which the discharge portion of a grain lifting tube (not shown) that transports grains threshed and sorted by the threshing device 4 to the grain tank 7 is connected. The lower left wall 20E is formed downward to the right from the lower end of the upper left wall 20D, and the lower right wall 20G is formed downward to the left from the lower end of the upper right wall 20F.
[0032] As shown in Figures 5 and 6, a funnel section 22 having an inverted triangular cross section in the left-right direction, defined by the front wall 20A, the rear wall 20B, the lower left wall 20E, and the lower part of the upper left wall 20D, has a conveying spiral device 24 extending in the front-to-rear direction at the bottom, which conveys the grain stored in the grain tank 7 to the vertical discharge section 8A.
[0033] Above the conveying spiral device 24 in the funnel section 22, a support shaft 26 extending in the front-to-rear direction is provided, spanning the front wall 20A and the rear wall 20B, and a guide member 28 having a mountain-shaped cross section in the left-to-right direction is attached to the support shaft 26.
[0034] Guide member 28 is formed from left plate member 28A and right plate member 28B, with left plate member 28A formed downward to the left from the top, and right plate member 28B formed downward to the right from the top. This allows grains stored above guide member 28 to be guided toward lower left wall 20E and lower right wall 20G, allowing the grains to efficiently leak down into conveying spiral device 24.
[0035] A rocking device 30 is provided above the guide member 28 in the funnel section 22 to rock the grains stored above the guide member 28 in the vertical and horizontal directions. This prevents the grains stored above the guide member 28 from clogging, and allows the grains to efficiently leak down through the guide member 28 to the conveying spiral device 24.
[0036] <Oscillating device of first embodiment> As shown in Figure 7, the oscillating device 30 of the first embodiment is formed from an oscillating shaft 31 extending in the front-to-rear direction and rotatably mounted on the front wall 20A and the rear wall 20B, and an oscillating main body portion 32 attached to the front and rear portions of the oscillating shaft 31.
[0037] The swinging main body 32 is formed by a connecting member 34 attached to the swinging shaft 31 at a predetermined distance in the front-rear direction, and rod-shaped swinging members 35 with a circular cross section in the left-right direction attached to the four corners of the connecting member 34. As shown in FIG. 5 , the left-right length of the connecting member 34 is longer than the left-right length of the guide member 28. This allows the swinging member 35 to swing around the axis of the swinging shaft 31, causing the grain stored above the guide member 28 near the inner surfaces of the front wall 20A and rear wall 20B of the grain tank 7 to swing widely in the vertical and left-right directions, thereby efficiently dropping the grain into the conveying spiral device 24. This also reduces the load on the engine. The swinging members 35 are attached by inserting them in the front-rear direction through openings formed in the four corners of the connecting member 34. In particular, when the grains are wet, only the grains around the conveying spiral device 24 are conveyed, and the grains above the conveying spiral device 24 become clumped together and do not leak down into the conveying spiral device 24. For this reason, by making cuts in the top and bottom directions of the clumped grains with the connecting member 34 and making cuts (arc-shaped cuts) in the top and bottom directions and the front and back directions with the swinging member 35, the clumped grains break down and leak down into the conveying spiral device 24. Moreover, the connecting member 34 and the swinging member 35 experience almost no resistance from the grains.
[0038] 8(a) to 8(e) show front views of the connecting member 34 of the first to fifth embodiments, respectively. The connecting member 34 of the first embodiment is a rectangular member with trapezoidal cutouts at the top and bottom. This makes it possible to reduce the weight of the connecting member 34 and the load on the engine. The connecting member 34 of the second embodiment is a rectangular member with trapezoidal cutouts at the top and bottom, and with mountain-shaped cutouts at the left and right sides. This makes it possible to make the connecting member 34 even lighter.
[0039] The connecting member 34 of the third embodiment is a substantially semicircular member with linear cutouts on the left and right sides and a trapezoidal cutout on the bottom. This reduces the reaction force of the kernels acting on the top of the connecting member 34 during swinging, allowing the connecting member 34 to swing smoothly, reducing the load on the engine and also suppressing damage to the kernel husks. The connecting member 34 of the fourth embodiment is a substantially semicircular member with a trapezoidal cutout on the bottom. This allows the connecting member 34 to swing more smoothly. The connecting member 34 of the fifth embodiment has an arc portion extending downward formed at the bottom of the substantially semicircular member. This allows the connecting member 34 to swing even more smoothly.
[0040] As shown in FIG. 9, the conveying spiral device 24 is formed by a front wall 20A, a rotating shaft 24A rotatably mounted on the rear wall 20B and extending in the front-to-rear direction, and a spiral portion 24B attached to the rotating shaft 24A.
[0041] The rotating shaft 24A and the oscillating shaft 31 are connected via an arm 40, the lower part of which is fixed to the rotating shaft 24A, and an arm 42, the upper part of which is fixed to the oscillating shaft 31. The upper part of the arm 40 and the lower part of the arm 42 are rotatably mounted on a pin 41 extending in the front-to-rear direction. This allows the output rotation of the engine transmitted to the rotating shaft 24A to be transmitted to the oscillating shaft 31, causing the oscillating shaft 31 to oscillate around its axis. Also, as shown in FIG. 5 , the rotating shaft 24A, the support shaft 26, and the oscillating shaft 31 are located at the same position in the left-to-right direction. This allows the grains oscillated by the oscillating member 35 of the oscillating main body 32 to efficiently drop into the conveying spiral device 24 via the guide member 28.
[0042] <Oscillating device of second embodiment> A rocking device 30 according to a second embodiment is shown in Fig. 10. The same components as those of the rocking device 30 according to the first embodiment are given the same reference numerals and will not be described again.
[0043] The rocking device 30 of the second embodiment has three rocking main bodies 32 attached to the front, middle, and rear of the rocking shaft 31. This allows the grains stored above the guide member 28 to be rocked widely in the vertical and horizontal directions, allowing the grains to efficiently fall down the conveying spiral device 24.
[0044] <Oscillating device of the third embodiment> A rocking device 30 according to a third embodiment is shown in Fig. 11. The same components as those in the rocking device 30 according to the first embodiment are given the same reference numerals and will not be described again.
[0045] In the third embodiment of the rocking device 30, angle-shaped rocking members 35 with an L-shaped vertical cross section in the left-right direction are attached to the outer periphery of the four corners of a connecting member 34, which is attached at a predetermined distance in the front-rear direction to the rocking shaft 31 of the rocking main body 32. This allows a large amount of grain stored near the inner surfaces of the front wall 20A and rear wall 20B of the grain tank 7 to be rocked significantly in the up-down and left-right directions, allowing the grain to efficiently fall down through the conveying spiral device 24. By using the L-shaped rocking members 35, it is possible to break down clumped grain while minimizing the load on the grain. Alternatively, L-shaped openings can be formed in the four corners of the connecting member 34, and the angle-shaped rocking members 35 can be inserted through the openings to be attached. [Explanation of symbols]
[0046] 1 Aircraft frame 2 Running gear 3 Pre-harvest processing equipment 4. Threshing equipment 5 Control Unit 7. Glentank 8 Discharge Auger 20A front wall 20B Back wall 20E Lower left wall 20G lower right wall 22 Funnel part 24 Conveying spiral device 24A Rotating shaft 26 Spindle 28 Guide member 30 Oscillating device 31 Oscillating shaft 32 Swinging main body 34 Connecting member 35 Swinging member
Claims
1. A combine harvester is provided in front of a body frame (1) with a pre-harvesting treatment device (3) for harvesting stalks, a threshing device (4) for threshing and sorting the stalks is provided on the rear left side of the pre-harvesting treatment device (3), a control section (5) on which an operator rides is provided on the rear right side of the pre-harvesting treatment device (3), a grain tank (7) for storing the threshed and sorted grains is provided behind the control section (5), and a discharge auger (8) for discharging the grains stored in the grain tank (7) to the outside, A conveying spiral device (24) extending in the front-rear direction is disposed at the bottom of the grain tank (7) to convey the grain stored in the grain tank (7) to a discharge auger (8), A rocking device (30) for rocking the grains stored in the grain tank (7) is disposed above the conveying spiral device (24), The swinging device (30) is formed of a swinging shaft (31) extending in the front-rear direction and a swinging main body (32) swinging around the axis of the swinging shaft (31), The combine harvester is characterized in that the swinging main body (32) is formed by a pair of plate-shaped connecting members (34) fixed to the swinging shaft (31) at a predetermined distance in the front-to-rear direction, and swinging members (35) extending in the front-to-rear direction and installed at four corners of the connecting members (34).
2. 2. A combine harvester according to claim 1, wherein the rocking member (35) is formed of a rod-shaped member having a circular longitudinal cross section in the left-right direction.
3. 2. A combine harvester according to claim 1, wherein the swinging member (35) is formed of an angle member having an L-shaped longitudinal section in the left-right direction.
4. A combine harvester as described in any one of claims 1 to 3, in which a support shaft (26) extending in the front-to-rear direction is provided between the conveying spiral device (24) and the rocking device (30) in the vertical direction, and a guide member (28) having a mountain-shaped vertical cross section in the left-to-right direction, one side of which slopes downward to the left and the other side of which slopes downward to the right, is fixed to the support shaft (26) to guide the grain stored in the grain tank (7) downward.
5. A combine harvester as described in claim 4, wherein the rocking device (30) and guide member (28) are arranged within a funnel section (22) defined by a front wall (20A), a rear wall (20B), a lower left wall (20E) formed downward to the right, and a lower right wall (20G) formed downward to the left of the grain tank (7).
6. 6. The combine harvester according to claim 5, wherein the rotating shaft (24A) of the conveying spiral device (24), the support shaft (26), and the swing shaft (31) are provided at the same position in the left-right direction when viewed from the front.
7. 7. The combine harvester according to claim 6, wherein the length of the connecting member (34) in the left-right direction is longer than the length of the guide member (28) in the left-right direction when viewed from the front.
8. 8. A combine harvester according to claim 7, wherein an upper edge of the connecting member (34) is formed in an arc shape extending upward when viewed from the front.
9. 6. A combine harvester according to claim 5, wherein the rocking device (30) is provided only at the front and rear of the rocking shaft (31).
Citation Information
Patent Citations
Combine harvester
JP2011092086A