combine

Abstract

To propose a combine harvester capable of preventing displacement of the axis of a counter shaft and maintaining good rotation of the counter shaft. [Solution] In a combine harvester having a pre-harvesting processing device (3) for harvesting stalks provided in front of a body frame (1) on which an engine (E) is mounted, and a threshing device (4) for threshing and sorting the stalks provided behind the pre-harvesting processing device (3), a pair of left and right vertical frames (30L, 30R) extending upward from the body frame (1) are provided in front of the threshing device (4), and a counter shaft (31) extending in the left-right direction to transmit the output rotation of the engine (E) is fixed freely rotatable to the front of the vertical frames (30L, 30R).

Description

[Technical field]

[0001] The present invention relates to a combine harvester having a countershaft to which the output rotation of an engine of the combine harvester is transmitted. [Background technology]

[0002] A conventional technique is known in which a counter shaft to which the output rotation of an engine is transmitted is provided penetrating the left and right walls of a threshing device, and a winnowing machine that blows sorting air is supported on the counter shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-91259 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technique of Patent Document 1, there is a risk that the axis of the counter shaft may be displaced due to vibrations of the winnowing machine or the like, resulting in poor rotation of the counter shaft.

[0005] Therefore, a main object of the present invention is to propose a combine harvester that can prevent displacement of the axis of the counter shaft and maintain good rotation of the counter shaft. [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 in which a pre-harvesting device (3) for harvesting stalks is provided in front of a machine frame (1) on which an engine (E) is mounted, and a threshing device (4) for threshing and sorting the stalks is provided behind the pre-harvesting device (3). This combine harvester is characterized in that a pair of left and right vertical frames (30L, 30R) extending upward from the body frame (1) are provided at the front of the threshing device (4), and a counter shaft (31) extending in the left-right direction to which the output rotation of the engine (E) is transmitted is fixed freely rotatably to the front surface of the vertical frames (30L, 30R).

[0007] The invention described in claim 2 is a combine described in claim 1, in which the output rotation transmitted to the counter shaft (31) is transmitted to a winnower (25) that blows sorting air for the threshing device (4) via a first pulley (31E) supported on the counter shaft (31).

[0008] The invention described in claim 3 is a combine according to claim 1 or 2, in which the pre-harvesting processing device (3) is formed of a conveying device (3A) that transports the culms to the rear while standing them up, a cutting blade device (3B) that cuts the base of the culms, an auger device (3C) that gathers the transported culms to the left side, and a feeder house (3D) that transports the gathered culms to the threshing device (4), and a first drive shaft (34) extending in the left-right direction is provided above the counter shaft (31) to transmit output rotation to the feeder house (3D).

[0009] The invention described in claim 4 is a combine described in claim 3, in which the counter shaft (31) is positioned rearward of the first drive shaft (34) and forward of the vertical frames (30L, 30R) in side view.

[0010] The invention described in claim 5 is a combine described in claim 3, in which a second drive shaft (40) extending in the left-right direction is provided above the first drive shaft (34) to transmit output rotation to the threshing drum (11) of the threshing device (4).

[0011] The invention described in claim 6 is the combine described in claim 5, in which the counter shaft (31) is arranged rearward of the first drive shaft (34) and rearward of the second drive shaft (40) in side view.

[0012] The invention described in claim 7 is the combine harvester described in claim 6, in which the output rotation transmitted to the second drive shaft (40) is transmitted to the first drive shaft (34) via a second pulley (40B) and a mowing clutch (64), the output rotation transmitted to the counter shaft (31) is transmitted to the first drive shaft (34) via a third pulley (31D) and a mowing reverse clutch (65), and when the mowing clutch (64) is engaged, the mowing reverse clutch (65) is disengaged, and when the mowing clutch (64) is disengaged, the mowing reverse clutch (65) is engaged. Effect of the Invention

[0013] According to the invention described in claim 1, a pair of left and right vertical frames (30L, 30R) extending upward from the body frame (1) are provided at the front of the threshing device (4), and a counter shaft (31) extending in the left-right direction to transmit the output rotation of the engine (E) is rotatably fixed to the front surface of the vertical frames (30L, 30R). Therefore, the counter shaft (31) is firmly fixed to the vertical frames (30L, 30R) to prevent both ends of the counter shaft (31) from being displaced in the up-down direction, etc.

[0014] According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the output rotation transmitted to the counter shaft (31) is transmitted to the winnower (25), which blows the sorting air for the threshing device (4), via the first pulley (31E) supported on the counter shaft (31), thereby making it possible to suppress the transmission of vibrations generated in the winnower (25) to the counter shaft (31).

[0015] According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, the pre-harvest processing device (3) is formed of a conveying device (3A) that conveys the culms to the rear while standing them up, a cutting blade device (3B) that cuts the base of the culms, an auger device (3C) that gathers the transported culms to the left side, and a feeder house (3D) that transports the gathered culms to the threshing device (4).A first drive shaft (34) extending in the left-right direction for transmitting output rotation to the feeder house (3D) is provided above the counter shaft (31).This increases the rigidity of the vertical frames (30L, 30R) and prevents deformation of the vertical frames (30L, 30R).

[0016] According to the invention recited in claim 4, in addition to the effects of the invention recited in claim 3, in side view, the counter shaft (31) is disposed rearward of the first drive shaft (34) and forward of the vertical frames (30L, 30R), which makes it easy to arrange the belt that transmits the output rotation.

[0017] According to the invention described in claim 5, in addition to the effects of the invention described in claim 3, a second drive shaft (40) extending in the left-right direction for transmitting output rotation to the threshing drum (11) of the threshing device (4) is provided above the first drive shaft (34), thereby further increasing the rigidity of the vertical frames (30L, 30R) and making it possible to better prevent deformation of the vertical frames (30L, 30R).

[0018] According to the invention recited in claim 6, in addition to the effects of the invention recited in claim 5, in side view, the counter shaft (31) is disposed rearward of the first drive shaft (34) and rearward of the second drive shaft (40), so that the arrangement of the belt that transmits the output rotation can be made easier.

[0019] According to the invention recited in claim 7, in addition to the effects of the invention recited in claim 6, the output rotation transmitted to the second drive shaft (40) is transmitted to the first drive shaft (34) via the second pulley (40B) and the mowing clutch (64), and the output rotation transmitted to the counter shaft (31) is transmitted to the first drive shaft (34) via the third pulley (31D) and the mowing reverse clutch (65). When the mowing clutch (64) is engaged, the mowing reverse clutch (65) is disengaged, and when the mowing clutch (64) is disengaged, the mowing reverse clutch (65) is engaged. Therefore, the torsional moment applied to the counter shaft (31) can be reduced, and the torsional angle generated in the counter shaft (31) can be suppressed. [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of the threshing device in the front-to-rear direction. [Diagram 5] FIG. 2 is a perspective view of the feeder house and threshing device as viewed from the front left side. [Figure 6] FIG. 2 is a perspective view of the feeder house and the threshing device as viewed from the front right side. [Figure 7] FIG. 2 is a left side view of the feeder house and threshing device. [Figure 8] FIG. 2 is a right side view of the feeder house and the threshing device. [Figure 9] FIG. 2 is a front view of the feeder house and the threshing device. [Figure 10] FIG. 2 is a perspective view of the threshing apparatus as viewed from the front left side. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] 3 is a transmission diagram of the output rotation of the engine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] As shown in Figures 1 to 3, 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 grain stalks in the field is provided on the front side of the body frame 1, a thresher 4 that threshes and sorts the harvested grain stalks is provided on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator sits is provided on the rear right side of the pre-harvesting processing device 3.

[0022] An engine room 6 housing the engine E is provided below the control unit 5, a grain tank 7 for storing threshed and sorted grains is provided behind the control unit 5, and a discharge auger 8 for discharging the grains to the outside is provided behind the grain tank 7.

[0023] The pre-harvesting processing device 3 is composed of a conveying device 3A that transports the culms in the field to the rear while standing them up, a cutting blade device 3B that cuts the base of the culms transported to the lower rear side of the conveying device 3A, an auger device 3C that gathers the culms transported to the rear side of the conveying device 3A to the left side, and a feeder house 3D that transports the gathered culms to the threshing device 4.

[0024] As shown in FIG. 4, the threshing device 4 is formed of a threshing chamber 10 for threshing stalks and a sorting chamber 20 for sorting the threshed grains.

[0025] A threshing drum 11 for threshing the stalks transported from the feeder house 3D is installed on the front and rear walls of the threshing chamber 10, and a receiving net 12 formed in a semicircular arc shape is provided on the underside of the threshing drum 11 along the lower outer periphery of the threshing drum 11. The upper part of the threshing drum 11 is covered with an openable threshing drum cover 13, and a dust conveying plate for guiding the stalks to the rear of the threshing chamber 10 is provided on the inner periphery of the threshing drum cover 13. The threshing drum 11 is supported by a rotor shaft 14 extending in the front-rear direction.

[0026] At the top of the sorting chamber 20, there is provided a oscillating sorting device 21 which sorts and processes grains leaking down from the handling chamber 10. At the bottom of the oscillating sorting device 21, there are provided, in order from the front, a winnower 25 which blows sorting air to the oscillating sorting device 21, a wind splitter 26 which changes the blowing direction of the sorting air behind the winnower 25, a first spiral 27 which transports grains leaking down from the oscillating sorting device 21 to the grain tank 7, and a second spiral 28 which re-transports grains with rachis branches or the like attached and broken stalks or the like leaking down from the rear of the oscillating sorting device 21 to the sorting shelf at the front of the oscillating sorting device 21.

[0027] As shown in Figures 5 and 6, vertical frames 30L, 30R extending upward from the machine frame 1 are provided on both sides of the front part of the threshing device 4. As shown in Figure 9, the vertical frame 30L is provided to the left of the left wall of the feeder house 3D, and the vertical frame 30R is provided to the right of the right wall of the feeder house 3D. Also, as shown in Figure 10, an inlet funnel 50 that receives the stalks transported by the feeder house 3D is provided between the vertical frames 30L, 30R behind the rear part of the feeder house 3D.

[0028] A cylinder 32 is provided on the front surface of the vertical frames 30L, 30R via a support member 33, and rotatably accommodates a counter shaft 31 extending in the left-right direction for transmitting the output rotation of the engine E to the oscillating sorting device 21 and the like.

[0029] Above the counter shaft 31, a cylinder 35 is provided via a support member 36, which rotatably accommodates an elevator drive shaft ("first drive shaft" in the claims) 34 that drives an elevator accommodated in a feeder house 3D extending in the left-right direction for transmitting the output rotation of the engine E to the transport device 3A, etc. The lifting and lowering rotation fulcrum of the pre-harvesting treatment device 3, which is also the lifting and lowering rotation fulcrum of the feeder house 3D, is coaxial with the elevator drive shaft 34 and is formed in the support member 36, resulting in a compact configuration.

[0030] In addition, above the elevator drive shaft 34 on the front side of the vertical frame 30L, a cylinder 38 that rotatably houses a mowing reversal drive shaft 37 that reverses the driving direction of the pre-mowing processing device 3 is provided via a support member 39.

[0031] A cylinder 41 is provided on the front surface of the vertical frame 30R via a support member 42, and rotatably accommodates the handling drum drive shaft (the "second drive shaft" in the claims) 40 extending to the right from the vertical frame 30R to transmit the output rotation of the engine E to the handling drum 11.

[0032] This makes it easy to arrange the belt that transmits the output rotation of the engine E. In addition, the cylinder 32 housing the countershaft 31 and the cylinder 35 housing the elevator drive shaft 34 connect the vertical frames 30L and 30R and also function as strength members that increase the strength of the vertical frames 30L and 30R. This increases the rigidity of the vertical frames 30L and 30R and makes it possible to prevent deformation, etc.

[0033] 7 to 9, in the up-down direction, the counter shaft 31 is provided above the winnowing shaft 25A of the winnower 25 and below the elevator drive shaft 34 and the threshing drum drive shaft 40, and in the front-rear direction, the counter shaft 31 is provided in front of the winnowing shaft 25A of the winnower 25 and behind the elevator drive shaft 34 and the threshing drum drive shaft 40. This makes it easier to arrange the belt that transmits the output rotation of the engine E. In particular, the elevator drive shaft 34 and the threshing drum drive shaft 40 are arranged in a direction away from the vertical frames 30L and 30R forward, which creates a predetermined gap, making it easier to perform maintenance and management of the belt, etc.

[0034] In addition, in the up-down direction, the counter shaft 31 is provided below the rotor shaft 14 and the inlet funnel 50, and in the front-to-rear direction, the counter shaft 31 is provided behind the elevator drive shaft 34 and forward of the front end 14F of the rotor shaft 14 and the front end 50F of the inlet funnel 50. This allows the counter shaft 31 to be provided close to the vertical frames 30L, 30R, which further increases the rigidity of the vertical frames 30L, 30R and makes it possible to better prevent deformation, etc.

[0035] A dust box 51 equipped with a fan for discharging dust adhering to the grain stalks transported by the elevator to the outside is provided on the upper wall of the feeder house 3D.

[0036] As shown in FIGS. 10 to 13, the left portion of the threshing drum drive shaft 40 is connected to the input shaft of a relay box 52 incorporating a bevel gear or the like for transmitting the output rotation of the threshing drum drive shaft 40 to the rotor shaft 14 .

[0037] The front part of the winnowing cover 53, which covers the upper, lower and front parts of the winnowing machine 25, is provided close to the rear surfaces of the vertical frames 30L, 30R. This allows the sorting chamber 20 to be longer in the front-to-rear direction, and allows sorting air to be efficiently blown from the winnowing machine 25 towards the oscillating sorting device 21. Note that although the rear surface of the vertical frame 30L and the front part of the winnowing cover 53 in Fig. 11 are spaced apart, the rear surface of the vertical frame 30L and the front part of the winnowing cover 53 can also be connected.

[0038] The oscillating sorting drive shaft 21A of the oscillating sorting device 21 is provided at the rear of the second spiral shaft 28A, the first grain lifting tube 54 that lifts grains into the grain tank 7 is provided at the right of the first spiral 27, and the second grain lifting tube 55 that transports second grains such as grains with attached stalks and broken culms back to the oscillating sorting device 21 at the right of the second spiral 28. Note that only the lower part of the first grain lifting tube 54 is shown in Figures 12 and 13.

[0039] As shown in FIG. 14, the output rotation of the engine E is transmitted to the traveling device 2 via a hydraulic continuously variable transmission (HST) 60 and a transmission 61 provided downstream of the power transmission path.

[0040] The output rotation of the engine E is transmitted to the counter shaft 31 via the threshing clutch 63 and pulley 31A provided downstream of the transmission path. The output rotation transmitted to the counter shaft 31 is transmitted to the threshing drum drive shaft 40 via the pulley 31B and pulley 40A. The output rotation transmitted to the threshing drum drive shaft 40 is transmitted to the rotor shaft 14 via the relay box 52 to rotate the threshing drum 11.

[0041] The output rotation transmitted to the threshing drum drive shaft 40 is transmitted to the elevator drive shaft 34 via a pulley (referred to as the "second pulley" in the claims) 40B and a reaping clutch 64 to drive the pre-reaping treatment device 3 such as the feeder house 3D. The forward rotation drive of the pre-reaping treatment device 3 is not output from the counter shaft 31. This makes it possible to reduce the torsional moment applied to the counter shaft 31 and suppress the torsional angle generated in the counter shaft 31.

[0042] The output rotation transmitted to the counter shaft 31 is transmitted to the elevator drive shaft 34 via a pulley (the "third pulley" in the claims) 31D and a reaping reverse clutch 65 to drive the pre-reaping treatment device 3 such as the feeder house 3D in a reverse direction opposite to the normal drive direction. As a result, when the pre-reaping treatment device 3, particularly the feeder house 3D, becomes clogged with stalks, the reaping clutch 64 can be released and the reaping reverse clutch 65 can be connected to drive the elevator etc. in the reverse direction to remove the stalks clogged in the feeder house 3D.

[0043] The output rotation transmitted to the counter shaft 31 is transmitted via pulley ("first pulley" in the claims) 31E to the winnower 25 to drive the winnower 25, and is transmitted via pulley 31C to the first spiral 27, the second spiral 28, and the oscillating sorting device 21 to drive the first spiral 27, the second spiral 28, and the oscillating sorting device 21. Since the winnower 25, the first spiral 27, and the second spiral 28 are driven from the counter shaft 31 via a belt once, this makes it possible to suppress the vibrations generated in the oscillating sorting device 21, etc. from being transmitted to the counter shaft 31.

[0044] The output rotation of the engine E is transmitted to the discharge auger 8 via an auger clutch 67 provided on the downstream side of the transmission path, thereby driving the discharge auger 8. [Explanation of symbols]

[0045] 1 Aircraft frame 3. Pre-harvest processing equipment 3A Conveyor 3B Cutting blade device 3C Auger Equipment 3D Feeder House 4. Threshing Equipment 11 Handling body 25 Karakinou 30L vertical frame 30R vertical frame 31 Counter shaft 31D Pulley (3rd pulley) 31E Pulley (1st pulley) 34 Elevator drive shaft (first drive shaft) 40 Throwing drum drive shaft (second drive shaft) 40B Pulley (2nd pulley) E-Engine

Claims

1. A combine harvester is provided with a pre-harvesting device (3) for harvesting stalks in front of a machine frame (1) on which an engine (E) is mounted, and a threshing device (4) for threshing and sorting the stalks is provided behind the pre-harvesting device (3). A pair of left and right vertical frames (30L, 30R) extending upward from the body frame (1) are provided at the front of the threshing device (4), A countershaft (31) extending in the left-right direction and through which the output rotation of the engine (E) is transmitted is rotatably fixed to the front surface of the vertical frames (30L, 30R).

2. A combine harvester as described in claim 1, wherein the output rotation transmitted to the counter shaft (31) is transmitted to a winnowing machine (25) that blows sorting air for the threshing device (4) via a first pulley (31E) supported on the counter shaft (31).

3. The pre-harvesting treatment device (3) is formed of a conveying device (3A) that conveys the culms rearward while standing them up, a cutting blade device (3B) that cuts the base of the culms, an auger device (3C) that gathers the conveyed culms to the left side, and a feeder house (3D) that conveys the gathered culms to a threshing device (4), 3. The combine harvester according to claim 1 or 2, further comprising a first drive shaft (34) extending in the left-right direction and adapted to transmit output rotation to the feeder house (3D) above the counter shaft (31).

4. 4. The combine harvester according to claim 3, wherein the counter shaft (31) is disposed rearward of the first drive shaft (34) and forward of the vertical frames (30L, 30R) in a side view.

5. A combine harvester according to claim 3, further comprising a second drive shaft (40) extending in the left-right direction and adapted to transmit output rotation to a threshing drum (11) of the threshing device (4) above the first drive shaft (34).

6. 6. The combine harvester according to claim 5, wherein the counter shaft (31) is disposed rearward of the first drive shaft (34) and rearward of the second drive shaft (40) in a side view.

7. The output rotation transmitted to the second drive shaft (40) is transmitted to the first drive shaft (34) via a second pulley (40B) and a harvesting clutch (64); The output rotation transmitted to the counter shaft (31) is transmitted to the first drive shaft (34) via a third pulley (31D) and a mowing reverse clutch (65); 7. A combine harvester according to claim 6, wherein when the mowing clutch (64) is engaged, the mowing reverse clutch (65) is disengaged, and when the mowing clutch (64) is disengaged, the mowing reverse clutch (65) is engaged.

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