JP4596310B2 - Diffusion cutter diffusion guide device - Google Patents

Description

  The present invention relates to a diffusion guide device for a waste cutter that cuts a threshed waste of a combine into a field scene and discharges it to a field scene. In a form in which a rear cover of the waste cutter can be opened and rotated rearwardly, To reduce the weight of the rear cover.

In a waste cutter, a technique is known in which an axial diffusion guide plate is attached to a cutter case and a lower front wall (see, for example, Patent Document 1).
JP-A-8-266144 (first page, FIG. 1)

  Combine harvester cutters diffuse and discharge the cut straw widely on the cut ground. However, in order to drop the cutting straw on the stock market side while guiding it closer to the tip, the discharge drop is relatively low, and a guide plate or the like is arranged in a narrow space, so the configuration is complicated, intense swinging of the aircraft, It tends to be a strong weight structure that can withstand a vibration structure.

According to the first aspect of the present invention, a diffusion guide for diffusing and guiding a cutting straw in the axial direction with a cutter shaft 2 having a plurality of cutter disks 1 arranged in the axial direction below the rear wall 4 side of the cutter case 3 of the shaft mounting. A plate 5 is provided, and a rear cover 6 is provided on the rear side of the diffusion guide plate 5 whose lower end edge can be pivoted rearward. The opening / closing shaft 9 of the rear cover 6 is located behind the lower end of the rear wall 4 of the cutter case 3. It is set as the structure of the spreading | diffusion guide apparatus of the rejecting cutter characterized by providing in the back and the space | interval 10 rear side suitably from the diffusion guide plate 5 rear edge . In the combine operation, the threshed waste is conveyed and supplied into the cutter case 3 at the rear of the machine body, cut short by the cutter disk 1 by the rotation of the cutter shaft 2, and dropped and discharged downward as a cutting straw. The cut straw is dropped while being guided toward the tip by the diffusion guide plate 5. Further, the rear side of the cutting straw dropping guide portion is guided in the open rotation posture of the rear cover 6 so that the discharging and discharging of the cutting straw can be smoothly performed over a wide area. Further, when the waste is not cut, the rear cover 6 is rotated to the front side to be in the storage posture. As described above, when cutting the waste, the rear cover 6 is pivoted to the rear side around the opening / closing shaft 9, and when the cutting operation is not performed, the rear cover 6 is pivoted to the front side to be in the storage posture. At the time of the fall diffusion of the cut straw, the cut straw falling from the cutter case 3 is guided by the respective diffusion guide plates 5 and diffused toward the tip of the waste picking head. Further, the cutting straw guided by the diffusion guide plate 5 is guided by the rear cover 6 opened rearward and widely diffused and discharged to the lower rear part. The cutting straw guided to the diffusion guide plate 5, the rear cover 6, and the like is partially formed between the rear edge of the diffusion guide plate 5 and the opening / closing shaft 9 of the rear cover 6 from the lower inner end portion of the rear wall 4 of the cutter case 3. Although it is discharged to 10 parts in the interval, it is dropped and discharged by dropping 10 parts of this distance.

Since the cutting straw discharged from the inside of the cutter case 3 is guided by the diffusion guide plate 5 directly below the rear wall 4 and the rear cover 6 below the rear side, it is diffused and dropped. Straw diffusion and discharge effect is performed accurately. Further, these diffusion guide plates 5 are fixed to the cutter case 3 side, and the rear cover 6 can be opened and rotated independently of the diffusion guide plates 5, so that the cutting straw is diffused in the axial direction and diffused and discharged to the rear side. Can be performed stably, the setting adjustment and configuration can be simplified, and the weight can be reduced. Even if the diffusion guide plate 5 is disposed below the rear wall 4 of the cutter case 3, the opening / closing shaft 9 of the rear cover 6 is configured to be retracted from the lower end of the rear wall 4 to the rear side. Since a gap of 10 parts is formed between the rear edge of the rear cover 6 and the opening / closing shaft 9 of the rear cover 6, it is difficult for a part of the cutting straw to be caught between the diffusion guide plate 5 and the opening / closing rotation shaft 9. Smooth discharge and diffusion can be maintained by eliminating straw accumulation and clogging.

Based on the illustrated example, a combine threshing device 14 is mounted on a vehicle body 13 traveling on a crawler 12, and a waste chain 16 for holding and transporting the threshed waste is provided on the rear threshing dusting chamber 15. The waste chain 16 is provided in two parallel lines on the stock side and the tip side, and is provided in an oblique direction from the stock side to the rear tip side.
The waste cutter has a box-shaped cutter case 3 as a main body, and a pair of cutter shafts 2 is mounted between the left and right side walls 38 and 39 in the inside thereof, and is attached to the rear end of the threshing device 14. A configuration in which the waste supplied from the waste chain 16 is received and cut shortly above the cutter disks 1 arranged at regular intervals along the cutter shaft 2. A discharge cover 19 for discharging and guiding the cutting straw is attached to the lower side of the cutter case 3. The discharge cover 19 is connected to the lower end of the cutter case 3 at the upper end, but is formed in a substantially square cylindrical shape with the lower end open to the ground where the crawler 12 travels, and the diffusion guide plate 5 is disposed inside. A rear cover 6 that can be rotated back and forth is provided on the rear side. In addition, a rubber cover 21 is attached to the bottom side of the stock cover side of the discharge cover 19 between the side cover 20 on the stock base side and the stock part side end of the rear cover 6 so that the rear cover 6 is attached to the rear side. The rubber cover 21 is stretched downward on the tip side by opening to open, and the cutting straw falling on the stock base part is guided to flow down to the center side.

  The cutter case 3 has mounting pins 22 and hooks 23 on both the left and right sides, and is attached by fitting the mounting pins 22 to mounting bosses 24 on the rear end of the threshing device 14. The hook 23 can be engaged with the engagement pin 25 on the threshing device 14 side, and can be fixedly attached by rotating the side back and forth around the attachment pin 22. The rear end portion of the staking chain 16 is positioned on the upper side of the cutter case 3 in this mounting posture, but the staking guide rod is located at the front end of the cutter case 3 or the rear end upper part of the threshing device 14. 26 base portions 27 are provided to be rotatable in the horizontal direction. When the waste guide rod 26 rotates around the base 27 and moves up and down along the lower surface of the waste chain 16, the waste conveyed by the waste chain 16 is transferred to the cutter case. 3 is guided to the rear through 3 and is discharged and dropped, but this evacuation guide rod 26 is moved downward and rotated around the base 27 to the tip side so as to be parallel to the front edge of the cutter case 1. When the storage posture is adopted, the backward conveyance by the waste chain 16 is released, and the waste conveyed to the upper opening on the cutter case 1 is supplied to the supply port portion 28 between the front and rear cutter disks 1 to be cut by the cutter. The cutting action by the disk 1 can be received. Reference numeral 29 denotes a switching plate that is pivoted up and down around the switching shaft 30 on the supply port portion 28, and is configured to convey the waste by the rejection chain 16 between the supply port portion 28 of the cutter and the dropper side behind the cutter case 3. Is switched to. For this reason, it can be operated in conjunction with the exit / exit of the evacuation guide rod 26.

  A mounting cover 33 for attaching the rear cover 6 of the discharge cover 19 is provided at the lower end of the rear wall 4 of the cutter case 3. The mounting cover 33 hangs downward from the rear wall 4 and bends the lower end portion to the lower rear side. An upper end portion of the rear cover 6 is supported so as to be vertically rotatable around the open / close shaft 9 in the horizontal direction along the bent lower end edge. The discharge cover 19 is formed in a substantially U-shaped cross-sectional shape by the front cover 34 and the side covers 20 and 35 on both the left and right sides with the rear side surface and bottom surface of the rear cover 6 opened and closed. The rear end edge 36 of the side cover 20 on the waste stock source side and the side cover 35 on the tip side is connected by the mounting cover 33 portion at the upper end portion, but in the portion extending from the opening / closing shaft 9 portion to the lower end, It hangs down from the rear wall 4 surface. Therefore, when the rear cover 6 is rotated downward to the closed storage state A, the left and right edges of the rear cover 6 are close to or along the rear edges 36 of the side covers 20 and 35. Further, a part of a cutter frame 40 to which the rear wall 4 forming the cutter case 3 and the wall plates such as the front wall 37 and the left and right side walls 38 and 39 are attached to the inner periphery of the lower end of the cutter case 3. Is formed. The diffusion guide plate 5 is detachably attached to the cutter frame 40 along the lower edge of the rear wall 4 by bolting or the like.

  Inside the discharge cover 19, there are provided the diffusion guide plate 5, the stock guide plate 45 that guides the cutting straw on the stock portion side, the rubber cover 21 that connects the rear cover 6, and the like. It is done. Among these, the stock guide plate 45 is attached to the inner surface of the lower end of the side cover 20 and is inclined inward and downward, in particular, the cutting straw of the stock base portion falling along the inner surface of the side cover 20 is inward. Guide you down. The rubber cover 21 is attached 46 and 47 by screws or the like between the rear side edge of the side cover 20 and the inner surface of the rear cover 6. The rear cover 6 is pivoted to the rear upper part at an appropriate angular position in the waste cutting operation state B. In this state, the rubber cover 21 is stretched rearward so that the stock guide plates 45 Covering between the rear edge and the inner surface of the rear cover 6, a stock guide surface is formed by the rubber cover 21 inclined inward, and the stock base portion of the cut straw that is cut and dropped is formed on the rear cover 6. It is intended to diffuse and guide the tip side inward without scattering to the outside of the stock source side.

  The diffusion guide plate 5 is located inward of the stock guide plate 45 and is arranged in two or three. The mounting portion 7 has a mounting arm 48 at the upper end of each diffusion guide plate 5, and the mounting portion 7 of the mounting arm 48 is appropriately bent at an angle θ and is attached to the guide plate bracket 41 by bolting or the like. It is done. The diffusion guide plate 5 is set to an appropriate width in the front-rear direction and length in the vertical direction in the discharge cover 19 and tilts θ so as to guide the cut straw toward the tip. The inclination θ can be changed and adjusted by adjusting the shape of the mounting arm 48 or the mounting angle with respect to the cutter frame 40. The upper end edge 8 of each diffusion guide plate 5 is inclined from the upper mounting portion 7 toward the front lower side, and even if the cut straw falls from the upper side, it is difficult to catch and slide easily. The rear end edge of the diffusion guide plate 5 is formed so as to hang from the mounting portion 7, but the mounting cover 33 at the lower end of the rear wall 4 and the opening / closing shaft 9 of the rear cover 6 supported by the rear cover 4 are spaced apart from each other. Therefore, a part of the cutting straw to be discharged to the lower side of the rear cover 6 along the lower surface of the mounting cover 33 is connected to the rear edge of the diffusion guide plate 5. Even if it is discharged between the opening and closing shaft 9, it is guided to drop as it is at the interval 10, and it is prevented from being stuck and stagnating or becoming a resistance to the diffusion and discharge of the cutting straw, thereby enabling smooth diffusion and discharge. be able to. Reference numeral 49 denotes an opening / closing arm that opens and closes the rear cover 6, and reference numeral 50 denotes a hook that holds the rear cover 6 in the closed storage state A. Reference numeral 51 denotes a dust outlet of the dust chamber 15.

Since the attaching portion 7 of the diffusion guide plate 5 is attached to the lower end portion of the rear wall 4 of the cutter case 3, the attaching / detaching operation from the lower portion of the rear side, the maintenance operation such as the adjustment of the inclination θ angle, etc. are easily and easily performed. be able to.
In the combine operation, when discharging the threshing waste without cutting, the waste guide rod 26 is placed in the waste posture along the lower side of the waste chain 16, and the switching plate 29 is rotated downward. The supply port portion 28 is covered. The waste conveyed in the waste chain 16 is guided on the waste guide rod 26 on the cutter case 3 and discharged from the rear end of the waste chain 16 onto the dropper or directly onto the cutting ground. . Further, when the waste is diffused and discharged while being cut short by a cutter, the waste guide rod 26 is moved downward and stored along the front edge of the cutter case 3, and the switching plate 29 is raised upward. It is made to rotate and it is in the state which interrupts | blocks the waste passage part by the waste chain 16. The diffusion guide plate 6 is rotated to the rear around the opening / closing shaft 9 to be in the working state B. The waste conveyed by the waste chain 16 is guided to the supply port portion 28 by the switching plate 29 or the like on the upper side of the cutter case 3 and is in a state along the cutter shaft 2 between the front and rear cutter disks 1. Supplied in. This waste is cut short and dropped while being scraped downward by the rotational difference between the front and rear cutter disks 1. At the lower end of the cutter case 3, this cut straw is in a state where the cocoon is large on the stock side and small on the tip side, but in the state where it is guided through the discharge cover 19 and dropped on the soil surface of the cutting trace, The cut straw on the stock base side is widely discharged to the tip side and discharged to a substantially uniform layer.

  In this diffusing action of the cutting straw, most of the cutting straw dropped from the upper cutter case 3 is scattered on each diffusion guide plate 5 and guided along the inclined θ surface of the diffusion guide plate 5, The portion on the stock side is guided to the lower side of the rear cover 6 while being moved to the tip side. In particular, some of the straw that is dropped along the rear wall 4 side is guided to the upper end edge 8 of the diffusion guide plate 5, but is quickly slid down along the inclined edge of the upper end edge 8. The A part of the cutting straw that falls between the diffusion guide plates 5 is scattered and guided from the lower surface of the upper mounting cover 33 to the lower surface of the rear cover 6. Since the interval 10 is formed in between, the interval 10 parts can be dropped or diffused to the tip side to allow smooth diffusion and discharge. Further, since the diffusion guide plate 5 is attached to the cutter case 3 side independently of the rear cover 6, the structure is simple and the diffusion action of the diffusion guide plate 5 can be stabilized. Further, the single structure and the opening / closing structure of the diffusion guide plate 5 can reduce the weight, reduce the vibration and vibration during the operation, and enhance the durability.

The side view of a combine rejection cutter. The rear view.

DESCRIPTION OF SYMBOLS 1 Cutter disc 2 Cutter shaft 3 Cutter case 4 Rear wall 5 Diffusion guide plate 6 Rear cover 7 Mounting portion 8 Upper edge 9 Opening / closing axis 10 Interval

Claims (1)

A diffusion guide plate for diffusing and guiding the cutting straw in the axial direction with the cutter shaft (2) having a number of cutter disks (1) arranged in the axial direction below the rear wall (4) side of the axially mounted cutter case (3) (5) is provided, and a rear cover (6) is provided on the rear side of the diffusion guide plate (5), the lower end edge of which can be pivoted backward, and the opening / closing shaft (9) of the rear cover (6) is attached to the cutter case. (3) A rear guide (4) is provided behind the lower end, and is provided on the rear side of the diffusion guide plate (5) at an appropriate distance (10) from the rear edge .

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