JP7529009B2 - Threshing machine threshing drum - Google Patents

Description

The present invention relates to a threshing drum of a threshing device.

A technology has been proposed in which a drum with a hexagonal cross section in the left-right direction is mounted on multiple circular plates arranged at a specified interval in the front-rear direction on the rotation axis of the handling drum, and a bar frame extending in the front-rear direction with multiple handling teeth erected at a specified interval in the circumferential direction on the outer periphery of the drum is mounted on the multiple circular plates.

JP 2016-187327 A

However, with the technology of Patent Document 1, when a large amount of stalks were transported, there was a risk that the stalks would become trapped on the outer periphery of the drum, reducing the threshing performance of the stalks and the performance of sending the stalks backwards.

The main objective of the present invention is to propose a threshing drum for a threshing device that has excellent threshing performance and rearward feeding performance for the stumps.

The present invention, which solves the above problems, is as follows:

That is, the invention described in claim 1 provides a circular first plate (41) at the front of a rotating shaft (30) extending in the front-rear direction, a circular second plate (36) at the rear of the rotating shaft (30), and a bar frame (50), an upper front-rear frame (55), and a lower front-rear frame (56) extending in the front-rear direction at a predetermined interval in the circumferential direction are provided on the outer periphery of a front plate (53) provided on the rear surface of the first plate (41) and on the outer periphery of a rear plate (54) provided on the front surface of the second plate (36) . The bar frame (50) is connected to the front plate (53) and the rear plate (54), and the upper front-rear frame The threshing drum of a threshing device is characterized in that a ring frame (52) having teeth (58) extending circumferentially and divided is provided on the bar frame (50) and the lower front and rear frames (55 and 56 ), the inner peripheral portion of the ring frame (52) is supported on the outer peripheral portion of the bar frame (50), the upper and lower ends of the divided portion of the ring frame (52) in the rotational direction are connected to the upper front and rear frames (55) and the lower front and rear frames (56), respectively, and the upper front and rear frames (55) and the lower front and rear frames (56) are connected with fastening members so that the divided portions of the ring frame (52) are connected .

According to the invention described in claim 1 , the bar frame (50) is connected to the front plate (53) and the rear plate (54), and the upstream front-rear frame (55) and the downstream front-rear frame (56) are provided with a ring frame (52) which has teeth (58) and is configured to extend circumferentially and be divided , and the inner peripheral portion of the ring frame (52) is supported on the outer peripheral portion of the bar frame (50), and the upstream and downstream ends of the divided portion of the ring frame (52) in the rotational direction are connected to the upstream front-rear frame (55) and the downstream front-rear frame (56), respectively, and the upstream front-rear frame (55) and the downstream front-rear frame (56) are connected with fastening members so that the divided portions of the ring frame (52) are connected , so that the stalks transported to the threshing drum can be efficiently threshed, and the stalks can be efficiently transported rearward.

FIG. FIG. FIG. FIG. 2 is a longitudinal cross-sectional view of the threshing device in the front-to-rear direction. FIG. FIG. FIG. 2 is a rear view of the front part of the rotor of the threshing drum. FIG. 4 is an explanatory diagram of the front and rear frames of the impeller and rollers. FIG. 2 is an explanatory diagram of the ring frame of the impeller and roller. (a) is a rear view of the ring frame, (b) is a radially expanded view, (c) is a circumferential side view of the upper front and rear frames, and (d) is a circumferential side view of the lower front and rear frames. An explanatory diagram of the teeth of the ring frame and the dust sending plate of the handling drum cover. FIG. 13 is a rear view of the teeth of the ring frame. FIG. 13 is a rear view of another tooth of the ring frame. FIG. 13 is a rear view of the front part of the rotor of another threshing drum. FIG. 11 is a development view of another ring frame as viewed in the radial direction.

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 travel on the soil surface on the underside of the machine frame 1, a pre-harvesting processing device 3 that harvests the stalks in the field is provided on the front side of the machine frame 1, a thresher 4 that threshes and sorts the harvested 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.

An engine room 6 that houses the engine is provided below the control unit 5, a grain tank 7 that stores the threshed and sorted grains is provided behind the control unit 5, and a discharge auger 8 that discharges the grains to the outside is provided behind the grain tank 7.

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

As shown in FIG. 4, the threshing device 4 is composed of a handling chamber 10 for threshing the stalks and a sorting chamber 20 for sorting the threshed grains.

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 by an openable threshing drum cover 13, and a dust conveying plate 14 for guiding the stalks to the rear of the threshing chamber 10 is provided on the inner periphery of the threshing drum cover 13.

At the top of the sorting chamber 20, there is provided a oscillating sorting device 21 that sorts the grains leaking 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 that blows sorting air to the oscillating sorting device 21, a wind splitter 26 that changes the blowing direction of the sorting air behind the winnower 25, a first spiral 27 that transports grains leaking from the oscillating sorting device 21 to the grain tank 7, and a second spiral 28 that re-transports grains with attached stalks and the like that leak from the rear of the oscillating sorting device 21 to the sorting shelf at the front of the oscillating sorting device 21.

As shown in Figures 5 and 6, the handling drum 11 is formed from a rotating shaft 30 that is rotatably mounted on the front and rear walls of the handling chamber 10, and a truncated cone-shaped impeller 31 and rotor 32 that are supported at the front of the rotating shaft 30.

The impeller 31 is formed from a circular front plate 40, a circular rear plate 41 with a larger diameter than the front plate 40, and a side plate 42 that connects the outer periphery of the front plate 40 and the rear plate 41.

A pair of upper and lower conveying spirals 43 are erected on the outer peripheral surface of the side plate 42 to convey the stalks conveyed to the front of the impeller 31 to the rear of the impeller 31. This allows the stalks conveyed to the impeller 31 to be efficiently conveyed from the front to the rear of the impeller 31 and transferred to the rotor 32.

On the front surface of the conveying spiral 43, approximately triangular reinforcing ribs 44 are provided at a predetermined angle in the circumferential direction to connect the side plate 42 and the lower front surface of the conveying spiral 43. This increases the rigidity of the conveying spiral 43 and suppresses deformation of the conveying spiral 43 due to the load applied to the conveying spiral 43 from the stalks.

The rotor 32 is divided into two parts in the front-rear direction, and is formed of rotor 32A, which is provided on the rear side of the impeller 31, and rotor 32B, which is provided on the rear side of rotor 32A. It is also possible to form the rotor 32 as a single unit without dividing it into two parts in the front-rear direction.

The rotor 32A is provided between the rear plate (the "first plate" in the claims) 41 of the impeller 31 and an intermediate plate 35 provided in the middle of the rotating shaft 30, and the rotor 32B is provided between the intermediate plate 35 of the rotating shaft 30 and the rear plate (the "second plate" in the claims) 36 of the rotating shaft 30. The intermediate plate 35 is erected on the outer peripheral surface of an intermediate support member 34 that is provided in the middle of the rotating shaft 30 in the front-rear direction and has a hexagonal vertical cross section in the left-right direction.

The rotor 32A is formed from six bar frames 50 extending in the fore-and-aft direction, three fore-and-aft frames 51 extending in the fore-and-aft direction, and a ring frame 52 supported by the fore-and-aft frames 51 at a predetermined distance in the fore-and-aft direction.

Similarly, rotor 32B is formed from six bar frames 50 extending in the fore-and-aft direction, three fore-and-aft frames 51 extending in the fore-and-aft direction, and a ring frame 52 supported by the fore-and-aft frames 51 at a predetermined distance in the fore-and-aft direction.

Since rotors 32A and 32B have the same structure, the following description will be given taking rotor 32A as an example. As shown in FIG. 7, the front part of the front-rear frame 51 of rotor 32A is attached to the rear surface of the rear plate 41 of impeller 31 via a divided plate (the "front plate" in the claims) 53 divided into three parts in the circumferential direction, and the rear part of the front-rear frame 51 is attached to the front surface of the intermediate plate 35 of the rotating shaft 30 via a divided plate (the "rear plate" in the claims) 54 divided into three parts in the circumferential direction. The arrows indicate the direction of rotation.

The outer periphery of the split plate 53 is formed in an arc shape to fit along the outer periphery of the rear plate 41, and the inner periphery of the split plate 53 has a triangular cutout with an apex angle of 120 degrees to fit along the outer periphery of the intermediate support member 34.

The split plate 53 has two circular openings 53A at a predetermined distance in the circumferential direction on its outer periphery, through which the bar frame 50 is inserted. This allows the split plate 53 and the bar frame 50 to be firmly connected, and prevents the bar frame 50 from extending outside the outer periphery of the split plate 53.

Similarly, the outer periphery of the split plate 54 is formed in an arc shape to fit along the outer periphery of the intermediate plate 35, and the inner periphery of the split plate 54 has a triangular cutout with an apex angle of 120 degrees to fit along the outer periphery of the intermediate support member 34.

The split plate 54 has two circular openings 54A at the outer periphery, spaced a predetermined distance apart in the circumferential direction, through which the bar frame 50 is inserted. This allows the split plate 54 and the bar frame 50 to be firmly connected, and prevents the bar frame 50 from extending outside the outer periphery of the split plate 54.

An upper front-rear frame 55 extending in the front-rear direction is erected on the upper part of the rotation direction of the divided plates 53 and 54, and a lower front-rear frame 56 extending in the front-rear direction is erected and connected to the lower part of the rotation direction of the divided plates 53 and 54.

The vertical cross-sectional shape in the left-right direction of the upper front-rear frame 55 is L-shaped, and the outer periphery of the upper front-rear frame 55 is formed to extend in the left-right direction in the rotational direction. The vertical cross-sectional shape in the left-right direction of the lower front-rear frame 56 is L-shaped, and the outer periphery of the lower front-rear frame 56 is formed to extend in the left-right direction in the rotational direction.

The front-rear frame 51 is formed by connecting the lower front-rear frame 56, which is installed on the lower side of the divided plate 53 and the divided plate 54, and the upper front-rear frame 55, which is installed on the upper side of the divided plate 53 and the divided plate 54 adjacent to the lower side in the rotational direction of the divided plate 53 and the divided plate 54, with fastening members such as bolts, and is formed by overlapping the inner peripheral surface of the outer periphery of the upper front-rear frame 55 with the outer peripheral surface of the lower front-rear frame 56. This makes it possible to prevent the straw from becoming entangled in the connection part between the upper front-rear frame 55 and the lower front-rear frame 56.

As shown in FIG. 8, the front portion of the outer periphery of the front-rear frame 51 is formed with a rearward upward inclination. In a side view, the front portion of the front-rear frame 51 is formed with the same inclination angle as the side plate 42 of the impeller 31, and it is preferable to form the front end portion of the front-rear frame 51 in the same position as the rear end portion of the side plate 42 of the impeller 31. This makes it possible to prevent the straw transported from the impeller 31 to the rotor 32A from becoming entangled in the front portion of the front-rear frame 51.

As shown in FIG. 9, the outer periphery of the first ring frame 52 from the front is located radially outward from the rear end of the side plate 42 of the impeller 31. This allows the height of the teeth 58 to be made shorter, and damage to the teeth 58 can be suppressed. In addition, the outer periphery of the first ring frame 52 from the front is located radially inward from the imaginary line L1 that extends the side plate 42 of the impeller 31 rearward. This prevents the straw transported from the impeller 31 to the rotor 32A from becoming entangled in the first ring frame 52 from the front.

As shown in FIG. 10, eight holes 55A for inserting the ring frame 52 are formed in the upper front-rear frame 55 at predetermined radial positions at predetermined intervals in the front-rear direction, and the inner periphery of the first hole 55A from the front side and the eighth hole 55A are formed open. In addition, three holes 55B for inserting fastening members are formed in the upper front-rear frame 55 at positions on the inner periphery side of the radial holes 55A at predetermined intervals in the front-rear direction.

Eight holes 56A are formed in the lower front-rear frame 56 at predetermined radial positions at predetermined intervals in the front-rear direction to insert the ring frame 52, and the inner periphery of the first hole 56A from the front side and the eighth hole 55A are formed with an open hole. The holes 55A and 56A are formed at the same position in the radial direction and the front-rear direction. The lower front-rear frame 56 also has three engagement parts such as weld nuts that engage fastening members at a predetermined interval in the front-rear direction at a position on the inner periphery side of the radial hole 56A. The holes 55B and the engagement parts 56B are formed at the same position in the radial direction and the front-rear direction. This allows the ring frame 52 to be easily inserted into the holes 55A of the upper front-rear frame 55 and the holes 56A of the lower front-rear frame 56, and the upper front-rear frame 55 and the lower front-rear frame 56 can be easily connected with fastening members.

In FIG. 10, the ring frames 52 and the adjacent ring frames 52 are spaced the same distance in the front-to-rear direction, but wide and narrow spaces may be alternated, and the space between the seventh ring frame 52 and the eighth ring frame 52 from the front can be made wider than the other spaces, for example, the space between the seventh ring frame 52 and the eighth ring frame 52 from the front. This allows the stalks that have entered the inner periphery between the ring frames 52 to be efficiently discharged to the outer periphery of the ring frame 52.

The ring frame 52 can be made of round steel or square steel, but it is preferable to make it of round steel. This prevents the stalks from becoming entangled in the ring frame 52.

Teeth 58 are erected on the outer periphery of the ring frame 52 at a specified interval in the circumferential direction. As shown in FIG. 11, the dust sending plate 14 extends toward the rear left side in a plan view, and the imaginary line L2 connecting the ring frame 52 and the center of the teeth 58 of the adjacent ring frame 52 intersects at an angle of 90 degrees. This allows the teeth 58 to efficiently transport the stalks along the dust sending plate 14 to the rear left side.

The teeth 58 can be formed by cutting round steel to a specified length or by punching flat steel. When punching flat steel, it is preferable to form the upper and lower parts of the teeth 58 asymmetrically in the direction of rotation as shown in Figure 12, and form a specified sweepback angle at either the upper or lower part. This makes it possible to change the mounting position of the teeth 58 depending on the type of stalk, thereby maintaining high threshing performance. The arrow indicates the direction of rotation.

When forming the teeth by punching flat steel, as shown in Figure 13, it is preferable to form the upper and lower parts of the teeth 58 asymmetrically in the direction of rotation, and to form a specified sweepback angle and an arc shape at either the upper or lower part. This makes it possible to change the mounting position of the teeth 58 depending on the type of stalk and maintain high threshing performance. The arrow indicates the direction of rotation.

<Other front and rear frames>
Next, the other front-rear frame 51 will be described. As shown in Fig. 14, an upper front-rear frame 55 extending in the front-rear direction is installed on the upper part of the divided plate 53 and the divided plate 54 in the rotation direction, and a lower front-rear frame 56 extending in the front-rear direction is installed and connected on the lower part of the divided plate 53 and the divided plate 54 in the rotation direction. The arrow indicates the rotation direction.

Two long holes 53B with long axes extending in the radial direction are formed at a predetermined interval in the circumferential direction in the proximal portion of the cutout of the dividing plate 53. This allows the dividing plate 53 to be moved radially to easily adjust the threshing performance of the stalk. In addition, two long holes 54B with long axes extending in the radial direction are formed at a predetermined interval in the circumferential direction in the proximal portion of the cutout of the dividing plate 54. This allows the dividing plate 54 to be moved radially to easily adjust the threshing performance of the stalk.

The vertical cross-sectional shape in the left-right direction of the upper front-rear frame 55 is L-shaped, and the outer periphery of the upper front-rear frame 55 is formed to extend in the downward direction in the rotation direction. In addition, the vertical cross-sectional shape in the left-right direction of the lower front-rear frame 56 is L-shaped, and the outer periphery of the lower front-rear frame 56 is formed to extend in the upward direction in the rotation direction. This makes it easier to move the split plate 53 and the split plate 54 in the radial direction.

The front-rear frame 51 is formed by connecting the lower front-rear frame 56, which is installed on the lower side of the divided plate 53 and the divided plate 54, and the upper front-rear frame 55, which is installed on the upper side of the divided plate 53 and the divided plate 54 adjacent to the lower side in the rotation direction of the divided plate 53 and the divided plate 54, with fastening members such as bolts via rectangular shims 57. This makes it possible to prevent gaps from being formed between the upper front-rear frame 55 and the lower front-rear frame 56.

<Other rotors>
Next, another rotor 32A will be described. As shown in Fig. 15, the ring frame 52A is formed by cutting the portion of the ring frame 52 where the teeth 58 are not provided. This allows the rotor 32A to be lighter. In the embodiment shown in Fig. 15, the first and second ring frames 52A from the front side are cut between the second bar frame 50 and the third bar frame 50 counting counterclockwise from the 12 o'clock direction in Fig. 7, the third and fourth ring frames 52A from the front side are cut between the sixth bar frame 50 and the first bar frame 50, the fifth and sixth ring frames 52A from the front side are cut between the second bar frame 50 and the third bar frame 50, and the seventh and eighth ring frames 52A from the front side are cut between the sixth bar frame 50 and the first bar frame 50.

30 Rotation shaft 36 Rear plate (second plate)
41 Rear plate (first plate)
50 Bar frame 51 Front and rear frames 52 Ring frame 53 Split plate (front plate)
54 Split plate (rear plate)
55 Upper front and rear frame 56 Lower front and rear frame 57 Shim 58 Tooth L2 Virtual line

Claims (1)

A first circular plate (41) is provided at the front of a rotating shaft (30) extending in the front-rear direction, and a second circular plate (36) is provided at the rear of the rotating shaft (30);
a bar frame (50), an upper front-rear frame (55), and a lower front-rear frame (56) are provided at a predetermined interval in the circumferential direction on the outer periphery of a front plate (53) provided on the rear surface of the first plate (41) and on the outer periphery of a rear plate (54) provided on the front surface of the second plate (36) ;
The bar frame (50) is connected to the front plate (53) and the rear plate (54),
A ring frame (52) having teeth (58) and extending in a circumferential direction and configured by being divided is provided on the upper front and rear frame (55) and the lower front and rear frame (56) , and an inner peripheral portion of the ring frame (52) is supported on an outer peripheral portion of the bar frame (50),
The ends of the upper and lower parts of the divided part of the ring frame (52) in the rotation direction are connected to the upper front and rear frame (55) and the lower front and rear frame (56), respectively.
The upper front and rear frames (55) and the lower front and rear frames (56) are connected with fastening members so that the divided parts of the ring frame (52) are connected.
A threshing drum of a threshing apparatus.