JP2012170407A - Threshing drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threshing drum having a plurality of threshing teeth supporting rods connected to a supporting plate integrally rotatable with a rotation spindle, durable against the threshing reaction force without adding a special reinforcing member, and capable of being easily manufactured.SOLUTION: In the threshing drum, a first reinforcing rib 42 and a second reinforcing rib 43 are integrally molded with the supporting plate 39 in such a way that the first reinforcing rib 42 and the second reinforcing rib 43 are continuously juxtaposed in the radial direction of the rotation spindle 31. The first reinforcing rib 42 is formed in such a way that the shape of the cross section along the radial direction of the rotation spindle 31 swells forward in front of the rotation spindle, and that the shape as seen in the direction along a shaft center P of the rotation spindle 31 is circular around the shaft center P of the rotation spindle 31. The second reinforcing rib 43 is formed in such a way that the shape of the cross section along the radial direction of the rotation spindle 31 swells rearward from the rotation spindle and that the shape as seen in the direction along the shaft center P of the rotation spindle 31 is circular around the shaft center P of the rotation spindle 31.

Description

  The present invention includes a scraping drum portion that is connected to a front portion of a rotation support shaft so as to be integrally rotatable, a support plate that is connected to the rotation support shaft so as to be integrally rotatable, and a distributed arrangement in a circumferential direction of the support plate. The present invention also relates to a threshing drum provided with a plurality of tooth handling rods connected to the support plate.

  Conventionally, for example, Patent Document 1 discloses a threshing barrel described above. The device described in Patent Document 1 includes a scraping portion as a scraping barrel portion, a first plate, a second plate, and a third plate as support plates, and a handling barrel frame as a tooth handling support rod. The third plate is provided with a bending portion provided between the inner peripheral portion and the outer peripheral portion so that the inner peripheral portion and the outer peripheral portion are displaced in the front-rear direction of the barrel.

Japanese Patent Laying-Open No. 2008-263913 (FIG. 7)

  In the threshing barrel provided with the above-described tooth-handling support rods, the threshing treatment rod is subjected to a threshing reaction force that generates a distortion in which the tooth-handling support rods bend, and the structure between the tooth-handling support rods is open. Therefore, when a strong threshing reaction force is received, distortion of the tooth handling support rod tends to occur. When the distortion of the tooth handling support rod increases, the rotation support shaft is affected and the same bending distortion occurs in the rotation support shaft, and the twist is generated between the rotation support shaft and its support point. By adopting a support plate such as the conventional rear support plate described above, it is necessary to add reinforcing members 80 and 81 to the support plate 39 as shown in FIG. was there.

  An object of the present invention is to provide a threshing handling cylinder that can easily withstand a threshing reaction force without adding a special reinforcing member and is easy to manufacture.

According to the first aspect of the present invention, a scraping body portion connected to the front portion of the rotation support shaft so as to be integrally rotatable, a support plate connected to the rotation support shaft so as to be integrally rotatable, and a circumferential direction of the support plate. In a threshing cylinder provided with a plurality of tooth support rods arranged and connected to the support plate,
The shape of the rotary spindle in a cross section along the radial direction is a shape bulging forward of the rotary spindle, and the shape of the rotary spindle in the direction of the axis along the axial center is the rotary spindle. The first reinforcing rib formed so as to be a circle centered on the axis of the shaft, and the shape of the rotary support shaft in a cross section along the radial direction are formed to bulge toward the rear of the rotation support shaft. And a second reinforcing rib formed so that a shape of the rotating spindle in a direction along the axis of the rotating spindle is a circle centered on the axis of the rotating spindle, the first reinforcing rib and the Second reinforcing ribs are integrally formed on the support plate in a state of being arranged in a row in the radial direction of the rotation support shaft.

According to the configuration of the first invention, if the support plate is bent, the support plate is provided with the first reinforcing rib and the second reinforcing rib, and the support plate is firmly supported against the threshing reaction force on the support plate. Therefore, even if the tooth handling support rod is subjected to a relatively strong threshing reaction force, the tooth handling support rod and the rotation support shaft are not easily distorted.
Since the support plate receives the stress from the tooth handling support rod while rotating around the axis of the rotation support shaft, the direction of the stress received by the support plate from the tooth treatment support rod located on the receiving net side with respect to the rotation support shaft And the direction of the stress which a support plate receives from the tooth-receiving support rod located in the opposite side to a receiving net | network side with respect to a rotation spindle may differ. The first reinforcing rib bulges forward of the rotating spindle and the second reinforcing rib bulges rearward of the rotating spindle, so that the support plate can be used regardless of changes in the direction of stress received from the tooth handling support rod. The tooth handling support rod is firmly supported so as not to be deformed.
When the reinforcing ribs along the radial direction of the rotation support shaft are provided on the support plate by bending, it is difficult to ensure the outer peripheral shape of the support plate in a predetermined shape such as a circle due to the occurrence of distortion caused by the forming of the reinforcing ribs. According to the configuration of the first aspect of the present invention, the first and second reinforcing ribs have a circular shape centered on the axis of the rotation support shaft when viewed in the direction along the axis of the rotation support shaft. In addition, the outer peripheral shape of the support plate can be secured to a predetermined shape without bending the support plate for providing the second reinforcing rib with very high accuracy.
In addition, the first and second reinforcing ribs have a shape in which the cross section along the radial direction of the rotation support shaft bulges toward the front of the rotation support shaft or toward the rear of the rotation support shaft, and the axis of the rotation support shaft. When the tooth handling support rod receives a very strong threshing reaction force, the support plate is made of the first and second reinforcing ribs. It is possible to relieve the transmission of the load to the rotating spindle by elastic deformation at the site.

  Therefore, even when a relatively strong threshing reaction force is received, the support plate of the tooth support rod is firmly supported by the support plate, and distortion of the tooth handle support rod and the rotation support shaft and rotation failure of the threshing cylinder are unlikely to occur. Thus, the threshing process can be performed with high accuracy. Then, the first and second reinforcing ribs need only be integrally formed on the support plate, no special reinforcing member is required, and bending of the support plate for forming the first and second reinforcing ribs is relatively easy. Can be obtained cheaply.

  In the second invention, the first reinforcing rib and the second reinforcing rib are biased toward the inner peripheral side of the support plate with respect to the center of the inner peripheral side end and the outer peripheral end of the support plate in the radial direction of the support plate. It is molded in the arrangement state.

  According to the configuration of the second aspect of the invention, the support plate is elastically deformed at a portion closer to the rotating support shaft to be elastically deformed at the first and second reinforcing rib portions to alleviate the transmission of the load to the rotating support shaft. The load transmission can be effectively reduced.

  Therefore, even when receiving a strong threshing reaction force, it is possible to obtain a threshing barrel that is smoothly driven without being distorted by the rotation support shaft.

In the third aspect of the present invention, the support plate on which the first reinforcing rib and the second reinforcing rib are formed is provided at a rear end portion of the rotating support shaft,
The support in which an outer peripheral side portion of the support plate located on the outer peripheral side of the support plate from the first reinforcing rib and the second reinforcing rib is located on the inner peripheral side of the support plate from the first reinforcing rib and the second reinforcing rib. The first reinforcing rib and the second reinforcing rib are formed so as to be located on the rear side of the rotation support shaft from the inner peripheral side portion of the plate.

  According to the configuration of the third aspect of the invention, the support boss provided on the rear wall of the handling chamber so as to rotatably support the rotation support shaft extends from the rear wall to a position as close as possible to the inner peripheral side portion of the support plate. Even if it protrudes as long as possible from the rear wall, the outer peripheral side portion of the support plate can be positioned as close as possible to the rear wall.

  Therefore, for example, when the rotation support shaft is advantageously supported by the support boss as long as possible, the entanglement preventing means for preventing dust from entering between the support plate and the rear wall is provided over the outer peripheral portion and the rear wall of the support plate. It can be made compact with a relatively short length in the longitudinal direction of the trunk.

It is a side view which shows the whole combine. It is a top view which shows the whole combine. It is a vertical side view which shows a threshing apparatus. It is a side view which shows a threshing barrel. It is a VV cross-sectional arrow view of FIG. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 3. It is a vertical side view which shows a back support plate. It is a vertical front view which shows a horizontal screw conveyor. It is a vertical front view which shows a traveling apparatus. It is a vertical front view which shows the traveling apparatus provided with another implementation structure. It is a vertical front view which shows the traveling apparatus provided with the comparison structure. It is a vertical front view which shows the traveling apparatus provided with another implementation structure. It is a vertical front view which shows the traveling apparatus provided with another implementation structure. (A), (b), (c) is explanatory drawing which shows the connection structure of the 1st frame material which comprises an airframe frame, and a 2nd frame material. It is a side view which shows the whole combine provided with another implementation structure. It is a front view which shows the state with which the combine weeding implement cover provided with another implementation structure was mounted | worn. It is a perspective view which shows a weeding implement cover. It is a vertical side view of the support plate which shows a comparative structure.

Hereinafter, the case where the threshing barrel according to the present invention is installed in a combine threshing apparatus will be described with reference to the drawings.
FIG. 1 is a side view showing the entire combine. FIG. 2 is a plan view showing the entire combine. As shown in these drawings, the combine is configured to be self-propelled by a pair of left and right crawler-type traveling devices 1 and 1, and a self-propelled aircraft equipped with a riding-type driving unit 2, and a self-propelled aircraft A threshing device 4 and a grain tank 5 provided side by side on the rear side of the machine frame 3 of the machine frame 3, and a reaping portion 6 extending from the front of the threshing device 4 to the front side of the traveling machine body so as to be swingable up and down. And is configured.

This combine is for harvesting rice and wheat.
That is, the cutting unit 6 includes a feeder 10 that is connected to the front part of the threshing device 4 so as to be swingable up and down, and when the feeder 10 is swung up and down by the lifting cylinder 11, the front end of the cutting unit 6. The pair of left and right weed bodies 12, 12 located in the section are moved up and down into a descending work state where the pair of left and right weed bodies 12, 12 are lowered near the ground, and the ascending non-working state where the pair of left and right weed bodies 12, 12 are elevated from the ground. When the cutting unit 6 is in the descending work state and the traveling machine is traveling, the cutting unit 6 uses the pair of right and left weed bodies 12 and 12 to move the tip side of the planted culm to be harvested between the rotary reel 13 The cutting cereal being scraped is scraped by the clipper-shaped reaping device 15 and the chopped cereal is moved along the floor plate of the cutting frame 16 by the lateral auger 14. The harvested cereal culm that has been transported laterally in front of the feeder 10 and has reached the front of the feeder 10 is fed into the transport start end of the feeder 10 by the scraping arm 17 provided in the lateral feed auger 14. The feeder 10 conveys the harvested cereals fed to the conveyance start end along the bottom plate of the conveyance cylinder to the rear by the endless rotating conveyor 10a located inside the conveyance cylinder over the entire length from the stock to the tip. To the threshing device 4. The threshing device 4 threshs the harvested cereals that have been fed, and supplies the threshing grains that have been subjected to the dust and the sorting processing to the threshing device 7 that is positioned between the threshing device 4 and the grain tank 5. In the grain tank 5, the threshing grains are fed by the cerealing device 7, and the fed threshing grains are stored. The threshed grains stored in the grain tank 5 are carried out by the vertical screw conveyor 8 located on the rear side of the grain tank 5 and the horizontal screw conveyor 9 extending from the upper end of the vertical screw conveyor 8. ing.

The threshing apparatus 4 will be described.
FIG. 3 is a longitudinal side view showing the threshing device 4. As shown in this figure, the threshing device 4 has a threshing portion 4A having a handling chamber 21 formed in the upper portion of the threshing machine body 20 and a sorting having an oscillating sorting device 22 positioned below the handling chamber 21. And 4B.

  The threshing unit 4A includes a threshing barrel 23 provided in the handling chamber 21 so as to be rotatable around an axis P in the front-rear direction of the threshing machine body, and is fed by the feeder 10 to the insertion port 24 located at the front end of the threshing machine body 20. The harvested cereal rice cake is raked into the threshing processing unit 23B located on the rear side of the scraping drum portion 23A of the threshing drum 23 by the scraping drum portion 23A located at the front end of the threshing drum 23, and the threshing treatment portion The threshing grains that have been scraped into 23B are conveyed to the rear side of the handling chamber 21 by the threshing processing unit 23B, and threshing is performed by the threshing processing unit 23B and the receiving net 25, and the threshing grains are dropped from the receiving net 25, and threshing is performed. The waste straw is discharged from the dust feeding port 26 located at the rear of the handling chamber 21 to the lower rear of the handling chamber 21.

  The sorting unit 4B receives the threshing grains that have fallen from the receiving net 25 and the straw scraps that have fallen together with the threshing grains by the oscillating sorting device 22, and oscillating and sorting by the oscillating sorting device 22, The grain is sorted into grains and dust by wind sorting using the sorting wind supplied to the first, the first processed product is dropped onto the first screw conveyor 28, the second processed product is dropped onto the second screw conveyor 29, and dust is collected. Are discharged to the rear side of the threshing machine body 20 from the outlet 20a located at the rear of the threshing machine body 20 together with the threshing drain from the dust feeding port 26 and the sorting wind. The first screw conveyor 28 conveys the first processed product to the lateral outer side of the threshing machine body 20 and supplies it to the cerealing device 7. The second screw conveyor 29 conveys the second processed material to the lateral outside of the threshing machine body 20 and supplies it to a reduction conveying device (not shown).

The threshing barrel 23 will be described.
As shown in FIGS. 3 and 4, the threshing barrel 23 is formed by the handling cylinder drive case 30 attached to the outside of the front wall 20 b of the threshing machine body 20 that forms the handling chamber 21 and the threshing machine body 20 that forms the handling chamber 21. A rotation support shaft 31 supported rotatably around the axis P on the rear wall 20c, a scraping drum portion 23A connected to the front portion of the rotation support shaft 31 so as to be integrally rotatable, and a scraping drum portion 23A. A threshing action portion 23B having a plurality of tooth support rods 32 arranged side by side in the circumferential direction of the threshing barrel on the rear side of the threshing barrel.

  The rotation support shaft 31 is rotatable integrally with the rear end portion of the steel pipe material so as to form a circular steel pipe material constituting the main body of the rotation support shaft 31 and a connecting shaft portion 31a at the rear end portion of the rotation support shaft 31. And a connected shaft member. The connecting shaft portion 31a on the rear end side of the rotating support shaft 31 is rotatably fitted in a support boss 33 formed by attaching a bearing member to the rear wall 21c of the handling chamber 21.

  The scraping drum portion 23A includes a scraping drum 34 formed on a conical surface whose outer peripheral surface becomes smaller in diameter toward the front end portion of the scraping drum portion, and a spiral plate provided on the outer peripheral surface of the scraping drum 34 so as to be integrally rotatable. And a scraping blade 35 consisting of The rear end portion of the scraping drum 34 is connected to the outer peripheral portion of the front support plate 36 that is connected to the front portion of the rotation support shaft 31 so as to be integrally rotatable. As shown in FIGS. 4 and 5, a plurality of weight members 37 are arranged on the inner peripheral surface of the scraping drum 34 so as to be distributed at equal intervals in the circumferential direction of the scraping drum 34 so as to be integrally rotatable. It is. The weight member 37 increases the rotational inertia force of the threshing barrel 23 so as to suppress a decrease in the rotation speed due to the threshing load of the threshing barrel 23.

  The plurality of tooth handling support rods 32 constituting the threshing processing unit 23B are arranged in a distributed manner on the front part, the intermediate part, and the rear end part of the rotation support shaft 31, and are connected to the front support plate 36 so as to be integrally rotatable. And the support plate 38 in the middle portion and the outer periphery of the support plate 39 in the rear portion are connected in an arrangement that is distributed at equal intervals in the circumferential direction of the support plates 36, 38, 39. The front support plate 36, the intermediate support plate 38, and the rear support plate 39 are made of steel plates having a circular outer peripheral shape. Each tooth-supporting bar 32 is formed of a circular steel pipe material, and includes a connecting piece 32a attached to a predetermined portion of the steel pipe material, a front support plate 36, an intermediate support plate 38, and a rear support plate 39. It is connected to the front support plate 36, the intermediate support plate 38, and the rear support plate 39 by being tightened and connected by a connection bolt 40. Each tooth handling support bar 32 is provided with a tooth handling 41 made of a round bar projecting from a plurality of locations aligned in the axial direction toward the outside of the threshing barrel 23.

  As shown in FIGS. 4, 6, and 7, the first reinforcing rib 42 and the second reinforcing rib are provided on the rear support plate 39 to increase the rigidity of the rear support plate 39 so as to increase the strength of supporting the tooth handling support rod 32. 43 is provided.

  The direction of the first reinforcing rib 42 along the axis P of the rotating spindle 31 is such that the shape of the section of the rotating spindle 31 along the radial direction bulges forward. The rear support plate 39 is integrally formed with the rear support plate 39 by bending by press molding of the rear support plate 39 so as to have a circular shape centered on the axis P of the rotary support shaft 31. The direction of the second reinforcing rib 43 along the axis P of the rotating spindle 31 so that the shape of the section along the radial direction of the rotating spindle 31 bulges toward the rear of the rotating spindle The rear support plate 39 is integrally formed with the rear support plate 39 by bending by press molding of the rear support plate 39 so as to have a circular shape centered on the axis P of the rotary support shaft 31. The first reinforcing rib 42 and the second reinforcing rib 43 are formed so that the shape of the cross section along the radial direction of the rotation support shaft 31 is a curved shape convex toward the front of the rotation support shaft or toward the rear of the rotation support shaft. It is. The bulging top portions 42a, 43a of the first reinforcing rib 42 and the second reinforcing rib 43 are formed so that the shape of the section along the radial direction of the rotation support shaft 31 is an arc shape, and the bulging top of the second reinforcing rib 43 is. The arcuate radius 43r of the protruding top part 43a is formed to be larger than the arcuate radius 42r of the protruding top part 42a of the first reinforcing rib 42.

  The first reinforcing rib 42 and the second reinforcing rib 43 are in a state where the first reinforcing rib 42 is positioned on the outer peripheral side of the support plate 39 at the rear of the second reinforcing rib 43 and the inner periphery of the support plate of the first reinforcing rib 42. The rotation support shaft 31 is arranged in the radial direction in a state where the end of the second reinforcing rib 43 and the end of the support plate outer peripheral side of the second reinforcing rib 43 are connected to each other. The first reinforcing rib 42 and the second reinforcing rib 43 are biased toward the inner peripheral side of the support plate with respect to the center 39c in the support plate radial direction between the inner peripheral side end and the outer peripheral side end of the rear support plate 39. .

  That is, the first and second reinforcing ribs 42 and 43 are elastically deformed due to the strong threshing reaction force received by the tooth handling support rod 32 and relieve the load transmitted to the rotating spindle 31. It is elastically deformed at a position as close as possible to effectively relieve load transmission to the rotating support shaft 31.

  The outer peripheral side portion 39A of the rear support plate 39 positioned on the outer peripheral side of the support plate with respect to the first reinforcing rib 42 and the second reinforcing rib 43 is positioned on the inner peripheral side of the support plate with respect to the first reinforcing rib 42 and the second reinforcing rib 43. The first reinforcing ribs 42 and the second reinforcing ribs 43 are formed so as to be located on the rear side of the rotation support shaft from the inner peripheral side portion 39B of the rear support plate 39.

  That is, the distance between the inner peripheral portion 39B of the rear support plate 39 and the rear wall 20c is maximized, and the portion of the support boss 33 that extends from the rear wall 20c toward the rear support plate 39 is extended. Threshing machine front-rear direction of entanglement prevention means 50 provided across the threshing barrel 23 and the rear wall 20c while minimizing the distance between the outer peripheral side portion 39A of the rear support plate 39 and the rear wall 20c while making the length as long as possible. The length at is shortened as much as possible.

  The threshing barrel 23 forms an internal space that communicates with the handling chamber 21 therein, and while stirring the processed material around the threshing barrel 23 and the processed material that has entered the internal space, the threshing barrel 22 and the handling rod 32 are handled. Although the handling process by the hit | damage of the tooth | gear 41 will be given, the flow of the processed material which entered into the internal space of the threshing barrel 23 is formed by forming the 1st reinforcement rib 42 and the 2nd reinforcement rib 43 as mentioned above. It can be reinforced while preventing obstruction or hindering movement of the processed material from the internal space to the handling chamber 21.

  As shown in FIG. 7, the entanglement preventing means 50 includes an annular entanglement piece 51 on the handling cylinder side which is provided at the rear end portion of the threshing treatment cylinder 23 so as to be integrally rotatable, and an inside of the entanglement prevention piece 51 on the handling cylinder side. And an annular entanglement piece 52 on the airframe side which is arranged so as to enter with a slight gap from the wrapping prevention piece 51 on the handling cylinder side and is fixed to the inner surface side of the rear wall 20c. The handling cylinder side wrap-in preventing piece 51 is constituted by a bent end portion provided on the outer peripheral side of the rear support plate 39 over the entire periphery of the rear support plate 39.

  FIG. 8 is a longitudinal front view showing the horizontal screw conveyor 9. As shown in this figure, the conveying cylinder 9a constituting the horizontal screw conveyor 9 is constituted by a bent sheet metal formed into a cylindrical shape by a roll forming machine, and the production cost of the horizontal screw conveyor 9 is reduced by adopting a seamless steel pipe. It is cheap. Both ends of the sheet metal in the bending direction are connected by welding. The conveyance cylinder 9a is assembled in an assembling posture located at the upper end portion of the conveyance cylinder 9a so that the welding location 9b is difficult to touch the conveyance grains.

  FIG. 9 is a longitudinal front view showing the traveling device 1. As shown in this figure, a cored bar 56 embedded in a rubber crawler belt 55 is provided with a cored bar projection 56 a that projects from the crawler belt 55 toward the inner peripheral side thereof. The grounding wheel 57 is positioned on the outer side of the machine body laterally with respect to the core metal engaging recess 57a in which the core metal protrusion 56a is engaged, and on the inner side of the machine body with respect to the core metal engaging recess 57a. The inner ring body portion 59 is provided. The cored bar engaging recess 57a is grounded so that the lateral width of the outer periphery of the annular body supporting the crawler belt 55 of the inner annular body 59 is larger than the lateral width of the outer annular body 58. It is biased to the laterally outer side of the aircraft with respect to the center in the lateral direction of 57 aircraft.

  When the weight of the traveling machine body increases due to the weight of the threshing grains stored in the grain tank 5, the support shaft of the grounding wheel 57 is deformed by the distortion of the connecting frame 61 that couples the machine frame 3 and the truck frame 60 of the traveling machine body. In some cases, 62 may be inclined outwardly so as to be located at a higher arrangement height on the lateral outer side of the aircraft than the ground. As shown in FIG. 11, in the case of a grounded ring body 57 in which the lateral width of the outer ring body portion 58 and the inner ring body portion 59 is the same or substantially the same as the lateral width of the vehicle body, the support shaft 62 is inclined upward. In this state, the grounding load applied to the grounding wheel 57 is distributed to the outer ring body portion 58 and the inner ring body portion 59, and the corner portions of the outer ring body portion 58 and the inner ring body portion 59 on the cored bar engagement concave portion side. Early damage to the crawler belt 55 due to the biting of the 58a and 59a into the crawler belt 55 is likely to occur. On the other hand, as shown in FIG. 9, even when the support shaft 62 is inclined upward and outward, the grounding load applied to the grounding wheel 57 is dispersed and continuously distributed on the wide peripheral surface portion of the inner ring body portion 59. As a result, strong biting into the crawler belt 55 by the corner portion 59a of the inner ring body portion 59 on the core metal engaging recess side and the opposite corner portion 59b is suppressed.

  FIG. 10 is a longitudinal sectional front view showing the traveling device 1 having another embodiment structure. As shown in this figure, in the traveling device 1 having another embodiment structure, the grounding wheel 57 is an outer wheel positioned on the laterally outer side of the machine body with respect to the cored bar engaging recess 57a in which the cored bar protrusion 56a is engaged. A body part 58 and an inner ring body part 59 located on the inner side of the machine body with respect to the cored bar engaging recess 57a are provided. The cored bar engaging recess 57a is grounded so that the lateral width of the outer periphery of the outer ring body 58 that supports the crawler belt 55 is greater than the lateral width of the inner ring body 59. It is arranged so as to be biased inward of the fuselage with respect to the center of 57 in the lateral direction of the fuselage.

  Therefore, as shown in FIG. 10, even when the support shaft 62 is inclined upward and outward, the grounding load applied to the grounding wheel 57 is dispersed and continuously distributed on the wide peripheral surface portion of the outer ring body 58. As a result, strong biting into the crawler belt 55 by the corner portion 58a of the outer ring body portion 58 on the cored bar engaging recess side and the opposite corner portion 58b is suppressed.

  FIG. 12 is a longitudinal sectional front view showing the traveling device 1 having still another embodiment structure. As shown in this figure, in the traveling device 1 having still another embodiment structure, the grounding wheel 57 is located on the outer side located laterally outside the machine body with respect to the cored bar engaging recess 57a in which the cored bar protrusion 56a is engaged. A ring body portion 58 and an inner ring body portion 59 located on the inner side of the machine body with respect to the core metal engaging recess 57a are provided. The inner ring body portion 59 is externally fitted to the boss portion 57b with a mounting hole 59a larger than the outer diameter of the boss portion 57b so as to be tilted with respect to the boss portion 57b according to the magnitude of the received ground load. Is supported by the boss portion 57b via a cushion rubber 63 as an example.

  Accordingly, as shown in FIG. 12, even when the support shaft 62 is inclined outwardly, the inclination of the support shaft 62 is absorbed by the cushion rubber 63 and the inner ring body portion 59 tilts with respect to the support shaft 62. The grounding load is dispersed and uniformly applied to the peripheral surface portion of the inner ring body portion 59, and strong biting of the corner portion of the inner ring body portion 59 with respect to the crawler belt 55 is suppressed.

  FIG. 13 is a longitudinal sectional front view showing the traveling device 1 having still another embodiment structure. As shown in this figure, in the traveling device 1 having still another embodiment structure, the grounding wheel 57 includes an inner ring body portion 59 positioned on the inner side of the machine body with respect to the core metal engaging recess 57a, and a core metal. The outer ring body portion 58 is located on the laterally outer side of the machine body with respect to the engaging recess 57a. The grounded rolling element 57 is configured to be supported by the support shaft 62 via a pair of bearings 64, 64, and the center between the bearings of the support shaft 62 is in the lateral direction of the boss portion 57 b of the grounding wheel body 57. A pair of bearings 64, 64 are arranged so as to be biased laterally outward from the center of the machine. By receiving a grounding load greater than a set load between a proximal end side portion 62a connected to the track frame 60 of the support shaft 62 and a distal end side portion 62b to which the pair of bearings 64, 64 are attached, the flexible deformation is possible. A structure portion 62c is provided.

  Therefore, as shown in FIG. 13, when an increase in the weight of the traveling machine body due to the weight of the threshing grains stored in the grain tank 5 occurs, the connection frame 61 of the traveling machine body 3 and the track frame 60 are connected. Even if the base end side portion 62a of the support shaft 62 is inclined so as to be located at a higher arrangement height with respect to the ground as the outer side of the airframe is increased due to distortion, the flexible structure portion of the support shaft 62 Due to the deformation of 62c, the distal end side portion 62b of the support shaft 62 becomes horizontal or substantially horizontal, and the ground load is uniformly distributed and applied to the peripheral surface portions of the inner ring body portion 59 and the outer ring body portion 58, so that the inner ring body portion 59 is applied. In addition, strong biting of the corner portions 59a and 58a of the outer ring body portion 58 with respect to the crawler belt 55 is suppressed, and early damage due to biting of the corner portions 59a and 58a of the crawler belt 55 does not occur.

  FIG. 14 is an explanatory view showing a connecting structure of the first frame material 66 and the second frame material 67 constituting the machine body frame 3 of the traveling machine body. In the connection structure shown in FIGS. 14A, 14B, and 14C, the first frame material 66 made of a sheet metal material and the second frame material 67 made of a sheet metal material are connected by welding, and in the direction indicated by the arrow. Even when a load W is applied, it is difficult for stress concentration to occur in the welded portion 68 that connects the first frame material 66 and the second frame material 67.

  That is, in the connection structure shown in FIG. 14A, the set location 67p is set so that the set location 67p of the second frame material 67 slightly away from the weld location 68 is more likely to generate stress concentration than the weld location 68. On the other hand, the size H1 in the direction along the first frame material 66 of the portion of the second frame material 67 located on the side opposite to the welding location 68 is set between the welding location 68 and the setting location 67p. The size of the portion of the two frame material 67 is set smaller than the size H2 in the direction along the first frame material 66. That is, the rigidity at the set point 67p is set lower than the rigidity at the welded point 68.

  In the connection structure shown in FIG. 14B, the second frame material 67 is set such that the setting position 67 p of the second frame material 67 slightly separated from the welding position 68 is a position where stress concentration is more likely to occur than the welding position 68. The second frame material 67 is provided with a notch 69 that makes the rigidity at the set point 67p lower than the rigidity at the welded point 68.

  In the connection structure shown in FIG. 14C, the second frame material 67 is set such that the setting position 67 p of the second frame material 67 slightly separated from the welding position 68 is a position where stress concentration is more likely to occur than the welding position 68. The second frame member 67 is provided with a through hole 70 that makes the rigidity at the set point 67p lower than the rigidity at the welded point 68.

  FIG. 15 is a side view showing the entire combine having another embodiment structure. As shown in this figure, in the combine having another implementation structure, the weed cutting tool 75 and the pulling device 76 acting on the six cultivated cereal culm, and the chopped cereal from the reaping device 77 are directed toward the rear of the aircraft. A feeding device 78 that is transported and supplied to the threshing feed chain 4a is provided in the reaping unit 6, and the stocker side of the harvested cereal cocoon is sandwiched and conveyed by the threshing feed chain 4a, and the tip side of the chopped cereal meal being conveyed is handled in the handling chamber. Is provided with a threshing device 4 for supplying to the threshing unit. This combine is equipped with a removable weeding tool cover 79 that covers the tip of the weeding tool 75.

  FIG. 17 is a perspective view showing the weeding tool cover 79. As shown in the figure, the weeding tool cover 79 includes a bottom plate portion 79a that is long in the horizontal direction of the machine body, and an upper plate portion 79b that is long in the horizontal direction of the machine body and extends upward from the front end of the bottom plate portion 79a. It is configured. The weeding tool cover 79 is integrally formed by extrusion molding of an aluminum alloy material.

  FIG. 16 is a front view showing the cutting unit 6 with the weeding tool cover 79 attached. As shown in this figure and FIG. 15, the weeding implement cover 79 is mounted over all the weeding implements 75 so that the tip of each weeding implement 75 enters between the bottom plate portion 79 a and the upper plate portion 79 b. It will be in use condition.

[Another Example]
(1) In the above-described embodiment, the example in which the first reinforcing rib 42 and the second reinforcing rib 43 are formed so that the shape of the cross section along the radial direction of the rotation support shaft 31 is a curved shape is shown. You may form so that the shape in the cross section along the radial direction of the rotation spindle 31 may be bent. In addition, one of the first reinforcing rib 42 and the second reinforcing rib 43 is formed so that the cross section along the radial direction of the rotation support shaft 31 is a curved shape, and the other is formed in the radial direction of the rotation support shaft 31. It may be formed and formed so that the shape in the cross section along the line becomes a bent shape.

(2) In the above-described embodiment, the example in which the first reinforcing rib 42 is positioned outside the second reinforcing rib 43 in the radial direction of the support plate 39 at the rear portion is shown, but the first reinforcing rib 42 is the second reinforcing rib 42. You may implement by employ | adopting the structure located inside the radial direction of the support plate 39 of the rear part rather than the reinforcement rib 43. FIG.

(3) In the above-described embodiment, the first reinforcing rib 42 and the second reinforcing rib 43 are arranged with respect to the center 39c in the radial direction of the support plate 39 between the inner peripheral side end and the outer peripheral side end of the rear support plate 39. In this example, the inner side of the support plate is biased toward the inner peripheral side of the support plate. However, the outer periphery of the support plate with respect to the center 39c in the radial direction of the support plate 39 between the inner peripheral side end and the outer peripheral side end of the rear support plate 39 is shown. Or a configuration in which one of the first reinforcing rib 42 and the second reinforcing rib 43 is positioned at the center 39c in the radial direction between the inner peripheral end and the outer peripheral end of the rear support plate 39. May be adopted. The same applies when the first reinforcing rib 42 and the second reinforcing rib 43 are provided on the front support plate 36.

(4) In the above-described embodiment, the example in which the outer peripheral side portion 39A of the rear support plate 39 is located on the rear side of the rotation support shaft from the inner peripheral side portion 39B is shown, but the outer peripheral side portion 39A is the inner peripheral side portion 39B. The position of the rotation support shaft 31 on the front side of the rotation support shaft or the position of the outer peripheral side portion 39A in the axial center direction of the rotation support shaft 31 and the position of the inner peripheral side portion 39B of the rotation support shaft 31 in the axial center direction are the same. You may implement by employ | adopting the structure which becomes.

(5) In the above-described embodiment, the first reinforcing rib 42 and the second reinforcing rib 43 are provided on the rear support plate 39 and not provided on the front support plate 36 and the intermediate support plate 38. Provided on the front support plate 36 and not on the intermediate and rear support plates 38, 39, or provided on the intermediate support plate 38 and provided on the front and rear support plates 36, 39. Or provided on two support plates of the front support plate 36, the intermediate support plate 38, and the rear support plate 39, without being provided on the remaining support plate, or on the front support plate 36. The present invention may be carried out by providing all of the support plates 36, the intermediate support plate 38, and the rear support plate 39.

  INDUSTRIAL APPLICABILITY The present invention can be used for a threshing barrel provided in a stationary threshing apparatus in addition to a self-decomposing combine threshing apparatus.

23A Scratching body 31 Rotating support shaft 32 Teeth handle support rod 39 Support plate 39A Outer peripheral side portion 39B Inner peripheral side portion 39c Center 42 First reinforcing rib 43 Second reinforcing rib P Shaft core

Claims (3)

A scraping body coupled to the front portion of the rotation support shaft so as to be integrally rotatable, a support plate connected to the rotation support shaft so as to be integrally rotatable, and distributed in the circumferential direction of the support plate. A threshing barrel comprising a plurality of tooth support rods connected to each other,
The shape of the rotary spindle in a cross section along the radial direction is a shape bulging forward of the rotary spindle, and the shape of the rotary spindle in the direction of the axis along the axial center is the rotary spindle. The first reinforcing rib formed so as to be a circle centered on the axis of the shaft, and the shape of the rotary support shaft in a cross section along the radial direction are formed to bulge toward the rear of the rotation support shaft. And a second reinforcing rib formed so that a shape of the rotating spindle in a direction along the axis of the rotating spindle is a circle centered on the axis of the rotating spindle, the first reinforcing rib and the A threshing barrel in which second support ribs are integrally formed on the support plate in a state where the second reinforcement ribs are arranged in a row in the radial direction of the rotation support shaft.   The first reinforcing rib and the second reinforcing rib are formed in an arrangement state in which the first reinforcing rib and the second reinforcing rib are biased toward the inner peripheral side of the support plate with respect to the center of the inner peripheral side end and the outer peripheral side end of the support plate in the radial direction of the support plate. The threshing barrel according to claim 1. The support plate on which the first reinforcing rib and the second reinforcing rib are formed is provided at a rear end portion of the rotating support shaft,
The support in which an outer peripheral side portion of the support plate located on the outer peripheral side of the support plate from the first reinforcing rib and the second reinforcing rib is located on the inner peripheral side of the support plate from the first reinforcing rib and the second reinforcing rib. The threshing barrel according to claim 1 or 2, wherein the first reinforcing rib and the second reinforcing rib are formed so as to be positioned on the rear side of the rotation support shaft from the inner peripheral side portion of the plate.

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