JP2013063050A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester with which left/right travel units 2 is evenly braked, wrong operation of the left/right travel units 2 is reduced, and braking performance of the left/right travel units 2 is enhanced.SOLUTION: The combine harvester includes a harvesting unit 3, a threshing unit 9, and a traveling chassis 1 mounted with an engine 7. The left/right travel units 2 are mounted onto the traveling chassis 1. The engine 7 actuates a travel hydraulic pump 65 and left/right travel hydraulic motors 69 are driven by the travel hydraulic pump 65, while left/right brakes are provided at each of the left/right travel hydraulic motors 69. The combine harvester also includes left/right brake levers 296 for respectively braking left/right brake mechanisms 297, and a stabilizer body 286 for braking operation which is coupled to the brake operation tool 38 via a brake wire 278. The left/right brake levers 296 are evenly pulled by the stabilizer body 286 for braking operation.

Description

  The present invention relates to a combine equipped with a reaping device for reaping uncut cereal grains in a field and a threshing apparatus for threshing grains of the harvested cereal grains.

  Conventionally, a traveling machine body having a traveling unit and a driver's seat, a reaping device having a cutting blade, a threshing device having a handling cylinder, a feeder house for supplying reaped cereals from the reaping device to the threshing device, and an engine for driving each unit And a grain sorting mechanism for sorting the threshing material of the threshing device, and a grain tank that collects the grain of the threshing device, and there is a technology for continuously harvesting and threshing the uncut cereal grains in the field (Patent Document) 1). In addition, a technique of providing a hydraulic transmission device having a traveling hydraulic pump and a traveling hydraulic motor and driving the crawler traveling device by the hydraulic transmission device is also known (see Patent Document 2).

JP 2008-263865 A JP 2005-82084 A

  In the prior art disclosed in Patent Document 1, since the engine is mounted on the front part of the traveling aircraft (below the driver's seat), the traveling hydraulic pump is located at a position near the center of the aircraft that is difficult to maintain among locations adjacent to the engine. A mission case in which these are arranged will be provided. Also in the prior art disclosed in Patent Document 2, since the traveling hydraulic pump is disposed near the center of the left and right width of the traveling machine body, the hydraulic pipe lengths between the traveling hydraulic motor and the traveling hydraulic pump provided in the left and right crawler traveling devices are equal. However, when the brake mechanism is attached to the hydraulic motor unit, the hydraulic motor unit and the brake mechanism have a complicated structure, and there is a problem that the braking performance of the left and right traveling crawlers cannot be improved. Further, there is a problem that iron powder easily accumulates in the transmission case due to gear wear or the like, and the iron powder promotes gear wear.

  Accordingly, the present invention seeks to provide an ordinary combine that has been improved by examining these current conditions.

  In order to achieve the above object, a combine according to a first aspect of the present invention includes a traveling machine body equipped with a reaping device, a threshing device, and an engine, and a left and right traveling unit is mounted on the traveling machine body, and Left and right brake levers for braking the left and right brakes respectively in a combine that operates the traveling hydraulic pump and drives the left and right traveling hydraulic motors with the traveling hydraulic pump, while the left and right traveling hydraulic motors are provided with left and right brakes, respectively, And a brake operation stabilizer body connected via a brake wire, and the left and right brake levers can be evenly pulled by the brake operation stabilizer body.

  According to a second aspect of the present invention, in the combine according to the first aspect, one end of the stabilizer body for brake operation is connected to one of the left and right brake levers, and an auxiliary operation link body is connected to the other of the left and right brake levers. The other end side of the stabilizer body for brake operation is connected via a brake, and the stabilizer body for brake operation and the auxiliary operation link body are connected by a loose fitting connecting portion.

  According to a third aspect of the present invention, in the combine according to the first aspect, a stabilizer body for operating the brake is provided so as to be movable within a predetermined range with respect to the left and right brake levers, while the left and right brake levers are provided with return springs. The left and right positioning stopper bodies are respectively provided to be pressed by the body.

  According to a fourth aspect of the present invention, in the combine according to the first aspect, a magnet for adsorbing iron powder is provided inside a transmission case in which the traveling hydraulic motor is disposed.

  According to the first aspect of the present invention, a traveling machine body equipped with a reaping device, a threshing device, and an engine is installed, and left and right traveling units are installed on the traveling machine body, and a traveling hydraulic pump is operated by the engine. The left and right traveling hydraulic motors are driven by the traveling hydraulic pump, while the left and right traveling hydraulic motors are provided with left and right brakes, respectively, and the left and right brake levers for braking the left and right brakes and the brake operation tool via the brake wires. A brake operation stabilizer body to be connected is provided, and the left and right brake levers can be pulled evenly by the brake operation stabilizer body. The malfunction of the part can be reduced, and the braking force of the left and right brakes can be properly maintained even in an inclined place. Further, the left and right brake lever mounting structure can be asymmetrical left and right, and the braking performance of the left and right traveling parts can be improved while the restriction on the left and right brake or brake lever mounting structure can be reduced.

  According to the second aspect of the present invention, one end of the brake operation stabilizer body is connected to one of the left and right brake levers, and the other of the left and right brake levers is connected to the brake operation via an auxiliary operation link body. The other end side of the stabilizer body is connected, and the stabilizer body for brake operation and the auxiliary operation link body are connected by a loose fitting connecting portion, so that the brake is applied to the left and right brake levers. By moving the stabilizer body for operation within a predetermined range, it is possible to eliminate insufficient braking due to assembly errors or wear. For example, even if the left and right brakes are worn unevenly, the left and right brake forces can be obtained evenly.

  According to a third aspect of the present invention, the left and right brake levers are provided with a stabilizer body movably within a predetermined range with respect to the left and right brake levers, and the left and right brake levers are respectively repressed by a return spring body. Therefore, the left and right brake levers can be reliably returned to the initial positions. Further, for example, in a structure in which a return spring body is provided on the stabilizer body for brake operation, a single return spring body can be shared for the left and right brake levers, which can be configured at low cost.

  According to the fourth aspect of the present invention, the magnet for attracting iron powder is provided inside the mission case in which the traveling hydraulic motor is arranged, so the iron powder in the mission case is attracted to the magnet. It is possible to reduce the wear of the gear due to the iron powder generated in the transmission case. Further, for example, in a structure in which the magnet support holder is integrally formed by molding at the bottom (upward plane portion) of the mission case, the magnet can be press-fitted into the magnet support holder from the molding die cutting direction of the mission case, The magnet can be easily fixed in the mission case. Simplification or cost reduction of the magnet support structure can be easily achieved.

It is a left view of the combine which shows 1st Embodiment of this invention. It is a right view of the combine. It is a top view of the combine. It is a drive system figure of the combine. It is a rear view of the drive part of a combine. It is the perspective view which looked at the cab from the front. It is a side view of a brake operation tool attachment part. It is the perspective view which looked at the attaching part of the brake operation tool from the front. It is the perspective view which looked at the attachment part of the brake operation tool from back. It is a hydraulic circuit diagram of a combine. It is sectional drawing of a mission case. It is a side view of a hydraulic motor attachment part. It is a top view of a hydraulic motor attachment part.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings (FIGS. 1 to 3) applied to a normal combine. 1 is a left side view of the combine, FIG. 2 is a right side view thereof, and FIG. 3 is a plan view thereof. First, the general structure of the combine will be described with reference to FIGS. In the following description, the left side in the forward direction of the traveling machine body 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side.

  As shown in FIGS. 1 to 3, the ordinary combine in the embodiment includes a traveling machine body 1 supported by a pair of left and right crawler belts 2 made of rubber crawlers as a traveling portion. At the front part of the traveling machine body 1, a reaping device 3 for capturing uncut cereal grains such as rice (or wheat, soybeans or corn) is mounted by a single-acting lifting / lowering hydraulic cylinder 4 so as to be adjustable up and down. ing.

  A driver's cab 5 on which an operator is boarded is mounted on the front of the traveling machine body 1. A Glen tank 6 for storing the grain after threshing is disposed behind the cab 5. An engine 7 as a power source is disposed behind the Glen tank 6. On the right side of the rear part of the Glen tank 6, a grain discharge auger 8 is provided so as to be able to turn. The grain in the Glen tank 6 is configured so as to be carried out, for example, to a truck bed, a container, or the like from the throat throw opening 8a at the tip of the discharge auger 8. On the other side (left side in the embodiment) of the traveling machine body 1 is mounted a threshing device 9 for threshing the harvested cereal meal supplied from the harvesting device 3. In the lower part of the threshing device 9, a grain sorting mechanism 10 for performing swing sorting and wind sorting is arranged.

  The reaping device 3 includes a feeder house 11 that communicates with a handling port 9 a at the front part of the threshing device 9, and a horizontally long bucket-like grain header 12 that is continuously provided at the front end of the feeder house 11. A scraping auger 13 is rotatably supported in the grain header 12. A take-up reel 14 with a tine bar is disposed above the front portion of the take-up auger 13. A clipper-shaped cutting blade 15 is disposed in front of the grain header 12. Left and right weed bodies 16 are provided to project from the left and right sides of the front part of the grain header 12. In addition, a feeder conveyor 17 is provided in the feeder house 11. Between the feed end of the supply conveyor 17 and the handling opening 9a, a beater cereal throwing beater 18 is provided. In addition, the lower surface part of the feeder house 11 and the front end part of the traveling machine body 1 are connected via the lifting hydraulic cylinder 4, and the reaping device 3 moves up and down by the lifting hydraulic cylinder 4.

  With the above configuration, the tip side of the uncut grain culm between the left and right weed bodies 16 is scraped by the scraping reel 14, and the heel side of the uncut grain culm is cut by the cutting blade 15, and the rotation of the scraping auger 13. By driving, the grain headers 12 are collected in the vicinity of the center of the left and right width. The whole amount of the harvested cereal meal of the grain header 12 is conveyed by the supply conveyor 17 and is configured to be put into the handling port 9a of the threshing device 9 by the beater 18. The grain header 12 is provided with a horizontal control hydraulic cylinder 19 for rotating the grain header 12 around the horizontal control fulcrum shaft 19a, and the grain header 12, The cutting blade 15 and the take-up reel 14 are supported horizontally with respect to the field scene.

  Moreover, as shown in FIGS. 1-3, the handling cylinder 21 is rotatably provided in the handling chamber of the threshing apparatus 9. As shown in FIG. A handling cylinder 21 is pivotally supported on a handling cylinder shaft 20 extended in the front-rear direction of the traveling machine body 1. On the lower side of the handling cylinder 21, a receiving net 24 that allows grains to leak is stretched. In addition, a spiral screw blade-shaped intake blade 25 projects outward in the radial direction on the outer peripheral surface of the front portion of the handling cylinder 21.

  With the above configuration, the harvested cereal mash introduced from the handling port 9 a is kneaded between the handling cylinder 21 and the receiving net 24 while being conveyed toward the rear of the traveling machine body 1 by the rotation of the handling cylinder 21 and threshing. Is done. The threshing of grains or the like smaller than the mesh of the receiving net 24 leaks from the receiving net 24. The sawdust and the like that do not leak from the receiving net 24 are discharged from the dust outlet at the rear of the threshing device 9 to the field by the conveying action of the handling cylinder 21.

  A plurality of dust feed valves (not shown) for adjusting the conveying speed of shed grains in the handling chamber are pivotally mounted on the upper side of the handling cylinder 21 so as to be rotatable. By adjusting the angle of the dust feed valve, the conveying speed (residence time) of threshing in the handling chamber can be adjusted according to the variety and properties of the harvested cereal. On the other hand, the grain sorting mechanism 10 disposed below the threshing device 9 includes a rocking sorter 26 for specific gravity sorting having a grain pan, a chaff sheave, a grain sheave, a Strollac, and the like.

  In addition, the grain sorting mechanism 10 includes a tang fan 29 that supplies sorting wind. The threshing that has been threshed by the handling cylinder 21 and leaked from the receiving net 24 is the first thing (grains) such as cereal grains by the specific gravity sorting action of the swing sorter 26 and the wind sorting action of the Kara fan 29. In addition, it is configured to be sorted into dust (such as re-sorted items) such as grain with branches and leaflets, and sawdust.

  A first conveyor mechanism 30 and a second conveyor mechanism 31 are provided on the lower side of the swing sorter 26 as the grain sorting mechanism 10. By selecting the swing sorter 26 and the tang fan 29, the first item such as the grain dropped from the swing sorter 26 is collected in the glen tank 6 by the first conveyor mechanism 30 and the cereal conveyor 32. A second thing such as a grain with a branch is returned to the sorting start end side of the swing sorting board 26 via the second conveyor mechanism 31 and the second reduction conveyor 33 and is re-sorted by the swing sorting board 26. . The sawdust and the like are configured to be discharged from the dust outlet 34 at the rear of the traveling machine body 1 to the field.

  Further, as shown in FIGS. 1 to 3 and 6, the cab 5 is provided with a control column 41 and a driver seat 42 on which an operator sits. The control column 41 (front column 41a, side column 41b) is tilted in the front-rear direction with left and right speed change levers 43 and 44 as control levers for changing the course of the traveling machine body 1 and changing the moving speed. A harvesting posture lever 45 for raising and lowering the harvesting reel 14 by raising and lowering the harvesting device 3 or tilting in the left-right direction, an accelerator lever 46 for controlling the rotation of the engine 7, and a grain for operating the grain discharge auger 8 A discharge lever 47 is arranged. A cutting clutch lever 39 for turning on and off the power transmission to the reaping device 3 and a threshing clutch lever 40 for turning on and off the power transmission to the threshing device 9 are also arranged. In addition, a guard frame 5a that an operator who sits on the driver's seat 42 grasps when standing is extended so as to surround the upper side and the left and right sides of the front column 41a. Further, a roof 49 for awning is attached to the upper side of the cab 5 via a support column 48.

  As shown in FIG. 1, left and right track frames 50 are arranged on the lower surface side of the traveling machine body 1. The track frame 50 includes a drive sprocket 51 that transmits the power of the engine 7 to the crawler belt 2, a tension roller 52 that maintains the tension of the crawler belt 2, a plurality of track rollers 53 that hold the ground side of the crawler belt 2 in a grounded state, An intermediate roller 54 that holds the non-grounding side of the crawler belt 2 is provided. The rear side of the crawler belt 2 is supported by the drive sprocket 51, the front side of the crawler belt 2 is supported by the tension roller 23, the ground side of the crawler belt 2 is supported by the track roller 53, and the non-ground side of the crawler belt 2 is supported by the intermediate roller 54 To be configured.

  Moreover, as shown in FIGS. 1-3, the bottom feed conveyor 60 arrange | positioned at the bottom part of the Glen tank 6 and the vertical feed conveyor 61 arrange | positioned at the rear part of the Glen tank 6 are provided. The left and right bottom feed conveyors 60 extend in the front-rear direction at the bottom of the grain tank 6 and convey the grains at the bottom of the grain tank 6 toward the lower end side of the vertical feed conveyor 61 provided vertically. The vertical feed conveyor 61 is extended in the vertical direction at the rear part of the grain tank 6, and conveys the grain from the upper end side of the vertical feed conveyor 61 toward the feed start end side of the grain discharge auger 8 on the right side of the grain tank 6. The grain in the Glen tank 6 is configured to be conveyed to the throat throwing port 8a at the leading end (feeding end side) of the discharge auger 8.

  The grain discharge auger 8 is supported on the upper end side of the vertical feed conveyor 61 so as to be rotatable in the vertical direction. The side of the grain discharge auger 8 that is the feed terminal side is configured to be movable up and down. In addition, it is configured such that the side of the spear throwing hole 8a can be moved around the conveyor axis of the vertical feed conveyor 61 (horizontal direction). That is, the hull throwing opening 8a side is moved to the front lower side of the traveling machine body 1, and the grain discharge auger 8 is stored in the right side of the cab 5 and the Glen tank 6 via the auger rest 8b. On the other hand, the side of the grain discharge auger 8, which is the feed terminal side, is raised, the side of the traveling machine body 1 is moved to the side or rear of the traveling machine body 1, and the side of the traveling machine body 1 is moved to the side or rear of the traveling machine body 1. The grain discharge auger 8 is made to project, the pallet throwing port 8a is made to face the truck bed or container, and the grain in the glen tank 6 is carried out to the truck bed or container.

  Next, the combine drive structure will be described with reference to FIGS. 4, 5, and 10. As shown in FIGS. 4 and 10, a pump case 66 for traveling speed change having a pair of swash plate variable left and right traveling hydraulic pumps 65 is provided. The engine 7 is mounted on the upper surface of the right rear portion of the traveling machine body 1, and the pump case 66 is disposed on the upper surface of the traveling machine body 1 on the right side of the engine 7. Also, left and right reduction gear cases 63 are provided at the rear ends of the left and right track frames 50, respectively. A traveling hydraulic motor 69 is disposed in each of the left and right reduction gear cases 63. A travel drive input shaft 64 projecting rearward from the pump case 66 and an output shaft 67 projecting rearward from the engine 7 are connected via a travel output belt 230. The engine 7 and the pump case 66 are provided on the upper surface side of the traveling machine body 1 on the rear side of the threshing device 9, and the engine 7 is disposed between the threshing device 9 and the pump case 66.

  A charge pump 68 that drives the lifting hydraulic cylinder 4 and the like of the reaping device 3 is also provided on the same axis 64 as the traveling hydraulic pump 65. Further, the working hydraulic pump 70 for operating the lifting hydraulic cylinder 4 of the reaping device 3 or the horizontal control hydraulic cylinder 19 of the reaping device 3 is provided, the working hydraulic pump 70 is disposed in the engine 7, and the traveling hydraulic pump 65 is provided. In the same manner, the charge pump 68 and the working hydraulic pump 70 are driven by the engine 7.

  With the above configuration, the drive output of the engine 7 is transmitted to the left and right traveling hydraulic pump 65 via the output shaft 67. The left and right traveling hydraulic motors 69 are individually driven by the left and right traveling hydraulic pumps 65, and the left and right crawler belts 2 are moved forward and backward by the left and right traveling hydraulic motors 69. Further, the rotational speed of the left and right traveling hydraulic motor 69 is controlled, and the rotational speed of the left and right crawler belts 2 driven by the left and right traveling hydraulic motor 69 is varied to change the moving direction (traveling path) of the traveling machine body 1 and It is configured to perform direction changes on the ground.

  That is, as shown in FIG. 10, a pair of left and right traveling hydraulic motors 69 are hydraulically connected to the left and right traveling hydraulic pumps 65 via a closed loop hydraulic circuit 261. The left and right crawler belts 2 are driven in the forward direction or the reverse direction via the drive sprocket 51 by the left and right traveling hydraulic motor 69. The operator operates the left and right shift levers 43 and 44 to adjust the angle of the output adjustment swash plate 65a (shift control) of the left and right traveling hydraulic pumps 65, respectively. The rotation direction is changed, and the left and right crawler belts 2 are driven independently of each other, so that the traveling machine body 1 moves forward or backward.

  As shown in FIGS. 4 and 5, an engine room 57 is formed by the engine room frame 56, and the engine 7 is installed in the engine room 57. A threshing input first counter shaft 71 is pivotally supported on the engine room frame 56 via a first bearing body 58. Further, a second countershaft 72 for threshing input is pivotally supported on the engine room frame 56 via the second bearing body 59. The first counter shaft 71 is connected to the output shaft 67 of the engine 7 via the work output belt 231. A second countershaft 72 is connected to the first countershaft 71 via a threshing drive belt 232. The power of the engine 7 is transmitted from the first counter shaft 71 to the second counter shaft 72 via the threshing clutch 233 also serving as a tension roller and the threshing drive belt 232. The threshing clutch 233 is controlled to be turned on and off by the operator's lever operation. Further, a second counter shaft 72 is connected to one end side (rear end side) of the barrel shaft 20 via a barrel driving belt 234. By the turning-on / off operation of the threshing clutch 233, the handling cylinder 21 is driven and controlled via the second counter shaft 72, and the cereal mash introduced from the beater 18 is continuously threshed by the handling cylinder 21. .

  Further, a cutting selection input case 73 is provided on the front wall of the threshing device 9. A cutting selection input shaft 74 is pivotally supported on the cutting selection input case 73. One end side (right end portion) of the cutting selection input shaft 74 is connected to the other end side (front end side) of the barrel 20 via a bevel gear 75. The other end side (left end portion) of the cutting selection input shaft 74 is connected to the left end portion of the beater shaft 82 on which the beater 18 is pivotally supported via the beater drive belt 238. The left end portion of the beater shaft 82 is connected to the left end portion of the hot shaft 76 supporting the hot fan 29 via a selection input belt 235. A tang shaft 76 is connected to the left end of the first conveyor shaft 77 of the first conveyor mechanism 30 and the left end of the second conveyor shaft 78 of the second conveyor mechanism 31 via a conveyor drive belt 237. . A left end portion of a second conveyor shaft 78 is connected to a left end portion of a crank-like swing drive shaft 79 pivotally supported by the rear portion of the swing sorting plate 26 via a swing sorting belt 236. The cereal conveyor 32 is driven via the first conveyor shaft 77, and the first selected grain of the first conveyor mechanism 30 is collected in the glen tank 6. In addition, the second reduction conveyor 33 is driven via the second conveyor shaft 78, and the second selected grain mixed with the sawdust from the second conveyor mechanism 31 is returned to the upper surface side of the rocking sorter 26.

  On the other hand, the left end portion of the cutting input shaft 89 on which the feed end side of the supply conveyor 17 is pivotally connected is connected to the left end portion of the beater shaft 82 via a cutting drive belt 241 and a cutting clutch 242. The right end of the cutting input shaft 89 is connected to the header drive shaft 91 provided on the grain header 12 via the header drive chain 90. A header drive shaft 91 is connected to a drive shaft 93 that supports the drive auger 13 via a drive drive chain 92. A header drive shaft 91 is connected to a reel shaft 94 that supports the take-up reel 14 via an intermediate shaft 95 and reel drive chains 96 and 97. Further, the cutting blade 15 is connected to the right end portion of the header driving shaft 91 via a cutting blade driving crank mechanism 98. By the turning-on / off operation of the mowing clutch 242, the feed conveyor 17, the auger 13, the hoisting reel 14, and the cutting blade 15 are driven and controlled so as to continuously mow the tip of the uncut grain culm in the field. It is configured.

  Further, as shown in FIG. 4, the rear end side of the bottom feed conveyor shaft 103 of the bottom feed conveyor 60 is connected to the rear end portion of the first counter shaft 71 via the grain discharge belt 244 and the grain discharge clutch 245. Let One end side of the lower mediation shaft 105 is connected to the rear end portion of the bottom feed conveyor shaft 103 via a longitudinal feed drive chain 104. The other end side of the mediation shaft 105 is connected to the lower end side of the vertical feed conveyor shaft 106 of the vertical feed conveyor 61 via a bevel gear mechanism 107. One end side of the upper intermediate shaft 109 is connected to the upper end side of the vertical feed conveyor shaft 106 via a bevel gear mechanism 108. One end side of the grain discharge shaft 111 is connected to the other end side of the upper mediation shaft 109 via the grain discharge drive chain 110. The feed start end side of the discharge auger shaft 112 of the grain discharge auger 8 is connected to the other end side of the grain discharge shaft 111 via a bevel gear mechanism 113. The bottom feed conveyor 60, the vertical feed conveyor 61, and the grain discharge auger 8 are driven and controlled by the turning-on / off operation of the grain discharge clutch 245 so that the grains in the glen tank 6 are discharged to a truck bed or a container. It is composed.

  Further, as shown in FIG. 2, front and rear grain discharge ports 221 and 222 are provided at the bottom of the Glen tank 6. Moreover, the wrinkle receiving base 223 is arrange | positioned so that insertion / extraction is possible in the traveling machine body 1 upper surface side below the grain discharge ports 221,222. An operator other than the operator of the driver's seat 42 gets on the heel support 223 with the heel support 223 supported in a horizontal working posture, and attaches a heel bag (not shown) to the heel support bar 224. The grain in the Glen tank 6 is discharged into the bag. The straw bag filled with the grain is dropped from the straw tray 223 to the field and collected.

  With the above configuration, the grains in the grain tank 6 can be discharged without interrupting the mowing and threshing operation by discharging the grains in the grain tank 6 from the grain discharge ports 221 and 222. That is, compared with the work of discharging the grain in the grain tank 6 from the grain discharge auger 8, there is almost no need to interrupt the mowing and threshing work. Work efficiency can be improved.

  Next, the hydraulic structure of the combine will be described with reference to FIG. As shown in FIG. 10, as the hydraulic actuator, the harvesting lifting hydraulic cylinder 4, the horizontal control hydraulic cylinder 19, the left and right reel lifting hydraulic cylinders 251 that support the take-up reel 14 to be lifted and lowered, and the grain An auger lifting / lowering hydraulic cylinder 252 that supports the discharge auger 8 to be movable up and down is provided. The working hydraulic pump 70 is hydraulically connected to the horizontal control hydraulic cylinder 19 via a horizontal control electromagnetic hydraulic valve 253 that is controlled by operation of the horizontal control switch 254 of the gripping posture lever 45 grip. Based on the operator's operation of the horizontal control switch 254 or the detection result of the left / right tilt sensor (not shown), the horizontal control hydraulic cylinder 19 is activated to maintain the horizontal tilt angle of the traveling machine body 1 at a horizontal or arbitrary tilt angle. To do.

  Further, the working hydraulic pump 70 is hydraulically connected to the cutting lift hydraulic cylinder 4 via the cutting lift manual hydraulic valve 255. By the operation of tilting the cutting posture lever 45 in the front-rear direction, the cutting lifting / lowering hydraulic cylinder 4 is actuated so that the operator moves the cutting device 3 up and down to an arbitrary height (for example, cutting height or non-working height). It is configured. On the other hand, the working hydraulic pump 70 is hydraulically connected to the reel lifting hydraulic cylinder 251 through the reel lifting manual hydraulic valve 256. The operation of tilting the harvesting posture lever 45 in the left-right direction actuates the reel lifting hydraulic cylinder 251 and the operator moves the take-up reel 14 up and down to an arbitrary height so as to harvest uncut grain culm on the field. doing.

  On the other hand, the working hydraulic pump 70 is hydraulically connected to the auger lifting hydraulic cylinder 252 via the auger lifting manual hydraulic valve 257. By a tilting operation of the grain discharge lever 47 in the front-rear direction, the auger lifting / lowering hydraulic cylinder 252 is operated, and the operator moves the cocoon throwing port 8a of the grain discharging auger 8 up and down to an arbitrary height. In addition, the grain discharge auger 8 is rotated in the horizontal direction by an electric motor (not shown), and the cocoon throwing port 8a is moved in the horizontal direction. In other words, the hull throwing port 8a is positioned above the truck bed or container, and the grains in the grain tank 6 are discharged into the truck bed or container.

  Further, as shown in FIG. 10, left and right traveling hydraulic motors 69 are hydraulically connected to the left and right traveling hydraulic pumps 65 via left and right closed loop hydraulic circuits 261, respectively. The left and right speed change levers 43 and 44 are connected to the output adjusting swash plate 65a of the left and right traveling hydraulic pumps 65 via a servo valve mechanism 262, respectively, and are proportional to the front and rear tilt angles of the left and right speed change levers 43 and 44. Thus, the support angle of the output adjusting swash plate 65a is changed. That is, the left and right traveling hydraulic motors 69 are respectively driven by the left and right traveling hydraulic pumps 65, and the driving force of the left and right traveling hydraulic motors 69 is transmitted to the left and right crawler belts 2 via the reduction gear mechanism 263 of the reduction gear case 63, respectively. The left and right crawler belts 2 are driven forward or backward.

  With the above configuration, by tilting the left and right shift levers 43 and 44 forward, the vehicle can move straight forward in the forward direction at a vehicle speed proportional to the tilt angle of the left and right shift levers 43 and 44. By tilting the left and right speed change levers 43 and 44 toward the rear of the machine body, the left and right speed change levers 43 and 44 can be moved straight in the backward (reverse) direction at a vehicle speed proportional to the tilt angle of the left and right speed change levers 43 and 44. On the other hand, when the left and right speed change levers 43 and 44 have different inclination angles to the front of the body, or when the left and right speed change levers 43 and 44 have different inclination angles to the rear of the body, When one of the 44 is tilted forward of the aircraft and the other is tilted backward of the aircraft, the course of the traveling aircraft 1 can be corrected in the left-right direction.

  In other words, when the operation amount or the operation direction of the left and right speed change levers 43 and 44 are made different, the difference in the tilt angle of the left and right speed change levers 43 and 44 at a vehicle speed proportional to the tilt angle of the left and right speed change levers 43 and 44. The traveling machine body 1 can be swung in the left-right direction with a turning radius proportional to. The left and right closed loop hydraulic circuits 261 are connected to the high pressure oil discharge side of the charge pump 68 via the oil cooler 264 and the line filter 265 so that the hydraulic oil in the oil tank 266 is supplied to the left and right closed loop hydraulic circuits 261. It is configured. Further, as shown in FIGS. 10 and 11, a brake mechanism 297 having a brake braking lever 296 is provided on the motor shaft 295 of the traveling hydraulic motor 69. A brake mechanism 297 is actuated by operating a brake brake lever 296 to brake the motor shaft 295.

  Next, a structure for mounting the brake pedal 38 as the brake operating tool and the traveling speed change levers 43 and 44 will be described with reference to FIGS. As shown in FIGS. 7 to 9, a pedal frame 275 is erected from the cab 5, and a brake pedal 38 base end portion is pivotally supported on the pedal frame 275 via a pedal fulcrum shaft 276. One end side of the brake wire 278 is connected to the base end portion of the brake pedal 38 via the wire arm 277. Further, a pedal return spring 280 is connected to the base end portion of the brake pedal 38 via a spring arm 279. The pedal return spring 280 is configured to support the stepping portion 38a of the brake pedal 38 at the raised position. On the step floor 5 b of the driver's cab 5, a stepping portion 38 a is projected.

  As shown in FIGS. 7 to 9, the side column frame 281 forming the side column 41b includes an upper frame 281a that extends horizontally in the front-rear direction, a front column 281b that supports the front end of the upper frame 281a, It has an auxiliary column 281c erected in parallel with the front side of the column 281b, and an auxiliary upper frame 281d that connects the upper end of the column 281c to the front column 281b. The brake pedal 38 comes into contact with the lower surface of the auxiliary upper frame 281d, and the brake pedal 38 is supported at the raised position by the pedal return spring 280. Further, the parking lever 283 is rotatably supported by the auxiliary column 281c and the auxiliary upper frame 281d via the upper and lower brackets 282. When the brake pedal 38 is moved down by a stepping operation against the pedal return spring 280, the pedal hook body 283a of the parking lever 283 is locked to the brake pedal 38, and the brake pedal is resisted against the pedal return spring 280. 38 is configured to be supported in a downward movement (braking) position. A release spring 284 that supports the parking lever 283 is provided at a position where the pedal hook body 283a is not locked to the brake pedal 38.

  On the other hand, as shown in FIGS. 11 to 13, a flat brake link body 286 that connects the brake wire 278 with an intermediate portion via a brake spring 285 is provided. A brake link body 286 is provided as a stabilizer body for operating the brake mechanism 297 that evenly pulls the left and right brake levers 296. While one end of the brake spring 285 is fixed to the brake wire 278, a locking hole 286a is provided at the center of the left and right width of the brake link body 286 formed in a rectangular plate shape elongated in the left-right direction, and the brake spring is provided in the locking hole 286a. The other end side of 285 is locked. The right end side of the brake link body 286 is connected to a brake lever 296 provided on the left traveling hydraulic motor 69 via a right connection shaft body 287.

  Further, the left connecting shaft body 288 is fixed to the left end side of the brake link body 286, and an auxiliary operation link body 289 for connecting the brake link body 286 to the brake lever 296 provided on the right traveling hydraulic motor 69 is provided. . A loose fitting hole 289a as a loose fitting connecting portion is opened at the front end portion of the auxiliary operation link body 289, and the front end portion of the auxiliary operation link body 289 is fitted to the left connecting shaft body 288 via the loose fitting hole 289a. A rear end portion of the auxiliary operation link body 289 is connected to a brake lever 296 provided on the right traveling hydraulic motor 69 via a pin-shaped shaft body 290.

  That is, a left and right brake lever 296 that brakes the left and right brake mechanism 297 and a brake link body 286 (stabilizer body for brake operation) connected to the brake pedal 38 via a brake wire 278 are provided. In addition, one end side of the brake link body 286 is connected to one of the left and right brake levers 296, and the other end side of the brake link body 286 is connected to the other side of the left and right brake levers 296 via an auxiliary operation link body 289. The brake link body 286 and the auxiliary operation link body 289 are coupled by a loose fitting hole 289a, and the brake link body 286 is provided so as to be movable within a predetermined range with respect to the left and right brake lever 296. It is comprised so that 296 may be pulled equally. The left and right brake mechanism 297 is prevented from being effectively affected by an assembly error or wear, and a bending moment is prevented from being applied to the left and right brake lever 296.

  Further, as shown in FIG. 12, left and right positioning stopper bodies 292 for returning the levers are provided to respectively press the left and right brake levers with a return spring body 293 for releasing the brake. The left and right brake levers 296 are contacted and supported by the return spring bodies 293 to the left and right positioning stopper bodies 292, respectively, and the left and right positioning stopper bodies 292 are respectively supported at the brake release positions. That is, when the brake pedal 38 is stepped on, the left and right brake mechanisms 297 provided on the left and right traveling hydraulic motors 69 operate in a braking state. On the other hand, the brake mechanism 297 is released from the braking state by the return spring body 293 in a state where the stepping portion 38a of the brake pedal 38 is supported at the raised position.

  Next, as shown in FIGS. 7 to 9, a shift lever fulcrum that pivotally supports the left and right traveling shift levers 43 and 44 so as to be pivotable in the front-rear direction on the upper frame 281a of the side column frame 281 forming the side column 41b. A shaft 411 is provided. The shift lever fulcrum shaft 411 is passed through the upper frame 281a, and the middle portion of the shift lever fulcrum shaft 411 is fixed to the upper frame 281a. The base end portions of the left and right traveling shift levers 43 and 44 and the middle portions of the left and right lever operation plates 412 and 413 are rotated to the left and right ends of the shift lever fulcrum shaft 411 protruding in the left-right direction from the upper frame 281a. Support it as possible. The left shift lever 43 and the left lever operation plate 412 are fixed together. The right travel shift lever 44 and the right lever operation plate 413 are integrally fixed. The left shift lever 43 (left lever operation plate 412) and the right shift lever 44 (right lever operation plate 413) are supported by the shift lever fulcrum shaft 411 so as to rotate independently. Yes.

  Further, by providing an interlocking detent ball mechanism 414 that releasably connects the left and right lever operation plates 412 and 413, the upper end sides of the left and right lever operation plates 412 and 413 are engaged by the interlocking detent ball mechanism 414, When either one of the left and right traveling speed change levers 43 and 44 is operated, the other is operated in conjunction with an operation load equal to or less than the engaging force of the interlocking detent ball mechanism 414. When the operation load is greater than the engaging force of the interlocking detent ball mechanism 414, only one traveling speed change lever 43 or 44 on the side where the operation is performed is operated.

  Furthermore, one end sides of the left and right shift push-pull wires 415 and 416 are coupled to the lower end sides of the left and right lever operation plates 412 and 413 via the left and right wire coupling shafts 419a and 419b, respectively. The other end sides of the left and right shift push-pull wires 415 and 416 are connected to a servo valve mechanism 262 for switching the output adjusting swash plate 65a. Either one or both of the left and right traveling hydraulic pumps 65 are controlled to rotate forward by tilting the front of either one or both of the left and right traveling shift levers 43 and 44, and either one or both of the left and right crawler belts 2 are controlled. Is driven forward. On the other hand, one or both of the left and right traveling hydraulic pumps 65 are reversely controlled by a tilting operation to the rear side of either one or both of the left and right traveling shift levers 43, 44, and either one of the left and right crawler belts 2 or Both are driven backwards. In addition, the course of the traveling machine body 1 is changed by changing the amount of tilting operation of the left and right traveling speed change levers 43 and 44, and turning (U-turn) or the like on the field headland is executed.

  Left and right neutral detent ball mechanisms 417 and 418 are detachably connected to the engagement notches 412a and 413b of the left and right lever operation plates 412 and 413, respectively. Left and right neutral detent ball mechanisms 417 and 418 are provided on both sides of the upper frame 281a. When either one or both of the left and right neutral detent ball mechanisms 417 and 418 are engaged with one or both of the left and right lever operation plates 412 and 413, either one of the left and right traveling speed change levers 43 and 44 or Both are configured to be supported in a neutral position (a position where the rotation of the left and right traveling hydraulic pumps 65 is zero).

  As shown in FIGS. 7 and 8, a switch base 421 provided on the front column 281b, a reverse switch 422 provided on the switch base 421, and a reverse sensor arm 423 for operating the switch arm 422a of the reverse switch 422 are provided. A reverse sensor arm 423 is provided on the switch base 421. Further, reverse operation arms 424 are provided on the left and right lever operation plates 412 and 413, respectively. When either one or both of the left and right speed change levers 43 and 44 are operated in reverse, the reverse operation arm 424 is brought into contact with the reverse sensor arm 423 and the reverse switch 422 is operated to notify the reverse operation. ing.

  As shown in FIGS. 7 to 9, a pair of clamping plate bodies 427 that simultaneously clamp the left and right wire connecting shaft bodies 419 a and 419 b are provided. One end side of a pair of sandwiching plate bodies 427 is rotatably connected to the upper frame 281a via a pivoting plate body 428. One end side of the pair of tension links 429 is connected to the other end side of the pair of sandwiching plate bodies 427, respectively. One end of a tension rod 430 whose length is adjustable is connected to the other end of the pair of tension links 429. The pedal arm portion of the brake pedal 38 is connected to the other end side of the tension rod 430.

  With the above configuration, when one or both of the left and right traveling speed change levers 43 and 44 are operated to the forward side or the reverse side, by stepping on the brake pedal 38, the pair of tension links 429 and the tension link 429 are pulled. The other end side of the pair of sandwiching plate bodies 427 is pulled downward via the rod 430, and the pair of sandwiching plate bodies 427 is pressed against one or both of the left and right wire connecting shaft bodies 419a and 419b, and the pair of sandwiching plates The left and right wire connecting shaft bodies 419a and 419b are sandwiched by the plate body 427. That is, the traveling speed change levers 43 and 44 are returned from the forward or reverse operation position to the neutral position where the left and right traveling hydraulic pumps 65 rotate to zero. By stepping on the brake pedal 38 (braking operation of the crawler belt 2), both the left and right traveling speed change levers 43 and 44 are supported at the neutral position (position where the vehicle speed becomes zero).

  On the other hand, when the brake pedal 38 is locked to the pedal hook body 283a of the parking lever 283 and the brake pedal 38 is supported at the stepping operation position (position indicated by the phantom line in FIG. 9), the pair of sandwiching plate bodies 427 The left and right wire connecting shaft bodies 419a and 419b are sandwiched. That is, when the crawler belt 2 is braked by the brake operation of the brake pedal 38, both the left and right traveling speed change levers 43, 44 are locked at the neutral position, and the left and right traveling speed change levers 43, 44 are moved forward or backward. Shifting operation that tilts to the side is prohibited.

  Next, the structure of the left and right reduction gear cases 63 as left and right mission cases for driving the left and right crawler belts 2 will be described with reference to FIG. As shown in FIG. 11, the reduction gear case 63 includes a first housing 301, a second housing 302, and a third housing 303. The first housing 301 is bolted to one end side of the second housing 302, the third housing 303 is bolted to the other end side of the second housing 302, and an appropriate amount of lubricating oil is supplied into the reduction gear case 63 configured in a sealed structure. Put in. A traveling hydraulic motor 69 is disposed on the outer surface of the first housing 301 via an oil passage base body 304. A traveling hydraulic motor 69 is hydraulically connected to the traveling hydraulic pump 65 via an oil passage base 304 and hydraulic piping (not shown). A brake mechanism 297 having a brake lever 296 is provided on one end side of the motor shaft 295 of the traveling hydraulic motor 69. The motor shaft 295 is braked by operating the brake lever 296.

  Further, the other end side of the motor shaft 295 is inserted into the first housing 301 and the second housing 302. A reduction intermediate shaft 308 is pivotally supported on the first housing 301, the second housing 302, and the third housing 303. One end side of the reduction intermediate shaft 308 is connected to the other end side of the motor shaft 305 through a first reduction gear group 309 as the reduction gear mechanism 263. The traveling axle 310 is pivotally supported by the second housing 302 and the third housing 303. The traveling axle 310 is protruded from the third housing 303, and the drive sprocket 51 is pivotally supported on the protruding end portion of the traveling axle 310. The other end side of the reduction intermediate shaft 308 is connected to the traveling axle 310 via the second reduction gear group 311 as the reduction gear mechanism 263.

  With the above configuration, when the traveling hydraulic motor 69 is driven by the traveling hydraulic pump 65, the rotation of the motor shaft 295 is transmitted to the reduction intermediate shaft 308 through the first reduction gear group 309, and the second reduction gear group is transmitted. The rotation of the deceleration intermediate shaft 308 is transmitted to the traveling axle 310 through 311, and the crawler belt 2 is driven forward or backward by the drive sprocket 51.

  Further, as shown in FIGS. 5, 11, 12, and 13, the left traveling hydraulic motor 69 with respect to the left traveling axle 310 in the assembled state in which the reduction gear case 63 is fixed to the rear end portion of the track frame 50. Is supported diagonally forward and upward, while the right traveling hydraulic motor 69 is supported obliquely upward and backward relative to the right traveling axle 310. That is, the left and right traveling hydraulic motors 69 are supported at the same height position as the non-grounded side of the crawler belt 2, and the left traveling hydraulic motor 69 is displaced forward with respect to the traveling axle 310 to be supported by the traveling axle 310. On the other hand, the right traveling hydraulic motor 69 is displaced backward and supported.

  As a result, even if the sum of the left and right width dimensions of the two sets of left and right reduction gear cases 63 supporting the traveling hydraulic motor 69 is larger than the installation interval of the reduction gear case 63 between the left and right crawler belts 2, the left and right traveling hydraulic motors 69 have the same height. It is attached with the support position shifted back and forth at this position. The left and right brake levers 296 are disposed in the vicinity of the central portion of the left and right width of the traveling machine body 1. Further, two sets of left and right reduction gear cases 63 are supported in a gate shape in a rear view (front view). The mud in the field moves through the internal space formed in the gate shape of the left and right reduction gear cases 63, and the traveling movement resistance of the crawler belt 2 is reduced.

  Furthermore, as shown in FIG. 11, a magnet 314 for adsorbing iron powder is placed inside a reduction gear case 63 (first housing 301, second housing 302, third housing 303) as a mission case in which the traveling hydraulic motor 69 is disposed. Is provided. When the first reduction gear group 309 or the second reduction gear group 311 is worn and iron powder is generated in the reduction gear case 63, the iron powder is adsorbed by the magnet 314 and removed. A magnet support holder 315 is integrally formed on the inner surface side of the reduction gear case 63 (first housing 301, second housing 302, third housing 303).

  The magnet support holder 315 is formed in a shape that allows the magnet 314 to be press-fitted and fixed from the molding die cutting direction for molding the reduction gear case 63 (the first housing 301, the second housing 302, and the third housing 303). Further, a plurality of magnets 314 are provided via a plurality of magnet support holders 315 at the bottoms of the respective chambers of the second housing 302 and the third housing 303 or at positions where they are difficult to come off with respect to the traveling direction of the machine. . That is, the magnet support holder 315 can be integrally formed on the bottom (upward plane portion) or the vertical plane portion of the second housing 302 or the third housing 303 by die casting, and the molding die of the second housing 302 or the third housing 303 is formed. The magnet 314 can be easily assembled to the magnet support holder 315 from the extraction opening side. The magnet 314 can be easily assembled in the second housing 302 or the third housing 303 while reducing gear wear due to the iron powder generated in the second housing 302 or the third housing 303. it can.

  As shown in FIG. 1, FIG. 11 to FIG. 13, a cutting machine 3, a threshing device 9, and a traveling machine body 1 equipped with an engine 7 are provided, and a crawler belt 2 as a left and right traveling part is installed on the traveling machine body 1. The left and right traveling hydraulic motor 69 is driven by the traveling hydraulic pump 65 by the engine 7 and the left and right traveling hydraulic motor 69 is driven. A brake lever 296 and a brake link body 286 as a brake operation stabilizer body connected to a brake pedal 38 as a brake operating tool via a brake wire 278 are provided, and the left and right brake levers 296 are evenly spaced by the brake link body 286. It is configured to be towable. Therefore, the left and right crawler belts 2 can be evenly braked, the malfunction of the left and right crawler belts 2 can be reduced, and the braking force of the left and right brake mechanism 297 can be properly maintained even in an inclined place. In addition, the mounting structure of the left and right brake levers 296 can be configured asymmetrically left and right, and the braking performance of the left and right crawler belts 2 can be improved while the restriction on the mounting structure of the left and right brake mechanism 297 or the brake lever 296 can be reduced.

  11 to 13, one end of the brake link body 286 is connected to one of the left and right brake levers 296, and the other end of the brake link body 286 is connected to the other of the left and right brake levers 296 via an auxiliary operation link body 289. And the brake link body 286 and the auxiliary operation link body 289 are coupled to each other through a loose fitting hole 289a serving as a loose fitting coupling portion. Therefore, when the brake link body 286 moves within a predetermined range with respect to the left and right brake levers 296, it is possible to eliminate insufficient braking due to assembly errors or wear. For example, even if the left and right brake mechanism 297 is worn unevenly, the braking force of the left and right brake mechanism 297 can be obtained evenly.

  As shown in FIGS. 11 to 13, the left and right positioning stopper bodies are provided with a brake link body 286 that can move within a predetermined range with respect to the left and right brake levers 296, while the left and right brake levers 296 are respectively elastically pressed by return spring bodies 293. 292 is provided. Therefore, the left and right brake lever 296 can be reliably returned to the initial position (non-braking position). Further, for example, as shown by a phantom line in FIG. 13, in a structure in which a return spring body 293a similar to the return spring body 293 is directly connected to the brake link body 286, a single return spring body 293a is attached to the left and right brake lever 296. Can be configured at low cost.

  As shown in FIG. 11, a magnet 314 for adsorbing iron powder is provided inside a reduction gear case 63 as a transmission case in which the traveling hydraulic motor 69 is disposed. Therefore, the iron powder in the reduction gear case 63 can be removed by being attracted to the magnet 314, and the wear of the gear due to the iron powder generated in the reduction gear case 63 can be reduced. Further, for example, in the structure in which the magnet support holder 315 is integrally formed on the bottom portion (upward plane portion) of the reduction gear case 63 by molding, the magnet 314 can be press-fitted into the magnet support holder 315 from the mold release direction of the reduction gear case 63. The magnet 314 can be easily fixed in the reduction gear case 63. The magnet 314 support structure can be simplified or reduced in cost.

1 traveling body 2 crawler track (traveling section)
3 Cutting device 7 Engine 9 Threshing device 38 Brake pedal (brake operating tool)
63 Reduction gear case (mission case)
65 Traveling hydraulic pump 69 Traveling hydraulic motor 278 Brake wire 285 Brake spring 286 Brake link body (stabilizer body for brake operation)
289 Auxiliary operation link body 289a Free fitting hole (free fitting coupling part)
292 Positioning stopper body 293 Return spring body 296 Brake lever 297 Brake mechanism 314 Magnet

Claims (4)

A ripening device, a threshing device, and a traveling machine body equipped with an engine are installed. In the combine that provides left and right brakes to the left and right traveling hydraulic motors,
Left and right brake levers that brake the left and right brakes, and a brake operation stabilizer body that is connected to a brake operation tool via a brake wire. The left and right brake levers can be pulled evenly by the brake operation stabilizer body. Combine that is characterized by having been configured.   One end side of the stabilizer body for brake operation is connected to one of the left and right brake levers, and the other end side of the stabilizer body for brake operations is connected to the other side of the left and right brake levers via an auxiliary operation link body, The combine according to claim 1, wherein the brake operation stabilizer body and the auxiliary operation link body are coupled to each other by a loose fitting connecting portion.   The brake operation stabilizer body is provided so as to be movable within a predetermined range with respect to the left and right brake levers, and the left and right positioning stopper bodies are provided to respectively press the left and right brake levers with return spring bodies. The combine according to claim 1. The combine according to claim 1, wherein a magnet for adsorbing iron powder is provided inside a mission case in which the traveling hydraulic motor is disposed.

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