Combine harvester

Abstract

The invention provides a combine harvester capable of suppressing interference between a fuel tank and a discharge auger. A combine harvester (1) is provided with a traveling machine body (1a), a first fuel tank (200), a grain discharge auger (64), and a guard unit (400). An engine (7) is mounted on the traveling machine body (1a). The first fuel tank (200) is disposed in the traveling machine body (1a). The grain discharge auger (64) is configured so as to be movable above the first fuel tank (200), and discharges threshed grains. The protection unit (400) is disposed between the first fuel tank (200) and the grain discharge auger (64), and restricts contact between the first fuel tank (200) and the grain discharge auger (64).

Description

Technical Field

[0001] The present invention relates to a combine harvester. Background Art

[0002] Patent Document 1 discloses a combine harvester including: a cutting unit that cuts cereal straws; a threshing unit that threshes the cut cereal straws; a grain tank that stores the threshed grains; a discharge auger that discharges the grains stored in the grain tank; and a fuel tank that is disposed behind the threshing unit. The discharge auger rotates to change the discharge direction of the threshed grains.

[0003] Prior Art Documents

[0004] Patent Document

[0005] Patent Document 1: Specification of Chinese Patent Application Publication No. 116018928 Summary of the Invention

[0006] Regarding the combine harvester of Patent Document 1, the discharge auger is configured to be able to lift and rotate. Therefore, there is a concern that the fuel tank may interfere with the discharge auger.

[0007] An object of the present invention is to provide a combine harvester capable of suppressing interference between a fuel tank and a discharge auger.

[0008] The combine harvester according to the present invention includes a traveling body, a fuel tank, a discharge auger, and a protection unit. The fuel tank is disposed on the traveling body. The discharge auger is configured to be able to move at a position higher than the fuel tank and discharge the threshed grains. The protection unit is disposed between the fuel tank and the discharge auger and restricts contact between the fuel tank and the discharge auger.

[0009] Advantages of the Invention

[0010] According to the present invention, interference between the fuel tank and the discharge auger can be suppressed. Brief Description of the Drawings

[0011] Figure 1 is a left view of the combine harvester according to the embodiment.

[0012] Figure 2 is a right view of the combine harvester according to the embodiment.

[0013] Figure 3 is a top view of the combine harvester according to the embodiment.

[0014] Figure 4 is a rear view of the combine harvester according to the embodiment.

[0015] Figure 5 It is a left side view of the first fuel tank in the embodiment.

[0016] Figure 6 It is a right side view of the first fuel tank in the embodiment.

[0017] Figure 7 It is a perspective view of a first fuel tank according to the embodiment.

[0018] Figure 8 This is a perspective view showing the rear portion of the threshing unit after the first fuel tank according to the embodiment is removed.

[0019] Figure 9 It is a perspective view of a fuel tank according to the embodiment.

[0020] Description of Reference Numerals

[0021] 1…Combine harvester; 1a…Traveling body; 3…Harvesting section; 6…Grain tank; 7…Engine; 9…Threshing section; 23…Dust exhaust section; 64…Grain discharge auger (discharge auger); 64a…Paddy input port; 64b…Rotating shaft; 67…Rotating shaft; 116…Supporting member; 140…Pedal; 200…First fuel tank (fuel tank); 210…Fuel supply port; 221…First constriction section (constriction section); 400…Protective section; 411…Extending section; 421…Accommodated section; 200A…Box body; T…Swivel trajectory. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their description will not be repeated.

[0023] Reference Figures 1 to 9 The combine harvester 1 according to the first embodiment will be described.

[0024] First, refer to Figures 1 to 4 The basic structure of the combine harvester 1 according to the embodiment will be described. Figure 1 is a left side view of the combine harvester 1, Figure 2 It is a right side view of the combine harvester 1. Figure 3 is a top view of the combine harvester 1, Figure 4 1 is a rear view of the combine harvester 1. In the following description, the left side when facing the forward direction of the combine harvester 1 is referred to as "left", and the right side when facing the forward direction is referred to as "right".

[0025] The combine harvester 1 includes a traveling body 1a supported by a pair of left and right crawler tracks 2 made of rubber crawlers. A harvesting unit 3, which harvests uncut stalks of rice or other crops while taking them in, is connected to the front of the traveling body 1a. The harvesting unit 3 is not limited to harvesting rice; it can also harvest wheat, soybeans, corn, and other crops.

[0026] On the left side of the traveling body 1a, a threshing unit 9 for threshing the cut cereal straws supplied from the cutting unit 3 is mounted. Below the threshing unit 9, a grain screening mechanism 10 for performing swinging screening and air screening of the threshed material is arranged. On the front right side of the traveling body 1a, a driving operation unit 5 for an operator to ride on is mounted.

[0027] The traveling body 1a is equipped with an engine 7 as a power source. The engine 7 is, for example, a diesel engine. The engine 7 is arranged below the driving operation unit 5. On the right side of the traveling body 1a and behind the driving operation unit 5, a grain tank 6 is mounted. The grain tank 6 stores the grains threshed by the threshing unit 9. Above the grain tank 6 and the threshing unit 9, a grain discharge conveyor 8 is provided. The grain discharge conveyor 8 discharges the grains stored in the grain tank 6 to the outside.

[0028] The cutting unit 3 is connected to the front of the traveling body 1a and cuts the cereal straws. The cutting unit 3 includes: a feeding chamber 11 that communicates with the threshing port 9a at the front of the threshing unit 9; and a horizontally long scoop-shaped grain harvesting table 12 that is connected and provided at the front end of the feeding chamber 11. A raking auger 13 is rotatably supported by a shaft inside the grain harvesting table 12. Above the front part of the raking auger 13, a raking reel 14 is arranged. At the front of the grain harvesting table 12, a cutter 15 is provided. On the left and right sides at the front of the grain harvesting table 12, dividing bodies 16 are arranged. In addition, a supply conveyor 17 is arranged inside the feeding chamber 11. At the conveying terminal side of the supply conveyor 17, that is, the threshing port 9a side, a threshing cylinder 18 for cutting and feeding the cereal straws is provided.

[0029] The lower surface part of the feeding chamber 11 is connected to the front end part of the traveling body 1a by means of a lifting hydraulic cylinder 4. The lifting hydraulic cylinder 4 moves the cutting unit 3 up and down with the cutting input shaft 19 as the lifting fulcrum.

[0030] According to the above structure, the ear tip side of the uncut cereal straws between the left dividing body 16 and the right dividing body 16 is raked by the raking reel 14. The ear root side of the uncut cereal straws is cut by the cutter 15. By the rotational drive of the raking auger 13, the cut cereal straws cut by the cutter 15 are gathered near the feeding chamber 11 and conveyed by the supply conveyor 17. The conveyed cereal straws are fed into the threshing port 9a of the threshing unit 9 by the threshing cylinder 18 for cutting and feeding the cereal straws.

[0031] The threshing unit 9 is disposed on one side in the left-right direction of the traveling body 1a and threshes the cut cereal straws. Specifically, the threshing unit 9 is disposed on the left side of the traveling body 1a. The threshing cylinder 21 is rotatably supported by the threshing cylinder shaft 20 inside the threshing unit 9. The threshing cylinder 21 rotates by the power of the engine 7. A receiving net 24 for allowing the grains to leak out is provided below the threshing cylinder 21. On the outer peripheral surface of the front portion of the threshing cylinder 21, a spiral blade-shaped intake blade 25 is provided so as to protrude outward in the radial direction.

[0032] As described above, the cut cereal straws are put into the threshing port 9a by the threshing cylinder 18 for feeding the cut cereal straws. While the cut cereal straws are being conveyed rearward of the traveling body 1a by the rotation of the threshing cylinder 21, they are kneaded and threshed between the threshing cylinder 21 and the receiving net 24 or the like. Grains smaller than the mesh of the receiving net 24 leak out from the receiving net 24. Straw scraps and the like that do not leak out from the receiving net 24 are conveyed to the rear portion of the threshing unit 9 as the threshing cylinder 21 rotates and are discharged to the field from the dust discharging portion 23. Hereinafter, grains and the like smaller than the mesh of the receiving net 24 are sometimes referred to as threshed materials, and straw scraps and the like that do not leak out from the receiving net 24 are sometimes referred to as processed materials.

[0033] The grain screening mechanism 10 provided below the threshing cylinder 21 includes a swing screening plate 26 for specific gravity screening, a winnower 29 in the shape of a blowing fan, a first-grade product conveying mechanism 30, a second-grade product conveying mechanism 31, and the like. For the threshed materials that leak out from the receiving net 24, they are screened into grains (first-grade products such as fine grains), a mixture of grains and straws (second-grade products such as grains with branches), and straw scraps and the like by the specific gravity screening action of the swing screening plate 26 and the wind screening action of the winnower 29.

[0034] The grains (first-grade products) that fall from the swing screening plate 2 were conveyed to the grain tank 6 by the first-grade product conveying mechanism 30 and the grain elevator 32. The grain tank 6 is disposed on the other side in the left-right direction of the traveling body and stores the grains threshed by the threshing unit 9. Specifically, the grain tank 6 is disposed in the right region of the traveling body 1a.

[0035] The mixture of grains and straws (second-grade products) is returned to the area on the screening start end side of the swing screening plate 26 by means of the second-grade product conveying mechanism 31 and the second-grade product reduction conveyor 33 or the like and is screened again by the swing screening plate 26. Straw scraps and the like are discharged to the field from the dust discharging portion 23 at the rear of the traveling body 1a.

[0036] The dust discharging portion 23 discharges the processed materials after threshing. The dust discharging portion 23 is disposed behind the threshing unit 9. The rear of the dust discharging portion 23 is covered by a dust discharging portion cover 23a that is open at the front surface, the lower surface, and the lower portion of the rear surface. The dust discharging portion cover 23a guides straw scraps and the like downward.

[0037] A horizontal conveyor auger (not shown) is provided at the bottom of the grain box 6. The grain discharge conveyor 8 is connected to the rear end side area of the horizontal conveyor auger by means of a bevel gear mechanism 61. The grain discharge conveyor 8 has a longitudinal conveyor auger 62 and a grain discharge auger 64.

[0038] The longitudinal conveyor auger 62 is composed of a pipe member extending in the vertical direction. As Figure 4 shown, the longitudinal conveyor auger 62 is arranged behind the grain box 6. The base end portion of the grain discharge auger 64 is connected to the upper end side of the longitudinal conveyor auger 62 by means of a bevel gear mechanism 63. The grain discharge auger 64 corresponds to, for example, the "discharge auger".

[0039] The grain discharge auger 64 discharges the threshed grains. The grain discharge auger 64 is composed of a pipe member extending in an approximately straight line from the base end portion toward the tip end portion. The grain discharge auger 64 has a paddy input port 64a at the tip end portion. The grain discharge auger 64 is configured in an approximately L shape and discharges grains downward from the paddy input port 64a.

[0040] The grain discharge auger 64 is configured to be able to move up and down in the vertical direction by means of a hydraulic cylinder 55 for auger lifting. By operating a grain discharge lever (not shown) provided on the driving operation unit 5, the hydraulic cylinder 55 for auger lifting is actuated, whereby the paddy input port 64a of the grain discharge auger 64 is lifted to an arbitrary height. As Figure 4 shown, the paddy input port 64a moves up and down with the hydraulic cylinder 55 for auger lifting of the grain discharge auger 64 as the fulcrum O. Figure 4 The lowest limit position of the axis of the grain discharge auger 64 when the paddy input port 64a is in the lowest limit position is shown by a single-dot chain line in

[0041] The grain discharge auger 64 is supported by an electric motor 65 so as to be able to rotate. The grain discharge auger 64 is configured to be able to rotate about a rotation axis 67. The rotation axis 67 is an axis arranged behind the threshing unit 9 and extending in the vertical direction. The grain discharge auger 64 is supported in a storage posture placed on a placement table 66 provided on the front side and upper part of the threshing unit 9 when not rotated.

[0042] As Figures 2 to 4 shown, the electric motor 65 rotates the grain discharge auger 64 together with the longitudinal conveyor auger 62 and the bevel gear mechanism 63 about the rotation axis 67. The electric motor 65 moves the paddy input port 64a along a rotation locus T. Specifically, the grain discharge auger 64 is configured such that the paddy input port 64a can move along the rotation locus T from a position more forward than the front end portion of the threshing unit 9 to a position more rearward than the rear end portion of the threshing unit 9. In other words, the grain discharge auger 64 moves in the inner diameter side (inner side) area of the rotation locus T. According to the above structure, the grains stored in the grain box 6 can be discharged to a truck cargo box or a container, etc.

[0043] As shown Figures 1 to 3 in the figure, a control column 41 and a driver's seat 42 are arranged in the driving operation unit 5. An accelerator lever 40, a steering wheel 43, a main transmission lever 44, a sub-transmission lever 45, a cutting clutch lever 46, and a threshing clutch lever 47 are arranged on the control column 41. The accelerator lever 40 adjusts the rotational speed of the engine 7. The steering wheel 43 changes the traveling route of the traveling body 1a. The main transmission lever 44 and the sub-transmission lever 45 switch the moving speed of the traveling body 1a. The cutting clutch lever 46 drives or stops the cutting unit 3. The threshing clutch lever 47 drives or stops the threshing unit 9. In addition, a roof body 49 for shading is installed above the front side of the grain tank 6 by means of a sunshade pillar 48. The roof body 49 covers the upper side of the driving operation unit 5. The sunshade pillar 48 is arranged in the right region of the mounting table 66.

[0044] On the lower part of the traveling body 1a, left and right crawler frames 50 are arranged. A drive sprocket 51, a tension roller 52, a plurality of crawler rollers 53, and an intermediate roller 54 are arranged on the crawler frame 50. The drive sprocket 51 supports the front side of the crawler 2 and transmits the power of the engine 7 to the crawler 2. The tension roller 52 supports the rear side of the crawler 2 and maintains the tension of the crawler 2. The crawler roller 53 keeps the grounded side of the crawler 2 in a grounded state. The intermediate roller 54 supports the non-grounded side of the crawler 2.

[0045] Next, with reference to Figures 4 to 9 the structure of the first fuel tank 200 and its periphery in Embodiment 1 will be described.

[0046] Figure 5 is a left view of the first fuel tank 200, Figure 6 is a right view of the first fuel tank 200, Figure 7 is a perspective view of the first fuel tank 200. Figure 8 is a perspective view showing the rear part of the threshing unit 9 after the first fuel tank 200 is removed. In addition, Figure 5 and Figure 6 the illustration of the fuel tank cover 100 covering the first fuel tank 200 is omitted in

[0047] The fuel tank of this embodiment is composed of a first fuel tank 200 and a second fuel tank 300.

[0048] Figure 9 is a perspective view of the first fuel tank 200. Specifically, it is a view of the first fuel tank 200 observed from the lower left side. As Figures 1 to 7 shown, the first fuel tank 200 is arranged on the traveling body 1a. Specifically, the first fuel tank 200 is arranged behind the threshing unit 9 and above the dust exhaust unit 23.

[0049] As shown Figures 1 to 8 in FIG. 1, the combine harvester 1 is provided with a protection part 400.

[0050] The protection part 400 protects the first fuel tank 200. The protection part 400 is disposed on the rotation locus T of the grain discharge auger 64. In addition, "on the rotation locus T" means a region more radially inward than the rotation locus T. Therefore, the protection part 400 can prevent the first fuel tank 200 from interfering with the grain discharge auger 64.

[0051] The grain discharge auger 64 is cantilever-supported at its base end, and may sometimes be located below the lowest limit position of the theoretical axis during rotation due to its own elastic deformation and tolerances. Even when the lower part of the grain discharge auger 64 is located lower than the upper end of the first fuel tank 200, the protection part 400 is interposed between the grain discharge auger 64 and the first fuel tank 200. That is, when the grain discharge auger 64 approaches the first fuel tank 200, the protection part 400 restricts the contact between the first fuel tank 200 and the grain discharge auger 64. Thus, even when the grain discharge auger 64 approaches the first fuel tank 200, the protection part 400 can prevent the first fuel tank 200 from interfering with the grain discharge auger 64.

[0052] The first fuel tank 200 is disposed behind the threshing part 9 and above the dust exhaust part 23, so the space behind the first fuel tank 200 is not restricted. Therefore, the first fuel tank 200 can have a larger volume than a fuel tank not disposed behind the threshing part 9 and above the dust exhaust part 23.

[0053] The grain discharge auger 64 is configured to be able to move up and down in the vertical direction by a hydraulic cylinder 55 for auger lifting. Thereby, the operability of the grain discharge auger 64 can be improved, and interference between the first fuel tank 200 and the grain discharge auger 64 can be prevented.

[0054] The first fuel tank 200 and the second fuel tank 300 will be described in detail.

[0055] As shown Figure 4 in FIG. 2, the second fuel tank 300 is disposed at the rear of the traveling body 1a and on the traveling body 1a. The second fuel tank 300 is disposed behind and below the threshing part 9. The internal spaces of the first fuel tank 200 and the second fuel tank 300 communicate with each other.

[0056] The second fuel tank 300 is supported on the traveling body 1a by two fastening straps 320. The fastening straps 320 are mounted along the surfaces of the front surface, upper surface, and rear surface of the second fuel tank 300. For example, one end of the fastening strap 320 is fastened to the traveling body 1a using bolts, and a hook (not shown) is fixed to the other end of the fastening strap 320, and the hook is engaged with a belt engaging member (not shown) on the traveling body 1a. The support structure of the second fuel tank 300 is not limited to this.

[0057] A fuel outlet (not shown) is provided on the lower surface of the second fuel tank 300. In addition, as Figure 4 , Figure 6 and Figure 7 shown, fuel supply pipes 331, fuel transfer pipes 332, fuel return pipes 333, etc. are provided as fuel pipes. The fuel supply pipe 331 connects the fuel outlet of the second fuel tank 300 to the oil-water separator 340. The fuel transfer pipe 332 connects the oil-water separator 340 to a fuel filter (not shown). The fuel return pipe 333 connects the fuel return joint provided in the fuel filter to the fuel return port (not shown) of the second fuel tank 300.

[0058] The oil-water separator 340 removes the moisture contained in the fuel supplied from the second fuel tank 300 to the engine 7. The fuel filter removes foreign substances contained in the fuel supplied to the engine 7.

[0059] The fuel in the second fuel tank 300 is supplied to the engine 7 via the fuel supply pipe 331, the oil-water separator 340, the fuel transfer pipe 332, and the fuel filter from the fuel outlet of the second fuel tank 300. In addition, the surplus fuel from the engine 7 returns to the inside of the second fuel tank 300 via the fuel return joint of the fuel filter, the fuel return pipe 333, and the fuel return port of the second fuel tank 300.

[0060] Refer to Figures 4 to 7 and Figure 9 to describe the first fuel tank 200. The first fuel tank 200 has an approximately rectangular parallelepiped shape that is long in the left-right direction, and is configured to include an upper surface 201, a lower surface 202, a front surface 203, a rear surface 204, a left side surface 205, and a right side surface 206. The first fuel tank 200 has a tank main body 200A, a fuel supply port 210, a first constricted portion 221, a second constricted portion 222, a third constricted portion 223, and a bulged portion 250.

[0061] The fuel supply port 210 protrudes upward from the tank main body 200A. Specifically, the fuel supply port 210 is provided on the upper surface 201 of the first fuel tank 200 closer to the fulcrum O side than the center in the left-right direction. The fuel supply port 210 is formed in a cylindrical shape, and a threaded fuel supply cap 211 is detachably assembled to the end of the fuel supply port 210.

[0062] As Figure 5 shown, a cylindrical first ventilation hole 212 is provided on the upper surface 201. One end of the first ventilation pipe 213 is connected to the first ventilation hole 212. The other end of the first ventilation pipe 213 is guided upward, and is bent so that the opening portion faces downward and is supported by the frame 120.

[0063] As Figure 9 shown, a first constricted portion 221, a second constricted portion 222, and a third constricted portion 223 are provided on the upper surface 201 and the rear surface 204 of the first fuel tank 200. Each constricted portion extends in the front-rear direction on the upper surface 201 and extends in the up-down direction on the rear surface 204. Each constricted portion is recessed toward the inside of the tank main body 200A.

[0064] The first constricted portion 221 is arranged between the fuel supply port 210 and the right side surface 206 in the left-right direction. The second constricted portion 222 is arranged at a position on the opposite side of the first constricted portion 221 with respect to the fuel supply port 210 in the left-right direction. The third constricted portion 223 is arranged between the second constricted portion 222 and the left side surface 205.

[0065] As Figure 4 shown, a bulging portion 250 that bulges more toward the grain tank 6 side (i.e., the right side surface 206 side) is provided on the first fuel tank 200 on the grain tank 6 side. In the illustrated example, with the first constricted portion 221 as a reference, the portion on the left side of the first constricted portion 221 is arranged behind the threshing portion 9, and the bulging portion 250 on the right side of the first constricted portion 221 is arranged behind the grain tank 6.

[0066] As Figure 9 shown, a protruding portion 251 that protrudes more downward than the lower surface 202 of the first fuel tank 200 is provided on the lower surface of the bulging portion 250.

[0067] As Figure 4 , Figure 6 , Figure 7 and Figure 9 shown, a connection port 214 is provided on the lower surface of the protruding portion 251. The connection port 214 and the second fuel tank 300 are connected by a connecting pipe 260. The connecting pipe 260 connects the two internal spaces of the first fuel tank 200 and the second fuel tank 300. Thereby, fuel can flow between the first fuel tank 200 and the second fuel tank 300 via the connecting pipe 260.

[0068] In addition, the protruding portion 251 protrudes downward more than the lower surface 202 of the first fuel tank 200. Therefore, the fuel in the first fuel tank 200 easily accumulates in the protruding portion 251. Thus, a structure is formed such that even if the fuel in the first fuel tank 200 decreases, the fuel can flow from the first fuel tank 200 to the second fuel tank 300.

[0069] Next, the support structure of the first fuel tank 200 will be described. First, the structure for supporting the rear portion of the threshing unit 9 of the first fuel tank 200 will be described. As Figure 8 shown, the rear portion of the threshing unit 9 is covered by the threshing rear plate 101, the upper portion is covered by the threshing upper plate 102, the right side portion is covered by the threshing side plate 103, and the left side portion is covered by the threshing unit cover 104. At the upper end and the lower end of the threshing rear plate 101, there are provided an upper side bending portion 101a and a lower side bending portion 101b that are bent in a shape protruding rearward. Two locking members 110 are arranged at intervals in the left-right direction on the upper side bending portion 101a.

[0070] As Figures 4 to 7 shown, the first fuel tank 200 is supported by a support member 116 on the rear surface of the threshing unit 9 (that is, the threshing rear plate 101). That is, the support member 116 supports the first fuel tank 200 behind the threshing unit 9. The support member 116 includes a first support member 111, a second support member 112, and a third support member 113.

[0071] As Figure 8 shown, the first support member 111 is an L-shaped member that supports the left side surface 205 and the lower surface 202 of the first fuel tank 200 in a surface contact manner. For example, the first support member 111 is welded to the upper side bending portion 101a, the lower side bending portion 101b, and the third support member 113. At the upper end and the rear end of the first support member 111, there are provided a bending portion 111a and a bending portion 111b in a bent shape.

[0072] The second support member 112 is a plate-shaped member that supports the lower surface 202 of the first fuel tank 200 in a surface contact manner. For example, the second support member 112 is welded to the threshing rear plate 101. At the right end portion of the second support member 112, there is provided a bending portion 112a in a bent shape. The strength of the second support member 112 is increased by the bending portion 112a.

[0073] The third support member 113 is a plate-like member that supports the lower surface 202 of the first fuel tank 200 in a surface-contact manner and has a stepped and bent shape. For example, the third support member 113 is welded to the first support member 111 and the second support member 112. A bent portion 113a that is stepped and bent is provided at the rear of the third support member 113. The strength of the third support member 113 is increased by the bent portion 113a. In addition, the bent portion 113a also functions as a buffer member that alleviates the impact when the traveling body 1a collides with an obstacle.

[0074] The first fuel tank 200 is supported by the threshing rear plate 101 using, for example, two or more fastening straps. The two fastening straps 115 are strap members that are installed along the upper surface 201 and the rear surface 204 of the first fuel tank 200. As Figure 4 and Figure 7 shown, the two fastening straps 115 are respectively received in the first constricted portion 221 and the second constricted portion 222. For example, one end of the fastening strap 115 is fastened to the third support member 113 using a bolt, and a hook (not shown) is fixed to the other end of the fastening strap 115, and the hook is engaged with the belt locking member 110.

[0075] By assembling the two fastening straps 115 along the upper surface 201 and the rear surface 204 of the first fuel tank 200, displacement of the first fuel tank 200 in the vertical direction, the left-right direction, and the front-rear direction is prevented. In addition, the left side surface 205 of the first fuel tank 200 abuts against the first support member 111 to prevent displacement of the first fuel tank 200 in the leftward direction.

[0076] The first fuel tank 200 is further supported by the protection part 400 in addition to the support member 116 and the fastening strap 115. The protection part 400 supports the first fuel tank 200. Specifically, the protection part 400 restrains the first fuel tank 200 from moving in the front-rear direction and the left-right direction. The protection part 400 is a pipe material having a C-shaped bent shape. As Figure 8 shown, the protection part 400 has an extension part 410, an intermediate part 420, and an inclined part 430.

[0077] As Figure 7 and Figure 8 shown, the extension part 410 is located at a position higher than the fuel supply port 210. In other words, the protection part 400 extends more upward than the fuel supply port 210. Therefore, during turning, interference between the grain discharge auger 64 and the fuel supply port 210 can be suppressed. Specifically, the upper end of the protection part 400 extends more upward than the upper end of the fuel supply port 210. When the grain discharge auger 64 approaches the first fuel tank 200, the grain discharge auger 64 cannot pass above the first fuel tank 200. Thus, when the grain discharge auger 64 returns to the mounting table 66, interference between the grain discharge auger 64 and the fuel supply port 210 can be suppressed.

[0078] The extension part 410 has a protruding part 411 and a first fixing part 415. One end of the extension part 410 is connected to the threshing part 9, and the other end of the extension part 410 is connected to one end of the middle part 420.

[0079] The protruding part 411 protrudes more rearward than the first fuel tank 200. The pedal 140 is arranged more rearward than the threshing part 9 and more downward than the dust discharging part 23. As a result, the fuel supply to the first fuel tank 200 becomes easy. Specifically, the protruding part 411 protrudes more rearward than the rear surface 204 of the first fuel tank 200 in the front-rear direction. The pedal 140 is provided on the traveling body 1a. When fuel is supplied to the first fuel tank 200, the operator can place his / her foot on the pedal 140. Therefore, the operator can grasp the protruding part 411 and approach the fuel supply port 210.

[0080] As Figure 8 shown, the first fixing part 415, which is one end of the extension part 410, is fixed to the threshing rear plate 101. Specifically, the first fixing part 415 is connected to a bracket 416 fixed to the right end of the upper side bending part 101a.

[0081] The middle part 420 has a received part 421, a connecting part 422, and a second fixing part 425. The other end of the middle part 420 is connected to one end of the inclined part 430.

[0082] At least the front side part of the received part 421 is received in the first necking part 221 provided on the surface of the rear surface 204. That is, the protection part 400 is received in the first necking part 221. Therefore, the protection part 400 can position the first fuel tank 200 by means of the received part 421. When the first fuel tank 200 moves in the left-right direction, the received part 421 contacts the first necking part 221. Thereby, the protection part 400 restricts the position of the first fuel tank 200 in the left-right direction.

[0083] The connecting part 422 contacts the upper surface 201 of the first fuel tank 200. Specifically, the connecting part 422 connects one end of the extension part 410 and one end of the middle part 420 in the front-rear direction and contacts the first necking part 221 of the upper surface 201 downward. The upper side support part 427 is supported by the connecting part 422.

[0084] As Figure 4 , Figure 7 and Figure 8 shown, the upper side support part 427 is arranged in the left-right direction. One end of the upper side support part 427 is connected to the middle part in the front-rear direction of the connecting part 422, and the other end of the upper side support part 427 is connected to the upper part of the fuel tank cover 100 covering the rear part of the first fuel tank 200.

[0085] AsFigure 8 As shown, the second fixing portion 425 is fixed to the second supporting member 112. Specifically, the second fixing portion 425 is fixed to the bracket 426 fixed to the rear end portion of the bent portion 112a. That is to say, the protection portion 400 is fixed to the supporting member 116. Therefore, the supporting strength of the protection portion 400 can be improved. Specifically, by means of the second supporting member 112, the middle portion of the protection portion 400 is fixed to the threshing portion 9, thereby being able to improve the supporting strength of the supporting member 116 for supporting the protection portion 400. The lower supporting portion 428 is supported by the protection portion 400.

[0086] As Figure 4 , Figure 7 and Figure 8 shown, the lower supporting portion 428 is arranged in the left - right direction. One end of the lower supporting portion 428 is connected to the second fixing portion 425, and the other end of the lower supporting portion 428 is connected to the lower portion of the fuel tank cover 100.

[0087] As Figure 8 shown, the second supporting member 112 supports the first fuel tank 200 from below. Therefore, the supporting strength of the protection portion 400 can be further improved. Specifically, since the second supporting member 112 supports the weight of the first fuel tank 200, the supporting strength of the second supporting member 112 is relatively high. As a result, the supporting strength of the protection portion 400 fixed to the second supporting member 112 can be further improved.

[0088] The inclined portion 430 has a third fixing portion 435. The other end of the inclined portion 430 is connected to the threshing portion 9.

[0089] The third fixing portion 435 is fixed to the threshing side plate 103. Specifically, the third fixing portion 435 is connected to the bracket 436 fixed to the rear end portion of the threshing side plate 103.

[0090] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above - described embodiments and can be implemented in various ways without departing from its gist. In addition, the multiple constituent elements disclosed in the above - described embodiments can be appropriately changed. For example, a certain constituent element among all the constituent elements shown in a certain embodiment can be added to the constituent elements of another embodiment, or several constituent elements among all the constituent elements shown in a certain embodiment can be deleted from the embodiment.

[0091] In addition, for the convenience of understanding the present application, the accompanying drawings schematically show each constituent element as the main body, and the thickness, length, number, interval, etc. of each illustrated constituent element may sometimes be different from the actual situation according to the situation of making the drawings. In addition, the structure of each constituent element shown in the above - described embodiments is an example and is not particularly limited. Of course, various changes can be made without substantially departing from the effects of the present application.

[0092] In the above-described embodiment, the combine harvester 1 includes: a cutting unit 3 that cuts cereal straws; a threshing unit 9 that threshes the cut cereal straws; a grain tank 6 that stores the threshed grains; and a dust discharging unit 23 that discharges the processed material after threshing. However, as long as it includes at least a traveling body 1a, a first fuel tank 200, a grain discharging auger 64, and a protection unit 400, it is sufficient. Therefore, the structures other than the traveling body 1a, the first fuel tank 200, the grain discharging auger 64, and the protection unit 400 can also be omitted.

[0093] The power source is not limited to a diesel engine and can also be an electric motor.

[0094] In the above-described embodiment, the fuel tank is configured to include a first fuel tank 200 and a second fuel tank 300. However, as long as it has at least the first fuel tank 200, it is sufficient. Therefore, the fuel tank can also be configured to include only the first fuel tank 200. In addition, the fuel tank of the combine harvester 1 can also be configured by using three or more fuel tanks including the first fuel tank 200. In addition, when the fuel tank is configured by using three or more fuel tanks, the respective fuel tanks can be connected or formed as separate independent fuel tanks.

[0095] In the above-described embodiment, the first fuel tank 200 and the rotating shaft 67 of the grain discharging auger 64 are arranged at the rear end portion of the traveling body 1a. However, as long as at least the first fuel tank 200 is arranged on the turning locus T of the grain discharging auger 64, the first fuel tank 200 and the rotating shaft 67 of the grain discharging auger 64 can also be arranged at any one of the left, right, and front end portions of the traveling body 1a.

[0096] In the above-described embodiment, the protection unit 400 is constituted by a C-shaped member arranged in the front-rear direction covering the first fuel tank 200. However, the protection unit 400 can also be constituted by a C-shaped member arranged in the left-right direction covering the first fuel tank 200. In addition, the protection unit 400 can also be arranged only on one side of the front, rear, left, and right of the first fuel tank 200.

[0097] In the above-described embodiment, the grain discharging auger 64 is configured to be able to be lifted and turned by a hydraulic cylinder 55 for auger lifting and an electric motor 65. However, the grain discharging auger 64 can also be configured to be able to be lifted and turned manually. In addition, manual operation can also be performed only on the lifting or turning of the operation of the grain discharging auger 64.

[0098] The present application discloses the following appended notes. The following appended notes do not limit the present invention.

[0099] (Appended Note 1)

[0100] A combine harvester, wherein,

[0101] The combine harvester includes:

[0102] A traveling body;

[0103] A fuel tank disposed on the traveling body;

[0104] A discharge auger configured to be rotatable and discharge threshed grains; and

[0105] A protection part disposed on the trajectory of rotation of the discharge auger and restricting contact between the fuel tank and the discharge auger.

[0106] (Appendix 2)

[0107] The combine harvester according to Appendix 1, wherein

[0108] The combine harvester further includes:

[0109] A cutting part connected to the front of the traveling body and cutting cereal straws;

[0110] A threshing part disposed on one side in the left-right direction of the traveling body and threshing the cut cereal straws;

[0111] A grain tank disposed on the other side in the left-right direction of the traveling body and storing the grains threshed by the threshing part; and

[0112] A dust discharging part disposed behind the threshing part and discharging the processed material after threshing,

[0113] The fuel tank is disposed behind the threshing part and above the dust discharging part,

[0114] The rotation axis of the discharge auger is disposed behind the grain tank.

[0115] (Appendix 3)

[0116] The combine harvester according to Appendix 1 or 2, wherein

[0117] The fuel tank has: a tank main body; and an oil supply port protruding upward from the tank main body,

[0118] The protection part extends more upward than the oil supply port.

[0119] (Appendix 4)

[0120] The combine harvester according to Appendix 3, wherein

[0121] The combine harvester further includes:

[0122] A threshing unit disposed on one side in the left-right direction of the traveling body;

[0123] A dust discharging unit disposed behind the threshing unit and discharging the processed material after threshing; and

[0124] A pedal disposed more rearward than the threshing unit and more downward than the dust discharging unit,

[0125] The protective part has a protruding part that protrudes more rearward than the fuel tank.

[0126] (Supplementary Note 5)

[0127] The combine harvester according to Supplementary Note 2, wherein

[0128] The combine harvester further includes: a support member that supports the fuel tank behind the threshing unit,

[0129] The protective part is fixed to the support member.

[0130] (Supplementary Note 6)

[0131] The combine harvester according to Supplementary Note 5, wherein

[0132] The support member supports the fuel tank from below.

[0133] (Supplementary Note 7)

[0134] The combine harvester according to Supplementary Note 2, wherein

[0135] The protective part is fixed to the side part of the threshing unit.

[0136] (Supplementary Note 8)

[0137] The combine harvester according to any one of Supplementary Notes 1 to 7, wherein

[0138] The fuel tank further has a necking part that is recessed toward the inside of the fuel tank, and the protective part has a received part received in the necking part.

[0139] (Supplementary Note 9)

[0140] The combine harvester according to any one of Supplementary Notes 1 to 8, wherein the discharge auger is configured to be able to move up and down in the vertical direction.

[0141] Industrial Applicability

[0142] The present invention is a combine harvester and has industrial applicability.

Claims

1. A combine harvester, characterized in that, the combine harvester includes: a traveling body; a fuel tank disposed on the traveling body; a discharge auger configured to be rotatable and discharge threshed grains; and a protection part disposed on the trajectory of the rotation of the discharge auger and restricting contact between the fuel tank and the discharge auger.

2. The combine harvester according to claim 1, characterized in that, the combine harvester further includes: a cutting part connected to the front of the traveling body; a threshing part disposed on one side in the left-right direction of the traveling body; a grain tank disposed on the other side in the left-right direction of the traveling body and storing the grains threshed by the threshing part; and a dust discharging part disposed behind the threshing part and discharging the processed material after threshing, the fuel tank is disposed behind the threshing part and above the dust discharging part, the rotation axis of the discharge auger is disposed behind the grain tank.

3. The combine harvester according to claim 1 or 2, characterized in that, the fuel tank has: a tank main body; and a fuel supply port protruding upward from the tank main body, the protection part extends more upward than the fuel supply port.

4. The combine harvester according to claim 3, characterized in that, the combine harvester further includes: a threshing part disposed on one side in the left-right direction of the traveling body; a dust discharging part disposed behind the threshing part and discharging the processed material after threshing; and a pedal disposed behind the threshing part and below the dust discharging part, the protection part has a protruding part extending more rearward than the fuel tank.

5. The combine harvester according to claim 2, characterized in that, the combine harvester further includes: a support member supporting the fuel tank on the rear part of the threshing part, the protection part is fixed to the support member.

6. The combine harvester according to claim 5, characterized in that, the support member supports the fuel tank from below.

7. The combine harvester according to claim 2, characterized in that, the protection part is fixed to the side part of the threshing part.

8. The combine harvester according to claim 1 or 2, characterized in that, the fuel tank further has a necking part recessed toward the inside of the fuel tank, the protection part has a received part received in the necking part.

9. The combine harvester according to claim 1 or 2, characterized in that, the discharge auger is configured to be able to move up and down in the vertical direction.

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