combine

Abstract

To provide a combine harvester with improved frame rigidity in the operating section. [Solution] The vehicle comprises a vehicle frame, a hydrostatic continuously variable transmission, a driver's control panel including a seat, a floor panel forming the floor surface of the driver's control panel, a front panel covering the front of the driver's control panel, a hydraulic valve unit having a connection port connected to the hydrostatic continuously variable transmission via a hydraulic hose and positioned below the floor panel, and a first support frame and a second support frame erected from the vehicle frame and supporting the front panel. The connection port of the hydraulic valve unit opens in a direction different from the direction facing the hydrostatic continuously variable transmission, the first support frame is positioned on the opposite side of the floor panel from the second support frame in the vehicle width direction, and the second support frame is positioned on the opposite side of the floor panel from the first support frame in the vehicle width direction, and between the transmission case and the hydraulic valve unit.

Description

Technical Field

[0001] The present invention relates to a combine that threshes while cutting grain straws while traveling, and more particularly to a combine including a support frame erected from a machine body frame.

Background Art

[0002] Conventionally, a combine has been disclosed that includes a machine body frame supported by crawler traveling devices, a cutting unit that cuts and conveys grain straws, a driver's seat, and a threshing unit that threshes grain straws (see Patent Document 1). On the front right side of the machine body frame, a step frame that supports the floor surface of the driver's seat protrudes upward from the machine body frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the step frame described in Patent Document 1 above is narrower in width than the floor surface of the driver's seat, which has been a factor in the reduction of the frame rigidity of the driving operation unit.

[0005] Therefore, an object of the present invention is to provide a combine with improved frame rigidity of the driving operation unit.

Means for Solving the Problems

[0006] One aspect of the present invention relates to a combine harvester that cuts and threshes grain stalks while moving, comprising: a running gear; a machine frame supported by the running gear; an engine mounted on the machine frame; a transmission case connected to the running gear; a hydrostatic continuously variable transmission fixed to the transmission case and transmitting power from the engine to the running gear in a stepless manner; an operating unit including a seat on which an operator sits; a floor panel forming the floor surface of the operating unit; a front panel positioned in front of the seat and the floor panel and covering the front of the operating unit; and a hydraulic valve unit positioned below the floor panel and having a connection port connected to the hydrostatic continuously variable transmission via a hydraulic hose. The combine harvester comprises a first support frame and a second support frame that are erected from the machine frame and support the front panel, wherein the connection port of the hydraulic valve unit opens in a direction different from the direction facing the hydrostatic continuously variable transmission, the first support frame is positioned in front of the hydrostatic continuously variable transmission and on the opposite side of the floor panel from the second support frame in the machine width direction, and the second support frame is positioned in front of the hydrostatic continuously variable transmission and on the opposite side of the floor panel from the first support frame in the machine width direction and between the transmission case and the hydraulic valve unit. [Effects of the Invention]

[0007] According to the present invention, the frame rigidity of the operating section can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] A side view showing a combine harvester according to an embodiment of the present invention. [Figure 2] A plan view showing a combine harvester. [Figure 3] A perspective view showing the aircraft frame and the control frame unit of the control panel. [Figure 4] Another perspective view showing the aircraft frame and the flight frame unit. [Figure 5] A side view showing the aircraft frame and the control frame unit. [Figure 6] A perspective view showing the surrounding configuration of the control panel. [Figure 7] Plan view showing the aircraft frame and mission case. [Figure 8] A front view showing the arrangement of the driving frame unit and HST. [Figure 9] A perspective view showing the surrounding configuration of the driving frame unit. [Figure 10] A perspective view showing the driving frame unit. [Figure 11] A perspective view showing the aircraft frame. [Figure 12] A perspective view of the aircraft frame, the first support frame, and the second support frame, seen from below. [Figure 13] A plan view showing the floor support members. [Figure 14] A plan view showing the hydraulic valve unit with the floor support members removed. [Figure 15] Front view showing the hydraulic valve unit. [Modes for carrying out the invention]

[0009] [Overall configuration of the combine harvester] Embodiments of the present invention will be described below with reference to the drawings. As shown in Figures 1 and 2, the self-propelled combine harvester 1 comprises a crawler travel device 2 as a travel device, a travel body 5 supported by the crawler travel device 2, and a pre-processing unit 6 mounted on the front of the travel body 5 so as to be able to move up and down. The travel body 5 is provided with a machine frame 7 at the bottom, and above the machine frame 7 are an operating unit 9, an engine (not shown), a threshing unit 11 for threshing grain from harvested stalks, and a grain tank 12 for temporarily storing the threshed grain. A discharge auger 13 for discharging grain from the grain tank 12 to the outside of the machine is located on the upper part of the travel body 5.

[0010] The preprocessing unit 6 includes a divider 15 for separating cereal straws provided at the front part, a lifting device (not shown) for lifting the cereal straws separated behind the divider 15, and a reciprocating cutting blade 16 for cutting the cereal straws. Further, the preprocessing unit 6 has a conveying device for conveying the cereal straws lifted by the lifting device and cut by the cutting blade 16 backward and delivering them to the feed chain 19 of the threshing unit 11. On the side of the preprocessing unit 6, a narrow guide 21 is provided which is configured to be switchable between a working posture that projects forward of the traveling body 5 to separate the cereal straws in the field and a storage posture that is drawn closer to the traveling body 5.

[0011] The threshing unit 11 has a handling chamber (not shown) with a handling cylinder built in at the upper part, and below the handling chamber, there is a sorting chamber (not shown) for sorting the impurities including the grains leaked from the handling chamber by rocking sorting and air sorting. The feed chain 19 is disposed outside the machine body of the handling chamber, and a clamping rail 20 biased downward by a spring is arranged above the feed chain 19. The feed chain 19 clamps the cereal straws between itself and the clamping rail 20, conveys the cereal straws while passing the spike tip side of the cereal straws into the handling chamber, and threshes the cereal straws.

[0012] The grains threshed by the threshing unit 11 are conveyed to the grain tank 12 and stored therein. A discharge auger 13 is arranged at the upper part of the grain tank 12, and the grains stored in the grain tank 12 are discharged by the discharge auger 13, for example, onto the loading platform of a truck stopped outside the field.

[0013] Further, a straw discharge processing unit 22 is provided behind the threshing unit 11 and the grain tank 12. The straw discharge processing unit 22 is connected to the rear end of the feed chain 19. The straw discharged after threshing in the threshing unit 11 is conveyed to the straw discharge processing unit 22 and processed by the straw discharge processing unit 22. That is, the straw discharge processing unit 22 processes the straw that has passed through the threshing unit 11. The straw discharge processing unit 22 is configured to be able to execute a cutting process of cutting the straw with a cutter provided in the straw discharge processing unit 22 and a discharging process of discharging the straw to the field without cutting it with the cutter. The discharging process is appropriately selected from a bundling process of bundling the straw, a dropper process of collecting the straw in a predetermined amount and discharging it as it is to the field, and a natural discharging process of continuously discharging the straw without collecting it as it is.

[0014] The operation control unit 9 is provided with a seat 31 on which an operator sits, a touch panel type liquid crystal monitor 34 disposed in front of the seat 31, and a multi-steering lever 35 disposed to the right of the liquid crystal monitor 34 and capable of performing the lifting operation of the pretreatment unit 6 and the turning operation of the traveling body 5. Further, a side panel 32 provided to the left of the seat 31 is disposed in the operation control unit 9.

[0015] The side panel 32 is provided with a main transmission lever 38, a sub-transmission lever 39, and the like. The main transmission lever 38 can continuously adjust the forward or backward vehicle speed of the crawler traveling device 2 by being operated forward or backward from the neutral position. The sub-transmission lever 39 switches the gear type sub-transmission device of the transmission case 51 between a low-speed working range and a high-speed working range to switch between a traveling speed (high speed) and a working speed (low speed). The main transmission lever 38 and the sub-transmission lever 39 are movable along guide grooves provided in the side panel 32.

[0016] [Drive Configuration of Combine Harvester] Next, the drive configuration for the combine harvester 1 will be described using Figures 3 and 4. Figure 3 is a perspective view showing the machine frame 7 and the driving frame unit 40 of the operating unit 9. Figure 4 is another perspective view showing the machine frame 7 and the driving frame unit 40. The engine of the combine harvester 1 described above is located below and behind the seat 31. That is, the engine is located in the engine room ER shown in Figures 3 and 4. In addition to the engine, auxiliary equipment such as a radiator is located in the engine room ER. The engine drives the HST (hydrostatic continuously variable transmission) 52 via the driving clutch. The HST 52 has an HST pump that discharges hydraulic fluid using power from the engine, and an HST motor that is driven by the hydraulic fluid supplied from the HST pump, i.e., the supply oil.

[0017] The HST52 is configured to continuously vary the speed of the engine's driving power by changing the angle of a swash plate (not shown) on the HST pump, thereby supplying oil to the HST motor according to the angle of the swash plate. The power varied by the HST52 drives the left and right drive sprockets 2a and 2b of the crawler running gear 2 via a gear-type sub-transmission that changes between working speed and driving speed, located in the transmission case 51, and a steering system consisting of left and right side clutches and brakes. The HST52 is operated by the main transmission lever 38 described above, and the sub-transmission is operated by the sub-transmission lever 39 described above. The HST52 is fixed to the top of the transmission case 51.

[0018] [Frame configuration of the control panel] Next, the frame configuration of the control unit 9 will be described using Figures 3 to 6. Figure 5 is a side view showing the machine frame 7 and the control frame unit 40. Figure 6 is a perspective view showing the surrounding configuration of the control unit 9.

[0019] As shown in Figures 3 to 6, the aircraft frame 7 has a plurality of beam frames extending in the longitudinal direction X of the aircraft, and a plurality of crossbar frames extending in the aircraft width direction Y, which is perpendicular to the longitudinal direction X of the aircraft. The plurality of beam frames include, for example, a first beam frame 7a and a second beam frame 7b. These first beam frames 7a and second beam frames 7b are aligned in the aircraft width direction Y. The plurality of crossbar frames include, for example, a crossbar frame 7e.

[0020] From the main body frame 7, the operating frame unit 40, which is the frame for the operating control unit 9, is erected. The operating frame unit 40 includes a first support frame 41 and a second support frame 42 located on the front side of the operating frame unit 40, and a radiator frame 43 and a cover frame 44 located on the rear side of the operating frame unit 40. The radiator frame 43 is located behind the first support frame 41, and the cover frame 44 is located behind the second support frame 42. In other words, the second support frame 42 and the cover frame 44 are located further inside the main body than the first support frame 41 and the radiator frame 43 in the width direction Y of the main body. To put it another way, the first support frame 41 and the radiator frame 43 are located on the right side of the main body 5, and the second support frame 42 and the cover frame 44 are located on the central side of the main body 5.

[0021] The radiator frame 43 has a first radiator support 43a erected from the aircraft frame 7 and a second radiator support 43b erected from the aircraft frame 7 and positioned behind the first radiator support 43a. The cover frame 44 has a first cover support 44a erected from the aircraft frame 7 and a second cover support 44b erected from the aircraft frame 7 and positioned behind the first cover support 44a. More specifically, the first radiator support 43a and the second radiator support 43b are erected from the first beam frame 7a, and the first cover support 44a is erected from the second beam frame 7b.

[0022] As shown in Figure 3, a front panel bracket 61 is fixed to the first support frame 41 and the second support frame 42, and a front panel 62 that covers the front of the driver's control panel 9 is attached to the front panel bracket 61, as shown in Figures 1 and 6. In other words, the front panel 62 is supported by the first support frame 41 and the second support frame 42 via the front panel bracket 61. The front panel 62 is positioned in front of the seat 31 and the floor panel 76, which will be described later.

[0023] As shown in Figures 3 and 6, the first beam frame 7a and the second beam frame 7b of the aircraft frame 7 are positioned between the first support frame 41 and the second support frame 42 in the aircraft width direction Y. The first beam frame 7a and the second beam frame 7b support the battery support plate 63 at their front ends. A battery 64 is mounted and attached to the battery support plate 63, as shown in Figure 6.

[0024] Furthermore, the oil filter 66 is supported (fixed) to the second support frame 42 via a bracket 65. The oil filter 66 is connected to the HST 52 via a hydraulic hose 66a (see Figure 9) and removes foreign matter from the hydraulic fluid of the HST 52. The oil filter 66 needs to be maintained periodically by replacing the filter cartridge. At this time, the oil filter 66 is subjected to strong forces, but the oil filter 66 is attached to the robust second support frame 42, which is erected from the main frame 7, via a bracket 65. Therefore, the oil filter 66 can be maintained with peace of mind, improving maintainability. In addition, since the oil filter 66 is only attached to the second support frame 42 via a bracket 65, a complex mounting configuration is unnecessary, which can lead to cost reduction and weight reduction.

[0025] Furthermore, the oil filter 66 is attached to the side of the second support frame 42 on the side of the first support frame 41, and is positioned between the battery 64 and the second support frame 42 in the machine width direction Y. Therefore, the battery 64 and the oil filter 66 can be accessed from between the first support frame 41 and the second support frame, and can be easily accessed from the right side of the combine harvester 1. The pre-processing unit 6 can be opened from right to left around a pivot axis on the left side of the machine. This creates space for maintenance between the operating unit 9 and the pre-processing unit 6, allowing easy access to the battery 64 and the oil filter 66.

[0026] Furthermore, as shown in Figures 3 and 4, below the seat 31, the engine room ER is formed, surrounded by the first radiator support column 43a, the second radiator support column 43b, the first cover support column 44a, and the second cover support column 44b. In addition, behind the battery support plate 63, a valve housing section 67 is formed, surrounded by the first support column frame 41, the second support column frame 42, the first radiator support column 43a, and the first cover support column 44a. The valve housing section 67 will be described later.

[0027] [Mounting configuration of the first and second support frames] Next, the mounting configuration of the first support frame 41 and the second support frame 42 will be described using Figures 1 and 6 to 12. Figure 7 is a plan view showing the aircraft frame 7 and the mission case 51. Figure 8 is a front view showing the arrangement of the driving frame unit 40 and the HST 52. Figure 9 is a perspective view showing the surrounding configuration of the driving frame unit 40. Figure 10 is a perspective view showing the driving frame unit 40. Figure 11 is a perspective view showing the aircraft frame 7. Figure 12 is a perspective view of the aircraft frame 7, the first support frame 41 and the second support frame 42 viewed from below.

[0028] As shown in Figures 1 and 6 to 12, the first beam frame 7a of the aircraft frame 7 is provided with a first extension portion 7c that extends in the aircraft width direction Y on the opposite side from the second beam frame 7b. The second beam frame 7b of the aircraft frame 7 is provided with a second extension portion 7d that extends in the aircraft width direction Y on the opposite side from the first beam frame 7a. That is, the first extension portion 7c extends to the right from the first beam frame 7a, and the second extension portion 7d extends to the left from the second beam frame 7b. Furthermore, the first extension portion 7c and the second extension portion 7d are cantilevered.

[0029] In this embodiment, the first extension portion 7c and the second extension portion 7d are welded to the first beam frame 7a and the second beam frame 7b, respectively, but the embodiment is not limited to this. For example, the first extension portion 7c may be formed integrally with the first beam frame 7a, and the second extension portion 7d may be formed integrally with the second beam frame 7b.

[0030] As described above, the first support frame 41 is erected from the first extension section 7c, and the second support frame 42 is erected from the second extension section 7d. By erecting the first support frame 41 and the second support frame 42 from the first extension section 7c and the second extension section 7d, respectively, as shown in Figure 10, the width L1 between the first support frame 41 and the second support frame 42 in the machine width direction Y is greater than the width L2 between the first beam frame 7a and the second beam frame 7b. By widening the width L1 between the first support frame 41 and the second support frame 42, the frame rigidity of the operating frame unit 40 can be improved.

[0031] As shown in Figures 10 to 12, in this embodiment, the first support frame 41 is fixed to the first extension 7c by mounting bolts 71. The second support frame 42 is fixed to the second extension 7d by mounting bolts 72. The method of attaching the first support frame 41 and the second support frame 42 to the first extension 7c and the second extension 7d is not limited, and they may be attached by welding, for example.

[0032] Furthermore, as shown in Figures 7 and 9, the radiator frame 43 is supported in a manner that allows the engine room cover 68, which opens and closes the engine room ER, to be opened and closed, and a dust cover 69 is attached to the engine room cover 68 in a manner that allows it to be opened and closed. In addition, an entry / exit step 70 projecting to the right is fixed to the first beam frame 7a, and the entry / exit step 70 is used as a step for the operator to step on when getting on or off the operating unit 9. The entry / exit step 70 is positioned between the first support frame 41 and the engine room cover 68 in the longitudinal direction X of the machine body.

[0033] The engine room cover 68 and the dust cover 69 have a predetermined thickness in the width direction Y of the aircraft body, and therefore protrude outward from the radiator frame 43, including the first radiator support column 43a. Thus, in the width direction Y of the aircraft body, the boarding / alighting step 70, the engine room cover 68, and the dust cover 69 protrude outward from the first beam frame 7a. The right end of the front panel 62, which is supported by the first support column frame 41 and the second support column frame 42 and covers the front of the driver's control unit 9, is in approximately the same position as the first support column frame 41.

[0034] When operating the combine harvester 1, the operator seated in the seat 31 recognizes the width of the combine harvester 1 by looking at the right end of the front panel 62 or the turn signal 62a attached to the right end of the front panel 62. For this reason, it is preferable that the amount by which the boarding / alighting steps 70, engine room cover 68, and dust cover 69 protrude outward from the front panel 62 is as small as possible. In this embodiment, the first support frame 41 is erected from the first extension portion 7c that protrudes outward from the machine body in the machine body width direction Y compared to the first beam frame 7a, and the front panel 62 is attached to the first support frame 41, so that the front panel 62 can protrude outward from the machine body compared to the first beam frame 7a. As a result, the amount by which the boarding / alighting steps 70, engine room cover 68, and dust cover 69 protrude outward from the front panel 62 can be reduced, improving the operability and appearance of the combine harvester 1.

[0035] Furthermore, as shown in Figure 7, in a plan view, the second beam frame 7b, the second extension 7d, and the crossbar frame 7f form a recessed space SP surrounded by these frames. Then, as shown in Figure 8, the HST 52 is positioned in this recessed space SP. As a result, the second support frame 42 is positioned to overlap the HST 52 when viewed in the longitudinal direction X of the machine body. The overlapping portion between the second support frame 42 and the HST 52 is shown by a dashed line in Figure 8.

[0036] Furthermore, as shown in Figure 9, the oil filter 66 is supported by the second support frame 42, and by bringing the HST 52 closer to the second support frame 42, the oil filter 66 and the HST 52 can be placed in close proximity. By bringing the HST 52 and the oil filter 66 close together, the hydraulic hose 66a can be made shorter, which reduces costs and back pressure.

[0037] [Hydraulic valve] Next, the hydraulic valve unit 73 housed in the valve housing 67 and its surrounding configuration will be described using Figures 9, 10, and 13 to 15. Figure 13 is a plan view showing the floor support member 75. Figure 14 is a plan view showing the hydraulic valve unit 73 with the floor support member 75 removed. Figure 15 is a front view showing the hydraulic valve unit 73.

[0038] As shown in Figures 9 and 10, a floor support frame 74 is fixed above the valve housing 67, which is surrounded by a valve housing 67 enclosed by a first support frame 41, a second support frame 42, a first radiator support 43a, and a first cover support 44a. The floor support frame 74 is configured in a roughly rectangular shape and extends horizontally. The floor support frame 74 also connects the first support frame 41, the second support frame 42, the first radiator support 43a, and the first cover support 44a to each other, improving the frame rigidity of the valve housing 67.

[0039] The valve housing 67 is covered on the front and right sides by cover members 67a and 67b, respectively. Furthermore, a floor support member 75 is fixed to the floor support frame 74, as shown in Figure 13, and a floor panel 76 is detachably attached to the floor support member 75 from above, as shown in Figures 9 and 10. In other words, the floor panel 76 is detachably supported by the floor support member 75, which in turn is supported by the first support frame 41, the second support frame 42, the first radiator support 43a, and the first cover support 44a via the floor support frame 74. The floor panel 76 forms the floor surface of the operating area 9.

[0040] A valve housing 67 is positioned below the floor support frame 74, floor support member 75, and floor panel 76, and a hydraulic valve unit 73 is housed in the valve housing 67. The front, right side, and top of the valve housing 67 are covered by cover members 67a, 67b and the floor panel 76, thereby reducing the entry of debris into the valve housing 67 and reducing damage to the hydraulic valve unit 73.

[0041] The worker can remove the floor panel 76, and when the floor panel 76 is removed, the floor support member 75 is exposed as shown in Figure 13. The floor support member 75 is provided with an opening 75a that forms a through hole that penetrates vertically (in the direction of gravity). The upper surface of the hydraulic valve unit 73 is provided with a connection port 73a to which the hydraulic hose 81 is connected. The connection port 73a opens upward and is connected to the HST 52 via the hydraulic hose 81. In this embodiment, the hydraulic valve unit 73 has a plurality of hydraulic valves that drive various hydraulic devices, but the connection ports of all of the hydraulic valves open upward.

[0042] Therefore, the operator can access the connection port 73a of the hydraulic valve unit 73 from above the floor support member 75 through the opening 75a of the floor support member 75. Thus, the hydraulic valve unit 73 can be easily accessed from the operating unit 9, improving the maintainability of the hydraulic valve unit 73.

[0043] As described above, the connection port 73a of the hydraulic valve unit 73 opens upward, and the HST 52 is positioned alongside the hydraulic valve unit 73 in the machine width direction Y. More specifically, the HST 52 is positioned to the left of the hydraulic valve unit 73. That is, the connection port 73a of the hydraulic valve unit 73 opens upward, in a direction different from the direction opposite to the HST 52 (to the left).

[0044] Therefore, the operator can perform maintenance on the hydraulic valve unit 73 from above, and no maintenance space is required between the hydraulic valve unit 73 and the HST52 in the machine width direction Y.

[0045] As described above, in the aircraft width direction Y, the width L1 between the first support frame 41 and the second support frame 42 is arranged to be greater than the width L2 between the first beam frame 7a and the second beam frame 7b. More specifically, the first beam frame 7a and the second beam frame 7b are provided with a first extension portion 7c and a second extension portion 7d, respectively, which extend in opposite directions in the aircraft width direction Y, and the first support frame 41 and the second support frame 42 are erected from these first extension portion 7c and second extension portion 7d, respectively. Furthermore, the first support frame 41 is positioned on the opposite side of the floor panel 76 from the second support frame 42 in the aircraft width direction Y, that is, to the right of the floor panel 76. The second support frame 42 is positioned on the opposite side of the floor panel 76 from the first support frame 41 in the aircraft width direction Y, that is, to the left of the floor panel 76.

[0046] In this way, the first support frame 41 and the second support frame 42 are provided so as to be erected directly from the highly rigid aircraft frame 7 and at a wider spacing than the width of the floor panel 76, thereby improving the frame rigidity of the driving frame unit 40, which is the frame of the operating unit 9. Furthermore, a radiator frame 43 and a cover frame 44 are provided at the rear of the driving frame unit 40, and by connecting these radiator frame 43 and cover frame 44 to the first support frame 41 and the second support frame 42, the overall frame rigidity of the driving frame unit 40 can be improved.

[0047] Furthermore, by increasing the frame rigidity of the driving frame unit 40, it becomes unnecessary to connect the driving frame unit 40, particularly the second support frame 42, to the transmission case 51 to increase the frame rigidity of the driving frame unit 40. As a result, vibrations and noise from the transmission case 51 are suppressed from being transmitted to the driving frame unit 40 and to the operator seated in the seat 31 of the driving control unit 9. Moreover, because the driving frame unit 40 has a simple configuration, the number of parts and assembly man-hours can be reduced, and the weight of the combine harvester 1 can be reduced.

[0048] Furthermore, by making the width L1 between the first support frame 41 and the second support frame 42 relatively wide, the space below the floor panel 76 can be effectively utilized. Below the floor panel 76, a hydraulic valve unit 73 is positioned, and the connection port 73a of the hydraulic valve unit 73 is configured to open upward. Therefore, by removing the floor panel 76, the hydraulic valve unit 73 can be accessed from the operating unit 9 side through the opening 75a of the floor support member 75, which is exposed, thereby improving the maintainability of the hydraulic valve unit 73. In addition, the battery 64 and oil filter 66 are positioned in the space below the floor panel 76 and in front of the hydraulic valve unit 73, effectively utilizing dead space and improving access to the battery 64 and oil filter 66.

[0049] <Other embodiments> In this embodiment, the connection port 73a of the hydraulic valve unit 73 was open upwards, but it is not limited to this. The connection port 73a may be open in any direction other than the direction opposite to the HST 52 (left direction), for example, it may be open forward, to the right, backward, or downward.

[0050] Furthermore, although the combine harvester 1 in this embodiment was equipped with a crawler track system 2, it is not limited to a crawler track system 2; a track system including tires may also be used.

[0051] Furthermore, in this embodiment, the second support frame 42 was positioned to overlap the HST52 when viewed in the longitudinal direction X of the aircraft body, but this is not limited to this. For example, the HST52 may be positioned at an offset location from the HST52.

[0052] Furthermore, although a floor support member 75 is provided below the floor panel 76 in this embodiment, the floor support member 75 may be omitted. Other members may be placed between the floor panel 76 and the hydraulic valve unit 73. In other words, it is sufficient that the hydraulic valve unit 73 can be accessed from the operating unit 9 by removing the floor panel 76 or other members below the floor panel 76.

[0053] Furthermore, in this embodiment, the first beam frame 7a and the second beam frame 7b are provided with a first extension section 7c and a second extension section 7d, respectively, but the embodiment is not limited to this. That is, the first beam frame 7a and the second beam frame 7b may be provided at a wider interval than the floor panel 76, and the first support frame 41 and the second support frame 42 may be erected directly from the first beam frame 7a and the second beam frame 7b, respectively.

[0054] Furthermore, in this embodiment, the oil filter 66 is supported by the second support frame 42, but this is not limited to this. For example, other auxiliary equipment may be supported in addition to the oil filter 66, or the oil filter 66 may be supported in a location other than the second support frame 42.

[0055] Furthermore, although the above-described embodiment describes a self-propelled combine harvester, it is also applicable to a general-purpose combine harvester. [Explanation of symbols]

[0056] 1: Combine harvester 2: Running gear (crawler running gear) 7: Aircraft Frame 7a: First beam frame 7b: Second beam frame 7c: 1st extension part 7d: 2nd extension part 9: Operation Unit 31: Seat 41: First support frame 42: Second support frame 51: Mission Case 52: Hydrostatic continuously variable transmission (HST) 62: Front Panel 66a,81: Hydraulic hoses 73: Hydraulic valve unit 73a: Connection port 75: Floor support member 75a: Opening 76: Floor Panel X: Front and rear direction of the aircraft Y: Aircraft width direction

Claims

1. In a combine harvester that cuts and threshes grain while moving, Traveling device and The machine frame supported by the aforementioned traveling device, The engine mounted on the aforementioned aircraft frame, A transmission case connected to the aforementioned travel device, A hydrostatic continuously variable transmission fixed to the transmission case transmits power from the engine to the running gear in a stepless manner, The operating controls include the seat where the operator sits, The floor panel forming the floor surface of the aforementioned operating unit, A front panel is positioned in front of the aforementioned seat and floor panel and covers the front of the driver's control panel, A hydraulic valve unit located below the floor panel has a connection port that connects to the hydrostatic continuously variable transmission via a hydraulic hose, It comprises a first support frame and a second support frame that are erected from the aforementioned aircraft frame and support the front panel, The connection port of the hydraulic valve unit opens in a direction different from the direction facing the hydrostatic continuously variable transmission. The first support frame is positioned in front of the hydrostatic continuously variable transmission and is positioned on the opposite side of the second support frame from the floor panel in the width direction of the machine body. The second support frame is positioned in front of the hydrostatic continuously variable transmission and, in the width direction of the machine body, on the opposite side from the first support frame with the floor panel in between, and between the transmission case and the hydraulic valve unit. A combine harvester characterized by the following features.

2. The second support frame is positioned so as to overlap the hydrostatic continuously variable transmission when viewed in the front-to-rear direction of the machine. The combine harvester as described in feature 1.

3. The floor support member further comprises an opening, is supported by the first support frame and the second support frame, and detachably supports the floor panel. The connection port of the hydraulic valve unit opens upward and is accessible from above the floor support member through the opening. The combine harvester as described in feature 1.

4. The aforementioned aircraft frame is, A first beam frame and a second beam frame, each extending in the longitudinal direction of the aircraft and arranged side by side in the width direction of the aircraft, A first extension portion extending from the first beam frame in the width direction of the machine body on the side opposite to the second beam frame, It has a second extension portion that extends from the second beam frame in the width direction of the machine body on the side opposite to the first beam frame, The first support frame is erected from the first extension section, The second support frame is erected from the second extension section. A combine harvester according to any one of claims 1 to 3.

5. It is further equipped with an oil filter connected via a hydraulic hose to the hydrostatic continuously variable transmission, which removes foreign matter from the hydraulic fluid of the hydrostatic continuously variable transmission. The oil filter is supported by the second support frame. A combine harvester according to any one of claims 1 to 3.

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