JP7703744B2 - Fuel supply device for working machine and harvesting machine - Google Patents

Description

The present invention relates to a fuel supply device for a work machine having a power unit that is driven by a fuel supply, and a harvesting machine.

As a related art, a combine harvester equipped with a harvesting section, a threshing section, a grain tank, etc. is known (see, for example, Patent Document 1). In a work machine such as a combine harvester according to the related art, a power section (engine) and a fuel tank are mounted on the machine body (traveling machine body), and fuel is supplied from the fuel tank (first fuel tank and second fuel tank) to the power section to drive the power section.

In a work machine according to the related art, one fuel tank (first fuel tank) is disposed at the rear of the machine body between the threshing section and the grain tank, which are arranged side by side in the left-right direction. Furthermore, a filter device (oil-water separator) that removes moisture contained in the fuel supplied to the power section is disposed in front of this fuel tank (first fuel tank). Therefore, the filter device is located in an area surrounded by the threshing section, the grain tank, and the fuel tank (first fuel tank).

JP 2018-19625 A

In the configuration of the related art described above, when a user wants to access the filter device for maintenance, the grain tank must be rotated and moved to an open position to expose the filter device. In other words, the grain tank must be opened and closed each time maintenance is performed on the filter device.

The object of the present invention is to provide a fuel supply device for a work machine and a harvesting machine that allows for labor-saving maintenance of a filter device.

A fuel supply device for a work machine according to one aspect of the present invention includes a fuel tank and a filter device. The fuel tank is mounted on the body of the work machine and stores fuel. The filter device is mounted on the body and inserted into a supply path of the fuel to a power unit of the work machine to remove objects in the fuel. The filter device is fixed to a stay that fixes the fuel tank to the body.

A harvesting machine according to another aspect of the present invention includes a fuel supply device for the work machine and the machine body.

The present invention provides a fuel supply device for a work machine and a harvesting machine that allows for labor-saving maintenance of a filter device.

FIG. 1 shows a fuel supply device for a work machine according to a first embodiment, and is a schematic perspective view of a fuel tank and its surroundings as viewed diagonally from the left rear. FIG. 2 is a schematic left side view of the work machine according to the first embodiment. FIG. 3 is a schematic plan view of the work machine according to the first embodiment. FIG. 4 shows the fuel supply device for a work machine according to the first embodiment, and is a schematic perspective view of the periphery of the fuel tank as viewed diagonally from the rear right. FIG. 5 is a schematic plan view showing the fuel supply device for a work machine according to the first embodiment. FIG. 6 is a schematic plan view showing a frame of the body of the work machine according to the first embodiment. FIG. 7 shows the frame of the machine body of the work machine according to the first embodiment, and is a schematic perspective view of the rear portion as viewed diagonally from the rear left. FIG. 8 shows the fuel supply device for a work machine according to the first embodiment, and is a schematic perspective view of the periphery of the fuel tank as viewed diagonally from the rear left. FIG. 9 is a schematic plan view showing the fuel supply device for a work machine according to the first embodiment. FIG. 10 is a schematic three-view diagram showing the fuel tank of the fuel supply device for a work machine according to the first embodiment. FIG. 11 shows the fuel supply device for a work machine according to the first embodiment, and is a schematic perspective view of the periphery of the fuel tank as viewed diagonally from the rear right with the filter device 3 removed.

The following describes an embodiment of the present invention with reference to the attached drawings. The following embodiment is an example of the present invention and is not intended to limit the technical scope of the present invention.

(Embodiment 1)
[1] Overall configuration First, the overall configuration of the work machine 4 according to this embodiment will be described with reference to Figures 2 and 3. The work machine 4 has at least a power section 46 that is driven by a supply of fuel. The fuel supply device 10 for a work machine according to this embodiment (see Figure 1) is mounted on a body 40 of such a work machine 4.

In this disclosure, the term "working machine" refers to a machine that performs various tasks in a work area such as a farm field, and examples of such tasks include harvesting machines (including combines), tractors, rice transplanters, spreaders, sprayers, sowing machines, transplanters, and other work vehicles. In other words, the working machine 4 includes a working vehicle. The working machine 4 is not limited to a "vehicle" and may be, for example, a work flying object or a work vessel. Furthermore, the working machine 4 is not limited to an agricultural machine (farm machinery) and may be, for example, a construction machine (construction machinery). In this embodiment, unless otherwise specified, the working machine 4 is described as a riding type harvesting machine.

The "harvesting machine" in this disclosure is a machine that harvests crops in a field, and includes, as an example, a combine harvester (combine harvester) that performs threshing and sorting in addition to harvesting. Combine harvesters are mainly used for harvesting grains, and while moving (traveling) in a field, they harvest crops and harvest the harvested crops. In particular, there are normal (general-purpose) combine harvesters that feed the entire harvested crop to a thresher, and self-feeding combine harvesters that feed only the tips of the harvested crop to the thresher. In this embodiment, a normal combine harvester that harvests rice grown in an outdoor field (rice field) is described as an example of the working machine 4. In this embodiment, as an example, the working machine 4 is operated by a person (operator) (including remote operation), but the working machine 4 may be an unmanned machine that operates by automatic driving.

In this embodiment, for the sake of convenience, the vertical direction when the work machine 4 is in a usable state is defined as the up-down direction D1. Furthermore, as shown in FIG. 3, the front-rear direction D2 and the left-right direction D3 are defined based on the direction as seen by a person riding on the work machine 4 (the driving part 47 of the work machine 4). In other words, each direction used in this embodiment is a direction defined based on the body 40 of the work machine 4, and the direction in which the body 40 moves when the work machine 4 moves forward is "forward", and the direction in which the body 40 moves when the work machine 4 moves backward is "rear". Similarly, the direction in which the front end of the body 40 moves when the work machine 4 turns right is "rightward", and the direction in which the front end of the body 40 moves when the work machine 4 turns left is "leftward". However, these directions are not intended to limit the direction of use of the work machine 4 (direction during use).

In addition to the power unit 46, the work machine 4 according to this embodiment is equipped with a traveling device 41, a reaping unit 42, a threshing unit 43, a sorting unit 44, a storage device 45, a driving unit 47, a straw processing unit 48, and a discharge device 49, etc., in the machine body 40. Furthermore, in this embodiment, the work machine 4 is further equipped with a control device, a communication terminal, a battery, etc., in the machine body 40. Furthermore, in this embodiment, the work machine 4 is further equipped with a fuel supply device 10 for the work machine (hereinafter also simply referred to as the "fuel supply device"). That is, the machine body 40, which is the main body of the work machine 4, includes the traveling device 41, the reaping unit 42, the threshing unit 43, the sorting unit 44, a storage device 45, a power unit 46, a driving unit 47, a straw processing unit 48, and a discharge device 49, etc. And the fuel supply device 10 according to this embodiment, together with the machine body 40, constitutes the work machine 4 as a harvesting machine. In other words, the harvesting machine (working machine 4) according to this embodiment includes a fuel supply device 10 for the working machine and a machine body 40.

The traveling device 41 can move the work machine 4 in the forward/backward direction D2 and the left/right direction D3. For example, the work machine 4 performs harvesting work while meandering through a field such as a rice paddy or farmland. As one example, the work machine 4 may move through the field while turning right (or left) from the outside to the inside, in which case the movement trajectory of the work machine 4 will be a spiral path.

The reaping unit 42 reaps crops (rice, as an example in this embodiment) in the field. The reaping unit 42 has a reel 421, a cutter 422, a raking auger 423, a transport conveyor 424, a rotor 425, a feeder house 426, and the like. The reel 421 guides the culms of the crop to the cutter 422 by rotating. The cutter 422 cuts the culms guided by the reel 421. As a result, the crops growing in the field are cut midway through the culms, and at least the culms including the tips are harvested by the work machine 4.

The raking auger 423 raks the harvested stalks into the feeder house 426. Specifically, the raking auger 423 is a lateral feed screw that transports the harvested stalks in the left-right direction D3 and collects them at a position in front of the feeder house 426.

The feeder house 426 forms the outer periphery of a path for passing the harvested crop (grain stalks) between the harvesting unit 42 (the raking auger 423) and the threshing unit 43. In this embodiment, the threshing unit 43 is located diagonally above and behind the harvesting unit 42. As an example, the feeder house 426 is a hollow cylinder (square cylinder) with a rectangular cross section, and is arranged to extend diagonally upward from the harvesting unit 42 toward the threshing unit 43. The grain stalks harvested by the harvesting unit 42 are raked into the feeder house 426 through an intake opening on the front side of the feeder house 426, and are sent to the threshing unit 43 through the internal space of the feeder house 426.

The transport conveyor 424 is disposed inside the feeder house 426. The transport conveyor 424 transports the stalks that are collected by the shoveling auger 423 at a position in front of the intake of the feeder house 426 and shoveled into the feeder house 426 from the intake, through the inside of the feeder house 426 to the rotor 425. The rotor 425 sends the stalks transported by the transport conveyor 424 to the threshing section 43.

The threshing section 43 performs a threshing process on the stalks harvested by the harvesting section 42. In the threshing process, the threshed grains, which contain grains, are separated from the stalks. The threshed grains fall from the threshing section 43 to the sorting section 44 below.

The sorting unit 44 executes a sorting process to sort grains from the threshed grains that fall from the threshing unit 43. The sorting unit 44 sorts grains from the threshed grains, for example, by blowing air diagonally from below the threshed grains and sifting the threshed grains.

The threshing unit 43, for example, performs a threshing process on the stalks while transporting the stalks from the front to the rear of the threshing unit 43. Similarly, the sorting unit 44, for example, performs a sorting process on the stalks while transporting the stalks from the front to the rear of the sorting unit 44.

The storage device 45 has a vertical transport duct 451, a vertical transport conveyor 452, a grain tank 453, etc. The vertical transport duct 451 is a duct that connects the sorting section 44 and the upper inlet of the grain tank 453. The vertical transport conveyor 452 is a screw conveyor that rotates within the vertical transport duct 451 to transport grains from the sorting section 44 to the grain tank 453.

That is, the grain tank 453 is a tank (container) for storing threshed grains (grains, etc.) obtained by the threshing process in the threshing section 43. The grain tank 453 is arranged in line with the threshing section 43 in the left-right direction D3, which is the width direction of the machine body 40. In this embodiment, as an example, when the machine body 40 is divided into two approximately equally in the left-right direction D3, the threshing section 43 (and the sorting section 44) is located on the left side, and the grain tank 453 (storage device 45) is located on the right side. In short, the machine body 40 has the threshing section 43 and the grain tank 453 arranged in the left-right direction D3 on either side of the imaginary straight line VL1 in a top view. The imaginary straight line VL1 is an imaginary straight line extending along the front-rear direction D2 through between the threshing section 43 and the grain tank 453, as shown by an imaginary line (two-dot chain line) in FIG. 3, and does not have a substance. The threshing section 43 and the grain tank 453 are located on both sides of the imaginary straight line VL1 in the left-right direction D3 when viewed from above (plan view).

The discharge device 49 discharges the grains in the grain tank 453 to any location around the work machine 4. The discharge device 49 has a discharge conveying path 490 and a conveying mechanism 493. The discharge conveying path 490 is a path for discharging the stored matter (grains) in the grain tank 453. The discharge conveying path 490 includes a vertical conveying path 491 extending in the vertical direction D1 and a horizontal conveying path 492 extending in a direction perpendicular to the vertical direction D1 (horizontal direction). The lower end of the vertical conveying path 491 is connected to the grain tank 453, and the upper end of the vertical conveying path 491 is connected to the horizontal conveying path 492. As a result, the stored matter in the grain tank 453 is conveyed upward through the vertical conveying path 491, and further conveyed horizontally through the horizontal conveying path 492, and discharged from the tip of the horizontal conveying path 492.

The vertical conveying path 491 also functions as a rotation axis when the grain tank 453 is opened or closed. In other words, the grain tank 453 is configured to be rotatable in a horizontal plane around the central axis of the vertical conveying path 491. This allows the grain tank 453 to move (rotate) between a closed position and an open position, and by placing the grain tank 453 in the open position, for example, when performing maintenance on the oscillating bearing 441 (see Figure 4) of the sorting section 44, it is easier to secure work space for maintenance, etc. Figure 3 and other figures show the grain tank 453 in the closed position.

The conveying mechanism 493 is, for example, a screw (auger) that rotates within the discharge conveying path 490 to convey the grains through the discharge conveying path 490. In other words, within the vertical conveying path 491, the vertical auger as the conveying mechanism 493 rotates to convey the grains, and within the horizontal conveying path 492, the horizontal auger as the conveying mechanism 493 rotates to convey the grains.

The straw processing section 48 discharges waste straw and other waste materials generated during the threshing process. In other words, the straw and other materials separated from the threshing grains (including grains) during the threshing process in the threshing section 43 are transported to the straw processing section 48 as waste materials. The straw processing section 48 has a discharge outlet 481 (see FIG. 4) for discharging the waste materials outside the machine body 40. The straw processing section 48 is, for example, disposed behind the threshing section 43, that is, at the left rear of the machine body 40, and the discharge outlet 481 opens toward the rear. The straw processing section 48 has a straw cutter or the like, and performs cutting processing on the waste materials before discharging the waste materials from the discharge outlet 481. However, it is not essential that the straw processing section 48 performs cutting processing or the like.

The power unit 46 is the drive source for the traveling device 41, the harvesting device 42, the threshing device 43, the sorting device 44, the storage device 45, the straw processing device 48, and the discharge device 49. The power unit 46 has an engine, such as a diesel engine, as a power source. The power unit 46 may also have a hybrid power source that includes an engine and a motor (electric motor).

The driving unit 47 is provided with a driver's seat where the operator sits, as well as operating devices such as a steering wheel, various operating levers, and various operating switches operated by the operator. In this embodiment, the driving unit 47 is disposed in front of the grain tank 453 on the right side of the body 40 of the work machine 4 (see FIG. 3). Furthermore, the driving unit 47 is located behind the reaping unit 42 and above the power unit 46 (see FIG. 2).

The control device controls the traveling device 41, the harvesting unit 42, the threshing unit 43, the sorting unit 44, the storage device 45, the power unit 46, the straw processing unit 48, and the discharge device 49, etc., in response to operations received by the operating device. For example, the operating device includes an engine ON/OFF key, and the control device starts the engine of the power unit 46 when the engine ON/OFF key is switched on, and stops the engine when the engine ON/OFF key is switched off.

The communication terminal communicates with a server or the like outside the work machine 4. Here, the communication terminal appropriately transmits information on the operating status of the work machine 4, the current position of the work machine 4, the crop yield, the taste of the crop (including the protein content or moisture content, etc.), the work time or work efficiency, etc. to the server or the like. In this embodiment, the communication terminal is configured to be able to detect the current position of the work machine 4 using a satellite positioning system such as GNSS (Global Navigation Satellite System). The communication terminal may also receive control information related to the driving assistance or automatic driving of the work machine 4 from the server or the like. As an example, information on the harvest amount (yield data) can be obtained by detecting the amount of harvested grains using a sensor (grain sensor) provided on the work machine 4. As an example, this type of sensor includes an impact detection unit such as a strain gauge or a piezoelectric element attached to the upper surface of the grain tank 453, and detects the impact force when the grains transported by the vertical transport conveyor 452 toward the grain tank 453 collide with the impact detection unit. Of course, the method for obtaining the harvest yield of the work machine 4 is not limited to this.

The communication terminal communicates with a server or the like outside the work machine 4. Here, the communication terminal appropriately transmits information on the operating status of the work machine 4, the current position of the work machine 4, the crop yield, the taste of the crop (including the protein content or moisture content, etc.), the work time or work efficiency, etc. to the server or the like. In this embodiment, the communication terminal is configured to be able to detect the current position of the work machine 4 using a satellite positioning system such as GNSS (Global Navigation Satellite System). The communication terminal may also receive control information related to the driving assistance or automatic driving of the work machine 4 from the server or the like. As an example, information on the harvest amount (yield data) can be obtained by detecting the amount of harvested grains using a sensor (grain sensor) provided on the work machine 4. As an example, this type of sensor includes an impact detection unit such as a strain gauge or a piezoelectric element attached to the upper surface of the grain tank 453, and detects the impact force when the grains transported by the vertical transport conveyor 452 toward the grain tank 453 collide with the impact detection unit. Of course, the method for obtaining the harvest yield of the work machine 4 is not limited to this.

The machine body 40 of the work machine 4 also includes a frame 5 (see FIG. 6, etc.) as a structural member. The frame 5 is constructed by combining multiple frame materials (e.g., metal pipes, etc.). In this embodiment, the frame 5 extends in a planar manner along a horizontal plane to form a platform. The traveling device 41, the reaping section 42, the threshing section 43, the sorting section 44, the storage device 45, the power section 46, the driving section 47, the straw processing section 48, and the discharge device 49 are mounted on the frame 5. The machine body 40 moves together with the frame 5 within the field by the traveling device 41. Therefore, the frame 5 has sufficient strength (rigidity) to support heavy objects such as the threshing section 43.

[2] Configuration Related to the Fuel Supply System Next, the configuration related to the fuel supply system 10 in the work machine 4 according to this embodiment will be described with reference to Figs. 1 and 4 to 9.

The fuel supply device 10 is a device (system) that supplies fuel to the power unit 46 for driving the power unit 46. The fuel supplied by the fuel supply device 10 is appropriately selected from fuels suited to the power unit 46, such as diesel or gasoline. In this embodiment, as an example, the power unit 46 has a diesel engine as a power source. Therefore, the fuel supplied to the power unit 46 by the fuel supply device 10 is diesel.

As shown in FIG. 1, the fuel supply device 10 includes a fuel tank 11 and a piping system 2. The fuel supply device 10 stores a predetermined amount of fuel in the fuel tank 11 and supplies the fuel to the power unit 46 through the piping system 2. The fuel tank 11, piping system 2, and other components of the fuel supply device 10 are fixed to the frame 5 of the machine body 40, and are thus mounted on the machine body 40 of the work machine 4.

The fuel tank 11 is disposed on the outer periphery of the aircraft 40 when viewed from above (plan view) so that fuel can be replenished as needed, and has a fuel filler port 101 facing outward. In this embodiment, as an example, the fuel tank 11 is disposed at the rear end of the aircraft 40, and the fuel filler port 101 is provided at the rear end of the fuel tank 11. Figure 1 shows the fuel filler port 101 in a closed state with a fuel filler cap 102 attached to it.

The fuel supply device 10 according to this embodiment further includes a filter device 3. The filter device 3 is inserted into the fuel supply path (piping system 2) to the power unit 46, and removes objects contained in the fuel. Objects that the filter device 3 removes include, for example, impurities such as moisture contained in the fuel, and foreign matter such as dust in the fuel. By including such a filter device 3, the fuel supply device 10 can supply pure fuel from which objects such as moisture have been removed to the power unit 46.

However, regarding the placement of such a filter device 3, if the filter device 3 is placed at the back of the fuel tank 11, for example, as in the related art described above, the user will need to open and close the grain tank 453 to access the filter device. In particular, it is recommended that the filter device 3 be maintained on a daily basis, such as by periodically replacing the filter, and if the grain tank 453 needs to be opened and closed each time maintenance is performed on the filter device 3, this can be a burden on the user.

In this embodiment, by adopting the configuration described below, a fuel supply device 10 for a work machine and a harvesting machine (work machine 4) are realized that enable labor-saving maintenance of the filter device 3.

That is, the fuel supply device 10 for a work machine according to this embodiment includes a fuel tank 11 and a filter device 3, as shown in Figures 1, 4, and 5. The fuel tank 11 is mounted on the body 40 of the work machine 4 and stores fuel. The filter device 3 is mounted on the body 40 and inserted into a fuel supply path (piping system 2) to the power unit 46 of the work machine 4 to remove objects in the fuel. Here, the filter device 3 is positioned on the opposite side of the center C1 of the body 40 with respect to the fuel tank 11 when viewed from above (in a plan view).

In other words, as shown in FIG. 5, the filter device 3 is arranged so that the fuel tank 11 is located between the filter device 3 and the center C1 of the aircraft 40 in a top view (plan view) of the aircraft 40 viewed from above. In other words, the filter device 3 is arranged outside (on the outer periphery) of the aircraft 40 relative to the fuel tank 11 in a top view. In this embodiment in particular, since the fuel tank 11 is arranged at the rear end of the aircraft 40 as described above, the filter device 3 is arranged further rearward of the fuel tank 11. In FIG. 5, the center C1 of the aircraft 40 in a top view (plan view) is shown diagrammatically, but the dot (circle) indicating the center C1 is not intended to indicate that there is a structure at the center C1.

According to the above configuration, since the filter device 3 is disposed outside the fuel tank 11 (on the outer periphery of the aircraft body 40), the filter device 3 can be easily accessed from outside the aircraft body 40 during maintenance of the filter device 3. In other words, when a user accesses the filter device 3 from outside the aircraft body 40, the filter device 3 is located at least in front of the fuel tank 11, so access to the filter device 3 is less likely to be obstructed by the fuel tank 11, making it easier for the user to access the filter device 3. As a result, the user can easily access the filter device 3 without having to open and close the grain tank 453, for example, and this makes it possible to reduce the labor required for maintenance of the filter device 3.

Furthermore, by omitting the maintenance of the filter device 3, not only is the burden on the user reduced, but the frequency of maintenance of the filter device 3 can also be expected to increase. This makes it easier to perform proper maintenance of the filter device 3 and easier to supply clean fuel to the power unit 46, which leads to improved drive efficiency of the power unit 46 and ultimately a longer life for the power unit 46.

The specific configuration of the fuel supply device 10 according to this embodiment is described below.

In this embodiment, as shown in Figs. 1 and 5, the fuel supply device 10 further includes a separate fuel tank 12 in addition to the fuel tank 11, the piping system 2, and the filter device 3. The separate fuel tank 12 constitutes a fuel tank set 1 together with the fuel tank 11. In other words, the fuel supply device 10 according to this embodiment includes a fuel tank set 1 consisting of multiple fuel tanks, the fuel tank 11 and the separate fuel tank 12, as fuel tanks that contain fuel. As an example in this embodiment, the separate fuel tank 12 (second fuel tank) has a larger capacity (capacity of fuel that can be contained) than the fuel tank 11 (first fuel tank).

The fuel tank 11 and the separate fuel tank 12 are both mounted on the frame 5 of the aircraft 40. The fuel tank 11 and the separate fuel tank 12 are arranged side by side in the left-right direction D3. In other words, the fuel tank 11 and the separate fuel tank 12 constituting the fuel tank set 1 are both arranged at the rear end of the aircraft 40. In this embodiment, as an example, the fuel tank 11 is arranged to the right of the separate fuel tank 12. The internal spaces of the fuel tank 11 and the separate fuel tank 12 are connected by a communication pipe 13. Therefore, the fuel tank set 1 functions as a fuel tank having a capacity equal to the combined capacity of the fuel tank 11 and the separate fuel tank 12.

The fuel tank 11 is located at the rear end of the machine body 40, between the grain tank 453 and the threshing section 43. The separate fuel tank 12 is located below the rear end of the threshing section 43. The rear surface (back surface) of the threshing section 43 is provided with an outlet 481 (see Figure 4) of the straw processing section 48, so the separate fuel tank 12 is located below the straw processing section 48 (outlet 481) (see Figure 8).

The fuel tank 11 is disposed between the grain tank 453 and the threshing section 43, so the space between the grain tank 453 and the threshing section 43 can be effectively utilized. In addition, the separate fuel tank 12 is disposed below and at the rear of the threshing section 43, so the space below the threshing section 43 can be effectively utilized. In addition, because the fuel tank set 1 is divided into the fuel tank 11 and the separate fuel tank 12, it is possible to ensure a large capacity for the fuel tank set 1 as a whole while effectively utilizing the empty space above the machine body 40 (frame 5) as described above.

As shown in FIG. 5, the piping system 2 has a first feed pipe 21, a second feed pipe 22, a feed pump 23, a third feed pipe 24, a first return pipe 25, a cooler 26, and a second return pipe 27. The first feed pipe 21 connects the separate fuel tank 12 and the filter device 3. The second feed pipe 22 connects the filter device 3 and the feed pump 23. The third feed pipe 24 connects the feed pump 23 and the power unit 46. The first return pipe 25 connects the power unit 46 and the cooler 26. The second return pipe 27 connects the cooler 26 and the fuel tank 11. Strictly speaking, the first return pipe 25 is connected to the feed pump in the power unit 46.

According to the piping system 2 configured as described above, the fuel in the fuel tank set 1 is supplied from the separate fuel tank 12 to the power unit 46 through the filter device 3 by the feed pump 23, and the surplus (surplus fuel) from the power unit 46 is returned to the fuel tank 11 by the feed pump in the power unit 46. That is, the fuel contained in the fuel tank set 1 is supplied to the power unit 46 from the separate fuel tank 12 of the fuel tank set 1 through the first feed pipe 21, the filter device 3, the second feed pipe 22, the feed pump 23, and the third feed pipe 24 in this order. On the other hand, the surplus fuel from the power unit 46 is returned to the fuel tank set 1 (fuel tank 11) through the first return pipe 25, the cooler 26, and the second return pipe 27 in this order.

In this embodiment, as an example, the filter device 3 is an oil-water separator that mainly removes moisture from the fuel. In other words, the filter device 3 removes moisture from the fuel sent from the fuel tank set 1 (separate fuel tank 12) through the first feed pipe 21 to the filter device 3, and outputs the fuel from which the moisture has been removed through the second feed pipe 22 to the power unit 46.

It is desirable to perform periodic maintenance on such a filter device 3. Specifically, as shown in FIG. 4, the filter device 3 has a cylindrical filter case 31 extending in the vertical direction D1, and a filter cap 32. The filter cap 32 is removably attached to the bottom surface of the filter case 31. The space surrounded by the filter case 31 and the filter cap 32 constitutes a filter housing chamber 33 for housing a replaceable filter. In other words, the internal space of the filter case 31 becomes the filter housing chamber 33, and the open surface (bottom surface) of the filter case 31 is covered by the filter cap 32.

When performing maintenance on the filter device 3, the user removes the filter cap 32 from the filter case 31 and takes out the filter from the filter housing chamber 33 from the opening (bottom) of the filter case 31. The user then inserts the cleaned filter or a new filter into the filter housing chamber 33 from the opening of the filter case 31 and attaches the filter cap 32 to the filter case 31. This replaces the filter in the filter housing chamber 33 with the cleaned filter or a new filter, completing the maintenance of the filter device 3.

The fuel supply device 10 configured as described above is mounted on the aircraft 40 by being supported by the frame 5 of the aircraft 40. Here, the specific configuration of the frame 5 will be described with reference to Figures 6 and 7.

As described above, the frame 5 is made up of a combination of multiple frame materials (e.g., metal pipes, etc.) and spreads out along a horizontal plane to form a platform. In particular, as a configuration around the fuel supply device 10, the frame 5 has a support frame 51, a rear frame 52, a horizontal frame 53, and a vertical frame 54, etc.

The support frame 51 has a length in the left-right direction D3 at the rear end of the aircraft 40. The rear frame 52 is disposed further rearward of the support frame 51 and has a length in the left-right direction D3. The horizontal frame 53 is disposed forward of the support frame 51 and has a length in the left-right direction D3. The vertical frame 54 is combined with the support frame 51 so as to intersect with the support frame 51 (perpendicular in this embodiment) and has a length in the front-rear direction D2. The vertical frame 54 is provided at least between the support frame 51 and the horizontal frame 53 and has the function of connecting the support frame 51 and the horizontal frame 53. In this embodiment, the support frame 51, the rear frame 52 and the horizontal frame 53 are connected together by a vertical pipe below the vertical frame 54, and constitute the frame 5. The multiple frame members that constitute the frame 5 are fixed to each other by means of, for example, welding, adhesives, or fastening using fasteners.

Here, the rear frame 52 is shorter than the support frame 51, and protrudes rearward from a portion of the support frame 51 in the longitudinal direction (left-right direction D3). In other words, although the rear frame 52 is arranged along the support frame 51, it is provided corresponding to only a portion of the rear frame 52, not the entire rear frame 52. As an example in this embodiment, the rear frame 52 is arranged behind the right half of the support frame 51 in the left-right direction D3. Here, the left end of the rear frame 52 is inclined forward, and its tip is connected to the support frame 51.

The rear frame 52 is thus provided so as to protrude rearward from at least a portion of the support frame 51, and functions as a bumper that absorbs impacts on the support frame 51. Furthermore, the rear frame 52 has a load receiving portion 521, as shown in FIG. 7. The load receiving portion 521 is located below the vertical conveying path 491 of the discharge device 49, and receives the load of the vertical conveying path 491 (including the vertical auger as the conveying mechanism 493). In other words, the rear frame 52 also has the function of supporting the vertical conveying path 491, which serves as the rotation axis of the grain tank 453.

The support frame 51 is also provided with a stay 6. The stay 6 is disposed in a position of the support frame 51 facing the rear frame 52 in the front-rear direction D2, and protrudes upward from the upper surface of the support frame 51. The stay 6 is fixed to the support frame 51 by means of, for example, welding, adhesive bonding, or fastening using a fastener. The stay 6 is used to secure the fuel tank 11.

The fuel supply device 10 is mounted on such a frame 5, for example, as shown in FIG. 1.

That is, in this embodiment, the fuel tank 11 is disposed on the support frame 51 and supported by the support frame 51. More precisely, the fuel tank 11 is disposed across the support frame 51 and the horizontal frame 53. Furthermore, the fuel tank 11 is disposed at the same position as the vertical frame 54 in the left-right direction D3. Therefore, the vertical frame 54 is located below the fuel tank 11.

In the example of FIG. 1, the fuel tank 11 is disposed on and supported by the support frame 51. More precisely, the fuel tank 11 is disposed straddling the support frame 51 and the horizontal frame 53. Here, the fuel tank 11 is fastened to the frame 5 by a fastening band 103 such as a metal band. One end of the fastening band 103 is held by a stay 6 provided on the support frame 51, and the other end of the fastening band 103 is held by the horizontal frame 53. Furthermore, the fuel tank 11 is disposed at a position overlapping with the vertical frame 54 in the left-right direction D3. Therefore, the vertical frame 54 is located below the fuel tank 11.

The separate fuel tank 12 is disposed on the support frame 51 to the left of the fuel tank 11, and is supported by the support frame 51, just like the fuel tank 11. More precisely, the separate fuel tank 12 is disposed across the support frame 51 and the horizontal frame 53. Here, the separate fuel tank 12 is fastened to the frame 5 by fastening bands 104, 105 such as metal bands. One end of the fastening bands 104, 105 is held by the support frame 51, and the other end of the fastening bands 104, 105 is held by the horizontal frame 53.

The filter device 3 is disposed in a position between the support frame 51 and the rear frame 52 in the frame 5, and is supported by the support frame 51. Here, it is sufficient that at least a portion of the filter device 3 is between the support frame 51 and the rear frame 52 when viewed from above (in a plan view), and it is not essential that the entire filter device 3 fits between the support frame 51 and the rear frame 52.

Specifically, the filter device 3 is fixed to the stay 6 arranged at a position of the support frame 51 facing the rear frame 52 in the front-rear direction D2. The filter device 3 is arranged on the back side (rear) of the stay 6 and fixed to the stay 6 using fasteners such as bolts. As a result, the filter device 3 is arranged in a manner that protrudes rearward from a position of the support frame 51 facing the rear frame 52 in the front-rear direction D2 when viewed from above.

More specifically, the stay 6 has a column portion 61 (see FIG. 7) having a length in the vertical direction D1, and a mounting plate 62 (see FIG. 7). A hole is formed in the column portion 61 for hooking an end of the fastening band 103, and one end of the fastening band 103 is held by the stay 6 by hooking one end of the fastening band 103 into this hole. The mounting plate 62 is fixed to the upper end of the column portion 61. The mounting plate 62 is a part for fixing the filter device 3, and the filter device 3 is fixed to the stay 6 by fixing the filter case 31 of the filter device 3 to the mounting plate 62 with a fastener such as a bolt. As an example, the mounting plate 62 is integrated with the column portion 61 by welding, but this is not limited thereto, and the mounting plate 62 may be seamlessly integrated with the column portion 61, for example.

In short, in this embodiment, the filter device 3 is fixed to the stay 6 that fixes the fuel tank 11 to the aircraft body 40. Therefore, compared to a case in which a member for fixing the filter device 3 is provided separately from the stay 6, the number of parts can be reduced, and the fuel supply device 10 can be arranged in a space-saving manner.

The piping system 2 is also appropriately fixed to the frame 5. Basically, the piping system 2, including the first feed pipe 21, the second feed pipe 22, the feed pump 23, the third feed pipe 24, the first return pipe 25, and the second return pipe 27, is preferably arranged above the frame 5, not below the frame 5. By arranging the piping system 2 on the frame 5, the piping system 2, including the first feed pipe 21 and the second feed pipe 22, can be protected by the frame 5 even if the bottom of the machine body 40 comes into contact with the ground due to, for example, the sinking of the machine body 40 in the field.

According to the above-described configuration, the filter device 3 is disposed on the opposite side of the center C1 of the aircraft 40 with respect to the fuel tank 11 in a top view (plan view). In this embodiment in particular, the filter device 3 is disposed behind the fuel tank 11. Therefore, the filter device 3 can be easily accessed from the rear of the aircraft 40 without the fuel tank 11 getting in the way.

In addition, in this embodiment, when performing maintenance on the filter device 3, the filter storage chamber 33 is accessed from below, and as shown in Figs. 1 and 4, the filter storage chamber 33 can be accessed through the gap between the support frame 51 and the rear frame 52. That is, in this embodiment, the filter device 3 is disposed at a position between the support frame 51 and the rear frame 52 in the frame 5. Therefore, the opening surface (lower surface) of the filter case 31 faces the gap between the support frame 51 and the rear frame 52, and the user can insert his/her hand into the filter storage chamber 33 from below through this gap. Here, the gap between the support frame 51 and the rear frame 52 has a dimension large enough for the user's hand to pass through and for the filter stored in the filter storage chamber 33 to pass through.

That is, in this embodiment, the aircraft 40 includes a support frame 51 that supports the fuel tank 11, and a rear frame 52 that is arranged along the support frame 51 behind the support frame 51. Here, the filter device 3 has a filter housing chamber 33 that can be accessed from below through the gap between the support frame 51 and the rear frame 52. In this way, the filter device 3 is arranged using the empty space (gap) between the support frame 51 and the rear frame 52, so that the filter device 3 can be arranged efficiently. Furthermore, since this gap is used to access the filter housing chamber 33 of the filter device 3, it is possible to replace the filter in the filter housing chamber 33 without removing the filter device 3 (the filter case 31) from the aircraft 40.

Furthermore, in this embodiment, as shown in FIG. 1 and FIG. 4, the filter device 3 is disposed behind the fuel tank 11, at a position where at least a portion of the filter device 3 faces the fuel tank 11 in the front-rear direction D2. That is, the filter device 3 and the fuel tank 11 at least partially overlap in the left-right direction D3. In other words, the filter device 3 and the fuel tank 11 are in a positional relationship where they at least partially overlap in the left-right direction D3 when viewed from the front (from the front) or in a rear view (from the rear). In this embodiment, as an example, the entire filter device 3 faces the fuel tank 11 in the front-rear direction D2. That is, the filter device 3 is disposed so as to fit within the width of the fuel tank 11 in the left-right direction D3. As a result, the width in the left-right direction D3 occupied by the filter device 3 and the fuel tank 11 can be kept small when viewed from above, and the filter device 3 can be disposed compactly.

In addition, in this embodiment, as shown in Figures 1 and 4, the fuel tank 11 has a recess 106 in a part of one side surface. At least a part of the filter device 3 is disposed in the recess 106. In this embodiment, as an example, the recess 106 is provided in a part of the rear surface 111 (see Figure 10), which is one side surface of the fuel tank 11. That is, the fuel tank 11 has a shape that is partially recessed in the recess 106 when viewed from above, and the filter device 3 is disposed in this recessed recess 106. Here, it is not essential that the entire filter device 3 is disposed in the recess 106, but it is sufficient that at least a part is disposed in the recess 106. In this embodiment, as an example, the front end of the filter device 3 protrudes from the recess 106. According to this configuration, the area on the aircraft 40 occupied by the filter device 3 and the fuel tank 11 can be kept small when viewed from above, and the filter device 3 can be disposed compactly.

In this embodiment, as shown in FIG. 4, the fuel tank 11 has a shielding portion 107. The shielding portion 107 is located between the exhaust port 481, which is provided on the machine body 40 and discharges waste generated during the threshing process, and the filter device 3. Specifically, the shielding portion 107 has a shape that protrudes from a part of one side of the fuel tank 11. In this embodiment, the recess 106 is provided on the right side of the rear surface 111 of the fuel tank 11, and the left side of the rear surface 111 of the fuel tank 11 protrudes relatively to the bottom surface of the recess 106. Therefore, the left side portion of the rear surface 111 of the fuel tank 11 protrudes backward to function as the shielding portion 107. In this embodiment, the filter device 3 is provided at the rear end of the machine body 40, and the filter device 3 is located near the exhaust port 481 of the straw processing section 48, which is also provided at the rear end of the machine body 40. By positioning the shielding portion 107 of the fuel tank 11 between the exhaust port 481 and the filter device 3, which are in close proximity in this manner, the exhaust port 481 and the filter device 3 are blocked by the shielding portion 107. This makes it difficult for the exhaust (such as straw) discharged from the exhaust port 481 to come into contact with the filter device 3, and the filter device 3 is protected from the exhaust.

The arrangement of the fuel tank 11 and filter device 3 of the fuel supply device 10 according to this embodiment will be defined below with reference to Figures 8 and 9 based on the relative relationship with the components of the machine body 40 mounted on the frame 5, such as the storage device 45 and the threshing unit 43. In Figures 8 and 9, the components of the machine body 40 mounted on the frame 5, such as the storage device 45 and the threshing unit 43, are shown diagrammatically by imaginary lines (double-dashed lines).

First, the fuel supply device 10 according to this embodiment includes a fuel tank 11 and a filter device 3. The fuel tank 11 is mounted on the body 40 of the work machine 4 and stores fuel. The filter device 3 is mounted on the body 40 and inserted into the fuel supply path (piping system 2) to the power unit 46 of the work machine 4 to remove objects in the fuel. The body 40 includes a threshing section 43 and a grain tank 453 arranged in the left-right direction D3 across the virtual straight line VL1 in a top view. In a top view, the filter device 3 is disposed between the vertical conveying path 491 extending in the up-down direction of the discharge conveying path 490 that discharges the accumulated matter in the grain tank 453 and the fuel tank 11. Such an arrangement of the filter device 3 can be adopted in addition to the arrangement on the opposite side of the center C1 of the body 40 with respect to the fuel tank 11 in a top view as described above. In other words, the filter device 3 may be located on the same side as the center C1 of the body 40 relative to the fuel tank 11 when viewed from above, as long as it is located between the vertical conveying path 491 and the fuel tank 11 when viewed from above.

8 and 9, the vertical conveying path 491 is disposed behind the grain tank 453. By disposing the filter device 3 between the vertical conveying path 491 and the fuel tank 11, the filter device 3 is disposed in a position that is easily accessible from outside the machine body 40. In other words, when a user accesses the filter device 3 from outside the machine body 40, the filter device 3 is disposed between the vertical conveying path 491 and the fuel tank 11, so that access to the filter device 3 is less likely to be obstructed by the fuel tank 11, and the user can easily access the filter device 3. As a result, the user can easily access the filter device 3 without having to open and close the grain tank 453, for example, and the maintenance of the filter device 3 can be reduced.

In addition, in this embodiment, the machine body 40 is equipped with a threshing section 43 and a grain tank 453 that are arranged in the left-right direction D3 on either side of the imaginary straight line VL1 when viewed from above. The fuel tank 11 is arranged on the imaginary straight line VL1. In other words, the fuel tank 11 is arranged at a position between the threshing section 43 and the grain tank 453 in the machine body 40. Here, the fuel tank 11 only needs to be on the imaginary straight line VL1 that passes between the threshing section 43 and the grain tank 453, and it is not essential that the entire fuel tank 11 fits between the threshing section 43 and the grain tank 453. In other words, it is sufficient that at least a part of the fuel tank 11 is between the threshing section 43 and the grain tank 453 in the left-right direction D3 when viewed from above (plan view). This allows the space between the grain tank 453 and the threshing section 43 to be effectively utilized.

[3] Specific Configuration of Fuel Tank Next, a specific configuration of the fuel tank 11 according to this embodiment will be described with reference to FIGS. 10 and 11. FIG.

Figure 10 is a schematic three-view diagram of the fuel tank 11 viewed from three directions. That is, Figure 10 shows the "right side view" of the fuel tank 11 viewed from the right, the "top view" of the fuel tank 11 viewed from above, and the "front view" of the fuel tank 11 viewed from the front. Figure 10 also shows the fuel tank 11 with the fuel filler cap 102 removed.

As is clear from FIG. 10, in this embodiment, the fuel tank 11 is formed in a substantially rectangular parallelepiped shape having six sides: a rear side 111, a front side 112, a right side 113, a left side 114, a top side 115, and a bottom side 116. Here, as an example, the fuel tank 11 is long in the front-rear direction D2, so that the longitudinal direction is the front-rear direction D2.

First, as described above, the fuel tank 11 has a recess 106 in part (the right side in this embodiment) of the rear surface 111, which is one side surface. This recess 106 forms an arrangement space Sp1 for arranging at least a part of the filter device 3. The fuel tank 11 also has a shielding portion 107 in part (the left side in this embodiment) of the rear surface 111, which is one side surface. When the fuel tank 11 is mounted on the aircraft 40, the shielding portion 107 provides a shield between the exhaust port 481 and the filter device 3.

In addition, in this embodiment, the fuel tank 11 has a larger dimension in the up-down direction D1 at the rear than at the front. That is, as is clear from the "right side view" of FIG. 10, the dimension H1 of the rear portion (rear portion) of the fuel tank 11 in the up-down direction D1 in the fore-and-aft direction D2 is larger than the dimension H2 of the front portion (front portion) in the up-down direction D1 (H1>H2). Moreover, by adopting a shape in which only the rear portion of the top surface 115 of the fuel tank 11 protrudes upward, the height of the top surface 115 at the front portion of the fuel tank 11 can be kept low. This makes it possible to increase the volume of the fuel tank 11 at the rear portion of the fuel tank 11 while keeping the height of the front portion of the fuel tank 11 low, making it easier to improve the capacity of the fuel tank 11.

According to such a shape of the upper surface 115, a space Sp3 is secured above the front of the fuel tank 11. And, according to this space Sp3, as shown in FIG. 11, for example, it is possible to leave the area in front of the swing bearing 441 of the sorting section 44 open, and the fuel tank 11 is less likely to get in the way even if the fuel tank 11 is not removed from the machine body 40 during maintenance of the swing bearing 441. As a result, the efficiency of maintenance of the work machine 4 can be improved. However, the shape of the upper surface 115 of the fuel tank 11 is not limited to the above shape, and may be, for example, a shape in which only the front part of the upper surface 115 of the fuel tank 11, or only the front and rear parts of the upper surface 115 of the fuel tank 11, protrude upward. In other words, the upper surface 115 of the fuel tank 11 is not limited to a shape in which the rear part protrudes, and only a part of it may protrude upward to avoid the swing bearing 441. Even in this case, the capacity of the fuel tank 11 can be improved while securing the space Sp3 above the fuel tank 11 to avoid the swing bearing 441.

Furthermore, the fuel tank 11 has a bottom recess 108 in a part of the bottom surface 116. The bottom recess 108 forms a piping space Sp2 in which piping is arranged between the fuel tank 11 and the frame 5 of the aircraft 40 on which the fuel tank 11 is mounted. In this embodiment, as an example, the bottom recess 108 is provided at the right end of the bottom surface 116 of the fuel tank 11. That is, when viewed from the front, the fuel tank 11 has a shape in which the bottom right corner is recessed by the bottom recess 108, and the piping space Sp2 is secured by the bottom recess 108 that is this recess. Here, it is not essential that the second feed pipe 22, etc., be entirely accommodated in the piping space Sp2, but it is sufficient that at least a part of the second feed pipe 22, etc. be accommodated.

In this embodiment, as shown in FIG. 11, the underside recess 108 ensures a piping space Sp2 for passing the piping system 2, such as the second feed pipe 22 (see FIG. 4), between the fuel tank 11 (underside 116) and the vertical frame 54 (upper surface) of the frame 5. Therefore, even when the fuel tank 11 is mounted on the frame 5, the piping system 2 can be placed on the frame 5, and the piping system 2 can be protected by the frame 5 even in a situation where the bottom of the aircraft 40 is in contact with the ground.

Incidentally, the configuration related to the shape of the fuel tank 11 as described above can be adopted alone. In other words, regardless of the arrangement of the filter device 3, or even if the filter device 3 is not present, the fuel tank 11 can adopt the configuration related to the recess 106, the shielding portion 107, the lower surface recess 108, and further the dimensions (H1, H2) in the vertical direction D1.

Other Embodiments
Other embodiments are listed below. The configurations according to the embodiments described below can be applied in appropriate combination with each other or with the various configurations described in the first embodiment.

The shapes and dimensions of the fuel tank 11 and the filter device 3 are not limited to those described in the first embodiment. For example, the filter device 3 is not limited to being cylindrical, and may be, for example, rectangular.

Furthermore, it is not essential that the fuel supply device 10 has a separate fuel tank 12, and the fuel supply device 10 may have only one fuel tank (fuel tank 11). Conversely, the fuel supply device 10 may have three or more fuel tanks.

Furthermore, the configuration related to the shape of the fuel tank 11 as described above is not essential. For example, even if the fuel tank 11 does not adopt at least one of the configurations related to the recess 106, the shielding portion 107, the lower surface recess 108, and the dimensions (H1, H2) in the vertical direction D1, the configuration related to the arrangement of the filter device 3 as described above can be applied.

The machine body 40 on which the fuel supply device 10 is mounted is not limited to the machine body 40 of a harvesting machine, but may be the machine body 40 of various types of work machines 4 other than harvesting machines. In this case, the threshing section 43 and the grain tank 453, etc., can be appropriately replaced with other configurations to match the work machine 4.

In addition, the arrangement of the fuel supply device 10, including the arrangement of the fuel supply device 10, in the left-right direction D3 or the front-rear direction D2 of the machine body 40 may be reversed from that in embodiment 1. For example, the grain tank 453 may be arranged to the left of the threshing section 43.

In addition, the filter device 3 does not necessarily have to be disposed on the opposite side of the center C1 of the aircraft 40 from the fuel tank 11 in a top view, as long as it is disposed behind the fuel tank 11 and at least a portion of it faces the fuel tank 11 in the fore-and-aft direction D2. In other words, by disposing the filter device 3 behind the fuel tank 11, access to the filter device 3 is less likely to be obstructed by the fuel tank 11, making it easier for the user to access the filter device 3. As a result, the user can easily access the filter device 3 without having to open and close the grain tank 453, for example, and this makes it possible to reduce the labor required for maintenance of the filter device 3.

<Notes on the invention>
A fuel supply device for a work machine according to one aspect of the present invention includes a fuel tank and a filter device. The fuel tank is mounted on a body of the work machine and stores fuel. The filter device is mounted on the body and inserted into a supply path of the fuel to a power unit of the work machine to remove objects in the fuel. The filter device is located on the opposite side of the fuel tank from the center of the body when viewed from above.

A fuel supply device for a work machine according to another aspect of the present invention includes a fuel tank and a filter device. The fuel tank is mounted on the body of the work machine and stores fuel. The filter device is mounted on the body and inserted into a fuel supply path to a power unit of the work machine to remove objects in the fuel. The body includes a threshing unit and a grain tank aligned in the left-right direction on either side of an imaginary straight line in a top view. The filter device is disposed between the fuel tank and a vertical conveying path that extends in the up-down direction of a discharge conveying path that discharges stored material in the grain tank in a top view.

A fuel supply device for a work machine according to another aspect of the present invention includes a fuel tank and a filter device. The fuel tank is mounted on the body of the work machine and stores fuel. The filter device is mounted on the body and inserted into a fuel supply path to a power unit of the work machine to remove objects in the fuel. The filter device is disposed behind the fuel tank, with at least a portion of the filter device facing the fuel tank in the fore-and-aft direction.

3 Filter device 4 Work machine (harvesting machine)
5 Frame 6 Stay 10 Fuel supply device for working machine 11 Fuel tank 33 Filter housing chamber 40 Machine body 43 Threshing section 46 Power section 51 Support frame 52 Rear frame 106 Recess 107 Shielding section 108 Underside recess 111 Rear surface (one side surface)
116 Underside 453 Grain tank 481 Discharge port 491 Vertical conveying path D1 Up-down direction D2 Front-rear direction D3 Left-right direction H1, H2 (Up-down) dimension Sp2 Piping space VL1 Imaginary straight line

Claims (3)

A fuel tank that is mounted on a body of the work machine and stores fuel;
a filter device that is mounted on the vehicle body and inserted into a fuel supply path to a power unit of the work machine to remove objects in the fuel,
the filter device is fixed to a stay that fixes the fuel tank to the airframe ,
the filter device is disposed on an opposite side of the center of the airframe with respect to the fuel tank in a top view,
The machine body includes a threshing section and a grain tank arranged in the left-right direction across a virtual straight line when viewed from above,
the fuel tank is disposed on the imaginary straight line,
the filter device is disposed behind the fuel tank and at least a portion of the filter device faces the fuel tank in the front-rear direction.
A fuel supply system for a work machine. The airframe comprises:
A support frame for supporting the fuel tank;
a rear frame disposed along the support frame behind the support frame,
The filter device has a filter accommodating chamber accessible from below through a gap between the support frame and the rear frame.
2. A fuel supply system for a work machine according to claim 1 . A fuel supply device for a work machine according to claim 1 or 2 ;
The airframe,
Harvesting machinery.

Images