JP2013194568A - Suction structure of fuel tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately suck fuel without sucking air at a suction part even when the amount of fuel in a fuel tank has been nearly exhausted.SOLUTION: A hollow storage 102 is provided at the bottom of a fuel tank 28, which sinks below the bottom to store fuel N. A covering body 103 is provided for covering the hollow storage 102 while allowing the fuel N to flow into the hollow storage 102. A suction part 101 is configured so that the fuel N stored in the hollow storage 102 is sucked and taken out.

Description

  The present invention relates to a fuel tank suction structure including a suction portion that sucks and takes out fuel in a fuel tank above a bottom portion of the fuel tank.

  The fuel tank suction structure as described above is employed in a work vehicle such as a tractor, for example. The fuel tank is formed to have a flat bottom, and a fuel supply pipe as a suction part is inserted into the fuel tank, and fuel is sucked and taken out through the fuel supply pipe. It is made to supply (for example, refer patent document 1). Then, the lower end portion of the fuel supply pipe is arranged close to the bottom portion of the fuel tank, so that the fuel can be sucked even when the fuel in the fuel tank decreases.

JP 2001-12326 A

In the fuel tank described in Patent Document 1, since the bottom portion has a certain width in the left-right direction and the front-rear direction, the fuel level also fluctuates when the fuel tank swings in the left-right direction and the front-rear direction. . Therefore, when the fuel in the fuel tank is low, there is a problem that the fuel does not exist at the lower end portion of the suction portion due to the fluctuation of the liquid level, and air is sucked in the suction portion.
In particular, in a tractor or the like, there is an operation of repeatedly moving back and forth, and in such an operation, the fuel tank is greatly shaken in the front-rear direction, and the problem that air is sucked in by the suction portion becomes significant.

  The present invention has been made paying attention to such a point, and the object thereof is to appropriately perform fuel suction without sucking air at the suction portion even when the fuel in the fuel tank decreases. It is in providing a fuel tank suction structure.

In order to achieve this object, the fuel tank suction structure according to the present invention is characterized in that the fuel tank suction includes a suction portion that sucks and takes out the fuel in the fuel tank above the bottom of the fuel tank. In structure
A depression storage section that is recessed below the bottom of the fuel tank and is capable of storing fuel; and a cover that covers the depression storage section in a state that allows fuel to flow into the depression storage section, The said suction part exists in the point comprised so that the fuel stored in the said hollow storage part may be drawn in and taken out.

  According to this characteristic configuration, since the depression storage section is provided at the bottom of the fuel tank, the depression storage section can store the fuel even when the amount of fuel decreases. And since the cover body covers the hollow storage part, even if the fuel tank swings in the left-right direction and the front-rear direction, the cover body prevents the fuel stored in the hollow storage part from flowing out to the outer side. Can be prevented. Therefore, even if the fuel tank is shaken in the left-right direction and the front-rear direction when the amount of fuel is low, the fuel can be stored in the recess storage part. Since the suction part sucks and takes out the fuel stored in the hollow storage part, even if the fuel in the fuel tank decreases, it is possible to suck the fuel appropriately without sucking air.

  A further characteristic configuration of the fuel tank suction structure according to the present invention is that the cover is configured to cover a central portion of the hollow storage portion in a plan view.

  According to this characteristic configuration, the cover body covers the central portion of the hollow storage portion, and therefore, between the outer peripheral portion of the cover body and the inner peripheral portion of the hollow storage portion over the entire length of the outer periphery of the cover body. An interval can be formed. Therefore, the inflow of fuel into the depression storage part can be allowed from this interval, and even when the amount of fuel decreases, the fuel can be appropriately stored in the depression storage part.

  The fuel tank suction structure according to the present invention is further characterized in that the suction portion is supported by the cover, and the cover supporting the suction portion is configured to be detachable from the fuel tank. There is in point.

  According to this configuration, the suction part and the cover can be attached together simply by attaching the cover supporting the suction part to the fuel tank, and the suction part and the cover can be easily attached. Can do. Moreover, also when removing a suction part and a cover body, a suction part and a cover body can be similarly removed together. And since the suction part is supported by the cover body, the relationship of the relative position of a suction part and a cover body can be adjusted only by adjusting the position which supports a suction part in a cover body. As a result, after adjusting the position for supporting the suction part with the cover, the cover body supporting the suction part is attached to the fuel tank, so that the recess storage part and the suction part can be easily attached at appropriate positions. can do.

  The fuel tank suction structure according to the present invention is further characterized in that the cover is configured by a cylindrical body having a hollow space communicating with the hollow storage portion, and the lower end portion of the cylindrical body is a flat surface. It is in a point that it is formed smaller than the dent storage part and is inserted into the dent storage part.

  According to this characteristic configuration, the cylindrical body as the cover body is arranged so that the lower end portion thereof is inserted into the hollow storage part, so that the hollow is swung even if the fuel tank swings in the left-right direction and the front-rear direction. Due to the presence of the cylindrical body inserted inside the storage section, it is possible to prevent the fuel level stored in the recess storage section from shaking. Therefore, it can prevent exactly that the fuel stored in the hollow storage part flows out to the outward side. In addition, fuel can be stored in the hollow space of the cylindrical body inserted into the hollow storage section, and a large amount of fuel can be secured by the suction section.

  A further characteristic configuration of the fuel tank suction structure according to the present invention is provided with an air discharge portion that can discharge the air in the hollow space to the outside of the cylindrical body at an upper portion of the cylindrical body. In the point.

  According to this feature configuration, even if the fuel stored in the hollow storage part contains air, the air rises in the hollow space of the cylindrical body and is discharged to the outside of the cylindrical body at the air discharge part. can do. Thereby, since air can be ventilated using a cylindrical body, it can prevent appropriately inhaling air in a suction part.

Side view of tractor Plan view showing the cabin interior Perspective view of fuel tank Cross section of fuel tank The perspective view which shows the principal part of a fuel tank The perspective view which shows arrangement | positioning of the various operation levers in a cabin Sectional view showing the main part of the auxiliary control lever Fuel tank suction structure in another embodiment Fuel tank suction structure in another embodiment

An example in which a fuel tank suction structure according to the present invention is applied to a tractor will be described with reference to the drawings.
As shown in FIG. 1, the tractor 1 includes a traveling vehicle body 4 having a pair of left and right steering operations and driveable front wheels 2 and a pair of left and right driveable rear wheels 3, and is configured as a four-wheel drive type. ing. A bonnet 6 in which an engine 5 and the like are installed is provided at the front portion of the traveling vehicle body 4, and a cabin 9 in which a steering handle 7, a driver seat 8, and the like are installed in the rear portion of the traveling vehicle body 4.

  A main frame 10 extends forward from the lower part of the engine 5, and an axle case (not shown) on which the front wheels 2 are mounted is supported on the main frame 10. A clutch housing 11 extends rearward from the engine 5, and a transmission case 12 located below the driver seat 8 is connected to the clutch housing 11 so that power from the engine 5 is transmitted to the rear wheel 3. It is configured.

  At the rear of the traveling vehicle body 4, a link mechanism 13 and a power take-out shaft 14 are provided that are constituted by a pair of left and right lift arms. Then, a rotary tiller (not shown) or the like is connected to the link mechanism 13 so as to be movable up and down, and a rotary tiller or the like is linked to the power take-out shaft 14 so that the rotary tiller can be lifted and driven. It is configured.

  Although not shown in the figure, the transmission case 12 includes, for example, a continuously variable transmission such as a hydrostatic continuously variable transmission and a gear transmission, and the power extracted from the engine 5 is not shown. Is transmitted to the continuously variable transmission via a main clutch or the like. Of the power extracted from the continuously variable transmission, the driving power is transmitted to the left and right front wheels 2 and the left and right rear wheels 3 via a gear transmission or the like. Of the power extracted from the continuously variable transmission, working power is transmitted to the power extraction shaft 14 via an action clutch (not shown).

  As shown in FIGS. 1 and 2, the cabin 9 includes a cabin frame 15, a windshield 16 that covers the front surface of the cabin frame 15, and a swingable door that is provided at entrances on both sides of the cabin frame 15. 17, a side glass 18 provided at the rear portion of the door 17, and a rear glass 19 that covers the rear surface of the cabin frame 15.

  The cabin frame 15 includes a square pipe-shaped support frame 20 that supports the cabin 9, a lower frame 21 connected to the support frame 20, and an upper frame 22. Between the lower frame 21 and the upper frame 22, a pair of left and right front pillars 23 is provided at the front end thereof, a pair of left and right center pillars 24 is provided at the center thereof, and a pair of left and right rear pillars 25 are provided at the rear end thereof. Is provided. Each of the front pillar 23, the center pillar 24, and the rear pillar 25 has an upper end connected to the upper frame 22 and a lower end connected to the lower frame 21.

  A floor panel 26 that forms the floor of the cabin 9 is provided on the lower surface side of the cabin frame 15. The floor panel 26 is formed on both the left and right sides of the floor panel 26 so as to cover the outer periphery of the rear wheel 3 from above. The rear wheel fender 27 is fixed. The floor panel 26 includes a step floor panel 26a at the front part of the cabin 9 and a seat floor panel 26b at the rear part of the cabin 9, and the driver's seat 8 is disposed at the left and right center part of the seat floor panel 26b. Has been.

  The steering handle 7 is supported by the front part of the cabin 9, as shown in FIG. The windshield 16 is mounted over the left and right front pillars 23, and the front glass 16 covers the front surface of the cabin frame 15. The rear glass 19 is mounted across the left and right rear pillars 25, and the rear surface of the cabin frame 15 is covered with the rear glass 19. A door 17 is mounted on a doorway on both sides of the cabin frame 15 formed between the front pillar 23 and the center pillar 24 so as to be swingable around the axis of the rear end portion, and the side glass 18 is centered. The pillar 24 and the rear pillar 25 are mounted so as to be swingable.

  As shown in FIGS. 1 and 2, the fuel tank 28 that stores fuel to be supplied to the engine 5 is disposed below the step floor panel 26 a in the floor panel 26 that forms the floor of the cabin 9. As shown in FIG. 3, the fuel tank 28 is provided with a left and right pair of a first fuel tank 28 a disposed on the right side of the cabin 9 and a second fuel tank 28 b disposed on the left side. Each of the first fuel tank 28a and the second fuel tank 28b travels via a front side support bracket 31 provided at a front side portion thereof and a rear side support bracket 32 provided at a rear side portion thereof. It is supported by the vehicle body 4.

  The first fuel tank 28a is provided with a fuel replenishment portion 29, and a communication portion 30 that connects the first fuel tank 28a and the second fuel tank 28b. Thereby, the fuel replenished from the fuel replenishment part 29 is supplied to the 1st fuel tank 28a, and is also supplied to the 2nd fuel tank 28b through the communication part 30 from the 1st fuel tank 28a. Although not shown in the drawing, the communication portion 30 allows fuel to flow from the first fuel tank 28a to the second fuel tank 28b, and allows fuel to flow from the second fuel tank 28b to the first fuel tank 28a. A check valve is provided to block the flow. In addition, the communication part 30 is covered with a cover body 33 having a concave cross section covering the front side, the rear side, and the bottom side thereof.

  The first fuel tank 28a and the second fuel tank 28b are made of resin molded by blow molding. The first fuel tank 28a and the second fuel tank 28b are provided with step portions so that the heights of the upper end portions thereof are different, and are formed in a shape that is long in the front-rear direction in plan view. Further, as shown in FIGS. 2 and 3, the first fuel tank 28 a and the second fuel tank 28 b are configured such that the outer portion of the rear end side portion conforms to the shape of the front end portion of the rear wheel fender 27 in plan view. The rear end portion of the rear wheel fender 27 extends rearward from the front end portion of the rear wheel fender 27. In this way, the first fuel tank 28a and the second fuel tank 28b are configured to ensure a larger capacity while effectively utilizing the space below the step floor panel 26a.

  In the present embodiment, the fuel tank suction structure 100 is provided in the second fuel tank 28 b, and the fuel sucked by the suction structure 100 is supplied to the engine 5 through the fuel supply path 34. Further, a fuel return path 35 for returning fuel from the engine 5 to the fuel tank 28 is connected to the first fuel tank 28a.

Hereinafter, the suction structure 100 will be described.
As shown in FIG. 4, the suction structure 100 includes a suction portion 101 that sucks and takes out the fuel N in the second fuel tank 28b above the bottom portion of the second fuel tank 28b, and a bottom portion of the second fuel tank 28b. A recess storage portion 102 which is disposed in the lower portion and can be stored in the lower portion of the storage chamber 102 so that the fuel N can be stored, and a cover body 103 which covers the recess storage portion 102 while allowing the fuel N to flow into the recess storage portion 102. It has. And the suction part 101 is comprised so that the fuel N currently stored in the hollow storage part 102 may be drawn in and taken out.

  4 is a cross-sectional view of the second fuel tank 28b as viewed from the rear side in FIG. 3. As shown in FIG. 4, the second fuel tank 28b has an upper portion 28A on the outer side on the outer side. The bottom part is formed in a step shape having a step part 28D between the outer bottom part 28B and the inner bottom part 28C.

  The hollow storage part 102 is provided in the inner bottom part 28C located on the lowermost side in the bottom part of the second fuel tank 28b. And the hollow storage part 102 is arrange | positioned in the position close | similar to the level | step-difference part 28D in the inner bottom part 28C, and it arrange | positions in the position where the fuel N flows easily into the hollow storage part 102 by the curved level | step-difference part 28D. Yes. As shown in FIG. 5, the hollow storage portion 102 is formed in a circular shape in a plan view, and the inner wall portion 102 a is formed in an inclined shape such that the lower portion is located more inward than the upper portion. Has been.

  As shown in FIGS. 4 and 5, the cover body 103 is configured by a circular cylindrical body 103 a having a hollow space communicating with the hollow storage portion 102, and the lower end portion of the cylindrical body 103 a is viewed in plan view. Is formed smaller than the hollow storage portion 102 and is inserted into the hollow storage portion 102. Since the hollow storage part 102 and the cover body 103 are both formed in a circular shape, the outer diameter of the cover body 103 is smaller than the inner diameter of the hollow storage part 102. In a plan view, a cover body 103 is arranged at the central portion of the hollow storage portion 102, and the cover body 103 is configured to cover the central portion of the hollow storage portion 102.

  By disposing the cover body 103 in this way, a gap K1 can be formed between the outer wall portion of the cover body 103 and the inner wall portion 102a of the hollow storage portion 102 over the entire length of the outer periphery of the cover body 103. . Accordingly, the cover 103 covers the central portion of the depression storage portion 102 in plan view while allowing the fuel N to flow into the depression storage portion 102 from the gap K1, so that the outer side from the depression storage portion 102 is covered. The fuel N is prevented from flowing out into the tank.

  The cover 103 is configured to include a circular cylindrical body 103 a having a hollow space inside, and the lower end of the cylindrical body 103 a is disposed so as to extend to the inside of the hollow storage portion 102. ing. Thus, even if the traveling vehicle body 4 is swayed in the front-rear direction and the left-right direction, the presence of the cylindrical body 103a prevents the liquid level of the fuel N stored in the recess storage part 102 from swaying. Can do. In addition, as shown in FIG. 4, the fuel N can be stored in the hollow space inside the cylindrical body 103 a, and a larger amount of fuel can be secured by the suction portion 101. In this way, it is possible to prevent the fuel N stored in the hollow storage portion 102 from flowing out to the outside side while securing a large capacity of the fuel N sucked by the suction portion 101, and It can prevent appropriately that the fuel N does not exist in a lower end part and inhales air in the suction part 101. FIG.

  The suction part 101 is configured by a tubular body supported by the cover body 103, and is arranged to extend in the vertical direction through the hollow internal space of the cover body 103. And the lower end part of the suction part 101 becomes substantially the same height as the lower end part of the cover 103, and is inserted in the hollow storage part 102. Further, the suction part 101 is arranged at a position deviated to the outer peripheral side from the center part in a plan view in the circular cylindrical body 103a in the cover body 103.

  Here, for example, the lower end portions of the suction portion 101 and the cover body 103 are positioned in the middle portion in the vertical direction of the hollow storage portion 102. The interval K1 between the outer wall portion of the cover body 103 and the inner wall portion 102a of the recess storage portion 102 is an interval K2 between the suction portion 101 and the respective lower end portions of the cover body 103 and the bottom portion of the recess storage portion 102. It is comprised so that it may become smaller. Thereby, as the hollow storage part 102, more fuel N can be stored, but it can prevent appropriately that the stored fuel N flows out to the outer side.

  As described above, the cover body 103 is configured by the circular cylindrical body 103a, and includes a cover body 103b that closes an upper portion of the cylindrical body 103a. The cover body 103b is configured in a disk shape having a larger diameter than the cylindrical body 103a, and a portion protruding outward from the cylindrical body 103a is an attachment portion for the second fuel tank 28b. . A circular opening through which the tubular body 103a can be inserted and removed is formed on the upper surface of the second fuel tank 28b, and the attachment portion of the cover body 103b is inserted with the tubular body 103a inserted into the opening. The cover 103 is configured to be attached to the second fuel tank 28b by inserting and fastening bolts into the holes. The suction portion 101 is supported by the cover body 103 so as to penetrate the cover body 103b, and the cover body 103 supporting the suction portion 101 is configured to be detachable from the second fuel tank 28b.

  A plurality of communication holes 104 are provided in the upper portion of the cylindrical body 103a to communicate the hollow space inside and the outside. The plurality of communication holes 104 are arranged in a distributed manner in the circumferential direction and the vertical direction of the cylindrical body 103a. Thereby, even if the fuel N stored in the hollow storage portion 102 contains air, the air rises through the hollow space of the cylindrical body 103a and is discharged to the outside of the cylindrical body 103a through the communication hole 104. It is configured to be. Further, the cover body 103b is provided with an external communication portion 105 that passes through the cover body 103b and communicates the hollow space inside the cylindrical body 103a with the outside of the second fuel tank 28b. The external communication portion 105 is configured to discharge the air that has risen through the hollow space to the outside of the second fuel tank 28b. In this way, the upper portion of the cylindrical body 103a is provided with the communication hole 104 and the external communication section 105 as an air discharge section that can discharge the air in the hollow space to the outside of the cylindrical body 103a. Yes. Therefore, even if the fuel N stored in the hollow storage portion 102 contains air, the air can be appropriately removed, and the suction portion 101 can more reliably prevent air from being sucked in. Can do.

  Although not shown, the tractor 1 configured in this way is connected to the front loader in front of the traveling vehicle body 4, for example, excavating earth and sand, or conveying the earth and sand to a desired location such as a truck. Work to transfer can be performed. In addition to a rotary tiller that can be linked to the power take-off shaft 14, various working devices can be attached to the rear portion of the traveling vehicle body 4 depending on the work contents. And although illustration is omitted, since a plurality of auxiliary control valves (for example, three) are provided in the rear part of the traveling vehicle body 4 in the vicinity of the hydraulic device of the link mechanism 13, various working devices are provided. When mounted, the hydraulic control device of the working device is connected to an auxiliary control valve so that the working device can be hydraulically controlled.

  As described above, the tractor 1 is configured to perform various operations by connecting a front loader in front of the traveling vehicle body 4 or by connecting various working devices to the rear part of the traveling vehicle body 4. . In the cabin 9, various operation levers such as an operation lever for manually operating the front loader and an operation lever for manually operating the work device in addition to an operation lever for traveling the traveling vehicle body 4. Is provided.

Various operation levers arranged in the cabin 9 will be described.
As shown in FIGS. 2 and 6, the various operation levers are concentrated on the rear wheel fender 27 on the right side of the driver seat 8. FIG. 6 is a perspective view showing the right side of the driver's seat 8 in the cabin 9. The operation lever includes a hand accelerator lever 36 for manually operating an accelerator, a loader lever 37 for a front loader, a draft lever 38 for setting a workload in draft control for maintaining a constant workload, and a link. A position lever 39 that controls the position by raising and lowering the mechanism 13 and auxiliary control levers 40, 41, and 42 for operating the auxiliary control valve are provided. As described above, since the auxiliary control lever includes three auxiliary control valves behind the traveling vehicle body 4, three of the first auxiliary control lever 40, the second auxiliary control lever 41, and the third auxiliary control lever 42 are provided. There are two control levers.

  In addition to various operation levers 36 to 42, a power take-out switch 43 for switching the power take-out shaft 14 between a drive state and a non-drive state is also provided on the right side of the driver seat 8.

  Hereinafter, arrangement positions and configurations of the various operation levers 36 to 42 will be described. The left-right direction (X direction in FIGS. 2 and 6) of the traveling vehicle body 4 is referred to as “left-right direction”, and the front-rear direction of the traveling vehicle body 4 (Y direction in FIGS. 2 and 6) is referred to as “front-rear direction”.

  The hand accelerator lever 36 is disposed at a position closest to the driver's seat 8 in the left-right direction (X direction) among various operation levers. A first installation surface 44 for installing the hand accelerator lever 36 is formed on the rear wheel fender 27. The first installation surface 44 is formed in an inclined shape that extends in the front-rear direction (Y direction) and becomes lower on the front side. The hand accelerator lever 36 is provided so as to be swingable back and forth along a first guide 45 formed in the first installation surface 44 and extending in the front-rear direction (Y direction).

  The loader lever 37 is disposed on the side farther from the driver seat 8 than the hand accelerator lever 36 in the left-right direction (X direction) and on the front side of the hand accelerator lever 36. The loader lever 37 is configured in a cross swing manner that can swing in the front-rear direction (Y direction) and the left-right direction (X direction). In addition, the loader lever 37 has a rear region in the swing range in the front-rear direction (Y direction) and a front region in the swing range in the front-rear direction (Y direction) of the hand accelerator lever 36 and the left-right direction (X direction). ) Are arranged side by side.

  The draft lever 38 and the position lever 39 are arranged on the side farther from the driver seat 8 than the hand accelerator lever 36 in the left-right direction (X direction) with the two levers aligned in the left-right direction (X direction), and the loader It is arranged behind the lever 37. A second installation surface 46 for installing the draft lever 38 and the position lever 39 is formed on the rear wheel fender 27, and the second installation surface 46 is one step higher than the first installation surface 44. It is configured as follows. The second installation surface 46 is formed with a second guide 47 and a third guide 48 that incline toward the side away from the driver's seat 8 in the left-right direction (X direction). The position lever 39 is provided so as to be swingable along the second guide 47 and the third guide 48.

  The power take-off switch 43 is disposed on the rear side of the hand accelerator lever 36. A third installation surface 49 for installing the power take-off switch 43 is formed. The third installation surface 49 is formed in a curved shape that is lower than the first installation surface 44 and extends in the front-rear direction, and the power take-off switch 43 is provided on the third installation surface 49 and is configured to be freely pressed. ing.

  The auxiliary control levers 40 to 42 are farther from the driver's seat 8 than the draft lever 38, the position lever 39, and the power take-off switch 43 in the left-right direction (X direction), and rearward from the draft lever 38 and the position lever 39. Is arranged. A fourth installation surface 50 for installing the first auxiliary control lever 40 and the second auxiliary control lever 41 is formed, and a fifth installation surface 51 for installing the third auxiliary control lever 42 is formed. . The fourth installation surface 50 is provided with a step portion between the second installation surface 46 and the rear end portion thereof, and is formed in an inclined shape such that the front side is lower at a position higher than the second installation surface 46. . The fourth installation surface 50 is formed with a fourth guide 52 and a fifth guide 53 extending in the front-rear direction (Y direction) arranged in the left-right direction (X direction), and the first auxiliary control lever 40 and The second auxiliary control lever 41 is provided so as to be swingable along the fourth guide 52 and the fifth guide 53. The fifth installation surface 51 is continuous from the fourth installation surface 50 to the rear side, and is formed in an inclined shape such that the rear side is the lower side. A sixth guide 54 extending in the front-rear direction (Y direction) is formed on the fifth installation surface 51, and the third auxiliary control lever 42 is provided so as to be swingable along the sixth guide 54. .

  Regarding the arrangement relationship of the three operation levers of the first to third auxiliary control levers 40 to 42, the first auxiliary control lever 40 and the second auxiliary control lever 41 are arranged in the left-right direction (X direction). The auxiliary control lever 42 is closer to the driver seat 8 than the first auxiliary control lever 40 and the second auxiliary control lever 41 in the left-right direction (X direction), and the first auxiliary control lever 40 and the second auxiliary control lever. It is arranged behind 41. That is, the arrangement positions of the three operation levers of the first to third auxiliary control levers 40 to 42 are arranged in an L shape in a plan view.

  By arranging the first to third auxiliary control levers 40 to 42 in this way, when the driver operates the first auxiliary control lever 40 or the second auxiliary control lever 41, the third auxiliary control lever 42 On the other hand, when the driver operates the third auxiliary control lever 42, the first auxiliary control lever 40 and the second auxiliary control lever 41 do not easily get in the way. Further, for example, it is not necessary to secure an installation space for arranging the three operation levers in the left-right direction (X direction), which is advantageous in terms of installation space. In addition, since the distance between the first auxiliary control lever 40 and the second auxiliary control lever 41 in the left-right direction (X direction) can also be made relatively large, when the driver operates the first auxiliary control lever 40, The auxiliary control lever 41 is less likely to get in the way. Conversely, when the driver operates the second auxiliary control lever 41, the first auxiliary control lever 40 is less likely to get in the way. Therefore, the operability of the auxiliary control levers 40 to 42 can be improved.

  As shown in FIG. 7, the first and second auxiliary control levers 40, 41 are pivotally supported at their proximal ends, and a proximal end side portion 56 extending from the pivotal support portion 55 and a proximal end side portion 56 thereof. And a distal end side portion 57 bent upward. Accordingly, the first and second auxiliary control levers 40 and 41 are configured to have a large swing range in the vertical direction in addition to the front-rear direction. Then, on the rear side of the first and second auxiliary control levers 40 and 41, there is a fifth installation surface 51 formed in an inclined shape that becomes a lower side toward the rear side. Therefore, the driver can easily swing the first and second auxiliary control levers 40 and 41 up and down with the wrist or the like placed on the fifth installation surface 51. Therefore, the operability of the first and second auxiliary control levers 40 and 41 can be further improved.

[Another embodiment]
(1) In the above embodiment, the cover body 103 is constituted by the cylindrical body 103a. However, as shown in FIGS. 8 and 9, for example, the cover body 103 can be constituted by a plate-like body. . In this case, as shown in FIGS. 8 and 9, the cover 103 can be disposed at a desired position by supporting the cover 103 with the suction portion 101.

In FIG. 8, the plate-like body that is the cover body 103 is formed in a circular shape having a smaller diameter than the circular recess storage section 102, and the cover body 103 covers the central portion of the recess storage section 102 in plan view. Are arranged as follows. In FIG. 8, the cover 103 is inserted into the hollow storage portion 102.
In FIG. 9, the plate-like body that is the cover body 103 is formed in a circular shape having a larger diameter than the circular recess storage section 102, and the cover body 103 covers the entire recess storage section 102 in plan view. Are arranged as follows. In FIG. 9, the cover 103 is disposed above the bottom of the fuel tank with a space therebetween.

(2) In the above embodiment, the fuel tank 28 is composed of the first fuel tank 28a and the second fuel tank 28b. However, for example, the fuel tank 28 may be composed of one fuel tank, and the number thereof is appropriately determined. It can be changed. Further, the arrangement position of the fuel tank 28 is not limited to the position below the step floor panel 26a. For example, it can be arranged inside the bonnet 6, and the arrangement position can be changed as appropriate.

(3) In the above embodiment, the arrangement position of the cover 103 can be changed as appropriate. As described in the above (1), as shown in FIG. 9, the entire depression storage part 102 may be covered in a plan view, and even when a part of the depression storage part 102 is covered in a plan view, It is not limited to covering the part. Further, the lower end portion of the cover 103 is not limited to the one inserted into the hollow storage portion 102, and may be arranged to be substantially flush with the bottom portion of the fuel tank, for example.

(4) In the above-described embodiment, the example in which the fuel tank suction structure according to the present invention is applied to the tractor 1 has been described. However, the present invention can be applied to various other work vehicles.

  The present invention is provided with a suction part that sucks and takes out the fuel in the fuel tank above the bottom of the fuel tank, and even if the fuel in the fuel tank is low, the fuel can be appropriately discharged without sucking air in the suction part. It is possible to adapt the fuel tank suction structure to various types that can perform the suction.

28 Fuel tank 101 Suction part 102 Recess storage part 102a Inner wall part 103 Cover body 103a Tubular body 104 Air discharge part (communication hole)
105 Air discharge part (external communication part)
N fuel

Claims (5)

A fuel tank suction structure comprising a suction part that sucks and takes out fuel in the fuel tank above the bottom of the fuel tank,
A depression storage section that is recessed below the bottom of the fuel tank and is capable of storing fuel; and a cover that covers the depression storage section in a state that allows fuel to flow into the depression storage section, The fuel tank suction structure, wherein the suction part is configured to suck and take out fuel stored in the hollow storage part.   2. The fuel tank suction structure according to claim 1, wherein the cover is configured to cover a central portion of the hollow storage portion in a plan view.   3. The fuel tank suction structure according to claim 1, wherein the suction portion is supported by the cover, and the cover that supports the suction portion is configured to be detachable from the fuel tank. 4.   The cover body is configured by a cylindrical body having a hollow space communicating with the recess storage section, and a lower end portion of the cylindrical body is formed smaller than the recess storage section in plan view, and the recess The fuel tank suction structure according to any one of claims 1 to 3, wherein the fuel tank suction structure is inserted into the reservoir.   5. The fuel tank suction structure according to claim 4, wherein an air discharge portion is provided at an upper portion of the cylindrical body so that air in the hollow space can be discharged to the outside of the cylindrical body.

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