Work machine
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Filing Date
- 2026-01-09
- Publication Date
- 2026-06-05
Abstract
Description
Work equipment
[0001] The present invention relates to a work machine such as a backhoe. This application claims priority to Japanese Application No. 2023-142886, filed September 4, 2023, and incorporates by reference all of the contents of said Japanese application.
[0002] A known working machine is disclosed in Patent Document 1. The working machine disclosed in Patent Document 1 is a backhoe, and includes a rotating base, a prime mover mounted on the rotating base, a fuel tank for storing fuel to be supplied to the prime mover, and a fuel pump and a fuel pipe used to refuel the fuel tank. The fuel pipe includes a fuel hose connected at one end to the suction side of the fuel pump and a nozzle (suction part) provided at the other end of the fuel hose. The fuel pipe is housed inside (a side chamber) of the machine body, which is covered with a cover. The working machine includes a holder for holding the other end (nozzle) of the fuel pipe (fuel hose and nozzle) when the fuel pipe (fuel hose and nozzle) is housed inside the machine body.
[0003] JP 2010-084329 A
[0004] A work machine according to one aspect of the present disclosure is a work machine having a body covered with a cover and equipped with a prime mover, a tank for storing fuel for the prime mover, and a pump for sending fuel to the tank, wherein the body is equipped, inside the cover, with a fuel filler pipe that includes a hose at least in part and has one end connected to the suction port of the pump, and a holder that holds the other end of the fuel filler pipe with the tip of the other end facing upward, the holder having an opening on the lower side and a cap portion that is closed on the upper side, and the fuel filler pipe is held in the holder with the other end inserted into the cap portion through the opening.
[0005] The present disclosure makes it possible to prevent water and the like from flowing from the fuel filler pipe into the fuel tank in a work machine that has a fuel tank and a fuel filler pipe inside the machine body for refilling fuel into the fuel tank.
[0006] FIG. 1 is a perspective view showing an outline of a work machine according to an embodiment of the present disclosure. FIG. 2 is a right side view showing an outline of a work machine according to an embodiment of the present disclosure. FIG. 3 is a perspective view showing a machine body. FIG. 4 is a perspective view showing the interior of the machine body (the periphery of the fuel tank). FIG. 5 is a perspective view showing the periphery of the fuel tank and the fuel pump. FIG. 6 is a perspective view showing a fuel tank, a fuel filler pipe, a fuel pump, and a holder. FIG. 7 is a front view showing a fuel tank, a fuel filler pipe, a fuel pump, and a holder. FIG. 8 is a perspective view showing the holder. FIG. 9 is a partial side view showing a state in which the fuel filler pipe is inserted into the holder. FIG. 10 is a perspective view showing a state in which the fuel filler pipe is held by the holder and a state in which the locking mechanism is activated.
[0007] In conventional work machines, the holder holds the other end of the fuel filler pipe (nozzle) with the tip pointing downward. Rainwater, dust, and other particles (hereinafter referred to as "water") that have entered the machine body can accumulate inside the holder, and this accumulated water can flow through the fuel filler pipe (fuel filler hose and nozzle) into the fuel tank.
[0008] The present disclosure aims to prevent water and the like from flowing from the fuel filler pipe into the fuel tank in a work machine that has a fuel tank and a fuel filler pipe inside the machine body for refilling fuel into the fuel tank.
[0009] <Effects of the Invention> According to the work machine disclosed herein, in a work machine that has a fuel tank and a fuel filler pipe inside the body for refilling fuel into the fuel tank, it is possible to prevent water and the like from flowing from the fuel filler pipe into the fuel tank.
[0010] <Outline of Embodiments of the Present Disclosure> The following is a list and description of outlines of embodiments of the present disclosure. (1) A work machine of the present disclosure is a work machine having a body mounted with a prime mover, a tank for storing fuel for the prime mover, and a pump for sending fuel to the tank and covered with a cover, the body including, inside the cover, a fuel filler pipe at least partially including a hose and having one end connected to a suction port of the pump, and a holder for holding the other end of the fuel filler pipe with the tip of the other end facing upward, the holder having an opening on a lower side and a cap portion with an upper side closed, the fuel filler pipe being held by the holder with the other end inserted into the cap portion through the opening.
[0011] In the work machine having the above configuration, the cap portion into which the other end of the fuel filler pipe is inserted is positioned with one axial side facing downward. Therefore, the cap portion does not allow water or the like that has entered the machine body to accumulate inside. Therefore, with the work machine having the above configuration, in a configuration in which a fuel tank and a fuel filler pipe for refilling fuel into the fuel tank are provided inside the machine body, it is possible to prevent water or the like from flowing from the fuel filler pipe into the fuel tank.
[0012] (2) In the work machine according to the above aspect (1), it is preferable that the fuel filler pipe includes a nozzle constituting the other end, and the holder holds the nozzle. In the work machine configured as described above, when the fuel filler pipe has a nozzle, the inflow of water or the like from the fuel filler pipe to the fuel tank can be suppressed.
[0013] (3) In the work machine according to the aspect (2), it is preferable that the holder holds the nozzle in a state in which the fuel suction hole of the nozzle is positioned above the liquid level of the fuel in the tank when the tank is filled to its maximum capacity. With a work machine configured in this way, it is possible to prevent the fuel in the fuel tank from leaking out through the fuel filler pipe.
[0014] (4) In the work machine according to the above (2) or (3), it is preferable that the holder further includes a locking portion that locks the nozzle, and the locking portion is configured to be displaceable between a first position that locks the nozzle when inserted into the cap portion and a second position that unlocks the nozzle when inserted into the cap portion. A work machine configured in this manner makes it easy to insert the fuel filler pipe into the cap portion and can reliably hold the inserted fuel filler pipe by the locking portion.
[0015] (5) In the work machine according to the embodiment (4), it is preferable that the holder further includes a locking mechanism that restricts displacement of the engaging portion from the first position to the second position. With this work machine, the fuel filler pipe inserted into the cap portion can be securely held by the engaging portion.
[0016] (6) In the work machine according to any one of the above (1) to (5), it is preferable that the holder is detachably attached to the machine body or to a member detachably attached to the machine body. A work machine having such a configuration can easily realize a configuration in which the holder is detachable.
[0017] (7) In the work machine according to any one of (1) to (6), it is preferable that the machine body further includes a fuel filler pipe holder that is located inside the cover and that holds a middle portion of the fuel filler pipe in the longitudinal direction below the holder. A work machine configured in this manner can prevent fuel from leaking out of the fuel tank through the fuel filler pipe.
[0018] (8) In the work machine according to any one of (1) to (7), it is preferable that the fuel filler pipe holder holds the fuel filler pipe wound in a spiral shape. With a work machine configured in this way, the fuel filler pipe can be stored inside the machine body by utilizing the space between the fuel tank and the cover.
[0019] (9) In the work machine according to any one of (1) to (8), it is preferable that the cap portion has an opening on the lower side and is cylindrical with closed sides and upper sides. With a work machine configured in this way, it is possible to prevent water and the like from flowing into the fuel tank from the nozzle through the fuel filler pipe.
[0020] <Details of the embodiments of the present disclosure> Hereinafter, the details of the embodiments of the present disclosure will be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any manner.
[0021] [Overall Configuration of Work Machine] Fig. 1 is a perspective view showing an outline of a work machine 10 according to an embodiment of the present disclosure. Fig. 2 is a right side view showing an outline of the work machine 10 according to an embodiment of the present disclosure. Figs. 1 and 2 show the work machine 10, which is an embodiment of the work machine of the present disclosure. The work machine 10 illustrated in this embodiment is a backhoe. As shown in Fig. 1, the work machine 10 includes a body 11, a traveling device 12, a work device 13, a cabin 14, and a driver's seat 15 located within the cabin 14. Note that the work machine 10 may be configured to include a canopy instead of the cabin 14.
[0022] In the following description, the direction toward the front of the operator seated in the driver's seat 15 will be referred to as the front of the work machine 10, and the direction toward the rear will be referred to as the rear, with the fore-and-aft direction of the work machine 10 indicated by arrow X. In addition, in the following description, the direction toward the left of the operator seated in the driver's seat 15 will be referred to as the left of the work machine 10, and the direction toward the right will be referred to as the right of the work machine 10, with the left-and-right direction of the work machine 10 indicated by arrow Y. The left-and-right direction of the work machine 10 will also be referred to as the width direction. In addition, in the following description, the up-and-down direction of the work machine 10 will be indicated by arrow Z. The up-and-down direction of the work machine 10 is perpendicular to the fore-and-aft direction and the left-and-right direction.
[0023] As shown in FIGS. 1 and 2 , the travelling device 12 is a crawler-type travelling device that supports the machine body 11 so that it can travel. The travelling device 12 includes a first travelling device 12L provided on the left side of the machine body 11 and a second travelling device 12R provided on the right side. The first travelling device 12L and the second travelling device 12R are driven by a hydraulic motor 12M. While a crawler-type travelling device 12 is used in this embodiment, the configuration of the travelling device in the work machine disclosed herein is not limited to this, and a wheel-type travelling device or other type of travelling device may also be used. The work machine 10 further includes a dozer device 16. The dozer device 16 is provided in front of the travelling device 12. The dozer device 16 may be provided at the front or rear of the work machine 10, or may be omitted.
[0024] 2 , the machine body 11 is mounted on the traveling device 12 via a swivel bearing 17. The swivel bearing 17 supports the machine body 11 relative to the traveling device 12. The machine body 11 is configured to be rotatable around a swivel axis C of the swivel bearing 17.
[0025] As shown in Figures 1 and 2, the work machine 10 is provided with a support bracket 20 and a swing bracket 21 at the front of the machine body 11, which support the work device 13. The support bracket 20 is part of the revolving frame 30 and is provided to protrude forward of the machine body 11. The support bracket 20 is provided with a through hole extending in the vertical direction and a vertical shaft member inserted into the through hole. The swing bracket 21 is supported by the vertical shaft member of the support bracket 20 and is configured to be swingable around the vertical shaft member. The swing bracket 21 swings in accordance with the extension and contraction of the swing cylinder 25. The swing bracket 21 is provided with a first horizontal shaft member extending in a direction perpendicular to the vertical direction.
[0026] The working device 13 includes a boom 22, an arm 23, and a bucket 24. The base of the boom 22 is supported by the first horizontal shaft member of the swing bracket 21 and is rotatable about the first horizontal shaft member. The boom 22 swings in response to the extension and contraction of a boom cylinder 26. The boom 22 includes a second horizontal shaft member at its tip end that extends in a direction perpendicular to the up-down direction. The arm 23 is supported by the second horizontal shaft member of the boom 22 and is rotatable about the second horizontal shaft member. The arm 23 swings in response to the extension and contraction of an arm cylinder 27. The arm 23 includes a third horizontal shaft member at its tip end that extends in a direction perpendicular to the up-down direction. The bucket 24 is supported by the third horizontal shaft member of the arm 23 and is rotatable about the third horizontal shaft member. The bucket 24 swings in response to the extension and contraction of a bucket cylinder 28. The swing cylinder 25, the boom cylinder 26, the arm cylinder 27, and the bucket cylinder 28 are configured by hydraulic cylinders (hydraulic actuators). Note that the work implement 10 may be configured to be able to attach another work implement (hydraulic attachment) instead of the bucket 24.
[0027] [Regarding the Airframe] Figure 3 is a perspective view showing the airframe 11. As shown in Figures 1 to 3, the airframe 11 includes an engine (prime mover) E, a fuel tank T, a revolving frame 30, and a cover 40. The revolving frame 30 and the cover 40 form the outer shell of the airframe 11. The airframe 11 is equipped with the engine E, the fuel tank T, and various other devices inside the outer shell formed by the revolving frame 30 and the cover 40.
[0028] The engine E is a drive source that drives each part of the work machine 10. In this embodiment, the engine E is a diesel engine. However, the engine E may also be a gasoline engine. Furthermore, in this embodiment, an engine (internal combustion engine) is exemplified as the prime mover, but the engine E may also be a hybrid type having an engine and an electric motor.
[0029] The fuel tank T stores fuel (diesel) for the engine E. The fuel tank T is disposed in front of the engine E.
[0030] Although detailed description is omitted in this description, the machine body 11 further includes various devices, not shown, such as a cooling fan, radiator, oil cooler, fuel cooler, swing motor, battery, hydraulic pump, exhaust gas purification device, air cleaner, hydraulic oil tank, and control valve. The radiator is a cooler that cools the coolant for the engine E. The oil cooler is a cooler that cools the hydraulic oil returning from hydraulic actuators such as hydraulic cylinders and hydraulic motors. The fuel cooler is a cooler that cools the fuel. These coolers are cooled by cooling air generated by a cooling fan. The swing motor is a drive source that drives the machine body 11 around the swing axis C. The battery supplies power to electrical components mounted on the work machine 10. The hydraulic pump is driven by the power of the engine E and discharges hydraulic oil that drives the hydraulic motor, hydraulic cylinders, etc., as well as pilot pressure that operates hydraulic valves and hydraulic pressure for signals. The exhaust gas purification device is a device (DPF) that purifies exhaust gas emitted from the engine E. The air cleaner is a device that purifies the air supplied to the engine E. The hydraulic oil tank is a tank that stores hydraulic oil, and the hydraulic oil is sent from the hydraulic oil tank to the hydraulic pump. The control valve controls the flow rate of hydraulic oil that is supplied from the hydraulic pump to the hydraulic actuator.
[0031] 1 to 3, the cover 40, together with the revolving frame 30, constitutes the outer shell of the machine body 11. The cover 40 covers the front, rear, left, right, and top surfaces of the machine body 11. The cover 40 is configured to include a plurality of covers. The cover 40 of this embodiment includes a total of nine types of covers (first cover 40A to ninth cover 40I).
[0032] The first cover 40A is disposed at the front right side of the aircraft 11. The second cover 40B extends rearward and upward from the top of the first cover 40A and covers the top of the fuel tank T. The second cover 40B is configured to be openable and closable and is used for refueling the fuel tank T and for inspecting and maintaining the fuel tank T. The third cover 40C covers the right side of the fuel tank T. The third cover 40C is configured to be openable and closable and is used for inspecting and maintaining the fuel tank T. The fourth cover 40D is disposed at the rear right side of the aircraft 11. The fourth cover 40D has an outside air intake 41 formed therein for drawing outside air into the fourth cover 40D. Air (cooling air) drawn in by the cooling fan is introduced through the outside air intake 41. The fifth cover 40E covers the right side of the engine E and above the cooling fan. The sixth cover 40F and the seventh cover 40G cover the rear of the engine E. The sixth cover 40F is disposed in an opening 43 formed in the seventh cover 40G. The seventh cover 40G is supported on the sixth cover 40F via a hinge (not shown). The seventh cover 40G opens and closes the opening 43. The eighth cover 40H is disposed at the rear left side of the fuselage 11. The ninth cover 40I is disposed below the eighth cover 40H.
[0033] [Regarding the Fuel Tank and Fuel Supply Pump] FIG. 4 is a perspective view showing the interior of the machine body 11 (the periphery of the fuel tank T). FIG. 5 is a perspective view showing the periphery of the fuel tank T and the fuel supply pump 45. FIG. 6 is a perspective view showing the fuel tank T, the fuel supply pipe 50, the fuel supply pump 45, and the holder 60. Note that FIG. 4 is a view of the interior of the machine body 11 viewed from diagonally above with the second cover 40B removed from the machine body 11, and FIG. 5 is a view of the interior of the machine body 11 viewed from diagonally above with the first cover 40A, the second cover 40B, and the third cover 40C removed from the machine body 11 and with the devices in front of the fuel tank T removed. As shown in FIGS. 4 to 6, the work machine 10 of the present disclosure includes a fuel tank T and a fuel supply pump 45 inside the machine body 11. The fuel tank T is a tank that stores fuel (diesel) for the engine E, and includes a tank body Ta, an oil filler opening Tb, a lid Tc, and a fuel injection port Td, as shown in Fig. 6. The fuel supply pump 45 is a pump that pumps fuel to be replenished to the fuel tank T.
[0034] [Regarding the Fuel Supply Pipe] Figure 7 is a front view showing the fuel tank T, the fuel supply pipe 50, the fuel supply pump 45, and the holder 60. As shown in Figures 4 to 7, the work machine 10 of the present disclosure further includes a fuel supply pipe 50 inside the machine body 11. As shown in Figures 6 and 7, the fuel supply pipe 50 includes a suction pipe 51 and a discharge pipe 52. The fuel supply pipe 50 forms a supply path for fuel that is pressure-fed to the fuel tank T by the fuel supply pump 45. One end 51a of the suction pipe 51 is connected to the suction port of the fuel supply pump 45. The suction pipe 51 includes a hose 53 and a nozzle 54. The hose 53 forms the intermediate portion and one end 51a of the fuel supply pipe 50 in the longitudinal direction. The other end 51b of the suction pipe 51 is formed by the nozzle 54. The other end 51b (nozzle 54) of the suction pipe 51 is inserted into, for example, a drum (not shown) that stores replenishment fuel, and is used as a suction port for sucking in the fuel inside the drum. One end of the discharge pipe 52 is connected to a discharge port of the fuel supply pump 45, and the other end is connected to a fuel injection port Td of the fuel tank T. In this embodiment, the discharge pipe 52 is formed by a hose 53. When the fuel supply pump 45 is operated in the work machine 10, the fuel inside the drum is sucked into the suction pipe 51 from the other end 51b (nozzle 54), pressurized by the fuel supply pump 45, and supplied to the fuel tank T through the discharge pipe 52 and the fuel injection port Td.
[0035] [Regarding the Holder] FIG. 8 is a perspective view showing the holder 60. FIG. 9 is a partial side view showing the insertion of the fuel filler pipe 50 into the holder 60. FIG. 10 is a perspective view showing the holding of the fuel filler pipe 50 by the holder 60 and the operation of the locking mechanism 64. As shown in FIGS. 4 and 5 , the work machine 10 of the present disclosure further includes a holder 60 inside the machine body 11. The holder 60 holds the other end 51 b of the suction pipe 51 of the fuel filler pipe 50. The work machine 10 of this embodiment is provided with a nozzle 54 at the other end 51 b of the suction pipe 51. Therefore, the holder 60 of this embodiment holds the nozzle 54. Note that although the work machine 10 of this embodiment is provided with the nozzle 54 at the other end 51 b of the suction pipe 51, the nozzle 54 may be omitted. In this case, it is preferable that the holder 60 hold the other end 51 b of the suction pipe 51 (the other end of the hose 53).
[0036] 8 , the holder 60 includes a first member 61, a second member 62, and a shaft member 63. The shaft member 63 is fixed to the first member 61. The second member 62 is supported by the shaft member 63 so as to be rotatable relative to the first member 61.
[0037] The first member 61 includes a main body portion 61a and a cap portion 61b. The second member 62 includes an arm portion 62a and a locking portion 62b. The locking portion 62b includes a recess 62c configured to be shaped to lock onto the other end 51b (nozzle 54) of the suction pipe 51. The nozzle 54 has a small-diameter portion 56, which has a smaller outer diameter than the tip end (the portion having the suction hole 55). The surface of the recess 62c facing the small-diameter portion 56 is a curved surface with an inner diameter that is larger than the outer diameter of the small-diameter portion 56 and smaller than the outer diameter of the tip end of the small-diameter portion 56 in the nozzle 54. Therefore, the nozzle 54 is inserted into the cap portion 61b from below with the tip end facing upward, and the second member 62 is rotated around the shaft member 63 to position the recess 62c so that it radially sandwiches the small-diameter portion 56. This allows the nozzle 54 to be locked by the locking portion 62b.
[0038] As shown in FIGS. 8 to 10 , the first member 61 supports a shaft member 63. The first member 61 also rotatably supports the arm portion 62a of the second member 62 via the shaft member 63. The second member 62 rotates around the shaft member 63 between a first position P1 and a second position P2. In this description, among the positions within the rotation range of the arm portion 62a where the locking portion 62b can lock the nozzle 54, the position where the distance between the nozzle 54 and the recess 62c is smallest is referred to as the first position P1. Among the positions where the locking portion 62b cannot lock the nozzle 54, the position where the distance between the nozzle 54 and the recess 62c is largest is referred to as the second position P2. The locking portion 62b is configured to be displaceable between the first position P1 and the second position P2. At the first position P1, the locking portion 62b locks the nozzle 54 inserted into the cap portion 61b. At the second position P2, the locking portion 62b releases the lock on the nozzle 54 that is inserted into the cap portion 61b.
[0039] The first member 61 has a main body portion 61a and a cap portion 61b. The cap portion 61b is fixed to the main body portion 61a. The main body portion 61a serves as a stay that secures the holder 60 to the machine body 11. The cap portion 61b is the portion into which the other end portion 51b (nozzle 54) of the suction pipe 51 is inserted and serves to protect the other end portion 51b (nozzle 54) from rainwater, dust, and the like (water, etc.). The cap portion 61b has a cylindrical portion 61c having a cylindrical shape and a lid portion 61d that seals one axial end (upper end) of the cylindrical portion 61c. The cap portion 61b has an opening 61h at the other axial end (lower end) of the cylindrical portion 61c, which is open. The holder 60 is used in an orientation in which one end of the cylindrical portion 61c of the cap portion 61b faces upward. The other end 51b (nozzle 54) of the suction pipe 51 is inserted into the cap portion 61b through an opening 61h on the other end (lower side) of the cylindrical portion 61c. Even if water or the like seeps into the cap portion 61b with this configuration, the water naturally flows out of the opening 61h, eliminating the risk of water accumulating inside. The cap portion 61b has the lid portion 61d, so that even if water or the like seeps into the aircraft body 11 and splashes onto the cap portion 61b, the water or the like is less likely to penetrate into the cap portion 61b. Therefore, the holder 60 can prevent water or the like from splashing onto the other end 51b (nozzle 54) inserted into the cap portion 61b. Furthermore, the holder 60 holds the suction pipe 51 with the tip of the other end 51b facing upward, thereby preventing fuel from leaking out of the suction pipe 51. In this embodiment, a configuration in which the cap portion 61b is cylindrical is described, but the shape of the cap portion 61b is not limited to this, and may be, for example, a cylindrical shape with a polygonal cross section or a cylindrical shape with an elliptical cross section.
[0040] 8 to 10 , the holder 60 includes a locking mechanism 64. The locking mechanism 64 is a mechanism that restricts the displacement (rotation) of the second member 62, which is located at the first position P1, to the second position P2. The locking mechanism 64 allows the displacement (rotation) of the second member 62, which is located closer to the second position P2 than the first position P1. The locking mechanism 64 includes a guide portion 61 e and a guide hole 61 f provided on the first member 61, a guide groove 62 d provided on the second member 62, a bracket 65 attached to the second member 62, a locking pin 66, and a coil spring 67.
[0041] The bracket 65 supports the lock pin 66 so that it can be displaced in the left-right direction. In other words, the lock pin 66 is supported by the bracket 65 so that it can be displaced in the left-right direction. A flange 68 is provided on the lock pin 66 midway through the portion supported by the bracket 65 (see FIG. 10 ). The flange 68 is formed of a disk-shaped member (e.g., a washer) extending radially of the lock pin 66. The coil spring 67 is provided between the bracket 65 and the flange 68 in a state shortened from its normal length. The coil spring 67 applies a spring force to the lock pin 66 as the coil spring 67 attempts to expand between the bracket 65 and the flange 68. The coil spring 67 constantly applies a spring force to the lock pin 66 that tends to displace it to the right.
[0042] When the second member 62 (locking portion 62b) is positioned (rotated) toward the second position P2 from the first position P1, the tip portion 66a of the lock pin 66 is in contact with the guide portion 61e of the first member 61. At this time, the tip portion 66a is pressed against the guide portion 61e by the spring force. When the second member 62 (locking portion 62b) is rotated in a direction approaching the first position P1, the tip portion 66a of the lock pin 66 maintains a state in which it is in contact with the guide portion 61e. Therefore, when the second member 62 (locking portion 62b) is rotated in a direction approaching the first position P1, the lock pin 66 is displaced leftward along the inclination of the guide portion 61e.
[0043] When the second member 62 (locking portion 62b) of the holder 60 is located at the first position P1, the position of the tip 66a of the lock pin 66 substantially coincides with the position of the guide hole 61f of the first member 61, as viewed from the left-right direction. The tip 66a has an outer diameter that allows it to be inserted into the guide hole 61f.
[0044] When the second member 62 (locking portion 62b) is located at the first position P1, the lock pin 66 is biased by the coil spring 67 to displace to the right, and the tip portion 66a is inserted into the guide hole 61f. With the tip portion 66a inserted into the guide hole 61f, displacement of the second member 62 around the shaft member 63 is restricted. As a result, displacement of the second member 62 (locking portion 62b) to the second position P2 is restricted, and the second member 62 (locking portion 62b) is held at the first position P1.
[0045] When the user displaces the lock pin 66 to the left against the spring force of the coil spring 67 while the second member 62 (locking portion 62b) is located at the first position P1, the tip portion 66a of the lock pin 66 is pulled out of the guide hole 61f. At this time, the restriction on the displacement of the second member 62 (locking portion 62b) around the shaft member 63 is released. In other words, the user can release the lock mechanism 64 by displacing the lock pin 66 to the left while the second member 62 (locking portion 62b) is located at the first position P1.
[0046] 9 and 10 , in the work machine 10 of the present disclosure, when the other end 51b (nozzle 54) of the suction pipe 51 is removed from the holder 60, the second member 62 (locking portion 62b) of the holder 60 is positioned at the second position P2. In the work machine 10 of the present disclosure, in this state, the user inserts the other end 51b (nozzle 54) into the cap portion 61b from below the cap portion 61b through the opening 61h. Next, the user rotates the second member 62 (locking portion 62b) from the second position P2 to the first position P1. When the second member 62 (locking portion 62b) is rotated to the first position P1, the recesses 62c enter a position where they sandwich the small diameter portion 56 from both radial sides, and the lower surface of the portion of the nozzle 54 that is larger in diameter than the small diameter portion 56 and distal to the small diameter portion 56 rests on the recesses 62c. As a result, the other end 51b (nozzle 54) of the suction pipe 51 is locked by the locking portion 62b. When the second member 62 (locking portion 62b) is rotated to the first position P1, the locking mechanism 64 is activated, and displacement around the shaft member 63 is restricted. As a result, the other end 51b (nozzle 54) is held by the locking portion 62b of the holder 60.
[0047] In the work machine 10 of the present disclosure, when removing the other end 51b (nozzle 54) of the suction pipe 51 from the holder 60, the user first displaces the lock pin 66 leftward along the guide groove 62d. At this time, the tip 66a of the lock pin 66 is removed from the guide hole 61f, thereby disengaging the locking mechanism 64. Next, the user rotates the second member 62 from the first position P1 to the second position P2. At this time, the small-diameter portion 56 of the other end 51b (nozzle 54) is removed from the recess 62c, and the locking by the locking portion 62b is released. This allows the other end 51b (nozzle 54) to be removed downward from the holder 60 (cap portion 61b). In this state, the user can remove the other end 51b (nozzle 54) by pulling the other end 51b (nozzle 54) downward from the holder 60 (cap portion 61b). The configuration of the holder 60 is not limited to the above-described configuration, and may be any configuration that includes a cap portion 61b into which the other end 51b of the suction pipe 51 is inserted with the tip facing upward and that can hold the other end 51b of the suction pipe 51 inserted into the cap portion 61b. For example, the holder 60 may be configured so that the other end 51b of the suction pipe 51 is held by frictional force acting between the nozzle 54 and the other end 51b when the other end 51b of the suction pipe 51 is pushed into the cap portion 61b. Alternatively, the holder 60 may have a so-called coupler structure (quick joint structure) in which a part of the nozzle 54 engages with an engaging portion provided on the cap portion 61b when the other end 51b of the suction pipe 51 is pushed into the cap portion 61b.
[0048] 7 , in the work machine 10 of this embodiment, when the other end 51 b (nozzle 54) is held by the holder 60, the position L2 of the lower end of the suction hole 55 is located higher than the position L1 of the upper end of the fuel tank T (specifically, the upper end of the fuel filler port Tb). The position L1 of the upper end of the fuel tank T is the position of the fuel level in the fuel tank T when the fuel tank T is filled to its maximum capacity. Therefore, the work machine 10 of this embodiment can prevent fuel stored in the fuel tank T from flowing through the suction pipe 51 to the other end 51 b (nozzle 54) and leaking out.
[0049] 6 and 7 , the work machine 10 of this embodiment further includes a plurality of fuel filler pipe holders 75 provided on the upper part of the fuel tank T. In the work machine 10 of this embodiment, the fuel filler pipe holders 75 are formed from round steel bars bent into a generally U-shape. The suction pipe 51 (hose 53) of the fuel filler pipe 50 is wound spirally around an axis extending in the vertical direction on the upper part of the fuel tank T and is sequentially fitted into the fuel filler pipe holders 75 along the winding direction, thereby being held on the upper part of the fuel tank T. In the work machine 10 of this embodiment, the suction pipe 51 (hose 53) held by the plurality of fuel filler pipe holders 75 is located below the holder 60. Therefore, the work machine 10 of this embodiment can prevent fuel in the suction pipe 51 from leaking out from the other end 51 b (nozzle 54) to the outside. In addition, by being equipped with multiple fuel filler pipe holding portions 75, the work machine 10 of this embodiment can store the suction pipe 51 inside the body 11 by utilizing the limited space between the cover 40 (second cover 40B, see Figure 3) and the fuel tank T.
[0050] [Regarding the installation position of the holder] As shown in Figures 4 to 7, the work machine 10 of this embodiment is provided with an internal cover 70 inside the machine body 11 to protect the equipment inside the machine body 11. The internal cover 70 is a member that further covers the devices arranged inside the cover 40. The internal cover 70 is configured to be removable from the machine body 11. The internal cover 70 is attached to the machine body 11 using fixing members (for example, bolts), and is configured to be attachable to and detachable from the machine body 11 by attaching and detaching the fixing members. Therefore, the internal cover 70 is configured to be removable when inspecting the devices arranged inside the internal cover 70.
[0051] In the work machine 10 of this embodiment, the first member 61 of the holder 60 is fixed to the inner cover 70. Therefore, the holder 60 is configured to be detachable from the machine body 11 by attaching and detaching the inner cover 70. In the work machine 10 configured in this manner, the holder 60 can be easily removed from the machine body 11. Therefore, if the holder 60 becomes dirty, for example, it can be removed from the machine body 11 and cleaned. The work machine 10 of this embodiment can keep the holder 60 and the other end 51b (nozzle 54) of the suction pipe 51 clean. Note that, in this embodiment, a configuration in which the holder 60 is fixed to the inner cover 70 has been described. However, the present invention is not limited to this. For example, the holder 60 may be fixed to or detachably attached to the frame of the machine body 11.
[0052] The above-described embodiments are illustrative in all respects and are not limiting. The scope of the present invention is defined by the claims rather than the above-described embodiments, and includes all modifications within the scope equivalent to the configurations described in the claims.
[0053] REFERENCE SIGNS LIST 10 Work machine 11 Machine body 40 Cover 45 Fuel supply pump 50 Fuel supply pipe 51 Suction pipe 51a One end 51b Other end 51c End surface of other end 53 Hose 54 Nozzle 55 Suction hole 60 Holder 61b Cap portion 61h Opening 62b Locking portion 64 Locking mechanism 70 Inner cover 75 Fuel supply pipe holding portion E Engine (prime mover) T Fuel tank (tank) P1 First position P2 Second position L1 Position of upper end of fuel tank L2 Position of suction hole
Claims
1. A work machine having a body covered with a cover, equipped with a prime mover, a tank for storing fuel for the prime mover, and a pump for supplying fuel to the tank, The aforementioned aircraft, inside the cover, A fuel supply pipe, which includes at least a hose in part and has one end connected to the suction port of the pump, The system includes a holder that holds the other end of the fuel supply pipe in an upward position, The holder has an opening on the lower side and a cap portion that is closed on the upper side. The fuel supply pipe is held in the holder with the other end inserted into the cap portion through the opening. A work machine in which, with the fuel supply pipe held in the holder, a gap is formed at the opening between the holder and the fuel supply pipe through which water can pass.
2. The oil supply pipe includes a nozzle that constitutes the other end, The holder is a work machine according to claim 1, which holds the nozzle.
3. The aforementioned holder is The work machine according to claim 2, wherein the nozzle is held in a state in which the fuel intake hole of the nozzle is positioned above the liquid level of the fuel in the tank when the tank is filled to its maximum capacity.
4. A work machine having a body covered with a cover, which is equipped with a prime mover, a tank for storing fuel for the prime mover, and a pump for supplying fuel to the tank, The aforementioned aircraft, inside the cover, A fuel supply pipe, which includes at least a hose in part and has one end connected to the suction port of the pump, The system includes a holder that holds the other end of the fuel supply pipe in an upward position, The holder has an opening on the lower side and a cap portion that is closed on the upper side. The fuel supply pipe is held in the holder with the other end inserted into the cap portion through the opening. The oil supply pipe includes a nozzle that constitutes the other end, The aforementioned holder is The nozzle is further provided with a locking portion for locking the nozzle, The aforementioned locking portion is A first position for locking the nozzle in the state in which it is inserted into the cap portion, A work machine configured to be displaceable between a second position, which releases the locking of the nozzle when it is inserted into the cap portion, and a third position.
5. The aforementioned holder is The work machine according to claim 4, further comprising a locking mechanism for restricting the displacement of the locking portion located at the first position to the second position.
6. The work machine according to any one of claims 1, 2, and 4, wherein the holder is detachably attached to the machine body or attached to a member that is detachably attached to the machine body.
7. The aforementioned aircraft, inside the cover, The work machine according to any one of claims 1, 2, and 4, further comprising a fuel pipe holding part that holds the intermediate portion of the fuel pipe in the longitudinal direction below the holder.
8. The work machine according to claim 7, wherein the oil supply pipe holding part holds the oil supply pipe wound in a spiral shape.
9. The work machine according to any one of claims 1, 2, and 4, wherein the cap portion is cylindrical with an opening on the lower side and closed on the sides and top.