JP2007224568A - Swivel work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily insert and remove a suction hose for sucking fuel into a fuel supply pump, without eroding other tanks and equipment arrangement spaces stored in the tank cover, and when the tank cover is recessed A backhoe is provided that can prevent damage to the fuel tank due to direct contact of the recessed portion with the fuel tank.
SOLUTION: A hose accommodating portion 57, which is a space for accommodating a suction hose 54, is provided between a fuel tank 14 and a main cover that covers an outer side surface and a front surface in the left-right direction of the fuel tank 14.
[Selection] Figure 1

Description

  The present invention relates to a turning work machine such as a backhoe.

  2. Description of the Related Art Conventionally, a swivel base supported on a traveling device so as to be rotatable about a vertical swivel axis is provided, and a fuel tank for storing fuel for an engine is provided at a front portion on the right side of the swivel base and the swivel base. Provided with a tank cover that covers the fuel tank, and a main working cover that covers the left and right outer surfaces and the front surface of the fuel tank, and an upper cover that opens and closes the upper surface of the fuel tank. (See Patent Document 1).

Moreover, there exists a turning work machine provided with the fuel supply pump for supplying fuel to a fuel tank (patent document 2).
JP 2005-307453 A JP-A-2005-155070

  When the fuel oil pump is provided as a standard on the swing working machine described in Patent Document 1, the fuel oil pump is preferably disposed near the fuel tank, but the fuel oil pump is disposed on the inner side in the left-right direction of the tank cover. In this case, the inner side of the tank cover in the left-right direction is the center side in the left-right direction of the swivel base, and an excavator is attached to the right side of the front center of the swivel base from the left-right direction center part. Since the bonnet that forms the engine room is provided, if the storage place for the suction hose that forms the path for sucking fuel into the fuel oil pump is provided near the fuel oil pump, the suction hose can be taken in and out during fueling. The problem that it is difficult to occur arises.

  In addition, when the fuel supply pump is arranged in the tank cover, the hydraulic oil tank installed in the hydraulic oil tank or the swivel working machine for storing the hydraulic oil for operating the hydraulic equipment is installed in the tank cover for storing the fuel tank. The control valve, battery, etc., which integrates the control valves that control the fuel, are housed. Considering the maintainability of these hydraulic oil tank, control valve, and battery, fuel is supplied to the fuel oil pump in these arrangement spaces. It is difficult to secure a storage space for the suction hose for suction, and the hydraulic oil tank, control valve, and battery are obstructed, making it difficult for the suction hose to be taken in and out. There is a problem of being eroded.

  An object of this invention is to provide the turning work machine which solved the said problem.

The technical means taken by the present invention in order to solve the technical problem includes a swivel supported on a traveling device so as to be rotatable about a swivel axis in the vertical direction. A fuel tank for storing engine fuel is disposed at the front of the tank, and includes a main cover that covers an outer side surface and a front surface in the left-right direction of the fuel tank, and an upper cover that opens and closes the upper surface of the fuel tank. In a turning work machine provided with a cover and provided with a fuel supply pump for supplying fuel to the fuel tank,
Between the fuel tank and the main cover, a hose accommodating portion for accommodating a suction hose that constitutes a path for sucking fuel into the fuel supply pump is provided.

Moreover, it is good to provide a hose accommodating part between the left-right direction outer side surface of a fuel tank, and the side part of a main cover.
The fuel tank may be provided with a hose disposition path that is formed by recessing the fuel tank and that disposes the suction hose from the fuel supply pump to the hose accommodating portion.

The fuel oil pump may be disposed on the inner side in the left-right direction of the tank cover.
It is preferable to provide an air escaping portion for escaping the air in the fuel tank in the fuel returning portion for returning the fuel to the fuel tank.

According to the present invention, since the hose accommodating portion for accommodating the suction hose is provided between the fuel tank and the main cover covering the outer side surface and the front surface in the left-right direction of the fuel tank, the suction hose can be easily taken in and out.
Moreover, since the accommodation place of the suction hose is ensured between the fuel tank and the main cover, the arrangement space of other tanks and devices accommodated in the tank cover will not be eroded.

  Furthermore, since there is a suction hose storage space between the fuel tank and the main cover, if the part corresponding to the hose storage part of the main cover of the tank cover comes into contact with something and the part is recessed, It is possible to prevent the fuel tank from being damaged due to the indented portion directly contacting the fuel tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 7, reference numeral 1 denotes a backhoe exemplified as a turning work machine. In the present embodiment, a rear small turning type backhoe 1 is exemplified.
The backhoe 1 includes a lower traveling device 2 and an upper swing body 3.
The traveling device 2 is constituted by a crawler traveling device driven by a traveling motor composed of a hydraulic motor, and a dozer 4 is provided at the front portion of the traveling device 2, and the blade of the dozer 4 is constituted by a dozer cylinder composed of a hydraulic cylinder. It is swung up and down.

  The swivel body 3 is supported on the travel device 2 via a swivel bearing 6 so as to be pivotable around a swivel axis X in the vertical direction, and a swivel base 7 swiveled in both left and right directions by a swivel motor composed of a hydraulic motor. The excavator 8 provided on the swivel 7, the cabin 9 that forms the cab, the engine 11, the radiator 12, the battery 13, and the like, the fuel tank 14 that stores the fuel for the engine 11, and the hydraulic device Tanks such as a hydraulic oil tank 15 for storing oil, a control valve 16 for controlling hydraulic equipment installed in the backhoe 1, and the like are included.

As shown in FIGS. 8 and 9, the swivel base 7 has a swivel board 17 made of a thick plate that constitutes the bottom of the swivel base 7, and is used for mounting tanks, equipment, and the like on the swivel board 17. A turning frame formed by welding and fixing an attachment member, a reinforcing member, or the like is provided.
A weight (protector) 18 is attached to the rear end side of the swivel board 17 to constitute the rear portion of the swivel base 7 and to balance the weight with the excavator 8.

Further, a pivotal support portion 21 made of a cylindrical member that supports the swing bracket 19 so as to be swingable left and right around the vertical axis is provided slightly to the right of the center portion in the left and right direction on the front end side of the swivel board 17. .
The excavator 8 has a base 22 pivotally connected to the swing bracket 19 so as to be rotatable about a left-right axis, and is pivotally connected to a distal end side of the boom 22 so as to be rotatable about a left-right axis. An arm 23, a bucket 24 pivotably attached to the distal end side of the arm 23 so as to be pivotable about a left-right axis, a boom cylinder 25 that swings the boom 22, and an arm cylinder that swings the arm 23 26 and a bucket cylinder 27 for swinging the bucket 24.

The boom cylinder 25, arm cylinder 26 and bucket cylinder 27 are constituted by hydraulic cylinders.
The cabin 9 is mounted on the left side of the pivot portion 21 on the left side portion of the swivel board 17, and the engine 11 is arranged so that the axis of the crankshaft is in the left-right direction on the front side of the weight 18 at the rear portion of the swivel board 17. It is installed horizontally.

  A cooling fan 28 is provided on the right side (one side of the left and right sides) of the engine 11, the radiator 12 is disposed on the right side of the cooling fan 28, and on the right side of the pivotal support 21 of the right side portion of the swivel board 17. , A fuel tank 14, a hydraulic oil tank 15, a control valve 16, and a battery 13 are disposed. The radiator 12, the fuel tank 14, the hydraulic oil tank 15, the control valve 16, and the battery 13 are connected to a swivel board 17 through an attachment member. Is attached.

The fuel tank 14 is disposed at the front portion of the swivel board 17 (the front portion on the left and right sides of the swivel base 7), and the hydraulic oil tank 15 is disposed at the rear side of the fuel tank 14 and the front side of the radiator 12. Yes.
The hydraulic oil tank 15 is formed in a stepped shape so that the front part is lower than the rear part side, the right side of the rear part of the fuel tank 14 is formed to be recessed leftward, and the battery 13 is formed on the rear side part of the fuel tank 14. To the front side of the hydraulic oil tank 15.

  The control valve 16 collects control valves for controlling the hydraulic equipment (boom cylinder 25, arm cylinder 26, bucket cylinder 27, offset cylinder 22, turning motor, travel motor, dozer cylinder, etc.) equipped in the backhoe 1. The fuel tank 14 is arranged so as to extend from an upper part in the front-rear direction of the fuel tank 14 to an upper part of the front of the hydraulic oil tank 15.

As shown in FIGS. 7 to 12, the engine 11, its peripheral devices, and the radiator 12 are covered with a bonnet 29 constituting an engine room, and the fuel tank 14, the hydraulic oil tank 15, the control valve 16, and the battery 13 are housed therein. It is covered with a tank cover 30 constituting the chamber.
The bonnet 29 has a back cover 31 that covers the back side of the engine 11 so as to be openable and closable. The back cover 31 is supported so that the front end of the upper part is pivotable about a horizontal axis, and can swing up and down. The rear cover 31 is swung up and down to open and close the left and right side surfaces of the back of the engine room and the rear of the engine room.

The tank cover 30 includes a main cover 32 that covers the left and right outer surfaces of the fuel tank 14, the battery 13, the hydraulic oil tank 15, and the front surface of the fuel tank 14, the fuel tank 14, the battery 13, the hydraulic oil tank 15, and the control valve 16. And an upper cover 33 covering the upper surface of the main body.
In the present embodiment, the tank cover 30 is open on the back side and the left side.

Further, the front part of the right side surface of the bonnet 29 is open to the right, and the front part of the right side surface of the bonnet 29 is closed by the rear part of the main cover 32 of the tank cover 30.
The height of the upper edge of the main cover 32 of the tank cover 30 is such that the front part is low and gradually increases from the middle part to the rear part as it goes rearward. The cover 32 is formed to extend downward toward the upper edge.

A weather strip 34 is provided on the upper edge of the main cover 32 from one end to the other end.
The side surface portion 36 of the main cover 32 is divided into a front cover portion 36a and a rear cover portion 36b. The front cover portion 36a is attached and fixed to the turning board 17 together with the front surface portion 37 of the main cover 32, and the rear cover. The front edge side of the portion 36b is supported by the rear edge side of the front cover portion 36a so as to be pivotable about a vertical axis so that the rear cover portion 36b can be swung left and right. By doing so, the rear part of the right side of the storage chamber such as the fuel tank 14 and the hydraulic oil tank 15 and the front part of the right side of the engine room are opened and closed.

The upper cover 33 is pivotally attached to a support member 38 provided on the revolving substrate 17 side by a hinge so that the right side portion thereof swings up and down, and swings the upper cover 33 up and down. Thus, the upper side of the storage chamber such as the fuel tank 14 and the hydraulic oil tank 15 is opened and closed.
In the backhoe 1 having the above-described configuration, the fuel tank 14 and the hydraulic oil tank 15 can be opened from the right side portion of the engine room by opening the back cover 31 of the bonnet 29 and the rear cover portion 36b of the tank cover 30. Since the part extending over the rear part of the storage chamber can be made largely open, the part can be easily maintained.

The backhoe 1 includes a fuel supply pump 39 for supplying fuel from a fuel storage container such as a drum can to the fuel tank 14.
This fuel supply pump 39 is constituted by an electric pump, and is disposed on the left side (inward in the left-right direction) of the tank cover 30, and covers the gap 9 between the cabin 9 and the tank cover 30 of the swivel base 7. The housing 40 is housed on the lower side of 40 and is bolted to a support body 41 provided on the revolving substrate 17 side.

The fuel supply pump 39 includes a suction port 42 and a discharge port 43 that protrude rightward.
When the fuel oil pump 39 is disposed in the tank cover 30, the storage space such as the fuel tank 14 and the hydraulic oil tank 15 is eroded and the tank cover 30 can open and close the upper cover 33. However, the above-described problem does not occur by storing the fuel supply pump 39 below the gap cover 40 on the side of the tank cover 30.

  As shown in FIG. 1, a valve mounting base 44 to which the control valve 16 is attached is disposed above the fuel tank 14, and the front portion of the fuel tank 14 is the front end of the valve mounting base 44 (and the control valve 16). A fuel supply port 46, a full tank gauge 47, a full sensor 48, and a delivery hose connection 49 are provided on the upper surface of the portion of the fuel tank 14 that protrudes from the valve mounting base 44. A pump control box 50 containing a control mechanism for controlling the fuel oil pump 39 is provided on the front end side of the valve mounting base 44. The oil supply switch 51 for turning the fuel oil pump 39 ON and OFF is provided in this control box. Is provided.

The fuel supply port 46 is a fuel supply port 46 for supplying fuel to the fuel tank 14 by a fuel supply device such as a stand, and is closed by a cap 52 so as to be opened and closed.
The full tank gauge 47 displays that the fuel is full, so that it can be visually recognized that the fuel is full.
The full sensor 48 is a detector that detects that the fuel is full. A detection signal detected by the full sensor 48 is input to the pump control box 50, and the detection signal is used as a pump. When input to the control box 50, the operation of the fuel oil pump 39 is stopped even if the fuel oil switch 51 for turning the fuel oil pump 39 ON / OFF is in the ON state.

  One end side of a delivery hose 53 that constitutes a path for sending fuel discharged from the fuel supply pump 39 to the fuel tank 14 is connected to the delivery hose connection portion 49, and the other end side of the delivery hose 53 is connected to the fuel supply pump. 39, a suction port 42 of the fuel supply pump 39 is connected to one end side of a suction hose 54 constituting a path for sucking fuel into the fuel supply pump 39. This suction hose A suction filter 56 is provided on the other end side of 54.

In the present embodiment, the fuel oil pump 39 is activated by placing the suction filter 56 in the fuel storage container and turning on the oil supply switch 51, and fuel is supplied to the fuel oil pump 39 via the suction hose 54. Is inhaled and the fuel supply pump 39 is stopped when it is detected by the full sensor 48 that the fuel is full.
Conventionally, the fuel tank is formed along the inner surface of the main cover 32 of the tank cover 30, and a large space that can accommodate the suction hose 54 is not formed between the fuel tank and the tank cover 30. 1 to 4, the suction hose 54 is accommodated between the front portion of the outer side surface of the fuel tank 14 in the left-right direction and the main cover 32 (the side surface portion 36) of the tank cover 30. A hose accommodating portion 57 is formed as a space for this purpose.

In the present embodiment, the hose accommodating portion 57 has a front portion on the outer side in the left-right direction of the fuel tank 14 on the left side (inner side of the tank) as compared with the fuel tank formed along the inner surface of the main cover 32. The hose accommodating portion 57 that is open upward is formed between the fuel tank 14 and the main cover 32.
Thus, since the hose accommodating portion 57 is provided on the outer side in the left-right direction of the tank cover 30, the suction hose 54 can be easily inserted and removed from the upper side of the hose accommodating portion 57 by opening the upper cover 33.

  The hose accommodating portion 57 may be provided between the front side of the fuel tank 14 and the front portion 37 of the main cover 32, and the hose accommodating portion 57 is connected to the front side of the fuel tank 14 and the front surface of the main cover 32. Even if it is provided between the portions 37, the suction hose 54 is easier to put in and out than the center of the swivel base 7, but the suction hose 54 is long and wound and accommodated in the hose accommodating portion 57. Therefore, in order to accommodate the suction hose 54 in a wound shape, the horizontal length of the hose winding portion in the hose housing portion (the hose housing portion 57 is connected to the front side of the fuel tank 14 and the main cover). When it is provided between the front surface portion 37 of the fuel tank 32 and the front surface portion 37 of the fuel tank 14 is required to some extent, this housing length is sufficient between the front side of the fuel tank 14 and the front surface portion 37 of the main cover 32. When It may not.

  On the other hand, between the outer side surface in the left-right direction of the fuel tank 14 and the side surface portion 36 of the main cover 32, the aforementioned accommodation length (accommodation length in the front-rear direction in the embodiment shown in FIG. Since it can be taken sufficiently, the suction hose 54 can be taken into and out of the hose accommodating portion 57 more easily than when the hose accommodating portion 57 is provided between the front side of the fuel tank 14 and the front portion 37 of the main cover 32.

Further, when the portion corresponding to the hose accommodating portion 57 of the main cover 32 of the tank cover 30 comes into contact with something and the portion is recessed, the fuel tank is formed by the contact of the recessed portion directly with the fuel tank 14. 14 damage can be prevented.
Further, as shown in FIGS. 1 and 5, a hose arrangement path 58 formed in a stepped shape by recessing the fuel tank 14 protrudes forward in a plan view at the upper part on the front side of the fuel tank 14. The suction hose 54 is arranged in the hose arrangement path 58 from the fuel oil pump 39 side to the hose accommodating portion 57.

Further, as shown in FIG. 4, the bottom of the hose accommodating portion 57 is constituted by a bottom edge wall 59 extending from the lower end of the main cover 32, and is accommodated in the hose accommodating portion 57 on the bottom edge wall 59. The suction hose 54 is placed so as not to fall downward.
By providing the hose arrangement path 58 in the fuel tank 14, the suction hose 54 arranged from the fuel supply pump 39 side to the hose accommodating portion 57 can be accommodated.

In addition, a clamp 60 is provided at the front of the upper surface of the fuel tank 14 to hold the suction hose 54 disposed in the hose arrangement path 58 and prevent the suction hose 54 from being detached from the hose arrangement path 58. The clamp 60 is made of a plate material and is bolted to the fuel tank 14.
The clamp 60 is disposed slightly to the left of the central portion of the hose arrangement path 58 in the left-right direction.

A filter housing member 61 that houses a suction filter 56 provided on the other end side of the suction hose 54 is provided on the rear side of the hose housing portion 57.
As shown in FIG. 6, the filter housing member 61 is formed of a cylindrical member having an axial center arranged in the vertical direction, and the upper surface side is opened to insert the suction filter 56, and the lower end side is the suction filter 56. The remaining fuel is blocked by the bottom wall 62 so as to collect in the filter housing member 61.

The filter housing member 61 is detachably held by a holder 64 attached to a support bracket 63 fixed to the bottom edge wall 59 of the main cover 32.
The support bracket 63 includes a lower wall 63a fixed to the bottom edge wall 59 of the main cover 32, a front wall 63b extending upward from the front end of the lower wall 63a, and an upper side from the rear end of the lower wall 63a. And the rear wall 63c is formed higher than the front wall 63b, and the filter housing member 61 is disposed on the lower wall 63a of the support bracket 63. Has been.

The holder 64 is superposed on the front surface of the upper portion of the rear wall 63c of the support bracket 63 and is bolted to the rear wall 63c. The holder 64 extends forward from both the left and right sides of the mounting wall 64a and accommodates the filter. And left and right arm portions 64b formed to hold the member 61.
The filter housing member 61 is provided with a handle member 65. The handle member 65 is formed of a bar, and the lower end side is fixed to the filter housing member 61 and extends upward from the filter housing portion 61. The upper end side is bent in an arc shape that protrudes upward.

In this embodiment, when the suction hose 54 is taken out from the hose accommodating portion 57, the hose winding portion of the suction hose 54 is taken out from the hose accommodating portion 57 and the handle member 65 is gripped to hold the filter accommodating member. 61 is taken out.
When the suction hose 54 is housed in the hose housing portion 57, the other end of the suction hose 54 is wound and the suction filter 56 is housed in the filter housing member 61. The filter housing member 61 is inserted into the hose housing portion 57 and inserted between the left and right arm portions 64 b of the holder 64 while being accommodated in the hose housing portion 57 from above and holding the handle member 65.

As shown in FIGS. 1 and 13, a fuel return portion 66 is provided on the front upper surface of the fuel tank 14 to return the fuel overflowed from the injection pump that injects fuel into the combustion chamber of the engine 11 to the fuel tank 14. Yes.
The fuel return portion 66 includes a mounting plate 68 bolted to a mounting seat 67 provided in the fuel tank 14, a vertical tube 69 fixed to the mounting plate 68, and a vertical middle portion of the vertical tube 69. It has a fixed hose connection pipe 70 and a breather pipe (air escape portion) 71 extending forward from the upper end of the vertical pipe 69.

  The vertical pipe 69 communicates with the inside of the fuel tank 14 through communication holes 72 and 73 formed in the mounting plate 68 and the upper wall of the fuel tank 14. A fuel return hose 74 is connected to the hose connection pipe 70. The fuel that is connected and overflows from the injection pump is returned to the fuel tank 14 through the fuel return hose, the hose connection pipe 70, the vertical pipe 69, and the communication holes 72 and 73.

In addition, when fuel is supplied by the fuel supply pump 39, the air in the fuel tank 14 escapes to the outside through the communication holes 72 and 73, the vertical pipe 69 and the breather pipe 71.
Further, an air discharge portion may be provided at a high position away from the fuel tank 14 and the air discharge portion and the breather pipe 71 may be connected by a hose 75 or the like.
When fuel is supplied by the fuel supply pump 39, the cap 52 that closes the fuel supply port 46 may be opened to open the fuel supply port 46 so that the air in the fuel tank 14 is released to the outside. However, in this embodiment, the cap 52 is not forgotten to be opened or closed, and a breather pipe 71 is provided in the fuel return portion 66 that is conventionally required. Therefore, there is no need for a separate space for providing an air escape portion for allowing air in the fuel tank 14 to escape.

14 to 16 show other examples of the air vent structure of the fuel tank 14.
FIG. 14A shows a breather tube 71 extending from a vertical tube 69 in the axial direction, and other configurations are the same as those in the above embodiment.
In this structure, for example, as shown in FIG. 15, one end side of the rubber tube 76 is connected to the breather pipe 71, and the middle portion of the rubber tube 76 is disposed at a position higher than the fuel tank 14. .

In FIG. 14B, an air escape portion is configured by a through hole 77 formed in the upper portion of the vertical tube 69.
In this case, the inner hole 78 in the vertical tube 69 is formed so that the upper side of the hose connection tube 70 is larger in diameter than the lower side, and the upper end of the inner hole 78 of the vertical tube 69 is blocked by the plug 79. The ball 80 is housed in the large-diameter portion 78a of the inner hole 78 of the vertical tube 69, and the ball 80 is biased downward by a spring 81. Normally, the small-diameter portion 78b of the inner hole 78 of the vertical tube 69 is used. When the upper end is closed by the ball 80 and the internal pressure in the fuel tank 14 increases, the air in the fuel tank 14 is pushed up against the urging force of the spring 81 by the air in the fuel tank 14, so that the air in the fuel tank 14 is passed through the through hole. 77 is configured to escape.

In the configuration shown in FIG. 16, the vertical tube 69 is formed long in the vertical direction, and the through holes 77 constituting the air escape portion are radially formed radially on the upper end side of the upper end vertical tube 69 of the inner hole 78 of the vertical tube 69. Formed.
FIGS. 17 to 20 show other examples of the hose accommodating portion 57.
In this case, a hose accommodating portion 57 is formed between the fuel tank 14 and the main cover 32 by recessing a corner portion 82 between the front surface and the outer surface of the fuel tank 14.

A corner portion 82 on the right side of the front portion of the fuel tank 14 is formed on an inclined surface that moves inward in the left-right direction as it goes forward.
Further, a reinforcing member 83 is provided at the upper and inner corner of the front right side of the main cover 32 of the tank cover 30, and the reinforcing member 83 is formed by a round bar, and both ends are the inner surfaces of the main cover 32. The reinforcement hose 54 prevents the suction hose 54 from interfering with the main cover 32. The reinforcement member 83 prevents the interference from the suction hose 54 from interfering with the main cover 32.

In addition, a tray 84 is provided at the bottom of the hose accommodating portion 57 to prevent the fuel from dropping downward from the suction filter 56, and this tray is fixed to the bottom edge wall 59 of the main cover 32. The reinforcement member 83 and the reinforcing effect of the main cover 32 are exhibited.
17 to 20, the full tank sensor 48 is not provided, and the fuel supply switch 51 of the pump control box 50 is manually turned off when the fuel is full while looking at the full tank gauge 47. To.

  Other configurations are the same as those in the above embodiment.

It is a plane partial sectional view of the right front part of a turntable. It is side surface partial sectional drawing of the right front part of a turntable. It is a front fragmentary sectional view of the right front part of a turntable. It is a back sectional view of a hose storage part. It is sectional drawing of the clamp part of a suction hose. (A) is a top view of a suction filter accommodation part, (b) is a side view of a suction filter accommodation part. It is a right view of a backhoe. It is a right view of a turntable. It is a top view of a turntable. It is a right view of the swivel base which shows the state which opened the back cover part of the bonnet, the rear cover part of the main cover of the tank cover, and the upper cover. It is a top view of the turntable which shows the state which opened the back cover part of the bonnet, the rear cover part of the main cover of the tank cover, and the upper cover. It is a perspective view of the swivel stand which shows the state which opened the back cover part of the bonnet, the rear cover part of the main cover of the tank cover, and the upper cover. It is a figure which shows the return part to the fuel tank of the return fuel, Comprising: (a) is a top view, (b) is sectional drawing which the upper part side represented the side surface cross section, and the lower part side represented the front surface cross section. It is sectional drawing which shows the other example of a fuel return part. It is a figure which shows the example of arrangement | positioning of the rubber tube for air bleeding. It is a figure which shows the other example of a fuel return part, Comprising: (a) is a plane partial sectional view, (b) is sectional drawing with which the upper side represented the side surface cross section, and the lower part side represented the front cross section. It is a partial plane sectional view which shows the other example of a hose accommodating part. It is side surface partial sectional drawing which shows the other example of a hose accommodating part. It is a top view of the main cover of the tank cover which shows the other example of a hose accommodating part. It is a back sectional view showing other examples of a hose accommodating part.

Explanation of symbols

2 traveling device 7 swivel base 11 engine 14 fuel tank 30 tank cover 32 main cover 33 upper cover 36 side face portion 39 fuel supply pump 54 suction hose 57 hose accommodating part 58 hose arrangement path 66 fuel return part 71 escape path 77 escape path X Slewing axis

Claims (5)

A swivel base (7) is provided on the travel device (2) so as to be rotatable about a vertical swivel axis (X), and an engine (11) is provided at the front of the swivel base (7) on the left and right sides. ) Is disposed, and a main cover (32) that covers the left and right outer side surfaces and the front surface of the fuel tank (14), and an upper surface of the fuel tank (14) are opened and closed. In a swivel working machine provided with a tank cover (30) comprising an upper cover (33) and provided with a fuel oil pump (39) for supplying fuel to the fuel tank (14),
Provided between the fuel tank (14) and the main cover (32) is a hose accommodating portion (57) for accommodating a suction hose (54) that constitutes a path for sucking fuel into the fuel oil pump (39). A swivel work machine characterized by   The turning work machine according to claim 1, wherein the hose accommodating portion (57) is provided between a laterally outer side surface of the fuel tank (14) and a side surface portion (36) of the main cover (32). .   A hose formed in the fuel tank (14) by recessing the fuel tank (14) for disposing the suction hose (54) from the fuel oil pump (39) to the hose accommodating part (57). The turning work machine according to claim 1 or 2, characterized in that an arrangement path (58) is provided.   The turning work machine according to any one of claims 1 to 3, wherein the fuel supply pump (39) is arranged on the inner side in the left-right direction of the tank cover (30). The fuel return part (66) for returning the fuel to the fuel tank (14) is provided with an air release part (71, 77) for releasing the air in the fuel tank (14). The turning work machine in any one of.

Images