JP2004156334A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic shovel 11 capable of using a number of parts in common to the different specifications of a revolving superstructure 14. <P>SOLUTION: The hydraulic backhoe 11 has a lower structure 12 and the upper revolving body 14 revolving to the lower structure 12. A peripheral section 75 in which both side sections 75a and 75b are formed in an approximately U shape extensively over a rear section 75c from both side sections 75a and 75b in a linear shape in the longitudinal direction is formed to the upper revolving body 14. A driver's seat 40 is mounted inside the peripheral section 75 on the upper revolving body 14, and a fuel tank 64 and covers 51 and 56 are secured to the peripheral section 75 of the upper revolving body 14. The shapes of both side sections 75a and 75b of the peripheral section 75 of the upper revolving body 14 are not changed as the side sections 75a and 75b are left as they are formed in the linear shape, and the fuel tank 64 of the peripheral section 75 and the covers 51 and 56 or the like can be used as they are even in the case of the different specifications of a length in the longitudinal direction of the upper revolving body 14. A number of the parts can be used in common including the fuel tank 64 and the covers 51 and 56 or the like to the different specifications of the upper revolving body 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a work machine that can use many common parts for different specifications of an upper-part turning body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hydraulic shovel as a working machine includes a lower traveling body capable of self-propelling, and an upper revolving body rotatably provided above the lower traveling body, and a driver's seat is provided on the upper revolving body. . Hydraulic excavators include a specification having a cab that covers a driver's seat and a specification including a canopy.
[0003]
In the case of relatively large and medium-sized hydraulic excavators, the engine, fuel tank, etc. are arranged behind the upper revolving structure with respect to the driver's seat arranged in front of the upper revolving structure, so that there is relatively room around the driver's seat. Therefore, in many cases, a common cab having the same size and shape is configured to be attached to the upper swing body, and the cab is commonly used.
[0004]
2. Description of the Related Art A relatively small hydraulic shovel is a small slewing type excavator in which a peripheral shape on both sides and a rear side of an upper slewing body is circular, and a slewing range of the upper slewing body is within an outer range of a lower traveling body. In the case of this excavator, since the engine and fuel tank are placed close to the driver's seat, it is difficult to install a common cab as it is, and processing such as cutting off the part where the cab interferes around the driver's seat (See, for example, Patent Document 1).
[0005]
[Patent Document 1]
JP-A-9-316931 (pages 1 to 4, FIGS. 1 to 17)
[0006]
[Problems to be solved by the invention]
By the way, there is a demand for a hydraulic excavator that is smaller than a conventional small hydraulic excavator in order to enable a hydraulic excavator to work on an alley in an urban area. However, when the hydraulic excavator is further miniaturized, the size of the upper revolving structure becomes smaller, and it is difficult to attach a common cab to the driver's seat of the upper revolving structure in terms of space.
[0007]
Therefore, if the purpose is to use a common cab in a more miniaturized hydraulic excavator, it is conceivable to create a specification in which the size is changed so that only the upper slewing body can be attached to the common cab, To change the size of an upper revolving unit with a circular shape like a conventional small hydraulic excavator, it is often necessary to include a revolving frame inside the upper revolving unit and the outside, for example, a fuel tank and a cover. Of the upper revolving unit, and it is difficult to share parts with different specifications of the upper structure.
[0008]
The present invention has been made in view of such a point, and an object of the present invention is to provide a work machine that can use many parts in common for different specifications of an upper-part turning body.
[0009]
[Means for Solving the Problems]
The invention described in claim 1 is a lower traveling body and a peripheral portion which is provided so as to be pivotable with respect to the lower traveling body, and has a substantially U-shape from both sides to the rear with both sides being straight in the front-rear direction. An upper revolving structure, a driver seat provided on the inner side of the upper revolving structure, an engine provided in the upper revolving structure, and a fuel provided in a peripheral portion of the upper revolving structure and supplied to the engine. And a cover provided on the periphery of the upper revolving unit and opening and closing the inside of the upper revolving unit. Has a peripheral portion formed in a substantially U-shape, and a structure in which a fuel tank and a cover are provided in the peripheral portion is adopted. Around the body Side remains without changing the shape of straight, such as a fuel tank or cover provided on the periphery as it is available, therefore, can be shared many parts with respect to different specifications of the upper rotating body.
[0010]
According to a second aspect of the present invention, in the working machine according to the first aspect, the engine is provided below the driver's seat of the upper revolving unit, and both sides of the upper revolving unit with respect to the driver's seat. Can be realized in a substantially U-shaped peripheral portion which is linear in the front-rear direction and extends from both sides to the rear.
[0011]
According to a third aspect of the present invention, there is provided the working machine according to the first or second aspect, further including a cab mounted on an inner side of a peripheral portion on the upper rotating body. Can be attached to the inside of the peripheral portion on the upper revolving structure with different lengths in the front-rear direction.
[0012]
According to a fourth aspect of the present invention, there is provided the working machine according to the first or second aspect, further comprising a canopy mounted inside the peripheral portion on the upper rotating body. Can be attached to the inside of the peripheral portion on the upper revolving structure with different lengths in the front-rear direction.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described below with reference to FIGS.
[0014]
FIG. 1A and FIGS. 2 to 4 show a hydraulic excavator 11 as a small turning type working machine of the first specification dedicated to a canopy. In the hydraulic excavator 11, an upper revolving unit 14 of the first specification is rotatably mounted above a self-propelled lower traveling unit 12 via a revolving shaft unit 13. The lower traveling unit 12, the revolving shaft unit 13, and the upper revolving unit 14 constitute a work machine main body 15.
[0015]
The lower traveling body 12 has a traveling machine stand 19 having a turning shaft 13 attached to the upper surface, and traveling devices 21 having crawler belts 20 capable of self-propelling are attached to both sides of the traveling machine stand 19. Each traveling device 21 includes a traveling motor (not shown) which is a hydraulic motor as a fluid pressure operating device for rotating the crawler belt 20.
[0016]
On the front side of the traveling machine base 19 of the lower traveling body 12, a substantially rectangular blade 22 whose longitudinal direction is a direction intersecting the traveling direction of the lower traveling body 12 is attached to be vertically movable. The blade 22 is moved up and down by a blade cylinder (not shown) which is a hydraulic cylinder as a fluid pressure operating device.
[0017]
The upper revolving unit 14 is formed in a peripheral shape in which both sides are straight and parallel in the front-rear direction and the rear portion is curved, and the revolving range of the upper revolving unit 14 is lower than the outer range of the lower traveling unit 12. It is configured as a small turning type that does not project from the traveling body 12 in the front-rear direction or in the left and right sides. The upper revolving unit 14 has a revolving frame 25 attached to the lower traveling unit 12 via the revolving shaft 13. The revolving frame 25 pivots the upper revolving unit 14 horizontally with respect to the lower traveling unit 12. A turning motor (not shown), which is a hydraulic motor as a fluid pressure operating device to be driven, is attached.
[0018]
On the front side of the revolving frame 25, a connection protruding portion 26 having a substantially triangular shape in a plan view and protruding forward from the upper revolving unit 14 is provided. A working device 27 for excavation work is attached to the distal end of the connecting protrusion 26. The working device 27 includes hydraulic cylinders 28, 29, 30 as a plurality of fluid pressure operating devices for operating the working device 27.
[0019]
At a rear portion on the revolving frame 25, a power device housing portion 31 protruding above the front side of the upper revolving structure 14 is provided. The power device housing portion 31 includes a seat frame 32 serving as a frame of the power device housing portion 31. The seat frame 32 includes an upper frame portion 33, and the frame portion 33 is supported on upper ends of a plurality of legs 34 erected on the revolving frame 25. The seat frame 32 is formed so that both sides are straight and parallel in the front-rear direction and the rear part is curved, corresponding to the peripheral shape of the upper swing body 14.
[0020]
On the rear side of the revolving frame 25 and inside the seat frame 32, an engine 35, a muffler 36 for silencing an exhaust sound accompanying the exhaust from the engine 35, and a working oil as a working fluid driven by the engine 35 are provided. Power is supplied to a hydraulic pump (not shown) as a hydraulic pump for supplying pressurized pressure, a hydraulic oil tank 37 as a hydraulic fluid tank for storing hydraulic oil circulated by the hydraulic pump, an instrument of the hydraulic shovel 11, an engine 35, and the like. And a battery (not shown).
[0021]
A control valve (not shown) is attached to the front side of the turning frame 25. This control valve controls the hydraulic oil to be pressurized and supplied from the hydraulic pump to each of the above-described fluid pressure operating devices, and activates each mechanism corresponding to each of the fluid pressure operating devices.
[0022]
A driver's seat 40 as a seat on which an operator who operates and operates the hydraulic shovel 11 sits is mounted on an upper portion of the seat frame 32. The driver's seat 40 includes a seat plate portion 41 located above the seat frame 32. The seat plate portion 41 has a backrest portion serving as a backrest for an operator sitting on the seat plate portion 41. 42 is attached so as to be adjustable in angle. The seat plate 41 is turned around the rear end of the seat plate 41 by a hinge (not shown) attached to the rear side of the frame portion 33 of the seat frame 32. It is possible to move. By rotating the seat plate portion 41 backward, an opening (not shown) formed inside the frame portion 33 of the seat frame 32 is opened, that is, the upper surface of the power device housing portion 31 is opened. You.
[0023]
On both sides of the driver's seat 40, a pair of console boxes 43 as console portions serving as armrests of an operator sitting in the driver's seat 40 are provided. The pair of console boxes 43 are attached to upper surfaces on both sides of the frame portion 33 of the seat frame 32. An operation panel 44 having a display unit, a dial-type accelerator as a switch, a starter switch, a light switch, and the like is attached to upper portions of the pair of console boxes 43. A pair of operation levers 45 as operation devices for operating the working device 27 are attached to upper front portions of the pair of console boxes 43.
[0024]
A floor plate 46 on which the feet of the operator sitting on the driver's seat 40 is placed is mounted on the front side of the driver's seat 40 on the revolving frame 25, and a pedal 47 for operating the lower traveling body 12 is mounted on the front side of the floor plate 46. Have been.
[0025]
By the operation of the operation lever 45 and the pedal 47, the hydraulic oil to be pressurized and supplied from the control valve to each of the above-described fluid pressure operating devices is controlled, and each mechanism corresponding to each fluid pressure operating device is operated.
[0026]
Both sides of the seat frame 32 are formed with openings 50 on both sides which open between the frame 33 and the front and rear legs 34, and these openings 50 are provided with covers 51 on both sides as side covers. Each is installed so that it can be opened and closed. The covers 51 on both sides are formed so that the front side is linear in the front-rear direction along the shape on both sides of the upper swing body 14, and the rear side is curved so as to go around the rear side of the upper swing body 14. It has a side surface cover portion 52 that covers the side surface and an upper surface cover portion 53 that is curved from the upper side of the side surface cover portion 52 toward the frame portion 33 of the seat frame 32. The covers 51 on both sides are openably and closably attached to hinges 54 attached to both sides of the upper swing body 14 so as to open outward and downward and open downward, and are closed so as to close the opening 50. It is locked to the seat frame 32 by a bolt (not shown) which is detachable.
[0027]
A rear opening 55 is formed on the rear side of the seat frame 32 so as to open between the frame portion 33 and the pair of rear legs 34. The rear opening 55 has a cover as a rear cover. 56 is attached so that opening and closing are possible. The rear cover 56 has a substantially flat plate shape and is curved along the rear curved shape of the upper revolving unit 14. The rear cover 57 covers the rear surface of the opening 55, and the rear cover 57 is formed of the rear cover 57. An upper surface cover portion 58 is curved from the upper side toward the frame portion 33 of the seat frame 32. The rear cover 56 is attached by a hinge 59 attached to the frame portion 33 of the seat frame 32 so as to be openable and closable so as to open upward and rearward upward, and is closed so as to close the opening 55. In this state, it is locked to the seat frame 32 by a bolt (not shown) which is detachable.
[0028]
On the front side of the seat frame 32, a front opening 60 is formed between the frame portion 33 and the pair of front legs 34. The front opening 60 has a flat cover 61 as a front cover. Is installed so that it can be opened and closed. The cover 61 removably covers and protects mainly the battery housed in the seat frame 32.
[0029]
A fuel tank 64 for storing fuel to be supplied to the engine 35 is mounted on the right side, which is one side in front of the upper frame 14 with respect to the seat frame 32. The fuel tank 64 is provided with a fuel filler port (not shown) at an upper part thereof, and a cap 65 for opening and closing the fuel filler port is detachably attached. The side surface and the upper surface of the fuel tank 64 are formed to be continuous with the side cover portion 52 and the upper surface cover portion 53 of the cover 51 on one side, and are curved from the upper surface to the front surface.
[0030]
On the left side, which is the other side in front of the upper frame 14 with respect to the seat frame 32, a boarding / alighting section 68 for an operator to get on and off the driver's seat 40 is formed.
[0031]
A fender 71 is attached around the revolving frame 25 of the upper revolving unit 14 from both sides to the front side, and a counterweight for balancing mass with the working device 14 mounted on the front side of the upper revolving unit 14 on the rear side. 72 are attached.
[0032]
The upper swing body 14 has a peripheral portion 75 in which both side portions 75a and 75b are linear and parallel in the front-rear direction, the rear portion 75c is curved, and the both sides 75a and 75b are formed substantially U-shaped from the rear portion 75c. The driver's seat 40 is provided on the seat frame 32 inside the peripheral portion 75. A fuel tank 64 and a cover 51 are provided on one side 75a of the peripheral portion 75 of the upper revolving unit 14, a boarding / alighting portion 68 and a cover 51 are provided on the other side 75b, and a cover 56 and a counter are provided on a rear portion 75c. A weight 72 is provided. The width of both sides 75a, 75b of the peripheral portion 75 of the upper swing body 14 is formed to be substantially the same width, and the width of the rear portion 75c is also formed to be substantially the same width.
[0033]
In addition, as shown in FIGS. 2 and 3, in the hydraulic shovel 11 of the first specification dedicated to the canopy, a canopy 78 that covers the upper part of the driver's seat 40 is attached. The canopy 78 has a pair of canopy struts 79 erected on both sides of the upper surface of the frame portion 33 of the seat frame 32. At the upper ends of the canopy struts 79, an operator seated in the driver's seat 40 is mainly viewed from above. A canopy top 80 is provided to protect from sunlight or obstacles or falling objects. The canopy support 79 is detachably attached to attachment portions 81 provided on both sides of the driver's seat 40 on the frame portion 33 of the seat frame 32 by fastening means such as bolts.
[0034]
A guard 82 is provided upright on the front side of the floor plate 46 of the upper swing body 14, and a handrail 83 is attached to the seat frame 32 at the rear side of the boarding / unloading section 68 so as to be easily gripped when the operator gets on and off the board. .
[0035]
FIGS. 1B and 5 show a hydraulic excavator 11a as a small-swing type working machine of the second specification which is also used as a canopy and a cab. This hydraulic shovel 11a is obtained by changing only the upper swing body 14 of the above-described hydraulic shovel 11 of the first specification so as to expand and extend only in the front-rear direction without changing both side widths. The basic structure is the same as that of the first specification. It is the same as the excavator 11. The longitudinal length of the upper swing body 14 of the hydraulic shovel 11 of the first specification is L1, whereas the longitudinal length of the upper swing body 14 of the hydraulic shovel 11a of the second specification is L2, L1 < L2 has a length relationship in the front-rear direction. Thus, for example, when using a common cab 91 having the same size and shape as a hydraulic shovel of another model having a different size, the hydraulic shovel 11 of the first specification can be attached because the space in the front-rear direction is small. Even in a difficult case, a common cab 91 can be attached to the hydraulic shovel 11a of the second specification.
[0036]
The extension of the upper revolving unit 14 in the front-rear direction of the hydraulic shovel 11a of the second specification mainly extends the revolving frame 25 in the front-rear direction with respect to the hydraulic shovel 11 of the first specification, and the front side and the rear side of the revolving frame 25. The structure arranged on the side responds by shifting to the front and the rear, respectively. Therefore, the extension of the turning frame 25 in the front-rear direction is a shape in which the intermediate portion of the turning frame 25 is extended in the front-rear direction.
[0037]
The upper revolving unit 14 has a peripheral portion 75 in which both sides 75a and 75b are linear and parallel in the front-rear direction, a rear part 75c is curved, and a substantially U-shaped part is formed from both sides 75a and 75b to the rear part 75c. Since the structure in which the fuel tank 64, the covers 51 and 56, the counterweight 72, and the like are provided in the peripheral portion 75 is adopted, even if the upper revolving structure 14 is extended in the front-rear direction, the peripheral portion 75 of the upper revolving structure 14 The straight sides 75a, 75b remain straight and have no shape change.
[0038]
Therefore, parts that differ between the hydraulic shovel 11a according to the second specification and the hydraulic shovel 11 according to the first specification include a turning frame 25, a floor plate 46, a fender 71, and the like having different lengths in the front-rear direction. And a harness for electrically connecting devices around the driver's seat 40 to a control unit disposed in the upper revolving unit 14 and the like.
[0039]
Except for the parts that are different between the hydraulic shovel 11a of the second specification and the hydraulic shovel 11 of the first specification, the hydraulic shovel 11a of the second specification and the hydraulic shovel 11 of the first specification can be used in common. Drive-related components including the engine 35 and the like, hydraulic circuit-related components including the hydraulic pump and the hydraulic oil tank 37, the driver's seat 40 and operation systems around the driver's seat 40, the covers 51 and 56, and the fuel tank 64 The counter weight 72 and the like can be commonly used.
[0040]
As described above, the upper swing body 14 of the hydraulic shovel 11a of the second specification has a substantially U-shape in which the both sides 75a, 75b are straight and parallel in the front-rear direction, the rear part 75c is curved, and the side parts 75a, 75b to the rear part 75c. And a fuel tank 64, covers 51 and 56, a counterweight 72, and the like are provided in the peripheral portion 75, so that the hydraulic shovel 11a of the second specification can be used. On the other hand, even if the upper revolving unit 14 is extended in the front-rear direction in order to mount the cab 91, the side portions 75a and 75b of the peripheral portion 75 of the upper revolving unit 14 remain linear and have no shape change. The fuel tank 64, the covers 51 and 56, the counterweight 72, and the like, which are provided, can be used as they are. It can be shared many parts against and 2 of the specification.
[0041]
The cab 91 has a box-shaped cab body 92, and transparent windows 93 are respectively formed on the front, both side surfaces, and the rear surface of the cab body 92. An entrance 92a is formed, and a door 94 is attached to the entrance 92a so as to be openable and closable.
[0042]
The lower edge of the cab body 92 is disposed inside the peripheral portion 75 of the upper revolving unit 14, and the mounting portion 81 and the floor plate 46 provided on both sides of the driver's seat 40 on the frame portion 33 of the seat frame 32 are provided with bolts and the like. Are detachably attached by the fastening means.
[0043]
As shown in FIGS. 7 and 8, a packing 95 is attached to the lower edge of the cab main body 92 to prevent the upper revolving unit 14 from rattling and to secure the airtightness. As for the portion of the fuel tank 64, the packing 95 is joined and sealed from the upper surface to the front surface of the fuel tank 64, as shown by a sealing position S in the figure. The fuel supply port of the fuel tank 64 is curved so as to bypass the inside of the cab body 92. Therefore, the fuel tank 64 is located at an intermediate position between the inside and outside of the cab 91, and has a structure protruding inside and outside the cab 91.
[0044]
In the case of the cab 91, the guard 82 and the handrail 83 used in the case of the canopy 78 are not attached to the upper swing body 14 side. The cab body 92 has a guard function, and a handrail 96 is attached to the cab body 92 on the side of the entrance 92a.
[0045]
In addition, in the hydraulic shovel 11 a of the second specification, in addition to the cab 91, as shown in FIG. 6, a canopy 78 common to the hydraulic shovel 11 of the first specification is attached to the seat frame 32 inside the peripheral portion 75. Can be attached.
[0046]
Therefore, according to the present embodiment, upper revolving unit 14 is formed in a substantially U-shape from both side portions 75a, 75b to rear portion 75c, with both side portions 75a, 75b being straight and parallel in the front-rear direction and rear portion 75c being curved. And a fuel tank 64, covers 51 and 56, a counterweight 72, and the like are provided in the peripheral portion 75, so that the first revolving structure 14 has different lengths in the front-rear direction. In both the specification and the second specification, the side portions 75a, 75b of the peripheral portion 75 of the upper revolving structure 14 are straight and have no shape change, and the fuel tank 64, the covers 51, 56, and the counter provided in the peripheral portion 75 are provided. The weight 72 and the like can be used as they are, so that many parts can be shared for different specifications of the upper swing body 14.
[0047]
By mounting the seat frame 32 on the upper revolving unit 14 and mounting the driver's seat 40 on the seat frame 32, the engine 35 and the hydraulic oil tank 37 can be arranged below the driver's seat 40. For this reason, both sides 75a, 75b of the upper revolving structure 14 are straight and parallel in the front-rear direction with respect to the driver's seat 40, and the rear part 75c is curved, forming a substantially U-shape from both sides 75a, 75b to the rear part 75c. The peripheral portion 75 can be realized.
[0048]
Further, in the hydraulic shovel 11 of the first specification dedicated to the canopy, the length of the upper revolving structure 14 in the front-rear direction is shorter than that of the second specification, and the turning range of the upper revolving structure 14 is smaller than that of the second specification. Can be smaller.
[0049]
In addition, the hydraulic shovel 11a of the second specification, which is used for both the canopy and the cab, can attach a common cab 91 having the same size and shape as other models, and replace the cab 91 with the first specification and the size. A common canopy 78 having the same shape can be attached, and parts can be shared with the hydraulic shovel 11 of the first specification, and parts such as the cab 91 and the canopy 78 of other models and specifications can be shared. Can be achieved.
[0050]
【The invention's effect】
According to the first aspect of the present invention, the upper revolving structure has a peripheral portion having both sides linearly formed in the front-rear direction and formed substantially in a U-shape from both sides to the rear. For example, even in the case of specifications in which the length of the upper revolving structure in the front-rear direction is different, both sides of the peripheral portion of the upper revolving structure remain linear and have no shape change, and the fuel provided in the peripheral portion is provided. The tank and the cover can be used as they are, so that many parts can be shared for different specifications of the upper swing body.
[0051]
According to the second aspect of the present invention, since the engine is provided below the driver's seat of the upper revolving structure, both sides of the upper revolving structure are linear in the front-rear direction with respect to the driver's seat, and are substantially U from both sides to the rear. A peripheral portion formed in a letter shape can be realized.
[0052]
According to the third aspect of the present invention, for example, a cab common to another model can be mounted inside the peripheral portion on the upper swing body.
[0053]
According to the fourth aspect of the present invention, for example, a canopy common to different specifications can be attached to the inside of the peripheral portion on the upper swing body.
[Brief description of the drawings]
1A and 1B show an embodiment of a working machine according to the present invention, wherein FIG. 1A is a plan view of a working machine having an upper revolving structure of a first specification dedicated to a canopy, and FIG. 1B is a canopy and a cab. It is a top view of the working machine provided with the upper revolving superstructure of the 2nd specification which is shared.
FIG. 2 is a side view of the work machine in which a canopy and a working device are attached to an upper revolving superstructure of a first specification.
FIG. 3 is a perspective view in which a canopy is attached to an upper revolving superstructure of the first specification of the work machine;
FIG. 4 is a perspective view of the work machine in which a cover of an upper swing body is opened.
FIG. 5 is a side view of the work machine in which a cab and a working device are attached to an upper revolving superstructure of a second specification.
FIG. 6 is a side view of the work machine in which a canopy and a working device are attached to an upper revolving superstructure of a second specification.
FIG. 7 is a perspective view showing a sealing position of a cab with respect to a fuel tank of the work machine.
FIG. 8 is a cross-sectional view showing a state where the cab is attached to a fuel tank of the work machine.
[Explanation of symbols]
11, 11a Hydraulic excavator 12 as working machine Lower traveling body 14 Upper revolving structure 35 Engine 40 Driver seat 51, 56 Cover 64 Fuel tank 75 Peripheral parts 75a, 75b Side part 75c Rear part 78 Canopy 91 Cab

Claims (4)

An undercarriage,
An upper revolving structure having a peripheral portion that is provided to be pivotable with respect to the lower traveling structure, and has a substantially U-shaped peripheral portion with both sides being straight in the front-rear direction and extending from both sides to the rear;
A driver's seat provided inside the peripheral part on the upper revolving unit,
An engine provided in the upper turning body,
A fuel tank provided at a peripheral portion of the upper revolving structure and storing fuel to be supplied to the engine;
A work machine, comprising: a cover provided on a periphery of the upper swing body to open and close the inside of the upper swing body. The work machine according to claim 1, wherein the engine is provided below a driver's seat of the upper revolving unit. The working machine according to claim 1, further comprising a cab mounted on an inside of a peripheral portion on the upper revolving structure. The work machine according to claim 1, further comprising a canopy mounted inside the peripheral portion on the upper rotating body.

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