JP6158629B2 - Small turning work vehicle - Google Patents

Description

  The present invention relates to a small turning work vehicle. More specifically, the present invention relates to a small turning work vehicle in which a swivel is mounted on a pair of left and right crawler type traveling units, and the swivel is capable of small turning within a width between left and right outer edges of both traveling units.

  Conventionally, there exists what was disclosed by patent document 1 as one form of a small turning work vehicle. That is, in Patent Document 1, a swivel base is mounted on a pair of left and right crawler type traveling units, and the swivel base is rotatable within a width (within a small turning radius) between left and right outer edges of both travel units. The excavation part is attached to the front end of the swivel, the operation part is disposed on one front part on the swivel, the tank part is disposed on the other front part on the swivel, and the rear part on the swivel Discloses a small turning work vehicle in which a prime mover is disposed. An air cleaner connected to the engine of the prime mover is disposed on the left side of the prime mover, and the filter element is taken forward from the front end of the air cleaner to enable maintenance such as replacement of the filter element. .

JP-A-9-95975

  In the above-described turning work vehicle, it is desirable to form the prime mover portion on which the air cleaner is disposed as compactly as possible so as to increase the degree of freedom of the location of the prime mover portion (especially the engine) on the turntable. It was.

  Accordingly, the present invention provides a small turning work vehicle in which a prime mover portion is formed as compact as possible, and the degree of freedom of the location of the prime mover portion (especially the engine) on the turntable can be increased. With the goal.

According to the first aspect of the present invention, the swivel base is mounted on the pair of left and right traveling units, and the swivel base is rotatable within the width between the left and right outer edges of both travel units, and is excavated at the front end of the swivel base. A small driving unit is installed at the front of one side of the swivel base, while a tank unit is disposed at the front part of the other side of the swivel base, and a motor unit is disposed at the rear of the swivel base. An air cleaner that is connected to the engine of the prime mover unit in the tank unit, and the tank unit has tanks in the tank case and an air cleaner on the tanks. The tank case includes a lid body that pivotally supports one side end portion so that at least a part of the upper surface of the tank case can be freely opened and closed, and an open lid holding mechanism that holds the lid body in an open state. The air cleaner has an end on one side close to the inner surface of the tank case via the lid opening holding mechanism. Between the position where the filter element cannot be removed from its one end and the position where the one end protrudes from the upper surface opening of the opened tank case and the filter element can be removed from its one end It is characterized in that the posture can be changed with.
The invention described in claim 2 is the invention described in claim 1, characterized in that outside air is sucked into the air cleaner from the front portion of the tank portion.

  In the small turning work vehicle configured as described above, by arranging an air cleaner in communication with the engine of the prime mover unit in the tank unit, the prime mover unit is made compact by the space of the air cleaner conventionally arranged in the prime mover unit. Thus, the degree of freedom of the position of the prime mover on the swivel can be increased. Therefore, for example, by arranging the engine of the prime mover in the lower rear part on the swivel base, the center of gravity position on the swivel base can be arranged as far back and downward as possible to improve the stability of the vehicle body. it can. Moreover, the conveyance efficiency which accommodates and conveys in a container etc. can be improved by reducing the ground height of the canopy standing on a motor | power_engine part.

Further, in the small turning work vehicle configured as described above, the air cleaner is positioned between a position where the filter element cannot be taken out from one end portion thereof and a position where the filter element can be taken out from one end portion thereof. By making it changeable, the air cleaner can be arranged compactly even in a narrow space in the tank portion. In other words, by changing the attitude of the air cleaner only when the filter element is taken out from the air cleaner, the filter element can be easily taken out even from an air cleaner arranged in a narrow space in the tank portion.

Further, in the small turning work vehicle configured as described above, the air cleaner is disposed from the position where one side end is close to the inner surface of the tank case and the upper surface opening of the opened tank case through the lid holding mechanism. The posture can be changed between the position where one side end protrudes, so the posture of the air cleaner can be changed steadily without providing a support member for changing the posture of the air cleaner in a narrow tank case. can do.

The invention of claim 3 is the invention according to claim 1 or 2, wherein the holding stay forming part of lid opening holding mechanism while pivotally supporting the proximal end portion of the posture changing body, the holding stay The tip of the posture changing body is connected to the formed guide hole so that the posture can be freely changed, and an air cleaner is attached to the posture changing body so that the posture of the air cleaner can be changed via the posture changing body.

  In the small turning work vehicle configured as described above, the base end portion is pivotally supported on the holding stay of the opening-holding holding mechanism, and the posture changing body is connected to the guide hole formed in the holding stay so that the tip end portion can be freely changed in posture. By making the posture of the air cleaner changeable, the holding stay can be used effectively, and the posture of the air cleaner housed in the tank case in a dense state can be changed with a simple structure.

  According to the present invention, the prime mover part can be made as compact as possible, and the degree of freedom of the position of the prime mover part (especially the engine) on the swivel can be increased.

The right view of the excavation work vehicle of this embodiment. The left view of the excavation work vehicle of this embodiment. The front view of the excavation work vehicle of this embodiment. The rear view of the excavation work vehicle of this embodiment. The top view of the excavation work vehicle of this embodiment. Explanatory drawing of the right side of the excavation work vehicle of this embodiment. The perspective explanatory view of a tank part. Front explanatory drawing of the accommodation posture of an air cleaner. Front explanatory drawing of the maintenance posture of the air cleaner. The perspective explanatory drawing of the accommodation attitude | position (a) and maintenance attitude | position (b) of an air cleaner. Plane explanatory drawing on a turntable. Explanatory drawing on the left side on a turntable.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 is an excavation work vehicle as a small turning work vehicle according to the present invention.

[Overview of overall excavation work vehicle]
As shown in FIGS. 1 to 5, the excavation work vehicle A includes a traveling vehicle body 1 capable of self-propelling, an excavation unit 2 as a working unit attached to the traveling vehicle body 1, and a soil discharging unit 3. In the present embodiment, the excavating bucket 13 is attached as a working attachment to the tip of the working unit to form the excavating unit 2.

  The traveling vehicle body 1 has a base 5 interposed between a pair of left and right crawler-type traveling parts 4, 4, and a swivel 6 can be swung freely on either side of the vertical axis about the vertical axis. It is installed. The swivel base 6 is substantially circular in plan view and can be swung within a small turning radius of the lateral width of the traveling parts 4, 4 (the distance between the outer edge of the left traveling part 4 and the outer edge of the right traveling part 4). It is formed in a plate shape to enable small turning work. On the swivel base 6, as shown in FIGS. 7 and 8, the driving unit 7 and the tank unit 8 are disposed in the front half, and the prime mover unit 9 is disposed in the rear half. A base end portion of the excavation portion 2 is pivotally attached to a position near one side (in the present embodiment, right side) of the swivel base 6. The earth removal part 3 is attached to the base 5 between the pair of left and right traveling parts 4, 4. Reference numeral 10 denotes a canopy that stands on the prime mover unit 9 and covers the operation unit 7 directly above.

  The excavation unit 2 includes a boom 11, an arm 12, a bucket 13, a swing cylinder 14, a boom cylinder 15, an arm cylinder 16, and a bucket cylinder 17 that rotate them.

  As shown in FIGS. 1 to 6, the earth removal portion 3 can move up and down the base end portions of the pair of left and right blade arms 26, 26 extending in the front-rear direction to the base 5 between the pair of left and right traveling portions 4. A blade (soil removal plate) 27 extending in the left-right direction is installed between the tip portions of the blade arms 26 and 26. The blade 27 is formed to have substantially the same width as the width on the left and right sides of the running parts 4, 4. Reference numeral 28 denotes a blade cylinder.

  With this configuration, the traveling vehicle body 1 is configured to appropriately perform forward / backward straight traveling and left / right turning traveling by operating the traveling unit 4 with the driving unit 7. And the excavation operation | work can be performed by operating the excavation part 2 with the operation part 7. FIG. Further, the earthing work can be performed by operating the earthing unit 3 with the operation unit 7.

[Description of characteristic configuration]
Next, a characteristic configuration of the present embodiment will be described with reference to FIGS. In other words, the operating unit 7 is disposed at one front part on the swivel base 6 (left front part in the present embodiment), while the tank is disposed at the other front part on the swivel base 6 (right front part in the present embodiment). A portion 8 is disposed, and a prime mover portion 9 is disposed at a rear portion on the swivel base 6. An air cleaner 30 communicating with an engine E, which is a main component of the prime mover unit 9, is disposed in the tank unit 8. The tank unit 8 includes a fuel tank 100 and a hydraulic oil tank 101 as tanks disposed in the tank case 40 so as to be adjacent to each other in the front-rear direction. An air cleaner 30 is disposed in a small space. The air cleaner 30 sucks and purifies the outside air and supplies the purified outside air to the engine E.

  As shown in FIGS. 6 and 7, the tank case 40 is formed from a peripheral wall and an upper surface portion that covers the upper surface of the peripheral wall. The peripheral wall is formed by first and second tank cover bodies 76 and 77, a right lower edge peripheral cover body 78, a right front cover body 79, and an inner wall body 102 which will be described later. The upper surface portion is formed by a front upper surface cover body 42, a midway upper surface cover body 41, and a rear upper surface cover body 43 that are disposed adjacent to each other in the front-rear direction. The middle part upper surface cover body 41 pivotally supports one side end part (the rear end edge part in the present embodiment) on the front edge part of the rear upper part cover body 43 so that the middle part of the upper surface part can be freely opened and closed. doing. The midway upper surface cover body 41 as a lid body can be held in an open state by the lid-opening holding mechanism 50. The front upper surface cover body 42 and the midway upper surface cover body 41 are formed in an arcuate shape downward and downward in a side view, and the rear upper surface cover body 43 is formed in a substantially horizontal shape in a side view. Yes. The front upper surface cover body 42 and the rear upper surface cover body 43 are disposed in a fixed state, while the midway upper surface cover body 41 is arranged at the front edge of the rear upper surface cover body 43 via a pivotal support 44 such as a hinge. The end edge is pivotally connected so that it can be freely opened and closed. As shown in FIGS. 8 and 9, the pivotal support body 44 includes a pivotal portion 45 whose axis is directed in the left-right direction, a front coupling piece 46 coupled to the midway upper surface cover body 41, and a rear upper surface cover body 43. And a rear connecting piece 47 connected to each other.

  As shown in FIGS. 8 to 10, the air cleaner 30 includes a main body case 31, a lid body 32, and an attachment piece 34. The main body case 31 is formed in a cylindrical shape extending leftward and rightward (facing the axis) and having a left end wall. The lid body 32 is formed in a circular cap shape that freely closes and opens the right opening end surface of the main body case 31, and is detachably attached to the right opening end portion of the main body case 31 via a detachable tool 33 such as a patchon lock. It is attached. The attachment piece 34 is formed in a vertically long shape and provided on the peripheral wall of the main body case 31. The main body case 31 accommodates a cylindrical filter element 35 (longitudinal shape) that extends in the left-right direction, which is the take-out / take-in direction, and removes the lid 32 via the attachment / detachment tool 33, thereby removing the main body case. The filter element 35 can be taken out from the right end of 31 to the right.

A base end portion (rear end portion) of the upstream side intake pipe 36 is connected to the left front portion of the peripheral wall of the main body case 31, and the upstream side intake pipe 36 has its tip at a position directly above the fuel tank 100 . In addition to extending downward on the left side, it extends downward along the left side wall of the fuel tank 100 to open the tip opening 36a downward. Then, fresh outside air flowing into the tank case 40 from the front of the vehicle body can be sucked from the tip opening 36a. The front end portion (front end portion) of the downstream side intake pipe 37 is connected to the left end wall of the main body case 31, and the midway portion is extended rearward and downward to connect the downstream side intake pipe 37 to the intake port portion 38 of the engine E. The base end (rear end) is connected.

  The air cleaner 30 pivotally supports the base end portion of the posture changing body 54 on a front holding stay 51 to be described later, which forms a part of the lid opening holding mechanism 50, and has a posture in a guide hole 51 e formed in the front holding stay 51. The tip of the change body 54 is connected so that the posture can be freely changed, and the air cleaner 30 is attached to the posture change body 54 via an attachment piece 34. The air cleaner 30 can be changed in posture through the posture changing body 54.

  That is, the air cleaner 30 has a position where one side end portion (right end portion in this embodiment) faces the inner surface of the side wall of the tank case 40 (first tank cover body 76 in this embodiment) and a midway portion. The lid 32 at the right end protrudes from the top opening of the tank case 40 with the top cover 41 opened, and when the lid 32 is removed from the body case 31, the right opening end of the body case 31 is located on the upper right side. It is possible to change the posture between the position opening toward the front. In other words, the air cleaner 30 has a position where the side wall of the tank case 40 is obstructed and the filter element 35 cannot be taken out / taken in from the right end of the main body case 31 (horizontal posture shown in FIG. 8), and the side wall of the tank case 40. The position of the filter element 35 can be changed between the position where the filter element 35 can be taken out and taken in from the end of the right opening of the main body case 31 beyond the upper edge (the inclined position shown in FIG. 9).

As shown in FIGS. 7 to 10, the open lid holding mechanism 50 includes a front holding stay 51, a rear holding stay 52, and a holding stand 53. The front holding stay 51 is formed in a plate shape extending in the left-right direction and attached to the right rear portion of the ceiling surface portion of the hydraulic oil tank, and a plate formed by raising upward from the attachment piece 51a The main piece 51b and a connecting piece 51c formed to protrude rearward from the upper end edge of the main piece 51b. This piece 51b, while forming a pivot hole 51d in the left lower part, and forms a guide hole 51e of along the Hare circle arc to a virtual arc line around the pivot hole 51d in the upper right. On the front side of the main piece 51b, a plate-like posture changing body 54 formed in a substantially Z shape in front view is arranged in the front-rear superposition state, and the left end of the posture changing body 54 is placed in the front-rear direction in the pivot hole 51d. It is pivotally supported via a pivot pin 55 with its axis directed. The guide hole 51e is inserted with a slide pin 56 projecting rearward from the right end portion of the posture changing body 54 so that the slide pin 56 is slidable along the guide hole 51e. A fastening fixture 57 is attached to the rear end of the pin 56. Then, the tightening fixture 57 is loosened, the posture of the posture changing body 54 is changed by sliding the sliding pin 56 along the guide hole 51e, and the tightening fixture 57 is tightened at the posture changing position. The posture change body 54 can be held at the posture change position. That is, the attitude of the air cleaner 30 attached to the attitude changing body 54 can be arbitrarily changed within the guide range of the guide hole 51e. In the present embodiment, when the slide pin 56 is arranged at the lower edge of the guide hole 51e and the posture changing body 54 is fastened and fixed, the air cleaner 30 takes a substantially horizontal posture in which the filter element 35 cannot be taken out and taken in. Further, when the slide pin 56 is arranged at the upper edge of the guide hole 51e and the posture changing body 54 is fastened and fixed, the air cleaner 30 takes an inclined posture in which the filter element 35 can be taken out and taken in. ing.

  The rear holding stay 52 is formed in a rectangular plate shape, and connects the front end edge to the connecting piece 51 c of the front holding stay 51, while the rear end edge projects upward from the front end edge of the rear upper surface cover body 43. Connected. A support protrusion 52 a that supports the lower end of the holding stand 53 is provided on the left rear portion of the rear holding stay 52.

  The holding stand 53 is formed in a straight rod shape extending in the front-rear direction (longitudinal front-rear shape), and a lower end portion 53a is pivotally supported on the support protrusion 52a so as to be swingable about a horizontal axis. The front connection piece 46 connected to the midway upper surface cover body 41 is provided with a guide piece 46a extending in the front-rear direction, and the guide piece 46a is provided with a guide long hole 46b extending in the front-rear direction. An engaging recess 46c is provided at the rear end of the hole 46b. An upper end portion 53b of the holding stand 53 is slidably engaged with the guide slot 46b. When the midway upper surface cover body 41 is manually opened, the upper end 53b of the holding stand 53 slides toward the rear end along the guide long hole 46b and engages with the engaging recess 46c. The opening operation is restricted. For example, the opening angle of the midway upper surface cover body 41 from the closing position to the maximum opening position can be set to 70 degrees. At this time, even if the middle portion upper surface cover body 41 is released, the upper end portion 53b of the holding stand 53 is engaged with the engagement recess 46c, so that the middle portion upper surface cover body 41 is held in the open state. . Therefore, work such as maintenance of the air cleaner 30 can be easily performed by holding the midway upper surface cover body 41 in the open state. When closing the mid-section upper surface cover body 41, the engagement state between the engagement recess 46c and the upper end portion 53b of the holding stand 53 is released, so that the upper end portion 53b of the holding stand 53 is inserted into the guide slot 46b. The upper surface cover body 41 can be closed while being slid along the front end side.

  As shown in FIGS. 6 and 8, the midway upper surface cover body 41 has a front end edge portion 41a disposed slightly forward of the rear end edge portion 42a of the front upper surface cover body 42, and the lower surface of the front end edge portion 41a. And a cue space 48 is formed between the upper end of the rear edge 42a. The clue space 48 is a space that serves as a clue that an operator or other operator can easily open the midway upper surface cover body 41 by inserting a finger. At this time, the clue space 48 can be secured by forming the upper surface of the rear end edge portion 42a of the front upper surface cover body 42 in a moderately concave shape. Further, since the upper surface of the midway upper surface cover body 41 is a downward curved surface, it is possible to prevent rainwater and car wash water from entering from the clue space 48. 7-9, 41b is a key hole, 41c is a lock mechanism, 41d is an engagement / release operation lever, and 41e is an engagement / release mechanism.

  In the excavation work vehicle A configured as described above, the air cleaner 30 that is connected to the engine E of the prime mover unit 9 is disposed in the tank unit 8, so that the air cleaner 30 that has been conventionally arranged in the prime mover unit 9 is provided. The prime mover unit 9 can be made compact by the amount of space, and the degree of freedom of the location of the prime mover unit 9 on the swivel base 6 can be increased. Therefore, for example, the engine E of the prime mover unit 9 is disposed in the lower rear part on the swivel base 6, and the center of gravity position on the swivel base 6 is disposed as far back and downward as possible to improve the stability of the vehicle body. Can be improved. Moreover, the conveyance efficiency which accommodates and conveys in a container etc. can be improved by reducing the ground height of the canopy 10 standingly arranged on the motor | power_engine part 9. FIG.

  The air cleaner 30 disposed in the tank portion 8 is positioned between a position where the filter element 35 cannot be taken out / taken in from the right end and a position where the filter element 35 can be taken out / taken in from the right end. By making the change possible, the air cleaner 30 can be arranged in a dense state even in a narrow space in the tank case 40. That is, when the filter element 35 is taken out or taken in from the air cleaner 30, the filter element 35 is changed from the air cleaner 30 arranged in a narrow space in the tank case 40 by changing the attitude of the air cleaner 30. Can be easily taken out or taken in.

  Specifically, the air cleaner 30 can be disposed in a narrow tank case 40 with the right end thereof being close to the inner surface of the first tank cover body 76 that is a side wall in the horizontal posture shown in FIG. Then, when taking out the cylindrical filter element 35 that is long in the left and right directions in the air cleaner 30 from the inside of the air cleaner 30 and replacing it with a new one, the air cleaner 30 is brought into the inclined posture (maintenance posture) shown in FIG. By changing the posture and removing the lid 32 from the main body case 31 outside the tank case 40, the filter element 35 can be easily taken out from the right opening end of the main body case 31 beyond the upper edge of the first tank cover body 76. Can do. After that, after assembling the air cleaner 30 by housing a new filter element 35 in the main body case 31 and closing the lid with the lid 32, the air cleaner 30 is restored to the horizontal posture shown in FIG. be able to.

  At this time, the air cleaner 30 is connected to the inner surface of the tank case 40 (in this embodiment, the inner surface of a first tank cover body 76 described later) via the open-holding holding mechanism 50 (in this embodiment, the side of the air cleaner 30). The position where the lid body 32) which forms the right end portion faces closely and the position where the one side end portion projects upward from the upper surface opening of the tank case 40 where the midway upper surface cover body 41 is opened. Since the posture can be changed between the air cleaners 30, the posture of the air cleaner 30 can be changed steadily without providing a support member for changing the posture of the air cleaner 30 separately in the narrow tank case 40.

  In other words, the base end portion of the posture changing body 54 is pivotally supported on the main piece 51b of the front holding stay 51 that forms a part of the lid holding mechanism 50, and the posture changing body is inserted into the guide hole 51e formed in the main piece 51b. The front end portion of 54 is connected so that the posture can be freely changed. Then, by effectively using the main piece 51b of the front holding stay 51, the posture of the air cleaner 30 can be changed to the main piece 51b via the posture changing body 54, so that the air cleaner 30 is housed in the tank case 40 in a dense state. The attitude of the air cleaner 30 can be steadily changed with a simple structure.

  Next, the structure of the turntable 6, the operation part 7, the tank part 8, and the prime mover part 9 will be described more specifically.

[Description of swivel]
As shown in FIGS. 11 and 12, the swivel base 6 has a floor plate piece 62 disposed above a substantially front half portion of a bottom plate piece 60 formed in a substantially disk shape in plan view via a spacing machine frame 61. A flat housing space 63 having a constant interval is formed between the bottom plate piece 60 and the floor plate piece 62.

  As shown in FIGS. 1 to 4, a lamp cover body 70 and a control bulb cover body 71 are sequentially formed on the circumferential surface of the swivel base 6 in a counterclockwise direction in plan view from the left side of the base end portion of the excavation unit 2. , An operation pattern switching valve cover body 72, a tool storage portion cover body 73, a left lower edge peripheral cover body 74, a counterweight 75, first and second tank cover bodies 76 and 77, a right lower peripheral edge cover body 78, and The right front cover body 79 is attached to form a peripheral wall that closes the peripheral surface of the swivel base 6. Control valve cover body 71, operation pattern switching valve cover body 72, tool and the like storage section cover body 73, left lower end peripheral edge cover body 74, first and second tank cover bodies 76 and 77, and right lower end peripheral edge cover body 78 is curved along the peripheral edge of the swivel base 6 so as to be curved in an arc shape in plan view.

[Description of operation unit]
As shown in FIGS. 1 to 3, the operation unit 7 arranges the front wall of the seat support base (seat mount) 81 at the rear end edge of the floor plate piece 62, and seats 80 in the center on the seat support base 81. Is placed. A left lever support case 82 is disposed on the left side of the seat 80 on the seat support base 81, while a right lever support case 83 is disposed on the right side of the seat 80. A left pilot valve (not shown) is disposed in the left lever support case 82, and a left working part operation lever 84 is projected upward from the front upper part of the left lever support case 82. Can be tilted in the front-rear direction and the left-right direction. A right pilot valve (not shown) is provided in the right lever support case 83, a right working part operation lever 85 is projected upward from the front upper part of the right lever support case 83, and the right working part operation lever 85 is provided. Can be tilted in the front-rear direction and the left-right direction.

  Immediately before the seat 80, left and right traveling levers 86, 87 extending up and down through a lever hole formed in the front center portion of the floor plate piece 62 are erected, and each traveling lever 86, 87 extends in the front-rear direction. The traveling units 4 and 4 can be operated for tilting operation.

  On the right side of the right lever support case 83, there is disposed an operation panel 90 adjacent to each other so that the front and rear are long and the left and right are short. A liquid crystal monitor 91 is provided in front of the upper surface of the operation panel 90, and a blade lever 92 is protruded from the middle so as to be tiltable in the front-rear direction, and various switch groups (not shown) are disposed at the rear. . The blade lever 92 is hydraulically connected to the blade lever 92 via a blade cylinder control valve (not shown), and the expansion and contraction operation of the blade cylinder 28 is linked to the tilting operation of the blade lever 92 in the front-rear direction. Thus, the soil removal unit 3 can be moved up and down.

[Description of tank part]
As shown in FIGS. 11 and 12, the tank unit 8 includes a fuel tank 100 that stores fuel for driving the engine E, and a hydraulic oil tank 101 that stores hydraulic oil adjacent to each other in the front-rear direction. Yes. These tanks 100, 101 are erected on the right front cover body 79, first and second tank cover bodies 76, 77 disposed on the right peripheral edge of the floor board piece 62, and on the right inner side of the floor board piece 62. The inner wall body 102, the right front cover body 79, the first and second tank cover bodies 76 and 77, the front upper surface cover body 42 disposed on the upper edge of the inner wall body 102, and the midway upper surface cover. It is blocked by the body 41. In the present embodiment, as described above, the air cleaner 30 is placed on the hydraulic oil tank 101 in a horizontal shape, and the air cleaner 30 is closed by the midway upper surface cover body 41 so as to be freely openable and closable.

[Description of prime mover]
As shown in FIGS. 11 and 12, the prime mover unit 9 includes an engine E arranged with its axis lined in the left-right direction, a hydraulic pump (not shown) for pumping hydraulic oil to the hydraulic operation unit, and an engine E A radiator 110 and the like for cooling are integrally connected. 68 the left cover member which covers the left side of the engine E, 69 is a bonnet that covers the back of the engine E. In the present embodiment, since the air cleaner 30 is moved from the prime mover 9 to the tank 8, the engine E is moved as much as possible by the space for the air cleaner 30, and at least the bottom plate on the swivel base 6. The ring-shaped slewing bearing 111 provided on the lower surface of the piece 60 is disposed rearward. And the support plate 113,114 formed in the block shape extended in the left-right direction is arrange | positioned in the rear part of the baseplate piece 60, and while arrange | positioning the oil pan 112 in both the support tables 113,114 in both the state, The engine E is mounted on the support bases 113 and 114 through an engine mount (not shown). An opening (not shown) is formed at a location of the bottom plate piece 60 that coincides with the oil pan 112, and the oil pan 112 is disposed close to the opening, thereby reducing the ground clearance of the engine E. By arranging the engine E in this way, the position of the center of gravity on the swivel base 6 can be changed to the rear lower side as much as possible, and the stability of the traveling vehicle body 1 can be improved. And the ground clearance to the ceiling surface of the canopy 10 currently standing on the motor | power_engine part 9 can be reduced by reducing the ground clearance of the engine E. FIG. Therefore, the excavation work vehicle A can be easily accommodated in a container or the like, and the transportability can be improved. Reference numeral 116 denotes a swing motor, 117 a clutch housing, and 118 an exhaust gas purification device.

A excavation work vehicle 7 operation part 8 tank part 9 prime mover part 30 air cleaner 35 filter element 40 tank case 41 middle part upper surface cover body 50 lid opening holding mechanism

Claims (3)

A swivel is mounted on a pair of left and right traveling parts, and the swivel is rotatable within the width between the left and right outer edges of both traveling parts, and an excavation part is attached to the front end of the swivel, A small turning work vehicle in which a driving part is provided on one side front part, a tank part is provided on the other side front part on the turntable, and a prime mover part is provided on the rear part on the turntable,
An air cleaner connected to the engine of the prime mover unit is arranged in the tank unit,
The tank part has tanks in the tank case, an air cleaner on the tanks,
The tank case includes a lid body that pivotally supports one side end portion so that at least a part of the upper surface of the tank case can be freely opened and closed, and an open lid holding mechanism that holds the lid body in an open state. ,
The air cleaner has a position where one side end is close to the inner surface of the tank case through the lid holding mechanism and the filter element cannot be taken out from the one side end, and the upper surface opening of the opened tank case. A small turning work vehicle characterized in that a posture can be changed between a position where one side end portion protrudes from a position where the filter element can be taken out from the one side end portion . 2. The small turning work vehicle according to claim 1, wherein outside air is sucked into the air cleaner from a front portion of the tank portion . The base end of the posture changing body is pivotally supported by a holding stay that forms a part of the opening and holding mechanism, and the distal end of the posture changing body is connected to a guide hole formed in the holding stay so that the posture can be freely changed. 3. The small turning work vehicle according to claim 1, wherein an air cleaner is attached to the body, and the posture of the air cleaner can be changed via the posture changing body.

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