JP3897895B2 - Ultra-small turning work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ultra-small turning work vehicle, and relates to an ultra-small turning work vehicle configured to improve work efficiency.
[0002]
[Prior art]
In a conventional ultra-swivel work vehicle, a muffler and an exhaust pipe for exhausting the exhaust from the muffler to the outside are arranged in the bonnet, and the exhaust is located rearward from a low position such as a swivel base located below the bonnet. It was configured to be discharged .
[0003]
[Problems to be solved by the invention]
However, as described above, when exhaust is exhausted backward from a low position such as a swivel base, exhaust is applied to an operator who is working near the ultra-small turning work vehicle in the exhaust discharge direction, which is uncomfortable. The work efficiency is lowered due to the feeling or the field of view being obstructed, and exhaust is sometimes applied to the plants near the ultra-small turning work vehicle .
[0004]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0005]
A swivel base (4) attached to the upper part of the traveling device so as to be turnable, a first boom (10) attached to the turntable (4) so as to be rotatable up and down, and a tip of the first boom (10) A second boom (11) attached to the second boom (11) so as to be rotatable in the left-right direction, a third boom (12) attached to the second boom (11) so as to be rotatable in the left-right direction, and the third boom (12 ) And a work attachment attached to the tip of the arm (13) so as to be able to turn up and down. The second boom (11) In an ultra-small turning work vehicle configured to be capable of offsetting the work attachment in the left-right direction by turning in the left-right direction, the muffler (18) is disposed outside the hood (21) and exhausted from the muffler (18). Exhaust pipe ( The tip of 6) is extended to above the canopy (15) that covers the upper side of the driver's seat (6), and the column (15a) that supports the canopy (15) is formed in a substantially U shape in plan view. The exhaust pipe (16) is disposed along the support post (15a) and is housed in a space formed in the support post (15a). What is the support pipe (15a) of the exhaust pipe (16)? An exhaust pipe cover (22) is arranged on the opposite side, and the exhaust pipe (16), the support post (15a), and the exhaust pipe cover (22) are connected and fixed while securing a certain space by the bracket (16b). It is a thing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0007]
1 is a side view showing an ultra-small turning work vehicle of the present invention, FIG. 2 is also a front view, FIG. 3 is a rear view, FIG. 4 is a plan view, and FIG. 5 is arranged along a canopy column. It is a side view which shows an exhaust pipe.
[0008]
6 is a plan view, FIG. 7 is a front view showing a light attached to the canopy, FIG. 8 is a side view, and FIG. 9 is a view showing a light irradiation state at the time of side ditching in front of the driver's seat.
[0009]
The configuration of the ultra-small turning work vehicle of the present invention will be described.
1 to 4, a swivel base 4 is attached to an upper part of a traveling apparatus 1 equipped with a pair of left and right crawler traveling apparatuses 2, and a driver's seat 6 is disposed on one side of the upper part of the swivel base 4. A canopy 15 is disposed above the driver seat 6. The driver 6, the canopy 15, the operation lever 7, and the like constitute the driver 9, and the backhoe device 5 is disposed on the side of the driver 9. A fuel tank 62 is disposed in front of the operation unit 9, and a fuel filler port 62 a of the fuel tank 62 is disposed above the fuel tank 62. The traveling device 1 is equipped with, for example, a rear end plate 3 at the rear end.
[0010]
A light 23 is provided at the front end of the canopy 15 to illuminate the work space when working at night or in a dark place. The light 23 is attached so that the irradiation direction can be adjusted up, down, left, and right. ing. The light 23 is attached to a ceiling surface 15b which is the lower surface of the canopy 15. The ceiling surface 15b of the canopy 15 is formed such that the light attachment portion 15c is positioned higher than the other portions, and the light 23 is attached to the ceiling surface. It is made not to protrude much lower than 15b.
Further, the ultra-small turning type work vehicle is configured so that the entire backhoe device 5 can be stored within the turning diameter of the turntable 4 in the ultra-small turning storage state, and the bucket 14 and the operating unit 9 do not interfere with each other. It is configured.
[0011]
The fuel tank 62 is installed in the swivel 4 in front of the operation unit 9, and a fuel filler port 62 a is disposed above the fuel tank 62. The oil supply port 62a protrudes to the outside and opens substantially upward. The vertical height of the fuel filler opening 62a is, for example, at a low position that is substantially the same height as the lower half of the auxiliary arm 25 that the operator grips when getting on and off to assist getting on and off the driver's seat 6. It is set so that when refueling, the worker can refuel in a stable state standing on the ground. By arranging the refueling port 62a at such a low position, the worker can reliably refuel on the ground while standing on the ground, and a refueling tank in which the fuel oil has entered before refueling or during refueling Can be once placed on the step of the operation section, so that the workability at the time of refueling can be improved.
In addition, since the fuel filler opening 62a is opened substantially upward, it is possible to reliably supply the fuel oil to be supplied without spilling the fuel oil without using a dedicated fueling tool, thereby improving workability. .
[0012]
The backhoe device 5 includes a first boom 10 that is attached to the swivel 4 so as to be rotatable up and down, a second boom 11 that is attached to the distal end portion of the first boom 10 so as to be rotatable in the left-right direction, and the second boom 11. A third boom 12 attached to the boom 11 so as to be pivotable in the left-right direction, an arm 13 attached to the third boom 12 so as to be pivotable in the vertical direction, and a work attached to the tip of the arm 13 The bucket 14 is an attachment, and the arm 13 and the bucket 14 are configured to be offset in the left-right direction by rotating the second boom 11 in the left-right direction.
[0013]
A boom cylinder 29 is interposed between the first boom 10 and the swivel 4, and the first boom 10 can be turned up and down by expansion and contraction of the boom cylinder 29. An arm cylinder 17 is interposed between the arm 13 and the arm 13 so that the arm 13 can be turned up and down by expansion and contraction. A bucket cylinder 48 is interposed between the arm 13 and the bucket 14 so that the bucket cylinder 48 The bucket 48 can be turned up and down by expansion and contraction. A trajectory 66 in FIG. 1 is a trajectory through which the tip of the bucket 14 passes as the boom cylinder 29, the arm cylinder 17, the bucket cylinder 48, and the like extend and contract. And so as not to interfere with each other.
[0014]
The second boom 11 is connected at its lower end to the upper end of the first boom 10 so as to be rotatable left and right, and the upper end of the second boom 11 is connected to the third boom 12 so as to be rotatable left and right. An offset cylinder 31 is interposed between the second boom 11 and the first boom 10.
Further, a connecting rod 30 is installed between the first boom 10 and the third boom 12, and both ends of the connecting rod 30 are pivotally attached to the first boom 10 and the third boom 12, respectively. The rod 30, the first boom 10, the second boom 11, and the third boom 12 constitute a parallel quadruple link mechanism.
And by extending and contracting the offset cylinder 31, the bucket 14 is eccentric with respect to the first boom 10 and offset in the left-right direction. In this case, the first boom in front view or rear view is viewed by the parallel quadruple link mechanism. 10 and the third boom 12, the arm 13, and the bucket 14 are not changed in angle, and are offset while maintaining a parallel state.
[0015]
Further, as shown in FIG. 3, an engine 26 is disposed in the hood 21 at the rear of the operating unit 9, and a muffler 18 is disposed outside the hood 21 above the engine 26, and the muffler 18 is attached to the muffler. Covered with a cover 18a.
An exhaust pipe 16 for exhausting the exhaust from the muffler 18 is erected upward from the muffler 18, and the tail pipe 16 a at the tip of the exhaust pipe 16 is located above the upper surface of the canopy 15. It is extended to.
[0016]
The exhaust pipe 16 is disposed along a column 15 a that supports the canopy 15, and the outer periphery of the exhaust pipe 16 is covered with the column 15 a and the exhaust pipe cover 22. As shown in FIGS. 5 and 6, the support column 15 a is formed in a substantially U shape that is open in the arrangement direction of the exhaust pipe 16 in a plan view, and is exhausted into a space formed by the three side surfaces of the support column 15 a. The tube 16 is accommodated. An exhaust pipe cover 22 is provided on the opposite side of the exhaust pipe 16 from the side where the support column 15a is provided to cover the exhaust pipe 16. The exhaust pipe 16, the support 15a covering the outer periphery of the exhaust pipe 16, and the exhaust pipe cover 22 are connected and fixed by brackets 16b and 16b while securing a certain space, and the heat of the exhaust pipe 16 is heated by the support 15a. The exhaust pipe cover 22 is not directly transmitted.
[0017]
The tail tube 16a attached to the distal end portion of the exhaust pipe 16 is opened to substantially the side or the substantially upper side, and is configured such that the exhaust is discharged toward the substantially side or the substantially upper side. . Further, the tail tube 16a is attached so as to be rotatable in the horizontal direction so that the exhaust direction of the exhaust gas can be appropriately changed in accordance with the surrounding environment.
[0018]
In this way, by arranging the muffler 18 outside the bonnet 21, it is possible to prevent cooling air such as a radiator and an oil cooler built in the bonnet 21 from being heated by the heat of the muffler 18. The effect can be improved.
Further, since the tail pipe 16a of the exhaust pipe 16 is disposed above the upper surface of the canopy 15, the exhaust is not applied to a worker who is working around the ultra-small turning work vehicle, and the worker is comfortable. Thus, the work efficiency can be improved. In addition, since it is possible to prevent exhaust air from being applied to passersby and vegetation around the work machine, it does not make passersby uncomfortable or damage vegetation.
Then, the column 15a of the canopy 15 is formed in a substantially U shape in a plan view, and the exhaust pipe 16 is disposed along the column 15a and is housed in a space formed in the column 15a. The space occupied by the arrangement of the pipe 16 can be reduced, and the exhaust pipe 16 can prevent the operator's field of view working in the operation unit 9 from being obstructed, thereby improving workability and safety. . In addition, since a part of the exhaust pipe cover 22 covering the outer peripheral portion of the exhaust pipe 16 is substituted by the support column 15a, the weight of the machine body and the cost can be reduced.
[0019]
As described above, the light 23 shown in FIGS. 1 and 2 is attached to the front end portion of the canopy 15 so that the work space is easily illuminated when working at night or in a dark place. As shown in FIGS. 7 and 8, the light 23 is attached to a mounting portion 15c of the ceiling surface 15b of the canopy 15, and the mounting portion 15c is formed to be positioned higher than the other ceiling surface 15b. Has been.
The light 23 is attached to the attachment portion 15c via the light bracket 24. The light 23 is attached to the light bracket 24 so as to be vertically rotatable by bolts 25 and 25, and the light bracket 24 is bolted to the attachment portion 15c. 26 is attached so as to be rotatable left and right. As a result, the light 23 is attached to the attachment portion 15c so as to be rotatable in the vertical and horizontal directions, and the irradiation direction of the light 23 can be adjusted in the vertical and horizontal directions.
[0020]
Thus, by attaching the light 23 to the front end of the canopy 15 located above the driver's seat 6, the work space can be illuminated when working at night or in a dark place, as shown in FIG. Even when the side ditching operation in front of the driver's seat 6 is performed, the bottom of the groove can be illuminated by the light 23, and the working efficiency of the side ditching operation can be improved.
Further, since the ceiling surface 15b of the canopy 15 is formed so that the mounting portion 15c of the light 23 is positioned higher than the other portions, the light 23 does not protrude so much lower than the ceiling surface 15b. It is possible to secure a wide space near the person's head, and to prevent the light 23 from colliding with the operator's head even when getting on and off.
Furthermore, since the light 23 is configured so that the irradiation direction can be adjusted up, down, left, and right, the irradiation direction can be appropriately changed according to the direction of the work space in which the work is performed, and it is possible to cope with any work.
Further, since the light 23 is attached to the canopy 15 disposed at a high position, the work space can be irradiated over a wide range.
[0021]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
A swivel base (4) attached to the upper part of the traveling device so as to be turnable, a first boom (10) attached to the turntable (4) so as to be rotatable up and down, and a tip of the first boom (10) A second boom (11) attached to the second boom (11) so as to be rotatable in the left-right direction, a third boom (12) attached to the second boom (11) so as to be rotatable in the left-right direction, and the third boom (12 ) And a work attachment attached to the tip of the arm (13) so as to be able to turn up and down. The second boom (11) In an ultra-small turning work vehicle configured to be capable of offsetting the work attachment in the left-right direction by turning in the left-right direction, the muffler (18) is disposed outside the bonnet (21) and exhausted from the muffler (18). Exhaust pipe ( The tip of 6) is extended to above the canopy (15) that covers the upper side of the driver's seat (6), and the column (15a) that supports the canopy (15) is formed in a substantially U shape in plan view. The exhaust pipe (16) is disposed along the support post (15a) and is housed in a space formed in the support post (15a). What is the support pipe (15a) of the exhaust pipe (16)? An exhaust pipe cover (22) is arranged on the opposite side, and the exhaust pipe (16), the support post (15a), and the exhaust pipe cover (22) are connected and fixed while securing a certain space by the bracket (16b). since the cooling air, such as a radiator and an oil cooler that is built into the bonnet can prevented from being heated by the muffler heat, it was possible to improve the cooling effect by the cooling air.
Further, the exhaust is not applied to a worker who is working around the ultra-small turning work vehicle, and the worker can work comfortably and improve work efficiency, and the work machine Since it is possible to prevent exhausting the surrounding passersby and vegetation, it is no longer unpleasant to passersby or damage the vegetation.
[0022]
Furthermore, a support column that supports the canopy that covers the upper part of the driving unit is formed in a substantially U shape in plan view, and an exhaust pipe that discharges exhaust from the muffler is disposed along the support column and formed in the support column. The space occupied by the exhaust pipe can be reduced, and the exhaust pipe can prevent the operator's view of the operator working in the operating section from being obstructed. It was possible to improve.
In addition, since a part of the exhaust pipe cover that covers the outer peripheral portion of the exhaust pipe is replaced with a support, the weight of the airframe can be reduced and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing an ultra-small turning work vehicle of the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is also a rear view.
FIG. 4 is also a plane.
FIG. 5 is a side view showing an exhaust pipe disposed along a canopy column.
FIG. 6 is also a plan view.
FIG. 7 is a front view showing a light attached to a canopy.
FIG. 8 is a side view of the same.
FIG. 9 is a view showing a light irradiation state at the time of a side ditching operation in front of a driver seat.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 5 Working machine 6 Driver's seat 9 Driving part 15 Canopy 15a Prop 15b Ceiling 15c Mounting part 16 Exhaust pipe 16a Tail pipe 18 Muffler 21 Bonnet 22 Exhaust pipe cover 23 Light 62 Fuel tank 62a Refueling port

Claims (1)

A swivel base that is pivotably attached to the upper part of the traveling device, a first boom that is pivotably mounted on the swivel base, and a second boom that is pivotally attached to the distal end of the first boom. A boom, a third boom attached to the second boom so as to be able to turn in the left-right direction, an arm attached to the third boom so as to be able to turn in the up-down direction, and an arm that can be turned up and down at the tip of the arm An ultra-small turning work vehicle configured to be capable of offsetting the work attachment in the left-right direction by turning the second boom in the left-right direction,
A muffler is disposed outside the bonnet, and the tip of the exhaust pipe that discharges exhaust from the muffler extends to a position higher than the canopy that covers the upper side of the driver's seat, and the column that supports the canopy is omitted in plan view. An exhaust pipe that is formed in a U-shape and is disposed along the column, and is stored in a space formed in the column, and an exhaust pipe cover is disposed on the opposite side of the column from the exhaust pipe. A micro-swivel work vehicle comprising: an exhaust pipe, a support column, and an exhaust pipe cover that are connected and fixed with a bracket while securing a certain space .

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