JP2006266040A - Turning working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce influence of exhaust gas on a plant low in the height, and to prevent rainwater from entering the inside of a hood. <P>SOLUTION: The hood for covering the engine is openably-closably arranged in the rear of an operation seat on a revolving base. An exhaust pipe connected to a muffler of the engine is projected upward by penetrating through a rear upper part of the hood. A cover for covering the upper end of this exhaust pipe and covering a through-hole of the hood from above, is arranged on the hood. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a turning work machine.

As a conventional swivel work machine, a driver's seat is arranged on the left and right sides of the swivel, an engine is arranged behind the driver's seat, this engine is covered with an openable / closable bonnet, and inside the hood, on the side of the engine There exists what arrange | positioned the muffler (for example, patent document 1).
In such a turning work machine, the exhaust pipe connected to the muffler is usually extended to the lower rear side of the bonnet so that the exhaust gas is discharged from the lower rear side of the bonnet to the outside of the bonnet.
JP 11-269929 A

In conventional swivel work machines, exhaust gas is exhausted to the outside from the lower rear of the bonnet, so the exhaust gas discharged to small plants (plants and vegetation) is sprayed directly, and the exhaust gas Plants were sometimes damaged or withered.
Here, it is conceivable to raise the exhaust pipe upward. However, in such a case, there is a problem that rainwater or the like enters the exhaust pipe (in the bonnet).
Therefore, in view of the above problems, the present invention reduces the influence of exhaust gas on a short plant by allowing the exhaust pipe to protrude upward through the rear upper part of the bonnet and covering the exhaust pipe with a cover. It is another object of the present invention to provide a turning work machine that prevents rainwater and the like from entering the bonnet.

In order to achieve the above object, the present invention takes the following technical means. That is, a bonnet that covers the engine is arranged to be openable and closable behind the driver's seat on the swivel, and an exhaust pipe connected to the muffler of the engine protrudes upward through the rear upper part of the bonnet. A cover that covers the upper end and covers the through-hole through which the exhaust pipe passes from above is arranged on the bonnet.
According to this, since exhaust gas can be discharged above the hood, it is possible to prevent the exhaust gas from being directly sprayed onto a short plant (for example, a plant or a plant) and to cover the exhaust pipe and the through hole. Since it is covered with, rainwater can be prevented from entering the bonnet.

The cover is formed with a wind passage for radiating the wind from the bonnet outward through the through hole, and a divergence opening for opening the wind outwardly at the end of the wind passage. In the point.
According to this, the exhaust gas exhausted from the exhaust pipe can be efficiently exhausted to the outside and dispersed by using the wind that passes from the inside of the hood to the outside.
The cover is provided such that the angle of the cover can be changed with respect to the bonnet so as to change the diffusion port from the rear side to the side.

  According to this, for example, the exhaust gas discharge direction can be changed from backward to lateral, the exhaust gas is easily dispersed to reach the plant located at the rear of the bonnet, and the exhaust gas is directly applied to the plant. Can be prevented.

  It reduces the effects of exhaust gas on short plants and prevents rainwater from entering the hood.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 4 and 5, the turning work machine (backhoe) 1 includes a lower traveling device 2 and an upper turning body 3.
The traveling device 2 includes a pair of left and right traveling bodies 4 each having a rubber cover, and a crawler traveling device in which both traveling bodies 4 are driven by a traveling motor M is employed. Further, a dozer 5 is provided at the front portion of the traveling device 2.
The swivel body 3 includes a swivel base 12 supported on the traveling device 2 via a swivel bearing 11 so as to be capable of swiveling left and right around a swivel axis X in the vertical direction, and a working device ( Drilling device) 13. On the swivel base 12, a cabin 14 forming an operator cab is mounted.

The working device 13 includes a swing bracket 17 supported on a support bracket 16 provided at the front portion of the swivel base 12 so as to be offset slightly to the right from the central portion in the left-right direction, and swingable to the left and right around the vertical axis. The boom 18 is pivotally attached to the swing bracket 17 so that the base side is pivotable about a left-right axis, and is supported so as to be swingable up and down, and on the distal end side of the boom 18 about the left-right axis. The arm 19 is pivotally mounted and supported so as to be able to swing back and forth, and a bucket 20 is provided on the distal end side of the arm 19 so as to be capable of squeezing and dumping.
The swing bracket 17 is swung by expansion and contraction of a swing cylinder provided in the swivel base 12, and the boom 18 is swung by expansion and contraction of a boom cylinder 22 interposed between the boom 18 and the swing bracket 17. The arm 19 is swung by the expansion and contraction of the arm cylinder 23 interposed between the arm 19 and the boom 18, and the bucket 20 is a bucket cylinder 24 interposed between the bucket 20 and the arm 19. The swing cylinder, the boom cylinder 22, the arm cylinder 23, and the bucket cylinder 24 are constituted by hydraulic cylinders (hydraulic equipment). The arm 19 is provided with a hydraulic pressure take-out portion (not shown) for operating a hydraulic attachment attached instead of the bucket 20.

The swivel base 12 has a swivel board 26 made of a thick plate connected to the swivel bearing 11, and a seat (driver's seat) 15 is arranged on the left side in the left-right direction on the swivel base 12. Is covered with a cabin 14.
An engine 41 is disposed horizontally on the rear portion of the swivel board 26 (the swivel base 12), and a radiator fan 48 is disposed on one side of the engine 41 on the left and right sides (right side in the left-right direction). A radiator 42 is disposed on the right side. A cylindrical muffler 43 is arranged on the left and right other side (left and right direction left side) of the engine 41.

A hydraulic oil tank 44 that stores hydraulic oil is disposed in front of the radiator 42, and a fuel tank 45 that stores fuel for the engine 41 is disposed in front of the hydraulic oil tank 44. A control valve (not shown) is disposed above 45.
Further, a counterweight 46 disposed along the outer periphery of the rear portion of the turning substrate 26 is provided at the rear portion of the turning substrate 26, and the weight balance with the work apparatus 13 is adjusted by the counterweight 46.
The engine 41, the radiator 42, and the muffler 43 are covered with a rear bonnet 51 disposed behind the driver's seat 15, and the hydraulic oil tank 44, the fuel tank 45, and the control valve span the swivel base board 26 from the right side to the rear side. The side bonnet 52 is covered from above.

  The rear bonnet 51 includes a rear opening / closing bonnet 53 supported by a hinge mechanism 70 so as to be freely opened and closed on the rear side of the swivel base 12, and a rear fixed bonnet 54 fixed so as not to be opened / closed in front of the rear opening / closing bonnet 53. ing. The rear opening / closing bonnet 53 covers the rear side of the engine 41, the radiator 42 and the muffler 43, and the front upper end thereof is supported by the hinge mechanism 70, and the engine 41, the radiator 42 and the rear opening / closing bonnet 53 are opened by opening the rear opening / closing bonnet 53. Inspection and maintenance of the muffler 43 and the like can be performed. The rear outer peripheral surface 53a of the rear opening / closing bonnet 53 is arcuate along the rear outer periphery of the swivel base 12 (counterweight 46), and the upper surface 53b of the rear opening / closing bonnet 53 is a substantially flat flat surface. ing.

As shown in FIGS. 1 to 3, a flywheel housing 55 is provided on the left side in the left-right direction of the engine 41, and a muffler mounting tool 56 is provided on the upper side of the flywheel housing 55.
The muffler attachment 56 is fixed to the side bracket 57 fixed to the left side surface 55 a of the flywheel housing 55, and to the upper end of the side bracket 57, and to the support member 58 fixed to the upper surface 55 b of the flywheel housing 55. And have.
The side bracket 57 is an L-shaped bracket formed by bending a flat plate into a substantially L shape, and the lower end side is detachably attached to the upper end of the left side surface 55a of the flywheel housing 55, and the bent upper surface 57a is the flywheel housing. It is substantially flush with the upper surface 55b of 55.

The support member 58 is attached to the horizontal plate portion 59 formed in a flat plate shape, a pair of front and rear leg portions 60F and 60R protruding upward from the front and rear portions of the horizontal plate portion 59, and the rear leg portion 60R. And a fixing portion 61 to which the rear side is fixed.
The left and right direction left side of the horizontal plate portion 59 is attached to the upper surface 57a of the side bracket 57 by welding or the like, and the right and left right direction of the horizontal plate portion 59 is detachably attached to the upper surface 55b of the flywheel housing 55b by a fastener such as a bolt. Is attached.
The lower end portion of the front leg portion 60F is attached to the front end portion of the horizontal plate portion 59 by welding or the like. The lower end portion of the rear leg portion 60 </ b> R is attached to the rear side of the horizontal plate portion 59 by welding, and the upper surface thereof has an arc shape along the outer peripheral surface of the muffler 43.

The front and rear leg portions 60F and 60R may be integrated with the horizontal plate portion 59.
The fixing portion 61 is a flat plate formed in an arc shape along the upper surface of the leg portion 60 and welded and fixed to the upper surface of the rear leg portion 60R. The upper surface of the fixing portion 61 is a circle along the outer peripheral surface of the muffler 43. It is arcuate.
The front side (front surface) of the muffler 43 is in contact with the front leg portion 60F and is welded and fixed to the front leg portion 60F. The outer peripheral surface of the rear side of the muffler 43 is in contact with the upper surface of the fixing portion 61 and the rear of the muffler 43 The outer peripheral surface on the side and the upper surface of the fixing portion 61 are fixed by welding, and the muffler 43 and the muffler attachment 56 are integrated.

Therefore, by attaching the muffler attachment 56 to the flywheel housing 55, the muffler 43 is horizontally arranged without being inclined in the front-rear direction.
An inlet 65 is provided slightly downward at the front portion of the muffler 43, and an exhaust manifold 67 is provided at the front portion of the engine 41. The exhaust manifold 67 and the inlet 65 are connected by a pipe 68. .
On the other hand, an outlet 66 is provided slightly upward at the rear portion of the muffler 43, and an exhaust pipe 69 is connected to the outlet 66 through a band 63 so as not to rotate.

The exhaust pipe 69 can be rotated around its axis Q by loosening the band 63.
The exhaust pipe 69 rises upward from the upper end of the outlet 66 and penetrates the rear opening / closing bonnet 53 (rear bonnet 51) from the lower side to the upper side. The upper side of the exhaust pipe 69 is gradually bent backward as it goes upward.
Accordingly, the exhaust gas of the engine 41 can be discharged to the rear of the rear bonnet 51 from the exhaust port 69 a at the upper end of the exhaust pipe 69.

The through hole 71 of the rear opening / closing bonnet 53 through which the exhaust pipe 69 passes is a long hole extending in the front-rear direction in plan view, and the length L of the through hole 71 is such that the rear opening / closing bonnet 53 pivots the hinge mechanism 70. The length is set such that the exhaust pipe 69 protruding from the rear opening / closing bonnet 53 does not interfere when it rotates around the fulcrum P.
In a state where the rear opening / closing bonnet 53 is closed, a cover 72 that covers the upper end of the exhaust pipe 69 and the through hole 71 from above is disposed on the upper surface 53 b of the rear opening / closing bonnet 53.
The cover 72 is located on the rear side of the rear opening / closing bonnet 53 and slightly to the left of the left / right central portion, and is fixed to the upper surface 53b and the back surface of the rear opening / closing bonnet 53 with fasteners such as bolts and nuts. The cover 72 includes a pair of left and right side wall parts 74L and 74R, an upper wall part 75 that connects the upper ends of the left and right side wall parts 74L and 74R, and a lower wall part 76 that connects the lower ends of the left and right side wall parts 74L and 74R. The front wall 77 connecting the front ends of the side wall portions 74L and 74R and the front ends of the upper and lower wall portions 75 and 76, respectively.

The rear portion of the cover 72 is an opening, and this opening is a diffusion port 80 for diffusing wind, as will be described later.
The upper ends of the respective side wall portions 74L and 74R are inclined downwardly so as to gradually move downward as they go from the rear side to the front side. The upper wall portion 75 connects the upper ends of the side wall portions 74L and 74R that have been lowered downward, and the upper surface of the upper wall portion 75 has a downwardly inclined shape that gradually moves downward as it goes from the rear side to the front side. ing.
The lower wall portion 76 is provided with a hole having substantially the same size as the through hole 71 at a position corresponding to the through hole 71 of the rear opening / closing bonnet 53.

Due to the space surrounded by the side walls 74L, 74R, the upper wall 75, the lower wall 76 and the front wall 77, the wind from the rear bonnet 51 is dissipated outwardly through the through hole 71 in the cover 72. An air passage 79 is formed. The rear end portion of the wind passage 79 is a discharge port 80 that opens outward from the wind passage 79 and diffuses the wind, and the discharge port 80 and the exhaust port 69a of the exhaust pipe 69 face rearward.
Instead of providing the lower wall portion 76, the lower side of the cover 72 may be opened and communicated with the inside of the rear opening / closing bonnet 53 (inside the trunk room 76) via the through hole 71. In this case, a space surrounded by the side wall portions 74 </ b> L and 74 </ b> R, the upper wall portion 75, and the front wall 77 becomes the air passage 79.

A wind guide member 90 is disposed on the left side of the cover 72. The wind guide member 90 guides the wind flowing in the rear opening / closing bonnet 53 (in the engine room 78) to the wind passage 79, and is formed in a flat plate shape, for example. The wind guide member 90 is attached to the exhaust pipe 69 or the outlet 66 in the vicinity of the through hole 71. The wind guide member 90 may be mounted on the back side of the rear opening / closing bonnet 53.
The exhaust gas from the engine 41 passes through the muffler 43 to reach the exhaust pipe 69 and is discharged from the exhaust port 69 a of the exhaust pipe 69. At this time, the wind flowing in the rear opening / closing bonnet 53 strikes the wind guide member 90 and reaches the wind passage 79 in the cover 72 through the through hole 71, and the wind passes through the wind passage 79 and is discharged from the diffusion port 80 ( Dissipate). Then, the exhaust gas discharged from the exhaust port 69 a is pushed out to the diffusion port 80 by the wind in the wind passage 79 and discharged to the rear of the rear opening / closing bonnet 53.

According to the swivel working machine having the above configuration, the exhaust pipe 69 passes through the rear upper part of the rear opening / closing bonnet 53 and protrudes upward to cover the upper end of the exhaust pipe 69 and the through hole 71 of the rear opening / closing bonnet 53 upward. Since the rear cover bonnet 53 is fitted with a cover 72 that covers the rear, the exhaust gas can be discharged above the rear open / close bonnet 53, and it is possible to prevent the exhaust gas from being directly sprayed onto a short plant or plant. The cover 72 can prevent rain and wind from entering the rear opening / closing bonnet 53 via the exhaust pipe 69.
In addition, the cover 72 is formed with a wind passage 79 for diffusing the wind from the rear opening / closing bonnet 53 outwardly through the through hole 71 through which the exhaust pipe 69 passes, so The exhaust gas discharged from the exhaust pipe 69 can be efficiently discharged to the outside by using the wind that passes through.

FIG. 6 shows a second embodiment of the turning work machine (backhoe). This turning work machine 1 </ b> B is provided with a cover 72 so that the angle of the cover 72 can be changed with respect to the rear opening / closing bonnet 53.
A circular flange 88 protruding from the outer peripheral wall of the cover 72 is provided on the lower wall portion 76 of the cover 72. The flange 88 is placed on the upper surface 53 b of the rear opening / closing bonnet 53 so that it can move integrally with the cover 72.
The flange 88 is provided with an arc-shaped elongated hole 85 centered on the rising axis Q of the exhaust pipe 69, and the rear opening / closing bonnet 53 protrudes upward from the upper surface 53 b and is inserted into the elongated hole 85 of the flange 88. An insertion tool 87 (for example, a bolt) is provided.

A fastener 89 such as a nut is fastened to the insertion tool 87 (bolt) from the lower surface side of the rear opening / closing bonnet 53. If the fastener 89 fastened to the insertion tool 87 is loosened and the insertion tool 87 is moved along the long hole 85, the range until the direction of the diffusion port 80 provided in the cover 72 changes from the rear side to the side ( The angle can be changed at 0 ° to 90 °, and if the insertion tool 87 and the fastener 89 are fastened, the angle of the diffusion port 80 can be fixed at a predetermined angle.
For example, as shown in FIG. 6, in the cover 72 that is leaning to the left side from the left and right center part of the rear opening / closing bonnet 53 (the swivel base 12), the direction of the diffusion port 80 is directed from the rear side to the center side in the left and right direction. When it is changed to the horizontal direction, the exhaust gas discharged from the exhaust port 69a of the exhaust pipe 69 hits the side wall 74L of the cover 72, thereby changing the discharge direction of the exhaust gas from the rear side to the central side in the left-right direction of the swivel base 12. be able to.

If the exhaust gas discharge direction is directed to the center in the left-right direction, the exhaust gas is likely to be distributed to the plants and plants located at the rear of the rear opening / closing bonnet 53, and the exhaust gas is directly applied to the plants and plants. Can be prevented.
The present invention is not limited to the above embodiment. In the above embodiment, the cover 72 is provided on the rear opening / closing bonnet 53, but the cover 72 may be provided on the fixed bonnet 54 that does not open / close.
In the above embodiment, the direction of the exhaust gas is changed by making the cover 72 changeable in angle, but the direction of the exhaust gas may be changed by rotating the exhaust pipe 69 around the axis Q. Good.

It is a side view of the rear part of the turning work machine of the present invention. It is a top view of the part which provided the muffler. It is a front view of the part which provided the muffler. It is a whole side view of a turning work machine. It is a layout view of various devices on the swivel. It is a top view of the part which provided the muffler in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Turning work machine 12 Turning platform 15 Driver's seat 41 Engine 43 Muffler 53 Rear opening / closing bonnet 69 Exhaust pipe 72 Cover

Claims (3)

  A bonnet that covers the engine is arranged to be openable and closable behind the driver's seat on the swivel, and an exhaust pipe connected to the muffler of the engine protrudes upward through the rear upper part of the bonnet, and the upper end of the exhaust pipe is A turning work machine characterized in that a cover that covers the through-hole through which the exhaust pipe passes is disposed on the bonnet.   The cover is formed with a wind passage for radiating the wind from the bonnet outward through the through hole, and a divergence opening for opening the wind outwardly at the end of the wind passage. The turning work machine according to claim 1.   The turning work machine according to claim 2, wherein the cover is provided so as to be capable of changing an angle with respect to a bonnet so as to change the diffusion port from a rear side to a side.

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