JP2003074085A - Revolving work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a wider operation space in front of an operation seat by arranging the operation seat in the rear as much as possible. SOLUTION: In this revolving work machine, an engine 9 and a muffler 18 are arranged in a rear part of a revolving stand 6 arranged on a traveling device 3 so as to be freely revolvable around a vertical shaft, these member are covered with a hood 15, and the operation seat 18 is arranged in front of the hood 15 corresponding to the muffler 18. The muffler 18 is slantingly arranged forward and downward so that a front part of the muffler 18 is positioned under the operation seat 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a backhoe, and more particularly to a vibration preventing structure for an engine.

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning work machine such as a backhoe, and more particularly to a structure for arranging a muffler.

[0003]

2. Description of the Related Art Conventionally, for example, in a backhoe, a swivel base is provided on a traveling device so as to be freely rotatable around a vertical swivel axis, an excavation device is provided in the front part of the swivel base, and an engine is placed horizontally in the rear part. The hydraulic pumps are placed on the left and right sides of the engine.The muffler is placed above the hydraulic pump so that the longitudinal direction is the front-back direction, and the engine, hydraulic pump, and muffler can be opened and closed by the bonnet. There is a vehicle seat that is installed in front of the hood that covers the muffler.

[0004]

In the above-mentioned backhoe, the driver's seat should be arranged as rearward as possible in order to secure a large driving space in front of the driver's seat so that the driver can drive well. However, since the muffler has been arranged horizontally in the front-rear direction in the past, the driver's seat was arranged in front of the muffler with the front wall of the hood separated. Therefore, the driver's seat and the muffler need to be placed in front of the front end of the muffler, which limits the placement of the driver's seat in the rear.Therefore, a sufficient driving space should be provided in front of the driver's seat. There was a problem that could not be.

In view of the above-mentioned problems, the present invention allows the driver's seat to be arranged as rearward as possible so that a wider driving space can be provided in front of the driver's seat.

[0006]

The technical means of the present invention for solving this technical problem is to provide an engine 9 and a muffler 18 at the rear part of a swivel base 6 which is provided on a traveling device 3 so as to be rotatable about a vertical axis. Are arranged, and these are covered with the bonnet 15, and in the turning work machine in which the driver's seat 18 is provided in front of the bonnet 15 corresponding to the muffler 18, the front part of the muffler 18 is positioned below the driver's seat 8. ,
The muffler 18 is located at the front of the muffler.

According to another technical means of the present invention, a horizontal step portion 47 corresponding to the lower side of the driver's seat 8 is formed on the bonnet front wall portion 16 of the bonnet 15, and the step portion 17 is formed.
The front part of the muffler 8 is inserted below the. According to another technical means of the present invention, the muffler 18 is
The point is that it is formed in an elliptic cylinder shape that is flat in the up-down direction and long in the front-back direction. Another technical means of the present invention is that an engine 9 is arranged at the rear of the swivel base 6, a hydraulic pump 11 is arranged on one side of the engine 9, and a muffler 18 is arranged above the hydraulic pump 11. There is a point.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a backhoe, which is exemplified as a turning work machine. The backhoe 1 is mainly composed of an upper swing body 2 and a lower traveling device 3, and a swivel base 6 rotates around a vertical axis. The rear surface side of the swivel base 6 is arcuate in plan view (substantially arcuate) so that the rear surface side of the swivel base 6 does not extend beyond the lateral width of the traveling device 3 even when the vehicle turns.
It is called a small rear small turning backhoe configured in.

The running direction of the backhoe 1 (the left-right direction in FIG. 1) is called the front-rear direction, and the lateral direction orthogonal to the front-rear direction (the penetrating direction in FIG. 1) is the left-right direction. The traveling device 3 rotatably supports an idler 3B, a drive wheel 3C, a track roller and a carrier roller on both left and right sides of the track frame 3A, and a rubber crawler type (or iron crawler type) crawler traveling body 4 is wound around them. A crawler type traveling device in which the driving wheels 3C are driven by a hydraulic motor or the like is used. A dozer 5 is provided at the front of the traveling device 3.

The revolving structure 2 includes a revolving base 6 which is supported on a traveling device 3 so as to be revolvable around a vertical axis, and a working device (excavation device) 7 provided in front of the revolving base 6. Swivel 6
Driver's seat 8 provided above, engine 9, fuel tank 1
0, hydraulic pump 11, hydraulic oil tank 12, radiator 1
4, a battery 17, a muffler 18, various devices mounted on the swivel base 6 such as the air cleaner 25 shown in FIG. 3, and the like. The swivel 6 is provided with a bonnet 15 that covers various devices such as the engine 9 and the fuel tank 10 mounted on the swivel 6, and the bonnet 15 is
It has a bonnet front wall portion 16, a bonnet right side wall portion 37, a bonnet left side wall portion 35, and a bonnet rear wall portion 36.

The driver's seat 8 is arranged in the middle of the swivel base 6 in the front-rear direction, and is arranged to the left from the center in the left-right direction, and as shown in FIG. It is supported by etc. The swivel base 6 is attached and fixed to the swivel frame 19 and a rear portion of the swivel frame 19 so as to balance the weight with respect to the working device 7 and the like provided in the front portion of the swivel base 6 together with the engine 9 and the like, and the rear portion of the swivel base 6. And a counterweight 20 (protector) that configures the above.

The left and right side surfaces, the front surface and the upper surface of the turning frame 19 such as the front side of the driver's seat 8 are appropriately covered with a cover body 23 and the like. The revolving frame 19 is provided with a revolving substrate 22 supported on the traveling device 3 via a revolving bearing 21 so as to be revolvable around the vertical axis, and a reinforcing member, various devices, and the like are mounted and fixed on the revolving substrate 22. A mounting member for fixing is fixed. At the front of the swivel board 22,
A pair of upper and lower support brackets 2 projecting forward from the swivel base 6
6, a swing bracket 27 is supported on the support bracket 26 so as to be swingable right and left around the vertical axis.

A boom 28 is swingably supported around the horizontal axis on the swing bracket 27, an arm 29 is swingably supported around the horizontal axis on the tip end side of the boom 28, and an arm 29 is provided. The working device 7 is mainly composed of a bucket 30 attached to the tip end side so as to be capable of squeeze / dump operation. The boom 28, the arm 29, and the bucket 30 are a boom cylinder 31, an arm cylinder 32, which are hydraulic cylinders, respectively. The bucket cylinder 33 is operable. At the rear of the swivel board 22 and on the rear side of the driver's seat 8 (at the rear of the swivel base 6), the engine 9
Is placed horizontally (so that the axis of the crankshaft faces left and right)
A hydraulic pump 11 that supplies pressure oil to various hydraulic devices is disposed on the left side (one side on the left and right) of the engine 9, and a muffler 18 is disposed above the hydraulic pump 11.
An air cleaner 25 is arranged above the muffler 18.

A radiator 14 is arranged on the right side (the other side on the left and right) of the engine 9, and a radiator 14 is arranged on the front side of the engine 9, on the right side of the turning board 22, and on the front side of the radiator 14 and the like. A hydraulic oil tank 12 for storing pressure oil, a fuel tank 10, and a battery 17 are arranged. The engine 9, the radiator 14, the hydraulic oil tank 12 and the like are projected upward from the swivel base 6, and a portion above the swivel base 6 in the arrangement space of the engine 9, the hydraulic pump 11, the muffler 18, the air cleaner 25 and the like. The upper front, front and left sides are covered with a support frame 34 (see FIG. 4) fixed to the swivel frame 19 and a bonnet front wall portion 16 and a bonnet left side wall portion 35 mounted and fixed to the swivel frame 19 and the like. There is.

The rear side of the space above the swivel base 6 in the space for disposing the engine 9, the hydraulic pump 11, the radiator 14, the muffler 18, the air cleaner 25, etc. is covered by the bonnet rear wall 36. As shown in FIG. 3, the bonnet rear wall portion 36 is attached to the support frame 34, the bonnet front wall portion 16 or the like so as to be vertically swingable around the support shaft 41, and is openable / closable. The bonnet rear wall portion 36 is provided on the swivel base 6 (counterweight 2
0) It is formed in a shape that conforms to the shape of the rear surface, and is formed in an arc shape projecting to the rear side in plan view.

Therefore, the shape of the rear surface of the bonnet rear wall portion 36 is formed in a curved shape so as to move forward from the central portion in the left-right direction toward the outer side in the left-right direction. The hydraulic oil tank 12, the fuel tank 10, and the battery 17 are covered by the bonnet right side wall portion 37.
The bonnet right side wall portion 37 is configured so as to cover the radiator 14 and the like on the rear side. Further, the bonnet right side wall portion 37 has an opening / closing cover 43, and by rotating the opening / closing cover 43 of the bonnet right side wall portion 37, the hydraulic oil tank 12, the fuel tank 10, the battery 1
7, the radiator 14 and the like are arranged so as to have an open space.

As shown in FIGS. 3 and 4, the support frame 34 includes a rear leg portion 34R and a pair of left and right front leg portions 34F.
And an upper plate 34A connected to the upper ends of these leg portions 34F and 34R and to which the bonnet front wall portion 16 and the like are attached
And is arranged so as to straddle the engine 9, and the lower ends of the rear leg portions 34R and the front leg portions 34F are attached and fixed to the swivel board 22 and the like via the partition wall 51 and the like. In front of the driver's seat 8, a pair of left and right traveling control levers 3 are provided to operate the left and right traveling bodies 4 separately.
8L and 38R are arranged, and control consoles 39L and 39R are arranged on both left and right sides of the driver's seat 8.

A boom / bucket operating lever 40 for operating the boom 28 and the bucket 30 is provided on the right control console 39R. In addition, on the left control console 39L,
A turning motor for turning the turning base 6 and a turning / arm operation lever 43 for operating the arm 29 are provided.
As shown in FIGS. 3 and 5, the central side of the bonnet front wall portion 16 of the bonnet 15 is recessed rearward of both side portions, and becomes a horizontal step below the driver's seat 8. A portion 47 is formed, and an opening window 48 is formed in the central portion of the bonnet front wall portion 16.

As shown in FIGS. 2 to 4, the muffler 1 is
8 is formed in an elliptic cylinder shape that is flat in the up-down direction and long in the front-rear direction, and is slanted in the bonnet 15 so as to move downward toward the front, and the front part of the muffler 18 has a bonnet. It is inserted below the stepped portion 47 of the front wall portion 16. Therefore, the rear part of the driver's seat 8
The muffler 18 is inserted through the step 47 of the bonnet front wall 16.
Is located above the front of the. Therefore, the driver's seat 8
It can be arranged as rearward as possible on the swivel base 6 so as to be located above the front part of the muffler 18, and a sufficiently large driving space can be secured in front of the driver's seat 8.
Further, since the muffler 18 can be arranged in the bonnet 15 as close to the front as possible, the space at the rear portion of the bonnet 15 becomes large, and the rear wall portion 36 of the bonnet is opened so that the rear portion of the bonnet 15 can be opened. Work during maintenance becomes easy.

The present invention is not limited to the above embodiment, but can be variously modified.

[0021]

According to the present invention, the driver's seat can be arranged as rearward as possible, and a wider driving space can be provided in front of the driver's seat.

[Brief description of drawings]

FIG. 1 is a side view of a backhoe showing an embodiment of the present invention.

FIG. 2 is a plan view of the swivel base.

FIG. 3 is a side view of the bonnet portion.

FIG. 4 is a rear view of the swivel base.

FIG. 5 is a perspective view of a front wall portion and a rear wall portion of the bonnet.

[Explanation of symbols]

3 traveling devices 6 swivel base 8 driver's seat 9 engine 15 bonnet 16 Front wall of bonnet 18 muffler 65 Vertical dispersion means 47 steps

Continued front page    (72) Inventor Kenji Hita             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory (72) Inventor Toshiaki Otani             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F-term (reference) 2D015 CA02                 3D038 BA14 BB09 BC07                 3G004 AA03 BA00 BA04 DA01 DA11                       DA12 DA13

Claims (4)

[Claims] 1. An engine (9) and a muffler (18) are arranged at the rear of a swivel base (6) provided on a traveling device (3) so as to be rotatable about a vertical axis, and these are mounted on a bonnet (1).
5) In the swing working machine in which the driver's seat (18) is provided in front of the hood (15) corresponding to the muffler (18), the front part of the muffler (18) is located below the driver's seat (8). A swivel work machine characterized in that the muffler (18) is arranged so as to be positioned so as to be slanted downward. 2. The hood front wall portion (16) of the bonnet (15) is provided with a horizontal step portion (47) corresponding to the lower side of the driver's seat (8), and the step portion (17) is formed. ), The front portion of the muffler (18) is inserted below the muffler (18). 3. The swivel work machine according to claim 1, wherein the muffler (18) is formed in an elliptic cylinder shape that is flat in the vertical direction and long in the front-rear direction. 4. An engine (9) is arranged at the rear of the swivel base (6), a hydraulic pump (11) is arranged on one side of the engine (9), and a muffler is arranged above the hydraulic pump (11). (18) is arrange | positioned, The turning working machine of Claim 1 characterized by the above-mentioned.