JP3115791B2 - Superstructure of turning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper structure of a turning work machine such as a backhoe.

[0002]

2. Description of the Related Art For example, in a turning machine for civil engineering and construction such as a backhoe, a turning machine on a traveling machine base is equipped with a backhoe working device, a sunshade device, an engine, and a cover for covering an upper portion of the turning table. The cover is formed of a main body cover and a hood or the like located on the back side thereof, and is formed of a sheet metal, and covers the engine, the radiator, the air cleaner, and the like.

[0003] The main body cover is integral with the whole surface and is fixed to the mounting portion from above, and the rear support of the sunshade is fixed to the upper surface thereof.

[0004]

Since the main body cover of the prior art is made of metal and is entirely integrated, it is heavy and difficult to manufacture, and its handling is troublesome. The main body cover has a structure that cannot be removed without removing the sunshade device. A first object of the present invention is to provide a support frame having a substantially gate shape in a front view so as to straddle an engine arranged at a rear portion on a swivel table, cover the support frame with a synthetic resin body cover, and fix the support frame. An object of the present invention is to provide an upper structure of a turning work machine that can be reduced in size and manufactured easily and can be easily handled by forming a main body cover into two parts.

A second object of the present invention is to provide a support frame over an engine, fix a synthetic resin main body cover to the support frame, divide the main body cover into left and right parts, and attach a rear support of the sunshade to the support frame. Attaching via a spacer and forming a hole to fit the spacer in the divided main body cover behind the operation unit, it is possible to make the main body cover compact and easy to manufacture, and to fix the rear support without removing the sunshade device It is an object of the present invention to provide an upper structure of a turning work machine in which a split main body cover can be attached and detached only by releasing the cover.

[0006]

A first concrete means for solving the problems in the present invention is a turning platform 4 on a traveling machine base 3.
Further, in the upper structure of the turning working machine equipped with the working device 6, the engine 12 and the main body cover 13 covering the upper part of the engine 12, respectively, a schematic front view of the gate is provided so as to straddle the engine 12 arranged at the rear part on the turning table 4. Support frame 1
1 and a synthetic resin main body cover 13 is fixed to the support frame 11 from above.
Is divided into two on the left and right.

A second concrete means for solving the problem in the present invention is to arrange a working device 6 in the middle of the swivel 4 on the traveling machine base 3 in the left-right direction.
And a sunshade device 8, a fuel tank 9 and an oil tank 10 on the right side, and an engine 12 on the rear side, and a substantially gate-shaped support frame 11 in a front view so as to straddle the engine 12 on the rear part of the swivel 4. A synthetic resin body cover 13 that covers the upper side of the engine 12 and covers the sides of the fuel tank 9 and the oil tank 10 is fixed to the support frame 11 from above. The fuel tank 9 is divided into left and right portions between a portion that covers the side of the oil tank 10 and a rear support 8A of the sunshade 8 is attached to the support frame 11 via a spacer 35,
A spacer 35 is provided on the divided main body cover 13L behind the operation unit 7.
That is, a hole 36 that fits into the hole 36 is formed.

[0008]

A main frame made of a synthetic resin is provided on the swivel base 4 so as to straddle the engine 12 and has a substantially gate-shaped support frame 11 when viewed from the front, and covers the upper part of the engine 12 and the sides of the fuel tank 9 and the oil tank 10. The cover 13 is fixed to the support frame 11. The main body cover 13 is divided into a left and right portion between a rear portion of the operation unit 7 and a portion that covers the sides of the fuel tank 9 and the oil tank 10, so that manufacture and handling are easy.

The rear support 8A of the awning 8 is attached to the support frame 11 via the spacer 35.
When the fixing is released, the split main body cover 13L behind the driving unit 7 can be removed from the support frame 11 together with the spacer 35 even if the rear support 8A exists above the support frame 11.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 8 and 9, a backhoe 1 exemplified as a turning work machine has a turning table 4 supported on a traveling machine base 3 having a crawler traveling device 2 on the left and right so as to freely turn around a vertical axis. The lower portion of the backhoe device (working device) 6 is supported by the backhoe support portion 5.

A backhoe support 5 is provided on the swivel 4.
A driving unit 7 is formed on the left side of the vehicle, and a sunshade device 8 that partitions between the backhoe device 6 and covers the driving unit 7 is mounted.
A fuel tank 9 and an oil tank 10 are disposed on the right side of the backhoe support 5, and a pipe-made support frame 11 and an engine 12 are mounted on the rear side of the fuel tank 9 and the oil tank 10. The main body cover 13 is attached to the support frame 11, the fuel tank 9 and the oil tank 10 are covered with the main body cover 13 and the upper part is covered with the protective cover 14, and the engine 12 is arranged sideways. A front upper part is covered by 13 and a rear upper part and a rear part are surrounded by a bonnet 15. Reference numeral 16 denotes a weight.

The backhoe device 6 includes a backhoe support 5
A boom 19 whose base is supported via a boom pivot shaft 17 and which ascends and descends via a boom cylinder 18, is supported at the tip of the boom 19 via an arm pivot shaft 20, and bends and extends via an arm cylinder 21. And a bucket (work implement) 25 that is supported at the tip of the arm 22 via a bucket pivot shaft 23 and that performs a scraping operation through a bucket cylinder 24.

The boom 19 includes a main boom 19A supported by a boom pivot 17 and an intermediate boom 19B connected to a distal end of the main boom 19A via an intermediate support shaft 28 so as to be swingable about a vertical axis. A tip boom 19C is connected to the tip of the intermediate boom 19B via a tip support shaft 29 so as to be swingable about the longitudinal axis. An offset cylinder 30 is provided between the main boom 19A and the intermediate boom 19B, and the main boom 19A and the tip boom 19C are connected by a link 31 for forming a parallel quadruple link, as shown in FIG. In addition, the operation of the offset cylinder 30 causes the distal end boom 19C, the arm 22, and the bucket 25 to perform offset operations to the left and right with respect to the main boom 19A.

The backhoe 1 drives a hydraulic pump 54 by the engine 12 to supply oil in the oil tank 10 to a hydraulic motor of the crawler traveling device 2 via a control valve 51, and to control the hydraulic cylinders 18, 21 , 24, 30 and the like. 1 to 5, a backhoe support 5 is formed on a substantially circular swivel 4 supported rotatably on a traveling machine base 3 from a front end to a center in a middle portion in the left-right direction. The control valve 51 is arranged on the left side of the device so as to be inclined with respect to the front-back direction,
When the driving unit 7 is disposed via the driver's cab, a sunshade 8 is disposed, a fuel tank 9, an oil tank 10, and a battery 52 are mounted on the right side, and the engine 1 is disposed on the rear side.
2. A radiator 53, a hydraulic pump 54 and the like are mounted, and an air cleaner 34 and the like are arranged. Note that the battery 52 may be arranged above the oil tank 10 in some cases.

The backhoe support portion 5 has left and right side walls 56 fixed on the substrate of the swivel 4 and a bottom wall 55 and a back wall fixed between the left and right side walls 56.
A supports the boom pivot shaft 17 and supports a support pin 58 of the boom cylinder 18 on a bracket 57 fixed to the bottom wall 55. The support frame 11 is formed by forming a pipe having a round, elliptical or rectangular cross section in a portal shape (a downward U-shape) as viewed from the front. The support frame 11 straddles the front upper part of the engine 12 and the radiator 53 on the rear part of the swivel 4. Various members constituting the upper structure on the swivel table 4 are mounted on the support frame 11.

That is, the air cleaner 34, the makeup water tank 60 for the radiator 53, and the like are fixed to the support frame 11 on the left and right sides via a bracket, and the body cover 13 covered from above is mounted on the upper part of the bracket. 59
And are attached via bolts screwed from below. In addition, a awning support column mounting base 61 and a hood mounting bracket are provided on the upper portion of the support frame 11. The hood is attached to the mounting bracket via a hinge, and is detachable from the support frame 11 separately from the main body cover 13.

The main body cover 13 is made of a synthetic resin,
It is made of high-strength resin with excellent weather resistance.
As shown in FIGS. 2 and 5, the fuel tank 9 and the oil tank 1 cover the upper part of the engine 12 and the rear of the operation unit 7.
0, and is divided into left and right portions between a left portion 13L covering the rear of the driving section 7 and a right portion 13R covering the sides of the fuel tank 9 and the oil tank 10.

The lower ends of the left and right divided main body covers 13L and 13R are fixed via positioning means 64 or bolts between the left and right outer peripheral lower covers 63 and the upper surfaces of the rear weights 16 and the like. In FIGS. 1 to 5, a hole 36 is formed in the left divided main body cover 13 </ b> L at a position corresponding to the screw hole of the awning support mounting 61, and a spacer 35 is inserted into this hole 36, and the rear of the awning device 8. A bracket 67 fixed to the lower end of the column 8A is mounted on the mounting base 61 via the spacer 35, and a bolt 68 is screwed into the screw hole of the mounting base 61 from above through the bracket 67 and the spacer 35. .

The front portion of the sunshade 8 is fixed to the side wall 56 of the swivel 4 and the like, and even if the bolt 68 is pulled out, the rear support 8A is immovable. The cover 13L can be detached in the lateral direction together with the spacer 35, so that the left split main body cover 13L can be removed without removing the awning device 8.

In a modified example of the rear column mounting structure shown in FIGS. 6 and 7, the sunshade column mounting base 61 projects forward and backward from the support frame 11, and the bracket 67 has an end connected to the rear column 8A in the above embodiment. Whereas
In this modification, four bolts 6 are connected at the center.
8, one of the large holes 36 of the left divided main body cover 13L is formed.
6, one spacer 35 formed of a square plate material is inserted.

In this modified example, the spacer 35 is large and easy to manufacture, the support of the rear support 8A can be firmly performed, and the left divided main body cover 13L can be removed without detaching the sunshade device 8 as in the previous embodiment. it can. The bracket 6
Numeral 7 is larger in area than the spacer 35 and the sunshade support column mounting base 61, and is configured to press the left divided main body cover 13L from above around it. The bracket 67 presses the main body cover 13 to prevent rainwater from entering through the hole 36.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the sunshade device 8 may have a cabin structure surrounding the driving unit 7, the backhoe support unit 5 may protrude forward from the swivel base 4, and the right split main body cover 13 </ b> R
The fuel tank 9 and the oil tank 10 may not be surrounded, and the mounting table 61 may be fixed to the upper surface of the support frame 11.

[0023]

According to the present invention described in detail above, by forming the main body cover 13 into two parts on the left and right sides, it is possible to reduce the size and manufacture, to simplify the handling, and to provide the support frame 11 with a sunshade. The rear support 8A of the device 8 is attached via a spacer 35, and the spacer 35 is attached to the divided main body cover 13L.
The sunshade device 8 is formed by forming the hole 36 that fits into the sunshade 8.
, The split main body cover 13L can be attached and detached only by releasing the fixing of the rear support 8A.

[Brief description of the drawings]

FIG. 1 is a rear view of a main part showing an embodiment of the present invention.

FIG. 2 is a plan view of the main body cover.

FIG. 3 is a sectional front view showing a mounting structure of a rear support of the sunshade device.

FIG. 4 is a sectional side view showing a mounting structure of a rear support of the sunshade device.

FIG. 5 is a plan view showing the inside of the swivel base.

FIG. 6 is a cross-sectional front view showing a modification of the mounting structure of the rear support of the awning device.

FIG. 7 is a cross-sectional side view showing a modification of the mounting structure of the rear support of the awning device.

FIG. 8 is a side view showing the entire backhoe.

FIG. 9 is a plan view showing the entire backhoe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backhoe 3 Traveling machine stand 4 Revolving base 5 Backhoe support part 6 Backhoe device (working device) 7 Operating part 8 Sunshade device 8A Rear support 11 Support frame 12 Engine 13 Main body cover 35 Spacer 36 Hole

Claims (2)

(57) [Claims] An operating device (6), an engine (12) and an engine (12) are provided on a swivel (4) on a traveling machine stand (3).
In the upper structure of a turning work machine equipped with a main body cover (13) covering the upper part of the turning table, an engine (12) disposed at a rear portion on the turning table (4).
A support frame (11) having a substantially gate shape in front view is provided so as to straddle the cover, and a synthetic resin body cover (13) is placed over the support frame (11) from above and fixed. An upper structure of a turning work machine, which is formed in two pieces. 2. A working device (6) is arranged halfway in the left-right direction of a swivel (4) on a traveling machine stand (3), and an operating unit (7) and a sunshade (5) are provided on the left side of the working device (6). 8)
On the right side, the fuel tank (9) and the oil tank (10)
An engine (12) is arranged on the rear side, and a substantially gate-shaped support frame (11) in front view is provided at a rear portion of the swivel (4) so as to straddle the engine (12).
2) A synthetic resin main body cover (1) that covers the upper part and covers the sides of the fuel tank (9) and the oil tank (10).
3) is fixed to the support frame (11) from above, and this body cover (13) is placed between the rear part of the operating part (7) and the part covering the side of the fuel tank (9) and the oil tank (10). Then, the rear support (8A) of the sunshade (8) is attached to the support frame (11) via a spacer (35), and the spacer is attached to the divided main body cover (13L) behind the operating unit (7). An upper structure of a turning work machine, wherein a hole (36) to be fitted to (35) is formed.