JPH08302736A - Upper structure of swivel working machine - Google Patents

Abstract

PURPOSE: To enable miniaturization and the facilitation of manufacture, to simplify handling and to mount and demount split main-body covers only by releasing the fixing of a rear post, without removing a sun blind device by forming a main body cover in two right-left pieces. CONSTITUTION: An operating device, a driving section, a sun-blind device fuel tank, an oil tank and an engine 12 are arranged to a swivel base 4 on a travelling machine base respectively, a bearing frame 11 having an approximately portal type in a front view is installed so as to cross the engine 12 disposed at a rear section on the swivel base 4, and a main body cover covering the upper section of the engine 12 and being made of a synthetic resin is fixed onto the bearing frame 11 from the upper side. The main body cover is divided into the right and left between the rear section of the driving section and a section covering the sides of the fuel tank and the oil tank, a rear post 8A for a sun blind device is installed to the bearing frame 11 through spacers 35, and holes fitted to the spacers 35 are formed to a split main-body cover 13L at the rear of the driving section.

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 swing working machine such as a backhoe.

[0002]

2. Description of the Related Art For example, in a swing working machine for civil engineering and construction such as a backhoe, a backhoe working device, a sunshade device, an engine and a cover for covering an upper part of the swivel are mounted on a swivel platform on a traveling machine base. The cover is formed of a main body cover and a bonnet or the like located on the back side thereof, and is formed of sheet metal, respectively, and covers the engine, the radiator, the air cleaner and the like.

The main body cover is a one-piece body and is fixed to the mounting portion from the upper side, and the rear support of the sunshading device is fixed to the upper surface thereof.

[0004]

Since the main body cover of the prior art is made of metal and is integral with the entire surface, it is heavy and difficult to manufacture, and it is also troublesome to handle. Further, the main body cover has a structure that cannot be attached or 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 of a swivel base, and to fix the support frame by covering a main body cover made of synthetic resin, It is an object of the present invention to provide an upper structure of a swivel work machine in which the body cover is divided into left and right parts, which can be downsized, facilitated in manufacture, and can be handled easily.

A second object of the present invention is to provide a support frame straddling the engine, to which a synthetic resin main body cover is fixed, and to divide the main body cover into right and left, and to provide the support frame with the rear support of the sunshade device. By mounting via a spacer and forming a hole that fits into the spacer in the split main body cover at the rear of the operating part, the main body cover can be made smaller and easier to manufacture, and the rear support column can be fixed without removing the sunshade device. It is an object of the present invention to provide a superstructure of a swing working machine in which the split main body cover can be attached and detached only by releasing.

[0006]

A first specific means for solving the problems in the present invention is a swivel base 4 on a traveling machine base 3.
In the upper structure of the revolving work machine in which the working device 6, the engine 12, and the main body cover 13 that covers the upper side of the engine 12 are respectively mounted, a front view schematic gate is provided so as to straddle the engine 12 arranged at the rear portion of the revolving base 4. Shaped support frame 1
1, and a main body cover 13 made of synthetic resin is fixed to the support frame 11 from above to fix the main body cover 13
That is, it is divided into two parts.

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

[0008]

A supporting frame 11 having a substantially gate shape in front view is provided on the swivel base 4 so as to straddle the engine 12, and a main body made of a synthetic resin that covers the upper side of the engine 12 and the sides of the fuel tank 9 and the oil tank 10 is provided. The cover 13 is fixed to the support frame 11. The main body cover 13 is divided into left and right portions 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, which facilitates manufacture and handling.

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

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 8 and 9, a backhoe 1 exemplified as a swivel work machine has a swivel base 4 rotatably supported around a vertical axis on a traveling machine base 3 having crawler traveling devices 2 on the left and right. A lower portion of a backhoe device (working device) 6 is supported by the backhoe support unit 5.

On the swivel base 4, a backhoe support 5 is provided.
An operating unit 7 is formed on the left side of the vehicle, and an awning device 8 that partitions the backhoe unit 6 and covers the operating unit 7 is attached.
A fuel tank 9, an oil tank 10 and the like are arranged on the right side of the backhoe support portion 5, and a pipe support frame 11 and an engine 12 are mounted on the rear side thereof. A 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 portion is covered with a protective cover 14, and the engine 12 is disposed laterally. A front upper part is covered with 13, and a rear upper part and a rear part are surrounded by a bonnet 15. 16 indicates a weight.

The backhoe device 6 comprises a backhoe support 5
A boom 19 whose base is supported via a boom pivot shaft 17 and which is elevated and lowered via a boom cylinder 18, and a boom 19 which is supported at the tip of the boom 19 via an arm pivot shaft 20 and extends and retracts via an arm cylinder 21. The arm 22 and a bucket (work implement) 25 supported by a bucket pivot shaft 23 at the tip of the arm 22 and scraped by a bucket cylinder 24 for soil removal operation.

The boom 19 includes a backbone boom 19A supported by a boom pivot shaft 17, and an intermediate boom 19B connected to the tip end of the backbone boom 19A via an intermediate support shaft 28 so as to be swingable about a vertical axis. The intermediate boom 19B has a tip boom 19C connected to the tip end thereof via a tip support shaft 29 so as to be swingable about a vertical axis. An offset cylinder 30 is provided between the backbone boom 19A and the intermediate boom 19B, and the backbone boom 19A and the tip boom 19C are connected by a linkage link 31 for forming a parallel four-link structure, as shown in FIG. In addition, the operation of the offset cylinder 30 causes the tip boom 19C, the arm 22, and the bucket 25 to be laterally offset with respect to the backbone boom 19A.

The backhoe 1 drives the hydraulic pump 54 by the engine 12 to supply the oil in the oil tank 10 to the hydraulic motor of the crawler traveling device 2 via the control valve 51, and at the same time, the hydraulic cylinders 18 and 21. , 24, 30 and the like can be appropriately supplied. 1 to 5, a backhoe support portion 5 is formed on a substantially circular revolving base 4 rotatably supported on a traveling machine base 3 from a front end to a central side in a middle portion in the left-right direction. The control valve 51 is arranged on the left side of the
Further, the sunshade device 8 is arranged together with the operation part 7 arranged via the driver's cab, the fuel tank 9, the oil tank 10 and the battery 52 are mounted on the right side, and the engine 1 is arranged on the rear side.
2, the radiator 53, the hydraulic pump 54 and the like are mounted, and the air cleaner 34 and the like are arranged. The battery 52 may be arranged above the oil tank 10.

The backhoe support portion 5 has left and right side walls 56 fixed to the base plate of the swivel base 4, and a bottom wall 55 and a back wall fixed between the left and right side walls 56.
A boom pivot shaft 17 of A is supported, and a support pin 58 of the boom cylinder 18 is supported by a bracket 57 fixed to the bottom wall 55. The support frame 11 is formed by forming a pipe having a round shape, an elliptical shape, or a rectangular shape in a gate shape in a front view (downward U-shape), and straddles a front portion of the engine 12 and the radiator 53 at a rear portion on the swivel base 4. The support frame 11 is mounted with various members constituting the upper structure on the swivel base 4.

That is, the air cleaner 34, the makeup water tank 60 for the radiator 53, etc. are fixed to the left and right side portions of the support frame 11 via brackets, and the main body cover 13 covered from above is mounted on the upper portion of the bracket. 59
Also, it is attached via a bolt that is screwed from below. Further, an awning support mount 61 and a bonnet mounting bracket are provided on the upper portion of the support frame 11. The bonnet is attached to the attachment bracket via a hinge, and can be attached to and detached from the support frame 11 separately from the main body cover 13.

The body cover 13 is made of synthetic resin, especially heat resistance,
It is made of high-strength resin with excellent weather resistance.
2 and 5, the upper part of the engine 12 is covered, the rear part of the operating part 7 is covered, and the fuel tank 9 and the oil tank 1 are covered.
It has a shape that covers the side of 0, and is divided into a left side and a right side between a left portion 13L that covers the rear of the operating unit 7 and a right portion 13R that covers 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 between the lower cover 63 on the left and right outer peripheries and the upper surfaces of the weight 16 and the like at the rear through positioning means 64 or bolts. 1 to 5, a hole 36 is formed in the left divided main body cover 13L at a position corresponding to a screw hole of the sunshade support base 61, and a spacer 35 is inserted into the hole 36, and The bracket 67 fixed to the lower end of the column 8A is placed on the mounting base 61 via the spacer 35, and the bolt 68 penetrates the bracket 67 and the spacer 35 from above and is screwed into the screw hole of the mounting base 61. .

The front portion of the sunshading device 8 is fixed to the side wall 56 of the swivel base 4 and the like, and the rear support column 8A does not move even if the bolt 68 is removed. When the bolt 68 is removed from the bracket 67, the left split main body is obtained. 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 sunshade device 8.

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

In this modification, the spacer 35 is large and easy to manufacture, the rear support 8A can be firmly supported, and the left split main body cover 13L can be removed without removing the sunshade device 8 as in the case of the previous embodiment. it can. The bracket 6
7 has a larger area than the spacer 35 and the sunshade support base 61, and is designed to press the left split main body cover 13L from above around the area. The bracket 67 holds the main body cover 13 to prevent rainwater from entering through the holes 36.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the awning device 8 may have a cabin structure that surrounds the periphery of the driving unit 7, the backhoe support unit 5 may project forward from the swivel base 4, and the right split main body cover 13R may include:
The fuel tank 9 and the oil tank 10 may not be enclosed, and the mount 61 may be fixed to the upper surface of the support frame 11.

[0023]

According to the present invention described in detail above, the main body cover 13 is divided into left and right parts, so that the main body cover 13 can be miniaturized and manufactured easily, and can be handled easily. The rear column 8A of the device 8 is attached via the spacer 35, and the spacer 35 is attached to the divided main body cover 13L.
By forming a hole 36 that fits in the sunshade device 8
Even without removing, the split main body cover 13L can be attached and detached only by releasing the fixing of the rear support column 8A.

[Brief description of drawings]

FIG. 1 is a rear view of an essential 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 column of the sunshade device.

FIG. 4 is a sectional side view showing a mounting structure of a rear column of the sunshading device.

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

FIG. 6 is a sectional front view showing a modified example of the mounting structure of the rear column of the sunshading device.

FIG. 7 is a sectional side view showing a modified example of the mounting structure of the rear column of the sunshading device.

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

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

[Explanation of symbols]

 1 backhoe 3 traveling platform 4 swivel 5 backhoe support part 6 backhoe device (working device) 7 operating part 8 sunshade device 8A rear column 11 support frame 12 engine 13 body cover 35 spacer 36 holes

Claims (2)

[Claims] 1. A working device (6), an engine (12) and an engine (12) are mounted on a swivel base (4) on a traveling platform (3).
In a superstructure of a revolving work machine equipped with a body cover (13) for covering the upper part of the engine, an engine (12) arranged at a rear part of the revolving base (4).
A support frame (11) having a substantially gate shape in a front view is provided so as to straddle the front and back, and the support frame (11) is covered with a main body cover (13) made of synthetic resin from above and fixed, and the main body cover (13) is left and right. A superstructure of a swing working machine characterized by being formed in two. 2. A working device (6) is arranged on the traveling platform (3) midway in the left-right direction of the swivel base (4), and the operating unit (7) and the sunshading device (6) are arranged on the left side of the working device (6). 8)
Fuel tank (9) and oil tank (10) on the right
The engines (12) are respectively arranged on the rear side, and a support frame (11) having a substantially gate shape in a front view is provided at the rear of the swivel base (4) so as to straddle the engine (12).
2) a synthetic resin body cover (1) that covers the upper side of the fuel tank (9) and the oil tank (10).
3) is fixed to the support frame (11) from the upper side, and the main body cover (13) is provided between the rear part of the operating part (7) and the part covering the sides of the fuel tank (9) and the oil tank (10). And install the rear support (8A) of the awning device (8) on the support frame (11) via the spacer (35), and install the spacer on the split main body cover (13L) at the rear of the operating unit (7). A superstructure of a swivel work machine, wherein a hole (36) to be fitted in (35) is formed.