JPH08333771A - Upper structure of turning working machine - Google Patents

Abstract

PURPOSE: To reduce the occupied area of an operating part so as to downsize a working machine by making a supporting frame lightweight so as to be easily handled even by one person, and disposing a driver's seat in an overlapped state above an engine. CONSTITUTION: A working device, an engine 12, a driver's seat 7A and an operating part protecting body 8 are mounted on a turning base 4 on a traveling machine base. A divided frame 11 laid across the engine 12 is provided, and a cover for covering the upper part of the engine 12 is mounted. The supporting frame 11 has a first divided frame 11A laid longitudinally across the engine 12, and a second divided frame 11B laid laterally across the engine 12 and removably connected at the upper part to the upper part of the first divided frame 11A. The first divided frame 11A is provided with a seat base 27 for bearing the rear part of the driver's seat 7A.

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 revolving work machine for civil engineering / construction such as a backhoe, a backhoe work device, a driver's seat, an awning device, an engine, a support frame across the engine, and an upper part of the revolving base are mounted on a revolving base on a traveling platform. A cover is attached to cover the engine.The support frame is an integral part that straddles the engine in the front and rear and left and right.A mounting base is provided in front of this support frame to attach the driver's seat, and the cover is made of sheet metal. And has a main body cover that covers the front upper part of the engine and a bonnet that covers the rear upper part. The rear support of the sunshading device is supported by the main body cover and the bonnet is pivotally supported.

[0003]

In the above-mentioned prior art, since the support frame is a single body and has a large weight, it is difficult for one worker to attach and detach the support frame. Since it is attached to a separate mounting base, the area occupied by the operating section becomes large, making it difficult to make the swivel work machine compact.Because the bonnet is attached to the main body cover, the main body cover can be strengthened. It has to be formed, resulting in high costs.

A first object of the present invention is to divide a support frame into two parts, that is, a support frame that straddles the engine in the front-rear direction and a part that straddles the engine in the left-right direction. It is an object of the present invention to provide a superstructure of a swivel work machine in which the support frame can be easily handled and the occupation area of the operation unit can be reduced by providing the support frame. Second of the present invention
It is an object of the present invention to provide an upper structure of a swivel work machine in which the rear support of the driving part protector is supported on the seat base so that the driving part protector can be firmly supported.

A third object of the present invention is to disassemble, assemble, and manufacture the cover by forming the main body cover of synthetic resin in a lightweight manner and pivotally supporting the bonnet on the divided horizontally long divided frames. It is to provide the superstructure of the revolving work machine.

[0006]

A first specific means for solving the problems in the present invention is a swivel base 4 on a traveling machine base 3.
The work frame 6, the engine 12, the driver's seat 7A, and the driver's protection unit 8 are mounted on the split frame 1 that straddles the engine 12.
In the superstructure of the swivel work machine, which is provided with a cover for covering the engine 12, the support frame 11
Is the first divided frame 11 that straddles the engine 12 in the front-rear direction.
A and the engine 12 are crossed in the left-right direction and the upper part is the first
Second detachably connected to the upper part of the divided frame 11A
And a first divided frame 1 having a divided frame 11B.
1A is provided with a seat base 27 that receives the rear part of the driver's seat 7A.

The second concrete means for solving the problems in the present invention is that, in addition to the first concrete means, the seat base 27 supports the rear support column 8A of the operating section protector 8. is there. A third concrete means for solving the problem in the present invention is, in addition to the first concrete means, the cover is a synthetic resin main body cover 13 covering the front upper part of the engine 12.
Bonnet 1 that covers the upper rear part of the engine 12 and the engine 12
5 and the bonnet 15 is connected to the second divided frame 1
Being pivotal to 1B.

[0008]

The supporting frame 11 is divided into a first divided frame 11A and a second divided frame 11B, each of which is lightweight and easy to handle, and the first divided frame 11A straddles the engine 12 in the front-rear direction. Are mounted and the three legs are attached to the swivel base 4, and the engine 1
The second split frame 11B is arranged so as to straddle 2 in the left-right direction, and one of its legs is attached to the swivel base 4,
The upper portion of the second divided frame 11B is connected to the upper portion of the first divided frame 11A.

A seat base 27 for receiving the rear portion of the driver's seat 7A is provided above the first divided frame 11A.
The driver's seat 7A extends to the upper side of the engine 12,
The area occupied by the driving department is reduced. In addition, the seat base 27 also supports the rear support column 8A of the drive section protector 8. The body cover 13 of the cover is made of a synthetic resin and is lightweight, and the upper portion of the horizontally long divided frame 11B has the engine 1
A bonnet 15 that covers the upper rear part of the vehicle 2 in an openable and closable manner is firmly supported.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 4 and 5, a backhoe 1 exemplified as a swivel work machine has a swivel base 4 supported by a traveling machine base 3 having crawler traveling devices 2 on the left and right sides so that the swivel base 4 can swivel around a vertical axis. 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, a sunshade device (operating unit protector) 8 that partitions the backhoe unit 6 and covers the operating unit 7 is mounted, and a fuel tank 9 and an oil tank are installed on the right side of the backhoe supporting unit 5. 10 and the like are arranged, and a metal support frame 11 and an engine 12 are mounted on the rear side of these.

The upper part of the swivel base 4 is covered with a cover. This cover has a lower cover on which the swivel base 4 is disposed on the outer peripheral portion, a main body cover 13 disposed on the upper side, a bonnet 15 on the rear portion, and the like. Fuel tank 9 and oil tank 10
Is covered with a main body cover 13 and an upper part with a protective cover 14, and the engine 12 is arranged laterally. The main body cover 13 covers the front upper part and the rear upper part and the rear part are surrounded by a bonnet 15. There is. 16 is a swivel base 4
Shows the weights placed on the upper back.

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 is a backbone boom 19A supported by a boom pivot shaft 17, and an intermediate boom 19B connected to the tip of the 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 sunshade device 8 is arranged on the left side of the driving part 32 through the driving base 32, the fuel tank 9, the oil tank 10 and the battery 52 are mounted on the right side, and the engine 12, the radiator are arranged on the rear side. 53, a hydraulic pump 54, etc. are mounted. The battery 52 is arranged above the oil tank 10.

The backhoe support section 5 has left and right side walls 56 fixed to the base 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 the first divided frame 11
It is divided into two parts, A and a second divided frame 11B, and the first divided frame 11A is formed by welding two or three pipes having a circular, elliptical or rectangular cross section, and three legs. 11a, 11b, 11c, and legs 11a, 11b
Is fixed to a front support 61 fixed to the swivel 4 and a bracket 62 fixed to the rear ends of the left and right side walls 56, and the leg portion 11c is fixed to the rear support 63 fixed to the swivel 4.

The front and rear support bases 61 and 63 are bases for supporting the engine 12 via mount rubber. First
The divided frame 11A has a U-shape in a front view, a side view, and a plan view, and is vertically arranged so as to straddle the engine 12 in the front-rear direction, and its upper portions are leg portions 11a, 11b.
The seat base 27 is attached so as to prevent the spread of the seat, and the seat base 27 is located above the engine 12,
A cushion 64 for receiving the rear portion of the driver's seat 7A is provided.

The driver's seat 7A has a support plate 6 on the driver base 32.
The front lower part is rotatably supported around the horizontal axis at 0, the rear part is placed on the seat base 27, and the rear half is arranged so as to overlap above the engine 12. Further, the seat base 27 is attached to the right end thereof through the bolts of the rear support column 8A of the sunshade device 8. The front lower part of the sunshading device 8 is fixed to the operation base 32 or the side wall 56, and the rear support column 8A is connected to the first divided frame 11A to reinforce each other.

The second divided frame 11B is formed by a strip plate material or a pipe material in an L shape in a front view, and one leg portion 11d is fixed on the swivel base 4 via a support plate 65,
The horizontal upper part is horizontally arranged so as to straddle the engine 12 in the left-right direction, and the left end of the upper part and the bracket 66 fixed to the middle part are detachably connected to the first split frame 11A. With the second divided frame 11B fixed, only the first divided frame 11A can be removed from the swivel base 4.

On the upper part of the second divided frame 11B,
As shown in FIG. 6, a pivot support 67 and an open retainer 68 are provided, and the front upper edge of the bonnet 15 is connected via this pivot support 67 so that the open state can be retained by the open retainer 68. ing. The body cover 13 is made of synthetic resin, especially heat resistance,
It has excellent weather resistance and is formed of high-strength resin, and has a shape that covers the upper part of the engine 12, the rear part of the operating part 7, and the lateral sides of the fuel tank 9 and the oil tank 10,
A left side portion 13L that covers the rear of the driving unit 7 and a right side portion 13R that covers the sides of the fuel tank 9 and the oil tank 10 are divided into left and right. The left divided main body cover 13L covers the upper surface around the seat base 27, and the cushion 64 is exposed.

The lower ends of the left and right divided main body covers 13L and 13R are bolts on the upper surface of the engine room partition wall fixed to the swivel 4, the lower covers on the left and right outer peripheries of the swivel 4, the weight 16 at the rear of the swivel 4, and the like. Since it is detachably fixed via a locking tool or the like, it can be attached and detached without removing the bonnet 15. FIG. 6 shows a sealing structure between the upper edge of the body cover 13 and the bonnet 15.
A seal member 71 is provided on the upper edge of the bonnet 15 so as to project the seal projection 71A outward.
It is possible to make contact with the inclined contact portion 15A formed on the upper edge. The inclined contact portion 15A may be formed vertically as shown by a two-dot chain line in FIG.

FIG. 7 shows a seal structure between the side edge of the body cover 13 and the bonnet 15.
A seal member 71 extending from the upper edge or provided separately from the upper edge is provided so as to project the seal protrusion 71A outwardly, and is in contact with the inner surface of the back wall portion of the bonnet 15. It is accessible. FIG. 8 shows a sealing structure between the upper surface of the weight 16 and the bonnet 15. A seal member 72 is provided at the lower edge of the bonnet 15, and the seal projection of the seal member 72 is the upper surface of the weight 16. Can be contacted with.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the support frame 11 has one or two legs in front and rear,
Forming a left leg on the second divided frame 11B,
The upper part of the main body cover 13 may be attached to the support frame 11, particularly the second divided frame 11B, or the second divided frame 11B may be formed of a pipe. Further, a rear lower cover may be arranged at the position of the weight 16, and a weight may be provided between the rear lower cover and the swivel base 4.

[0024]

According to the present invention described in detail above, the support frame 11 includes the first divided frame 11A that straddles the engine 12 in the front-rear direction and the first divided frame 11A that straddles the engine 12 in the left-right direction. A seat base 2 having a second split frame 11B detachably connected to the upper portion, and the rear portion of the driver's seat 7A being received by the first split frame 11A.
Since 7 is provided, the support frame 11 is lightweight and 1
It can be easily handled even by a person, and the driver's seat 7A can be disposed above the engine 12 in an overlapping manner to reduce the area occupied by the operator's section 7 and to make the working machine compact.

Further, since the rear support column 8A of the operating part protector 8 is supported on the seat base 27, the operating part protector 8 can be firmly supported and can be easily attached and detached. Further, the cover is a synthetic resin main body cover 13 that covers the front upper part of the engine 12 and a bonnet 15 that covers the rear upper part of the engine 12 in an openable and closable manner.
And has this bonnet 15 as the second divided frame 11
Since it is pivotally supported on B, the main body cover 13 can be easily disassembled and assembled.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view showing the entire backhoe.

FIG. 5 is a plan view showing the entire backhoe.

FIG. 6 is a cross-sectional side view showing a seal structure between an upper portion of a main body cover and a bonnet.

FIG. 7 is a cross-sectional plan view showing a sealing structure between a side portion of the main body cover and a bonnet.

FIG. 8 is a cross-sectional side view showing a seal structure between a weight and a bonnet.

[Explanation of symbols]

 1 backhoe 3 traveling platform 4 swivel 6 backhoe device (working device) 7 driver 7A driver's seat 8 sun protection device (driver protector) 8A rear column 11 support frame 11A first split frame 11B second split frame 12 engine 13 Body cover 15 Bonnet 27 Seat stand

Claims (3)

[Claims] 1. A working device (6), an engine (12), a driver's seat (7A) and a driver protector (8) are mounted on a swivel base (4) on a traveling platform (3), and an engine ( In the upper structure of the swivel work machine in which a support frame (11) straddling the engine (12) is provided and a cover for covering the upper side of the engine (12) is attached, the support frame (11) is a first structure that straddles the engine (12) in the front-rear direction. Split frame (11A) and engine (1
2) in the left-right direction and having a second split frame (11B) whose upper part is detachably connected to the upper part of the first split frame (11A).
The seat base (2) which receives the rear part of the driver's seat (7A) in (A)
7) The upper structure of the swing working machine characterized by being provided. 2. The upper structure of the swing working machine according to claim 1, wherein the seat base (27) supports a rear support column (8A) of the operating part protection body (8). 3. The body cover (13) made of synthetic resin for covering the front upper part of the engine (12) and the engine (1).
2) has a bonnet (15) that covers the upper rear part of the hood (15) so that the bonnet (15) can be opened and closed.
1B) is pivotally supported, The upper structure of the swing working machine according to claim 1.