JP2877717B2 - 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 backhoe working device, a sunshade device, an engine and a cover for covering a rear upper portion of the turning table are mounted on a turning table on a traveling machine stand. The cover is formed of a main body cover and a bonnet or the like located on the rear side thereof, and is formed of a sheet metal, and covers the engine, the radiator, the air cleaner, and the like.

[0003]

The sunshade, the body cover, the air cleaner and the like of the prior art are supported on a swivel base via separate brackets, or an air cleaner or the like is attached to the body cover. Their mounting structures are complicated and uncoordinated, making them difficult to manufacture.

According to the present invention, a pipe-shaped support frame having a downward U-shape in front view is provided so as to straddle an engine disposed at a rear portion on a swivel base, and various auxiliary tools and a plurality of auxiliary tools arranged on the swivel base are provided on the support frame. An object of the present invention is to provide an upper structure of a turning work machine in which a cover or the like is attached, the structure is simple, the production is easy, and the attachment strength can be improved.

[0005]

A first concrete means for solving the problems in the present invention is a turning platform 4 on a traveling machine base 3.
In the upper structure of the turning work machine in which the working device 6, the awning device 8, the engine 12, and the main body cover 13 covering the upper part of the engine 12 are mounted, a front view so as to straddle the engine 12 arranged at the rear part on the turning table 4. A downwardly U-shaped pipe support frame 11 is provided, an auxiliary device 34 is fixed to the support frame 11, a main body cover 13 is attached so as to cover the support frame from above, and a support 8 A of the sunshade device 8 is fixed to the support frame 11. At the same time, the pivotal support 35 of the bonnet 15 covering at least the rear of the engine 12 is fixed.

A second specific means for solving the problem in the present invention is that a cover for covering a working device 6, a sunshade device 8, an engine 12, and a rear upper portion of the swivel base 4 is provided on the swivel base 4 on the traveling machine base 3. In the upper structure of the turning work machine formed of the main body cover 13 and the bonnet 15 located on the back side of the main body cover 13, the cover straddles the engine 12 and the radiator 36 arranged at the rear part on the turning table 4. As shown in FIG.
A support cover 34 is fixed to the support frame 11 and a synthetic resin body cover 13 is attached so as to cover from above.
3, the support 8A of the sunshade 8 is fixed, the rear opening edge 13b of the main body cover 13 is positioned near the support frame 11, and the pivotal support 35 of the bonnet 15 is moved rearward from the support frame 11 to the opening edge 13b. It is protruding.

[0007]

A working device 6, a awning device 8, and an engine 12 are mounted on a swivel 4 on the traveling machine base 3, and a rearward U-shaped front view of the U-shaped so as to straddle the engine 12 is provided on a rear portion of the swivel 4 at the rear thereof. A pipe support frame 11 is provided. The support frame 11 fixes an auxiliary device 34 such as an air cleaner, attaches the main body cover 13, and supports the support 8 of the sunshade 8.
A and the pivotal support 35 of the bonnet 15 are fixed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 9 and 10, a backhoe 1 exemplified as a turning work machine has a turning table 4 supported on a traveling machine stand 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.

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 the 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 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 plurality of hydraulic pumps by an engine 12 to supply oil in an oil tank 10 to a hydraulic motor of the crawler traveling device 2 through a control valve, and to control the hydraulic cylinders 18, 18. 21, 24
, 30 and the like. In FIGS. 1 to 3, a substantially circular swivel 4 that is rotatably supported on a traveling machine base 3 is formed with a backhoe support 5 from the front end to the center at a middle part in the left-right direction. A control valve 51 is disposed on the left side of the vehicle, and an awning device 8 is disposed when the operation unit 7 is disposed via the driver's cab, and a fuel tank 9, an oil tank 10 and a battery 52 are mounted on the right side. On the side, an engine 12, a radiator 53, a hydraulic pump 54 and the like are mounted, and an air cleaner (auxiliary device) 34 and the like are arranged.

The backhoe support portion 5 has left and right side walls 56 fixed to the left and right sides of the bottom wall 55. The left and right side walls 56 support the boom pivot 17 of the main boom 19A, and a boom is attached to a bracket 57 fixed to the bottom wall 55. Support pin 5 for cylinder 18
8 is supported. The support frame 11 is formed by forming a pipe having a round, elliptical or rectangular cross section in a downward U-shape when viewed from the front (rear view). The support frame 11 straddles the front upper portion of the engine 12 and the radiator 53 on the rear portion 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 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 thereof. 59
(Shown in FIG. 6). 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. Further, other supporting devices such as a suction pipe 68 of the air cleaner 34, an oil pipe communicating with the oil tank 10, and a harness are appropriately mounted on the support frame 11 via brackets, bands, and the like.

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 FIG. 8, the upper part of the engine 12
Between the left portion 13L covering the rear of the operating portion 7 and the right portion 13R covering the sides of the fuel tank 9 and the oil tank 10. Is divided into right and left.

At the lower end of the main body cover 13, FIGS.
As shown in FIG.
Are provided to seal between the upper and lower surfaces of the lower cover 63 on the left and right outer periphery and the weight 64 at the rear, which constitute the swivel table 4, to prevent noise leakage and vibration propagation. At the lower end of the main body cover 13, a plurality of engagement holes 65 are formed in the circumferential direction of the swivel base 4, and the lower cover 63 is formed.
And a pin 66 erected on the upper surface of the weight 64 and the like, and these constitute a positioning means 42 for regulating the position of the body cover 13 in the lateral direction.

In FIG. 6, the sunshade support mounting 61 is shown.
Is a plate having substantially the same thickness as the main body cover 13, a through hole 13 a of the main body cover 13 is fitted therein, and a bracket 67 fixed to the lower end of the rear support 8 </ b> A of the sunshade 8 is bolted to the upper surface thereof. The bracket 67 has a larger area than the awning support mount 61, and presses the main body cover 13 from above around the bracket 67 so as to clamp the main body cover 13. The bracket 67 presses the main body cover 13 to prevent rainwater from entering the through hole 13a.

In FIGS. 1 and 4, bonnet mounting brackets 62 are provided at the upper left and right of the support frame 11 at two positions protruding rearward, and retain a hinge 69 for pivotally supporting the bonnet 15 and the bonnet 15 open. The opening holder 70 is mounted, and the hinge 69, the opening holder 70, and the like constitute the pivot support 35. Body cover 13
An opening 13 is formed so that the back side is closed by the bonnet 15, and the edge 13 b of this opening is located near the support frame 11 with a rain gutter groove, placed on the bonnet mounting bracket 62, and hinged 69 Axis part is opening edge 1
3b.

The release holder 70 includes a board 71 fixed to the bonnet mounting bracket 62 and a bonnet 15.
A guide rod 72 fixed to the base plate 71 and a connecting rod 74 pivotally supported at one end by the base plate 71 and having a pin 73 at the other end. A groove 72A is formed, and the pin 73 is engaged. When the bonnet 15 is opened upward and the pin 73 is engaged with the return portion of the guide groove 72A, the bonnet 15 is opened so as not to be closed. Can hold.

In FIG. 7, reference numeral 82 denotes a cab (step 8).
6) A mat placed on top of the mat 82. A rising portion 82A is formed on the periphery of the right side and the rear side of the mat 82, and the lower portion of the seat stand cover 85, the front support of the sunshade device 8, and the like operate. It covers the part 7 side and covers the mounting bolts 83 that attach them. Mat 82
The central upper step portion obscures the mounting bolt of step 86.

At the rising portion 82A of the mat 82, the seat cover 8
5. Close to the lower part of the front support etc. of the sunshade device 8,
A relief recess 84 is formed. Note that the mat 82 has a rising portion 82A on the periphery thereof, so that the mat 82 can be easily attached and detached. In FIGS. 1 to 3, a suction hose 90 connecting the oil tank 10 and the hydraulic pump 54 is arranged in a U-shape on the suction side of the radiator 53. Hydraulic oil passing through the inside is cooled. As a result, the temperature of the hydraulic oil can be reduced, the hydraulic actuator can be operated stably, and the cost can be reduced by omitting the oil cooler. It is also possible to arrange a return oil hose (pipe) on the suction side of the radiator 53.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the main body cover 13 and the bracket 67 of the rear support column 8A may be fastened together to the sunshade support column mounting base 61, or the main body cover 13 may be supported by the bonnet mounting bracket 62.

[0023]

According to the present invention described in detail above, the sunshade device 8, the main body cover 13, the auxiliary device 34, and the like can be easily and firmly attached to the support frame 11 provided on the swivel base 4, The structure is simple and easy to manufacture, and the mounting strength can be improved. Further, even if the body cover 13 is made of a synthetic resin, the various members can be attached by the support frame 11 and the support of the bonnet 15 can be made simple and favorable.

[Brief description of the drawings]

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

FIG. 2 is a rear view of the main part.

FIG. 3 is a side view of the main part.

FIG. 4 is a sectional side view showing the structure of the upper part of the support frame.

FIG. 5 is a sectional view of a lower portion of a main body cover.

FIG. 6 is a cross-sectional rear view showing an attachment structure of a sunshade support.

FIG. 7 is a sectional view of a driver seat mat.

FIG. 8 is a partial cross-sectional plan view of a main body cover.

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

FIG. 10 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) 8 Sunshade device 11 Support frame 12 Engine 13 Main body cover 14 Protective cover 15 Bonnet 34 Air cleaner (assisting device) 35

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-212665 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02F 9/08 E02F 9/00

Claims (2)

(57) [Claims] 1. A working unit (6), a sunshade (8), an engine (12), and a main body cover (13) for covering the engine (12). An engine (12) disposed at a rear portion on the swivel (4), in an upper structure of the mounted swinging work machine;
A support frame (11) made of a pipe having a downward U-shape in a front view is provided so as to straddle, and an auxiliary device (34) is fixed to the support frame (11), and a main body cover (13) is attached so as to cover from above. And support frame (11)
And fix the support (8A) of the awning device (8) to
An upper structure of a turning work machine, wherein a pivotal support (35) of a bonnet (15) covering at least the rear of the engine (12) is fixed. 2. A work cover (6), an awning device (8), an engine (12) and a cover for covering the rear upper portion of the swivel (4) are mounted on the swivel (4) on the traveling machine base (3). In the upper structure of a turning work machine formed of this cover with a main body cover (13) and a bonnet (15) located on the back side of the main body cover (13), an engine arranged at a rear portion on the turning table (4) (12)
And a support frame (11) made of a downwardly U-shaped pipe is provided so as to straddle the radiator (3) 6), and the auxiliary device (34) is fixed to the support frame (11) and is put on from above. Resin body cover (13)
And the support (8A) of the sunshade (8) is fixed to the support frame (11) by penetrating the main body cover (13), and the rear opening edge (13b) of the main body cover (13) is fixed.
Is positioned near the support frame (11), and the bonnet (1) is positioned rearward from the support frame (11) to the opening edge (13b).
5) An upper structure of a turning work machine characterized by projecting the pivotal support (35).