JP2886813B2 - Upper swing type crawler dump - 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 revolving type crawler dump having an upper revolving unit which is rotatable above a lower traveling unit and has a dump carrier, and more particularly relates to a swing machine and piping. The present invention relates to an upper swing type crawler dump provided with a protective cover for protecting a connection center swivel joint on an upper swing body.

[0002]

2. Description of the Related Art In an upper turning type work vehicle having a turning machine on a lower running body, a turning circle is generally mounted on the upper center of the lower running body, and the turning circle is connected to the upper turning center. The upper revolving superstructure is swung. The revolving circle is provided with internal teeth, and the upper revolving body is provided with a pinion and a revolving motor (hereinafter collectively referred to as a swing machine) that mesh with the internal teeth. Then, the upper revolving unit performs the revolving motion via the pinion and the revolving circle by the rotation of the revolving motor.

[0003] An upper swing type crawler dump is disclosed in, for example, Japanese Utility Model Laid-Open No. 55-135640. According to this official gazette, a swing circle is provided at the upper center of the lower traveling body, and the upper swing body is provided on the upper swing body. A hydraulic motor for turning is provided.

FIG. 3 is a side view of a general upper swing type crawler dump, which will be described below with reference to FIG.
An upper revolving unit 3 is connected to a lower traveling unit 1 via a revolving circle 2.
Are pivotably mounted, and the upper revolving unit 3 is configured to revolve around a revolving center CC. A driver's cab 4 is disposed in front of the upper revolving unit 3, and a dump bed 5 is mounted on the rear portion of the upper revolving unit 3 so as to be able to move up and down. A dump cylinder 6 is rotatably mounted between the upper swing body 3 and the dump bed 5, and the dump bed 5 is raised and lowered by the expansion and contraction of the dump cylinder 6. FIG.
Indicates a state in which the dump bed 5 is raised.

FIG. 4 is a view as viewed in the direction A of FIG. 3, and shows a plan view of the center of rotation of a conventional upper-rotating crawler dump. A center swivel joint 10 is provided at a position of a turning center C of the turning circle 2 mounted on the upper turning body 3 side, and a swing machinery 11 is arranged near the center swivel joint 10. The center swivel joint 10 includes a hydraulic device (not shown) provided on the upper revolving unit 3 (for example, a direction switching valve for traveling) and a hydraulic device (not shown) provided on the lower traveling unit 1 side. (The hydraulic motor).

[0006]

However, as shown in FIG. 3, when the dump bed 5 is raised and discharged, soil, rocks and the like may fall out of the dump bed 5.
At this time, in the above configuration, the center swivel joint 10, the swing machinery 11, the piping (not shown) is soiled with sand, or the hydraulic equipment and the piping are damaged when rocks or the like fall. There is a problem to do.

The present invention has been made in view of the above-mentioned problems, and a center swivel joint, a swing machine, piping, and the like are provided on an upper cover so as to be protected from dirt and damage caused by falling objects such as rocks. It is an object of the present invention to provide an upper swivel-type crawler dump that can be easily covered with a center swivel joint and a swing machine in the cover.

[0008]

To achieve the above object, according to the Invention The first invention of the engaging Ru upper portion pivotally dumpers to the present invention, the turning circle on the lower traveling body having a track on the left and right
An upper swing structure that is provided pivot freely via a dump bed that is freely mounted undulations on the upper swing structure, the turning circle
In the upper rotating crawler dump and a swing machinery and the center swivel joint for piping connection disposed swirl driving in part, to cover the upper swing machinery and Sen <br/> data swivel joint, dump bed From
A protective cover to prevent damage due to drop under product is obtained by constituting the upper portion pivotally dumpers with the upper rotating body. According to a second aspect of the present invention, a plate is fixed between the lower surfaces of upper revolving body frames juxtaposed at right and left intervals, and the upper
Attach the center swivel joint at the position of the upper surface of the plate between the body frames, attach the swing machinery in the vicinity, and protect the upper part where the center swivel joint , the swing machinery, and the hydraulic piping connected to the center swivel joint are located the cover, which is constituted in the upper part pivotally dumpers mounted between the upper surface of the upper swing body frame. The third invention is the construction of the first or second aspect of the invention, the protective cover, which is constituted in the upper part pivotally dumpers provided with inspection windows for dipstick of swing machinery.

With this configuration, the swing machinery , the center swivel joint, and the hydraulic piping connected to the center swivel joint are prevented from being stained or damaged by a fallen object from the dump carrier.

It is preferable that an inspection window for oil inspection of the swing machinery is provided on the protective cover. With this configuration, maintenance such as maintenance and inspection of the swing machinery becomes easy.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an upper turning type crawler dump according to the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 are a side view and a plan view, respectively, of the center of rotation of the upper swing type crawler dump. Hereinafter, description will be made based on FIGS. 1 and 2. As shown in FIGS. 1 and 2, the upper swing body 3 has frames 7, 7 juxtaposed at intervals in the left-right direction. On the lower surfaces of the frames 7, 7 spaced apart from each other, plate 8
Are fixed, and a plate 8 between the frames 7
A center swivel joint 10 installed on the upper revolving superstructure 3 side is mounted facing a position where the upper swivel center passes, and a swing machinery 11 is mounted on the plate 8 near the center swivel joint 10. . On the lower surface side of the plate 8, a revolving circle 2 installed on the upper revolving unit 3 side is fixed.
A center swivel joint 10 indicated by a dotted line and installed on the lower traveling body 1 side through the turning center of the vehicle is positioned to penetrate the plate 8, and a pinion indicated by a dotted line provided on the swing machinery 11 penetrates the plate 8. Into the turning circle 2. The center swivel joint 10 and the swing machinery 11 are connected to a hydraulic device such as a switching valve (not shown) disposed in front of the frame 7 by a hydraulic pipe 12.

Above the location where the swing machinery 11 and the hydraulic piping 12 are located, there is provided a protective cover 20 attached so as to cover the upper revolving unit frames 7 and 7 from above. In order to make the protective cover 20 detachable, the protective cover 20 is, for example, provided by a bolt 21, a band formed of a stretchable elastic member such as rubber or a spring and a hook engaged with the band, or by another attaching means. May be attached.

A notch 22 for passing the hydraulic pipe 12 is provided at a front portion of the protection cover 20, and an inspection window 23 for oil inspection of the swing machine 11 is provided at a rear portion of the protection cover 20. For example, swing machinery 11
The inspection by the oil gauge 13 is easy. The inspection window 23 is provided with an inspection window cover 24 for preventing earth and sand from entering. In this embodiment, the inspection window cover 24 is provided to be freely opened and closed by a hinge 25.
Note that, instead of the hinge 25, an attachment means such as a screw or a hook may be used.

Therefore, there is no danger that earth and sand, rocks, etc., may fall directly on the center swivel joint 10, the swing machinery 11, the hydraulic piping 12, etc. to damage them, and the inspection window cover 24 may be connected to the thin two-dot chain line in FIG. Opening as shown by the arrow allows easy inspection of the swing machinery 11.

[0016]

According to the present invention, the center swivel joint, the swing machinery, the pipes, and the like can be protected from earth and sand, rocks, and the like that fall from the dump carrier during discharging of the earth. Therefore, it is possible to prevent the failure of these hydraulic devices due to an impact or the like, and to improve the operation time of the upper swing type crawler dump. Further, since the inspection of the swing machinery can be easily performed by the inspection window cover that can be opened and closed, workability during maintenance can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a turning center portion of an upper turning type crawler dump of the present invention.

FIG. 2 is a plan view of a turning center of the upper turning type crawler dump.

FIG. 3 is an overall side view of the upper swing type crawler dump.

FIG. 4 is a plan view of a turning center of a conventional upper turning type crawler dump.

[Explanation of symbols]

1: Lower traveling body, 2: Revolving circle, 3: Upper revolving body,
4 cab, 5 dump truck, 6 dump cylinder, 7
... Frame, 8 ... Plate, 10 ... Center swivel joint, 11 ... Swing machinery, 12 ... Hydraulic piping,
Reference numeral 20: protective cover, 22: notch, 23: inspection window,
24: inspection window cover, 25: hinge.

Claims (3)

(57) [Claims] And 1. A lower traveling body (1) on the swivel circle (2) an upper turning body provided pivot freely via having a track to the left and right (3), undulations freely on the upper swing structure (3) powered by
And the dump bed (5), distribution to the turning circle (2) section
In the upper rotating crawler dump that includes a set has been swing machinery (11) and the center swivel joint for distribution <br/> pipe connection for turning drive (10), swing machinery (11) and a center swivel joint (10 upper and a coating of) the upper handed the protective cover (20) to prevent damage from drop <br/> bottom product from the dump bed (5)
Top of swivel dumpers you characterized by comprising a rotating body (3). 2. A plate (8) fixed between the lower surface of the left-right direction on the upper swing structure frame juxtaposed at intervals (7,7), the plate between the upper swing body frame (7,7) (8 ) center swivel joint in the position of the top surface (10)
And a swing machine (11) in the vicinity thereof, and a center swivel joint (10) , a swing machine (11) and a center swivel joint.
The hydraulic pipe that connects to (10) (12) protective cover for covering the upward are located (20), on you, wherein the mounting kite between the upper surface of the upper swing body frame (7,7) < Crawler dump with revolving part. 3. The protective cover according to claim 1, wherein an inspection window (23) for oil inspection of the swing machine (11) is provided on the protective cover (20) .
Top of turning crawler dump.