JPH045576Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a coupling device for an upper rotating body and a lower traveling body in construction machines such as hydraulic excavators and other industrial machines.

(Prior Art) FIGS. 5 to 7 show an example of a coupling device for an upper rotating body and a lower traveling body in a conventional hydraulic excavator. In FIG. It is connected to the undercarriage body 3 via the undercarriage body 3 so as to be able to freely turn around a vertical axis. 2 is a front attachment attached to the upper revolving body 1.

A large hydraulic excavator is divided into three parts: an upper rotating body 1, a lower traveling body 3, and a front attachment 2 due to weight restrictions during transportation. In this case, as shown in FIG.
Unscrew and remove the numerous bolts 5 screwed into screw holes 4d drilled in the inner ring 4b of the slewing bearing 4 through the bolt holes 3a of the slewing bearing 4. It is necessary to unscrew and remove the large number of bolts 6 that pass through the drilled bolt holes 4e and are screwed into the screw holes 1a drilled in the upper rotating body 1. In FIG. 7, the ball 4f interposed between the outer ring 4a and the inner ring 4b is an internal tooth provided on the inner surface of the inner ring 4b.

(Problem to be solved by the invention) Therefore, in the above conventional device, the bolt 5
and 6, there was a problem in that it took a long time to disassemble and assemble the upper revolving structure 1 and the lower traveling structure 3.

(Means for Solving the Problems) In view of the above, the present invention aims to make it possible to easily disassemble and assemble the upper rotating body and the lower traveling body in a short time, and its gist is The outer ring of the swing bearing is attached to the lower part of the upper rotating body, the coupling ring is attached to the upper part of the lower running body, the coupling ring is removably fitted into the inner ring of the swing bearing, and the coupling ring is biased by a spring. A plurality of pins protruding from the outer peripheral surface of the coupling ring are installed at predetermined intervals in the circumferential direction, a plurality of holes corresponding to the pins are provided on the inner periphery of the inner ring, and a horizontal hole is provided in each of the pins. A filament is sequentially passed through through holes drilled in the direction, and by shortening or extending the length of the filament, the pin is retracted or advanced to enable the inner ring to be pulled out or coupled. A coupling device for an upper rotating body and a lower traveling body is characterized in that a length adjusting means is attached.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 4. 1 is an upper rotating body, 3 is a lower traveling body, 4
is a swing bearing, which is composed of an outer ring 4a, an inner ring 4b, and balls 4c. Swivel bearing 4
The outer ring 4a is fastened to the lower part of the upper rotating body 1 by a bolt 6 that passes through the spacer 8 and a bolt hole 4e drilled in the outer ring 4a and is screwed into a screw hole 1a drilled in the upper rotating body 1. has been done. Reference numeral 9 denotes a coupling ring, which passes through the spacer 7 and the bolt hole 3a drilled in the undercarriage body 3, and is connected to the lower carriage body 3 by a bolt 5 screwed into a screw hole 9a bored in the coupling ring 9.
is fastened to the top of the Numeral 10 is a pin, and as shown in FIG.
1 in the radial direction, and is fitted into a hole 4g provided on the inner surface of the inner ring 4b of the swing bearing 4. Reference numeral 12 denotes a wire made of spring steel, which is passed sequentially through the through holes 10a formed in each pin 10, as shown in FIGS. 2 and 3, one end of which is fixed to the coupling ring 9, and the other The length can be adjusted by a length adjustment means such as a screw (not shown) provided at the end.

Therefore, when connecting the upper revolving structure 1 and the lower traveling structure 3, by increasing the length of the filament 12 using the length adjusting means, the pin 10 can be fixed to the spring behind it as shown in FIG. 11, it advances from the outer peripheral surface of the coupling ring 9 and fits into the hole 4g bored in the inner surface of the inner ring 4b of the swing bearing 4, and thus the upper rotating structure 1 and the lower traveling structure 3 turn. They are mutually coupled via bearings 4.

When dividing the upper revolving structure 1 and the lower traveling structure 3, the filaments 12 are shortened by the length adjusting means. Then, as shown in FIG. 4, the arc of the filament 12 becomes smaller, so the pin 10 retreats against the spring 11 and comes out of the hole 4g of the inner ring 4b. Since the swing bearing 4 and the coupling ring 9 are thus separated, the upper revolving structure 1 and the lower traveling structure 3 are separated.

(Operations and Effects of the Invention) The present invention has an outer ring of a swing bearing attached to the lower part of the upper revolving body, and is urged by a spring from the outer circumferential surface of the outer ring to a coupling ring attached to the upper part of the lower revolving body. A plurality of pins that fit into holes drilled on the inner surface of the inner ring of the slewing bearing are installed at predetermined intervals along the circumferential direction, and the through holes drilled in each of the pins are sequentially passed through. Since a length adjustment means is attached to the filament, by extending or shortening the length of the filament, a plurality of pins can be made to protrude or retract from the outer peripheral surface of the coupling ring. It can be fitted into or removed from a hole bored in the inner surface of the inner ring of the slewing bearing. In this way, the upper rotating body and the lower traveling body can be connected or disassembled in a short time by simply extending or shortening the filaments.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part showing the state when coupled,
2 is a sectional view taken along the - line in FIG. 1, FIG. 3 is a sectional view taken along the - line in FIG. 5 to 7 show a conventional coupling device for the upper rotating body and lower traveling body of a hydraulic excavator, FIG. 5 is a side view of the hydraulic excavator, FIG. 6 is a perspective view of the coupling device, and FIG. FIG. 3 is a partial longitudinal sectional view of the coupling device; Upper rotating body...1, Swing bearing...4, Outer ring...4a, Inner ring...4b, Lower running body...3,
Coupling ring...9, Pin...10, Through hole...10
a. Spring...11, Hole...4g, Line...12.

Claims (1)

[Scope of utility model registration request] Attach the outer ring of the slewing bearing to the lower part of the upper rotating body, and attach the coupling ring to the upper part of the lower traveling body.
The coupling ring is removably fitted into the inner ring of the slewing bearing, and a plurality of pins that are biased by a spring and protrude from the outer peripheral surface of the coupling ring are installed in the coupling ring at predetermined intervals in the circumferential direction. , a plurality of holes corresponding to the pins are provided on the inner periphery of the inner ring, and filaments are sequentially passed through the through-holes made laterally in each of the pins, and the filaments are provided with a length of the filament. A coupling device for an upper revolving structure and a lower traveling structure, characterized in that a length adjusting means is attached for shortening or extending the pin to draw in or advance the pin to enable the inner race to be pulled out or coupled.