JPH1060955A - Cutting edge mounting device for blades in construction machinery - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the frequency of replacement of a cutting edge due to abrasion accompanying a leveling operation in a cutting edge mounting device for fastening a cutting edge to a blade of a construction machine with a bolt. A blade body (4) is provided with a screw hole (4a) into which a screw part of a bolt (6) is screwed.
Is provided with an elongated hole 7a whose longitudinal direction coincides with the direction in which the cutting edge 7 extends. The cutting edge 7 is first fastened to the blade body 4 by a bolt 6 positioned at the left end of the long hole 7a as shown in the figure. If the cutting edge 7 is worn due to the leveling work and the amount of protrusion from the blade body 4 is reduced, the bolt 6 is loosened and the cutting edge 7 is moved in the direction of arrow L to adjust the amount of protrusion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting edge mounting apparatus for fastening a cutting edge to a blade of a hydraulic shovel or other construction machine with a bolt.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a hydraulic excavator in which an upper swing body 2 is swingably mounted on a lower running body 1 and a blade 3 for leveling is mounted in front of the lower running body 1. Show.

FIGS. 4 and 5 show a conventional cutting edge mounting device, in which a screw hole 4a is provided in a blade body 4, and a circular bolt hole 5 is formed in a cutting edge 5. FIG.
a is provided. Fastening bolt 6 is bolt hole 5a
And the screw portion is screwed into the screw hole 4a.

FIG. 6 shows a cutting edge mounting device disclosed in Japanese Utility Model Laid-Open Publication No. 63-171455.
A wedge driving protrusion 9 is fixed to the blade main body 8, and a mounting hole of a cutting edge 10 is fitted into the wedge driving protrusion 9. A wedge driving hole 9a is provided in the wedge driving projection projecting from the mounting hole to the front surface of the cutting edge 10, and the wedge driving hole 9a is provided.
A wedge 11 is driven into a. The cutting edge 10 is fixed to the blade body 8 by the wedge 11.
This cutting edge mounting device is for facilitating replacement of the cutting edge 10.

[0005]

In the above-described conventional cutting edge mounting apparatus, the cutting edge can be easily replaced, but the frequency of replacement does not change. Therefore, replacement parts are required each time and the running cost is increased. I do. An object of the present invention is to eliminate the difficulty very easily.

[0006]

The present invention is characterized in that the bolt hole of the cutting edge is an elongated hole whose longitudinal direction matches the direction in which the cutting edge extends.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In both figures, the same components as those in FIGS. 4 and 5 are denoted by the same reference numerals.

[0008] The cutting edge 7 is provided with an elongated hole 7a which is a bolt hole through which the bolt 6 passes. This long hole 7
The longitudinal direction of a coincides with the direction in which the cutting edge 7 extends. Other configurations are the same as those in FIGS.

The cutting edge 7 is firstly fastened to the blade body 4 by a bolt 6 located at the left end of the long hole 7 as shown in the figure. If the cutting edge 7 is worn due to the leveling work and the overhang from the blade body 4 is reduced, the overhang is adjusted by loosening the bolt 6 and sliding the cutting edge 7 in the direction of the arrow L. Can be. That is, the frequency of component replacement is reduced.

[0010]

As described above, according to the present invention, it is possible to reduce the frequency of exchanging the cutting edge associated with the terrain work and reduce the running cost of the machine.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention,

FIG. 2 is a side view showing a part of FIG. 1 in section;

FIG. 3 is a side view showing an example of a conventional hydraulic excavator to which a blade is attached.

FIG. 4 is a plan view showing a blade cutting edge mounting apparatus in a conventional construction machine;

FIG. 5 is a side view showing a part of FIG. 4 in section;

FIG. 6 is a perspective view showing a cutting edge mounting device for a blade in a known construction machine.

[Explanation of symbols]

 4 Blade body 4a Screw hole 6 Bolt 7 Cutting edge 7a Slotted hole

Claims (1)

[Claims] 1. A cutting edge mounting apparatus for fastening a cutting edge to a blade of a construction machine by a bolt, wherein the cutting edge is provided with an elongated bolt hole whose longitudinal direction matches the direction in which the cutting edge extends. A cutting edge mounting device, wherein the cutting edge is fixed through bolts.