JPH047247Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The invention relates to a quick coupler that removably connects the lift arm and tilt link of an earth-moving machine to a working device such as an excavation bucket. This invention relates to a quick coupler that is attached to and detached from a connecting hole of an excavation bucket.

[Problem that the invention attempts to solve]

The conventional quick coupler has a hitch member connected to the lift arm and reel link of the earthmoving machine body,
It consists of a hook member integrally formed on the back side of the working device, and the hitch member is adapted to be engaged and connected to the hook member of the working device. This method requires a hook to be formed on a working device such as an excavating bucket, and cannot be used with existing working devices that are connected through pin holes in the stay.

In addition, conventional quick couplers that engage with hooks tend to play when used in equipment that performs severe work, such as excavation buckets, and there is a risk that the lower connecting portion may become disengaged.

For this reason, Utility Model Application Publication No. 58-124548, Utility Model Application Publication No. 60
- As in Publication No. 186364, a connecting means is provided in the lower connecting part of the coupler, with left and right pins fixed to the cylinder side and rod side of the hydraulic cylinder, and the left and right pins are connected to the pin hole of the working device by cylinder stroke. Known to haunt and combine.

However, in conventional devices of this type,
Since the left and right pins are pushed out indirectly through a drive device such as a cylinder interposed between them, there is a lot of force loss, and the drive device has a moving part, and this movable part is exposed to the outside. Because of this, there was a problem that it was easy to break down due to dirt, etc.

Furthermore, in the conventional quick coupler, the top and bottom connection positions on the Kochi side are fixed to a predetermined dimension, so
If the vertical spacing of the connecting holes on the working device side changes, it becomes unusable. In order to solve this problem,
Japanese Patent No. 59809 proposes a main body base having upper and lower hooks that is divided into two parts so that the position of the hooks can be changed. but,
In this device, in order to change the position of the hook, one side of the main body base having the arm connection hole must be moved at the same time, making it difficult to move the hook while the arm is pivoted.

Therefore, an object of the present invention is to be able to displace only the bearing member independently with respect to the main body base member, and to drive the slide pin fitted to the boss of the bearing member by a driving means that does not have a movable part. The object of the present invention is to provide a quick coupler that can be directly extruded.

[Means to solve the problem]

The above object of the present invention is to provide upper and lower connecting parts for connecting the lift arm and tilt arm of the earthmoving machine main body on the back side of the main body base member, and upper and lower bearing members for connecting the working equipment on the front side. In the quick coupler equipped with
a, 6b is attached to the main body base arm 1 so as to be vertically displaceable, and at least a pair of left and right bearing posts 1 provided on a movable bearing member that is vertically displaceable.
Hollow slide pins 18, 18 with bottoms having chambers 17 inside are slidably fitted into the holes 0a, 10b, and both ends of the rod 16, which has an oil passage 14 for working fluid passed through its axis, are connected to the left and right sides. A pair of hollow slide pins 18, 18 are fitted into the chamber 17 in a liquid-tight and slidable manner, and the slide pins 18, 18 directly protrude outside the bearing bosses 10a, 10b due to the pressure of the working fluid injected into the chamber 17. This can be achieved by doing this.

[Example of idea]

Next, one embodiment of the present invention will be described based on the drawings.

As shown in Figure 1, the quick coupler is attached to the back side of the main body base member 1 of the earthmoving machine body (the figure is omitted).
The upper and lower bearing parts 4a and 4b are provided for connecting the lift arm 2 and the tilt arm 3, and the upper and lower bearing parts 4a and 4b are provided for connecting the stay 5' of a working device 5 such as an excavating bucket to the front side of the base member 1. , lower bearing members 6a, 6b are provided.

As shown in FIG. 2, the upper bearing part (connection part) 4a and the lower bearing part (connection part) 4b on the back side are a pair of left and right stays 7a, 7b integral with the base member 1.
In the embodiment shown in FIG. 1, the relt link 3 is attached to the upper bearing part 4a, and the lower bearing part 4b is attached to the lower bearing part 4b.
The lift arm 2 is pivotally attached to each of the two for use.

As shown in FIG. 3, the upper bearing member 6 on the front side
A is composed of a pair of left and right brackets 8, 8 having bearing bosses 8', and is integrally fixed to the base member 1.

On the other hand, the lower bearing member 6b on the front side of the base member 1
As shown in FIGS. 3 and 4, the slide member 9
Bearing bosses 10a, 1 are installed on the left and right brackets 9', 9'.
0b is integrally provided, and the slide member 9
Engagement grooves 11a in the vertical direction on the left and right sides of the
11b, and these engagement grooves 11a, 11
b is slidably engaged with vertical guides 12a and 12b formed on the main body base member 1. In the illustrated embodiment, an opening 12 having left and right incisal edges parallel to each other is provided in the main body base member 1, and the left and right edges of this opening 12 are used as guides 12a and 12b. Thus, the lower bearing member 6b on the front side is mounted so as to be vertically displaceable by slidably engaging the engagement grooves 11a, 11b of the slide member 9 and the guides 12a, 12b of the main body base member 1.

Furthermore, the left and right bearing bosses 10 of the lower bearing member 6b
A shaft body 13 that expands and contracts by a fluid pressure operating mechanism such as grease is fitted between a and 10b. That is, in the illustrated embodiment, the telescopic shaft 13 has an oil passage 14 extending through the shaft, and a rod 16 provided with a working fluid injection nozzle 15 such as grease communicating with the oil passage 14. A pair of left and right flanged slide pins 18, 18 are provided with a hollow chamber 17 of a predetermined length along the left and right sides.
A grease cylinder is used in which both ends of the rod 16 are liquid-tightly fitted into the chambers 17, 18 of the rod 18, and the left and right slide pins 18, 18 are slid onto the left and right bearing bosses 10a, 10b of the lower bearing member 6b, respectively. They fit together freely.

In addition, the rod 16 of the telescopic shaft 13 is connected to the bracket 1.
9 is fixed to the slide member 9 of the lower bearing member 6b. Further, 20 is a plug of the chamber 17 of the slide pin 18, and 21 is an O-ring.

Thus, by pressurizing the working fluid such as grease from the nozzle 15 and expanding the hollow chambers 17, 17 of the slide pins 18, 18, the slide pins 18, 18 are extended to the outside of the bearing bosses 10a, 10b, and the working fluid is By pushing pins 18 and 18 back inward while pulling out pin 1,
8 and 18 are shortened inside the bosses 10a and 10b.

In addition, since the pins 18 are fitted into the pin holes of the working device by extension, the left and right bosses 10
The outer width between a and 10b is made narrower than the inner width between the left and right connecting members of the working device.

A stopper 21 is provided at the lower end of the opening 12 of the main body base member 1 to restrict further descent of the lower bearing member 6b.

In the illustrated embodiment, a grease cylinder type telescopic shaft body 13 similar to that fitted to the lower bearing member 6b is also used for the upper bearing member 6a on the front side as a connecting pin with the working device 5. The connecting pin of the member 6a is not necessarily limited to the illustrated embodiment, and other pivot means may be used.

Next, to explain the operation of the present invention, first, work is performed on the front side upper bearing member 6a of the quick coupler, which connects the upper and lower bearing parts 4a and 4b on the back side to the Celtic link 3 and lift arm 2 of the earthmoving machine body. Device 5
Pivotally attached to the upper connecting hole. Next, the slide member 9 is slid along the guides 12a, 12b of the base member 1 so that the bearing bosses 10a, 10b of the front lower bearing member 6b are aligned with the lower connection hole of the working device.

Thus, the bearing bosses 10a, 10b and pin 1
8 and 18 and the connecting hole of the working device 5, when fluid such as grease is injected from the nozzle 15 of the rod 16 of the telescopic shaft 13 into the chamber 17 of the slide pin 18 through the internal oil passage 14, the slide pin 18 , 18 extend and protrude outward, and the working device 5
(See Figure 4).

If a similar grease cylinder is used for the upper bearing member 6a as in the illustrated embodiment, connection can be made in the same manner as described above.

When removing the working device from the coupler, the connection can be easily released by simply pushing the pin 18 back inward while removing the grease from the telescoping shaft.

[Effect of idea]

As described above, in this invention, the movable bearing part can be moved up and down independently with respect to the main body base member, so the position of only the movable bearing part can be adjusted while the lift arm and tilt arm are pivotally attached to the main body base member. is easy.

Furthermore, since the slide pins are pushed out by the working fluid supplied through the inside of the rod, there are no moving parts between the pins, so there is no fear of them being affected by earth and sand. Furthermore, since a straight pushing force is applied directly to the internal axes of the left and right slide pins, there is no loss of force and smooth operation is guaranteed.

[Brief explanation of the drawing]

Fig. 1 is a side view of a quick coupler according to an embodiment of the present invention, Fig. 2 is a rear view seen from the right side of Fig. 1, Fig. 3 is a front view seen from the left side of Fig. 1, and Fig. 4
The figure is a sectional view taken along the line -- in FIG. 3. 1... Body base member, 2... Lift arm,
3...Tilt link, 4a...Back side upper bearing part, 4b...Back side lower bearing part, 5...Work device, 6a...Front side upper bearing member, 6b...Front side lower bearing member, 9... ...Slide member, 11a,
11b...Engagement groove, 12a, 12b...Guide,
12... Opening, 13... Telescopic shaft, 14... Oil passage, 16... Rod, 17... Hollow chamber, 1
8...Slide pin, 19...Bracket.

Claims (1)

[Scope of utility model registration request] In a quick coupler, the front side of the quick coupler is equipped with upper and lower connecting parts for connecting the lift arm and tilt arm of the earthmoving machine main body on the back side of the main body base member, and upper and lower bearing members for connecting the working equipment on the front side. One of the side upper and lower bearing members 6a, 6b,
A hollow slide pin 18 with a bottom and having a chamber 17 inside is attached to the main body base arm 1 so as to be vertically displaceable, and is attached to at least a pair of left and right bearing posts 10a and 10b provided on a movable bearing member that is vertically displaceable. .
8 in a fluid-tight and slidable manner,
The pressure of the working fluid injected into the chamber 17 causes the slide pins 18, 18 to directly engage the bearing bosses 10a,
A quick coupler characterized by protruding to the outside of 10b.