KR20160067458A - Quick coupler for construction machinery having a safety device - Google Patents
Quick coupler for construction machinery having a safety device Download PDFInfo
- Publication number
- KR20160067458A KR20160067458A KR1020140172880A KR20140172880A KR20160067458A KR 20160067458 A KR20160067458 A KR 20160067458A KR 1020140172880 A KR1020140172880 A KR 1020140172880A KR 20140172880 A KR20140172880 A KR 20140172880A KR 20160067458 A KR20160067458 A KR 20160067458A
- Authority
- KR
- South Korea
- Prior art keywords
- hook
- quick coupler
- hydraulic cylinder
- cylinder
- coil spring
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
Abstract
The present invention relates to a quick coupler. The present invention relates to a clamping device comprising a pair of frames provided at a predetermined interval on both sides in a plate shape, a fixing hook for engaging or disengaging a work mechanism from a quick coupler at a lower side of the frame, And a hydraulic cylinder for operating the rotating hook between the fixed hook and the rotating hook, wherein the quick coupler is fitted to an outer peripheral surface of the hydraulic cylinder, And a coil spring for controlling the retraction operation and preventing the hydraulic cylinder including the cylinder rod from escaping in the fixed hook direction. According to the present invention, in addition to the check valve having the hydraulic pressure in the hydraulic cylinder, a separate coil spring is provided in the hydraulic cylinder to provide a double safety structure so that the hydraulic cylinder can be prevented from escaping even if the check valve is lost.
Description
The present invention relates to a quick coupler, and more particularly, to a quick coupler that includes a check valve having a hydraulic pressure in a hydraulic cylinder, and a separate coil spring in a hydraulic cylinder to provide a double safety structure, To a quick coupler which prevents a breakaway.
An excavator, also known as a "forklift," is a device equipped with a rocking arm that can be moved by a track or a wheel, the driver's seat is rotated in all directions, and the car is moved up and down around the driver's seat.
The excavator is constructed so that equipment such as a bucket or rock drill is installed at the tip of the rock band. Therefore, the work of using the excavator is accompanied with the work of selecting and replacing the equipment that matches the characteristics of the work. For this reason, it is common to install a quick coupler which can easily install or separate various equipments at the end of a bar of an excavator.
Prior art publication Utility Model No. 20-2013-0024376 relates to a quick coupler for an excavator that is configured to automatically operate a safety pin used to prevent a detachable hook from being unfastened while the equipment is engaged.
In connection with this prior art, the conventional quick coupler relies solely on the check valve of the hydraulic cylinder to fasten the fixed hook and the pivot hook, and when the function of the check valve is lost because there is no additional safety device, There is a problem that the fixing hook and the rotation hook are disengaged from each other.
Therefore, a technique for solving the above-described problems is required.
On the other hand, the background art described above is technical information acquired by the inventor for the derivation of the present invention or obtained in the derivation process of the present invention, and can not necessarily be a known technology disclosed to the general public before the application of the present invention .
In an embodiment of the present invention, a separate safety coil spring is provided in a hydraulic cylinder in addition to a check valve holding a hydraulic pressure in a hydraulic cylinder, thereby preventing the hydraulic cylinder from being broken even if the check valve is lost There is purpose in.
In addition, an embodiment of the present invention adopts a simple structure that adds a coil spring to a narrow space in a quick coupler to provide a hydraulic pressure of a hydraulic cylinder, thereby safely and continuously maintaining the fastening state of the rotating hook and the fixing hook There is purpose in.
According to an embodiment of the present invention, energy is stored as the coil spring is compressed when the cylinder rod is retracted, and the oil pressure of the hydraulic cylinder is increased as the coil spring, which was compressed when the cylinder rod is advanced, is expanded, So that the fastening speed is improved and the workability is remarkably improved.
Further, according to one embodiment of the present invention, by adding a coil spring in the structure of the quick coupler made of a check valve, the structural safety of the quick coupler is improved, so that even if the hydraulic cylinder can not exhibit its function, And to prevent human accidents that may occur in the future.
According to a first aspect of the present invention, there is provided, as a technical means for achieving the above-mentioned technical object, a pair of frames provided at predetermined intervals on both sides in a plate shape, and a work mechanism provided on a lower side of the frame, A quick coupler comprising a fixed hook for engaging or disengaging a coupling hook, a rotating hook which is pivoted at a predetermined angle on the other side of the lower side of the frame, and a hydraulic cylinder for operating the rotating hook between the fixed hook and the rotating hook, The coupler includes a coil spring fitted to the outer circumferential surface of the hydraulic cylinder to control the advancing and retracting operation of the hydraulic cylinder and preventing the hydraulic cylinder including the cylinder rod from escaping in the fixed hook direction.
According to any one of the above-mentioned objects of the present invention, there is provided a double safety structure in which a separate coil spring is provided in a hydraulic cylinder in addition to a check valve holding a hydraulic pressure in a hydraulic cylinder, It is possible to prevent the dislodgement.
Further, according to any one of the means for solving the problems of the present invention, by adopting a simple structure in which a coil spring is added to a narrow space in the quick coupler, the hydraulic pressure of the hydraulic cylinder is provided, It can be maintained continuously.
According to any one of the means for solving the problems of the present invention, energy is stored as the coil spring is compressed when the cylinder rod is retracted, and the oil pressure of the hydraulic cylinder is increased as the coil spring, So that the fastening speed of the rotating hook can be improved and the workability can be improved remarkably.
Further, according to any one of the means for solving the problems of the present invention, by adding the coil spring in the structure of the quick coupler made up of the check valve, the structural safety of the quick coupler can be improved and even if the hydraulic cylinder can not exhibit its function, It is possible to prevent human accidents that may occur in the future.
The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.
1 is a plan view of a quick coupler according to an embodiment of the present invention with one side frame removed.
2 is an enlarged view of a hydraulic cylinder of a quick coupler according to an embodiment of the present invention.
3 is a view showing a rotating hook, a link, and a fixing hook of the quick coupler according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
Throughout the specification, when a part is referred to as being "connected" to another part, it includes a case where it is "directly connected". Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.
First, let's explain the basic structure of the quick coupler.
1 is a plan view of a quick coupler according to an embodiment of the present invention with one side frame removed. Prior to describing the
1, a
On the other hand, the
In the
When the
Hereinafter, a quick coupler according to an embodiment of the present invention will be described in more detail.
As shown in FIG. 1, a frame hole (a) is formed on the upper end of the
A
2 is an enlarged view of a hydraulic cylinder of a quick coupler according to an embodiment of the present invention.
2, the
The
Meanwhile, the
The
The
In addition to preventing the
The
Meanwhile, the
3 is a view showing a rotating hook, a link, and a fixing hook of the quick coupler according to an embodiment of the present invention. 3, the
Such a
A
In order to withstand the force transmitted to the fixed
In the
In order to fasten the attachment using the thus formed
It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.
The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.
100: Quick coupler 10: Frame
11: Fixing hook 12: Rotating hook
13: Hydraulic cylinder 131: Cylinder body
132: Cylinder rod 133: Check valve
134: first engaging part 135: second engaging part
14: coil spring 15: link
Claims (5)
In the quick coupler,
And a coil spring fitted to the outer circumferential surface of the hydraulic cylinder to control the advancing and retracting operation of the hydraulic cylinder and preventing the hydraulic cylinder including the cylinder rod from escaping in the fixed hook direction, Quick coupler with safety device.
In the hydraulic cylinder,
A cylinder body having a pipe shape;
A cylinder rod that advances in the direction of the rotation hook from the cylinder body or retreats in the fixed hook direction to control rotation of the rotation hook;
A check valve built in the cylinder body to control oil leakage;
A first engaging portion which forms a diameter difference on the outer circumferential surface of the front end of the cylinder rod and blocks the advancement of the coil spring in the direction of the rotation hook; And
And a second engaging portion spaced apart from the first engaging portion by a predetermined distance to form a diameter difference on an outer circumferential surface of the cylinder body to prevent the coil spring from being retracted in the direction of the fixed hook,
Wherein the coil spring comprises:
And a second fastening portion for fastening the second fastening portion to the second fastening portion.
In the quick coupler,
Further comprising an auxiliary hook formed to be rotatable against the fixed hook, the auxiliary hook selectively fixing the work mechanism in cooperation with the fixing hook.
In the quick coupler,
And is rotated in a direction away from the fixed hook by being moved upward by the rotation hook which is rotated in accordance with the backward movement of the cylinder rod so as to rotate the auxiliary hook in a direction away from the fixed hook A double quick-attachment quick coupler for an excavator working tool, further comprising a link.
The link includes:
Wherein the rear end portion of the rear end portion is spaced apart from the front end by a predetermined distance, the front end portion of the rear end portion is wider toward the fixing hook, A quick coupler with a double safety device for an excavator working tool.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140172880A KR20160067458A (en) | 2014-12-04 | 2014-12-04 | Quick coupler for construction machinery having a safety device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140172880A KR20160067458A (en) | 2014-12-04 | 2014-12-04 | Quick coupler for construction machinery having a safety device |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20160067458A true KR20160067458A (en) | 2016-06-14 |
Family
ID=56191701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020140172880A KR20160067458A (en) | 2014-12-04 | 2014-12-04 | Quick coupler for construction machinery having a safety device |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20160067458A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102160658B1 (en) * | 2019-10-21 | 2020-09-28 | 주식회사 신길씨큐리티 | Barricade |
KR102213444B1 (en) * | 2020-12-07 | 2021-02-05 | 손태진 | Link for excavator with fall prevention means of attachment |
-
2014
- 2014-12-04 KR KR1020140172880A patent/KR20160067458A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102160658B1 (en) * | 2019-10-21 | 2020-09-28 | 주식회사 신길씨큐리티 | Barricade |
KR102213444B1 (en) * | 2020-12-07 | 2021-02-05 | 손태진 | Link for excavator with fall prevention means of attachment |
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