KR101737019B1

KR101737019B1 - Quick hitch coupler for backhoe bucket

Info

Publication number: KR101737019B1
Application number: KR1020150171466A
Authority: KR
Inventors: 유계희
Original assignee: (주)태성공업
Priority date: 2015-12-03
Filing date: 2015-12-03
Publication date: 2017-05-30

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick hitch for coupling an attachment such as a breaker or a bucket to an arm of a heavy equipment such as an excavator or the like, A body having an arm pin and a link pin fastening hole of a heavy equipment and having a plate spaced symmetrically opposite to each other so as to fasten the arm of the excavator and the push link pin of the link cylinder to the fastening hole; And a movable hook that locks / unlocks a pin hole for inserting the second attachment pin, the quick coupler comprising a fixed hook having a pin hole for holding and fixing a first attachment pin of the attachment, A hitch (21) formed by forming an opening hole (22) and a latch groove (23) on the other side, and a hitch A latch 31 for restricting the rotation of the hitch in contact with the latch groove 23 of the hitch 21 by being rotated by the external lever; And a second spring (34) for applying a resilient force to the hitch side with respect to the latch is coupled to the body.

Description

{Quick hitch coupler for backhoe bucket}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick hitch for coupling an attachment such as a breaker or a bucket to an arm of a heavy equipment such as an excavator or the like. More particularly, the present invention relates to a quick hitch for fastening and releasing an attachment pin, To a quick hitch coupler for a buckle bucket.

Heavy equipment used in construction, civil works, and various industrial fields, for example excavators, are used not only for bucket but also crushing and rebar cutting using crusher, rocks using breaker, It is possible to carry out various works while replacing various kinds of attachments according to the use such as concrete destruction work, grab and scraper and rock transportation work, clamshell bucket, Respectively.

Attachment is attached to the arm of the excavator so that it can be replaced with the purpose of the work. Recently, a separate quick hitch (coupler) was mounted on the arm of the excavator and various developments were made to easily attach and detach the attachment. And is widely used.

The quick hitch includes a body coupled with a heavy equipment arm such as an excavator, a push link, and a fastening pin. In order to fasten the pin of the attachment coupled to the lower end of the body, the quick hitch normally has one fixed hook, .

And is interposed between the arm of the heavy equipment and the attachment so that the attachment can be engaged or disengaged according to the fixing and releasing action of the movable hitch.

The function of the quick hitch as described above is the attachment and detachment of the attachment, but the structure is very various.

In general, the movable type of the hitch is known as a linear slide type and the rotary type, and the driving source for moving the hitch is classified into a cylinder type which is a hydraulic actuator and a spring type which uses a spring elasticity.

Most of the conventional quick couplers provide quick hitch drive using hydraulic cylinders. However, such prior art quick couplers have the advantage of being able to quickly and easily attach and detach attachments such as buckets and breakers to an excavator. However, hydraulic cylinders Therefore, there is a disadvantage in that it is structurally complicated and has a large number of component parts. As a result, there is a problem in that the cost associated with the manufacture of the quick coupler is increased. .

As an example, Korean Patent Registration No. 1422264 discloses a quick coupler body 100 connected to an arm of an excavator, a fixed hook 110 provided at one side of the quick coupler body and coupled to the first attachment pin 210, And a hitch 120 provided on the other side of the quick coupler body and connected to the rod of the hydraulic cylinder 130 and coupled with the second attachment pin 220 during the forward movement of the rod. And the arm pin 310 and the link pin 320 of the connector 300 are coupled to each other.

And a safety device for preventing an unlocking state of the fixed hook 110 and the first attachment pin 210 from being released at the same time. This is because when the hitch 120 rotates, the plate that protrudes and retracts from the upper side of the fixed hook 110 The first attachment pin 210 assembled in the fixing hook 110 is held in a restrained state and the plate 230 as the stabilizer is extended according to the extension of the hydraulic cylinder 130 So that the first attachment pin 210 is freely detached from the fixed hook 110.

The hitch is driven by a hydraulic cylinder, and the safety device for preventing the detachment of the attachment pin is configured to be attached to a protruding plate connected with a cable so as to be interlocked with the hydraulic cylinder, and there are various disadvantages of the type in which the hydraulic cylinder described above is added.

On the other hand, Korean Patent Registration No. 819469 is proposed to exclude the hydraulic cylinder and to operate the hitch by spring elasticity.

A fixed hook and a hitch for fixing the front pin and the rear pin of the attachment to each other and fixing the front pin and the rear pin of the attachment to the push link of the link cylinder through the arm pin of the excavator and the link link of the link cylinder through the link pin, A spring that is rotatable through a pin, one of which is fixed to one side of the body and the other of which is fixed to one side of the hitch so as to elastically push the hitch so as to maintain a fixed state of the rear pin on the hitch, .

However, since the hitch always applies elastic pressure in the direction of closing the attachment pin hole, it is necessary to press the heavy equipment and attach the external force to the attachment when the attachment is fastened. Therefore, the operation is troublesome As the external force is repeatedly applied, the life of the quick hitch is shortened and the risk of breakage is very high.

Particularly, there is a disadvantage in that it is difficult to remove the attached attachment and a separate hand tool such as a lever is forcedly inserted through the hitch.

In addition, since the spring elasticity and the load of the attachment are hooked on the hitch, the hitch has to be moved to the attraction force in the forced removal of the leverage, so that the separation operation is difficult and difficult.

KR 1422264 B1 KR 819469 B1 KR 1477694 B1 KR 1542226 B1 KR 1210833 B1 KR 1533841 B1 KR 10-1990-6387 B1 KR 1285073 B1 KR 1378569 B1 KR 1569593 B1 KR 1379302 B1 KR 10-2009-82409 A KR 10-2012-110113 A KR 10-2009-48151 A

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to solve the following problems.

The present invention provides a quick hitch coupler for a backhoe bucket which is capable of simplifying a hitch drive structure of a hydraulic cylinder type which causes a complicated structure and an increase in manufacturing costs, thereby reducing manufacturing costs and component costs.

The present invention forms a live lock assembly for restricting the lock position and the unlock position of the hitch for locking / unlocking the attachment pin to maintain the strong attachment of the attached attachment to improve the safety, The present invention provides a quick hitch coupler for a buckle bucket, which can easily remove an attachment by a handle that removes a hitch binding force.

According to an aspect of the present invention, there is provided an automotive vehicle comprising a body having an arm pin and a link pin fastening hole for a heavy equipment, the plate having opposite symmetrically spaced apart portions for fastening an arm of an excavator and a push link of a link cylinder to the fastening hole, And a movable hook formed on a lower portion of the body for locking / unlocking a pin hole for inserting the second attachment pin and a fixing hook having a pin hole for fixing and fixing the first attachment pin of the attachment, A live hook assembly formed by elastically coupling a first spring formed in a direction of releasing the lock of the hitch by forming a "U" -shaped opening hole and a latch groove on the other side; A latch for restricting the rotation of the hitch in contact with the latch groove and a second spring for applying a biasing force to the latch against the latch, The combined comprise a live lock assembly made.

The hitch of the live hook assembly is coupled to a pivot formed inwardly protruding from the body plate and the latch of the live lock assembly is coupled to a pivot protruding inwardly from the body plate.

The hitch and the latch are separated from each other on both sides of the plate, and are formed integrally on the coaxial shaft.

The lever assembly is coupled to the live lock assembly, and the lever assembly is guided by a guide hole formed at one side of the body plate to determine the position of the latch.

One end of the guide hole is formed to deeply form the fixing groove to provide a locking position of the lever assembly.

According to the present invention, since a driving element such as a hydraulic cylinder is omitted to simplify a hitch driving structure, it is possible to reduce a manufacturing cost and a component cost, and it is economical and can eliminate a fear of failure, , And a live lock assembly which regulates the lock position and the unlock position of the hitch which locks / unlocks the attachment pin is formed to maintain the strong attachment of the attached attachment to improve the safety. In case of separation, the live lock is released to remove the hitch binding force The attachment can be easily detached by the external lever and the spring which exerts an elastic force on the hitch in the release direction can be constituted so that the detachment can be performed even if a large force is not applied during the detachment and the detachment rotation of the hitch is regulated by a separate latch, There are several excellent Inventions will have the effect.

1 is a configuration diagram showing a conventional quick coupler.
FIG. 2 is a perspective view showing an assembled state external shape of the present invention. FIG.
3 is an exploded perspective view of the present invention;
4 is a longitudinal cross-sectional state view of the present invention.
5 is a state of use in which a heavy equipment and a bucket bucket are coupled through a coupler of the present invention.
FIG. 6 is an operational flowchart showing a coupling process of a backhoe bucket through the present invention. FIG.
7 is an operational flowchart illustrating a process of removing a bucket bucket according to the present invention.

Hereinafter, the technical idea of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4, the present invention is characterized in that the arm pin of the heavy equipment and the link pin fastening holes 12 and 13 are provided and the arm of the excavator and the push link pin of the link cylinder are mutually symmetrically spaced A fixing hook 14 having a pin hole formed at a lower portion of the body and for fastening and fixing the first attachment pin of the attachment and a pin hole for inserting the second attachment pin, And a latch hitch 23 is formed on the other side of the quick coupler so that the U-shaped opening hole 22 is formed on one side and the latch hitch 23 is formed on the other side. And a first spring (24) which is pulled in a direction to release the hitch from the hitch to the body, and a second hook (23) and restrains rotation of the hitch And a live lock assembly (3) comprising a tooth (31) and a second spring (34) for applying a resilient force to the hitch side with respect to the latch to the body.

A stop bar (26) is formed on one surface of the hitch (21) and a stop bar (15) crossing the plates (11, 11a) is formed to restrict rotation.

The hitch 21 of the live hook assembly 2 is coupled to a pivot 17 formed inwardly protruding from the body plate and the latch 31 of the live lock assembly 3 is separated from the upper portion of the hitch pivot 17 And is coupled to a pivot 18 formed inwardly protruding from the body plate.

The hitches 21 are integrally coupled to the plates 11 and 11a on both sides and coaxially and integrally joined by the link 25 and the plates 31 and 31a are provided on both sides of the plates 11 and 11a. And are integrally combined with each other by means of a link 35.

The lever assembly 4 is coupled to the live lock assembly 3 through a guide hole 16 having a fixing groove 16a having a deep hole at one end of the body plate 11a. So as to determine the position of the latch.

The lever assembly 4 includes a lever 41 extended to the outside of the body 1 and a fastening plate 42 coupled to an end of the lever. The fastening plate 42 is provided with bolt fastening holes 43, And a small width guide protrusion 44 is formed at one end of the fastening plate so as to penetrate the bolt fastening holes 43 and 43a and fasten the bolts to the surfaces of the plurality of latches 31. [

The bolt fastening hole 43a of the fastening plate 42 has a guide hole 44 that allows the guide protrusion 44 to be displaced toward the radial center of the rotation center so as to be guided by the guide hole 16, .

Reference numeral 19 denotes a hole drilled in a plate member welded between the plates 11 and 11a for fixing the other end of the second spring to be fixed thereto. Reference numeral 45 denotes a spring fastening protrusion for fixing the other end of the second spring. And a first spring (24) fastening hole formed at the lower end of the plate member connected across the first and second plates (11, 11a).

Hereinafter, the operation of the present invention constituting the above-described technical construction will be described in more detail.

5 to 7, the quick hitch coupler for a backhoe bucket of the present invention is used to attach and detach a backhoe bucket to a conventional heavy equipment boom.

5, the arm and the link pin of the excavator are coupled to and fastened to the fastening holes 12 and 13, respectively. Then, the fixing hook 14 and the live hook assembly (not shown) provided at the lower portion of the coupler body 1 2, the attachment pins are detached by using the hitches 21 of the first and second attachment members 2 and 3, and the required buckets are used.

6, when the first attachment pin is inserted into the fixed hook 14 as shown in FIG. 6, the second attachment pin is inserted into the U-shaped opening hole 22 of the live hook assembly 2, (See FIG. 6A). When the boom of the equipment is continuously moved downward, the upper portion of the 'U' shaped opening hole 22 is pushed up and the turning of the hitch 21 around the pivot 17 When the latch groove 23 of the hitch 21 comes into engagement with the end of the latch 31 of the live lock assembly 3, the latch 31 maintains the standing state by the elastic force of the second spring 34 And at the same time, the first spring 24 pulling the hitch 21 is locked in a stretched state (see Fig. 6B).

At this time, the end guide protrusion 44 of the fastening plate 42 of the lever assembly 4 fitted to the guide hole 16 of the plate 11a is guided by the guide hole and is inserted into the fixing groove 16a provided at the end thereof, And the force to hold the lever 41 in the fixed position is transmitted to the other bolt fastening hole 43 by the displacement of the bolt fastening hole 43a of the bolt fastening hole by the force of the second spring 34, As shown in Fig.

As a result, both the first and second attachment pins are in a fixed state. At this time, the second spring 34 pulls the latch 31 and the lever 41 to cause a contracting action. The first spring 24 is extended And acts to hold the latching position of the hitch 21 by applying elastic force.

When the attachment is completed as described above, the bucket is used for the construction, and when the attachment is to be replaced or removed, the operation as shown in FIG. 7 is performed.

When the lever 41 of the lever assembly 4 is disengaged by the driver, the lever is pulled out and the guide protrusion 44 recessed in the fixing groove 16a is disengaged, the above-described bolt fastening hole The lever 41 is released from the recessed position due to the clearance of the lever 43a, and the released lever 41 is rotated along the guide hole 16 (see Fig. 7A).

When the end of the latch 31 is disengaged from the latch groove 23 by releasing the guide hole 16 of the lever 41 to release the restraint of the hitch 21, The attachment pin coupled to the "U" -shaped opening hole 22 is first released and released. When the boom of the heavy equipment is lifted continuously, the other attachment pin inserted into the fixed hook 14 is also released, Separation is performed (see Fig. 7B).

The stop hole 26 of the hitch 21 at the completely separated position acts on the stop bar 15 fixed to the body to prevent rotation of the hitch unless a certain external force acts on the stop bar.

A plurality of the latches 31 and the hitches 21 are coupled to the pivots 17 and 18 of the plates 11 and 11a to firmly support the attachment pins and facilitate the assembling operation .

As a result, compared with the prior art in which a power source such as a hydraulic cylinder is connected by a hydraulic pipe, a coupler is formed in a simple manner, and a hitch rotation constraint It is possible to maintain a safe coupling state as long as the force of external releasing action is not applied at the same time as the coupling.

1: Body 2: Live Hook Assembly
3: Live lock assembly 4: Lever assembly
11, 11a: plate 12: arm pin fastening hole
13: Link pin fastening hole 14: Fixing hook
15; Stop bar 16: guide hole
16a: Fixing groove 17, 18: Pivot
21: Hitch 22: Opening hole
23: latch groove 24: first spring
25, 35: Link 26: Stop hole
31: latch 34: second spring
41: lever 43, 43a: bolt fastening hole
44: Guide protrusion

Claims

A body having an arm pin and a link pin fastening hole provided in the heavy equipment and having a plate spaced symmetrically and opposite to the fastening hole so as to fasten the arm of the excavator and the push link pin of the link cylinder; 1. A quick coupler comprising a fixed hook having a pin hole for fixing and fixing an attachment pin and a movable hitch for locking / unlocking a pin hole for inserting the second attachment pin,
(21) formed by forming a "U" -shaped opening hole (22) on one side and a latch groove (23) on the other side and a first spring A live hook assembly (2) formed by elastically coupling a body (24) to a body,
A latch 31 for restricting the rotation of the hitch in contact with the latch groove 23 of the hitch 21 and a second spring 34 for applying an elastic force to the latch against the latch, And a live lock assembly (3) formed by joining the first and second plates.

The method according to claim 1,
The hitch (21) of the live hook assembly (2) is joined to a pivot (17) formed inwardly protruding from the body plate,
Wherein the latch (31) of the live lock assembly (3) is coupled to a pivot (18) formed on the body plate so as to protrude inwardly from the upper portion of the hitch pivot (17).

The method of claim 2,
The hitches 21 are integrally joined to each other by a link 25 formed on a plurality of coaxially separated plates 11 and 11a provided on both sides,
Wherein the latch (31) is also integrally formed by a plurality of coaxially arranged plates (11, 11a) on both sides and is integrally connected by a link (35).

The method according to claim 1,
The lever assembly 4 is coupled to the live lock assembly 3 and the lever assembly 4 is guided by a guide hole 16 having a fixing groove 16a having a deep hole at one end of the plate 11a And the position of the latch is determined based on a position of the latch.

The method of claim 4,
The lever assembly 4 includes a lever 41 extended to the outside of the body 1 and a fastening plate 42 coupled to an end of the lever. The fastening plate 42 is provided with bolt fastening holes 43, 43a are formed in the fastening plate and a guide projection 44 is formed at one end of the fastening plate so as to penetrate the bolt fastening holes 43, 43a and fasten the bolts to the surfaces of the plural latches 31. [ Hitch coupler.

The method of claim 5,
The bolt fastening hole 43a of the fastening plate 42 has a guide hole 44 that allows the guide protrusion 44 to be displaced toward the radial center of the rotation center so as to be guided by the guide hole 16, Is provided to provide a quick hitch coupler for a bucket bucket.

The method according to claim 1,
Characterized in that a stop bar (26) is formed on one surface of the hitch (21) and a stop bar (15) crossing the plates (11, 11a) is formed to restrict rotation of the buckle bucket.