KR20140135042A - Secession prevention safety device it is the accessory machine of the excavator - Google Patents

Abstract

The present invention relates to a safety device for preventing detachment of accessory machine of an excavator. More specifically, the safety device prevents potential accidents caused by an accessory machine detaching from a clamp as a link body, which is connected to an arm of the excavator and composed of a clamp frame, and the clamp, which is installed to be rotated by a hydraulic cylinder in the link body, are released from a pin load of the accessory machine (a bucket or a braker) due to malfunctioning of the hydraulic cylinder and user′s mistakes, etc.

Description

TECHNICAL FIELD [0001] The present invention relates to a safety device for an excavator,

More particularly, the present invention relates to a linkage body connected to an excavator arm and formed as a clamp frame, and a clamp installed rotatably by a hydraulic cylinder in a link body, Which prevents the attachment tool from being disengaged from the clamp by releasing from the pin rod of the attached tool (bucket or breaker) due to the driver's mistake or the like, thereby preventing a safety accident in advance. .

Generally, an excavator is a construction machine used for digging the ground or crushing a strong ground such as a stone by attaching various attachment mechanisms such as a bucket or a breaker. Such an excavator is used for the above- Are attached to and detached from the link body made of a clamp frame at any time, and the attachment and detachment of such attaching mechanisms is possible by the clamp of the link body provided on the arm of the excavator.

On the other hand, the accessory mechanism that is detached from the clamp provided on the link body as described above may be a case where the accessory tool is detached from the link body by lifting the accessory mechanism or forgetting to operate the clamp by the hydraulic cylinder or by the driver for operating the clamp Safety accidents are frequent.

Accordingly, many means have been proposed in the past to solve the above problems.

Of these, Korean Utility Bulletin No. 199505247 entitled "Structure of an Attachment Mechanism for Attaching an Attachment Mechanism of an Excavator" refers to a structure of a hydraulic structure for easily attaching and detaching attachment tools (buckets or breakers) attached to an excavator link body A pin insertion groove for inserting one fixing pin of the attachment mechanism is formed on one side of the main body in a normal configuration. An inclined surface is formed on the other side portion, and a hook- And the other side fixing pin of the attaching mechanism is connected and fixed to the cylinder so as to be engaged and fixed. The above-mentioned operation period is operated in such a manner that the fixing pin is pulled so as to be connected to the side of the inclined surface.

However, the above-described structure of the coupling mechanism for engaging the attachment mechanism of the excavator has a disadvantage in that an attached tool or the like connected to the link body is detached due to a malfunction of the hydraulic cylinder, thereby causing a safety accident.

On the other hand, Korean Utility Model Publication No. 1997-58533, "Link for attaching an excavator attachment mechanism" is intended to solve a general problem of a link for attaching an excavator attachment mechanism. In order to increase the fixing force and secure the safety during use, it is desirable to prevent the safety accident caused by the detachment of the attaching mechanism during use, and to have a firm fixing force when the mechanism, that is, the bucket or the breaker, is installed.

That is, the above-mentioned "link for engaging the excavator attachment mechanism" has a bracket having a forwardly bolt-locked pivoting groove, the bolt being straight with a cylinder shaft having a fastening groove, So that it can not be detached from the link body.

However, in the above-mentioned "link for attaching an excavator attaching mechanism ", when the user attaches the attachment mechanism in the engagement groove, the user rotates the bracket as a hand so that the bracket supports the outer side of the connection pin, It is troublesome that the user must intermittently control the bracket.

Korean Utility Model Publication No. 1999-12125 "An excavator excavating tool changer" provides an excavator excavator changer capable of replacing a digging tool such as a bucket or a rock crushing tool used in an excavator more quickly and easily It has its purpose.

The above-mentioned "excavating machine tool changer apparatus" is characterized in that a pin support block having a semicircular groove which is in close contact with a circumferential surface of a first excavator side pivot provided on the excavating tool is installed at one end of the clamping frame, And a clamping frame which is rotatably mounted on the first clamp side pivot so as to be rotatably engaged with the clamp frame by a tube support pin, wherein a C- And the other end of the clamp is provided on the other end of the cylinder so as to be rotatable by the rod support pin while the second clamps whose center coincides with the first and second excavator pinholes formed on the arm of the excavator, Side pivot and a third clamp-side pivot.

However, in the above-mentioned "excavator excavating machine tool changer ", a digging tool such as a bucket or a rock crushing tool can be clamped or unclamped by using a fluid cylinder in a state where the excavator is installed on an arm of an excavator, There is a disadvantage that the pivot of the bucket is disengaged from the clamp due to the failure of operating the fluid cylinder in the cab and causing a safety accident.

On the other hand, Korean Utility Model Registration No. 343651 "Link apparatus for a fork-lift arm" relates to a link apparatus having a structure for increasing a coupling force with an attached equipment by providing a separate locking hook on a movable hook, will be.

That is, the "link apparatus of the fork-lift arm" has at least one through-hole formed in an edge portion including a part of a space formed by the hook of the movable hook, The locking hook is provided with a locking hook link shaft which is axially coupled with the link shaft of the movable hook in common, and a locking hook link shaft which is a rotation center when the piston rod of the hydraulic cylinder pushes or pulls the locking hook link shaft A locking hook extending in a direction opposite to the rotation axis and projecting outwardly through the through-hole; and a locking hook extending from the locking hook link shaft at least farther away from the locking hook link shaft with respect to the rotation axis, At least one spring groove formed on a surface of the movable hook opposite to the inner wall of the movable hook, In a direction away from the inner wall of the locking hook body will push the movable hook consists of at least one spring.

However, the above-mentioned "linking device of the fork-lift arm" has an advantage that the locking hook firmly holds the pin rod of the bucket. However, if the driver does not operate the hydraulic cylinder by mistake, Thus causing safety accidents.

And Korea Utility Model Registration No. 0223302 "Auto Clamp Safety Device for Excavator" is a semi-automatic safety system that is automatically shut off by movement of the pin (lock / unlock) by the safety device using the inner spring with the external hermetic type as a whole. It is easy to apply and operate as a device and various kinds of foreign matter (soil, dust, sand, cement, etc.) penetrate into the inside of the pin guide during operation of the excavator because there is no place where the pin guide and spring operation space surrounding the safety device are open to the outside The present invention provides an auto-clamping device for an excavator that can be used semi-permanently and safely.

The above-mentioned "auto-clamp safety device for an excavator" includes: a cylindrical pin guide serving as a body; a spring inserted in the pin guide; a safety pin mounted on a lower portion of the spring; A cover formed on an upper portion of the pin guide for facilitating the assembly of the safety device and the replacement of the safety pin and for preventing the release of the spring, and a cover formed on the cover for fixing the cover A fixing bolt inserted into one side of the pin guide so as to fix the height of the safety pin by being caught by the safety pin of the safety pin on the upper side of the safety pin; A fixing bolt pin for fixing the safety pin, and a fixing pin formed between the pin guide and the fixing bolt pin, It is configured to include a bolt inserted into the spring to prevent the fixing bolt is released from the beads.

However, in the above-mentioned " auto-clamp safety device for an excavator ", when a bucket is assembled, a driver descends from the excavator, the safety pin formed in the clamping device of the arm of the excavator is raised by hand, When the fixed bolt fixed is rotated in the reverse direction, the safety pin is lowered due to the elastic force of the spring, so that the bucket can be fixed. However, in order to attach and detach the bucket, the operator releases the bolt There are disadvantages because it operates the safety pin.

The above-described conventional techniques have an advantage that it is possible to easily replace an attached tool or an attached mechanism installed in an excavator, or to prevent an attached tool or the like from being separated from the clamp to some extent. However, There is an economical burden to replace the link body with the link body. In the conventional techniques, since the driver does not know that the attached tool is detached from the link body constituting the clamp frame, It was a big problem.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems and disadvantages of the prior art, and it is an object of the present invention to provide a clamping device, Which can prevent a safety accident from occurring due to an accessory mechanism which is detached from the link body, by preventing a collision of the vehicle with the link body.

It is a further object of the present invention to provide a signaling device that signals to the driver that the clamp is securely hooked or unclamped so that the excavator operator can see the signal before driving the excavator, It is an object of the present invention to provide a safety device for preventing deviation of an attachment of an excavator, which can prevent a safety accident from occurring by allowing the attachment mechanism to be detached from the main body in advance.

According to an aspect of the present invention, there is provided a clamping device comprising: a clamp which has a groove on an inner surface and is located inside both side walls of a clamp frame; a pin rotatably supporting the clamp on the clamp frame; And a link body which is operated by the hydraulic cylinder so that the clamp is hooked or unlocked by a first pin rod provided on an attachment tool of the excavator, The lesson; Rod moving means installed on an outer wall of the clamp frame outside the through-hole region to move the rod located in the through-hole back and forth so that the rod controls the reverse rotation of the clamp; Clamping state detecting means installed in an inner end region of the clamping frame for detecting a rotating state of the clamping means; And a bucket detachment detection sensor installed in the inner end region of the clamp frame for detecting a distance when the bucket is attached to and detached from the clamp and informing the driver of the detected distance. do.

Here, it is preferable that the rod moving means is any one of a hydraulic cylinder having a rod, a solenoid having a rod, and a pneumatic cylinder having a rod.

The clamp rotating state detecting means includes: a fixing plate fixed to an inner end area of the clamp frame; A rotary plate hingedly coupled to the fixed plate; A blocking shaft formed on the fixing plate to prevent a bottom rotation of the rotation plate; And the pin rod of the attached tool is engaged and disengaged by a buzzer installed in the excavator and a display lamp It is effective to include a signal transfer switch for signaling any one of them.

According to the present invention as described above, the operator operates the switch in the driver's seat to prevent the clamp from rotating arbitrarily by operating the rod, thereby preventing the clamp from being broken due to the malfunction of the clamp provided on the link body made of the clamp frame, It is possible to prevent a safety accident by preventing the detachment of the accessory mechanism in advance and in particular to inform the driver that the accessory mechanism is securely caught or released from the clamp so that the driver can know the clamp before operating the excavator, It is possible to prevent the attachment mechanism from being detached from the link body constituting the frame in advance, thereby preventing a safety accident due to disengagement of the attachment mechanism in advance.

1 is a perspective view showing a bucket according to the present invention and a link body,
Fig. 2 is a side view of the link body according to Fig. 1,
FIG. 3 is a side view showing a state where the clamp according to the present invention is unclamped from the first pin rod;
Fig. 4 is a side view showing a state in which the clamp is clamping the first pin rod in the state of Fig. 3,
5 is a perspective view of the clamping state detecting means according to the present invention,
Figure 6 is a side view according to Figure 5;

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

FIG. 1 is a perspective view showing a bucket according to the present invention and a link body separated from each other, and FIG. 2 is a side view of the link body according to FIG.

As can be seen from these drawings, the safety device for securing the deviation of the attachment of the excavator according to the present invention comprises a clamp 10 having a groove 2 on the inner surface and located inside the both side walls of the front end of the clamp frame 3, A pin 4 that rotatably supports the clamp 10 on the clamp frame 3, a hydraulic cylinder 5 provided inside the clamp frame 3 to rotate the clamp 10, a hydraulic cylinder 5, Through holes 20 are formed in both side wall front end regions of the clamp frame 3 of the link body 1 in which the clamp 10 is engaged or disengaged with the first pin rod 6 provided in the accessory mechanism of the excavator Respectively.

FIG. 3 is a side view showing a state where the clamp according to the present invention is unclamped by the first pin rod, and FIG. 4 is a side view showing a state where the clamp clamps the first pin rod in the state of FIG.

As shown in these drawings, the rod moving means 30 having the rod 31 is provided on the outer wall of the clamp frame 3 outside the region of the through hole 20, so that the rod 31 is inserted into the through hole 20 are moved forward and backward by the rod moving means 30 to come into contact with and release the contact with the rear surface of the clamp 10 of the clamp 10 so that the reverse rotation of the clamp 10 can be interrupted. Here, reference numeral 7 denotes a second pin rod mounted on the bucket 8, and the second pin rod 7 is engaged with the second pin rod engaging groove 9 of the link body 1. [ Here, the rod moving means 30 is selected from a hydraulic cylinder 32 having a rod 31, a solenoid having a rod, and a pneumatic cylinder having a rod.

FIG. 5 is a perspective view of the clamping state detecting means according to the present invention, and FIG. 6 is a side view according to FIG.

As can be seen from these figures, the clamping pivot detection means 40 is provided in the inner end region of the clamp frame 3 to detect the pivoting state of the clamp 10. The clamping pivot detection means 40 has a fixing plate 41 fixed to the inner end region of the clamp frame 3, a rotary plate 42 hinged to be rotatable by the fixing plate 41, and a rotary plate 41 A clamping shaft 43 for preventing the lower rotation of the clamping frame 3 and the clamping frame 3 are provided so as to be operated by the contact between the rotary plate 41 and the first pin rod 6, And a signal transfer switch 44 for signaling a state in which the pin rod 6 is caught and released from the clamp 10 by a buzzer or an indicator lamp (not shown) installed in the excavator.

In the present invention, a bucket detachment / detachment detection sensor (50) is installed in the inner end area of the clamp frame (3) to detect the distance when the bucket (8) is attached to the clamp (10) It is possible to play a role.

In the present invention as described above, when the driver tries to engage the bucket 8, which is the attachment device, with the link body 1 through the driving operation by climbing the excavator, the link body is lowered to the second pin rod 7 of the bucket 8 The clamp 10 is operated to clamp the first pin rod 6 provided on the bucket 8 by simultaneously engaging the second pin rod engaging groove 9 of the link body 1 and operating the clamp 10 simultaneously.

When the clamp 10 clamps the first pin rod 6 and the first pin rod 6 pushes the contact rotary plate 42 backward to the rotary plate 42 as the clamp rotary state detection means 40, The copper plate 42 operates the signal transfer switch 44 to securely fasten the first rod 6 of the bucket 8 by means of the clamp 10 to signal the bucket 8 that the bucket 8 can not be disengaged by a buzzer Signal, the operator knows the fact and lifts the bucket (8), which is a fitting, to perform a safe operation.

On the other hand, if the first pin rod 6 of the bucket 8 is not clamped to the clamp 10 due to the failure of the clamp 10 to operate, the rotary plate 42, which is the clamp rotating state detecting means 40, The signal transfer switch 44 transmits a signal indicating that the clamp 10 should not be disconnected from the first pin rod 6 and transmits a signal to a selected one of a buzzer and an indicator on the excavator, After confirming the state of the bucket (8) and the clamp (10) which are attached to each other, it is possible to perform a safe operation by operating again after confirming the safe binding by driving operation again.

When the clamp 10 clamps the first rod pin 6 of the bucket 8, the driver operates the load moving means 30 provided on the outer wall of the clamp frame 3 outside the region of the through hole 20 The rod 31 is brought into contact with the rear surface of the clamp 10 inside the through hole 20 to prevent the bucket 8 from being clamped off to a physical force or the like during operation.

The present invention can also detect the clamped state of the first pin rod 8 of the bucket 8 by the clamp rotating state detecting means 40, The bucket detachment detection sensor 50 senses the position of the first pin rod 6 of the bucket 8 and informs the driver of the sensed signal so that the bucket 8 is attached to the clamp 10 provided on the link body 1 You can re-verify that it is securely clamped.

In the present invention as described above, the operator operates the switch in the driver's seat to prevent the clamp from rotating arbitrarily by operating the rod, thereby preventing the clamp from being mounted on the link body and the screw of the excavator In order to prevent a safety accident by preventing the tool from being separated from and separated from the tool, the operator informs the driver that the tool is securely caught or released from the clamp, The detachment of the accessory mechanism from the main body can be prevented in advance, so that the safety accident due to the detachment of the accessory mechanism can be prevented in advance.

As used herein, the terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor shall properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely one preferred embodiment of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

1: Link body
2: Home
3: Clamp frame
4: pin
5: Hydraulic cylinder
6: first pin rod
7: second pin rod
8: Bucket
9: Second pin load catch groove
10: Clamp
20: Through hole
30: load transfer means
31: Load
40: clamping state detection means
41: Fixed plate
42: Rotary plate
43: Jersey axis
44: Signal transfer switch
50: bucket detachment sensor

Claims (3)

A clamp which is provided on the inner side of the clamp frame and has a groove on its inner surface and which is located inside both side walls of the clamp frame; a pin rotatably supporting the clamp on the clamp frame; a hydraulic cylinder provided inside the clamp frame to rotate the clamp; A link body which is operated by a hydraulic cylinder so that the clamp is engaged or disengaged with a first pin rod provided in an accessory mechanism of an excavator,
Through holes formed in both side wall end regions of the clamp frame;
Rod moving means installed on an outer wall of the clamp frame outside the through-hole region to move the rod located in the through-hole back and forth so that the rod controls the reverse rotation of the clamp;
Clamping state detecting means installed in an inner end region of the clamping frame for detecting a rotating state of the clamping means;
And a bucket detachment detection sensor installed in an inner end area of the clamp frame for detecting a distance when the bucket is detached and attached to the clamp and informing the driver of the distance. The method according to claim 1,
Wherein the rod moving means is any one of a hydraulic cylinder having a rod and a solenoid having a rod and a pneumatic cylinder having a rod. The method according to claim 1,
The clamp rotating state detecting means includes: a fixing plate fixed to an inner end area of the clamp frame;
A rotary plate hingedly coupled to the fixed plate;
A blocking shaft formed on the fixing plate to prevent a bottom rotation of the rotation plate;
And the pin rod of the accessory mechanism is engaged and disengaged from the clamp by a buzzer installed in the excavator and a display lamp And a signal transfer switch for signaling any one of them.

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