KR20140132224A

KR20140132224A - Hydraulic breaker having absorbing shock member

Info

Publication number: KR20140132224A
Application number: KR1020130051485A
Authority: KR
Inventors: 윤여송
Original assignee: 주식회사 한국엠엘
Priority date: 2013-05-07
Filing date: 2013-05-07
Publication date: 2014-11-17

Abstract

Disclosed is a hydraulic breaker having a straight reciprocating sliding chisel by being linked with a straight reciprocating sliding piston along a cylinder. The disclosed hydraulic breaker comprises: a first buffer member formed on one end of the piston facing a head unit of the chisel and generating the magnetic force; and a second buffer member made of the same material with the first member on the head unit of the chisel, wherein same stimulation is magnetized to a side where the first buffer member and the second buffer member face each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic breaker having a shock absorbing member,

The present invention relates to a hydraulic breaker, and more particularly, to an industrial hydraulic breaker for crushing concrete or rock.

Generally, a hydraulic breaker is widely used as a device for crushing concrete or rock. This hydraulic breaker is mainly used in construction machines such as excavators and loaders. In the case of hand breakers, the hydraulic breakers are used while being held by the operator.

1, a conventional hydraulic breaker 1 is provided with a chisel 7 disposed at the lower end of the piston 5 as the piston 5 in the cylinder 3 repeats reciprocating up and down movement by hydraulic pressure Hit. In this case, the chisel 7 reciprocates forward and backward due to repetitive hitting of the piston 5, and hits and crushes concrete or rock.

In this case, the crushing force of the chisel 7 is controlled by a change in the hydraulic pressure flowing into the cylinder 3 and a change in the pressure of the high pressure gas (for example, The lower end portion 5a of the piston 5 repeatedly hits the head portion 7a of the chisel 7 through the process of repeatedly raising and lowering the piston 5 according to the change of the pressure of the nitrogen gas do.

However, in the conventional hydraulic breaker, during operation, the lower end portion 5a of the piston 5 and the head portion 7a of the chisel 7 are repeatedly collided. By this collision, the piston 5 and the chisel 7, Each breakdown was inevitable.

Announcement Patent Publication No. 1996-0006735 (Publication Date: Apr. 28, 1997)

In order to solve the above problem, the present invention provides a hydraulic breaker for reciprocating a chisel by transferring kinetic energy in a state where the piston does not hit the chisel or the impact force is minimized in a region where the piston and the chisel collide, The purpose is to provide.

In order to achieve the above object, the present invention provides a hydraulic breaker comprising a chisel reciprocating linearly reciprocally in a reciprocating linear reciprocating motion along a cylinder, wherein the piston has an end opposite to the head of the chisel And a second buffer member made of the same material as the first member on the head portion, wherein the first buffer member and the second buffer member are opposed to each other And the same irregularities are magnetized on both sides.

The first cushioning member and the second cushioning member may each be formed of a superconducting magnet.

In this case, it is preferable that the first cushioning member has a closed loop shape surrounding one end of the piston, and the second cushioning member has a closed loop shape surrounding the head portion of the chisel.

At this time, the first cushioning member may protrude further toward the head side of the chisel than the one end of the piston, or the second cushioning member may protrude further toward the one end side of the piston than the head of the chisel.

The first cushioning member and the second cushioning member may each be made of a permanent magnet.

In this case, it is preferable that the first cushioning member and the second cushioning member are fixed to one end of the piston and the head portion of the chisel so as to face each other.

Further, it is of course possible that the first buffer member and the second buffer member are made of electromagnets, respectively.

Further, the present invention further includes a detection sensor for detecting the reciprocating movement of the piston, and when the upper end of the piston is sensed by the detection sensor, a current applied to the first buffer member and the second buffer member is cut off And if not, current may be applied to the first buffer member and the second buffer member.

As described above, in the present invention, as described above, in the present invention, there is an advantage that the collision between the piston and the chisel can be avoided or the impact force between the piston and the chisel can be greatly reduced during reciprocation of the piston, thereby minimizing damage to the piston and the chisel.

1 is a partially cutaway perspective view showing a conventional hydraulic breaker.
2 is a schematic view showing a hydraulic breaker according to a first embodiment of the present invention.
3 is a schematic view showing a hydraulic breaker according to a second embodiment of the present invention.
4 is a schematic view showing a hydraulic breaker according to a third embodiment of the present invention.
5 is a schematic view showing a state in which the detection sensor is applied to the hydraulic breaker according to the third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments described below are provided for illustrative purposes only, and that the present invention may be embodied with various modifications and alterations. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. In addition, the attached drawings are not drawn to scale in order to facilitate understanding of the invention, but the dimensions of some of the components may be exaggerated.

First, the structure of the hydraulic breaker according to the first embodiment of the present invention will be described with reference to FIG.

1, the hydraulic breaker according to the first embodiment of the present invention includes a cylinder 10, and a piston 5 reciprocating back and forth in the cylinder 10 is disposed by hydraulic pressure. Below the piston 5, a chisel 7 which is struck by the piston 5 is disposed.

The hydraulic breaker according to the first embodiment of the present invention includes first and second cushioning members 110 and 120, each of which is formed of a superconducting magnet. Superconducting magnets are electromagnets made using coils wound in superconducting coils.

The first and second cushioning members 110 and 120 are disposed at the lower end 5a of the piston 5 and are fixed to the head 7a of the chisel 7. The first and second cushioning members 110 and 120 are formed in a closed loop shape (for example, a ring shape) surrounding the lower end portion 5a of the piston 5 and the head portion 7a of the chisel 7 .

The first and second cushioning members 110 and 120 have the same stimulation on the opposite sides of the piston 5 due to a power source applied thereto during driving of the piston 5.

When the piston 5 descends and the lower end portion 5a of the piston 5 is adjacent to the head portion 7a of the chisel 7 when the crushing operation is performed through the hydraulic breaker, The second cushioning members 110 and 120 prevent the lower end 5a of the piston 5 and the head 7a of the chisel 7 from colliding with each other. At this time, due to the repulsive force generated between the first and second cushioning members 110 and 120, the chisel 7 can descend and strike the object to be crushed (such as a rock).

Accordingly, when the upward and downward reciprocating motion of the piston 5 is repeated, the chisel 7 does not collide with the piston 5 but can continuously strike and crush the object to be crushed.

In this case, as the magnetic field strength of the first and second cushioning members 110 and 120 becomes smaller, the piston 5 and the chisel 7 may collide with each other. However, since the impact force is insignificant, And the breakage of the collision portion between the chisels 7 is significantly lower than that of the conventional hydraulic breaker.

On the other hand, when the intensity of the magnetic field between the first and second cushioning members 100 and 120 is increased, the first cushioning member 110 can be disposed so that its tip end protrudes more than the lower end 5a of the piston 5, The cushioning member 120 may be arranged so as to protrude more than the head portion 7a of the chisel 7.

Referring to FIG. 3, in the hydraulic breaker according to the second embodiment of the present invention, the first and second cushioning members 210 and 220 are each made of a permanent magnet.

The first cushioning member 210 is fixedly coupled to the end of the lower end 5a of the piston 5 and the second cushioning member 220 is fixed to the head portion of the chisel 7 in correspondence with the first cushioning member 210 7a). The first and second cushioning members 210 and 220 are disposed such that the faces of the first and second cushioning members 210 and 220 have the same polarity.

The crushing operation can be performed using the chisel 7 while avoiding collision between the piston 5 and the chisel 7 during the reciprocating motion of the piston 5. [

Referring to FIG. 4, in the hydraulic breaker according to the third embodiment of the present invention, the first and second cushioning members 310 and 320 are formed of electromagnets, respectively.

The first cushioning member 310 includes a yoke 311 coupled to the lower end 5a of the piston 5 and coupled to the yoke 311. When the current is applied to the coil 311, the first buffer member 310 forms a magnetic field of N pole or S pole.

The second buffer member 320 includes a yoke 321 which surrounds the head 7a of the chisel 7 and a coil 323 wound around the yoke 321. When the current is applied to the coil 323 as in the first buffer member 310, the second buffer member 320 forms a magnetic field of an N pole or an S pole. In this case, it is preferable that the second buffer member 320 forms the same magnetic pole as that of the first buffer member 310 so that repulsive force acts on the first buffer member 310.

In the third embodiment, current is continuously applied to the coils 313 and 323 of the first and second buffer members 310 and 320 during the operation of the hydraulic breaker so that the same stimulus is formed in each of the buffer members 310 and 320.

5, the third embodiment can dispose the detection sensor 340 on the head 9 of the cylinder 3 to detect the upper end 5b of the piston 5 during the hydraulic breaker operation.

The detection sensor 340 detects the piston 5 when the upper end 5b of the piston 5 is lifted up and down in reciprocating motion of the piston 5 and transmits the detection signal to the control unit (not shown). The control unit cuts off the current to be applied to the coils 313 and 323 of the first and second buffer members 310 and 320 according to the detection signal and applies the current to the coils 313 and 323 when there is no detection signal.

Accordingly, the first and second cushioning members 310 and 320 are continuously provided with the first and second cushioning members 310 and 320 as the magnetic field of the same magnetic pole is formed only when the piston 5 and the chisel 7 are adjacent to each other The power consumption can be reduced as compared with the case where the current is applied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

5: Piston 7: Chisel
110, 210, 310: first buffer member 120, 220, 320: second buffer member
311, 321: yoke 313, 323: coil
340: sensor

Claims

1. A hydraulic breaker comprising a chisel which reciprocates linearly reciprocally with a piston reciprocally reciprocating along a cylinder,
A first buffer member for generating a magnetic force is coupled to one end of the piston facing the head of the chisel,
Wherein the chisel includes a second buffer member made of the same material as the first member on the head,
Wherein the first cushioning member and the second cushioning member are magnetized in the same direction on opposite sides of the first cushioning member and the second cushioning member.

The method according to claim 1,
Wherein the first cushioning member and the second cushioning member are made of superconducting magnets, respectively.

3. The method of claim 2,
Wherein the first buffer member is in the form of a closed loop surrounding one end of the piston,
Wherein the second cushioning member is formed in a closed loop shape surrounding the head portion of the chisel.

The method of claim 3,
The first cushioning member further projects toward the head side of the chisel than the one end of the piston,
Wherein the second cushioning member further projects toward the one end side of the piston than the head portion of the chisel.

The method according to claim 1,
Wherein the first cushioning member and the second cushioning member are permanent magnets, respectively.

6. The method of claim 5,
Wherein the first cushioning member and the second cushioning member are fixedly disposed at one end of the piston and the head portion of the chisel so as to face each other.

The method according to claim 1,
Wherein the first buffer member and the second buffer member are made of electromagnets, respectively.

8. The method of claim 7,
Further comprising a detection sensor for detecting reciprocal movement of the piston,
When the upper end portion of the piston is sensed by the detection sensor, the current applied to the first buffer member and the second buffer member is cut off, and if not detected, the current is applied to the first buffer member and the second buffer member Features a hydraulic breaker.