KR20160073240A

KR20160073240A - Hydraulic breaker

Info

Publication number: KR20160073240A
Application number: KR1020140181798A
Authority: KR
Inventors: 박정열
Original assignee: (주) 대동이엔지; 박정열
Priority date: 2014-12-16
Filing date: 2014-12-16
Publication date: 2016-06-24

Abstract

A hydraulic breaker according to the present invention includes a breaker housing, a cylinder unit installed on the breaker housing so as to be movable up and down, and having a chisel on a lower side thereof, and a cylinder unit provided between the cylinder unit and the breaker housing, And a buffer support unit for supporting the cylinder housing and preventing the vibration generated from the cylinder housing from being transmitted to the breaker housing, wherein the buffer support unit is provided with a rotary unit for rotatably supporting the cylinder unit or the breaker housing, And the first and second connecting members rotatably connected to the upper and lower sides of the rotating member and the breaker housing or the cylinder unit so as to be able to support the cylinder unit relative to the breaker housing, The rotating member Compensating for the first and second engagement position change of the connecting member and the cylinder unit in accordance with open and vibration, the vibration by absorbing a reaction force acting on the chisel can be prevented from being transmitted to the breaker housings.

Description

{Hydraulic breaker}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic breaker, and more particularly, to an improved hydraulic shock absorber capable of preventing vibration from being transmitted to a boom and a vehicle body of an excavator.

In general, an excavator, which is one of various heavy equipments used in a construction site or a civil engineering worksite, performs a variety of work by attaching attachments such as a bucket, a breaker, a nipper, and a vibration bucket to a boom.

Particularly, a hydraulic breaker which is operated by a power source such as hydraulic pressure to crush the crushed material, form a hole in the ground, perform excavation of a groove, and the like is a hydraulic type and a pneumatic type according to a working fluid.

The hydraulic breaker differs from the pneumatic breaker in that the hydraulic oil is a driving method of using the hydraulic oil as a transmission medium of energy. The hydraulic breaker receives the oil from the main pump and operates the hydraulic hammer, and the hammer (piston) hits the chisel. This is because Pascal's law is used to obtain a large force. The principle of this Pascal is that if the pressure of one point of a fluid stopping in a closed container is increased by a certain amount, And the size of the

In the case of such a hydraulic type, a large force can be obtained, and a wide range of continuously variable shifting is easy, and controllability and bufferability are good.

However, in the conventional hydraulic breaker, vibrations and strikes are transmitted to the boom through the hydraulic breaker during operation, the vibration transmitted to the boom is transmitted to the vehicle body, and further, the excavator is damaged.

Korean Patent Registration No. 0967914 discloses a hydraulic breaker having a public impact cushioning structure, and Korean Patent Registration No. 1359322 discloses an anti-vibration device for a hydraulic breaker. The vibration damping device disclosed in the publication is provided with a vibration damping device between the bracket and the main body to alleviate the shock, but since it absorbs the shock using the material characteristics of the damping member, the damping effect can not be expected.

Korean Patent No. 090974 discloses a buffer structure for a hydraulic breaker, Korean Patent No. 655226 discloses a hydraulic type impact device having a hydraulic rebound absorption structure, and Patent No. 870984 discloses a vibration damping device for a hydraulic breaker It is posted.

Korean Patent Registration No. 090974. Korean Patent No. 655226. Korean Patent Registration No. 870984.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic breaker in which vibration transmitted from a main body of a hydraulic breaker can be minimized in transmission of a boom of a housing and an excavator.

Another object of the present invention is to provide a hydraulic breaker wherein the amplitude of the hydraulic breaker body can be maintained uniformly regardless of the vibration intensity of the vibration generating unit.

According to an aspect of the present invention, there is provided a hydraulic breaker comprising a breaker housing, a cylinder unit movably installed in the breaker housing in a vertical direction and having a chisel on a lower side thereof, And a buffer supporting unit installed to support the cylinder unit provided with the chisel to the cylinder housing and to prevent the vibration generated from the cylinder housing from being transmitted to the breaker housing,

The shock absorber supporting unit may include a cylinder unit or a rotatable member for rotatably supporting the cylinder unit. The upper and lower sides and the breaker housing or the cylinder unit may be rotatable about the center of rotation of the rotary member so as to support the cylinder unit with respect to the breaker housing And the first and second connecting members are connected to each other to compensate for the change in the engagement position of the first and second connecting members and the cylinder unit due to the rotation of the rotary member when the cylinder unit vibrates with respect to the breaker housing. .

Alternatively, the hydraulic breaker for solving the above technical problem is characterized in that the rotary member is installed to the oscillator so as to be rotatable in the direction perpendicular to the oscillation direction, and the upper and lower sides of the rotation center of the rotary member and the breaker housing are rotatably connected, And the first and second connecting members for supporting the body in a vertical direction with respect to the breaker housing in a vibratable manner.

In the present invention, the buffer support unit may be installed on the upper and lower portions of the cylinder unit and the breaker housing, respectively. And a rotation link rotatably installed at both ends between the cylinder unit on the lower side of the cushioning support unit and the breaker housing.

The hydraulic breaker of the present invention can be suspended to allow the vibration of the cylinder unit to be made in one direction so that the vibration of the cylinder unit can improve the vibration quality of the cylinder unit due to the hydraulic pressure and the vibration of the hydraulic breaker, It is possible to prevent the reaction force generated when the crushing and the holes are formed from being transmitted to the boom of the excavator. As a result, the excavating equipment can be protected from vibration and the working efficiency by the hydraulic breaker can be increased.

1 is a perspective view showing a hydraulic breaker according to the present invention,
2 is a side view of the hydraulic breaker according to the present invention, showing the operating state thereof.
3 and 4 are side views showing a state where a connecting member is installed on a rotating member of the hydraulic breaker,
5 is a front view showing another embodiment of the hydraulic breaker according to the present invention.
6 is a front view showing another embodiment of the hydraulic breaker according to the present invention.

1 to 6 show an embodiment of the hydraulic breaker according to the present invention.

Referring to the drawings, the hydraulic breaker 10 includes a breaker housing 20 having a vibration space 21 penetrating in the longitudinal direction, and a movable breaker housing 20 movably installed in the vibration space 21 of the breaker housing 20 A cylinder unit 30 provided with a chisel 40 on the lower side and a cylinder unit 30 provided between the cylinder unit 30 and the breaker housing 20 and provided with a chisel 40 are installed in the breaker housing 20, And a buffer support unit 50 for attenuating transmission of vibration to the breaker housing 20 side.

On the upper side of the breaker housing 20, there is formed a support bracket part 22 which is coupled with operating equipment (a coupler (not shown) installed on a boom of an excavator). The vibration space 21 formed in the breaker housing 20 is formed such that the cylinder unit 30 is positioned and can be vibrated in the vertical direction.

Although the cylinder unit 30 is not illustrated in detail in the drawing, the piston is provided so as to reciprocate vertically by the compressive force of the hydraulic pressure, and has a structure capable of striking the chisel 40 strongly when the piston is lowered. The chisel 40 receives the continuous hitting force by the piston in a state of being compressed on the surface of the object (for example, rock) to be crushed, and transmits the destructive force to the object.

The cushioning support unit 50 can support the cylinder unit 30 so that the cylinder unit 30 can vibrate with respect to the breaker housing 30. The cylinder unit 30 is provided with rotary members 51 and 52 on upper and lower sides, And one end portion is rotatably provided on the upper and lower sides of the rotation center of the rotary members 51 and 52 so as to be shifted from the rotation center of the rotary members 51 and 52, And first and second connecting members 60 and 70 having end portions rotatably installed.

Each of the rotary members 51 and 52 may be installed in a direction perpendicular to the vibration direction of the cylinder unit 30. The rotary members 51 and 52 may be installed on the vertical axis of the upper and lower portions of the breaker housing 20. The rotary members 51 and 52 may penetrate the cylinder unit 30 and have both ends protruding from both sides and may be supported by bearings so that normal and reverse rotation can be smoothly performed with respect to the cylinder unit 30. [

In this case, the centers of the rotating members 51 and 52 may be formed on the same horizontal axis line direction. In this case, As shown in Fig. The rotary member 51 positioned on the upper side may be installed in a separate bracket (not shown) formed on the upper side of the cylinder unit 30. [

The rotating members 51 and 52 are not limited to those provided in the cylinder unit 30 but are provided with rotating members 51 and 52 in the breaker housing 20 corresponding to the cylinder housing, 51) 52 and the cylinder unit 30 can be supported by the first and second connecting members 60, 70.

The amplitude of the cylinder unit 30 is determined by the first and second connecting members 60 and 70 connected to the upper side and the lower side of the horizontal line by the hinge axis with reference to the center of rotation of the rotary members 51 and 52, As shown in FIG. That is, the vibration width of the vibrating body increases as the distance from the center of rotation of the first and second connecting members 60, 70 and the rotating members 51, 52 increases.

1 to 3, the other end of the first and second connecting members is connected to the breaker housing 30, and the other end of the first and second connecting members 60 and 70 of the buffer support unit 50 The first and second connection members 60 and 70 may be installed to be able to maintain a horizontal state. 4, the connecting portion of the first connecting member by the hinge shaft of the breaker housing 30 is positioned below the connecting portion of the rotating members 51 and 52, and the connecting member of the second connecting member 70, The connecting portion of the breaker housing 20 by the hinge shaft is located below the rotation center of the rotary members 51 and 52 by the hinge axis.

The lengths of the first and second connection members 60 and 70 are not the same and the rotation angle of the rotation members 51 and 52 and the rotation angle of the first and second connection members 60 and 70 The positions of the hinges may be different from each other. When the first and second connecting members 60 and 70 are formed to be different from each other, the vibrating body can be vibrated up and down along the vertical axis.

5 shows another embodiment of the hydraulic breaker according to the present invention. In the above embodiments, the same components denote the same reference numerals.

As shown in the figure, the hydraulic breaker has a buffer support unit 50 for supporting and supporting the cylinder unit 30 on the breaker housing 20, one on the upper side of the cylinder unit 30 and the breaker housing 20, And a connecting link 55 for connecting the lower portion of the cylinder unit 30 and the breaker housing 20 is installed on the lower side. Both ends of the connecting link 55 are rotatably installed on one side of the breaker housing 20 and the cylinder unit 30, respectively. The rotary buffer support unit 50 is provided with the rotary member 51 in the cylinder unit 30 or the breaker housing 20 as in the above embodiment and the rotary member and the breaker housing or the cylinder unit 30 are provided in the first , And two connecting members (60) and (70).

The connecting portion connected by the hinge axis of the connecting link 55 and the cylinder unit 30 rotatably supports the center of the rotating member 51 in the vertical direction It may not be located on the line.

At least one anti-vibration member, that is, first, second and third anti-vibration members 80, 81 and 82 may be installed between the cylinder unit 30 and the breaker housing 20. A plurality of the first and second anti-vibration members 80 and 81 may be provided between the side of the cylinder unit 30 and the opposite side of the breaker housing 30. A third anti-vibration member 82 may be provided on the upper surface of the cylinder unit 30 and the inner surface of the breaker housing 30 facing the lower surface of the cylinder unit 30 to elastically bias the cylinder unit 30 downward.

The first, second and third anti-vibration members 80, 81 and 82 may be made of an elastic rubber material or an elastic material such as an elastic spring. However, the present invention is not limited thereto. The first, second and third anti-vibration members 80, 82 may provide a restoring force for vibration when the cylinder unit 30 vibrates at a predetermined width.

Meanwhile, FIG. 6 shows another embodiment of the hydraulic breaker using the length compensating member according to the present invention. The same reference numerals as those in the above-mentioned embodiments indicate the same components.

A buffer supporting unit 50 for supporting a rotating support for supporting the cylinder unit 30 with respect to the breaker housing 30 is provided in the breaker housing 20 or the cylinder unit 30 with two rotary members 51 And the breaker housing 20 is connected by the first connecting member 60 and the other rotating member 52 is connected to the other rotating member 51 And the breaker housing 20 are connected to each other by the second connecting member 60. The first and second connecting members 60 and 70 may be installed in the first and second rotating members 51 and 52 as in the above embodiments, (52) The tuning coupling member 90 may further be provided to be rotatable with respect to the breaker housing 20 in the same direction when the cylinder unit 30 vibrates.

The operation of the hydraulic breaker according to the present invention constructed as described above will be described as follows.

The piston in the cylinder unit 30 is lifted and lowered by the oil pressure supplied from the excavator in a state where the breaker is mounted on the boom of the excavator boom so as to strike the chisel 40. The impact applied to the chisel 40 is broken, Excavation, and holes. In this process, when the cylinder unit 30 moves upward with respect to the breaker housing 20, the rotary members 51 and 52 installed on the upper and lower sides of the cylinder unit 30 rotate (see FIG. 2) The length variation due to the rotation of the ends of the first and second connecting members 60 and 70 as the cylinder unit 30 is lifted can be compensated. That is, when the cylinder unit 30 supported by the first and second connecting members 60 and 70 is vibrated in the vertical direction with respect to the breaker housing 20, the first and second connecting members 50 60 of the first and second connecting members 50 and 60 draw the locus of the arc. At this time, the first and second connecting members 50 and 60 rotate while the rotating members 51 and 52 rotate, So that the amount of movement of the end portion of the breaker housing 60 toward the breaker housing 30 is compensated. Therefore, the cylinder unit 30 can be oscillated in the vibration space portion 31 of the breaker housing 30, and a buffering effect can be expected.

The buffering action by the buffer support unit 50 absorbs the reaction force after the chisel 40 is hit by the piston of the cylinder unit 30, so that the impact force of the hydraulic breaker is not affected.

When the cylinder unit 30 is lowered, when the cylinder unit 30 vibrates vertically downward, it rotates in a direction opposite to the first and second connecting members 50 and 60, The end portions of the members 60 and 70 draw the locus of the arc while the ends of the first and second connecting members 60 and 70 are rotated by the rotating members 51 and 52, , And the amount of the moving away is absorbed by the rotating member. Therefore, the cylinder unit 30 can be moved up and down. 1 and 3) located on the lower side of the first and second connecting members 60 and 70 installed in the breaker housing 20 in the process of vibration as described above, The vibration can be made along the vertical axis line of the cylinder unit 30 by making the length longer than the first connecting member 50. [

Therefore, the hydraulic breaker according to the present invention can absorb the vibration, which is generated during the crushing operation using the hydraulic breaker, particularly the reaction force due to the striking force, thereby preventing the vibration from being transmitted to the boom or the vehicle body through the breaker housing, Boom, excavator body, and breaker housing of hydraulic breaker can be protected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

INDUSTRIAL APPLICABILITY When the shock absorber of the hydraulic breaker of the present invention can be widely applied to various industrial machines, automobiles, etc., vibration damping can be applied to excavators and heavy equipment attachments.

Claims

A cylinder unit provided on the lower portion of the breaker housing so as to be movable up and down and provided with a chisel on the lower side; a cylinder unit provided between the cylinder unit and the breaker housing and supporting the cylinder unit with the chisel, And a buffer support unit for preventing vibration generated from the housing from being transmitted to the breaker housing,
The shock absorber supporting unit may include a cylinder unit or a rotatable member for rotatably supporting the cylinder unit. The upper and lower sides and the breaker housing or the cylinder unit may be rotatable about the center of rotation of the rotary member so as to support the cylinder unit with respect to the breaker housing And the first and second connecting members are connected to the breaker housing to compensate for the change in the coupling position of the first and second connecting members and the cylinder unit due to the rotation of the rotating member when the cylinder unit vibrates with respect to the breaker housing. Hydraulic breaker.

At least one rotating member is provided on the vibrating body so as to be rotatable in a direction perpendicular to the vibrating direction and the upper and lower sides of the center of rotation of the rotating member and the breaker housing are rotatably connected to each other so that the vibrating body is moved up and down with respect to the breaker housing Wherein the first and second connecting members are installed to be capable of vibrating.

3. The method according to claim 1 or 2,
And a connecting link provided on the lower side of the cylinder unit in which the rotary member is installed and the both ends of which are rotatably provided on the breaker.

3. The method according to claim 1 or 2,
And a plurality of anti-vibration members provided between the breaker housing and the cylinder unit.

A cylinder unit provided on the lower portion of the breaker housing so as to be movable up and down and provided with a chisel on the lower side; a cylinder unit provided between the cylinder unit and the breaker housing and supporting the cylinder unit with the chisel, And a buffer support unit for preventing vibration generated from the housing from being transmitted to the breaker housing,
The buffer support unit is provided with two rotary members arranged horizontally in parallel in the breaker housing or the cylinder unit, the upper side of the rotation center of the rotary member on one side and the breaker housing are connected by the first connection member, A connecting member is further provided so that the lower portion of the rotation center and the breaker housing are connected by the second connecting member so that the first and second rotating members can be rotated in the same direction when the cylinder unit vibrates with respect to the breaker housing Features a hydraulic breaker.