KR20170001781A - A hydraulic cutter - Google Patents

Abstract

The present invention relates to a hydraulic cutter with an improved structure, having an acceleration valve in a center joint part and having a pressure raising valve around a hydraulic cylinder, so as to increase a speed and a pressure of a hydraulic pressure transferred to the hydraulic cylinder. According to the present invention, the hydraulic cutter comprises: a bulk cap connected to a tip part of a boom bar of heavy equipment by a connection pin; a cutter body connected to the bulk cap by a flange; a moving arm combined with an upper part of the cutter body to be able to rotate by a hinge pin; the hydraulic cylinder installed between the moving arm and the cutter body to rotate the moving arm with respect to a turning cover; a center joint installed between the bulk cap and the cutter body, and supplying the hydraulic pressure to the hydraulic cylinder; and a blade unit installed to be mutually intersected to the cutter body and an end part of the moving arm to cut an object to be cut. Moreover, the hydraulic cutter includes the acceleration valve installed in the center joint to accelerate the speed of the hydraulic pressure transferred from the outside and the pressure raising valve installed in the hydraulic cylinder to raise the hydraulic pressure supplied into the hydraulic cylinder.

Description

{A HYDRAULIC CUTTER}

[0001] The present invention relates to a hydraulic cutter, and more particularly, to a hydraulic cutter capable of speeding up and boosting the hydraulic pressure transmitted from the outside by using both a speed increasing valve and a pressure increasing valve so as to be transmitted to the hydraulic cylinder, And more particularly to a hydraulic cutter whose structure is improved so as to be supported in correspondence with a motion.

Generally, an excavator, which is a construction equipment, is configured to selectively mount equipment such as a bucket, a shear, and a crusher on the front end of an operation arm connected to a main boom, Each equipment is configured to operate by a hydraulic device installed in the excavator itself.

In the case of hydraulic excavators and crushers installed on the excavator, it is installed in a structure that can rotate itself while connected to the operation arm of the main boom.

Prior art relating to the hydraulic cutter using the above excavator is disclosed in Korean Registered Utility Model No. 20-254081 entitled " Attachment for Hydraulic Crane Cutter "(registered on November 11, 2001), which is connected to the end of the excavator or crane boom A movable arm which is rotatably engaged with a hinge pin at an upper portion of the cutter body; and a movable cover which is disposed between the movable arm and the cutter body, A hydraulic cylinder for rotating the arm, and a blade portion disposed to intersect the cutter body and the end portion of the movable arm to cut the object.

The blade portion includes first and second blade fasteners fixed to an end of the cutter body and the movable arm, and a fixed blade and a movable blade fastened to the first and second blade fasteners with bolts.

However, in the conventional hydraulic cutting machine, when the diameter of the hydraulic cylinder is increased to increase the cutting force, hydraulic pressure is transmitted to the cylinder, and the hydraulic pressure is insufficient during the operation process of crossing or spreading the movable blade to the fixed blade by the hydraulic pressure of the cylinder If this is not possible, it takes a long time and the cutting efficiency is lowered.

To solve this problem, as disclosed in Korean Utility Model Application No. 20-0396929 entitled " Crusher of Excavator with Incremental Valve "(registered on September 21, 2005), hydraulic pressure generated in the hydraulic system of the excavator is transmitted through a hydraulic hose The crusher crusher includes a hydraulic cylinder supplied to the inside of the hydraulic cylinder and an operation arm that operates when hydraulic pressure is supplied into the hydraulic cylinder in a state where the hydraulic cylinder is hinged to the lower end of the hydraulic cylinder to crush the material. A supply line and a discharge line for supplying or discharging the hydraulic pressure generated in the hydraulic system are respectively formed on one side of the speed increasing valve body and a supply line and a discharge line are formed on the other side of the speed increasing valve body, A supply pipe and a discharge pipe respectively connected to the connection hose side are formed so as to be supplied and discharged, The flow rate through the discharge line is mixed with the flow rate supplied to the supply line, resulting in a flow rate of 1.3 times, which makes the operation arm break down faster.

In the above case, the speed increases only at the forward operation of the hydraulic cylinder, and at the time of the reverse operation, the speed is the same as that of the conventional one. To improve this, a booster valve may be applied. However, And it is not easy to mount due to constraints.

In addition, when the up-and-down valve is mounted on the hydraulic cylinders rotating and flowing on the basis of the end portions of the forward and backward movements and the rod, the service life of the hydraulic cylinder and the pressurizing valve is shortened due to the flow of the hydraulic cylinder, The durability of the parts is deteriorated.

Korean Registered Utility Model No. 20-254081 "Attachment for hydraulic crane cutter" (registered on November 11, 2001) Korean Registered Utility Model No. 20-0396929 entitled "Crusher of Excavator with Incremental Valve" (registered on September 21, 2005)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to provide a hydraulic control apparatus and a hydraulic control method for a hydraulic control apparatus, which is equipped with a speed increasing valve at a center joint portion, A hydraulic cutter having an improved structure is provided.

According to an aspect of the present invention, there is provided a cutting machine comprising a bulk cap connected to a front end of a boom bar of a heavy equipment with a connecting pin, a cutter body connected to the bulk cap and a flange, A hydraulic cylinder disposed between the movable arm and the cutter body for rotating the movable arm with the turning cover as a turning point; a center joint provided between the bulk cap and the cutter body for supplying hydraulic pressure to the hydraulic cylinder; A speed increasing valve mounted on the center joint for increasing the speed of the hydraulic pressure transmitted from the outside and transmitting the speed to the center joint, The pressure of the hydraulic pressure that is mounted on the hydraulic cylinder and supplied into the hydraulic cylinder is increased Further comprising a step-up valve is characterized in.

When the supplied oil pressure is equal to or higher than the set pressure, the sequence valve is opened and flows into the booster through the pressure reducing valve to increase the pressure. When the supplied oil pressure is equal to or lower than the set pressure, the pressure reducing valve is closed, will be.

The booster valve further includes support means connected to the center joint and the hydraulic cylinder for piping and supporting the valve housing to the inner surface of the cutter body.

Wherein the support means includes a coupling member slidably coupled to an outer side of the valve housing of the booster valve and having a coupling rod formed on an outer circumferential surface of the coupling member and a moving path of the booster valve formed in the cutter body and variable in operation of the hydraulic cylinder A bearing which is formed in the shape of a cylinder and through which the end of the coupling rod passes, a bearing which is coupled to an end of the coupling rod and rolls on the inner circumferential surface of the coupling hole, and a nut member which is fastened to an end of the coupling rod, Respectively.

Wherein the support means comprises a coupling band slidably coupled to the outside of the valve housing of the booster valve, a first link member rotatably pinned to the outside of the coupling band, And the other end is connected to the cutter body by a pin.

The present invention is characterized in that the speed increasing valve is connected to the center joint portion and the pressure increasing valve is mounted on the hydraulic cylinder in the cutter body so that the speed and pressure of the hydraulic pressure are increased before the external hydraulic pressure is supplied to the hydraulic cylinder side, Speed and cutting efficiency.

In addition, the present invention has an advantage that component lifetime can be improved by suppressing the flow of the booster valve mounted on the side of the hydraulic cylinder where the flow is severe, because the booster valve can be supported on the side of the cutter body using the support means.

1 is a perspective view of a hydraulic cutter according to a first embodiment of the present invention;
Fig. 2 is a side view of Fig. 1; Fig.
3 is a use state diagram of the first embodiment of the present invention.
4 is a perspective view showing another embodiment of the support means of the present invention;
Fig. 5 is a side view of Fig. 4; Fig.
6 is a use state view of another embodiment of the support means of the present invention;
7 is a perspective view showing still another embodiment of the support means of the present invention.
8 is a side structural view of Fig. 7; Fig.
9 is a use state view of still another embodiment of the inventive support means.
10 is a circuit diagram of the throttle valve and throttle valve of the present invention.

1 to 3, the hydraulic cutter according to the present invention includes a bulk cap 50 connected to a front end of a boom bar of a heavy equipment with a connecting pin, a cutter body 100 A movable arm 200 rotatably coupled to the upper portion of the cutter body 100 by a hinge pin and a movable cover 200 disposed between the movable arm 200 and the cutter body 100, A center joint 400 which is provided between the bulk cap 50 and the cutter body 100 and supplies the hydraulic pressure to the hydraulic cylinder 300; And a blade unit 500 disposed at an end of the cutter body 100 and the movable arm 200 so as to intersect with each other and cutting the object. The blade unit 500 mounted on the center joint 400, And the accelerator ball is transmitted to the center joint (400) And a pressure increase valve 700 mounted on the hydraulic cylinder 300 to increase the pressure of the hydraulic pressure supplied into the hydraulic cylinder 300. [

The blade unit 500 includes a fixed blade 510 and a movable blade 520 that are fastened by a bolt to be fixed to the end of the cutter body 100 and the movable arm 200.

More specifically, the speed increasing valve 600 performs a function of feeding the external oil pressure to the pressurizing valve 700 via the center joint 400 after the external oil pressure is supplied to the center joint 400 before the oil is supplied to the center joint 400 .

10, the speed increasing valve 600 is coupled to the center joint 400. When the supplied oil pressure is equal to or lower than the set pressure, the speed increasing valve 600 joins the flow amount flowing into the interior through the check valve 604 And is discharged to the outside through the relief valve 602 when the supplied oil pressure is equal to or higher than the set pressure.

When the supplied oil pressure is equal to or higher than the preset pressure, the sequence valve 702 is opened and flows into the booster 706 through the pressure reducing valve 704 so as to be increased in pressure. When the supplied oil pressure is equal to or lower than the set pressure The pressure reducing valve 704 is closed so that the hydraulic pressure is prevented from flowing into the booster 706 side.

The pressure increasing valve 700 is connected to one side of the hydraulic cylinder 300 so as to supply the hydraulic pressure to the hydraulic cylinder 300 side and the valve housing 710 is configured as a free end in the cutter body 100 Respectively.

It is preferable to further include a support means 800 for supporting the valve housing 710 of the pressure-increasing valve 700 to the cutter body 100.

The supporting means 800 is interlocked with the movement of the hydraulic cylinder 300 which is rotated in the cutter body 100 so that the valve housing 710 of the pressure increasing valve 700, It is advantageous in that durability of the parts can be increased.

The supporting means 800 includes a coupling member 810 slidably coupled to the outside of the valve housing 710 of the booster valve 700 and having a coupling rod 812 formed on the outer peripheral surface thereof, A coupling hole 820 which is formed in a shape corresponding to the movement path of the pressure-increasing valve 700 and which is variable in operation of the hydraulic cylinder 300 and through which the end of the coupling rod 812 passes, A bearing 822 coupled to an end of the coupling rod 812 and rolling on the inner circumferential surface of the coupling hole 820 and a nut member 824 fastened to the end of the coupling rod 812 to prevent the bearing 822 from coming off 825).

The coupling member 810 has a ring shape to enclose the valve housing 710 of the booster valve 700 from the outside and has a structure in which the coupling rod 812 protrudes from the outer surface.

The engaging hole 820 is formed in a circular arc shape corresponding to the moving path of the engaging rod 812 according to the movement of the engaging member 810 so that the end of the engaging rod 812 of the engaging member 810 is slidably moved Structure.

A washer member 824 is interposed between the bearing 822 and the nut member 825.

Although not shown in the drawings, a snap ring for preventing separation can be disposed on the left and right sides of the bearing 822. [

The reference numeral 70 denotes a hydraulic motor.

The present invention having such a configuration connects the speed increasing valve 600 to the center joint 400 and connects the pressure increasing valve 700 to the hydraulic cylinder 300 in an interlocking manner.

Thereafter, an external hydraulic pressure is increased during the process of passing through the speed increasing valve 600 and is transmitted to the pressure increasing valve 700 side. The hydraulic pressure is increased while passing through the booster 706 of the pressure increasing valve 700, .

When hydraulic pressure is supplied from the pressure increasing valve 700, the hydraulic cylinder 300 rotates the movable arm 200 toward the end of the cutter body 100 according to the supplied direction to cut the object to be cut, 200 can be rotated upward to the original position to release the gripping state of the object to be cut.

In this case, when the hydraulic cylinder 300 is supplied with the hydraulic pressure to the hydraulic cylinder 300 in the advancing direction so as to rotate the movable arm 200 toward the end of the cutter body 100, the housing of the hydraulic cylinder 300 moves forward And moves upward while being operated.

Accordingly, the pressure-increasing valve 700 connected to the hydraulic cylinder 300 is rotated in an arc shape in the advancing direction of the hour hand in conjunction with the operation of the hydraulic cylinder 300.

The support means 800 for supporting the booster valve 700 having such a motion on the cutter body 100 is structured such that a band-like binding member 810 is slidably mounted outside the valve housing 710 of the booster valve 700 The washer member and the nut member 825 are attached to the end of the coupling rod 812 after the coupling rod 812 formed on the outer side of the coupling member 810 is passed through the coupling hole 820 formed in the cutter body 100, Lt; / RTI >

The supporting means 800 supports the valve housing 710 of the pressure-increasing valve 700 interlocked with the hydraulic cylinder 300 during the forward movement of the hydraulic cylinder 300, and more specifically, the binding member 810 surrounding the valve housing 710, The coupling rod 812 is slid in the coupling hole 820 of the cutter body 100 while being moved according to the movement of the valve housing 710.

Since the coupling member 810 is coupled in the form of a band surrounding the outer side of the valve housing 710 of the booster valve 700, excessive movement of the booster valve 700 is limited to prevent the fatigue load transmitted to the booster valve 700 The life of the parts can be prolonged.

On the contrary, when the hydraulic cylinder 300 feeds the hydraulic pressure to the hydraulic cylinder 300 in the reverse direction to return the movable arm 200 to its original position, the housing of the hydraulic cylinder 300 is moved backward to the rod side And moves to the lower side.

The coupling rod 812 of the coupling member 810 is moved back to its original position while sliding along the edge of the coupling hole 820 at the backward movement of the hydraulic cylinder 300.

Accordingly, the present invention is characterized in that the speed increasing valve 600 is coupled to the center joint 400 and the pressure increasing valve 700 is mounted on the hydraulic cylinder 300 in the cutter body 100, The speed and the pressure of the hydraulic pressure can be increased and supplied before being supplied to the work 300, thereby improving the working speed and cutting efficiency of the cutter.

4 to 6 are views showing another embodiment of the support means 800 of the present invention wherein the support means 800 includes a coupling band slidably coupled to the outside of the valve housing 710 of the booster valve 700, A first link member 842 rotatably pinned to the outside of the coupling band 830 and one end connected to the end of the first link member 842 by a joint member 845 And a second link member 844 having the other end pin-coupled to the cutter body 100.

The joint member 845 connecting the first and second link members 842 and 844 may employ a universal joint.

The coupling band 830 is configured in a band shape so as to surround a part of the outer periphery of the valve housing 710 of the booster valve 700 and is slidable on the outer periphery of the valve housing 710 of the booster valve 700.

7 to 9 are views showing still another embodiment of the support means 800 of the present invention in which the support means 800 is provided with a tie rod which is slidably coupled to the outside of the valve housing 710 of the booster valve 700 And a support cylinder 860 having one end connected to the outside of the binding band 850 and the other end rotatably connected to the inner surface of the cutter body 100.

The supporting cylinder 860 is expanded and contracted by the movement of the binding band 850 interlocked with the movement of the hydraulic cylinder 300 to compensate for the displacement of the binding band 850 due to the movement of the binding band 850.

Other embodiments of the present invention as described above show that the support means 800 for supporting the booster valve 700 is not limited and other modifications are possible.

50: bulk cap 100: cutter body
200: movable arm 300: hydraulic cylinder
400: center joint 500: blade part
510: fixed blade 520: movable blade
600: Incremental valve 602: Relief valve
604: Check valve 700: Booster valve
702: Sequence valve 704: Pressure reducing valve
706: booster 710: valve housing
800: support means 810: binding member
812: Coupling rod 820: Coupling ball
822: Bearing 824: Washer member
825: Nut member 830: Coupling band
842: first link member 844: second link member
845: joint member 850: tie strap
860: support cylinder

Claims (5)

A bulk cap 50 connected to a front end of a boom bar of a heavy equipment with a connecting pin, a cutter body 100 connected to the bulk cap 50 by a flange, and a hinge pin A hydraulic cylinder 300 disposed between the movable arm 200 and the cutter body 100 for rotating the movable arm 200 with a turning cover as a turning point; A center joint 400 provided between the cutter body 100 and the cutter body 100 for supplying the hydraulic pressure to the hydraulic cylinder 300 and a center joint 400 disposed between the cutter body 100 and the cutter body 100 to cross the end portions of the cutter body 100 and the movable arm 200 And a blade unit (500) for cutting the object,
A speed increasing valve 600 mounted on the center joint 400 to increase the speed of the hydraulic pressure transmitted from the outside to transmit the increased speed to the center joint 400,
Further comprising a pressure-increasing valve (700) mounted on the hydraulic cylinder (300) for increasing a pressure of a hydraulic pressure supplied into the hydraulic cylinder (300). The method according to claim 1,
When the supplied oil pressure is equal to or higher than the set pressure, the sequence valve is opened and flows through the pressure reducing valve 704 to the booster 706 so as to be increased in pressure. When the supplied oil pressure is equal to or lower than the set pressure, (704) is closed so that the hydraulic pressure does not flow into the booster (706) side. The method according to claim 1,
The booster valve 700 further includes support means 800 connected to the center joint 400 and the hydraulic cylinder 300 for supporting the valve housing 710 on the inner surface of the cutter body 100 Wherein the hydraulic cutter is a hydraulic cutter. The method of claim 3,
The supporting means 800 includes a coupling member 810 slidably coupled to the valve housing 710 of the booster valve 700 and having a coupling rod 812 formed on the outer peripheral surface thereof,
The hydraulic cylinder 300 is formed in a shape corresponding to the movement path of the pressure-increasing valve 700 and is formed in the cutter body 100 and has a through hole 820,
A bearing 822 coupled to an end of the coupling rod 812 and rolling on an inner circumferential surface of the coupling hole 820,
And a nut member (825) fastened to an end of the coupling rod (812) so as to prevent the bearing (822) from coming off. The method of claim 3,
The supporting means 800 includes a coupling band 830 slidably coupled to the valve housing 710 of the booster valve 700,
A first link member 842 rotatably and pin-coupled to the outside of the coupling band 830,
And a second link member (844) having one end connected to the end of the first link member (842) by a joint member (845) and the other end pin-coupled to the cutter body (100).

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