KR101839814B1 - Portable cutting device - Google Patents

Abstract

The present invention relates to a portable cutting apparatus, which comprises a hydraulic cylinder to which hydraulic oil is supplied from an external hydraulic unit, a connection link which is engaged with a flange (101) of the hydraulic cylinder and has two connection rods, First and second cutting portions which are respectively coupled to the connecting bars and whose intermediate pivotal holes are superimposed on one pivotal shaft and form cutting blades on the other side; And it is formed in a small size so as to give a cutting force of a high weight.

Description

Portable cutting device

The present invention relates to a portable cutting apparatus capable of imparting a high cutting force by using hydraulic power.

The invention of Patent Document 001 is an invention for a life saving apparatus provided with a self-illuminating operation means. The present invention relates to a lifesaving device having self-luminous operation means capable of being recognized even at night or in a dark place by providing a light emitting element in an operation means provided to enable the user to operate the life saving apparatus. The apparatus is also provided with a hydraulic pump, And operating means including a handle, a lever or an operation panel capable of operating a life saving device including at least one hose. A switch for outputting an on-off signal of the light emitting element, which is provided on the outer surface of the operating means or on the body of the lifesaving device; And a power supply means provided on any one of the outer surface and the body of the lifesaving device to supply power to the light emitting device.

Patent Document 002 is an invention relating to a hydraulic cutter. More particularly, the present invention relates to a hydraulic cutter used for cutting a steel pipe or a thick electric wire, more specifically, a pair of scissor-type hinged cutting knives are cut by the action of hydraulic pressure to cut an object to be cut, In order to make the cutting knife open, the cutting knife is automatically opened by the air pressure filled in the cylinder body only by cutting off the supply of the hydraulic pressure, and the piston is reciprocated inside the cylinder body, And a space portion filled with air pressure is formed in the piston rod so that the size of the cylinder body can be greatly reduced. A blade guide, which is guided by the other cutting knife, is provided at the tip of the one cutting blade, So that the joined cutting knives do not spread out. Patent Literature 002 discloses a structure in which a pair of cutting knives are hingedly provided on a tip end portion of a piston rod protruding and retracted from a cylinder body and a link is provided between the outer end of the pair of cutting knives and a bracket provided outside the front side of the cylinder body A hydraulic cutter according to any one of the preceding claims, further comprising a switch for opening and closing a solenoid valve of a hydraulic motor for supplying oil to the cylinder body, the piston being disposed in the rear of the cylinder body An oil supply pipe for injecting oil into the space in front of the piston in the cylinder body is connected to the front outside of the cylinder body, and the piston rod and the piston are integrally formed , A space portion communicating with the inside of the piston rod and the piston is formed, Leading end of the cutting knife is characterized in that installed in the blade guides to the other cutting knife guide.

Patent Literature 003 discloses a cable cutter, which comprises a cylinder body constituted by a piston body constituted internally and reciprocally moved, and a cylinder body which is hingedly fixed at a predetermined angle with a fixing pin as a common hinge axis at one end of a header of the piston body inside the cylinder body A pair of cable cutting movable shafts, a pair of cable cutting movable shafts, a pair of cable cutting movable shafts, a pair of cable cutting movable shafts, a pair of cable cutting movable shafts, And a cutting portion composed of a pair of cable cutting shears integrally formed with the cutting blade inside the upper end of the fixing pin.

KR 10-2012-0042088 A (May 3, 2012.) KR 10-0591676 B1 (Jun. 13, 2006) KR 20-0237084 Y1 (Sep. 25, 2001)

The present invention relates to a portable cutting apparatus capable of imparting a high cutting force by using hydraulic power.

The hydraulic cylinder 100 is connected to the plunger 101 of the hydraulic cylinder and is formed of two connecting bars 201 and 202. The hydraulic cylinders 100, One side of the connecting link 200 is coupled to the connecting bar and the other side of the intermediate connecting hole 302 and 303 is coupled to one rotating shaft 401 and the other side of the connecting blade 200 is connected with cutting blades 304 and 305 And a frame (400) on which the hydraulic cylinder is fixed to one side and the pivot axis is formed on the other side.

In the portable cutting apparatus described above, a cover 500 detachably coupled to the other side of the frame and forming a through hole 501 to be coupled with the rotation axis.

A first contact surface 402 formed on a boundary surface of the frame in which the rotation axis protrudes; and a second contact surface 502 on a surface of the cover formed with the through hole.

A connecting link 200 formed by two connecting bars 201 and 202 and coupled to the plunger 101 of the hydraulic cylinder, a hydraulic cylinder 100 for supplying hydraulic oil from an external hydraulic unit, The first and second cutouts 300 and 300 are coupled to the connection bars and are respectively coupled to one pivot shaft 401 and the intermediate pivot holes 302 and 303 are coupled to each other. And a frame (400) having the hydraulic cylinder fixed to one side thereof and the pivot shaft formed on the other side of the frame, wherein the frame (400) is disposed inside the hydraulic cylinder, and resiliently returns the plunger (104), and a switch (600) formed on the outside of the frame and operating the directional control valve of the hydraulic unit.

Further, a portable cutting apparatus includes a hydraulic pipe 102 connecting a hydraulic cylinder and an oil pressure unit, and a connection pipe integrally covering a control line 601 connecting the switch and the directional control valve.

The portable cutting device of the present invention has an effect of increasing the portability of a user because a high-pressure hydraulic pressure is applied by a small hydraulic cylinder.

In the portable cutting apparatus of the present invention, since the first and second cutting portions and the pivot shaft are fixed by the cover, the blade can be easily replaced.

Since the portable cutting apparatus of the present invention supports the cutting edge by a plurality of contact surfaces, the cutting efficiency is high because no blade gap is generated during the cutting process.

The portable cutting apparatus of the present invention has the effect of enabling reciprocating operation of the hydraulic cylinder from one hydraulic pipe by the spring in the hydraulic cylinder.

The portable cutting device of the present invention has an effect of increasing the efficiency of work because it operates the hydraulic valve at the handle.

The portable cutting apparatus of the present invention is advantageous in that the hydraulic pipe and the control line are integrally formed by coating so that the management efficiency is high.

1 is a perspective view of a portable cutting apparatus according to the present invention;
Fig. 2 is a schematic diagram of a hydraulic circuit diagram for a cutting device and a clamping device of the present invention
Figure 3 is an exploded perspective view of the portable cutting device of the present invention
Figure 4 shows a portable cutting device < RTI ID = 0.0 >

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1-1) The present invention relates to a portable cutting apparatus, which comprises a hydraulic cylinder 100 to which hydraulic fluid is supplied from an external hydraulic unit, two connection bars 201 and 202, A connection link 200 having one side rotatably and integrally coupled to the hydraulic cylinder flange 101 and the other side rotatably coupled to each of the cutting blades 304 and 305; First and second cutouts 300 and 301 which are coupled to one pivotal axis 401 so as to form pivotal holes 302 and 303 on the intermediate side and form cutting blades 304 and 305 on the other side, A frame 400 for fixing the hydraulic cylinder on the other side and inserting the pivot holes 302 and 303 by projecting the pivot shaft in a vertical direction, and a frame 400 detachably coupled to the other side of the frame by a bolt fastener , A through hole (501) for inserting the pivot shaft is formed, and a through hole And a cover 500 which externally engages a handle nut formed with a female screw threadably engaged with the male screw.

(Example 1-2) The frame includes a handle having a plurality of grooves that can be gripped by a finger of an operator.

(Embodiment 1-3) In Embodiment 1-1, the hydraulic cylinder is formed of a body and a flange, and the contact portion of the flange inserted into the body and the inside of the body are sealed with a plurality of O-rings.

(Example 1-4) In Example 1-3, the body is made of aluminum 5051, and the body inner diameter is heat-treated. The heat treatment is performed at a temperature of 650 ° C to 680 ° C for 3 hours to 3 hours and 30 minutes, and then heated at a temperature of 350 ° C to 400 ° C for 12 hours. The reason and effect of this heat treatment is to maintain high pressure in small vessels, to increase wear resistance, and to withstand high pressures. As a critical meaning of the numerical value, the pressure resistance resistance of the hydraulic cylinder shows a gentle increase at a temperature of 650 ° C or less under a heating condition of 3 hours or less. However, when the heat treatment is performed at a temperature of 650 to 680 占 폚 for 3 hours to 3 hours and 30 minutes, the pressure resistance resistance is not increased.

(Embodiment 1-5) In Embodiment 1-1, the frame includes a grip portion to be engaged with an arm of a human body, and the grip portion is formed in a band shape, So that they are uniformly fastened to each other.

(Example 1-6) In Example 1-1, the cutting edge includes a curved line.

(Example 2-1) In Example 1-1, the portable cutting device includes a cover 500 detachably coupled to the other side of the frame and forming a through hole 501 to be coupled with the rotation axis do.

(Example 2-2) In Example 2-1, the cover and the frame are joined by a fastening device. The fastening device may be formed in a structure of a groove and a projection or a bolt and a nut or a hook and a ring to facilitate mounting and detachment.

(Embodiment 2-3) In Embodiment 2-1, the pivot shaft protruding from the frame inserts and connects the through-hole inner diameter formed in the cover, and stably supports the pivot shaft. The inner diameter of the through hole is formed by an oilless bearing to increase abrasion resistance during rotation.

(Embodiment 2-4) In Embodiment 2-1, the first and second cut portions are replaceable after a certain amount of consumable parts are used, and the first and second cut portions are replaced with the first and second cut portions After inserting the rotating holes sequentially, fix the cover.

(Example 3-1) In Example 2-1, the portable cutting device is formed on the frame and has a first contact surface 402 formed on the outer circumferential portion of the rotating shaft, And a second contact surface (502) formed on the region. Wherein the first contact surface forms a first contact surface which is in surface contact with one surface of the first cut portion and the second contact surface forms a second contact surface which is in surface contact with one surface of the second cut portion, The other surface forms a third contact surface which is in mutual surface contact.

(Example 3-2) In Example 3-1, the first contact surface, the second contact surface, and the third contact surface were processed so as to satisfy the conditions of a friction coefficient of 0.1 to 0.15 or a polymer material having an even relationship with the Teflon material Coated.

The first contact surface, the second contact surface, and the third contact surface are machined with high precision because of high mechanical load acting as a bearing force, to prevent abrasion due to contact, and to cause smooth sliding phenomenon.

(Example 3-3) In Example 3-1, the first, second, and third contact surfaces are formed in the same area and formed into a donut shape.

(Example 4-1) A portable cutting device according to Example 1-1 is characterized in that the portable cutting device includes a spring (104) located inside the hydraulic cylinder and elastically returning the plunger; And a switch 600 for operating the directional control valve.

(Embodiment 4-2) In Embodiment 4-1, the spring is formed of a coil spring, which is mounted inside the hydraulic cylinder and is coupled to the mating surface of the receiving space filled with the operating oil.

When the hydraulic cylinders are extended, the hydraulic fluid is filled in the receiving space. When the hydraulic cylinders are shrunk, the hydraulic fluid in the receiving space is drained. The elongation of the plunger acts on the hydraulic pressure of the hydraulic unit, and the contraction of the plunger is achieved by the coil spring. This is advantageous in that a single hydraulic pressure line can be formed between the hydraulic unit and the hydraulic cylinder.

(Embodiment 4-3) In Embodiment 4-1, the oil pressure unit includes a container, an oil filter, an oil pump, an oil pump drive device, a safety valve, and a direction switching valve in one case. The receiving container formed inside the case receives the operating oil, and the operating oil is sucked by the oil pump. An oil filter is installed at the end of the suction pipe of the oil pump to block the suction of impurities in the oil. The oil pump is driven by an oil pump drive.

(Embodiment 4-4) In Embodiment 4-3, the oil pump drive apparatus uses an engine, and the engine is installed together with a fuel tank. In other words, a rotational force is generated by driving the engine, and the rotational force drives the oil pump.

(Embodiment 4-5) In Embodiment 4-3, an electric motor is used as the drive device of the oil pump. The electric motor is powered by a replacement battery or rechargeable battery, the electric power drives the electric motor, and the electric motor drives the oil pump.

(Embodiment 4-6) In Embodiment 4-3, the hydraulic oil sent out from the oil pump is connected to the check valve by the direction changeover valve. Insert a safety valve and a pressure gauge between the check valve and the direction switching valve. The directional valve is formed by a solenoid valve and is operated by a switch control.

(Embodiment 5-1) In Embodiment 4-1 of the portable cutting apparatus, the portable cutting apparatus includes a hydraulic pressure line 102 connecting the hydraulic cylinder and the hydraulic pressure unit,

And a control line 601 for connecting the switch and the directional control valve is integrally formed.

(Embodiment 5-2) In Embodiment 5-1, the direction switching valve is divided into sending and blocking, and sending conditions are made by ON operation of the switch. The cutoff condition is caused by the OFF operation of the switch.

(Example 5-3) In Example 5-1, the connection pipe forms contact terminals at both ends. The contact terminals on both sides are connected to the hydraulic line and the control line by one connection.

(Example 6-1) In the above-described embodiments, a bag accommodating the hydraulic unit, a hydraulic pressure line connected to the outside of the bag, and a control line are formed.

(Example 6-2) In Example 6-1, the bag includes a fastening device that can be fastened to the back of a human body, or includes a pedestal that can be placed on the ground.

(Example 6-3) In Example 6-1, the bag was charged by a charger mounted inside the vehicle from a power source of the moving vehicle, or the rechargeable battery mounted on the bag was connected to a power source Lt; / RTI >

(Example 7-1) In the above-described embodiments, the connection pipe and the directional control valve including the inlet pipe and the control line are formed in a pair, one side of each connection pipe is coupled with the direction control valve, Side is coupled to a plurality of hydraulic cylinders. That is, a plurality of hydraulic cylinders can be connected from one hydraulic unit.

(Example 7-2) In Example 7-1, one hydraulic cylinder is connected to the first and second cuts, and the other hydraulic cylinder is connected to the first and second clamps.

100: Hydraulic cylinder 101: Plenzer
102: Hydraulic pipeline 103: Directional switching valve
104: spring 200: connecting link
201: Connection bar 202: Connection bar
300: first cut portion 301: second cut portion
302: pivot hole 303: pivot hole
304: cutting blade 305: cutting blade
400: frame 401:
402: first contact surface 500: cover
501: through hole 502: second contact surface
600: switch 601: control line

Claims (5)

A hydraulic cylinder 100 supplied with hydraulic oil from an external hydraulic unit;
One side of each connecting bar is rotatably and integrally coupled with the hydraulic cylinder plunger 101 and the other side is rotatably attached to each of the cutting blades 304 and 305 A connection link 200,
The first and second cut portions (304, 305) are coupled to one side of the connecting bar, the intermediate side pivot holes (302, 303) are coupled to one pivot shaft (401) 300, 301);
A frame 400 for fixing the hydraulic cylinder on one side and inserting the pivot holes 302 and 303 by projecting the pivot shaft in the vertical direction on the other side;
The other side of the frame is detachably coupled by a bolt fastening device,
A through hole 501 for inserting the pivot shaft is formed,
And a cover (500) for externally engaging a handle nut having a female screw threadably engaged with a male screw on one side of the rotary shaft.
delete The method according to claim 1,
A first contact surface (402) formed on a boundary surface of the frame in which the rotation axis protrudes;
And a second contact surface (502) formed on a surface of the cover in which the through hole is formed.
The method according to claim 1,
A spring (104) located inside the hydraulic cylinder and elastically returning the plunger;
And a switch (600) formed on the outside of the frame and operating a directional control valve of the hydraulic unit.
The method of claim 4,
A hydraulic pipe (102) connecting the hydraulic cylinder and the hydraulic unit, and a control pipe (601) connecting the switch and the directional control valve are integrally covered.

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