KR20120139434A

KR20120139434A - Variable cylinder apparatus

Info

Publication number: KR20120139434A
Application number: KR1020110059235A
Authority: KR
Inventors: 장승수
Original assignee: 장승수
Priority date: 2011-06-17
Filing date: 2011-06-17
Publication date: 2012-12-27

Abstract

The present invention can be used by dividing a small force and a large force, and particularly relates to a very useful hydraulic cylinder capable of performing the operation of the fast operating rod while reducing the overall size of the cylinder by further embedding another cylinder in the operating rod will be.

Description

Variable low and high pressure hydraulic cylinder device {VARIABLE CYLINDER APPARATUS}

The present invention relates to a variable low-pressure and high-pressure hydraulic cylinder device, and more specifically, can be used by dividing the small force and the large force, in particular the other cylinder in the working rod to reduce the overall size and at the same time fast operating rod It relates to a very useful hydraulic cylinder capable of performing the operation of.

In general, various types of cylinders are used in industrial machinery and the like, and a conventional general hydraulic cylinder includes a body, a piston, a piston rod, an end cap, a hydraulic oil port, and a seal.

That is, the front and rear sides of the body portion is formed a port that is a passage for receiving the hydraulic oil of a certain pressure from the hydraulic oil storage unit not shown in accordance with the forward and backward movement of the piston, and at one end of the hollow with the end cap It is made of a cylindrical shape, the piston is fitted with a piston seal on the outer circumferential surface and the piston rod is fixedly connected at one end so as to reciprocate linear movement by a stroke distance in the body portion.

The other end of the body portion blocked by the end cap is formed to penetrate the cylinder rod, and is blocked by the piston rod bearing, the piston rod seal and the lock nut to prevent leakage of the hydraulic oil in the body portion.

Conventional hydraulic cylinders are used to control the large force and small force by the hydraulic pump, so that the operation of the whole of the operating rod is carried out whether the small force or large force.

As described above, since the moving time of the energy and the operating rod for moving the entire main cylinder becomes longer, the working time increases and the use energy also increases.

The problem to be solved of the present invention is that the stroke length when using a small force made of low pressure and the stroke length when using a large force at high pressure is composed of a cylinder, a rod cylinder and a fixed rod when using a small force and when using a large force To provide a variable low pressure and high pressure output hydraulic device that can be applied to the equipment by varying the interval of.

The problem solving means of the present invention comprises a working rod portion is formed in the inner cylinder of the cylinder in the rod is moved forward and backward; A main piston part in which a close contact ring is inserted at an end of the operating rod part to form a structure through which a center penetrates, and an inner rod part is inserted and a flow path is formed between the inner cylinder part and the main cylinder part; A mail cylinder portion in which an inner rod portion is fixed at the center of the cylindrical structure so that linear movement is made in front and rear of the main piston portion; A fixed rod portion having a connector formed at an end of the main cylinder portion; A fixed piston part mounted at an end of the inner rod part and inserted into an inner cylinder part of an operating rod part and having a hydraulic flow passage connecting the fixed rod part to the inner rod part; A switching valve configured to operate the operation rod part at a low pressure or to operate at a high pressure, and to change a flow path to supply or discharge oil to the main cylinder part to operate the operation rod at a low pressure to a high pressure, and a main cylinder part; It is connected to the fixed rod part is equipped with a peristaltic valve having a positive pressure function and a one-way function to open and close when a certain pressure abnormality, a hydraulic pump for supplying oil to the main cylinder and the inner cylinder and a valve control unit for controlling the hydraulic pump and valve And oil tanks for storing and supplying oil.

According to the present invention, when a small force is required, the actuating rod part is rapidly moved and pressurized, and when a large force is required, the hydraulic cylinder is supplied to the main cylinder to which high pressure is applied to use a large force to increase work efficiency. There is.

In addition, it is effective to save energy when selecting a small force (low hydraulic pressure required) and a large force (high hydraulic pressure).

Possibilities of the Invention It is a very useful invention that the cylinder device can be used in a fork crane, a hydraulic cutter, and the like.

1 is a perspective view showing a variable low pressure and high pressure hydraulic cylinder device of the present invention.
Figure 2 is a perspective view of the operation of the variable low and high pressure hydraulic cylinder device of the present invention.
3 is an operating state diagram showing an expanded state of the variable low-pressure and high-pressure hydraulic cylinder device of the present invention.
Figure 4 is an operating state showing the contracted state of the variable low-pressure and high-pressure hydraulic cylinder device of the present invention.

Hereinafter, with reference to the accompanying drawings of the variable low and high pressure hydraulic apparatus of the present invention will be described in detail.

The variable low pressure and high pressure hydraulic apparatus of the present invention is possible to push down a brick wall when mounted on a fork lane or to break with a small force when crushing, and a large force is required when breaking a concrete wall or thick wall.

As described above, the main force and the small force are configured so that they can be used at the time of use, and the operation rod part is configured to be able to enter and exit quickly.

1 and 2 are a perspective view showing an operating state of an embodiment of the present invention, Figures 3 and 4 is an operating state diagram showing the operating state of the present invention.

Variable low-pressure and high-pressure hydraulic apparatus of the present invention is the connector 100 is formed and the operating rod portion 120 is formed in the inner cylinder portion 150 of the cylinder in the rod moving forward and backward; The contact ring 160 is fitted to the end of the operation rod 120 to increase the sealing force, and the through-hole 140 is formed at the center thereof so that the inner rod 180 is inserted and mounted, and the inner cylinder 150 A main piston part 250 having a flow path 200 between the main cylinder parts 250; A mail cylinder part 250 in which an inner rod part 180 is fixed to a center of the cylindrical structure so that linear movement is made in front and rear of the main piston part; A fixed rod part 130 having a connector 110 formed at an end of the main cylinder part; It is mounted on the end of the inner rod portion 180 and inserted into the inner cylinder portion 150 of the operation rod portion 120 is mounted, the hydraulic flow path 170 connecting the fixed rod portion 130 and the inner rod portion 180 Fixed piston portion 190 penetrated; The operation rod unit 120 is configured to operate at low pressure or high pressure, and the main cylinder unit 250 to supply or discharge oil to the main cylinder unit to operate the operation rod unit 120 at low pressure to high pressure. A hydraulic valve (pipe) is connected to the front of the switch valve 310 to provide an oil supply flow path, and is connected to the rear of the main cylinder part and the fixed rod part. Equipped with a peristaltic valve 320 to perform, the hydraulic pump 340 for supplying oil to the main cylinder and the inner cylinder, the hydraulic pump 340 and the valve control unit 350 and oil tank for controlling each valve ( Not shown).

In an embodiment of the operation of the present invention Figure 3 is a low pressure hydraulic pump 340 is operated and the hydraulic pressure is supplied. At this time, the pressure is set below the reference pressure in the positive pressure valve 320 and the oil is supplied to the inner cylinder portion through the flow path 170 of the fixed rod portion and the inner rod portion 180, the operating rod portion by the supplied oil 120 will move forward. At this time, the oil between the fixed piston 190 and the main piston 230 is discharged through the 'U'-shaped flow path 200 formed in the main piston 230, the discharged oil is a hydraulic hose (pipe) The oil is supplied to the main cylinder part 250 through the 240. At this time, the switching valve is a switching valve 310 which opens the flow path to the lower portion of the main cylinder portion is made to supply the returned oil. When the oil discharged as described above is insufficient or left, the oil tank 360 is supplied when supplied or stored when excess.

At this time, when a high pressure (large force) is required for the operation rod part 120 advanced to a certain length, the hydraulic pump 340 is operated by the valve control unit 350, and the high pressure obtained by the operation opens the positive pressure valve 340. Oil is simultaneously supplied to the main cylinder portion 250 at a high pressure. When oil of high pressure flows into the main cylinder part 250, the working rod part is operated to move forward with great force. In addition, the inner cylinder portion 150 and the main cylinder portion 250 is made to exert a great force by acting at the same time.

The operation of the hydraulic pump 340 when changing from low pressure to high pressure as described above, the opening and closing position when the flow path direction change valve 310 connected to the main cylinder part 250 and the flow path direction are abnormal or less than the reference pressure It consists of a peristaltic valve including a positive pressure valve 310 for supplying oil and a one-way valve for discharging the oil to be turned in one direction, and a valve control unit 350 for adjusting the switching valve, the peristaltic valve and the oil pump.

Figure 4 describes in detail the operating state at the time of contraction of the variable low-pressure and high-pressure hydraulic cylinder device of the present invention.

At the time of contracting the fully extended working rod 120, the oil pressure generated by the hydraulic pump 340 is changed through the switching valve 340 to supply oil to the upper portion of the main cylinder 250.

The supplied oil supplies oil between the fixed piston part 190 and the main piston part 230, and the supplied oil supplies oil through a 'U'-shaped flow path 200 penetrating the main cylinder part at the same time. Done. The main cylinder part 250 is lowered by the supplied oil, and at the same time, the oil of the inner cylinder part 150 is discharged through the flow path 170 penetrated through the fixed piston part 190, and the discharged oil is interlocked with a valve. The one-way function within the 320 is supplied to the hydraulic pump 340 or made to return to the oil tank.

As described above, the oil of the inner cylinder part 150 and the oil of the main cylinder part 250 are discharged through the flow path 170, and the operation rod is rapidly lowered.

The peristaltic valve can be configured automatically or as a manual valve. When setting the pressure, the user can set the desired reference pressure.

3 and 4, the actuating rod part is operated to be advanced back and forth by the valve control part.

Although the present invention as described above has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art may various modifications and other equivalent embodiments therefrom. Will understand. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100,110: connector 120: operating rod
130: fixed rod portion 140: through hole
150: inner cylinder 160,220: contact ring
170,200: Euro 180: Internal rod part
190: fixed piston portion 230: main piston portion
240: hydraulic hose (pipe) 250: main cylinder portion
310: switching valve
320: peristaltic valve
340: hydraulic pump 350: valve control unit

Claims

An actuating rod portion in which a connector is formed and an inner cylinder of a cylinder is formed in the rod moved forward and backward;
A main piston part in which a close contact ring is inserted at an end of the operating rod part to form a structure through which a center penetrates, and an inner rod part is inserted and a flow path is formed between the inner cylinder part and the main cylinder part;
A mail cylinder portion in which an inner rod portion is fixed at the center of the cylindrical structure so that linear movement is made in front and rear of the main piston portion;
A fixed rod portion having a connector formed at an end of the main cylinder portion;
A fixed piston part mounted at an end of the inner rod part and inserted into an inner cylinder part of an operating rod part and having a hydraulic flow passage connecting the fixed rod part to the inner rod part;
A switching valve configured to operate the operation rod part at a low pressure or to operate at a high pressure, and to change a flow path to supply or discharge oil to the main cylinder part to operate the operation rod at a low pressure to a high pressure, and a main cylinder part; It is connected to the fixed rod part is equipped with a peristaltic valve having a positive pressure function and a one-way function to open and close when a certain pressure abnormality, a hydraulic pump for supplying oil to the main cylinder and the inner cylinder and a valve control unit for controlling the hydraulic pump and valve And low pressure and high pressure hydraulic cylinder device, characterized in that consisting of an oil tank for storing and supplying oil.

The hydraulic rod of claim 1, wherein the inner rod part is fixed to the fixed rod part by mounting a fixed piston part at the front, and the fixed piston part is inserted into the inner cylinder of the actuating rod part to form a hydraulic flow path so that the actuating rod part can move in the vertical direction. Variable low and high pressure hydraulic cylinder device, characterized in that.

According to claim 1, wherein the valve control unit
At the low pressure of the hydraulic pump, open the peristaltic valve to supply oil to the inner cylinder, and open the selector valve to form a flow path so as to be returned to the main cylinder.
Variable pressure and low pressure characterized in that it is configured to open the peristaltic valve so that the oil is supplied to the main cylinder portion at high pressure at the same time the oil is supplied at the same time to operate the operating rod portion forward to gradually change the force of the operating rod portion from low pressure to high pressure High pressure hydraulic cylinder device.