KR20110074018A - Motor driving type power piston - Google Patents

Abstract

PURPOSE: A motor-driven power piston is provided to prevent cavitation since a plurality of auxiliary cylinders to prevent the generation of bubbles are installed on one side of a cylinder body. CONSTITUTION: A motor-driven power piston comprises a cylinder body(10), a high-pressure piston(20), a piston rod(30), a first pressure spring(41), a low-pressure middle piston(50), a low-pressure back piston(60) and a press head piston(70). A middle block with a central inlet hole is installed in the cylinder body. The cylinder body is divided into a front operating space and a back operating space around the middle block. The high-pressure piston is installed in the front operating space and a through hole is formed on the center of the high-pressure piston. The high-pressure piston reciprocates by hydraulic fluid flowing through the inlet hole of the middle block.

Description

Motor Driving Power Piston {MOTOR DRIVING TYPE POWER PISTON}

The present invention relates to a motor-driven power piston that can be operated only by a driving means such as a motor without a hydraulic supply device for operating a piston such as a compressor, and the hydraulic power is greatly improved.

In general, the power piston is a device that converts the energy of the compressed hydraulic pressure into mechanical reciprocating linear motion. It is a machine that realizes a large output and thrust linear motion by using hydraulic pressure, and is commonly used in machine tools, civil engineering and construction machinery. It is used in combination with pump or control valve, and it can get linear motion more easily than electric linear motor.

As an embodiment of such a motor-driven power piston, Korean Patent Registration No. 0530717 states, “The first and second operating chambers with large diameters and the first and second operating chambers with small diameters are included in the main body. The seal is fitted with a piston with a push rod formed therein to be divided into a first operating chamber having a large diameter and a second operating chamber having a large diameter. The first and second operating chambers having a small diameter are fitted with operating pistons, respectively. The second hydraulic chamber is divided into smaller diameters, and a forward hydraulic inlet is formed at the rear of the main body, and the first hydraulic passage connects the large first operating chamber to the small first operating chamber with a small diameter. The first operating chamber is opened and closed by lifting and lowering of the push rod, and the upper side of the second operating chamber having a large diameter is connected to the upper part of the second operating chamber having a smaller diameter through a second hydraulic passage, and the diameter of the hydraulic passage is located. Big second operation Install the pilot rod valve on one side of the inner surface, the valve piston constituting the pilot rod valve is elastically installed by the spring, the upper and lower parts constitute the upper press portion and the lower press portion, and the lower press portion constitutes the valve contact portion second Pressure increasing cylinder, characterized in that the hydraulic passage can be opened and closed has been published.

However, the conventional power piston is not easy to move due to various equipment to be installed to drive a hydraulic piston such as a hydraulic pump, a hydraulic solenoid, a hydraulic controller, a pneumatic pump, a pneumatic solenoid and a pneumatic controller. Difficult to control, oil spills make working equipment dirty and cause environmental pollution. Also, many expensive equipments are required, which makes it difficult to spread to general small and medium-sized companies in Korea. It is difficult to produce and is dependent on imports from foreign countries.

The present invention has been invented to solve the above problems, to solve the problem to provide a motor-driven power piston that can be operated only by a drive means such as a motor without a device for operating a piston, such as a compressor, the hydraulic output is greatly improved. We assume problem to do.

In addition, to solve the problem to provide a motor-driven power piston to prevent the phenomenon of cavitation by installing a plurality of secondary cylinder for preventing bubbles on one side of the cylinder body.

The present invention, in order to solve the above technical problem, a middle block having an inlet hole in the center is installed inside the cylinder of the sealed type partitioned into the front operation space and the rear operation space of the front center around the middle block A body; A high pressure piston installed in the front operation space and having a through hole formed at a center thereof, the high pressure piston reciprocating back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The front end is blocked and the open rear is connected to the through hole of the high pressure piston, and the hollow hydraulic oil is introduced into the inside, and the front end is installed to the outside front of the cylinder body and is interlocked with the high pressure piston. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted to the center of the low pressure middle piston so that the low pressure middle piston protrudes from the front of the low pressure middle piston so that the lower pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block and the rear end is fixed to the center of the low pressure rear piston. It is installed, the front end is blocked and the rear end is a hollow press head piston of the open type; A second pressing spring fitted to the press head piston and installed between the low pressure middle piston and the low pressure rear piston; A screw is formed along the outer periphery and the front portion is coupled to the inside of the press head piston, and the rear end is provided with the screw being exposed to the outside of the cylinder body; A screw nut coupled to the rear of the low pressure rear piston, the screw portion of the center being fastened to the outer circumferential screw of the transfer screw to move along the screw of the transfer screw while pushing the low pressure rear piston during the rotation operation of the transfer screw; A driving motor installed at an outer end of the cylinder body, a rotating means installed at a rear end of the transfer screw, a rotating means installed at an axial end of the driving motor, and a rotating means installed at a rear end of the transfer screw. Drive means consisting of a power transmission means for connecting a rotation means provided at the shaft end of the motor; The motor-driven power piston characterized in that it is configured to include as a means for solving the problem.

In addition, the rotating means installed corresponding to the rear end of the transfer screw and the shaft end of the drive motor is composed of a pulley, connecting the rotating means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. The power transmission means uses a motor driven power piston characterized in that it comprises a belt as a means of solving the problem.

In addition, the rotation means installed corresponding to the rear end of the transfer screw and the shaft end of the drive motor is composed of a chain sprocket, connecting the rotation means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. The power transmission means is a motor drive power piston, characterized in that consisting of a chain as a solution to the problem.

In addition, the screw formed along the outer periphery of the transfer screw is a motor drive power piston characterized in that the ball screw as a means for solving the problem.

In addition, the middle block is formed with an inflow passage communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, while the inflow path and the front end is in communication An auxiliary cylinder body having an air discharge hole at a rear side thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; The motor-driven power piston, characterized in that the bubble-proof auxiliary cylinder made of an auxiliary piston installed in the rear of the auxiliary pressure spring is installed as a means for solving the problem.

In addition, the middle block is formed with a plurality of inflow passages communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, the inflow path and the front end is An auxiliary cylinder body communicating with the air outlet at the rear; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston, characterized in that a plurality of anti-bubble auxiliary cylinder made of an auxiliary piston installed in the rear of the auxiliary pressure spring is installed as a means for solving the problem.

In addition, a plurality of inlet holes are formed in the middle block, and a plurality of press projections coupled to correspond to the motor driving power piston, characterized in that formed in the tip of the piston head as a solution to the problem.

In addition, a middle block having an inlet hole in the center is installed therein, and the cylinder body of a sealed form partitioned into a front front operating space and a rear rear working space around the middle block; A high pressure piston which is installed in the front working space, and has a through hole formed at a center thereof and moves back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The tip is clogged and the open rear is connected to the through hole of the high pressure piston while being installed in a hollow form to allow hydraulic fluid to flow therein, and the tip is exposed to the outside front of the cylinder body to interlock with the high pressure piston. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted into the center of the low pressure middle piston so that the low pressure middle piston is protruded from the front of the low pressure middle piston so that the low pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block. It is coupled in sequence, the rear end portion exposed to the rear of the outer cylinder body and the screw screw is formed; A second pressing spring coupled to a feed screw to be installed between the low pressure middle piston and the low pressure rear piston; A driving motor installed at an outer end of the cylinder body, a rotation means fastened to a screw at the rear end of the transfer screw, a rotation means installed at a shaft end of the drive motor correspondingly, and a screw at a rear end of the transfer screw. A drive means comprising a power transmission means for connecting the rotation means and the rotation means installed at the shaft end of the drive motor; The motor-driven power piston characterized in that it is configured to include as a means for solving the problem.

In addition, the rotating means installed on the screw of the rear end of the conveying screw is composed of a pulley, the screw corresponding to the screw of the rear end of the conveying screw is formed, the rotating means installed on the shaft end of the drive motor is composed of a pulley, the conveying The power transmission means for connecting the rotation means installed on the screw of the screw and the rotation means installed on the shaft end of the drive motor is a motor drive power piston, characterized in that consisting of a belt as a means of solving the problem.

In addition, the rotating means installed on the screw of the transfer screw is composed of a chain sprocket, the inner periphery of the screw is formed corresponding to the screw of the feed screw and the rotating means installed on the shaft end of the drive motor is composed of a chain sprocket, the transfer screw The power transmission means for connecting the rotating means installed on the rear end of the rotating means and the rotating means installed on the shaft end of the drive motor is characterized in that the motor drive power piston, characterized in that consisting of a chain to solve the problem.

In addition, the screw formed along the outer periphery of the transfer screw is a motor drive power piston characterized in that the ball screw as a means for solving the problem.

In addition, the middle block is formed with an inflow passage communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, while the inflow path and the front end is in communication An auxiliary cylinder body having an air discharge hole at a rear side thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; The motor-driven power piston, characterized in that the bubble-proof auxiliary cylinder made of an auxiliary piston installed in the rear of the auxiliary pressure spring is installed as a means for solving the problem.

In addition, the middle block is formed with a plurality of inflow passages communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, the inflow path and the front end is An auxiliary cylinder body communicating with the air outlet at the rear; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston characterized in that a plurality of anti-bubble auxiliary cylinders formed of auxiliary pistons installed at the rear of the auxiliary pressure springs are provided as a means for solving the problem.

The motor-driven power piston according to the present invention can improve the precise operation and more durable by relatively simple and quick structure by inducing safer and faster operation by the back air pressure when the piston is fed. It is expected that a lot of demand will be due to the replacement of power pistons and the replacement of all hydraulic equipments requiring instantaneous power.

In addition, by using a motor and a ball screw instead of a separate hydraulic and pneumatic device and using oil in a cylinder, a separate hydraulic pneumatic device is not required. It is easy.

In addition, it is very suitable when precise control such as low pressure, high pressure, and moving distance is needed due to motor control, and it can save energy by eliminating unnecessary use of several pneumatic units. By preventing spills, work equipment can be kept clean and environmental pollution can be reduced.

In addition, it has the same effect as the conventional hydraulic system and the price is about 1/3 times more economical. In the existing power piston, when the return is limited, it restricts the hydraulic oil by using a check valve to reduce the cavitation inside the power piston. Although prevented, the motor-driven power piston according to the present invention can bring a more rapid and durable improvement by using a pneumatic piston in the precious hydraulic fluid.

The present invention includes a sealed cylinder body having a middle block provided with an inlet hole in a center thereof and partitioned into a front working space in the front and a rear working space in the rear about the middle block; A high pressure piston installed in the front operation space and having a through hole formed at a center thereof, the high pressure piston reciprocating back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The tip is clogged and the open rear is connected to the through hole of the high pressure piston and installed in a hollow form to allow hydraulic fluid to flow therein. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted to the center of the low pressure middle piston so that the low pressure middle piston protrudes from the front of the low pressure middle piston so that the lower pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block and the rear end is fixed to the center of the low pressure rear piston. It is installed, the front end is blocked and the rear end is a hollow press head piston of the open type; A second pressing spring fitted to the press head piston and installed between the low pressure middle piston and the low pressure rear piston; A screw is formed along the outer periphery and the front portion is coupled to the inside of the press head piston, and the rear end is provided with the screw being exposed to the outside of the cylinder body; A screw nut coupled to the rear of the low pressure rear piston, the screw portion of the center being fastened to the outer circumferential screw of the transfer screw to move along the screw of the transfer screw while pushing the low pressure rear piston during the rotation operation of the transfer screw; A driving motor installed at an outer end of the cylinder body, a rotating means installed at a rear end of the transfer screw, a rotating means installed at an axial end of the driving motor, and a rotating means installed at a rear end of the transfer screw. Drive means consisting of a power transmission means for connecting a rotation means provided at the shaft end of the motor; The motor driving power piston, which is configured to include, is a feature of the technical configuration.

In addition, the rotating means installed corresponding to the rear end of the transfer screw and the shaft end of the drive motor is composed of a pulley, connecting the rotary means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. The power transmission means is characterized by a motor-driven power piston composed of a belt as a technical construction.

In addition, the rotation means installed corresponding to the rear end of the transfer screw and the shaft end of the drive motor is composed of a chain sprocket, connecting the rotation means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. The power transmission means is characterized by the technical configuration of the motor driven power piston consisting of a chain.

In addition, a motor-driven power piston whose screw is formed along the outer circumference of the transfer screw is composed of a ball screw is characterized by a technical configuration.

In addition, the middle block is formed with an inflow passage communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, while the inflow path and the front end is in communication An auxiliary cylinder body having an air discharge hole at a rear side thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston in which an auxiliary cylinder for preventing bubbles formed of an auxiliary piston installed in the rear of the auxiliary pressure spring is installed is characterized by a technical configuration.

In addition, the middle block is formed with a plurality of inflow passages communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, the inflow path and the front end is An auxiliary cylinder body communicating with the air outlet at the rear; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston having a plurality of anti-foaming auxiliary cylinders formed of an auxiliary piston installed at the rear of the auxiliary pressure spring is characterized by a technical configuration.

In addition, the middle block is formed with a plurality of inlet holes, and a plurality of press projections coupled to correspond to the motor-driven power piston formed at the tip of the press head piston is characterized by the technical configuration.

In addition, a middle block having an inlet hole in the center is installed therein, and the cylinder body of a sealed form partitioned into a front front operating space and a rear rear working space around the middle block; A high pressure piston which is installed in the front working space, and has a through hole formed at a center thereof and moves back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The tip is clogged and the open rear is connected to the through hole of the high pressure piston while being installed in a hollow form to allow hydraulic fluid to flow therein, and the tip is exposed to the outside front of the cylinder body to interlock with the high pressure piston. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted into the center of the low pressure middle piston so that the low pressure middle piston is protruded from the front of the low pressure middle piston so that the low pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block. It is coupled in sequence, the rear end portion exposed to the rear of the outer cylinder body and the screw screw is formed; A second pressing spring coupled to a transfer screw to be installed between the low pressure middle piston and the low pressure rear piston; A driving motor installed at an outer end of the cylinder body, a rotation means fastened to a screw at the rear end of the transfer screw, a rotation means installed at a shaft end of the drive motor correspondingly, and a screw at a rear end of the transfer screw. A drive means comprising a power transmission means for connecting the rotation means and the rotation means installed at the shaft end of the drive motor; The motor driving power piston, which is configured to include, is a feature of the technical configuration.

In addition, the rotating means installed on the screw of the rear end of the conveying screw is composed of a pulley, the screw corresponding to the screw of the rear end of the conveying screw is formed, the rotating means installed on the shaft end of the drive motor is composed of a pulley, the conveying The power transmission means for connecting the rotating means installed on the screw of the screw and the rotating means installed on the shaft end of the drive motor is characterized by a motor-driven power piston composed of a belt.

In addition, the rotating means installed on the screw of the transfer screw is composed of a chain sprocket, the inner periphery of the screw is formed corresponding to the screw of the feed screw and the rotating means installed on the shaft end of the drive motor is composed of a chain sprocket, the transfer screw The power transmission means for connecting the rotating means installed on the rear end of the rotary motor and the rotating means installed on the shaft end of the drive motor is characterized by a motor-driven power piston consisting of a chain.

In addition, a motor-driven power piston whose screw is formed along the outer circumference of the transfer screw is composed of a ball screw is characterized by a technical configuration.

In addition, the middle block is formed with an inflow passage communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, while the inflow path and the front end is in communication An auxiliary cylinder body having an air discharge hole at a rear side thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston in which an auxiliary cylinder for preventing bubbles formed of an auxiliary piston installed in the rear of the auxiliary pressure spring is installed is characterized by a technical configuration.

In addition, the middle block is formed with a plurality of inflow passages communicating with the outer end of the middle block and the rear end of the middle block, the outer side of the cylinder body, which is installed corresponding to the inflow path, the inflow path and the front end is An auxiliary cylinder body communicating with the air outlet at the rear; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston having a plurality of anti-foaming auxiliary cylinders formed of an auxiliary piston installed at the rear of the auxiliary pressure spring is characterized by a technical configuration.

Hereinafter, a configuration of a motor driving power piston according to the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view according to a first embodiment of the present invention, Figures 2 and 3 are shown as an operating state diagram according to the first embodiment of the present invention, the motor driving power piston according to the present invention is installed in the middle The cylinder body 10 is formed in a sealed shape divided into a front operating space 11 and a rear operating space 12 back and forth around the block 13, and a high pressure piston installed in the front operating space 11 ( 20), a piston rod 30 connected to the front of the high pressure piston 20, a first pressure spring 41 installed between the inner body of the cylinder body 10 and the high pressure piston 20, and Low pressure middle piston 50 installed in front of the rear working space 12, low pressure rear piston 60 installed in the rear of the rear working space 12, the low pressure middle piston 50 and the low pressure rear piston ( Press head piston 70 is connected to 60 and the low pressure middle piston (50) And a second pressing spring 42 installed between the low pressure rear piston 60 and a front screw coupled to the inside of the press head piston 70 and a rear end of the transfer screw exposed to the outside rear of the cylinder body 10. (80), a screw nut (90) coupled to the rear of the low pressure rear piston (60) to be in close contact with the rear of the low pressure rear piston (60), and a transfer screw (80) connected to the rear end of the transfer screw (80). It consists of a driving means 100 for transmitting a rotation to.

The cylinder body 10, the middle block 13 is installed in front of the middle point inside the front compartment space 11, the high-pressure piston 20 is moved forward and backward reciprocating around the middle block (13) The rear working space 12 is formed at the rear, and the low pressure middle piston 50 and the low pressure rear piston 60 reciprocate back and forth.

In the center of the middle block 13, the inlet hole 14 corresponding to the tip of the press head piston 70 is formed so that the hydraulic oil can be freely introduced into the front operating space 11 and the rear operating space 12, One end of the outer periphery forms an inflow passage 15 in which one end of the rear side and the outer periphery communicate with each other so that hydraulic hydraulic oil in the rear working space 12 may be introduced into the auxiliary cylinder body 201 through the inflow passage 15.

The inflow path 15 is connected to a through hole formed in the auxiliary cylinder body 201 of the bubble prevention auxiliary cylinder 200, and is installed in the number of installations of the bubble prevention auxiliary cylinder 200 installed in the cylinder body 10. Accordingly, when one bubble preventing auxiliary cylinder 200 is installed, one is installed, and when the bubble preventing auxiliary cylinder 200 is installed in plural, a plurality is installed.

The bubble preventing auxiliary cylinder 200, the auxiliary cylinder body 201 is installed on the outer end of the middle block 13, the auxiliary pressure spring 203 is installed in front of the inside of the auxiliary cylinder body 201, and the auxiliary It is composed of an auxiliary piston 204 installed immediately behind the pressure spring 203.

The outer end of the auxiliary cylinder body 201 is formed in communication with the inside of the through-hole matching the inflow path 15 of the middle block 13, the rear end is formed with an air discharge hole 202 in communication with the inside is formed. .

In addition, the front end of the auxiliary pressure spring 203 is in close contact with the inside front of the auxiliary cylinder body 201 and the rear end of the auxiliary pressure spring 203 is in close contact with the front of the auxiliary piston 204.

The high pressure piston 20 installed in the front working space 11 is initially located at the rear of the front working space 11, and then the hydraulic oil in the rear working space 12 operates forward through the inlet hole 14. When the gas flows into the space 11, the hydraulic fluid is used to advance the front of the front working space 11. A through hole is formed in the center of the high pressure piston 20, and a piston rod is disposed in front of the high pressure piston 20. 30 are combined.

The piston rod 30, the front end is installed exposed to the outside front of the cylinder body 10, the rear end is installed corresponding to the through-hole in the center of the high pressure piston 20, the front end is blocked and the rear end is the high pressure piston 20 It is formed in an open form so as to communicate with the through hole of the hollow is formed so that the hydraulic fluid flows into the inside.

Therefore, the hydraulic oil introduced into the front working space 11 pushes the high pressure piston 20 forward and is also introduced into the piston rod 30 through the through-hole of the high pressure piston 20, thereby introducing the piston rod 30. The front end of the piston rod 30 pushed forward and exposed to the outside of the cylinder body 10 is advanced by a predetermined distance.

On the other hand, the front end of the front operating space 11, the front end is in close contact with the front of the inside of the cylinder body 10, the rear end is coupled to the piston rod 30 so as to be in close contact with the front of the high-pressure piston (20) 41) is installed.

The low pressure middle piston 50 is located in front of the rear working space 12 and the low pressure rear piston 60 is located at the rear of the rear working space 12, and the middle and rear pistons of the low pressure middle piston 50 The press head piston 70 is coupled to 60.

In this case, the low pressure middle piston 50 and the press head piston 70 are separated, and the press head piston 70 can move forward and backward along the through hole of the low pressure middle piston 50, and the press head piston 70 ) Is protruded from the front of the low pressure middle piston 50 to be coupled to the inlet hole 14 of the middle block (13).

In addition, the low pressure rear piston 60 is fixedly installed at the rear end of the press head piston 70 so that the low pressure rear piston 60 can move forward together, and the front end of the press head piston 70 is blocked and the rear is Open hollow is formed in the hollow shape so that the transfer screw 80 can be coupled therein.

The second pressure spring 42 is installed between the low pressure middle piston 50 and the low pressure rear piston 60 by pushing the second pressure spring 42 while advancing the low pressure rear piston 60. ) Allows the low pressure middle piston 50 to push forward.

Of course, the second pressure spring 42 is installed to be in close contact between the low pressure middle piston 50 and the low pressure rear piston 60 in a state of being fitted to the press head piston 70.

The front portion of the transfer screw 80 is coupled to the inside of the press head piston 70, the rear end is exposed to the outside of the rear of the cylinder body 10, the rear end portion is formed with a ball screw along the outer periphery.

The portion exposed to the rear outside of the cylinder body 10 at the rear end of the transfer screw 80 is connected to the driving means 100 so that the transfer screw 80 is rotated by the driving means 100.

The driving means 100, the driving motor 101 is installed on one side of the rear of the cylinder body 10, the rotating means 102 and the rear end of the transfer screw 80 is installed on the front end of the drive motor 101. The rotating means 102 is installed on the exposed portion of the cylinder body 10 outside the rear of the cylinder body, and the rotating means 102 and the conveying screw 80, the cylinder body 10 is installed on the shaft end of the drive motor 101 ) Is configured as a power transmission means 103 for connecting the rotating means 102 installed in the portion exposed to the outside rearward.

Here, the rotating means 102 installed on the exposed portion of the front end of the drive motor 101 and the rear end of the cylinder body 10 of the rear end of the transfer screw 80 is composed of any one selected from a pulley or a chain sprocket. Power transmission means for connecting the rotation means 102 is installed at the end of the drive motor 101 and the rotating means 102 installed on the exposed portion of the rear end of the cylinder body 10 at the rear end of the transfer screw 80. 103 is composed of a belt or chain in correspondence with the rotating means 102.

4 is a cross-sectional view according to the second embodiment of the present invention, a plurality of press projections 71 are formed at the tip of the press head piston 70, and the middle block corresponding to the press projections 71. Also, a plurality of inlet holes 14 are formed in (13). In this case, as in the first embodiment, the force of the high pressure is improved even more than when the front end of the press head piston 70 is coupled to the single inlet hole 14. Can be exercised.

Figure 5 is a cross-sectional view according to a third embodiment of the present invention, Figures 6 and 7 are shown as an operating state diagram according to a third embodiment of the present invention, the component and the drive installed in the rear operating space 12 The configuration is the same as that of the first embodiment except for the means 100.

The third embodiment includes a cylinder body 10 partitioned into a front operating space 11 and a rear operating space 12 around the same middle block 13 as the constituent members of the first embodiment, and the middle block 13. And an air bubble preventing auxiliary cylinder 200 installed corresponding to the inflow path 15 of the c), and a member and a driving means 100 installed in the rear working space 12 different from the member of the first embodiment. Looking at in more detail with respect to the component and the drive means 100 installed in the rear working space 12 different from the first embodiment as follows.

That is, before and after the rear working space 12, the low pressure middle piston 50 and the low pressure rear piston 60 are installed, and between the low pressure middle piston 50 and the low pressure rear piston 60, the second pressure spring ( 42 is installed, the transfer screw 80 is coupled to the center of the low pressure middle piston 50 and the low pressure rear piston (60).

The tip of the conveying screw 80 is coupled to the conveying screw 80 in an unsecured state so as to be able to operate back and forth along the through-hole of the low pressure middle piston 50, wherein the distal end portion is the middle block 13. It is coupled in a protruding state than the front of the low pressure middle piston 50 so that it can be coupled to the inlet 14 of.

The low pressure rear piston 60 and the stopper 300 are sequentially fixed to the rear end of the conveying screw 80 at a predetermined interval with the low pressure middle piston 50, and the rear end of the conveying screw 80 is the cylinder body 10. The ball screw is formed along the outer circumference of the exposed part while being installed in the state exposed to the rear outside.

The portion exposed to the rear of the cylinder body 10 outside the rear end of the transfer screw 80 is connected to the drive means 100 for transmitting the rotation to the transfer screw (80).

The drive means 100, the drive motor 101 is installed at the rear outer end of the cylinder body 10, the outer end of the cylinder body 10 of the shaft end and the rear end of the feed screw 80 to the drive motor 101. Rotating means 102 is installed on the exposed portion, and the rotating means 102 and the rear end of the cylinder body 10 of the rear end of the rotary screw 102 and the transfer screw 80 is installed on the drive motor 101 in the exposed portion It consists of a power transmission means 103 for connecting the rotating means 102.

Here, the rotating means 102 installed on the screw in the portion exposed to the rear of the cylinder body 10 outside the rear end of the transfer screw 80 is a pulley or chain with a screw corresponding to the screw of the transfer screw 80 in the inner circumference It is composed of any one selected from the sprockets, the rotating means 102 arranged on the shaft end of the drive motor 101 corresponding to the rear end screw of the feed screw 80 is composed of any one selected from the pulley or chain sprocket.

And the power transmission means 103 for connecting the rotating screw 102 is installed on the screw of the rear end of the feed screw 80 and the drive motor 101 is composed of a belt when the rotating means 102 is a pulley and rotates If the means 102 are chain sprockets, they consist of a chain.

As described in detail above, the motor driving power piston according to the present invention can be operated only by the driving means 100 without a compressor (compressor), and the hydraulic output is greatly improved, and the motor driving according to the present invention with reference to the accompanying drawings below. The operation of the power piston is as follows.

As shown in FIGS. 1 to 3, when power is supplied to the driving motor 101, the shaft of the driving motor 101 rotates as shown in FIG. 2, and the rotational force is the rotating means 102 installed at the shaft end of the driving motor 101. Is passed on.

The rotational force transmitted to the rotating means 102 installed at the shaft end of the drive motor 101 is driven by the rotating means 102 installed at the shaft end of the drive motor 101 and the rotating means 102 installed at the rear end of the transfer screw 80. It is connected by the transmission means 103, it is transmitted to the transfer screw 80 via the rotation means 102 of the transfer screw 80 along the power transmission means 103.

When the feed screw 80 rotates in this way, the screw nut 90 moves the feed screw 80 forward along the outer circumferential ball screw, so that the low pressure rear piston 60 also moves forward and the low pressure rear piston 60. ) Compresses the second pressing spring 42 at the rear while advancing with the screw nut 90.

When the second pressure piston 42 compressed by the forward operation of the low pressure rear piston 60 is compressed by a predetermined force or more, the low pressure middle piston 50 is pushed forward as shown in FIG. L1 ”and at the same time the high pressure piston 20 is pushed to“ L2 ”.

At this time, the hydraulic hydraulic oil in front of the rear operating space 12 is introduced into the front operating space 11 through the inlet hole 14 of the middle block 13 at the same time as the low pressure middle piston 50 advances. Is introduced into the auxiliary cylinder body 201 through the inlet path 15 of the middle block (13).

And when the low pressure middle piston 50 is in close contact with the front of the rear operation space 12 as shown in Figure 3 the front end of the press head piston 70 is coupled to the inlet hole 14 while the space of the inlet hole 14 is closed circuit Becomes a high pressure force.

At this time, the low pressure middle piston 50 is continuously pushed from the rear, but the low pressure middle piston 50 is in close contact with the front of the rear working space 12 and can no longer move forward, in conjunction with the inlet hole 14 through The hydraulic oil introduced into the front working space 11 pushes the high pressure piston 20 forward.

The high pressure piston 20 is pushed forward by the hydraulic pressure to reduce the pressure by pressing the first pressure spring 41, and the piston rod 30 is advanced by the forward distance of the high pressure piston 20, so that the outer front of the cylinder body 10 The tip of the exposed piston rod 30 is advanced.

Here, according to Pascal's theorem, when an external cross of "D" cross section "R" distance enters the space of the hydraulic hole 14 of the middle block 13, the "M" plane by the amount entered by Pascal's theorem. When distributed to, the high pressure piston 20 moves by Y. If R × D = M × Y, the “D” cross section is R / 10. If the “D” cross section has a force of 100kg, M The cross section has a force of 100 kg × 10 = 1000 kg, where the Y distance is 10 times smaller than the “R” distance, but the force of the “D” cross section is transmitted to the “M” cross section and amplified 10 times.

On the contrary, when the driving motor 101 rotates in the opposite direction to the forward operation of the low pressure rear piston 60, the high-pressure piston 20, which has been advanced, is retracted again, and the screw nut 90 is formed on the outer circumference of the feed screw 80. At the end of the press head piston 70, which moves backward along the screw, the low pressure rear piston 60 connected to the screw nut 90 is also backward, and the press head piston 70 is also reversed and coupled to the inlet 14. This is a total departure.

Here, the first pressure spring 41, which has been reduced, helps to return the high pressure piston 20 as it is extended again, but at the moment when the low pressure middle piston 50 moves backward, vacuum is introduced in the inlet hole 14 of the middle block 13. However, the hydraulic oil inside the auxiliary cylinder body 201 is introduced into the rear working space 12 through the inflow path 15 to remove the vacuum, and the auxiliary piston 204 is then moved forward.

The vacuum is lost by the amount of hydraulic oil moved from the auxiliary cylinder body 201 to the rear working space 12, and when a low pressure occurs in the fluid, the gas contained in the hydraulic oil is discharged from the hydraulic oil. It is possible to prevent the cavitation of gathering in the place where the pressure is low and the empty space without the hydraulic fluid due to this.

At the same time, the low pressure middle piston 50 is naturally retracted, and when the tip of the press head piston 70 completely exits the hydraulic hole 14, the high pressure piston 20 returns to the rear of the front working space 11. When the low pressure rear piston 60 moves forward in the next operation, the hydraulic fluid is first filled in the auxiliary cylinder body 201 first, and the above-described cycle is repeated.

4 is a cross-sectional view according to the second embodiment of the present invention, the operation is the same as the first embodiment, but a plurality of press projections 71 are formed at the tip of the press head piston 70 and corresponding thereto Since a plurality of inlet holes 14 are formed in the middle block 13, and a plurality of press protrusions 71 are coupled to the plurality of inlet holes 14, the front end of the press head piston 70 is coupled to the inlet hole 14. High pressure occurs than when.

5 to 7, as shown in the third embodiment, when the drive motor 101 is driven, the rotary means 102 built in the shaft end of the drive motor 101 is rotated and connected to the power transmission means 103 The rotating means 102 fastened to the ball screw at the rear end of the feed screw 80 is rotated.

By the rotation operation of the rotating means 102 fastened to the rear end screw of the transfer screw 80, the transfer screw 80 is transferred along the screw formed on the inner circumference of the rotating means 102, at this time the transfer screw 80 The low pressure rear piston 60 fixed to the rear advances with the transfer screw 80 and presses the second pressing spring 42 installed at the front.

When the second pressure piston 42 compressed by the forward pressure of the low pressure rear piston 60 is compressed by a predetermined force or more, the low pressure middle piston 50 is pushed forward as shown in FIG. 6, and the low pressure middle piston 50 is “ L1 ”and at the same time the high pressure piston 20 is pushed to“ L2 ”.

And when the low pressure middle piston 50 is in close contact with the front of the rear operating space 12 as shown in Figure 7 the front end of the transfer screw 80 is coupled to the inlet hole 14, the space of the inlet hole 14 is closed circuit And a high pressure force is generated.

Further, the low pressure middle piston 50 is continuously pushed from the rear, but since the low pressure middle piston 50 is brought into close contact with the front of the rear working space 12, it is no longer able to move forward, and the inlet hole ( The hydraulic oil introduced into the front working space 11 through 14) pushes the high pressure piston 20 forward.

The high pressure piston 20 is pushed forward by the hydraulic pressure to reduce the pressure by pressing the first pressure spring 41 and the piston rod 30 is moved forward to the outside of the cylinder body 10 by the entire distance of the high pressure piston 20. Go further.

Here, according to Pascal's theorem, when the cross section of the "D" cross section "R" distance enters the "N" space, the high pressure piston 20 is distributed on the "M" plane by the amount entered by Pascal's theorem. If you move R by Y and R × D = M × Y, the “D” cross section is R / 10. If the “D” cross section has 100kg of force, the M cross section is 100kg × 10 = 1000kg. Will have power.

Here, the Y distance is 10 times smaller than the “R” distance, but the force of the “D” cross section is transmitted to the “M” cross section and amplified 10 times.

On the contrary, when the drive motor 101 rotates in the opposite direction to the forward operation of the low pressure rear piston 60, the high-pressure piston 20, which has been advanced, moves backward again, and the rotating means fastened to the rear end ball screw of the feed screw 80 ( The feed screw 80 is moved backward along the screw of the rotating means 102 by the rotation of the 102, at this time, the low pressure rear piston 60 is also back together with the feed screw 80 coupled to the inlet hole 14 The tip of is completely separated from the inlet hole (14).

Here, the first pressure spring 41, which has been reduced, helps to return the high pressure piston 20 while it is elongated again, but a vacuum phenomenon occurs in the inlet hole 14 at the moment when the low pressure middle piston 50 moves backward. Hydraulic hydraulic oil in the auxiliary cylinder body 201 is introduced into the rear working space 12 through the inflow path 15 to remove the vacuum and the auxiliary piston 204 is advanced forward.

The vacuum is lost by the amount of hydraulic oil moved from the auxiliary cylinder body 201 to the rear working space 12, and when a low pressure occurs in the fluid, the gas contained in the hydraulic oil is discharged from the hydraulic oil. It is possible to prevent the cavitation of gathering in the place where the pressure is low and the empty space without the hydraulic fluid due to this.

At the same time, the low pressure middle piston 50 is naturally retracted, and when the tip of the conveying screw 80 completely escapes the hydraulic hole 14, the high pressure piston 20 is returned to the rear of the front working space 11. When the low pressure rear piston 60 is advanced again in the next operation, the hydraulic oil is first filled in the auxiliary cylinder body 201, and the above-described cycle is repeated.

1 is a cross-sectional view according to a first embodiment of the present invention.

2 and 3 is an operating state diagram according to the first embodiment of the present invention.

4 is a cross-sectional view according to a second embodiment of the present invention.

5 is a cross-sectional view according to a third embodiment of the present invention.

6, 7 is an operating state diagram according to a third embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: cylinder body 11: front operating space 12: rear operating space

13: Middle block 14: Inlet 15: Inlet

20: high pressure piston 30: piston rod 41: first pressure spring

42: second pressure spring 50: low pressure middle piston 60: low pressure rear piston

70: press head piston 71: press protrusion 80: feed screw

90: screw nut 100: drive means 101: drive motor

102: rotation means 103: power transmission means 200: bubble preventing auxiliary cylinder

201: auxiliary cylinder body 202: air discharge hole 203: auxiliary pressure spring

204: auxiliary piston 300: stopper

Claims (13)

A middle block having a middle block provided with an inlet hole in the center thereof, the cylinder body being enclosed into a front front working space and a rear rear working space around the middle block; A high pressure piston installed in the front operation space and having a through hole formed at a center thereof, the high pressure piston reciprocating back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The front end is blocked and the open rear is connected to the through hole of the high pressure piston, and the hollow hydraulic oil is introduced into the inside, and the front end is installed to the outside front of the cylinder body and is interlocked with the high pressure piston. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted to the center of the low pressure middle piston so that the low pressure middle piston protrudes from the front of the low pressure middle piston so that the lower pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block and the rear end is fixed to the center of the low pressure rear piston. It is installed, the front end is blocked and the rear end is a hollow press head piston of the open type; A second pressing spring fitted to the press head piston and installed between the low pressure middle piston and the low pressure rear piston; A screw is formed along the outer periphery and the front portion is coupled to the inside of the press head piston, and the rear end is provided with the screw being exposed to the outside of the cylinder body; A screw nut coupled to the rear of the low pressure rear piston, the screw portion of the center being fastened to the outer circumferential screw of the transfer screw to move along the screw of the transfer screw while pushing the low pressure rear piston during the rotation operation of the transfer screw; A driving motor installed at an outer end of the cylinder body, a rotating means installed at a rear end of the transfer screw, a rotating means installed at an axial end of the driving motor, and a rotating means installed at a rear end of the transfer screw. Drive means consisting of a power transmission means for connecting a rotation means provided at the shaft end of the motor; Motor driven power piston, characterized in that configured to include. The method according to claim 1, Rotating means installed on the rear end of the transfer screw and the shaft end of the drive motor is composed of a pulley, the power transmission for connecting the rotary means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. Motor-driven power piston, characterized in that the means consists of a belt. The method according to claim 1, Rotating means installed on the rear end of the transfer screw and the shaft end of the drive motor is composed of a chain sprocket, the power connecting the rotary means installed on the rear end of the transfer screw and the corresponding rotation means installed on the shaft end of the drive motor correspondingly. The motor drive power piston, characterized in that the transmission means is composed of a chain. The method according to claim 1, The screw formed along the outer circumference of the feed screw is a motor drive power piston, characterized in that the ball screw. The method according to any one of claims 1 to 4, The middle block is formed with an inflow path communicating the outer end of the middle block and the rear end of the middle block, On the outside of the cylinder body, An auxiliary cylinder body, which is installed corresponding to the inflow path, and has an air discharge hole at a rear side thereof while communicating with the inflow path and one front end thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; Motor-driven power piston, characterized in that the auxiliary cylinder for preventing bubbles made of an auxiliary piston is installed behind the auxiliary pressure spring. The method according to any one of claims 1 to 4, The middle block is formed with a plurality of inflow passages communicating the outer end of the middle block and the rear end of the middle block, On the outside of the cylinder body, An auxiliary cylinder body, which is installed corresponding to the inflow path, and has an air discharge hole at a rear side thereof while communicating with the inflow path and one front end thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston, characterized in that a plurality of anti-bubble auxiliary cylinder made of an auxiliary piston is installed behind the auxiliary pressure spring. The method according to any one of claims 1 to 4, And a plurality of inlet holes are formed in the middle block, and a plurality of press projections coupled to the middle block are formed at the tip of the press head piston. A middle block having a middle block provided with an inlet hole in the center thereof, the cylinder body being enclosed into a front front working space and a rear rear working space around the middle block; A high pressure piston which is installed in the front working space, and has a through hole formed at a center thereof and moves back and forth by hydraulic hydraulic oil flowing in and out through the inlet hole of the middle block; The tip is clogged and the open rear is connected to the through hole of the high pressure piston while being installed in a hollow form to allow hydraulic fluid to flow therein, and the tip is exposed to the outside front of the cylinder body to interlock with the high pressure piston. An actuated piston rod; A first pressing spring coupled to the piston rod to be installed between the cylinder body front and the high pressure piston; A low pressure middle piston installed in front of the rear operating space; A low pressure rear piston installed at the rear of the low pressure middle piston; The front end is fitted into the center of the low pressure middle piston so that the low pressure middle piston is protruded from the front of the low pressure middle piston so that the low pressure middle piston moves forward and backward, and the front end is correspondingly coupled to the inlet hole of the middle block. It is coupled in sequence, the rear end portion exposed to the rear of the outer cylinder body and the screw screw is formed; A second pressing spring coupled to a transfer screw to be installed between the low pressure middle piston and the low pressure rear piston; A driving motor installed at an outer end of the cylinder body, a rotation means fastened to a screw at the rear end of the transfer screw, a rotation means installed at a shaft end of the drive motor correspondingly, and a screw at a rear end of the transfer screw. A drive means comprising a power transmission means for connecting the rotation means and the rotation means installed at the shaft end of the drive motor; Motor driven power piston, characterized in that configured to include. The method according to claim 8, The rotating means installed on the screw of the rear end of the conveying screw is composed of a pulley, the inner periphery of the screw is formed corresponding to the screw of the rear end of the conveying screw, the rotating means installed on the shaft end of the drive motor is composed of a pulley, The power transmission means for connecting the rotating means installed on the screw and the rotating means installed on the shaft end of the drive motor is a motor driven power piston, characterized in that consisting of a belt. The method according to claim 8, The rotating means installed on the screw of the conveying screw is composed of a chain sprocket, but a screw corresponding to the screw of the conveying screw is formed on the inner circumference, and the rotating means installed on the shaft end of the driving motor is composed of a chain sprocket. Power transmission means for connecting the rotating means installed on the shaft and the rotating means installed on the shaft end of the drive motor is a motor driven power piston, characterized in that consisting of a chain. The method according to claim 8, The screw formed along the outer circumference of the feed screw is a motor drive power piston, characterized in that the ball screw. The method according to any one of claims 8 to 11, The middle block is formed with an inflow path communicating the outer end of the middle block and the rear end of the middle block, On the outside of the cylinder body, An auxiliary cylinder body, which is installed corresponding to the inflow path, and has an air discharge hole at a rear side thereof while communicating with the inflow path and one front end thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; Motor-driven power piston, characterized in that the auxiliary cylinder for preventing bubbles made of an auxiliary piston is installed behind the auxiliary pressure spring is installed. The method according to any one of claims 8 to 11, The middle block is formed with a plurality of inflow passages communicating the outer end of the middle block and the rear end of the middle block, On the outside of the cylinder body, An auxiliary cylinder body, which is installed corresponding to the inflow path, and has an air discharge hole at a rear side thereof while communicating with the inflow path and one front end thereof; An auxiliary pressure spring installed inside the front of the auxiliary cylinder body; A motor-driven power piston, characterized in that a plurality of anti-bubble auxiliary cylinder made of an auxiliary piston is installed behind the auxiliary pressure spring.

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