KR200447709Y1 - Differential motion type cylinder - Google Patents

Differential motion type cylinder Download PDF

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Publication number
KR200447709Y1
KR200447709Y1 KR2020090011272U KR20090011272U KR200447709Y1 KR 200447709 Y1 KR200447709 Y1 KR 200447709Y1 KR 2020090011272 U KR2020090011272 U KR 2020090011272U KR 20090011272 U KR20090011272 U KR 20090011272U KR 200447709 Y1 KR200447709 Y1 KR 200447709Y1
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KR
South Korea
Prior art keywords
cylinder
diameter
fluid
hole
connector
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Application number
KR2020090011272U
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Korean (ko)
Inventor
문정옥
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문정옥
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Priority to KR2020090011272U priority Critical patent/KR200447709Y1/en
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Publication of KR200447709Y1 publication Critical patent/KR200447709Y1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

The present invention relates to a cylinder in which a working fluid is introduced into a cylinder to reciprocate a piston and an actuating rod, each having actuating rods on both sides of the cylinder and allowing the left and right actuating rods to operate differentially, that is, sequentially. .

Conventional general cylinder has one operating rod on one side of the cylinder, the operating rod can be seen to reciprocate in the cylinder direction.

Therefore, although two cylinders are used in a mechanical mechanism that requires two operations, the present invention usually requires two cylinders to drive a mechanical mechanism that immediately performs another operation after one operation is completed. In order to realize this, the present invention has the following configuration.

The first piston 13 and the first operating rod 14 and the second piston 16 and the second operating rod 17 is fixed to the inside of the cylinder 11,

The first and second actuating rods 14 and 17 protrude out of the cylinder 11, and the first and second actuating rods 14 and 17 are movable to support the first and second actuating rods 14 and 17 at both ends of the cylinder 11. 1, has a second working rod support (15, 18),

Both sides of the cylinder 11 have first and second inlet holes 21 and 23 for supplying or discharging a working fluid to the cylinder 11, and in the first and second inlet holes 21 and 23, respectively. In the cylinder having a differential function is connected to the first inlet pipe 22 and the second inlet pipe 24 is connected to the connector 25,

The first input pipe 22 such that the pressure of the fluid supplied to the cylinder 11 through the first input pipe 22 is greater than the pressure of the fluid supplied to the cylinder 11 through the second input pipe 24. The diameter (D 1 ) of the fluid through hole of the second through tube 24 is formed to be larger than the diameter (D 2 ) of the fluid through hole of the second inlet pipe (24),

The central connector 32 is provided with a central connector 32 having a central hole 31 in the center of the cylinder 11, and the central connector 32 protrudes into the cylinder 11 to form first and second operating rods 14 and 17. Has a stopper 33 for preventing the movement of

The diameter (D 3 ) of the central hole 31 is to be formed larger than the diameter (D 1 ) of the first injection pipe 22 for supplying fluid to the cylinder (11).

Cylinder mechanism, hydraulic cylinder, pneumatic cylinder, piston

Description

Differential motion type cylinder

The present invention is a cylinder for reciprocating the piston and the operating rod by introducing the working fluid into the cylinder, each having a respective working rod on the left and right sides of the cylinder, the left and right working rods are sequentially operated from one of the left and right at a differential operation, that is, at intervals It relates to a cylinder to be operated.

The present invention is a cylinder for driving a mechanism that performs the operation of the other after the operation of one end, in the prior art using two cylinders to see that the operation of the mechanism by operating each of them with a time difference The idea is to make this a single cylinder.

Generally, a cylinder can be classified into a hydraulic cylinder and a pneumatic cylinder according to whether the working fluid is fluid or air. A piston and an actuating rod reciprocating by the working fluid are located inside the hydraulic cylinder or the pneumatic cylinder (hereinafter abbreviated as cylinder). It is connected to the actuating mechanism to be operated at the end of the actuating rod to drive the actuating mechanism by reciprocating the piston inside the cylinder.

Conventional general cylinders have one operating rod on one side of the cylinder, and perform only one operation with a reciprocating operating rod.

Therefore, although two cylinders are used in a mechanical mechanism requiring two operations, the present invention realizes that one cylinder normally requires two cylinders in a mechanical mechanism that immediately performs another operation after one operation is completed. It is so long.

In particular, the present invention is the applicant's pre-registered utility model

Utility Model Registration No. 20-0444599 (Registration Date 2009. 5. 15)

Name of the invention: The "cylinder with differential function" was further developed.

The present invention is to drive the operating mechanism with a piston of a cylinder acting as a pressure fluid or compressed air and an actuating rod reciprocated therein, each actuating rod is formed on both sides of one cylinder and the actuating rod is It is to provide a cylinder to operate sequentially.

Conventional cylinders have one operating rod in one cylinder, so that only one operating mechanism is driven.

Therefore, the present invention, which had to have two cylinders to drive two operating mechanisms, was designed to form two operating rods acting independently of each other on one cylinder, and to be operated in succession one after another.

The present invention is realized by using two cylinders or using multiple valves in the related art, so that the operation that is cumbersome and difficult to operate is realized by one cylinder, thereby simplifying and accuracy of operation. At the same time provide.

Referring to the present invention in detail as follows.

It has a first operating rod 14 for fixing the first piston 13 and the second operating rod 17 for fixing the second piston 16 inside the cylinder 11,

Both ends of the first and second operating rods 14 and 17 protrude out of the cylinder 11, and both ends of the cylinder 11 support the first and second operating rods 14 and 17 to be movable. Has first and second actuating rod support 15, 18,

Both sides of the cylinder 11 have first and second inlet holes 21 and 23 for supplying or discharging a working fluid to the cylinder 11, and in the first and second inlet holes 21 and 23, respectively. In the cylinder having a differential function is connected to the first inlet pipe 22 and the second inlet pipe 24 is connected to the connector 25,

The first input pipe 22 such that the pressure of the fluid supplied to the cylinder 11 through the first input pipe 22 is greater than the pressure of the fluid supplied to the cylinder 11 through the second input pipe 24. The diameter (D 1 ) of the fluid through hole of the second through tube 24 is formed to be larger than the diameter (D 2 ) of the fluid through hole of the second inlet pipe (24),

The central connector 32 is provided with a central connector 32 having a central hole 31 in the center of the cylinder 11, and the central connector 32 protrudes into the cylinder 11 to form first and second operating rods 14 and 17. Has a stopper 33 for preventing the movement of

The diameter (D 3 ) of the central hole 31 is to be formed larger than the diameter (D 1 ) of the first injection pipe 22 for supplying fluid to the cylinder (11).

In order for the pressure of the fluid acting on the first inlet tube 22 to be greater than the pressure of the fluid acting on the second inlet tube 24, the diameter of the first inlet tube 22 and the second inlet tube 24 is increased. You can organize it with these different tubes,

The first input pipe 22 and the second input pipe 24 are discharge holes 25-1 of the connector 25 connecting the first input pipe 22 and the second input pipe 24 to the same diameter. And the diameter (D 1 ) (D 2 ) of the discharge hole 25-2 can be configured in different sizes,

Also, the diameter of the first input pipe 22 and the second input tube 24 is the same, but the first input hole of the cylinder 11 to which the first input tube 22 and the second input tube 24 are connected. The diameter D 1 of the 21 can be made larger than the diameter D 2 of the second penetration hole 22.

The connector 25 and the central connector 32 form a female screw on the inner side, or a male screw on the outer side to couple the connecting pipe.

Reference numeral 41 in the drawings is a piston packing.

Referring to the operation of the present invention having such a structure as follows.

The present invention has various embodiments in which different fluid pressures are applied to the fluid flowing into or out of the cylinder 11 through the first input pipe 22 and the second input pipe 24. By varying the diameter of the tube 22 and the second input tube 24 can be different fluid pressure is applied,

The first input pipe 22 and the discharge holes 25-1 and 25-2 having different diameters are formed in the connector 25 connecting the first input pipe 22 and the second input pipe 24. The fluid flowing into or out of the cylinder 11 through the second inlet pipe 24 may allow different fluid pressures to be applied.

The first input pipe 22 and the second input tube 24 are the same, but the first input hole 21 of the cylinder 11 to which the first input tube 22 and the second input tube 24 are connected. The diameter D 1 may be larger than the diameter D 2 of the second penetration hole 23 so that the fluid pressure flowing into the cylinder 11 may be differently applied.

As described above, in various embodiments, discharge holes 25-1 and 25-2 having different diameters are formed in the connector 25 connecting the first and second input pipes 22 and 24. When the fluid flowing into or out of the cylinder 11 through the first input pipe 22 and the second input pipe 24 is configured to allow different fluid pressures to be applied, the operation of the present invention will be described below.

The present invention has the first and second operating rods (14) and (17) protruding from the left and right sides of the cylinder (11), and the fluid is introduced or discharged into the cylinder (11) through the central injection hole (31), The first piston when the fluid is introduced into or discharged from the cylinder 11 through the first and second inlet pipes 22 and 24 connected to the first and second inlet holes 21 and 23. The first actuating rod 14 fixed to 13 and the second actuating rod 17 fixed to the second piston 16 are successively operated with a time difference.

That is, the fluid flowing into the connector 25 is simultaneously left and right through the first and second inlet holes 21 and 23 through the first inlet pipe 22 and the second inlet pipe 24. Flows into both sides,

The fluid flowing into the cylinder 11 through the first injection hole 21 pressurizes the first piston 13 first to move the first piston 13 to the center of the cylinder 11, and then to the second injection hole. The second piston 16 is pressurized by the fluid flowing into the cylinder 11 through 23 to perform a sequential differential operation of moving the second piston 16 to the center of the cylinder 11.

Thereafter, the fluid flowing into the central hole 31 pressurizes the first piston 13 to reversely operate the first piston 13 and the first operating rod 14, so that the first piston 13 operates first. Up to the rod support 15,

The fluid flowing into the central hole 31 presses the second piston 16 to move the second piston 16 until it reaches the second operating rod support 18. The first and second pistons 13 and 16 and the first and second operation rods 14 and 17 fixed thereto are reciprocated with each other over time.

Referring to the present invention in more detail through the drawings as described above are as follows.

As shown in Fig. 4A, the first and second pistons 13 and 16 moved to abut on the first and second actuating rod supports 15 and 18 at both ends of the cylinder 11 inner side. When the fluid flows into the connector 25, the fluid exits the first and second input pipes 22 and 24 through the left and right discharge holes 25-1 and 25-2 of the connector 25. , First exit the outlet hole 25-1 of the connector 25 having the large diameter D 1 , flow into the first inlet hole 21 of the cylinder 11, and the first piston 13. By pressing the first piston 13 and the first operating rod 14 to move to the stop 33 in the center of the cylinder 11 (see Fig. 4 (b)).

After the inner end of the first actuating rod 14 of the first piston 13 is stopped by the stopper 33, the hydraulic pressure acting on the connector 25 is reduced to the small diameter ( D 2 ) exits to the discharge hole 25-2 and flows into the cylinder 11 through the second discharge pipe 24 and the second injection hole 23 to move the second piston 16 to the center of the cylinder 11. (See Fig. 4 (c)).

In this way, fluids having different pressures are sequentially introduced into the left and right sides of the cylinder 11 through the first and second penetration holes 21 and 23 of the cylinder 11, so that the first and second pistons 13 and 16 are sequentially introduced. ) Is sequentially discharged through the central hole 31 of the center of the cylinder 11 after moving to the center of the cylinder (11).

The diameter D 3 of the center hole 31 of the cylinder 11 is larger than the diameter D 1 formed in the first injection pipe 22.

As described above, the first piston 13 and the second piston 16 which are sequentially moved to the center portion of the cylinder 11 are sequentially moved left and right by the fluid flowing from the center hole 31 of the cylinder 11. Done.

That is, when the fluid is introduced into the cylinder 11 through the central hole 31 of the central connector 32, the fluid is concentrated in the first piston 13 and the second piston 16 gathered at the center of the cylinder 11. While simultaneously pressurizing, the fluid behind the first piston 13 passes through the first injection pipe 22 connected to the large diameter D 1 discharge hole 25-1 of the connector 25. The first piston 13 is first operated by first exiting through the first piston, and the first piston 13 moves to the first operating rod support 15 and stops (see FIG. 4 (d)). 16) is pressurized by the fluid and moved to the second actuating rod support 18 to stop (see Fig. 4 (e)).

As described above, in moving the first and second pistons 13 and 16 by the hydraulic pressure flowing in the same pressure through the center hole 31 of the cylinder 11, the outlet hole 25- of the connector 25-. The first and second pistons 13 are caused by the first withdrawal of the fluid into the large diameter D 1 of 1 ) and the subsequent withdrawal of the fluid into the small diameter D 2 of the discharge hole 25-2. 16 is to move backwards sequentially over time.

As described above, in configuring the fluid pressure applied to the first input pipe 22 and the second input pipe 24 differently from each other, the first input pipe 22 and the second input pipe ( The diameter of 24 is different from each other, or the left and right discharge holes 25-1 and 25-2 of the connector 25 connecting the first and second input pipes 22 and 24 have different diameters. (D 1 ) (D 2 ) or the first and second injection holes 21 and 23 on the left and right sides of the cylinder (11) to have a different size to configure the present invention will perform the same action .

In the related art, in a mechanical mechanism using a cylinder that performs the next operation immediately after one operation is completed, each operation is performed using two cylinders.

However, in the present invention, one cylinder has first and second operating rods on both left and right sides thereof, and each of the first and second pistons for driving the cylinder is inside the cylinder and the first and second pistons are operated in sequence. It is possible to realize two operations with the cylinder of. Therefore, the conventional two-cylinder can be operated by using a single cylinder, the machine configuration is simple, and has the effect of obtaining a reliable operation.

The present invention is designed to act on both pneumatic cylinders and hydraulic cylinders using air pressure or fluid pressure.

The present invention is applied to a mechanical device or a hydraulically operated mechanical device that is immediately followed by another operation is performed after one operation is performed, it is to provide a cylinder device which is very useful as a driving device of agricultural machinery or industrial machinery.

According to the present invention, the first injection pipe connected to the connector 25 is used to move the first and second pistons in the cylinder 11 toward the center by acting hydraulic pressure on the connector 25 outside the cylinder 11. The discharge hole 25-1 connected to the 22 has a large diameter D 1 , and the discharge hole 25-2 connected to the second input pipe 24 connected to the connector has a small diameter D 2. ), The same hydraulic pressure acting on the directing holes 25 first acts through the discharge hole 25-1 having a large diameter D 1 , thereby moving the first piston 13 to the center of the cylinder 11. After the movement, the hydraulic pressure acts inside the cylinder 11 through the second inlet tube 24 connected to the discharge hole 25-2 of the small diameter D 2 to move the second piston 16 to the cylinder 11. ) To move sequentially to the center direction.

In addition, the first and second pistons 13 and 16 sequentially moved to the center of the cylinder 11 are formed by the hydraulic pressure flowing through the central hole 31 of the center connector 32 of the cylinder 11. 2 When pressing the pistons 13 and 16, respectively, the discharge hole of the connector 25 connected to the first injection hole 21 behind the first piston 13 and the first discharge pipe 24 coupled thereto ( The first piston 13 is first reversed, and the first piston 13 is stopped by the first actuating rod support 15 as the fluid first escapes to the large diameter D 1 of 25-1). When the second piston 16 is reversed to perform the operation.

In addition, the diameters of the first input pipe 22 and the second input pipe 24 are different from each other, or the sizes of the first and second input holes 21 and 23 on the left and right sides of the cylinder 11 are different from each other. The first and second pistons 13 and 16 inside the cylinder 11 are sequentially operated.

The present invention operating in this way will perform the correct operation regardless of the size and length of the cylinder (11),

The first and second operating rods 14 and 17 mounted in the cylinder 11 are operated by the first and second operating rods 14 and 17 according to their length to the engagement position of the central connector 32. The distance (stroke) can be arbitrarily adjusted.

In addition, the connector 25 or the central connector 32 directly attached to the cylinder 11 connecting the first second feed pipe is to form a female screw or a male screw on the inside or the outside to fix the pipe connected thereto.

1 is a perspective view of the present invention.

2 is an exploded perspective view of the present invention.

3 is a partial perspective cross-sectional view of the present invention.

Figure 4 is a cross-sectional view of the operating state of the present invention.

5 is a cross-sectional view of the present invention.

Fig. 6 is an enlarged partial sectional view of Fig. 5;

7 is a perspective view of another embodiment of the present invention.

8 is a cross-sectional view of another embodiment of the present invention.

9 is a partially enlarged cross-sectional view of FIG.

Figure 10 is a partial perspective cross-sectional view of yet another embodiment of the present invention.

11 is a cross-sectional view of FIG.

12 is a perspective view of another embodiment of the present invention.

13 is a cross-sectional view of FIG.

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

11 cylinder 13 first piston

14 First Operating Rod Support 15 First Operating Rod Support

16 Second piston 17 Second operating rod

21 1st injection hole 22 1st injection pipe

23 2nd injection hole 24 2nd injection pipe

25 End Connections 25-1, 25-2 Outlet Holes

31 Center hole 32 Center connector

33 stop

Claims (6)

It has a first operating rod 14 for fixing the first piston 13 and the second operating rod 17 for fixing the second piston 16 inside the cylinder 11, Both ends of the first and second operating rods 14 and 17 protrude out of the cylinder 11, and both ends of the cylinder 11 support the first and second operating rods 14 and 17 to be movable. Has first and second actuating rod support 15, 18, Both sides of the cylinder 11 have first and second inlet holes 21 and 23 for supplying or discharging a working fluid to the cylinder 11, and in the first and second inlet holes 21 and 23, respectively. In the cylinder having a differential function is connected to the first inlet pipe 22 and the second inlet pipe 24 is connected to the connector 25, The first input pipe 22 such that the pressure of the fluid supplied to the cylinder 11 through the first input pipe 22 is greater than the pressure of the fluid supplied to the cylinder 11 through the second input pipe 24. The diameter (D 1 ) of the fluid through hole of the second through tube 24 is formed to be larger than the diameter (D 2 ) of the fluid through hole of the second inlet pipe (24), The central connector 32 is provided with a central connector 32 having a central hole 31 in the center of the cylinder 11, and the central connector 32 protrudes into the cylinder 11 to form first and second operating rods 14 and 17. Has a stopper 33 for preventing the movement of The diameter (D 3 ) of the central hole 31 has a differential function, characterized in that formed larger than the diameter (D 1 ) of the fluid passage hole of the first injection pipe 22 for supplying fluid to the cylinder (11) Having a cylinder. The method according to claim 1, wherein the diameter D 1 of the fluid passage hole of the first inlet pipe 22 is larger than the diameter D 2 of the fluid passage hole of the second inlet pipe 24. The input tube 22 and the second input tube 24 have the same diameter, and the diameter D 1 of the discharge hole 25-1 of the connector 25 connected to the first input tube 22 is equal to each other. A cylinder having a differential function, characterized in that configured to be larger than the diameter (D 2 ) of the discharge hole (25-2) of the connector 25 connected to the two input pipe (24). The method according to claim 1, wherein the diameter D 1 of the fluid passage hole of the first inlet pipe 22 is larger than the diameter D 2 of the fluid passage hole of the second inlet pipe 24. The diameter of the input tube 22 and the second input tube 24 is the same, but the first input hole 21 of the cylinder 11 to which the first input tube 22 and the second input tube 24 are connected. A cylinder having a differential function, characterized in that the diameter (D 1 ) of the second injection hole 23 is larger than the diameter (D 2 ). The method according to claim 1, wherein the diameter D 1 of the fluid passage hole of the first inlet pipe 22 is larger than the diameter D 2 of the fluid passage hole of the second inlet pipe 24. A cylinder having a differential function, characterized in that the diameter of the input tube 22 is configured to be larger than the diameter of the second input tube (24). The cylinder having a differential function according to any one of claims 1 to 4, wherein the connector (25) and the central connector (32) have female threads formed therein. The cylinder according to any one of claims 1 to 4, wherein the connector (25) and the center connector (32) have male threads formed on the outside thereof.
KR2020090011272U 2009-08-28 2009-08-28 Differential motion type cylinder KR200447709Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112459960A (en) * 2021-02-02 2021-03-09 湖南机电职业技术学院 Novel hydraulic servo motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838004U (en) 1981-09-08 1983-03-12 焼結金属工業株式会社 Differential cylinder drive
JPH04266604A (en) * 1991-02-19 1992-09-22 Kobe Steel Ltd Drive control unit for hydraulic cylinder
JP2003343512A (en) * 2002-05-28 2003-12-03 Kayaba Ind Co Ltd Differential fluid pressure circuit
KR20090003432U (en) * 2007-10-09 2009-04-14 문정옥 Differential motion type cylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838004U (en) 1981-09-08 1983-03-12 焼結金属工業株式会社 Differential cylinder drive
JPH04266604A (en) * 1991-02-19 1992-09-22 Kobe Steel Ltd Drive control unit for hydraulic cylinder
JP2003343512A (en) * 2002-05-28 2003-12-03 Kayaba Ind Co Ltd Differential fluid pressure circuit
KR20090003432U (en) * 2007-10-09 2009-04-14 문정옥 Differential motion type cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112459960A (en) * 2021-02-02 2021-03-09 湖南机电职业技术学院 Novel hydraulic servo motor

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