KR20150061233A - Embedded haydrauric or pneumatic cylinder - Google Patents

Embedded haydrauric or pneumatic cylinder Download PDF

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Publication number
KR20150061233A
KR20150061233A KR1020130145081A KR20130145081A KR20150061233A KR 20150061233 A KR20150061233 A KR 20150061233A KR 1020130145081 A KR1020130145081 A KR 1020130145081A KR 20130145081 A KR20130145081 A KR 20130145081A KR 20150061233 A KR20150061233 A KR 20150061233A
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KR
South Korea
Prior art keywords
cylinder
bush
piston
circumferential surface
hydraulic
Prior art date
Application number
KR1020130145081A
Other languages
Korean (ko)
Inventor
박세연
Original Assignee
에이테크솔루션(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 에이테크솔루션(주) filed Critical 에이테크솔루션(주)
Priority to KR1020130145081A priority Critical patent/KR20150061233A/en
Publication of KR20150061233A publication Critical patent/KR20150061233A/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
    • 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
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1433—End caps
    • 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

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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 an embedded hydraulic or pneumatic cylinder embedded in a cylinder chamber of a structure without a cylinder body. According to the present invention, the hydraulic or pneumatic cylinder comprises a cylinder piston, a cylinder bush, and a cylinder cap. The cylinder piston comprises a cylindrical piston body and a cylindrical piston rod fixed on one end of the piston body while having a smaller outer diameter than the outer diameter of the piston body. The cylinder bush has a hollow cylinder shape and is fitted on the outer circumference of the piston rod. The cylinder cap has a flange shape to fix the cylinder bush on the structure. The piston body is inserted in a cylinder chamber of the structure, and a part of the piston rod protrudes to the upper part of the cylinder chamber. The cylinder bush is fitted between the inner circumference of the upper part of the cylinder chamber and the outer circumference of the piston rod to close therebetween. The cylinder cap is fixed on the structure by a plurality of fixing bolts to fix the cylinder bush on the right position of the upper part of the cylinder chamber. At least one piston sealing is installed on the outer circumference of the piston body to maintain oiltightness or airtightness between the outer circumference of the piston body and the inner circumference of the cylinder chamber. At least one inner sealing for a bush is installed on the inner circumference of the cylinder bush to maintain oiltightness or airtightness between the outer circumference of the piston rod and the inner circumference of the cylinder bush. According to the present invention, the embedded hydraulic or pneumatic cylinder can consume lower costs than an existing hydraulic or pneumatic cylinder and can arrange several hydraulic or pneumatic cylinders while having less spatial restriction even when the several hydraulic or pneumatic cylinders are installed in a limited structure.

Description

EMBEDDED HAYDRAURIC OR PNEUMATIC CYLINDER < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic or pneumatic cylinder, and more particularly, to a buried hydraulic or pneumatic cylinder in which a cylinder piston or the like is embedded in a structure itself without a cylinder body.

Generally, a hydraulic or pneumatic cylinder is a device in which a piston body and a piston rod are inserted in a cylinder body, and the piston body and the piston rod move by hydraulic pressure or pneumatic pressure. Such conventional hydraulic or pneumatic cylinders serve to drive other components that need to be moved in a space in a mold or other structure.

When a plurality of such conventional hydraulic or pneumatic cylinders are installed, a large space is required to accommodate them, and a large amount of cost is required to purchase and install these hydraulic or pneumatic cylinders. In particular, when several hydraulic or pneumatic cylinders are installed in one structure, such as a hydraulic cylinder for driving a rim core in an injection-molded metal mold, installation of these cylinders due to limitations on the spacing on the cylinder body or the limitation of the space in the structure In some cases, difficulties can arise, and the cost of purchasing and installing multiple cylinders can reach considerable levels.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic or pneumatic cylinder that is less expensive than a conventional hydraulic or pneumatic cylinder.

Another object of the present invention is to provide a hydraulic or pneumatic cylinder which is less subject to spatial constraints even when a plurality of hydraulic or pneumatic cylinders are installed in a structure of limited size.

According to another aspect of the present invention, there is provided a buried hydraulic or pneumatic cylinder in a cylinder chamber in a structure, the cylinder including a cylinder piston, A cylinder head comprising a piston body and a cylindrical piston rod fixed to one end of the piston body with an outer diameter smaller than the outer diameter of the piston body, the cylinder bush being fitted on an outer circumferential surface of the piston rod as a hollow cylinder, Wherein the piston bushing is mounted in a cylinder chamber in the structure and a portion of the piston rod protrudes above the cylinder chamber, the cylinder bushing is in contact with the upper inner circumferential surface of the cylinder chamber and the piston rod And the cylinder cap is interposed between the outer circumferential surfaces to seal the cylinder cap, The piston body is fixed to the structure by a plurality of fixing bolts so that the cylinder bush is fixed to the upper portion of the cylinder chamber. At least one piston seal is provided on the outer circumferential surface of the piston body so as to prevent oil tightness or leakage between the outer circumferential surface of the piston body and the inner circumferential surface of the cylinder chamber. And at least one bush inner sealing ring is provided on the inner circumferential surface of the cylinder bush to maintain oil tightness or air tightness between the outer circumferential surface of the piston rod and the inner circumferential surface of the cylinder bush.

The outer surface of the cylinder bush may have an outer bushing protruding outwardly in the radial direction of the cylinder bush, so that the cylinder cap presses the protruded outer bushing to fix the cylinder bush on the structure. Alternatively, the cylinder cap may press the upper surface of the cylinder bush to fix the cylinder bush on the structure, or the cylinder cap and the cylinder bush may be integrally formed and fixed on the structure.

A sealing ring may be further provided on an outer circumferential surface of the cylinder bush, and a gasket may be provided on a lower portion of the cylinder cap contacting the structure.

The embedding type hydraulic or pneumatic cylinder according to the present invention requires less cost than a conventional hydraulic or pneumatic cylinder and even when several hydraulic or pneumatic cylinders are installed in a limited structure, can do.

Other advantages and effects will be mentioned in the following detailed description and the like.

1 is a perspective view schematically showing a state in which a hydraulic or pneumatic cylinder (oil / pneumatic cylinder) according to an embodiment of the present invention is disposed in a structure such as an example of a fixed mounting plate of a mold.
For reference, 'oil / pneumatic cylinder' in the following refers to 'hydraulic or pneumatic cylinder'.
2 is an exploded perspective view of an oil / pneumatic cylinder according to an embodiment of the present invention.
3 is an assembled perspective view of an oil / pneumatic cylinder according to an embodiment of the present invention.
4 is a schematic cross-sectional view showing a state in which an oil / pneumatic cylinder according to an embodiment of the present invention is installed in a structure.
5 is a cross-sectional view of a manner in which the cylinder cap presses and fixes the upper surface of the cylinder bush as a modification of the cylinder cap and the cylinder bush.
6 is a cross-sectional view of a manner in which the cylinder cap and the cylinder bush are integrated as another modification of the cylinder cap and the cylinder bush.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

Referring first to Fig. 1, there is shown a hydraulic / pneumatic cylinder 100 according to an embodiment of the present invention, which is illustratively disposed in a structure 1 such as a fixed mounting plate of a mold, The cylinder 100 serves to raise the rim core for injection compression molding, for example. This oil / air cylinder 100 will be described in detail with reference to Figs. 2, 3 and 4. Fig.

2, 3 and 4, FIG. 2 is an exploded perspective view of a hydraulic / pneumatic cylinder 100 according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a hydraulic / pneumatic cylinder 100 according to an embodiment of the present invention, FIG. 3 is an assembled perspective view of the cylinder 100; FIG. 4 is a schematic cross-sectional view showing a state in which the oil / air cylinder 100 is installed in the structure 1 according to an embodiment of the present invention.

4, a structure 1 in which a buried oil / air cylinder 100 according to the present invention is installed includes a cylindrical cylinder chamber 2 capable of accommodating a cylinder piston 10 and a cylinder bush 20 And the lower and side portions of the cylinder chamber 2 are in an airtight state and the upper portion thereof is in an open state. In the structure 1, a plurality of such cylinder chambers 2 may be formed.

Referring to FIGS. 2, 3 and 4, an oil / pneumatic cylinder 100 according to an embodiment of the present invention includes a cylinder piston 10, a cylinder bush 20, and a cylinder cap 30, The cylinder piston 10 includes a cylindrical piston body 11 and a cylindrical piston rod 12. An outer peripheral surface of the piston body 11 in contact with the inner peripheral surface of the cylinder chamber 2 in the structure 1 is provided with at least one A piston seal ring (13) is installed. On the other hand, the hollow cylindrical cylinder bush 20 has an inner diameter slightly larger than the outer diameter of the piston rod 12 so that it can be fitted into the outer circumferential surface of the piston rod 12 and can be inserted into the cylinder chamber 2 in the structure 1 And a circular bush outer jaw 21 protruding radially outwardly may be formed on the outer circumferential surface of the cylinder bush 20.

At least one bush inner sealing ring 22 is provided on the inner circumferential surface of the cylinder bush 20 in contact with the outer circumferential surface of the piston rod 12. Also, at least one bush outer sealing ring 23 may be provided on the outer circumferential surface of the bush outer flange 21, which is in contact with the structure 1. On the other hand, the cylinder cap 30 is a flange-like plate having an inner diameter substantially equal to or slightly larger than the upper outer diameter of the cylinder bush 20 so as to be fitted to the upper outer peripheral surface of the cylinder bush 20, Holes 41 are formed.

4, the cylinder piston 10 as described above is inserted into the cylinder chamber 2 in the structure 1, and the cylinder bush 20 is partially protruded from the upper surface of the cylinder chamber 2 And is sandwiched between the outer circumferential surface of the piston rod 12 and the inner circumferential surface of the cylinder chamber 2. Then, the cylinder cap 30 is fitted on the upper outer circumferential surface of the cylinder bush 20 to be placed on the bush outer flange 21 of the cylinder bush 20 as shown in Fig. When the plurality of fixing bolts 40 are tightly fastened to the fixing bolt grooves 42 in the internal structure 1 through the plurality of fixing bolt holes 41 formed in the cylinder cap 30, The bush outer jaw 21 of the cylinder bush 20 is strongly pressed to firmly fix the entirety of the cylinder bush 20 on the structure 1. [

Thus, the embedding type oil pressure pneumatic cylinder 100 according to the present invention is firmly assembled and fastened in the structure 1, and the piston seal 13 provided on the outer peripheral surface of the piston body 11 contacts the outer peripheral surface of the piston body 11, The bush inner seal 22 provided on the inner circumferential surface of the cylinder bush 20 maintains the oil tightness or airtightness between the inner circumferential surface of the cylinder bush 20 and the outer circumferential surface of the piston rod 12 while maintaining the oil tightness or airtightness between the inner circumferential surface of the cylinder bush 20 . Fluid or gas passages 61 and 62 are formed in the upper and lower parts of the cylinder chamber 2 so that when a fluid or gas is supplied into the cylinder chamber 2 through these passages, As shown in FIG.

Optionally, a gasket 50 may additionally be provided on the lower surface of the cylinder cap 30 contacting the structure 1 to further enhance the oil tightness or airtight effect of the cylinder chamber 2, The bush outer sealing 23 may be added to the outer peripheral surface of the jaw 21 to further enhance the oil tightness or airtight effect of the cylinder chamber 2. [

5 and 6 illustrate deformations of the cylinder bush and the cylinder cap without the outer jaw 21 of the cylinder bush. As shown in FIG. 5, the cylinder cap 301 is formed on the upper surface of the cylinder bush 201 6, a flange-shaped cylinder bushing 202, in which a cylinder cap and a cylinder bushing are integrally formed, is fixed to the fixing bolts 40 Or may be fastened to the structure 1 by means of a bolt.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And it is also within the scope of the present invention.

1: Structure 2: Cylinder chamber
10: cylinder piston 11: piston body
12: Piston rod 13: Piston sealing
20: cylinder bushing 21: bushing outer jaw
22: Bush inner sealing 23: Bush outer sealing
30: Cylinder cap 40: Fixing bolt
41: Fixing bolt hole 42: Fixing bolt groove
50: gaskets 61, 62: fluid or gas passage
100: Oil / pneumatic cylinder 201, 202: Cylinder bush
301: Cylinder cap

Claims (6)

A buried hydraulic or pneumatic cylinder in a cylinder chamber in a structure, said hydraulic or pneumatic cylinder comprising:
A cylinder piston having a cylindrical piston body and a cylindrical piston rod fixed to one end of the piston body with an outer diameter smaller than the outer diameter of the piston body;
A hollow cylindrical cylinder bush fitted on an outer circumferential surface of the piston rod; And
And a flange-shaped cylinder cap for fixing the cylinder bush to the structure,
Wherein the piston body is inserted into a cylinder chamber in the structure and a part of the piston rod protrudes to an upper portion of the cylinder chamber and the cylinder bush is fitted between the upper inner circumferential surface of the cylinder chamber and the outer circumferential surface of the piston rod, The cylinder cap is fixedly secured to the structure by a plurality of fixing bolts so that the cylinder bush is fixed at a position above the cylinder chamber,
Wherein at least one piston seal is provided on an outer circumferential surface of the piston body to maintain oil tightness or airtightness between the outer circumferential surface of the piston body and the inner circumferential surface of the cylinder chamber and at least one bush inner sealing ring is provided on the inner circumferential surface of the cylinder bush, And the outer circumferential surface and the inner circumferential surface of the cylinder bushing are maintained to be oil tight or airtight.
The method according to claim 1,
Wherein the cylinder bush has an outer bushing protruding radially outwardly from the outer circumferential surface of the cylinder bushing so that the cylinder cap presses the protruding bushing outer surface to fix the cylinder bushing on the structure.
The method according to claim 1,
Wherein the cylinder cap presses the upper surface of the cylinder bush to secure the cylinder bush on the structure.
The method according to claim 1,
Wherein the cylinder cap and the cylinder bush are integrally formed and fixed on the structure.
The method according to claim 1,
Wherein a sealing ring is provided on an outer circumferential surface of the cylinder bush.
The method according to claim 1,
Wherein a gasket is installed at a lower portion of the cylinder cap in contact with the structure.
KR1020130145081A 2013-11-27 2013-11-27 Embedded haydrauric or pneumatic cylinder KR20150061233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130145081A KR20150061233A (en) 2013-11-27 2013-11-27 Embedded haydrauric or pneumatic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130145081A KR20150061233A (en) 2013-11-27 2013-11-27 Embedded haydrauric or pneumatic cylinder

Publications (1)

Publication Number Publication Date
KR20150061233A true KR20150061233A (en) 2015-06-04

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ID=53499261

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130145081A KR20150061233A (en) 2013-11-27 2013-11-27 Embedded haydrauric or pneumatic cylinder

Country Status (1)

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KR (1) KR20150061233A (en)

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