CN108266423B - Double-rod high-pressure oil cylinder - Google Patents
Double-rod high-pressure oil cylinder Download PDFInfo
- Publication number
- CN108266423B CN108266423B CN201710001363.0A CN201710001363A CN108266423B CN 108266423 B CN108266423 B CN 108266423B CN 201710001363 A CN201710001363 A CN 201710001363A CN 108266423 B CN108266423 B CN 108266423B
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- Prior art keywords
- piston
- piston rod
- main body
- hole
- cylinder body
- Prior art date
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Links
- 238000012856 packing Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 21
- 230000033001 locomotion Effects 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
-
- 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
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap sealings
-
- 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
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- 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
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to a double-rod high-pressure oil cylinder, which comprises a cylinder body, end covers, a piston and a piston rod, wherein the cylinder body is of a cylindrical structure, and the end covers are fixedly and hermetically arranged at the two axial ends of the cylinder body; a piston is coaxially arranged in the cylinder body in a driving way, a piston rod is fixedly penetrated in the piston, and the two axial ends of the piston rod extend out of end covers at the two axial ends of the cylinder body respectively; the two end covers are respectively provided with an oil filling hole communicated with the inside of the cylinder body, and the concrete structure of the end cover comprises an end cover main body, a piston rod mounting hole and a through hole; the piston comprises a piston main body, a piston rod mounting through hole and a limiting ring groove. The invention has reasonable structural design, simple and reliable structure, low cost, low failure rate, convenient maintenance, improved activity flexibility, reduced abrasion and long service life, and is convenient for maintenance on the premise of ensuring the tightness, thereby improving the working reliability and the whole service life of the element.
Description
Technical Field
The invention is applied to the field of high-pressure oil cylinders, in particular to a double-rod high-pressure oil cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion. The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The double-rod hydraulic oil cylinder can do work bidirectionally, work pieces are saved, and efficiency is improved, but a piston in the cylinder body needs to bear bidirectional pressure action, so that the piston is easy to wear and leak oil in a long-time high-pressure working state, and is difficult to maintain and recover, and output pressure and working stability are affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the double-rod high-pressure oil cylinder which adopts a metal structure as a bracket main body, thereby prolonging the service life and reducing the abrasion.
The invention solves the technical problems by adopting the following technical scheme:
the double-rod high-pressure oil cylinder comprises a cylinder body, end covers, a piston and a piston rod, wherein the cylinder body is of a cylindrical structure, and the end covers are fixedly and hermetically arranged at the two axial ends of the cylinder body; a piston is coaxially arranged in the cylinder body in a driving way, a piston rod is fixedly penetrated in the piston, and the two axial ends of the piston rod extend out of end covers at the two axial ends of the cylinder body respectively; the two end covers are respectively provided with an oil filling hole communicated with the inside of the cylinder body, and the oil filling hole is characterized in that: the concrete structure of the end cover comprises an end cover main body, a piston rod mounting hole and a through hole, wherein the end cover is fixedly arranged at one axial end of the cylinder body, and the middle part of the end cover main body is coaxially provided with the piston rod mounting hole; a sealing convex ring is arranged in the middle part in the piston rod mounting hole, an oil filling hole is arranged on one radial side of the end cover between the sealing convex ring and the inner end surface of the cylinder body of the end cover, and the oil filling hole is communicated with the piston rod mounting hole; a packing ring groove is formed between the sealing convex ring and the outer end face of the end cover, a 45-degree inclined plane is formed between the packing ring groove and the sealing convex ring, and a circular end plate mounting groove is formed in a piston rod mounting hole between the packing ring groove and the end face of the end cover;
the piston comprises a piston main body, a piston rod mounting through hole and a limiting ring groove, wherein the piston main body is of a metal cylinder structure, the piston main body is internally and coaxially provided with the piston rod mounting through hole, and the limiting ring groove is formed in the piston mounting through hole; two limit ring grooves are coaxially and alternately arranged in a piston rod installation through hole in the piston main body; a stepped ring with the diameter larger than that of the piston rod installation through hole is arranged at one end of the piston rod installation through hole in the piston body, the inner angle of the stepped ring is an acute angle, and a 45-degree inclined plane is arranged between the stepped ring and the axial end face of the piston body.
The end cover main body is a square cover plate, and a plurality of through holes are formed in the end cover at the periphery of the piston rod mounting hole.
And the end face of the end cover main body embedded into the valve body is provided with a cylindrical cylinder inner sleeve, a coaxial embedded annular groove is arranged at the connecting position of the sleeve and the end cover main body at the root, and an embedded convex ring is arranged at the axial end face of the cylinder body corresponding to the embedded annular groove.
And an annular sealing groove is formed in the middle of the annular outer wall of the inner sleeve of the cylinder, and an O-shaped ring is arranged in the annular sealing groove.
Two packing concave rings are symmetrically arranged in the middle of the radial supporting end surface of the piston main body at intervals, and graphite packing is filled in the two packing concave rings; an annular shallow groove is formed in the outer wall of the piston main body between the two concave rings, and a support end face in circular angle transition is formed between the two axial ends of the annular shallow groove and the filler groove.
Moreover, the contact angles of the support end surfaces at the two axial ends of the piston main body and the cylinder body are all provided with round angle transition, and a 45-degree transition inclined plane is arranged between the support end surfaces and the packing concave ring.
The invention has the advantages and positive effects that:
the invention has reasonable structural design, simple and reliable structure, low cost, low failure rate, convenient maintenance, improved activity flexibility, reduced abrasion and long service life, and is convenient for maintenance on the premise of ensuring the tightness, thereby improving the working reliability and the whole service life of the element.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic illustration of a semi-sectional structure of an end cap;
FIG. 3 is a left side view of the end cap;
fig. 4 is a schematic view of a semi-sectional structure of the piston.
Detailed Description
The invention will now be described in further detail by way of specific examples, which are given by way of illustration only and not by way of limitation, with reference to the accompanying drawings.
The double-rod high-pressure oil cylinder is shown in the figure 1, and comprises a cylinder body 3, end covers 1, a piston 4 and a piston rod 2, wherein the cylinder body is of a cylindrical structure, and the end covers are fixedly and hermetically arranged at the two axial ends of the cylinder body; a piston 4 is coaxially arranged in the cylinder body in a driving way, a piston rod is fixedly penetrated in the piston, and the two axial ends of the piston rod extend out of end covers at the two axial ends of the cylinder body respectively; the two end covers are respectively provided with an oil filling hole communicated with the inside of the cylinder body, and the piston is driven to move in the cylinder body through filling/discharging pressure oil, so that the two ends of the piston rod are driven to synchronously move in a straight line.
Referring to fig. 2 to 3, the specific structure of the end cover includes an end cover main body 11, a piston rod mounting hole (not numbered) and a through hole 19, the end cover is used for being fixedly mounted at one axial end of the cylinder body, and the middle part of the end cover main body is coaxially provided with a piston rod mounting hole; a plurality of through holes 19 are formed in the end cap on the outer circumference of the piston rod mounting hole for fixing the end cap to the cylinder end.
The piston rod extends out of the end cover from the piston rod mounting hole of the end cover main body, and the piston rod performs linear reciprocating motion under the drive of hydraulic oil.
A sealing convex ring 16 is arranged in the middle part in the piston rod mounting hole, an oil filling hole 12 is arranged on one radial side of the end cover between the sealing convex ring and the inner end surface of the cylinder body of the end cover, the oil filling hole is communicated with the piston rod mounting hole, and pressure oil is filled into the cylinder body; an internal thread is arranged on the outer side of the oil filling hole and used for installing an oil filling pipe joint in a meshed manner;
in order to reduce the hard friction between the end cover and the piston rod, a packing ring groove 17 is formed between the sealing convex ring and the outer end surface of the end cover, a 45-degree inclined plane is formed between the packing ring groove and the sealing convex ring, and the contact area between the end cover and the hard surface of the piston rod is further reduced; a circular end plate mounting groove 18 is formed in the piston rod mounting hole between the packing ring groove and the end face of the end cover, and the diameter of the end plate mounting groove is larger than that of the packing ring groove for coaxially fixing the end plate 7; a45-degree transition ring is arranged between the packing annular groove and the end plate mounting groove.
In order to be convenient for install, this end cover main part is square apron, is convenient for make the oil filler point of end plate main part and the accurate alignment of valve body oil filler point mounted position.
In order to promote the tight connection of end cover main part and valve body, the terminal surface that the end cover main part embedded the valve body is made to have cylindrical jar interior sleeve pipe 13, is equipped with a coaxial embedded annular 15 in the end cover main part hookup location of sleeve pipe and root, and the cylinder body axial terminal surface that embedded annular corresponds is equipped with embedded bulge loop.
In order to ensure the tightness between the end cover main body and the cylinder body, an annular sealing groove 4 is formed in the middle of the annular outer wall of the inner sleeve of the cylinder, and an O-shaped ring 6 is arranged in the annular sealing groove.
Referring to fig. 4, the specific structure of the piston 4 includes a piston body 41, a piston rod mounting through hole 42 and a limiting ring groove 43, the piston body is a metal cylinder structure, a piston rod mounting through hole is coaxially formed in the piston body, and a limiting ring groove is formed in the piston mounting through hole for fixedly mounting the piston rod. When the piston is assembled, the piston main body is coaxially arranged in the cylinder body of the oil cylinder and performs linear reciprocating motion in the cylinder body, the middle part of the piston rod is coaxially sleeved in the piston main body, the two ends of the piston rod respectively linearly extend out of the cylinder body, and the movement of the piston main body drives the piston rod to perform linear reciprocating motion;
in order to ensure the connection stability between the piston main body and the piston rod, two limit ring grooves are coaxially arranged in a piston rod installation through hole in the piston main body at intervals, so that the installation stability of the piston rod and the piston main body is enhanced;
a stepped ring 44 with the diameter larger than that of the piston rod installation through hole is arranged at one end of the piston rod installation through hole in the piston body, the inner angle of the stepped ring is an acute angle, a 45-degree inclined plane is arranged between the stepped ring and the axial end face of the piston body, the piston rod installation is convenient during assembly, a limiting snap ring is installed after the assembly is completed, and the piston rod is further accurately fixed.
In order to enhance the sliding performance between the piston main body and the cylinder body, reduce the abrasion and prolong the service life, two packing concave rings 46 are symmetrically arranged at intervals in the middle of the radial supporting end surface 5 of the piston main body, and graphite packing 5 with better sliding performance and guaranteed tightness is packed in the two packing concave rings; an annular shallow groove 48 is formed in the outer wall of the piston main body between the two concave rings, a supporting end face 47 with a rounded transition is formed between the two axial ends of the annular shallow groove and the filler groove, and hard surface friction with the inner wall of the cylinder body is reduced.
The contact angles of the support end surfaces 45 at the two axial ends of the piston main body and the cylinder body are respectively provided with a round angle transition, a 45-degree transition inclined plane is arranged between the support end surfaces and the concave ring of the filler, and the sliding deformation of the filler is buffered.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (4)
1. The double-rod high-pressure oil cylinder comprises a cylinder body, end covers, a piston and a piston rod, wherein the cylinder body is of a cylindrical structure, and the end covers are fixedly and hermetically arranged at the two axial ends of the cylinder body; a piston is coaxially arranged in the cylinder body in a driving way, a piston rod is fixedly penetrated in the piston, and the two axial ends of the piston rod extend out of end covers at the two axial ends of the cylinder body respectively; the two end covers are respectively provided with an oil filling hole communicated with the inside of the cylinder body, and the oil filling hole is characterized in that: the concrete structure of the end cover comprises an end cover main body, a piston rod mounting hole and a through hole, wherein the end cover is fixedly arranged at one axial end of the cylinder body, and the middle part of the end cover main body is coaxially provided with the piston rod mounting hole; a sealing convex ring is arranged in the middle part in the piston rod mounting hole, an oil filling hole is arranged on one radial side of the end cover between the sealing convex ring and the inner end surface of the cylinder body of the end cover, and the oil filling hole is communicated with the piston rod mounting hole; a packing ring groove is formed between the sealing convex ring and the outer end face of the end cover, a 45-degree inclined plane is formed between the packing ring groove and the sealing convex ring, and a circular end plate mounting groove is formed in a piston rod mounting hole between the packing ring groove and the end face of the end cover;
the piston comprises a piston main body, a piston rod mounting through hole and a limiting ring groove, wherein the piston main body is of a metal cylinder structure, the piston main body is internally and coaxially provided with the piston rod mounting through hole, and the limiting ring groove is formed in the piston mounting through hole; two limit ring grooves are coaxially and alternately arranged in a piston rod installation through hole in the piston main body; a stepped ring with the diameter larger than that of the piston rod mounting through hole is arranged at one end of the piston rod mounting through hole in the piston main body, the inner angle of the stepped ring is an acute angle, and a 45-degree inclined plane is arranged between the stepped ring and the axial end surface of the piston main body;
two packing concave rings are symmetrically arranged in the middle of the radial supporting end surface of the piston main body at intervals, and graphite packing is filled in the two packing concave rings; an annular shallow groove is formed in the outer wall of the piston main body between the two concave rings, a support end face in circular angle transition is formed between the two axial ends of the annular shallow groove and the filler groove, circular angle transition is formed between the support end faces of the two axial ends of the piston main body and the contact angle of the cylinder body, and a 45-degree transition inclined plane is formed between the support end faces and the filler concave rings.
2. The dual-output-rod high-pressure cylinder according to claim 1, wherein: the end cover main body is a square cover plate, and a plurality of through holes are formed in the end cover at the periphery of the piston rod mounting hole.
3. The dual-output-rod high-pressure cylinder according to claim 1, wherein: the end face of the end cover main body embedded into the valve body is provided with a cylindrical cylinder inner sleeve, a coaxial embedded annular groove is formed at the connecting position of the sleeve and the end cover main body at the root, and an embedded convex ring is formed at the axial end face of the cylinder body corresponding to the embedded annular groove.
4. The dual-output-rod high-pressure cylinder according to claim 1, wherein: an annular sealing groove is formed in the middle of the annular outer wall of the inner sleeve of the cylinder, and an O-shaped ring is arranged in the annular sealing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001363.0A CN108266423B (en) | 2017-01-03 | 2017-01-03 | Double-rod high-pressure oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710001363.0A CN108266423B (en) | 2017-01-03 | 2017-01-03 | Double-rod high-pressure oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266423A CN108266423A (en) | 2018-07-10 |
| CN108266423B true CN108266423B (en) | 2024-01-30 |
Family
ID=62770508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710001363.0A Active CN108266423B (en) | 2017-01-03 | 2017-01-03 | Double-rod high-pressure oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108266423B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1547888A (en) * | 1975-09-04 | 1979-06-27 | Oiles Industry Co Ltd | Plastics air cylinder assembly |
| CN201953737U (en) * | 2010-12-24 | 2011-08-31 | 湖州高登机器研发有限公司 | Hollow double-outlet-rod hydraulic cylinder |
| CN102678667A (en) * | 2012-06-04 | 2012-09-19 | 格力乐液压系统(常州)有限公司 | Wear-resisting hydrocylinder |
| CN206495840U (en) * | 2017-01-03 | 2017-09-15 | 天津市浩琳机械加工有限公司 | A kind of pair of rod high-voltage oil cylinder |
-
2017
- 2017-01-03 CN CN201710001363.0A patent/CN108266423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1547888A (en) * | 1975-09-04 | 1979-06-27 | Oiles Industry Co Ltd | Plastics air cylinder assembly |
| CN201953737U (en) * | 2010-12-24 | 2011-08-31 | 湖州高登机器研发有限公司 | Hollow double-outlet-rod hydraulic cylinder |
| CN102678667A (en) * | 2012-06-04 | 2012-09-19 | 格力乐液压系统(常州)有限公司 | Wear-resisting hydrocylinder |
| CN206495840U (en) * | 2017-01-03 | 2017-09-15 | 天津市浩琳机械加工有限公司 | A kind of pair of rod high-voltage oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108266423A (en) | 2018-07-10 |
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