CN113606220A - Multi-stage oil cylinder with forward and backward oil filling ports fixed on outer cylinder - Google Patents
Multi-stage oil cylinder with forward and backward oil filling ports fixed on outer cylinder Download PDFInfo
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- CN113606220A CN113606220A CN202110632682.8A CN202110632682A CN113606220A CN 113606220 A CN113606220 A CN 113606220A CN 202110632682 A CN202110632682 A CN 202110632682A CN 113606220 A CN113606220 A CN 113606220A
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- 238000007789 sealing Methods 0.000 claims description 100
- 239000000428 dust Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 4
- 239000003921 oil Substances 0.000 abstract description 110
- 239000003981 vehicle Substances 0.000 abstract description 16
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 239000000346 nonvolatile oil Substances 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 description 3
- 206010024796 Logorrhoea Diseases 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 208000035475 disorder Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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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
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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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
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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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
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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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 invention discloses a multistage oil cylinder with forward and reverse oil charging ports fixed on an outer cylinder, wherein the multistage oil cylinder is provided with the forward oil charging port and the reverse oil charging port on the outer side of the outer cylinder; the first-stage guide sleeve is arranged at the bottom end of the outer cylinder; the primary piston is connected to the top end of the inner cylinder, and a primary annular cavity is formed among the outer cylinder, the inner cylinder, the primary piston and the primary guide sleeve in a surrounding manner; the secondary piston is connected to the top end of the piston rod; the secondary guide sleeve is arranged at the bottom end of the inner cylinder; a secondary annular cavity is formed among the inner cylinder, the piston rod, the secondary guide sleeve and the secondary piston in a surrounding manner; two long blind holes are processed in the cylinder wall of the inner cylinder, a first oil passing hole communicated with the primary annular cavity is processed in the cylinder wall at the top end of the inner cylinder, and a second oil passing hole communicated with the secondary annular cavity is processed in the cylinder wall at the bottom end of the long blind hole. The multi-stage oil cylinder has the characteristics of compact structure, fixed bidirectional oil filling ports and high reliability, does not occupy excessive vehicle body arrangement space, and has fixed oil filling pipelines.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a multi-stage oil cylinder with forward and reverse oil filling ports fixed on an outer cylinder.
Background
The hydraulic oil cylinder is used as a power device and is widely applied to various industries. On some special vehicles, the upper hinge of the multi-stage oil cylinder is connected with the vehicle body, the lower hinge of the multi-stage oil cylinder is connected with the crawler wheel or the rubber tire, when the multi-stage oil cylinder passes through a soft road surface, the multi-stage oil cylinder extends to fill oil, the crawler wheel or the rubber tire is put down to be in contact with the ground, the grounding area can be increased, and the trafficability of the vehicle is enhanced. When the vehicle runs to a hard road surface, the multistage oil cylinder reversely charges oil and contracts, the crawler wheel or the rubber tire is retracted, and the running resistance is reduced.
When the existing multi-stage oil cylinder is designed, a reverse oil filling port is arranged on an inner cylinder, and the inner cylinder can move along with the extension and contraction of the oil cylinder, so that the oil port can also move along with the inner cylinder; meanwhile, when the multistage oil cylinder extends, the multistage oil cylinder is frequently compressed or extended due to road impact in the running process, and therefore the reverse oil filling pipeline can swing along with the extension and contraction of the multistage oil cylinder.
Disclosure of Invention
In view of the above, the invention provides a multi-stage oil cylinder with forward and reverse oil charging ports fixed on an outer cylinder, which has the characteristics of compact structure, fixed bidirectional oil charging ports and high reliability, does not occupy excessive vehicle body arrangement space, and has fixed oil charging pipelines.
The invention adopts the following specific technical scheme:
a multi-stage oil cylinder with a forward oil filling port and a reverse oil filling port fixed on an outer cylinder comprises an upper hinge seat, the outer cylinder, an inner cylinder, a first-stage piston, a second-stage piston, a first-stage guide sleeve, a second-stage guide sleeve, a piston rod, a lower hinge seat and an outer hexagon bolt;
the upper hinge seat is fixedly connected with the top end of the outer cylinder; the lower hinge seat is connected with the extending end of the piston rod through threads;
the top end of the outer cylinder is provided with a forward oil filling port, and the bottom end of the outer cylinder is provided with a reverse oil filling port;
the primary guide sleeve is fixedly arranged at the bottom end of the outer cylinder through threads and is coaxial with the outer cylinder;
the primary piston is fixedly connected to the top end of the inner cylinder through an outer hexagon bolt and coaxially arranged inside the outer cylinder, and a primary annular cavity is formed among the outer cylinder, the inner cylinder, the primary piston and the primary guide sleeve in a surrounding manner;
the secondary piston is connected to the top end of the piston rod through threads and is coaxially arranged in the inner cylinder; the secondary guide sleeve is fixedly arranged at the bottom end of the inner cylinder through threads and is coaxially arranged inside the inner cylinder; a secondary annular cavity is formed among the inner cylinder, the piston rod, the secondary guide sleeve and the secondary piston in a surrounding mode;
two long blind holes extending along the axial direction of the cylinder wall of the inner cylinder are processed in the cylinder wall of the inner cylinder, a first oil passing hole communicated with the primary annular cavity is processed in the cylinder wall at the top end of the inner cylinder, and a second oil passing hole communicated with the secondary annular cavity is processed in the cylinder wall at the bottom end of the long blind hole;
and sealing devices are arranged between any two of the outer cylinder, the inner cylinder, the primary piston, the secondary piston, the primary guide sleeve, the secondary guide sleeve and the piston rod which are contacted with each other.
Furthermore, the two long blind holes are symmetrically arranged at intervals of 180 degrees along the circumferential direction of the inner cylinder;
the first oil passing hole and the second oil passing hole are arranged along the radial direction of the inner cylinder and are vertically intersected with the long blind hole.
Further, the central axis of the positive oil filling port is perpendicular to the central axis of the outer cylinder; the central axis of the reverse oil charging port is coplanar with the central axis of the forward oil charging port.
Furthermore, pipeline joints corresponding to the forward oil charging port and the reverse oil charging port are welded on the outer side wall of the outer cylinder.
Furthermore, the outer circumferential surface of the primary guide sleeve is provided with a first seal groove, the inner circumferential surface of the primary guide sleeve is provided with two first guide grooves, two second seal grooves and a first dust-proof groove, and the second seal groove is positioned between the first guide groove and the first dust-proof groove;
a first sealing ring is arranged in the first sealing groove; the first sealing ring forms a sealing device between the outer cylinder and the primary guide sleeve;
a first guide belt is arranged in each first guide groove; a first Stent seal is arranged in each second seal groove; a first dustproof ring is arranged in the first dustproof groove; the two first guide belts, the two first Steer seals and the first dustproof ring form a sealing device between the primary guide sleeve and the inner cylinder.
Furthermore, the outer circumferential surface of the primary piston is provided with two second guide grooves and two third seal grooves between the two second guide grooves, and the inner circumferential surface of the primary piston is provided with a fourth seal groove;
a second Stent seal is arranged in each third seal groove; a second guide belt is arranged in each second guide groove; the two second stents are oppositely oriented; the two second guide belts and the two second Stent seals form a sealing device between the outer cylinder and the primary piston;
a second sealing ring is arranged in the fourth sealing groove; the second seal ring constitutes a sealing means between the primary piston and the inner cylinder.
Furthermore, the outer circumferential surface of the secondary guide sleeve is provided with a fifth sealing groove, and the inner circumferential surface of the secondary guide sleeve is provided with two third guide grooves, two sixth sealing grooves and a second dust-proof groove;
a third sealing ring is arranged in the fifth sealing groove and forms a sealing device between the secondary guide sleeve and the inner cylinder;
a third guide belt is arranged in each third guide groove; a U-shaped ring is arranged in one sealing groove, and a third Stent seal is arranged in the other sealing groove; a second dust ring is arranged in the second dust-proof groove; the two third guide belts, the U-shaped ring, the third Stent seal and the second dustproof ring form a sealing device between the secondary guide sleeve and the piston rod.
Furthermore, a seventh sealing groove is formed in the inner circumferential surface of the secondary piston, and two fourth guide grooves and two eighth sealing grooves are formed in the outer circumferential surface of the secondary piston; the two eighth sealing grooves are positioned between the two fourth guide grooves;
a fourth sealing ring is arranged in the seventh sealing groove and forms a sealing device between the secondary piston and the piston rod;
a fourth guide belt is installed in one of the fourth guide grooves, and a fifth guide belt is installed in the other fourth guide groove; a fourth stet seal is installed in each eighth seal groove, and the directions of the two fourth stet seals are opposite; the fourth guide belt, the fifth guide belt and the two fourth Stent seals constitute a sealing device between the secondary piston and the inner cylinder.
Furthermore, the outer surface of the piston rod and the outer surface of the inner cylinder are processed by adopting a chromium plating and honing process.
Furthermore, a joint bearing, a sealing cover and a circlip for a hole are arranged in the upper hinge seat and the lower hinge seat.
Has the advantages that:
1. according to the multi-stage oil cylinder, the forward oil filling port and the reverse oil filling port for oil filling and discharging are arranged on the outer cylinder fixed relative to the vehicle body, and the structure of the bidirectional oil filling port is fixed, so that when the multi-stage oil cylinder is installed on the vehicle body, the length of a reverse oil filling pipeline is fixed, excessive vehicle body arrangement space does not need to be occupied, and the oil filling pipelines are fixed in length; the reverse oil filling port of the existing multi-stage oil cylinder is arranged on the inner cylinder, so that the length of a pipeline is required to be determined according to the extending state of the multi-stage oil cylinder, and therefore, the multi-stage oil cylinder can solve the problems of verbosity and disorder during the pipeline arrangement of the existing multi-stage oil cylinder, has the characteristics of compact structure and high reliability, does not occupy too much vehicle body arrangement space, and has fixed lengths of oil filling pipelines;
2. the multistage oil cylinder realizes the communication between the first-stage annular cavity and the second-stage annular cavity through the long blind hole which is arranged in the cylinder wall of the inner cylinder and extends along the axial direction of the inner cylinder, the first oil passing hole and the second oil passing hole which extend along the radial direction of the inner cylinder, the annular cavities at the inner side and the outer side of the inner cylinder are communicated through the cylinder wall of the inner cylinder, and parts specially used for communicating the first-stage annular cavity and the second-stage annular cavity are omitted, so that the multistage oil cylinder has the characteristics of compact structure and small number of parts.
Drawings
FIG. 1 is a schematic diagram of a half-section structure of a multi-stage cylinder in an extended state according to an embodiment of the present invention;
FIG. 2 is a schematic half-sectional view of the primary guiding sleeve of FIG. 1;
FIG. 3 is a schematic half-sectional view of the primary piston of FIG. 1;
FIG. 4 is a schematic view of a half-section structure of the secondary guide sleeve in FIG. 1;
FIG. 5 is a schematic half-sectional view of the two-stage piston of FIG. 1;
FIG. 6 is a schematic view of a half-section of the upper hinge mount of FIG. 1;
fig. 7 is a schematic half-sectional structure view of the multi-stage cylinder in a contracted state in the embodiment of the present invention.
Wherein, 1-an upper hinge seat, 2-a forward oil charging port, 3-an outer cylinder, 4-a primary piston, 5-an outer hexagon bolt, 6-an inner cylinder, 7-a reverse oil charging port, 8-a secondary piston, 9-a primary guide sleeve, 10-a piston rod, 11-a secondary guide sleeve, 12-a lower hinge seat, 13-a first oil passing hole, 14-a second oil passing hole, 15-a pipeline joint, 16-a primary annular cavity, 17-a long blind hole, 18-a secondary annular cavity, 19-a first sealing ring, 20-a first guide belt, 21-a first Stent seal, 22-a first dust ring, 23-a second Stent seal, 24-a second guide belt, 25-a second sealing ring, 26-a third sealing ring and 27-a third guide belt, 28-U-shaped ring, 29-third Stent seal, 30-second dust ring, 31-fourth sealing ring, 32-fourth guide belt, 33-fifth guide belt, 34-fifth guide belt, 35-elastic retainer ring for hole, 36-sealing cover, 37-joint bearing
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
Referring to fig. 1 and 7, an embodiment of the present invention provides a multi-stage oil cylinder with forward and backward oil filling ports fixed to an outer cylinder 3, where the multi-stage oil cylinder includes an upper hinge base 1, the outer cylinder 3, an inner cylinder 6, a first-stage piston 4, a second-stage piston 8, a first-stage guide sleeve 9, a second-stage guide sleeve 11, a piston rod 10, a lower hinge base 12, and an outer hexagon bolt 5;
the upper hinge seat 1 is fixedly connected with the top end of the outer cylinder 3; the lower hinge base 12 is connected with the extending end of the piston rod 10 through threads;
the top end of the outer cylinder 3 is provided with a forward oil charging port 2, and the bottom end is provided with a reverse oil charging port 7; the stroke of the primary piston 4 is positioned between the forward oil charging port 2 and the reverse oil charging port 7;
the primary guide sleeve 9 is fixedly arranged at the bottom end of the outer cylinder 3 through threads and is coaxial with the outer cylinder 3;
the primary piston 4 is fixedly connected to the top end of the inner cylinder 6 through an outer hexagon bolt 5 and coaxially arranged inside the outer cylinder 3, and a primary annular cavity 16 is formed among the outer cylinder 3, the inner cylinder 6, the primary piston 4 and the primary guide sleeve 9 in a surrounding manner;
the secondary piston 8 is connected to the top end of the piston rod 10 through threads and is coaxially arranged in the inner cylinder 6; the secondary guide sleeve 11 is fixedly arranged at the bottom end of the inner cylinder 6 through threads and is coaxially arranged inside the inner cylinder 6; a secondary annular cavity 18 is formed among the inner cylinder 6, the piston rod 10, the secondary guide sleeve 11 and the secondary piston 8;
two long blind holes 17 extending along the axial direction are processed in the cylinder wall of the inner cylinder 6, a first oil passing hole 13 communicated with the primary annular cavity 16 is processed in the cylinder wall at the top end of the inner cylinder 6, and a second oil passing hole 14 communicated with the secondary annular cavity 18 is processed in the cylinder wall at the bottom end of the long blind hole 17; the stroke of the secondary piston 8 is positioned between the first oil passing hole 13 and the second oil passing hole 14;
sealing devices are arranged between any two of the outer cylinder 3, the inner cylinder 6, the primary piston 4, the secondary piston 8, the primary guide sleeve 9, the secondary guide sleeve 11 and the piston rod 10 which are contacted with each other.
In the using process, the multistage oil cylinder is arranged on a vehicle body through the upper hinge seat 1, the lower hinge seat 12 is used for installing parts such as wheels, and the like, and the multistage oil cylinder is stretched through oil inlet and outlet of the forward oil charging port 2 and the reverse oil charging port 7, so that relative displacement of the parts such as the wheels and the like relative to the vehicle body is realized; the multi-stage oil cylinder is characterized in that a forward oil charging port 2 and a reverse oil charging port 7 for charging and discharging oil are arranged on an outer cylinder 3 fixed relative to a vehicle body, and the structure of the bidirectional oil charging port is fixed, so that when the multi-stage oil cylinder is installed on the vehicle body, the length of a reverse oil charging pipeline is fixed, excessive vehicle body arrangement space does not need to be occupied, and the oil charging pipelines are fixed in length; the length of a pipeline is required to be determined according to the extending state of the multi-stage oil cylinder because the reverse oil filling port 7 of the conventional multi-stage oil cylinder is arranged on the inner cylinder 6, so that the multi-stage oil cylinder can solve the problems of verbosity and disorder in pipeline arrangement of the conventional multi-stage oil cylinder, has the characteristics of compact structure and high reliability, does not occupy too much vehicle body arrangement space, and has fixed length of oil filling pipelines;
meanwhile, the multistage oil cylinder realizes the communication between the first-stage annular cavity 16 and the second-stage annular cavity 18 through the long blind hole 17 which is arranged in the cylinder wall of the inner cylinder 6 and extends along the axial direction of the inner cylinder 6, the first oil passing hole 13 and the second oil passing hole 14 which extend along the radial direction of the inner cylinder 6, the annular cavities at the inner side and the outer side of the inner cylinder 6 are communicated through the cylinder wall of the inner cylinder 6, and parts specially used for communicating the first-stage annular cavity 16 with the second-stage annular cavity 18 are omitted, so that the multistage oil cylinder has the characteristics of compact structure and small number of parts.
In a specific embodiment, as shown in the structure of fig. 1, two long blind holes 17 are symmetrically arranged at an interval of 180 ° along the circumferential direction of the inner cylinder 6, that is, two long blind holes 17 are uniformly distributed along the circumferential direction in the cylinder wall of the inner cylinder 6; the open end of the long blind hole 17 can be fixedly plugged by an outer hexagon bolt 5; the first oil passing hole 13 and the second oil passing hole 14 are arranged along the radial direction of the inner cylinder 6 and vertically intersect with the long blind hole 17. The central axis of the positive oil charging port 2 is vertical to the central axis of the outer cylinder 3; the central axis of the reverse oil charging port 7 is coplanar with the central axis of the forward oil charging port 2.
Specifically, a pipeline joint 15 corresponding to the forward oil charging port 2 and the reverse oil charging port 7 is welded on the outer side wall of the outer cylinder 3, and the pipeline joint 15 is convenient for being connected with a hydraulic pipeline and used for supplying hydraulic oil to the multi-stage oil cylinder or collecting the hydraulic oil discharged by the multi-stage oil cylinder.
On the basis of the various embodiments, as shown in the structure of fig. 2, the outer circumferential surface of the primary guide sleeve 9 is provided with a first sealing groove, the inner circumferential surface is provided with two first guide grooves, two second sealing grooves and a first dust-proof groove, and the second sealing groove is located between the first guide groove and the first dust-proof groove; a first sealing ring 19 is arranged in the first sealing groove; the first sealing ring 19 forms a sealing device between the outer cylinder 3 and the primary guide sleeve 9; a first guide belt 20 is arranged in each first guide groove; a first Stent seal 21 is arranged in each second seal groove; a first dust ring 22 is arranged in the first dust-proof groove; the two first guide belts 20, the two first steiners 21 and the first dust ring 22 form a sealing device between the primary guide sleeve 9 and the inner cylinder 6. Sealing between the primary guide sleeve 9 and the outer and inner cylinders 3, 6 can be achieved by sealing means.
As shown in the structure of fig. 3, the outer circumferential surface of the primary piston 4 is provided with two second guide grooves and two third seal grooves located between the two second guide grooves, and the inner circumferential surface is provided with a fourth seal groove; a second Stent seal 23 is arranged in each third seal groove; a second guide belt 24 is arranged in each second guide groove; the orientation of the two second stents 23 is opposite; the two second guide belts 24 and the two second steckel seals 23 form a sealing device between the outer cylinder 3 and the primary piston 4; a second sealing ring 25 is arranged in the fourth sealing groove; the second sealing ring 25 constitutes a sealing means between the primary piston 4 and the inner cylinder 6. The sealing between the primary piston 4 and the outer and inner cylinders 3, 6 can be achieved by the above-described sealing means.
As shown in the structure of fig. 4, the outer circumferential surface of the secondary guide sleeve 11 is provided with a fifth sealing groove, and the inner circumferential surface is provided with two third guide grooves, two sixth sealing grooves and one second dust-proof groove; a third sealing ring 26 is arranged in the fifth sealing groove, and the third sealing ring 26 forms a sealing device between the secondary guide sleeve 11 and the inner cylinder 6; a third guide belt 27 is arranged in each third guide groove; a U-shaped ring 28 is arranged in one sealing groove, and a third Stent seal 29 is arranged in the other sealing groove; a second dust ring 30 is arranged in the second dust-proof groove; the two third guide strips 27, the U-shaped ring 28, the third steiner 29 and the second dust ring 30 form a sealing arrangement between the secondary guide sleeve 11 and the piston rod 10. The sealing between the secondary guide sleeve 11 and the inner cylinder 6 and the piston rod 10 can be realized by the sealing device.
As shown in the structure of fig. 5, the inner circumferential surface of the secondary piston 8 is provided with a seventh sealing groove, and the outer circumferential surface is provided with two fourth guide grooves and two eighth sealing grooves; the two eighth sealing grooves are positioned between the two fourth guide grooves; a fourth sealing ring 31 is arranged in the seventh sealing groove, and the fourth sealing ring 31 forms a sealing device between the secondary piston 8 and the piston rod 10; a fourth guide belt 32 is arranged in one fourth guide groove, and a fifth guide belt 33 is arranged in the other fourth guide groove; a fourth Stent seal is arranged in each eighth seal groove, and the directions of the two fourth Stent seals are opposite; the fourth guide strip 32, the fifth guide strip 33 and the two fourth stet seals form a sealing arrangement between the secondary piston 8 and the inner cylinder 6. The sealing between the secondary piston 8 and the piston rod 10 and the inner cylinder 6 is achieved by the above-described sealing means.
In order to ensure the wear resistance and surface roughness of the piston rod 10 and the inner cylinder 6, the outer surface of the piston rod 10 and the outer surface of the inner cylinder 6 are both processed by adopting a chromium plating and honing process.
As shown in fig. 6, a joint bearing 37, a seal cover 36, and a circlip for hole 35 are provided in each of the upper hinge base 1 and the lower hinge base 12.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A multi-stage oil cylinder with a forward oil filling port and a reverse oil filling port fixed on an outer cylinder is characterized by comprising an upper hinge seat (1), the outer cylinder (3), an inner cylinder (6), a primary piston (4), a secondary piston (8), a primary guide sleeve (9), a secondary guide sleeve (11), a piston rod (10), a lower hinge seat (12) and an outer hexagon bolt (5);
the upper hinge seat (1) is fixedly connected with the top end of the outer cylinder (3); the lower hinge seat (12) is connected with the extending end of the piston rod (10) through threads;
a forward oil filling port (2) is formed in the top end of the outer cylinder (3), and a reverse oil filling port (7) is formed in the bottom end of the outer cylinder;
the primary guide sleeve (9) is fixedly arranged at the bottom end of the outer cylinder (3) through threads and is coaxial with the outer cylinder (3);
the primary piston (4) is fixedly connected to the top end of the inner cylinder (6) through an outer hexagon bolt (5) and coaxially arranged inside the outer cylinder (3), and a primary annular cavity (16) is formed among the outer cylinder (3), the inner cylinder (6), the primary piston (4) and the primary guide sleeve (9) in a surrounding mode;
the secondary piston (8) is connected to the top end of the piston rod (10) through threads and is coaxially arranged in the inner cylinder (6); the secondary guide sleeve (11) is fixedly arranged at the bottom end of the inner cylinder (6) through threads and is coaxially arranged inside the inner cylinder (6); a secondary annular cavity (18) is formed among the inner cylinder (6), the piston rod (10), the secondary guide sleeve (11) and the secondary piston (8) in a surrounding mode;
two long blind holes (17) extending along the axial direction of the inner cylinder are processed in the cylinder wall of the inner cylinder (6), a first oil passing hole (13) communicated with the primary annular cavity (16) is processed in the cylinder wall at the top end of the inner cylinder (6), and a second oil passing hole (14) communicated with the secondary annular cavity (18) is processed in the cylinder wall at the bottom end of the long blind hole (17);
sealing devices are arranged between the outer cylinder (3), the inner cylinder (6), the primary piston (4), the secondary piston (8), the primary guide sleeve (9), the secondary guide sleeve (11) and the piston rod (10) which are in random contact.
2. The multistage cylinder according to claim 1, characterized in that two said long blind holes (17) are symmetrically arranged with 180 ° intervals along the circumference of said inner cylinder (6);
the first oil passing hole (13) and the second oil passing hole (14) are arranged along the radial direction of the inner cylinder (6) and are vertically intersected with the long blind hole.
3. The multi-stage oil cylinder as claimed in claim 2, characterized in that the central axis of the forward oil charging port (2) is perpendicular to the central axis of the outer cylinder (3); the central axis of the reverse oil charging port (7) is coplanar with the central axis of the forward oil charging port (2).
4. The multi-stage oil cylinder as claimed in claim 3, characterized in that a pipeline joint (15) corresponding to the forward oil charging port (2) and the reverse oil charging port (7) is welded to the outer side wall of the outer cylinder (3).
5. The multi-stage oil cylinder as claimed in any one of claims 1 to 4, characterized in that the first sealing groove is arranged on the outer circumferential surface of the primary guide sleeve (9), and the two first guide grooves, the two second sealing grooves and the first dust-proof groove are arranged on the inner circumferential surface of the primary guide sleeve, and the second sealing groove is located between the first guide groove and the first dust-proof groove;
a first sealing ring (19) is arranged in the first sealing groove; the first sealing ring (19) forms a sealing device between the outer cylinder and the primary guide sleeve (9);
a first guide belt (20) is arranged in each first guide groove; a first Stent seal (21) is mounted in each second seal groove; a first dust ring (22) is arranged in the first dust-proof groove; the two first guide belts (20), the two first Stent seals (21) and the first dust ring (22) form a sealing device between the primary guide sleeve (9) and the inner cylinder (6).
6. The multistage cylinder according to any one of claims 1 to 4, characterized in that the outer peripheral surface of the primary piston (4) is provided with two second guide grooves and two third seal grooves between the two second guide grooves, and the inner peripheral surface is provided with a fourth seal groove;
a second Stent seal (23) is arranged in each third seal groove; a second guide belt (24) is arranged in each second guide groove; the two second stents (23) are oppositely oriented; the two second guide belts (24) and the two second Stent seals (23) form a sealing device between the outer cylinder (3) and the primary piston (4);
a second sealing ring (25) is arranged in the fourth sealing groove; the second sealing ring (25) forms a sealing device between the primary piston (4) and the inner cylinder (6).
7. The multi-stage oil cylinder as claimed in any one of claims 1 to 4, characterized in that the outer circumferential surface of the secondary guide sleeve (11) is provided with a fifth sealing groove, and the inner circumferential surface is provided with two third guide grooves, two sixth sealing grooves and a second dust-proof groove;
a third sealing ring (26) is arranged in the fifth sealing groove, and the third sealing ring (26) forms a sealing device between the secondary guide sleeve (11) and the inner cylinder (6);
a third guide belt (27) is arranged in each third guide groove; a U-shaped ring (28) is arranged in one sealing groove, and a third Stent seal (29) is arranged in the other sealing groove; a second dust ring (30) is arranged in the second dust-proof groove; the two third guide belts (27), the U-shaped ring (28), the third Stent seal (29) and the second dust ring (30) form a sealing device between the secondary guide sleeve (11) and the piston rod (10).
8. The multistage cylinder according to any one of claims 1 to 4, characterized in that the inner peripheral surface of the secondary piston (8) is provided with a seventh seal groove, and the outer peripheral surface is provided with two fourth guide grooves and two eighth seal grooves; the two eighth sealing grooves are positioned between the two fourth guide grooves;
a fourth sealing ring (31) is arranged in the seventh sealing groove, and the fourth sealing ring (31) forms a sealing device between the secondary piston (8) and the piston rod (10);
a fourth guide belt (32) is installed in one of the fourth guide grooves, and a fifth guide belt (34) is installed in the other fourth guide groove; a fourth Stent seal (33) is arranged in each eighth seal groove, and the directions of the two fourth Stent seals (33) are opposite; the fourth guide belt (32), the fifth guide belt (34) and the two fourth Stent seals (33) form a sealing arrangement between the secondary piston (8) and the inner cylinder (6).
9. The multi-stage cylinder according to any one of claims 1 to 4, wherein the outer surface of the piston rod (10) and the outer surface of the inner cylinder (6) are both processed by a chrome plating, honing process.
10. The multi-stage cylinder according to any of claims 1 to 4, characterized in that a knuckle bearing (37), a sealing cover (36) and a circlip for hole (35) are provided in both the upper hinge mount (1) and the lower hinge mount (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632682.8A CN113606220A (en) | 2021-06-07 | 2021-06-07 | Multi-stage oil cylinder with forward and backward oil filling ports fixed on outer cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110632682.8A CN113606220A (en) | 2021-06-07 | 2021-06-07 | Multi-stage oil cylinder with forward and backward oil filling ports fixed on outer cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113606220A true CN113606220A (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110632682.8A Pending CN113606220A (en) | 2021-06-07 | 2021-06-07 | Multi-stage oil cylinder with forward and backward oil filling ports fixed on outer cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN113606220A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002005115A (en) * | 2000-06-26 | 2002-01-09 | Komatsu Ltd | Structure of double cylinder type hydraulic cylinder |
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN106593992A (en) * | 2016-12-23 | 2017-04-26 | 襄阳中铁宏吉工程技术有限公司 | Antenna elevating multi-stage oil cylinder |
| CN208764019U (en) * | 2018-07-28 | 2019-04-19 | 韶关液压件厂有限公司 | A kind of interlayer makees the two-action multi-stage cylinder of oil supply gallery |
| CN112431811A (en) * | 2020-12-04 | 2021-03-02 | 徐州徐工液压件有限公司 | Double-cylinder combined type multi-stage bolt hydraulic cylinder |
| CN212928374U (en) * | 2020-08-13 | 2021-04-09 | 龙工(上海)液压有限公司 | Novel multipurpose two-stage oil cylinder |
-
2021
- 2021-06-07 CN CN202110632682.8A patent/CN113606220A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002005115A (en) * | 2000-06-26 | 2002-01-09 | Komatsu Ltd | Structure of double cylinder type hydraulic cylinder |
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN106593992A (en) * | 2016-12-23 | 2017-04-26 | 襄阳中铁宏吉工程技术有限公司 | Antenna elevating multi-stage oil cylinder |
| CN208764019U (en) * | 2018-07-28 | 2019-04-19 | 韶关液压件厂有限公司 | A kind of interlayer makees the two-action multi-stage cylinder of oil supply gallery |
| CN212928374U (en) * | 2020-08-13 | 2021-04-09 | 龙工(上海)液压有限公司 | Novel multipurpose two-stage oil cylinder |
| CN112431811A (en) * | 2020-12-04 | 2021-03-02 | 徐州徐工液压件有限公司 | Double-cylinder combined type multi-stage bolt hydraulic cylinder |
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Application publication date: 20211105 |