CN111894935A - Hydraulic cylinder with external leakage service-proof function - Google Patents

Hydraulic cylinder with external leakage service-proof function Download PDF

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Publication number
CN111894935A
CN111894935A CN202010617846.5A CN202010617846A CN111894935A CN 111894935 A CN111894935 A CN 111894935A CN 202010617846 A CN202010617846 A CN 202010617846A CN 111894935 A CN111894935 A CN 111894935A
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CN
China
Prior art keywords
end cover
left end
oil
piston rod
hole
Prior art date
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Withdrawn
Application number
CN202010617846.5A
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Chinese (zh)
Inventor
钱雪松
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Changzhou Campus of Hohai University
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Changzhou Campus of Hohai University
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Application filed by Changzhou Campus of Hohai University filed Critical Changzhou Campus of Hohai University
Priority to CN202010617846.5A priority Critical patent/CN111894935A/en
Publication of CN111894935A publication Critical patent/CN111894935A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • F15B15/1428—Cylinders
    • 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
    • F15B15/1457—Piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods

Abstract

The invention discloses a hydraulic oil cylinder with an external leakage service-proof function, which comprises a right end cover, a cylinder barrel, a piston rod, a left end cover dust ring, a left end cover first sealing piece, a left end cover second sealing piece and a left end cover guide belt. According to the hydraulic oil cylinder, through an innovative structural design, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic oil cylinder, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out through the oil leakage port and the oil pipe to directly enter the oil tank, so that the problem of external leakage of the hydraulic oil cylinder is effectively solved, and the reliable work of a hydraulic system is ensured. The anti-leakage structure of the hydraulic oil cylinder can be applied to a hydraulic damper and a hydraulic buffer besides the hydraulic oil cylinder, and has wide application prospect.

Description

Hydraulic cylinder with external leakage service-proof function
Technical Field
The invention relates to an external leakage prevention structure of a hydraulic oil cylinder, in particular to a hydraulic oil cylinder with an external leakage prevention function, and belongs to the fields of machinery, hydraulic pressure, damping buffering and the like.
Background
At present, a hydraulic transmission system is widely applied to various mechanical equipment, and a hydraulic oil cylinder serving as an actuating element of the hydraulic system is widely applied. The leakage form of the hydraulic oil cylinder comprises an inner leakage form and an outer leakage form, the inner leakage of the hydraulic oil cylinder which meets the standard is allowed to be much, the outer leakage of the hydraulic oil cylinder is strictly controlled, particularly in some special occasions, the outer leakage of the hydraulic oil cylinder is strictly forbidden, and the outer leakage of the hydraulic oil cylinder is commonly existed in dynamic sealing occasions, such as between a piston rod and an end cover of the hydraulic oil cylinder.
Disclosure of Invention
In order to effectively solve the problem of external leakage of the hydraulic oil cylinder, the invention provides the hydraulic oil cylinder with the external leakage service-proof function.
The technical scheme of the invention is as follows:
a hydraulic oil cylinder with an external leakage service-proof function comprises a right end cover, a cylinder barrel, a piston rod, a left end cover dust ring, a left end cover first sealing element, a left end cover second sealing element and a left end cover guide belt;
a right end cover oil through hole is axially processed at the left part of the right end cover; a right end cover working oil port is radially processed in the middle of the lower side of the right end cover; the right end cover working oil port and the right end cover oil through hole are communicated with each other; a left end cover dustproof ring groove, a left end cover first sealing ring groove, a left end cover leakage oil groove, a left end cover second sealing ring groove and a left end cover guide belt groove are sequentially processed on the circumferential inner wall of the piston rod hole from left to right; a first oil through hole of the left end cover is axially processed at the right part of the left end cover; a left end cover working oil port is radially processed in the middle of the lower side of the left end cover; the working oil port of the left end cover is communicated with the first oil through hole of the left end cover; a left end cover oil leakage port and a left end cover second oil through hole are radially processed in the middle of the upper side of the left end cover; the left end cover oil leakage port is communicated with the left end cover oil leakage groove through the left end cover second oil through hole; the right end cover is reliably connected with the right end of the cylinder barrel, and meanwhile, reliable sealing is formed between the right end cover and the inner wall of the right end of the cylinder barrel; the piston and the piston rod are reliably connected, and meanwhile, the piston and the piston rod are reliably sealed; a sealing device and a guiding device are arranged on the peripheral cylindrical surface of the piston; the piston and the piston rod are integrated and are installed in the cylinder barrel, and reliable sealing and effective guiding are formed between the peripheral cylindrical surface of the piston and the inner wall of the cylinder barrel; the left end cover dustproof ring is arranged in the left end cover dustproof ring groove; the left end cover first sealing element is arranged in the left end cover first sealing ring groove; the left end cover second sealing element is arranged in the left end cover second sealing ring groove; the left end cover guide belt is installed into the left end cover guide belt groove; the left end cover is sleeved on the piston rod from left to right, and reliable sealing and effective guiding are formed between the outer cylindrical wall of the piston rod and a piston rod hole in the left end cover; the left end cover is reliably connected with the left end of the cylinder barrel, and meanwhile, reliable sealing is formed between the left end cover and the inner wall of the left end of the cylinder barrel; the piston and the piston rod form an axial movement relative to the cylinder; a left working cavity A and a right working cavity B are respectively formed in the hydraulic oil cylinder at two sides of the piston; the left end cover working oil port is communicated with the left working cavity A through a first oil through hole of the left end cover; the right end cover working oil port is communicated with the right working cavity B through a right end cover oil through hole; the left end cover working oil port and the right end cover working oil port are respectively communicated with a hydraulic system through oil pipes; the left end cover oil leakage port is directly connected to the oil tank through an oil pipe, and oil pressure is not formed at the left end cover oil leakage port.
The left end cover working oil port and the right end cover working oil port can be arranged at the left end and the right end of the cylinder barrel.
The invention has the following beneficial effects:
according to the hydraulic oil cylinder, the double-layer sealing device is arranged between the piston rod and the end cover of the hydraulic oil cylinder, the oil leakage groove is formed between the two layers of sealing devices, and the oil leakage groove is led out through the oil leakage port and the oil pipe to directly enter the oil tank, so that the external leakage risk of the hydraulic oil cylinder is greatly reduced, and the reliable work of a hydraulic system is ensured. The anti-leakage structure of the hydraulic oil cylinder can be applied to a hydraulic damper and a hydraulic buffer besides the hydraulic oil cylinder.
Drawings
The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a hydraulic cylinder with an external leakage service-proof function comprises a right end cover 1, a cylinder barrel 2, a piston 3, a piston rod 4, a left end cover 5, a left end cover dust ring 6, a left end cover first sealing element 7, a left end cover second sealing element 8 and a left end cover guide belt 9;
a right end cover oil through hole 1-1 is axially processed at the left part of the right end cover 1; a right end cover working oil port 1-2 is radially processed in the middle of the lower side of the right end cover 1; the right end cover working oil port 1-2 is communicated with the right end cover oil through hole 1-1; the middle part of the left end cover 5 is provided with a piston rod hole 5-10 which is axially communicated, and the circumferential inner wall of the piston rod hole 5-10 is sequentially provided with a left end cover dustproof ring groove 5-3, a left end cover first sealing ring groove 5-4, a left end cover leakage oil groove 5-5, a left end cover second sealing ring groove 5-8 and a left end cover guide belt groove 5-9 from left to right; a first oil through hole 5-1 of the left end cover is axially processed at the right part of the left end cover 5; a left end cover working oil port 5-2 is radially processed in the middle of the lower side of the left end cover 5; the working oil port 5-2 of the left end cover is communicated with the first oil through hole 5-1 of the left end cover; a left end cover oil leakage port 5-7 and a left end cover second oil through hole 5-6 are radially processed in the middle of the upper side of the left end cover 5; the left end cover oil leakage port 5-7 is communicated with the left end cover oil leakage groove 5-5 through a left end cover second oil through hole 5-6; the right end cover 1 and the right end of the cylinder barrel 2 are reliably connected, and meanwhile, reliable sealing is formed between the right end cover 1 and the inner wall of the right end of the cylinder barrel 2; the piston 3 and the piston rod 4 form reliable connection, and meanwhile, reliable sealing is formed between the piston 3 and the piston rod 4; a sealing device and a guiding device are arranged on the peripheral cylindrical surface of the piston 3; the piston 3 and the piston rod 4 are integrated and are arranged in the cylinder barrel 2, and reliable sealing and effective guiding are formed between the peripheral cylindrical surface of the piston 3 and the inner wall of the cylinder barrel 2; the left end cover dustproof ring 6 is arranged in the left end cover dustproof ring groove 5-3; the left end cover first sealing element 7 is installed into the left end cover first sealing ring groove 5-4; the left end cover second sealing element 8 is arranged in a left end cover second sealing ring groove 5-8; the left end cover guide belt 9 is installed into a left end cover guide belt groove 5-9; the left end cover 5 is sleeved on the piston rod 4 from left to right, and reliable sealing and effective guiding are formed between the cylindrical outer wall of the piston rod 4 and a piston rod hole 5-10 on the left end cover 5; the left end cover 5 is reliably connected with the left end of the cylinder barrel 2, and meanwhile, reliable sealing is formed between the left end cover 5 and the inner wall of the left end of the cylinder barrel 2; the piston 3 and the piston rod 4 are axially moved relative to the cylinder 2; a left working cavity A and a right working cavity B are respectively formed in the hydraulic oil cylinder at two sides of the piston 3; the working oil port 5-2 of the left end cover is communicated with the left working cavity A through a first oil through hole 5-1 of the left end cover; the right end cover working oil port 1-2 is communicated with the right working cavity B through the right end cover oil through hole 1-1; the left end cover working oil port 5-2 and the right end cover working oil port 1-2 are respectively communicated with a hydraulic system through oil pipes; the left end cover oil leakage port 5-7 is directly connected to the oil tank through an oil pipe, and oil pressure is not formed at the left end cover oil leakage port 5-7.
The left end cover working port 5-2 and the right end cover working port 1-2 can also be arranged at the left end and the right end of the cylinder barrel 2.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (2)

1. The utility model provides a hydraulic cylinder with external leakage is prevented affairs function which characterized in that: the device comprises a right end cover (1), a cylinder barrel (2), a piston (3), a piston rod (4), a left end cover (5), a left end cover dust ring (6), a left end cover first sealing element (7), a left end cover second sealing element (8) and a left end cover guide belt (9);
a right end cover oil through hole (1-1) is axially processed at the left part of the right end cover (1); a right end cover working oil port (1-2) is radially processed in the middle of the lower side of the right end cover (1); the right end cover working oil port (1-2) is communicated with the right end cover oil through hole (1-1); a piston rod hole (5-10) which is axially communicated is formed in the middle of the left end cover (5), and a left end cover dustproof ring groove (5-3), a left end cover first sealing ring groove (5-4), a left end cover leakage oil groove (5-5), a left end cover second sealing ring groove (5-8) and a left end cover guide belt groove (5-9) are sequentially formed in the circumferential inner wall of the piston rod hole (5-10) from left to right; a first oil through hole (5-1) of the left end cover is axially processed at the right part of the left end cover (5); a left end cover working oil port (5-2) is radially processed in the middle of the lower side of the left end cover (5); the working oil port (5-2) of the left end cover is communicated with the first oil through hole (5-1) of the left end cover; a left end cover oil leakage opening (5-7) and a left end cover second oil through hole (5-6) are radially processed in the middle of the upper side of the left end cover (5); the left end cover oil leakage port (5-7) is communicated with the left end cover oil leakage groove (5-5) through the left end cover second oil through hole (5-6); the right end cover (1) is reliably connected with the right end of the cylinder barrel (2), and meanwhile, reliable sealing is formed between the right end cover (1) and the inner wall of the right end of the cylinder barrel (2); the piston (3) and the piston rod (4) are reliably connected, and meanwhile, the piston (3) and the piston rod (4) are reliably sealed; a sealing device and a guiding device are arranged on the peripheral cylindrical surface of the piston (3); the piston (3) and the piston rod (4) are integrated and are installed in the cylinder barrel (2), and reliable sealing and effective guiding are formed between the peripheral cylindrical surface of the piston (3) and the inner wall of the cylinder barrel (2); the left end cover dustproof ring (6) is installed into the left end cover dustproof ring groove (5-3); the left end cover first sealing element (7) is installed into the left end cover first sealing ring groove (5-4); the left end cover second sealing piece (8) is installed into the left end cover second sealing ring groove (5-8); the left end cover guide belt (9) is installed into a left end cover guide belt groove (5-9); the left end cover (5) is sleeved on the piston rod (4) from left to right, and reliable sealing and effective guiding are formed between the cylindrical outer wall of the piston rod (4) and a piston rod hole (5-10) on the left end cover (5); the left end cover (5) is reliably connected with the left end of the cylinder barrel (2), and meanwhile, reliable sealing is formed between the left end cover (5) and the inner wall of the left end of the cylinder barrel (2); the piston (3) and the piston rod (4) form an axial movement relative to the cylinder (2); a left working cavity A and a right working cavity B are respectively formed in the hydraulic oil cylinder at two sides of the piston (3); the left end cover working oil port (5-2) is communicated with the left working cavity A through a first oil through hole (5-1) of the left end cover; the right end cover working oil port (1-2) is communicated with the right working cavity B through the right end cover oil through hole (1-1); the left end cover working oil port (5-2) and the right end cover working oil port (1-2) are respectively communicated with a hydraulic system through oil pipes; the left end cover oil leakage port (5-7) is directly connected to the oil tank through an oil pipe, and oil pressure is not formed in the left end cover oil leakage port (5-7).
2. The hydraulic oil cylinder with the external leakage service-proof function as claimed in claim 1, characterized in that: the left end cover working oil port (5-2) and the right end cover working oil port (1-2) can also be arranged at the left end and the right end of the cylinder barrel (2).
CN202010617846.5A 2020-06-30 2020-06-30 Hydraulic cylinder with external leakage service-proof function Withdrawn CN111894935A (en)

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CN202010617846.5A CN111894935A (en) 2020-06-30 2020-06-30 Hydraulic cylinder with external leakage service-proof function

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CN202010617846.5A CN111894935A (en) 2020-06-30 2020-06-30 Hydraulic cylinder with external leakage service-proof function

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280600A (en) * 1979-07-02 1981-07-28 Otis Elevator Company Self-refilling hydraulic actuator
DE3206432C2 (en) * 1982-02-23 1984-04-05 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Protective jacket for preventing weld spatter from adhering to a piston rod of a working cylinder on welding devices and a method for producing such a protective jacket
CN102367857A (en) * 2011-09-20 2012-03-07 宁波一力减震器有限公司 Adjustable force type hydraulic damper
EP2657541A2 (en) * 2012-04-24 2013-10-30 Parker Hannifin Manufacturing Germany GmbH & Co. KG Sealing assembly for a cylinder sealing assembly
CN106286464A (en) * 2016-09-02 2017-01-04 武汉市天毅达测控科技有限公司 A kind of end mechanical self-locking hydraulic cylinder of band buffering
EP3252319A1 (en) * 2016-06-03 2017-12-06 Ognibene Power S.P.A. An assembly method of a piston-cylinder group and a piston-cylinder group thus obtained

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280600A (en) * 1979-07-02 1981-07-28 Otis Elevator Company Self-refilling hydraulic actuator
DE3206432C2 (en) * 1982-02-23 1984-04-05 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Protective jacket for preventing weld spatter from adhering to a piston rod of a working cylinder on welding devices and a method for producing such a protective jacket
CN102367857A (en) * 2011-09-20 2012-03-07 宁波一力减震器有限公司 Adjustable force type hydraulic damper
EP2657541A2 (en) * 2012-04-24 2013-10-30 Parker Hannifin Manufacturing Germany GmbH & Co. KG Sealing assembly for a cylinder sealing assembly
EP3252319A1 (en) * 2016-06-03 2017-12-06 Ognibene Power S.P.A. An assembly method of a piston-cylinder group and a piston-cylinder group thus obtained
CN106286464A (en) * 2016-09-02 2017-01-04 武汉市天毅达测控科技有限公司 A kind of end mechanical self-locking hydraulic cylinder of band buffering

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