CN112901595A - Multistage oil cylinder with buffer structure - Google Patents

Multistage oil cylinder with buffer structure Download PDF

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Publication number
CN112901595A
CN112901595A CN202110243911.7A CN202110243911A CN112901595A CN 112901595 A CN112901595 A CN 112901595A CN 202110243911 A CN202110243911 A CN 202110243911A CN 112901595 A CN112901595 A CN 112901595A
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CN
China
Prior art keywords
cylinder barrel
stage
stage cylinder
oil
cylinder
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Pending
Application number
CN202110243911.7A
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Chinese (zh)
Inventor
姚德帅
黄金波
姚博瀚
施卫平
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Shandong Bentu Hydraulic Technology Co ltd
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Shandong Bentu Hydraulic Technology Co ltd
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Priority to CN202110243911.7A priority Critical patent/CN112901595A/en
Publication of CN112901595A publication Critical patent/CN112901595A/en
Pending 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
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • 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
    • F15B15/1471—Guiding means other than in the end cap
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • 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
    • F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
    • F15B2215/30—Constructional details thereof

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention provides a multistage oil cylinder with a buffer structure, which comprises: compared with the prior art, the invention has the following beneficial effects that: through at the one-level cylinder, the second grade cylinder, tertiary cylinder, a plurality of oil gallery are processed to level four cylinder and last stage cylinder external diameter, make the one-level cylinder, the second grade cylinder, tertiary cylinder, level four cylinder and last stage cylinder are in when normally stretching out the district, can realize quick oil return and stretch out fast, improve multi-stage cylinder's work efficiency, guide ring one, guide ring two, spacing step, the design of first buffer zone and second buffer zone, make the flexible cylinder of each level realize the speed reduction buffering when being close the stroke end, make spacing step and location step's contact surface produce on the flexible cylinder of adjacent two-stage no impact, reduce multi-stage cylinder fault rate and increase of service life.

Description

Multistage oil cylinder with buffer structure
Technical Field
The invention belongs to the field of hydraulic equipment, and particularly relates to a multistage oil cylinder with a buffer structure.
Background
At present, the oil cylinder is a hydraulic actuating element for realizing reciprocating motion and swinging motion less than 360 degrees in a hydraulic transmission system, and has the advantages of simple structure, reliable work, easy manufacture, convenient use and maintenance, good low-speed stability and the like, so that the oil cylinder is widely applied to various departments in industrial production and is mainly applied to the following steps: shoveling mechanisms and lifting mechanisms of excavators and loaders in engineering machinery.
However, the conventional integral stepped multi-stage oil cylinder and limit key structure type multi-stage oil cylinder on the market cannot slow down the extension speed when each stage moves to the tail end of the stroke, so that buffering is realized, the impact force of adjacent two stages of contact surfaces is high, the cylinder barrel is easy to impact and deform, the outer diameter and the inner diameter are scratched, serious cylinder scuffing oil leakage accidents are caused, the failure rate of the multi-stage oil cylinder is greatly increased, and the service life of the multi-stage oil cylinder is shortened.
Therefore, a multi-stage oil cylinder with a buffer structure is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a multi-stage oil cylinder with a buffer structure so as to solve the problems in the background technology.
The technical scheme of the invention is realized as follows: a multi-stage oil cylinder with a buffer structure comprises: the oil seal device comprises a base cylinder, a first guide ring, a first stage cylinder, a second stage cylinder, a third stage cylinder, a fourth stage cylinder, a last stage cylinder, a second guide ring, a dust ring and an oil seal, wherein a base is arranged at the left end of the base cylinder, an oil cavity I is arranged in the base cylinder, a limiting step is arranged at the right end of the inner wall of the base cylinder, the second guide ring is arranged at the left side of the right end of the inner wall of the base cylinder, the second guide ring is arranged at the right side of the limiting step, the oil seal is arranged at the right end of the inner wall of the base cylinder, the oil seal is positioned between the second guide rings, the dust ring is arranged at the right end of the inner wall of the base cylinder, the dust ring is positioned at the right side of the oil seal, an oil inlet is arranged on the upper surface of the left end of the base cylinder, an oil inlet is arranged in the, the outer surface of the left end of the first-stage cylinder barrel is provided with a first guide ring, the outer surface of the left end of the first-stage cylinder barrel is provided with a positioning step, the left end of the first-stage cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, a first buffer area is arranged between the left end of the first-stage cylinder barrel and the right end of the base barrel, the first buffer area is positioned on the left side of the limiting step, a second buffer area is arranged between the left end of the first-stage cylinder barrel and the right end of the base barrel, the second buffer area is positioned between a second guide ring and the first-stage cylinder barrel, a second-stage cylinder barrel is arranged in the first-stage cylinder barrel and is movably arranged in the first-stage cylinder barrel through a second oil cavity, a third-stage cylinder barrel is arranged in the second-stage cylinder barrel, the level four cylinder passes through four movable mounting in the tertiary cylinder of oil chamber inside, level four cylinder inside is equipped with oil chamber five, level four cylinder internally mounted has the final stage cylinder, the final stage cylinder passes through five movable mounting in the level four cylinder of oil chamber inside, the inside oil chamber six that is equipped with of final stage cylinder, the final stage cylinder right-hand member is equipped with the cylinder tip.
As a preferred embodiment, a first guide ring is arranged on the outer surface of the left end of the second-stage cylinder barrel, a positioning step is arranged on the outer surface of the left end of the second-stage cylinder barrel, an oil return hole is formed in the left end of the second-stage cylinder barrel and is positioned on the right side of the positioning step, a second guide ring is arranged on the left side of the right end of the inner wall of the second-stage cylinder barrel and is positioned on the right side of the positioning step, an oil seal groove, a guide ring groove and a dust-proof groove are machined in the inner diameter of the right end of the second-stage cylinder barrel, an oil seal is arranged on the right end of the inner wall of the second-stage cylinder barrel and is positioned between the second guide rings, two guide rings and two oil seals are arranged respectively, a dust-proof ring is arranged on the right end of the inner wall of the second-stage cylinder barrel, and a second buffer area is arranged between the left end of the second-stage cylinder barrel and the right end of the first-stage cylinder barrel and is positioned between the second guide ring and the second-stage cylinder barrel.
As a preferred embodiment, a first guide ring is arranged on the outer surface of the left end of the tertiary cylinder barrel, a positioning step is arranged on the outer surface of the left end of the tertiary cylinder barrel, an oil return hole is formed in the left end of the tertiary cylinder barrel and is positioned on the right side of the positioning step, a limiting step is arranged on the right end of the inner wall of the tertiary cylinder barrel, a second guide ring is arranged on the left side of the right end of the inner wall of the tertiary cylinder barrel and is positioned on the right side of the limiting step, an oil seal groove, a guide ring groove and a dust-proof groove are machined in the inner diameter of the right end of the tertiary cylinder barrel, an oil seal is arranged on the right end of the inner wall of the tertiary cylinder barrel and is positioned between the second guide rings, two second guide rings and two oil seals are respectively arranged, a dust-proof ring is arranged on the right end of the inner wall, and a second buffer area is arranged between the left end of the third-stage cylinder barrel and the right end of the second-stage cylinder barrel and is positioned between the second guide ring and the third-stage cylinder barrel.
As a preferred embodiment, a first guide ring is arranged on the outer surface of the left end of the four-stage cylinder barrel, a positioning step is arranged on the outer surface of the left end of the four-stage cylinder barrel, an oil return hole is formed in the left end of the four-stage cylinder barrel and is positioned on the right side of the positioning step, a second guide ring is arranged on the left side of the right end of the inner wall of the four-stage cylinder barrel, the second guide ring is positioned on the right side of the positioning step, an oil seal groove, a guide ring groove and a dust-proof groove are formed in the inner diameter of the right end of the four-stage cylinder barrel, an oil seal is arranged on the right end of the inner wall of the four-stage cylinder barrel, the oil seal is positioned between the second guide rings, two guide rings and two oil seals are respectively arranged, a dust-proof ring is arranged on the right side of the oil seal, a first buffer, and a second buffer area is arranged between the left end of the four-stage cylinder barrel and the right end of the three-stage cylinder barrel and is positioned between the second guide ring and the four-stage cylinder barrel.
As a preferred embodiment, a first guide ring is arranged on the outer surface of the left end of the last cylinder barrel, a positioning step is arranged on the outer surface of the left end of the last cylinder barrel, an oil return hole is formed in the left end of the last cylinder barrel and is positioned on the right side of the positioning step, a limiting step is arranged on the right end of the inner wall of the last cylinder barrel, a second guide ring is arranged on the left side of the right end of the inner wall of the last cylinder barrel and is positioned on the right side of the limiting step, an oil seal is arranged on the right end of the inner wall of the last cylinder barrel and is positioned between the second guide rings, two oil seals are arranged on the second guide ring and the two oil seals respectively, a dust ring is arranged on the right end of the inner wall of the last cylinder barrel and is positioned on the right side of the oil seal, a first buffer zone is arranged between the left end of the, the second buffer zone is located between the second guide ring and the last stage cylinder barrel.
In a preferred embodiment, the first guide ring and the second guide ring are respectively divided into five groups, and each group is provided with two guide rings.
As a preferred embodiment, the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel are all provided with a normal extending area, the normal extending area is positioned between the positioning step and the limiting step, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel in the normal extending area is 2.5mm, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel in the first buffer area is 0.35mm, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel in the second buffer area is 0.15, the failure rate of the multi-stage oil cylinder is reduced, and the service life is prolonged.
After the technical scheme is adopted, the invention has the beneficial effects that: through at the one-level cylinder, the second grade cylinder, tertiary cylinder, a plurality of oil gallery are processed to level four cylinder and last stage cylinder external diameter, make the one-level cylinder, the second grade cylinder, tertiary cylinder, level four cylinder and last stage cylinder are in when normally stretching out the district, can realize quick oil return and stretch out fast, improve multi-stage cylinder's work efficiency, guide ring one, guide ring two, spacing step, the design of first buffer zone and second buffer zone, make the flexible cylinder of each level realize the speed reduction buffering when being close the stroke end, make spacing step and location step's contact surface produce on the flexible cylinder of adjacent two-stage, reduce multi-stage cylinder fault rate and increase of service life, reduce the risk that multi-stage cylinder broke the jar even.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic sectional view of a multi-stage cylinder with a buffer structure according to the present invention.
Fig. 2 is an extended schematic view of a multi-stage cylinder with a buffer structure according to the present invention.
Fig. 3 is an extended schematic view of a multi-stage cylinder with a buffer structure according to the present invention.
In the figure, 1-base cylinder, 2-base, 3-guide ring I, 4-oil inlet, 5-oil inlet, 6-first-stage cylinder, 7-second-stage cylinder, 8-third-stage cylinder, 9-fourth-stage cylinder, 10-last-stage cylinder, 11-cylinder end, 12-dust ring, 13-oil seal, 14-guide ring II, 15-limit step, 16-positioning step, 17-oil cavity I, 18-oil cavity II, 19-oil cavity III, 20-oil cavity IV, 21-oil cavity V, 22-oil cavity VI, 23-first buffer zone, 24-second buffer zone and 25-oil return hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a multi-stage oil cylinder with a buffer structure comprises: the oil seal device comprises a base cylinder 1, a first guide ring 3, a first-stage cylinder 6, a second-stage cylinder 7, a third-stage cylinder 8, a fourth-stage cylinder 9, a last-stage cylinder 10, a second guide ring 14, a dust ring 12 and an oil seal 13, wherein the left end of the base cylinder 1 is provided with a base 2, the inside of the base cylinder 1 is provided with an oil cavity 17, the right end of the inner wall of the base cylinder 1 is provided with a limiting step 15, the left side of the right end of the inner wall of the base cylinder 1 is provided with the second guide ring 14, the second guide ring 14 is positioned on the right side of the limiting step 15, the right end of the inner wall of the base cylinder 1 is provided with the oil seal 13, the oil seal 13 is positioned between the second guide rings 14, the right end of the inner wall of the base cylinder 1 is provided with the dust ring 12, the dust ring 12 is positioned on the right side of the oil seal 13, the upper surface of the left end of, an oil cavity II 18 is arranged inside the first-stage cylinder barrel 6, a guide ring I3 is arranged on the outer surface of the left end of the first-stage cylinder barrel 6, a positioning step 16 is arranged on the outer surface of the left end of the first-stage cylinder barrel 6, an oil return hole 25 is formed in the left end of the first-stage cylinder barrel 6, the oil return hole 25 is positioned on the right side of the positioning step 16, a first buffer area 23 is arranged between the left end of the first-stage cylinder barrel 6 and the right end of the base barrel 1, the first buffer area 23 is positioned on the left side of a limiting step 15, a second buffer area 24 is arranged between the left end of the first-stage cylinder barrel 6 and the right end of the base barrel 1, the second buffer area 24 is positioned between a guide ring II 14 and the first-stage cylinder barrel 6, a second-stage cylinder barrel 7 is arranged inside the first-stage cylinder barrel 6, the second-stage cylinder barrel, three-level cylinder 8 is inside to be equipped with oil pocket four 20, and 8 internally mounted of three-level cylinder has level four cylinder 9, and level four cylinder 9 passes through four 20 movable mounting in three-level cylinder 8 of oil pocket inside, and level four cylinder 9 is inside to be equipped with five 21 of oil pocket, and 9 internally mounted of level four cylinder has last stage cylinder 10, and last stage cylinder 10 passes through five 21 movable mounting in level four cylinder 9 of oil pocket inside, and last stage cylinder 10 is inside to be equipped with six 22 of oil pocket, and last stage cylinder 10 right-hand member is equipped.
The outer surface of the left end of the second-stage cylinder barrel 7 is provided with a first guide ring 3, the outer surface of the left end of the second-stage cylinder barrel 7 is provided with a positioning step 16, the left end of the second-stage cylinder barrel 7 is provided with an oil return hole 25, the oil return hole 25 is positioned on the right side of the positioning step 16, the right end of the inner wall of the second-stage cylinder barrel 7 is provided with a limiting step 15, the left side of the right end of the inner wall of the second-stage cylinder barrel 7 is provided with a second guide ring 14, the second guide ring 14 is positioned on the right side of the limiting step 15, the inner diameter of the right end of the second-stage cylinder barrel 7 is provided with an oil seal groove, a guide ring groove and a dust-proof groove, the right end of the inner wall of the second-stage cylinder barrel 7 is provided with an oil seal 13, the oil seal 13 is positioned between the second guide ring 14, and a second buffer area 24 is arranged between the left end of the second-stage cylinder barrel 7 and the right end of the first-stage cylinder barrel 6, and the second buffer area 24 is positioned between the second guide ring 14 and the second-stage cylinder barrel 7 and used for installing the third-stage cylinder barrel 8 and connecting the third-stage cylinder barrel 8 with the first-stage cylinder barrel 6.
The outer surface of the left end of the third-level cylinder barrel 8 is provided with a first guide ring 3, the outer surface of the left end of the third-level cylinder barrel 8 is provided with a positioning step 16, the left end of the third-level cylinder barrel 8 is provided with an oil return hole 25, the oil return hole 25 is positioned on the right side of the positioning step 16, the right end of the inner wall of the third-level cylinder barrel 8 is provided with a limiting step 15, the left side of the right end of the inner wall of the third-level cylinder barrel 8 is provided with a second guide ring 14, the second guide ring 14 is positioned on the right side of the limiting step 15, the inner diameter of the right end of the third-level cylinder barrel 8 is provided with an oil seal groove, a guide ring groove and a dust-proof groove, the right end of the inner wall of the third-level cylinder barrel 8 is provided with an oil seal 13, the oil seal 13 is positioned between the second guide ring 14, the two, be equipped with second buffer 24 between three-level cylinder 8 left end and the 7 right-hand members of second grade cylinder, second buffer 24 is located between guide ring two 14 and the three-level cylinder 8 for installation level four cylinder 9 is connected level four cylinder 9 and second grade cylinder 7.
A first guide ring 3 is arranged on the outer surface of the left end of a fourth-stage cylinder barrel 9, a positioning step 16 is arranged on the outer surface of the left end of the fourth-stage cylinder barrel 9, an oil return hole 25 is formed in the left end of the fourth-stage cylinder barrel 9, the oil return hole 25 is positioned on the right side of the positioning step 16, a limiting step 15 is arranged on the right end of the inner wall of the fourth-stage cylinder barrel 9, a second guide ring 14 is arranged on the left side of the right end of the inner wall of the fourth-stage cylinder barrel 9, the second guide ring 14 is positioned on the right side of the limiting step 15, an oil seal groove, a guide ring groove and a dust-proof groove are formed in the inner diameter of the right end of the fourth-stage cylinder barrel 9, an oil seal 13 is arranged on the right end of the inner wall of the fourth-stage cylinder barrel 9, the oil seal 13 is positioned between the second guide rings 14, two, and a second buffer area 24 is arranged between the left end of the four-stage cylinder barrel 9 and the right end of the three-stage cylinder barrel 8, and the second buffer area 24 is positioned between the second guide ring 14 and the four-stage cylinder barrel 9 and used for installing the final-stage cylinder barrel 10 and connecting the final-stage cylinder barrel 10 with the three-stage cylinder barrel 8.
A first guide ring 3 is arranged on the outer surface of the left end of a last cylinder barrel 10, a positioning step 16 is arranged on the outer surface of the left end of the last cylinder barrel 10, an oil return hole 25 is formed in the left end of the last cylinder barrel 10, the oil return hole 25 is positioned on the right side of the positioning step 16, a limiting step 15 is arranged on the right end of the inner wall of the last cylinder barrel 10, a second guide ring 14 is arranged on the left side of the right end of the inner wall of the last cylinder barrel 10, the second guide ring 14 is positioned on the right side of the limiting step 15, an oil seal 13 is arranged on the right end of the inner wall of the last cylinder barrel 10, the oil seal 13 is positioned between the second guide rings 14, two guide rings 14 and two oil seals 13 are respectively arranged, a dust ring 12 is arranged on the right end of the inner wall of the last cylinder barrel 10, a first buffer area 23 is arranged between the left end of, a second buffer 24 is located between the second guide ring 14 and the last cylinder barrel 10 for connection of the working device while sealing the entire multistage cylinder.
The first guide ring 3 and the second guide ring 14 are respectively divided into five groups, and each group is provided with two guide rings and is used for forming a second buffer area 24, so that the speed reduction buffer at the tail end of each stage of stroke of the multi-stage oil cylinder eliminates impact force.
The base cylinder 1, the first-stage cylinder 6, the second-stage cylinder 7, the third-stage cylinder 8, the fourth-stage cylinder 9 and the last-stage cylinder 10 are all provided with normal extending areas, the normal extending areas are positioned between the positioning step 16 and the limiting step 15, the distance between the base cylinder 1, the first-stage cylinder 6, the second-stage cylinder 7, the third-stage cylinder 8, the fourth-stage cylinder 9 and the last-stage cylinder 10 in the normal extending areas is 2.5mm, the distance between the base cylinder 1, the first-stage cylinder 6, the second-stage cylinder 7, the third-stage cylinder 8, the fourth-stage cylinder 9 and the last-stage cylinder 10 in the first buffer area 23 is 0.35mm, the distance between the base cylinder 1, the first-stage cylinder 6, the second-stage cylinder 7, the third-stage cylinder 8, the fourth-stage cylinder 9 and the last-stage cylinder 10 in the second buffer area 24 is 0.15mm, and the speed reduction and buffering of, the impact force is eliminated, the failure rate of the multi-stage oil cylinder is reduced, and the service life is prolonged.
As an embodiment of the present invention: in practical use, when each stage of the multi-stage oil cylinder works in a normal extension area, the distance between the inner diameter of the next stage of cylinder 6 and the outer diameter of the previous stage of cylinder 6 in the radius direction is 2.5mm, and the multi-stage oil cylinder can realize quick oil return and quick extension by matching with a plurality of oil return holes 25; when the multi-stage oil cylinder moves to the first buffer area 23, hydraulic oil is extruded through the oil return hole 25 to flow back through a gap between the inner diameter of the step in the next-stage cylinder barrel 6 and the outer diameter of the previous-stage cylinder barrel 6, and the gap between the next-stage cylinder barrel 6 and the previous-stage cylinder barrel 6 in the radius direction is 0.35mm when the multi-stage oil cylinder is located in the first buffer area 23, so that the effective volume of the oil return in the extrusion gap is reduced relative to the effective volume of the normal extension area, the extension speed is reduced compared with the normal extension speed, and the one-.
As an embodiment of the present invention: when the multi-stage oil cylinder moves to the second buffer area 24 in actual use, the inner guide ring of the next-stage cylinder 6 and the outer diameter of the previous stage are matched with each other to extrude and flow back through the oil return hole 25, the gap is continuously reduced, the gap in the radius direction is 0.15mm, the effective volume of the extrusion gap oil return is reduced to the maximum limit relative to the effective volume of the normal extension area, the extension speed is reduced to the minimum compared with the normal extension speed, the two-stage buffer of the multi-stage oil cylinder is realized, the extension speed of the stroke multi-stage oil cylinder when the cylinder moves to the tail end of the stroke is very slow, the speed reduction buffer of the telescopic cylinder of each stage is realized when the telescopic cylinder of each stage approaches the tail end of the stroke, no impact force is generated on the contact surfaces of the limiting steps and the positioning steps on the adjacent two-stage telescopic cylinders.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A multi-stage oil cylinder with a buffer structure comprises: base section of thick bamboo, guide ring one, one-level cylinder, second grade cylinder, tertiary cylinder, level four cylinder, last stage cylinder, guide ring two, dust ring, oil blanket, its characterized in that: the base is arranged at the left end of the base cylinder, a first oil cavity is arranged in the base cylinder, a limiting step is arranged at the right end of the inner wall of the base cylinder, a second guide ring is arranged at the left side of the right end of the inner wall of the base cylinder, the second guide ring is positioned at the right side of the limiting step, an oil seal is arranged at the right end of the inner wall of the base cylinder, the oil seal is positioned between the second guide rings, a dust ring is arranged at the right end of the inner wall of the base cylinder, the dust ring is positioned at the right side of the oil seal, an oil inlet is arranged on the upper surface of the left end of the base cylinder, an oil inlet is formed in the oil inlet, the lower end of the oil inlet is communicated with the interior of the first oil cavity, a first-stage cylinder is movably arranged in the first oil cavity, the first-stage cylinder is movably, the left end of the first-stage cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, a first buffer area is arranged between the left end of the first-stage cylinder barrel and the right end of the base barrel, the first buffer area is positioned on the left side of the limiting step, a second buffer area is arranged between the left end of the first-stage cylinder barrel and the right end of the base barrel, the second buffer area is positioned between the guide ring II and the first-stage cylinder barrel, a second-stage cylinder barrel is arranged in the first-stage cylinder barrel and movably mounted in the first-stage cylinder barrel through an oil cavity II, an oil cavity III is arranged in the second-stage cylinder barrel, a third-stage cylinder barrel is arranged in the second-stage cylinder barrel and movably mounted in the second-stage cylinder barrel through the oil cavity III, an oil cavity IV is arranged, the inside oil pocket five that is equipped with of level four cylinder, level four cylinder internally mounted has the last stage cylinder, the last stage cylinder passes through five movable mounting in level four cylinder in the oil pocket inside, the inside oil pocket six that is equipped with of last stage cylinder, last stage cylinder right-hand member is equipped with the cylinder tip.
2. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the outer surface of the left end of the second-stage cylinder barrel is provided with a first guide ring, the outer surface of the left end of the second-stage cylinder barrel is provided with a positioning step, the left end of the second-stage cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, the right end of the inner wall of the second-stage cylinder barrel is provided with a limiting step, the left side of the right end of the inner wall of the second-stage cylinder barrel is provided with a second guide ring, the right side of the limiting step is provided with a second guide ring, the inner diameter of the right end of the inner wall of the second-stage cylinder barrel is provided with an oil seal groove, a guide ring groove and a dust-proof groove, the right end of the inner wall of the second-stage cylinder barrel is provided with an oil seal, the oil seal is positioned between the second guide ring, and a second buffer area is arranged between the left end of the second-stage cylinder barrel and the right end of the first-stage cylinder barrel and is positioned between the second guide ring and the second-stage cylinder barrel.
3. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the outer surface of the left end of the third-level cylinder barrel is provided with a first guide ring, the outer surface of the left end of the third-level cylinder barrel is provided with a positioning step, the left end of the third-level cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, the right end of the inner wall of the third-level cylinder barrel is provided with a limiting step, the left side of the right end of the inner wall of the third-level cylinder barrel is provided with a second guide ring, the right side of the limiting step is provided with a second guide ring, the inner diameter of the right end of the inner wall of the third-level cylinder barrel is provided with an oil seal groove, a guide ring groove and a dust-proof groove, the right end of the inner wall of the third-level cylinder barrel is provided with an oil seal, the oil seal is positioned between the second guide rings, and a second buffer area is arranged between the left end of the third-stage cylinder barrel and the right end of the second-stage cylinder barrel and is positioned between the second guide ring and the third-stage cylinder barrel.
4. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the outer surface of the left end of the four-stage cylinder barrel is provided with a first guide ring, the outer surface of the left end of the four-stage cylinder barrel is provided with a positioning step, the left end of the four-stage cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, the right end of the inner wall of the four-stage cylinder barrel is provided with a limiting step, the left side of the right end of the inner wall of the four-stage cylinder barrel is provided with a second guide ring, the right side of the limiting step is provided with a second guide ring, the inner diameter of the right end of the inner wall of the four-stage cylinder barrel is provided with an oil seal groove, a guide ring groove and a dust-proof groove, the right end of the inner wall of the four-stage cylinder barrel is provided with an oil seal, the oil seal is positioned between the second guide ring, and a second buffer area is arranged between the left end of the four-stage cylinder barrel and the right end of the three-stage cylinder barrel and is positioned between the second guide ring and the four-stage cylinder barrel.
5. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the outer surface of the left end of the last-stage cylinder barrel is provided with a first guide ring, the outer surface of the left end of the last-stage cylinder barrel is provided with a positioning step, the left end of the last-stage cylinder barrel is provided with an oil return hole, the oil return hole is positioned on the right side of the positioning step, the right end of the inner wall of the last-stage cylinder barrel is provided with a limiting step, the left side of the right end of the inner wall of the last-stage cylinder barrel is provided with a second guide ring, the right end of the inner wall of the last-stage cylinder barrel is provided with an oil seal, the oil seal is positioned between the second guide rings, two oil seals are respectively arranged, the right end of the inner wall of the last-stage cylinder barrel is provided with a dust ring, the dust ring is positioned on the right side of the oil seal, a first buffer zone is arranged between, the second buffer zone is located between the second guide ring and the last stage cylinder barrel.
6. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the first guide ring and the second guide ring are respectively divided into five groups, and each group is provided with two guide rings.
7. The multi-stage oil cylinder with a buffer structure as claimed in claim 1, wherein: the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the final-stage cylinder barrel are all provided with normal extending areas, the normal extension area is positioned between the positioning step and the limiting step, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the final-stage cylinder barrel in the normal extension area is 2.5mm, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel in the first buffer area is 0.35mm, the distance between the base cylinder, the first-stage cylinder barrel, the second-stage cylinder barrel, the third-stage cylinder barrel, the fourth-stage cylinder barrel and the last-stage cylinder barrel in the second buffer area is 0.15mm, the multi-stage oil cylinder speed reduction buffer device is used for realizing speed reduction buffer at the tail end of each stage of stroke of the multi-stage oil cylinder on the premise of not changing other parameters, eliminating impact force, reducing the failure rate of the multi-stage oil cylinder and prolonging the service life.
CN202110243911.7A 2021-03-05 2021-03-05 Multistage oil cylinder with buffer structure Pending CN112901595A (en)

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Application Number Priority Date Filing Date Title
CN202110243911.7A CN112901595A (en) 2021-03-05 2021-03-05 Multistage oil cylinder with buffer structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110243911.7A CN112901595A (en) 2021-03-05 2021-03-05 Multistage oil cylinder with buffer structure

Publications (1)

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CN112901595A true CN112901595A (en) 2021-06-04

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CN202110243911.7A Pending CN112901595A (en) 2021-03-05 2021-03-05 Multistage oil cylinder with buffer structure

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Country Link
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