CN110410381A - A kind of heavy duty multistage composite telescopic hydraulic cylinder - Google Patents
A kind of heavy duty multistage composite telescopic hydraulic cylinder Download PDFInfo
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- CN110410381A CN110410381A CN201910750372.9A CN201910750372A CN110410381A CN 110410381 A CN110410381 A CN 110410381A CN 201910750372 A CN201910750372 A CN 201910750372A CN 110410381 A CN110410381 A CN 110410381A
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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
-
- 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
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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
- F15B15/1471—Guiding means other than in the end cap
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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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- 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)
- Actuator (AREA)
Abstract
The present invention relates to a kind of heavy duty multistage composite telescopic hydraulic cylinders, are related to technical field of fluid transmission.The present invention can significantly improve the stretching speed of heavy duty multistage hydraulic cylinder by the matched design between Multi-stage cylinder, and the grade impact frequency is changed in reduction, solve the problems, such as that existing composite telescopic hydraulic cylinder processing and manufacturing is difficult, can not assemble, can not shift to an earlier date it is oil-filled；And the synchronous error generated in hydraulic cylinder reciprocating motion can be eliminated, and fabricate simple, easy installation maintenance.
Description
Technical field
The present invention relates to technical field of fluid transmission, and in particular to a kind of heavy duty multistage composite telescopic hydraulic cylinder.
Background technique
Hydraulic cylinder is reciprocating motion class executive component important in hydraulic system.Compared to single stage hydraulic cylinder, multi-stage expansion liquid
Cylinder pressure has many advantages, such as that initial locating distance is shorter, stroke is longer, applies in the large-scale heavy duties such as dumper, crane lifting equipment
Extensively.Currently, large-scale heavy duty lifting equipment mostly uses traditional plunger or piston-type multi-stage hydraulic cylinder, plungers or piston at different levels are needed
It stretches out step by step, it is slower to stretch out speed.In addition, plungers at different levels or piston rod also need to change grade, hydraulic cylinder effective working face when changing grade
Product change dramatically, causes system pressure and cylinder movement velocity to be mutated, and then collides and vibratory impulse, not only influences mechanical dress
Standby functional reliability, has an effect on lifting working efficiency.For demands such as hydraulic elevator, high-altitude operation vehicles, occur again in recent years
The multistage hydraulic cylinder of synchronization telescope, though such hydraulic cylinder have many advantages, such as movement velocity it is fast, there is no grade impact is changed, in heavy burden
Under load effect, hydraulic cylinder appearance cavity pressure is higher, and the outer dimension of cylinder is larger, is not suitable for the limited heavy duty lifting of installation space
Occasion.
Therefore, how to design a kind of becomes technical problem urgently to be resolved suitable for heavy duty hydraulic cylinder.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is how to design a kind of suitable for heavy duty hydraulic cylinder.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of heavy duty multistage composite telescopic hydraulic cylinders, including
Cylinder barrel 1, first-stage cylinder 2, secondary cylinder 3, three-level cylinder 4, cylinder head 5, cylinder bottom 6；The cylinder barrel 1, first-stage cylinder 2, secondary cylinder 3 and three-level cylinder 4
Successively nesting forms ecto-entad；The cylinder barrel 1 is cylinder-like structure, and the piston rod portion realization of head end and first-stage cylinder 2 is close
Envelope and support, the tail end outer rim of cylinder barrel 1 connect and seal with cylinder bottom 6；The head end and cylinder head 5 of the piston rod portion of three-level cylinder 4 connect
It connects and seals.
Preferably, the head end inner wall of the cylinder barrel 1 is sequentially installed with the first dustband 10, the second lattice along axial ecto-entad
Lay circle 11, the second guide ring 12 to realize sealing and support with the piston rod portion of first-stage cylinder 2, the tail end outer rim of cylinder barrel 1 with
Cylinder bottom 6 is threadedly coupled and realizes sealing by the first O-ring 7.
Preferably, the first-stage cylinder 2 include level-one cylinder barrel 2.1, first-stage cylinder guide sleeve 2.2, first-stage cylinder sealing ring 2.3,
First-stage cylinder screw thread baffle ring 2.4, bleed screw 2.5 and oil fill plug 2.6；The level-one cylinder barrel 2.1 is cylinder-like structure, level-one
Cylinder guide sleeve 2.2 is flange disk-like structure, and first-stage cylinder screw thread baffle ring 2.4 is annular structure, in the head end of level-one cylinder barrel 2.1
Wall is threadedly coupled with the outer rim of first-stage cylinder guide sleeve 2.2 and passes through the sealing of first-stage cylinder sealing ring 2.3, first-stage cylinder guide sleeve 2.2
Cross section is opened along axial direction there are two through-hole, and installs 2.5 He of bleed screw respectively close to one end of flange in two through-holes
Oil fill plug 2.6, the inner wall of first-stage cylinder guide sleeve 2.2 is axial to be inwardly sequentially installed with the second dustband by described flange one end
15, the 4th Glais ring 16, the 4th guide ring 17 simultaneously realize sealing and support with the piston rod portion of secondary cylinder 3；Level-one cylinder barrel
The outer rim of 2.1 tail ends is equipped with the first Glais ring 8, the first guide ring 9 and realizes sealing and support with 1 inner wall of cylinder barrel；First-stage cylinder
The inside of 2.1 tail end of cylinder and the outer rim of first-stage cylinder screw thread baffle ring 2.4 are connected through a screw thread fastening, and the piston rod of first-stage cylinder 2 leans on
The part of nearly piston is radially provided with multiple through-holes.
Preferably, the secondary cylinder 3 include second level cylinder barrel 3.1, secondary cylinder guide sleeve 3.2, secondary cylinder sealing ring 3.3,
Secondary cylinder piston body 3.4, plug-in one-way valve 3.5 and oil guide pipe 3.6, the second level cylinder barrel 3.1 are cylinder-like structure, second level
Cylinder guide sleeve 3.2 is flange disk-like structure, and secondary cylinder piston body 3.4 is cylindrical-shaped structure and is provided with annular groove at one end；Two
The head end inner wall of grade cylinder barrel 3.1 is threadedly coupled with the outer rim of secondary cylinder guide sleeve 3.2 and to pass through secondary cylinder sealing ring 3.3 close
Envelope, the inner wall of secondary cylinder guide sleeve 3.2 are axially inwardly sequentially installed with third dustband 20 by flange end, the 6th Glais ring 21,
6th guide ring 22 simultaneously realizes sealing and support with the piston rod portion of three-level cylinder 4, and the tail end of second level cylinder barrel 3.1 is provided with 4-8
The radial through-hole of a connection 3 rodless cavity of secondary cylinder and 4 rod chamber of three-level cylinder, the outer rim and secondary cylinder of 3.1 tail end of second level cylinder barrel
The annular groove inner wall of piston body 3.4 is connected through a screw thread fastening, and secondary cylinder piston body 3.4 is provided with blind along longitudinal center line
Hole, one end of the oil guide pipe 3.6 is protruded into the blind hole and is welded with secondary cylinder piston body 3.4 and fastens, from secondary cylinder piston body
The 3.4 annular groove bottom, which is set out, opens up ladder hole along axial direction, and installation plug-in is unidirectional in the ladder hole
Valve 3.5 is also provided with the radial hole of connection first-stage cylinder 2 rod chamber and oil guide pipe 3.6, second level the cylinder piston in secondary cylinder piston body 3.4
The outer rim of body 3.4 along the two sides of the radial hole be separately installed with third Glais ring 13, third guide ring 14 and in first-stage cylinder 2
Wall realizes sealing and support, so that the oil liquid of the rodless cavity of the secondary cylinder 3 flows into three-level cylinder 4 by plug-in one-way valve 3.5
Rodless cavity, reversed oil liquid can not circulate, and first-stage cylinder 2 is in the radial through-hole and secondary cylinder piston body 3.4 of piston portion
Radial hole connection.
Preferably, the outer rim of the three-level cylinder 4 is ladder shaft-like structure, and inside is provided with stepped hole, three-level along axial line
The head end of the piston rod portion of cylinder 4 is threadedly coupled with cylinder head 5 and is sealed by the second O-ring 23, the piston rod portion of three-level cylinder 4
Tail end be radially provided with 4-8 through-hole close to piston region, the outer rim of the piston portion of three-level cylinder 4 installs the 5th Glais ring
18, the 5th guide ring 19 and sealing and support are realized with the inner wall of secondary cylinder 3, the inner hole of the piston portion of three-level cylinder 4 is equipped with
7th Glais ring 25 and the 7th guide ring 26, the other end of the oil guide pipe 3.6 protrude into the inside of three-level cylinder 4 and by the 7th lattice
Lay circle 25 and the 7th guide ring 26 are realized sealing with three-level cylinder 4 and are supported.
Preferably, the center of the axial described two through-holes of the first-stage cylinder guide sleeve 2.2 and first-stage cylinder guide sleeve 2.2
Center of circle three point on a straight line, 2.5 installation site of bleed screw are higher than 2.6 position of oil fill plug.
Preferably, the rodless cavity oil being connected to the rodless cavity of the rodless cavity of first-stage cylinder 2, secondary cylinder 3 is provided on the cylinder bottom 6
Mouthful A is provided with the rodless cavity hydraulic fluid port B being connected to the stepped hole, the oil guide pipe 3.6 in three-level cylinder 4 on cylinder head 5.
Preferably, the first lubricating cup 24 that promising bearing realizes lubrication is installed on the cylinder bottom 6.
Preferably, the second lubricating cup 27 that promising bearing realizes lubrication is installed on the cylinder head 5.
Preferably, the piston rod of first-stage cylinder 2 is radially provided with 4-8 through-hole close to the part of piston.
Three beneficial effects
The present invention can significantly improve the flexible speed of heavy duty multistage hydraulic cylinder by the matched design between Multi-stage cylinder
The grade impact frequency is changed in degree, reduction, solves that the processing and manufacturing of existing composite telescopic hydraulic cylinder is difficult, can not assemble, can not be oil-filled in advance
The problem of；And the synchronous error generated in hydraulic cylinder reciprocating motion can be eliminated, and fabricate simple, easy installation and tie up
Shield.
Detailed description of the invention
Fig. 1 is the overall structure cross-sectional view of hydraulic cylinder of the invention；
Fig. 2 is the structural schematic diagram of first-stage cylinder in hydraulic cylinder of the invention；
Fig. 3 is the structural schematic diagram of secondary cylinder in hydraulic cylinder of the invention；
Fig. 4 is the structural schematic diagram of three-level cylinder in hydraulic cylinder of the invention.
Wherein, 1- cylinder barrel, 2- first-stage cylinder, 2.1- level-one cylinder barrel, 2.2- first-stage cylinder guide sleeve, the sealing of 2.3- first-stage cylinder
Circle, 2.4- first-stage cylinder screw thread baffle ring, 2.5- bleed screw, 2.6- oil fill plug；3- secondary cylinder, 3.1- second level cylinder barrel, 3.2-
Secondary cylinder guide sleeve, 3.3- secondary cylinder sealing ring, 3.4- secondary cylinder piston body, 3.5- plug-in one-way valve, 3.6- oil guide pipe；4-
Three-level cylinder, 5- cylinder head, 6- cylinder bottom；The first O-ring of 7-, the first Glais ring of 8-, the first guide ring of 9-, the first dustband of 10-, 11-
Second Glais ring, the second guide ring of 12-, 13- third Glais ring, 14- third guide ring, the second dustband of 15-, the 4th lattice of 16-
The 4th guide ring of Lai Quan, 17-, the 5th Glais ring of 18-, the 5th guide ring of 19-, 20- third dustband, the 6th Glais ring of 21-,
The 6th guide ring of 22-, the second O-ring of 23-, the first lubricating cup of 24-, the 7th Glais ring of 25-, the 7th guide ring of 26-, the second oil of 27-
Cup.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
As shown in Figure 1, it includes cylinder barrel 1, one that the present invention, which provides one kind to be suitable for heavy duty multistage composite telescopic hydraulic cylinder,
Grade cylinder 2, secondary cylinder 3, three-level cylinder 4, cylinder head 5, cylinder bottom 6 and different size O-ring, Glais ring, guide ring, dustband and oil
Cup, in which:
As shown in Figure 1, the cylinder barrel 1, first-stage cylinder 2, secondary cylinder 3 with 4 ecto-entad of three-level cylinder is successively nested forms, cylinder barrel
1 is cylinder-like structure, and head end inner wall is sequentially installed with the first dustband 10 along axial ecto-entad, the second Glais ring 11, the
Two guide rings 12 simultaneously realize sealing and support with the piston rod portion of first-stage cylinder 2, and the tail end outer rim and 6 screw thread of cylinder bottom of cylinder barrel 1 connect
It connects and passes through the first O-ring 7 and realize sealing；
As shown in Figure 1 and Figure 2, the first-stage cylinder 2 includes level-one cylinder barrel 2.1, first-stage cylinder guide sleeve 2.2, first-stage cylinder sealing
Circle 2.3, first-stage cylinder screw thread baffle ring 2.4, bleed screw 2.5 and oil fill plug 2.6；The level-one cylinder barrel 2.1 is cylindric knot
Structure, first-stage cylinder guide sleeve 2.2 are flange disk-like structure, and first-stage cylinder screw thread baffle ring 2.4 is annular structure, level-one cylinder barrel 2.1
Head end inner wall be threadedly coupled with the outer rim of first-stage cylinder guide sleeve 2.2 and pass through first-stage cylinder sealing ring 2.3 sealing, first-stage cylinder guiding
The cross section of set 2.2 is opened along axial direction there are two through-hole, and is that flange disk-like structure first-stage cylinder is oriented to close to flange in two through-holes
One end of flange in set 2.2 is installed by the bleed screw 2.5 and oil fill plug 2.6, the inner wall of first-stage cylinder guide sleeve 2.2 respectively
It is axial that second dustband 15 is inwardly sequentially installed with by described flange one end, the 4th Glais ring 16, the 4th guide ring 17 and with two
The piston rod portion of grade cylinder 3 realizes sealing and support；The outer rim of 2.1 tail end of level-one cylinder barrel is equipped with the first Glais ring 8, first
Guide ring 9 simultaneously realizes sealing and support with 1 inner wall of cylinder barrel；The inside of 2.1 tail end of level-one cylinder barrel and first-stage cylinder screw thread baffle ring 2.4
Outer rim be connected through a screw thread fastening, the piston rod of first-stage cylinder 2 is radially provided with 4-8 through-hole close to the part of piston；
As shown in Figure 1, Figure 3, the secondary cylinder 3 is again close including second level cylinder barrel 3.1, secondary cylinder guide sleeve 3.2, secondary cylinder
Seal 3.3, secondary cylinder piston body 3.4, plug-in one-way valve 3.5 and oil guide pipe 3.6, the second level cylinder barrel 3.1 are cylindrical shape
Structure, secondary cylinder guide sleeve 3.2 are flange disk-like structure, and secondary cylinder piston body 3.4 is cylindrical-shaped structure and is provided with ring at one end
Connected in star；The head end inner wall of second level cylinder barrel 3.1 is threadedly coupled with the outer rim of secondary cylinder guide sleeve 3.2 and is sealed by secondary cylinder
3.3 sealing of circle, the inner wall of secondary cylinder guide sleeve 3.2 are axially inwardly sequentially installed with third dustband 20, the 6th lattice by flange end
Lay circle 21, the 6th guide ring 22 simultaneously realize sealing and support, the tail end of second level cylinder barrel 3.1 with the piston rod portion of three-level cylinder 4
Be provided with 4-8 connection 3 rodless cavity of secondary cylinder and 4 rod chamber of three-level cylinder radial through-hole, the outer rim of 3.1 tail end of second level cylinder barrel and
The annular groove inner wall of secondary cylinder piston body 3.4 is connected through a screw thread fastening, and secondary cylinder piston body 3.4 is along longitudinal center line
It is provided with blind hole, one end of the oil guide pipe 3.6 is protruded into the blind hole and welded with secondary cylinder piston body 3.4 and fastens, from secondary cylinder
The annular groove bottom of piston body 3.4, which is set out, opens up ladder hole along axial direction, and inserting is installed in the ladder hole
Formula check valve 3.5 is also provided with the radial hole of connection first-stage cylinder 2 rod chamber and oil guide pipe 3.6, second level in secondary cylinder piston body 3.4
The outer rim of the cylinder piston body 3.4 is separately installed with third Glais ring 13, third guide ring 14 and with one along the two sides of the radial hole
Grade 2 inner wall of cylinder realizes sealing and support, so that the oil liquid of the rodless cavity of the secondary cylinder 3 is flowed by plug-in one-way valve 3.5
The rodless cavity of three-level cylinder 4, reversed oil liquid can not circulate, radial through-hole and secondary cylinder piston body of the first-stage cylinder 2 close to piston portion
Radial hole in 3.4 is linked up；
As Figure 1 and Figure 4, the outer rim of the three-level cylinder 4 is ladder shaft-like structure, and inside is provided with ladder along axial line
Hole, the head end of the piston rod portion of three-level cylinder 4 are threadedly coupled with cylinder head 5 and are sealed by the second O-ring 23, the work of three-level cylinder 4
The tail end of rod portion is radially provided with 4-8 through-hole, the outer rim installation the 5th of the piston portion of three-level cylinder 4 close to piston region
Glais ring 18, the 5th guide ring 19 simultaneously realize sealing and support, the inner hole of the piston portion of three-level cylinder 4 with the inner wall of secondary cylinder 3
7th Glais ring 25 and the 7th guide ring 26 are installed, the other end of the oil guide pipe 3.6 protrudes into the inside of three-level cylinder 4 and passes through
7th Glais ring 25 and the 7th guide ring 26 are realized sealing with three-level cylinder 4 and are supported；
The center of the axial described two through-holes of the first-stage cylinder guide sleeve 2.2 and the center of circle three of first-stage cylinder guide sleeve 2.2
Point is conllinear, and 2.5 installation site of bleed screw is higher than 2.6 position of oil fill plug；
The rodless cavity hydraulic fluid port A being connected to the rodless cavity of the rodless cavity of first-stage cylinder 2, secondary cylinder 3, cylinder are provided on the cylinder bottom 6
The rodless cavity hydraulic fluid port B being connected to the stepped hole, the oil guide pipe 3.6 in three-level cylinder 4 is provided on first 5；
The first lubricating cup 24 that promising bearing realizes lubrication is installed on the cylinder bottom 6, promising bearing is installed on cylinder head 5 and realizes profit
The second sliding lubricating cup 27.
Heavy duty of the invention is as follows with the course of work of multistage composite telescopic hydraulic cylinder: before use, opening exhaust spiral shell
Plug 2.5 and oil fill plug 2.6 inject hydraulic oil, secondary cylinder 3 to the rod chamber of secondary cylinder 3 from the hole of installation oil fill plug 2.6
Rod chamber in air pass through installation bleed screw 2.5 hole at be discharged, the rod chamber of secondary cylinder 3 pacifies again after filling hydraulic oil
Dress tightens bleed screw 2.5 and oil fill plug 2.6；
When hydraulic cylinder needs overhanging, high pressure oil is squeezed into from rodless cavity hydraulic fluid port A to the rodless cavity of first-stage cylinder 2, high pressure oil drives
Dynamic first-stage cylinder 2 is stretched out first, while the oil liquid of 2 rod chamber of first-stage cylinder is logical close to the radial direction of piston portion followed by first-stage cylinder 2
Hole, the radial hole of secondary cylinder piston body 3.4, oil guide pipe 3.6, then flowed out by the rodless cavity hydraulic fluid port B on cylinder head 5；Secondary cylinder 3 has
The rodless cavity of rod cavity and three-level cylinder 4 forms choke-out cavity, and after first-stage cylinder 2 is stretched out in place, high pressure oil drives secondary cylinder 3 to overhanging again
Out, the oil liquid at this time in 3 rod chamber of secondary cylinder enters the rodless cavity of three-level cylinder 4 by the radial through-hole on second level cylinder barrel 3.1,
Push secondary cylinder 3 with three-level cylinder 4 simultaneously, it is synchronous protruding, therefore hydraulic cylinder can be significantly improved and stretch out speed, while three-level
The oil liquid of 4 rod chamber of cylinder flows through the radial hole on the piston rod of three-level cylinder 4, the axial hole in three-level cylinder 4, then by cylinder head 5
Rodless cavity hydraulic fluid port B outflow；And since secondary cylinder 3 and three-level cylinder 4 move simultaneously, is simultaneously stopped, there is no change grade to ask
Topic, significantly reduces the shock absorbing frequency；
When hydraulic cylinder needs to retract, high pressure oil, while three-level are squeezed into from rod chamber hydraulic fluid port B to the rod chamber of three-level cylinder 4
The oil liquid of 4 rodless cavity of cylinder enters the rod chamber of secondary cylinder 3 by the radial through-hole on second level cylinder barrel 3.1, drives 3 He of secondary cylinder
Three-level cylinder 4 is synchronous simultaneously to be retracted, after secondary cylinder 3 and three-level cylinder 4 retract in place, high-voltage oil liquid pass sequentially through again oil guide pipe 3.6,
The radial hole of secondary cylinder piston body 3.4, first-stage cylinder 2 close to piston portion radial through-hole, into the rodless cavity of first-stage cylinder 2, together
When 2 rodless cavity of first-stage cylinder oil liquid pass through the rod chamber hydraulic fluid port A outflow on cylinder bottom 6；
Realize that the exhaust of above-mentioned choke-out cavity is oil-filled by bleed screw 2.5 and oil fill plug 2.6, it is repeatedly past in hydraulic cylinder
In multiple motion process, when the rodless cavity of three-level cylinder 4 and the rod chamber of secondary cylinder 3 are formed by the oil liquid leakage in choke-out cavity
When, the plug-in one-way valve 3.5 installed on secondary cylinder piston body 3.4 automatically opens, and the choke-out cavity of Xiang Shangshu supplements oil liquid, into
And it can guarantee the precision that secondary cylinder 3 and three-level cylinder 4 move synchronously.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of heavy duty multistage composite telescopic hydraulic cylinder, which is characterized in that including cylinder barrel (1), first-stage cylinder (2), secondary cylinder
(3), three-level cylinder (4), cylinder head (5), cylinder bottom (6)；The cylinder barrel (1), first-stage cylinder (2), secondary cylinder (3) and three-level cylinder (4) are by outer
Inwardly successively nesting forms；The cylinder barrel (1) is cylinder-like structure, and the piston rod portion realization of head end and first-stage cylinder (2) is close
Envelope and support, the tail end outer rim of cylinder barrel (1) connect and seal with cylinder bottom (6)；The head end and cylinder of the piston rod portion of three-level cylinder (4)
Head (5) is connected and is sealed.
2. heavy duty as described in claim 1 multistage composite telescopic hydraulic cylinder, which is characterized in that the head of the cylinder barrel (1)
End inner wall is sequentially installed with the first dustband (10) along axial ecto-entad, the second Glais ring (11), the second guide ring (12) from
And sealing and support are realized with the piston rod portion of first-stage cylinder (2), the tail end outer rim of cylinder barrel (1) is threadedly coupled simultaneously with cylinder bottom (6)
It is realized and is sealed by the first O-ring (7).
3. heavy duty as claimed in claim 2 multistage composite telescopic hydraulic cylinder, which is characterized in that first-stage cylinder (2) packet
Include level-one cylinder barrel (2.1), first-stage cylinder guide sleeve (2.2), first-stage cylinder sealing ring (2.3), first-stage cylinder screw thread baffle ring (2.4), row
Gas plug screw (2.5) and oil fill plug (2.6)；The level-one cylinder barrel (2.1) is cylinder-like structure, first-stage cylinder guide sleeve (2.2)
For flange disk-like structure, first-stage cylinder screw thread baffle ring (2.4) is annular structure, the head end inner wall and one of level-one cylinder barrel (2.1)
The outer rim of grade cylinder guide sleeve (2.2) is threadedly coupled and passes through first-stage cylinder sealing ring (2.3) sealing, first-stage cylinder guide sleeve (2.2)
Cross section is opened along axial direction there are two through-hole, and installs the bleed screw (2.5) respectively close to one end of flange in two through-holes
With oil fill plug (2.6), the inner wall of first-stage cylinder guide sleeve (2.2), which is axially inwardly sequentially installed with second by described flange one end, to be prevented
Konisphere (15), the 4th Glais ring (16), the 4th guide ring (17) simultaneously realize sealing and branch with the piston rod portion of secondary cylinder (3)
Support；The outer rim of level-one cylinder barrel (2.1) tail end be equipped with the first Glais ring (8), the first guide ring (9) and with cylinder barrel (1) inner wall
Realize sealing and support；The inside of level-one cylinder barrel (2.1) tail end and the outer rim of first-stage cylinder screw thread baffle ring (2.4) are connected by screw thread
Fastening is connect, the piston rod of first-stage cylinder (2) is radially provided with multiple through-holes close to the part of piston.
4. heavy duty as claimed in claim 3 multistage composite telescopic hydraulic cylinder, which is characterized in that secondary cylinder (3) packet
Include second level cylinder barrel (3.1), secondary cylinder guide sleeve (3.2), secondary cylinder sealing ring (3.3), secondary cylinder piston body (3.4), inserting
Formula check valve (3.5) and oil guide pipe (3.6), the second level cylinder barrel (3.1) are cylinder-like structure, secondary cylinder guide sleeve (3.2)
For flange disk-like structure, secondary cylinder piston body (3.4) is cylindrical-shaped structure and is provided with annular groove at one end；Second level cylinder barrel
(3.1) head end inner wall is threadedly coupled with the outer rim of secondary cylinder guide sleeve (3.2) and passes through secondary cylinder sealing ring (3.3) sealing,
The inner wall of secondary cylinder guide sleeve (3.2) is axially inwardly sequentially installed with third dustband (20), the 6th Glais ring by flange end
(21), the 6th guide ring (22) and with the piston rod portion of three-level cylinder (4) realize sealing and support, second level cylinder barrel (3.1)
Tail end is provided with the radial through-hole of 4-8 connection secondary cylinder (3) rodless cavity and three-level cylinder (4) rod chamber, second level cylinder barrel (3.1) tail
The outer rim at end and the annular groove inner wall of secondary cylinder piston body (3.4) are connected through a screw thread fastening, secondary cylinder piston body
(3.4) be provided with blind hole along longitudinal center line, one end of the oil guide pipe (3.6) protrude into the blind hole and with secondary cylinder piston body
(3.4) welding fastening, opens up ladder hole along axial direction from the annular groove bottom of secondary cylinder piston body (3.4), and
Plug-in one-way valve (3.5) are installed in the ladder hole, connection first-stage cylinder (2) is also provided in secondary cylinder piston body (3.4)
The outer rim of the radial hole of rod chamber and oil guide pipe (3.6), secondary cylinder piston body (3.4) is installed respectively along the two sides of the radial hole
There are third Glais ring (13), third guide ring (14) and realize sealing and support with first-stage cylinder (2) inner wall, thus the secondary cylinder
(3) oil liquid of rodless cavity flows into the rodless cavity of three-level cylinder (4) by plug-in one-way valve (3.5), and reversed oil liquid can not circulate,
First-stage cylinder (2) is connected to close to the radial through-hole of piston portion with the radial hole in secondary cylinder piston body (3.4).
5. heavy duty as claimed in claim 4 multistage composite telescopic hydraulic cylinder, which is characterized in that the three-level cylinder (4)
Outer rim is ladder shaft-like structure, and inside is provided with stepped hole, the head end and cylinder head of the piston rod portion of three-level cylinder (4) along axial line
(5) it is threadedly coupled and is sealed by the second O-ring (23), the tail end of the piston rod portion of three-level cylinder (4) is close to piston region edge
Radial direction is provided with 4-8 through-hole, and the outer rim of the piston portion of three-level cylinder (4) installs the 5th Glais ring (18), the 5th guide ring (19)
And sealing and support are realized with the inner wall of secondary cylinder (3), the inner hole of the piston portion of three-level cylinder (4) is equipped with the 7th Glais ring
(25) it protrudes into the inside of three-level cylinder (4) with the 7th guide ring (26), the other end of the oil guide pipe (3.6) and by the 7th lattice Lay
It encloses (25) and the 7th guide ring (26) and three-level cylinder (4) realizes sealing and support.
6. heavy duty as claimed in claim 5 multistage composite telescopic hydraulic cylinder, which is characterized in that the first-stage cylinder guide sleeve
(2.2) center of circle three point on a straight line at the center and first-stage cylinder guide sleeve (2.2) of axial described two through-holes, bleed screw (2.5)
Installation site is higher than oil fill plug (2.6) position.
7. heavy duty as claimed in claim 6 multistage composite telescopic hydraulic cylinder, which is characterized in that opened on the cylinder bottom (6)
There is the rodless cavity hydraulic fluid port A being connected to the rodless cavity of the rodless cavity of first-stage cylinder (2), secondary cylinder (3), is provided on cylinder head (5) and three-level
The rodless cavity hydraulic fluid port B of the stepped hole, oil guide pipe (3.6) connection in cylinder (4).
8. heavy duty as described in claim 1 multistage composite telescopic hydraulic cylinder, which is characterized in that pacify on the cylinder bottom (6)
Equipped with the first lubricating cup (24) for realizing lubrication for bearing.
9. heavy duty as described in claim 1 multistage composite telescopic hydraulic cylinder, which is characterized in that pacify on the cylinder head (5)
Equipped with the second lubricating cup (27) for realizing lubrication for bearing.
10. heavy duty as claimed in claim 3 multistage composite telescopic hydraulic cylinder, which is characterized in that the piston of first-stage cylinder (2)
Bar is radially provided with 4-8 through-hole close to the part of piston.
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| CN201910750372.9A CN110410381B (en) | 2019-08-14 | 2019-08-14 | Multi-stage composite telescopic hydraulic cylinder for heavy load |
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| CN201910750372.9A CN110410381B (en) | 2019-08-14 | 2019-08-14 | Multi-stage composite telescopic hydraulic cylinder for heavy load |
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| CN110410381B CN110410381B (en) | 2021-02-09 |
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| 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 |
| CN113175460A (en) * | 2021-04-23 | 2021-07-27 | 中国人民解放军国防科技大学 | Hydraulic cylinder with variable piston section size |
| CN113550957A (en) * | 2020-04-26 | 2021-10-26 | 北京机械设备研究所 | Two-stage synchronous hydraulic cylinder |
| WO2023196099A1 (en) | 2022-04-06 | 2023-10-12 | Caterpillar Inc. | Actuator for machine |
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| CN110410381B (en) | 2021-02-09 |
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