CN108443263A - A kind of hydraulic cylinder - Google Patents
A kind of hydraulic cylinder Download PDFInfo
- Publication number
- CN108443263A CN108443263A CN201810637408.8A CN201810637408A CN108443263A CN 108443263 A CN108443263 A CN 108443263A CN 201810637408 A CN201810637408 A CN 201810637408A CN 108443263 A CN108443263 A CN 108443263A
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- China
- Prior art keywords
- piston rod
- cylinder body
- interior bar
- hydraulic
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- 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
- F15B15/221—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke for accelerating the stroke, e.g. by area increase
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of hydraulic cylinders, including cylinder body, interior bar and piston rod；Hydraulic oil with first pressure is inputted into quick chamber through rapid liquid inlet pipe and express passway, to drive piston rod needing quickly to stretch out in the displacement range quickly stretched out；The pressurized channel of hydraulic oil with second pressure is inputted into pressurizing chamber with pressurization inlet tube, quickly to increase the thrust output of piston rod, and piston rod is made to stretch out at a slow speed, when piston rod i.e. will be fully extended, spool is moved to piston rod and offsets with the inside bottom wall of cylinder body, spool overcomes the elastic force of top spring to move up and open pressure relief vent under the drag effect of the inside bottom wall of cylinder body, the hydraulic oil with second pressure in pressurizing chamber is set to flow into pressure-releasing cavity through adapter cavity and pressure relief vent, with the fast automatic thrust reduced to piston rod, save electrical and hydraulic system the release time, when applied to press machine, ram efficiency can be improved, simplify the structure of press machine and improves corresponding transmission accuracy.
Description
Technical field
The present invention relates to hydraulic transmission technology field, more particularly to a kind of hydraulic cylinder.
Background technology
Hydraulic cylinder is the executive component in Hydraulic Power Transmission System, it is the energy converting means for hydraulic energy being converted into mechanical energy
It sets.Have the characteristics that simple in structure, reliable operation, when realizing straight reciprocating motion, deceleration device can be removed from, and do not have with it
There are drive gap, stable movement, and high transmission accuracy, therefore is used widely in the hydraulic system of various machineries.
But existing hydraulic cylinder is influenced by the slower factor of the switching of output speed value and thrust magnitude, use scope by
Limitation has been arrived, for example, for press machine, it is required that during open mold, upper mold can have been driven in vertical difference
Regional extent provides different speed and thrust for upper mold, and existing hydraulic cylinder by output speed value and thrust magnitude switching compared with
Slow factor influences, and needs longer time to realize the requirement, has seriously affected ram efficiency（It is only capable of realizing within general one minute
Open mold ten times or so）.
Thus, existing press machine mainly uses motor-driven mode, i.e., is moved by motor drive flywheel, and lead to
Clutch is crossed, transmission gear drives toggle that sliding block is made to move up and down, and then drives upper mold lifting, so that upper mold is under
The punch forming to sheet metal is realized in mould cooperation.But using motor-driven mode, flywheel, deceleration device etc. need to be used
Mechanism can make complicatedization of press machine, in addition, this kind of drive that there are drive gaps is relatively large, movement it is steady
The relatively low problem of property, corresponding transmission accuracy and forming quality of products are relatively low.
Invention content
The main object of the present invention is to propose a kind of hydraulic cylinder, it is intended to improve the switching of the output speed and thrust of hydraulic cylinder
Efficiency to improve working efficiency, and improves application range.
To achieve the above object, the present invention proposes a kind of hydraulic cylinder, including：
Cylinder body, the hollow formation accommodation space of cylinder interior；
Interior bar, the interior bar are connected with cylinder body, and accommodation space is stretched out on the top of interior bar, and is equipped at interior bar and the mating surface of cylinder body
First sealing structure；And
Piston rod, the piston rod define open-topped cavity, and piston rod movable set is in interior bar and can be along interior bar axial direction
It is mobile, second seals structure is housed, the lower end of interior bar 2 is equipped with third sealing structure with will be empty at the mating surface of piston rod and interior bar
Chamber is separated into backhaul chamber and quick chamber up and down, and the periphery wall of piston rod is equipped with the 4th sealing structure with will be between piston rod and cylinder body
Clearance space be separated into pressurizing chamber and pressure-releasing cavity up and down, cylinder body, and the cooperation of cylinder body and piston rod are stretched out in the lower part of piston rod
The 5th sealing structure is equipped at face, the part of piston rod stretching cylinder body, which offers, leads to the express passway of quick chamber to connect quickly
Inlet tube, interior bar, which is located at the part outside cylinder body and offers, leads to the return pass of backhaul chamber to connect backhaul inlet tube, outside cylinder body
Wall, which offers, leads to the discharge channel of pressure-releasing cavity to connect release outlet tube, cylinder body correspond to pressurizing chamber position offer lead to plus
Press the pressurization passageway of chamber to connect pressurization inlet tube, the piston rod is further opened with the adapter cavity for leading to pressurizing chamber and led to
The pressure relief vent of chamber and pressure-releasing cavity is crossed, there is spool in adapter cavity and pushes up spring, the top of spool passes through the roof bullet for pushing up spring and adapter cavity
Property offset, lower part passes through and pressure relief vent and stretches into pressure-releasing cavity, and when piston rod is not fully extended, spool is under the elastic force effect of top spring
Pressure relief vent is closed, when piston rod i.e. will be fully extended, spool overcomes top spring under the drag effect of the inside bottom wall of cylinder body
Elastic force move up and open pressure relief vent.
Piston rod is set in the part that interior bar is located in the accommodation space of cylinder body by technical solution of the present invention, under interior bar
End installation third sealing structure is equipped with so that the cavity of piston rod is separated into backhaul chamber and quick chamber up and down in the outer wall of piston rod
4th sealing structure is added so that the clearance space between piston rod and cylinder body is separated into pressurizing chamber and pressure-releasing cavity up and down leading to
Press the adapter cavity and pressure relief vent of chamber and pressure-releasing cavity dress installation spool and top spring.The overhanging acting of piston rod need to be driven（Such as it strikes out
Type）During, servo-control system control oil pump is first passed through by the hydraulic oil with first pressure through rapid liquid inlet pipe and fast
Fast channel inputs quick chamber, to drive piston rod in the displacement range for needing quickly to stretch out（For example, from the position molded completely to
Displacement range when upper mold has just stretched the plank to be punched of lower die）Interior quick stretching（It should be noted that in this displacement range,
The resistance that piston rod is subject to without or it is smaller, be suitble to use higher stretching speed）；Then, servo-control system control oil pump
The pressurized channel of hydraulic oil with second pressure is inputted into pressurizing chamber with pressurization inlet tube, quickly to increase the output of piston rod
Thrust, and piston rod is made to stretch out at a slow speed（It should be noted that piston rod is by larger resistance in this stage, it is desirable that piston
Bar is overhanging at a slow speed and exports larger thrust, for example, upper mold just stretched the plank to be punched of lower die extremely will be complete by plank to be punched
The stage stretched entirely）；And then, when piston rod i.e. will be fully extended, spool is moved to the inside bottom with cylinder body with piston rod
Wall offsets, and spool overcomes the elastic force of top spring to move up and open pressure relief vent under the drag effect of the inside bottom wall of cylinder body,
The hydraulic oil with second pressure in pressurizing chamber is set to flow into pressure-releasing cavity through adapter cavity and pressure relief vent, with fast automatic reduction to piston
The thrust of bar saves electrical and hydraulic system the release time, until piston rod is fully extended（It should be noted that this stage
It is suitble to need to reduce thrust, prevents from overloading）.Obviously, the present invention can increase substantially output speed value and the switching effect of thrust magnitude
Ram efficiency can be improved when being applied to press machine in rate（It can realize within general one minute open mold about 40 times）.And punching press can be simplified
The structure of machine, and improve corresponding transmission accuracy.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of the present invention；
Fig. 2 is the sectional view of the present invention；
Fig. 3 is the enlarged detail of the part A of Fig. 2；
Fig. 4 is the schematic diagram of piston rod；
Fig. 5 is the schematic diagram of interior bar.
Specific implementation mode
Below in conjunction with attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts belong to
The scope of protection of the invention.
If it is to be appreciated that relating to directionality instruction in the embodiment of the present invention（Such as up, down, left, right, before and after, top,
Bottom, inside and outside, vertical, transverse direction, longitudinal direction, counterclockwise, clockwise, circumferentially, radially, axially ...）, then directionality instruction only use
In explanation in a certain particular pose（As shown in the picture）Under relative position relation, motion conditions etc. between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
If, should " first " or " the in addition, relate to the description of " first " or " second " etc. in the embodiment of the present invention
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, will be understood that this technical side when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not the present invention claims protection domain within.
The present invention proposes a kind of hydraulic cylinder.
In the embodiment of the present invention, as shown in Fig. 1 to 5, which includes cylinder body 1, interior bar 2 and piston rod 3.
Wherein, 1 inner hollow of cylinder body forms accommodation space.The interior bar 2 is connected with cylinder body 1, and the top of interior bar 2, which is stretched out, to hold
It receives space, and is equipped with the first sealing structure 21 at interior bar 2 and the mating surface of cylinder body 1.Piston rod 3 defines open-topped sky
Chamber, 3 movable set of piston rod is in interior bar 2 and can be axial along interior bar 2（Or up and down）It is mobile, the mating surface of piston rod 3 and interior bar 2
Place is equipped with second seals structure 31, and the lower end of interior bar 2 is equipped with third sealing structure 22 so that cavity is separated into backhaul chamber 32 up and down
With quick chamber 33, the periphery wall of piston rod 3 is equipped with the 4th sealing structure 34 with by the clearance space between piston rod 3 and cylinder body 1
It is separated into pressurizing chamber 35 and pressure-releasing cavity 36 up and down, cylinder body 1, and the mating surface of cylinder body 1 and piston rod 3 are stretched out in the lower part of piston rod 3
Place be equipped with the 5th sealing structure 111, piston rod 3 stretch out cylinder body 1 part offer lead to the express passway 37 of quick chamber 33 with
Connect rapid liquid inlet pipe（It is not shown）, interior bar 2 be located at the part outside cylinder body 1 offer lead to the return pass 23 of backhaul chamber 32 with
Connect backhaul inlet tube（It is not shown）, 1 outer wall of cylinder body offers the discharge channel for leading to pressure-releasing cavity 36（It is not shown）It is unloaded with connection
Extrude liquid pipe（It is not shown）, the position of the correspondence pressurizing chamber 35 of cylinder body 1, which offers, leads to the pressurization passageway 12 of pressurizing chamber 35 to connect
Pressurize inlet tube（It is not shown）, the piston rod 3 is further opened with the adapter cavity 38 for leading to pressurizing chamber 35 and leads to adapter cavity 38
With the pressure relief vent 381 of pressure-releasing cavity 36, there are spool 4 and top spring 5 in adapter cavity 38, the top of spool 4, which passes through, pushes up spring 5 and adapter cavity 38
Roof elasticity offset, lower part passes through and pressure relief vent 381 and stretches into pressure-releasing cavity 36, and when piston rod 3 is not fully extended, spool 4 exists
Pressure relief vent 381 is closed under the elastic force effect of top spring 5, when piston rod 3 i.e. will be fully extended, spool 4 is at the inside bottom of cylinder body 1
The elastic force of top spring 5 is overcome to move up and open pressure relief vent 381 under the drag effect of wall.
3 overhanging acting of piston rod need to be driven（Such as punch forming）During, first pass through servo-control system control oil
Pump is by the hydraulic oil with first pressure through rapid liquid inlet pipe（It is not shown）Quick chamber 33 is inputted with express passway, to drive piston
Bar 3 is in the displacement range for needing quickly to stretch out（For example, just having stretched the plate to be punched of lower die from the position molded completely to upper mold
（It is not shown）Displacement range when material）Interior quick stretching（It should be noted that in this displacement range, the resistance that piston rod 3 is subject to
Power without or it is smaller, be suitble to use higher stretching speed）；Then, servo-control system control oil pump will have second pressure
The pressurized inlet tube of hydraulic oil and pressurization passageway 12 input pressurizing chamber 35, quickly to increase the thrust output of piston rod 3, and make
Piston rod 3 stretches out at a slow speed（It should be noted that piston rod 3 is by larger resistance in this stage, it is desirable that piston rod 3 is at a slow speed
It is overhanging and export larger thrust, such as upper mold just stretched the plank to be punched of lower die and will extremely be completely stretched plank to be punched
Stage）；And then, when piston rod 3 i.e. will be fully extended, spool 4 is moved to the inside bottom wall with cylinder body 1 with piston rod 3
It offsets, spool 4 overcomes the elastic force of top spring 5 to move up and open pressure relief vent 381 under the drag effect of the inside bottom wall of cylinder body 1
It opens, makes the hydraulic oil in pressurizing chamber 35 with second pressure through adapter cavity 38 and the inflow pressure-releasing cavity 36 of pressure relief vent 381 and through release
Channel and release outlet tube flow back to fuel tank, with the fast automatic thrust reduced to piston rod 3, save electrical and hydraulic system unload
The time is pressed, until piston rod 3 is fully extended（It should be noted that this stage is suitble to need to reduce thrust, prevent from overloading）.It is aobvious
So, the present invention can increase substantially the switching efficiency of output speed value and thrust magnitude, and when being applied to press machine, punching press effect can be improved
Rate（It can realize within general one minute open mold about 40 times）.And the structure of press machine can be simplified and improve corresponding transmission accuracy.
And when needing to shrink piston rod 3, then it can control oil pump by the hydraulic oil with third pressure through return pass and backhaul inlet tube
Input backhaul chamber simultaneously pushes piston rod 3 to shrink, and the hydraulic oil of pressurizing chamber 35 and quick chamber 33 then flows back to fuel tank, until piston rod
3 shrink in place.
It should be noted that the arrival end of express passway 37 is equipped with the first connector 39 and is equipped with the first hydraulic valve（Do not scheme
Show）, for the entrance of the first hydraulic valve by rapid liquid inlet pipe connection oil pump, outlet connects fuel tank by oil pipe（It is not shown）,
The arrival end of return pass 23 is equipped with the second connector 24 and is equipped with the second hydraulic valve（It is not shown）, the entrance of the second hydraulic valve is logical
The backhaul inlet tube connection oil pump is crossed, outlet connects fuel tank by oil pipe（It is not shown）；The arrival end of pressurization passageway 12 is equipped with
Third connector 13 is simultaneously equipped with third hydraulic valve（It is not shown）, the entrance of the third liquid valve pressurization inlet tube logically（It is not shown）
Lead to oil pump, outlet connects fuel tank by oil pipe（It is not shown）, the first hydraulic valve, the second hydraulic valve and third hydraulic valve and servo
Control system is electrically connected, and can be by servo-control system switching direction, for example, during piston rod 3 stretches out, backhaul chamber
Hydraulic oil can only flow out and cannot flow into, pressurizing chamber 35 and quick chamber 33 are then only for hydraulic oil flows into and cannot flow out, in work
During stopper rod 3 is shunk, then on the contrary.
Specifically, cylinder body 1 includes shell 10 and guide sleeve 11, and the receiving that the shell 10 defines bottom-open is empty
Between, guide sleeve 11 is loaded at 10 open bottom of shell, and is placed on piston rod 3, the mating surface of the internal perisporium and piston rod 3 of guide sleeve 11
Place is set with preventing hydraulic oil from leaking outside at the periphery wall of guide sleeve 11 and the mating surface of cylinder body 1 equipped with the 5th sealing structure 111
There is the 6th sealing structure 112, to prevent hydraulic oil from leaking outside.Further, radial overhanging flange is arranged at the bottom of the shell 10
101, the flange 101 offers screw via, shell 10 to be fastened on pedestal 100 by screw, to be carried out to cylinder body 1
Positioning.
Specifically, the interior bar 2 is butted on the inside roof of cylinder body 1 in the big step shaft-like of the small hypomere of epimere, step surface,
Epimere stretches out shell 10 from the via for being opened in 1 roof of cylinder body, and the periphery wall that epimere stretches out the part of cylinder body 1 forms screw thread,
There is nut 6 to be rotatably connected in epimere and offset with the outside roof of cylinder body 1, interior bar 2 is fastened at cylinder body 1.
Specifically, the piston rod 3 includes main body 30 and body 301, and the main body 30 defines open-topped institute
Cavity is stated, the body 301 is loaded on top open part, and activity is placed on interior bar 2, the cooperation of the internal perisporium and interior bar 2 of body 301
The second seals structure 31 is housed, to seal, the periphery wall of the body 301 is filled with the mating surface of main body 30 at face
There is the 7th sealing structure 310, to seal.
Further, the position of the correspondence of the cylinder body 1 pressurizing chamber 35 offers the repairing hole 14 for leading to pressurizing chamber 35, repairing
Hole 14 passes through hydraulic valve 7 and oil pipe（It is not shown）With slippage pump（It is not shown）Connection, when quick chamber 33 is with first pressure
During hydraulic oil drives piston rod 3 to stretch out, the space of pressurizing chamber 35 will increase, and just need here through slippage pump through hydraulic pressure
Valve 7 and repairing pipe supplement hydraulic oil toward pressurizing chamber 35, so that the hydraulic oil in pressurizing chamber 35 remains full of pressurizing chamber 35, otherwise,
During the follow-up past input of pressurizing chamber 35 has the hydraulic oil of second pressure, it is also necessary to first with the hydraulic pressure with second pressure
Oil is full of the process of pressurizing chamber 35, and this can influence working efficiency.
Specifically, third sealing structure 22 includes fixed（It is preferred that being screwed on by screw-thread fit）Pullover in 2 lower end of interior bar
221 and sealing element 222, the sealing element 222 is loaded on the periphery wall of pullover 221.More specifically, sealing element includes at least one
The periphery wall of rubber ring, pullover 221 slots and installs the rubber ring.
Specifically, as shown in figure 4, the arrival end of express passway 37 is set to the periphery that piston rod 3 is located at the part outside cylinder body 1
Wall or bottom wall, and extend to and be connected to the cavity.
Specifically, as shown in figure 5, the arrival end of the return pass 23 is preferably opened in the roof of interior bar 2, outlet end is opened
It is connected to set on its side wall and with backhaul chamber 32.
Specifically, first sealing structure 21, the 4th sealing structure 34 of second seals structure 31, the 5th sealing structure
111, the 6th sealing structure 112, the 7th sealing structure 310 may each comprise at least one rubber ring（Such as one, two, three
It is a or more）, mounting means equally can be used fluting installation mode.
It should be noted that the first pressure, the second pressure and the third pressure can as needed depending on, example
Such as, second pressure is preferably greater than first pressure.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (10)
1. a kind of hydraulic cylinder, which is characterized in that including：
Cylinder body, the hollow formation accommodation space of cylinder interior；
Interior bar, the interior bar are connected with cylinder body, and accommodation space is stretched out on the top of interior bar, and is equipped at interior bar and the mating surface of cylinder body
First sealing structure；And
Piston rod, the piston rod define open-topped cavity, and piston rod movable set is in interior bar and can be along interior bar axial direction
It is mobile, second seals structure is housed, the lower end of interior bar 2 is equipped with third sealing structure with will be empty at the mating surface of piston rod and interior bar
Chamber is separated into backhaul chamber and quick chamber up and down, and the periphery wall of piston rod is equipped with the 4th sealing structure with will be between piston rod and cylinder body
Clearance space be separated into pressurizing chamber and pressure-releasing cavity up and down, cylinder body, and the cooperation of cylinder body and piston rod are stretched out in the lower part of piston rod
The 5th sealing structure is equipped at face, the part of piston rod stretching cylinder body, which offers, leads to the express passway of quick chamber to connect quickly
Inlet tube, interior bar, which is located at the part outside cylinder body and offers, leads to the return pass of backhaul chamber to connect backhaul inlet tube, outside cylinder body
Wall, which offers, leads to the discharge channel of pressure-releasing cavity to connect release outlet tube, cylinder body correspond to pressurizing chamber position offer lead to plus
Press the pressurization passageway of chamber to connect pressurization inlet tube, the piston rod is further opened with the adapter cavity for leading to pressurizing chamber and led to
The pressure relief vent of chamber and pressure-releasing cavity is crossed, there is spool in adapter cavity and pushes up spring, the top of spool passes through the roof bullet for pushing up spring and adapter cavity
Property offset, lower part passes through and pressure relief vent and stretches into pressure-releasing cavity, and when piston rod is not fully extended, spool is under the elastic force effect of top spring
Pressure relief vent is closed, when piston rod i.e. will be fully extended, spool overcomes top spring under the drag effect of the inside bottom wall of cylinder body
Elastic force move up and open pressure relief vent.
2. hydraulic cylinder as described in claim 1, it is characterised in that：The arrival end of express passway is equipped with the first connector and is equipped with
The entrance of first hydraulic valve, the first hydraulic valve connects oil pump by the rapid liquid inlet pipe, and outlet connects fuel tank by oil pipe, returns
The arrival end of Cheng Tongdao is equipped with the second connector and is equipped with the second hydraulic valve, and the entrance of the second hydraulic valve passes through the backhaul feed liquor
Pipe connects oil pump, and outlet connects fuel tank by oil pipe；The arrival end of pressurization passageway is equipped with third connector and is equipped with third hydraulic pressure
Valve, the pressurization inlet tube leads to oil pump logically for the entrance of third liquid valve, outlet by oil pipe connection fuel tank, the first hydraulic valve,
Second hydraulic valve and third hydraulic valve are electrically connected with servo-control system.
3. hydraulic cylinder as described in claim 1, it is characterised in that：Cylinder body includes shell and guide sleeve, and the shell defines
The accommodation space of bottom-open, guide sleeve is loaded at the open bottom of shell, and is placed on piston rod, the internal perisporium of guide sleeve and work
5th sealing structure is housed at the mating surface of stopper rod, the 6th sealing is equipped at the periphery wall of guide sleeve and the mating surface of cylinder body and is tied
Structure.
4. hydraulic cylinder as claimed in claim 3, it is characterised in that：Radial overhanging flange, the flange are arranged at the bottom of shell
Screw via is offered, shell is fastened on pedestal by screw.
5. hydraulic cylinder as described in claim 1, it is characterised in that：Interior bar is in the big step shaft-like of the small hypomere of epimere, step
Face is butted on the inside roof of cylinder body, and epimere stretches out shell from the via for being opened in cylinder body roof, and epimere stretches out the part of cylinder body
Periphery wall forms screw thread, has nut to be rotatably connected in epimere and offset with the outside roof of cylinder body.
6. hydraulic cylinder as described in claim 1, it is characterised in that：Piston rod includes main body and body, and the main body limits
There is the open-topped cavity, the body is loaded on top open part, and activity is placed on interior bar, the internal perisporium and interior bar of body
Mating surface at the second seals structure is housed, the periphery wall of body and the mating surface of main body are equipped with the 7th sealing structure.
7. hydraulic cylinder as described in claim 1, it is characterised in that：Third sealing structure includes being fixedly arranged on the pullover of interior bar lower end
And sealing element, the sealing element are loaded on the periphery wall of pullover, sealing element includes at least one rubber ring, and the periphery wall of pullover is opened
Slot simultaneously installs the rubber ring.
8. hydraulic cylinder as described in claim 1, it is characterised in that：The arrival end of express passway is located at set on piston rod outside cylinder body
Part periphery wall or bottom wall, and extend to and be connected to the cavity.
9. hydraulic cylinder as described in claim 1, it is characterised in that：The arrival end of return pass is opened in the roof of interior bar, goes out
Mouth end is opened in its side wall and is connected to backhaul chamber.
10. hydraulic cylinder as in one of claimed in any of claims 1 to 9, it is characterised in that：It opens the position that cylinder body corresponds to pressurizing chamber
Equipped with the repairing hole for leading to pressurizing chamber, repairing hole is connect by hydraulic valve and oil pipe with slippage pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637408.8A CN108443263B (en) | 2018-06-20 | 2018-06-20 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637408.8A CN108443263B (en) | 2018-06-20 | 2018-06-20 | Hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108443263A true CN108443263A (en) | 2018-08-24 |
| CN108443263B CN108443263B (en) | 2023-08-18 |
Family
ID=63206597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810637408.8A Active CN108443263B (en) | 2018-06-20 | 2018-06-20 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108443263B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013046A (en) * | 2020-07-31 | 2020-12-01 | 威伯科汽车控制系统（中国）有限公司 | Clutch control cylinder of commercial vehicle |
Citations (8)
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| CN208565130U (en) * | 2018-06-20 | 2019-03-01 | 东莞市得力仕机械科技有限公司 | A kind of hydraulic cylinder |
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| GB2077391A (en) * | 1980-06-06 | 1981-12-16 | Smick Pty Ltd | Piston rod coupling |
| CN101501335A (en) * | 2006-06-07 | 2009-08-05 | Nvb国际有限公司 | A piston-chamber combination |
| CN101135328A (en) * | 2007-10-23 | 2008-03-05 | 祁胜 | Combined type press hydraulic cylinder |
| CN101852224A (en) * | 2009-03-30 | 2010-10-06 | 中集车辆（集团）有限公司 | Hydraulic cylinder device |
| CN101985950A (en) * | 2010-12-06 | 2011-03-16 | 韶关液压件厂有限公司 | High-frequency automatic reversing hydraulic cylinder |
| CN103994119A (en) * | 2014-06-12 | 2014-08-20 | 苏州劳灵精密机械有限公司 | Hinging inner rod type double-acting cylinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013046A (en) * | 2020-07-31 | 2020-12-01 | 威伯科汽车控制系统（中国）有限公司 | Clutch control cylinder of commercial vehicle |
| CN112013046B (en) * | 2020-07-31 | 2022-03-15 | 采埃孚商用车系统(青岛)有限公司 | Clutch control cylinder of commercial vehicle |
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| Publication number | Publication date |
|---|---|
| CN108443263B (en) | 2023-08-18 |
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