CN107237855A - Piston unit and oil-pressure damper - Google Patents
Piston unit and oil-pressure damper Download PDFInfo
- Publication number
- CN107237855A CN107237855A CN201710512110.XA CN201710512110A CN107237855A CN 107237855 A CN107237855 A CN 107237855A CN 201710512110 A CN201710512110 A CN 201710512110A CN 107237855 A CN107237855 A CN 107237855A
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- Prior art keywords
- piston
- valve
- valve element
- valve pocket
- hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
Abstract
The present invention proposes a kind of piston unit, for in oil-pressure damper, the valve pocket moved downward can be oppressed by fluid above the piston only by setting, with the valve element that can be upwards moved by the fluid compressing of piston only lower section, and set can connect the piston only upper and lower fluid to unload oilhole on the surface that the valve element is engaged with the valve pocket, avoid the technical problem that cost is high caused by the piston only opposing sides is respectively mounted valve component respectively in the prior art and processing installation is complicated, performance simple in construction is stable, be conducive to improving operating efficiency.Present invention further propose that a kind of oil-pressure damper, foregoing piston unit is provided with, it is simple in construction and two-way off-load vibration damping can be realized.
Description
Technical field
The invention belongs to rail locomotive vehicle oil-pressure damper technical field, more particularly to a kind of piston unit and oil pressure
Shock absorber.
Background technology
Rail locomotive vehicle oil-pressure damper includes working cylinder and the piston unit being placed in working cylinder, the oil cylinder
In be filled with off-load fluid, referring to Fig. 1 and Fig. 2, the piston unit include piston only 11, the top of the piston only 11
One or more valve component is provided with, each valve component includes valve bonnet 12, valve element 13 and spring 14.The valve
Cover 12 and valve element 13 be cylindrical-shaped structure, the valve bonnet 12 is axially arranged through hole 121, and the valve element 13 is axially arranged blind
Hole 131, the outer surface of the valve bonnet 12 is threadedly coupled with the piston only 11, and the valve element 13 is sheathed on the valve bonnet 12
In through hole 121, the motion of 121 pairs of the through hole valve element 13 play the guiding role, and the outer surface of the valve element 13 leads to described
The internal surface gaps of hole 121 coordinate, so that closing oil path；Square off-load is provided with the bottom sidewall of the blind hole 131 of valve element 13
Mouthfuls 132, the top of valve element 13 is connected by spring 14 with the piston only 11 so that the valve element 13 can be moved up and down,
Oil sealing portion 15 is provided with the valve element, the spring 14 can oppress the upper surface of oil sealing portion 15 and the lower surface of valve bonnet 12
Fit with closing oil path, outlet is provided with the position corresponding with the valve element 13 on the bottom surface of the piston only 11
111；When the piston only 11 is moved upwards, the oil liquid pressure increase of the top of piston only 11, the valve element 13 is in fluid
Pressure under move down, the unloading port 132 is separated with the inner surface of 12 through hole of valve bonnet 121, on the piston only 11
Square fluid passes sequentially through the outlet 111 of blind hole 131, unloading port 132 and the piston only 11 of the valve element 13, from piston only
11 tops flow into the lower section of piston only 11, so as to complete unloading process, reach effectiveness in vibration suppression.In order that oil-pressure damper is with double
To off-load and effectiveness in vibration suppression, be further provided with valve component, the bottom of piston only 11 on the bottom of piston only 11
The valve component in portion and the valve component at the top of piston only 11 mutually deviate from and are staggered.
, can only be to the fortune in one direction of piston only from the foregoing, valve component in piston unit is check valve body
It is dynamic to realize off-load and vibration-damping function, in order to realize two-way off-load vibration damping, then must respectively it be set in the opposing sides of piston only
Valve component, required valve component is more, and cost is higher, and processing installation process is complicated.
Therefore, piston unit a kind of simple in construction and that two-way off-load vibration damping can be realized is designed, and applies the piston
The oil-pressure damper of unit, is very important to those skilled in the art.
The content of the invention
The present invention is directed to the baroque technical problem of oil-pressure damper of existing two-way off-load, proposes a kind of simple in construction
Piston unit, and the application piston unit oil-pressure damper, and the function of two-way off-load vibration damping can be realized.
In order to achieve the above object, the technical solution adopted by the present invention is：
Compared with prior art, advantages and positive effects of the present invention are：
1st, piston unit of the invention, the valve moved downward can be oppressed by setting by fluid above the piston only
Set, and can match by the valve element that fluid compressing is moved upwards below the piston only, and in the valve element and the valve pocket
Set can connect the piston only upper and lower fluid unload oilhole on the surface of conjunction, it is to avoid in the prior art respectively described
Piston only opposing sides is respectively mounted the technical problem that cost is high and processing installation is complicated caused by valve component, simple in construction
Performance is stable, is conducive to improving operating efficiency.
2nd, piston unit of the invention, the oilhole that unloads is arranged at the outer surface that the valve element is engaged with the valve pocket
On, as the valve pocket is along the piston only axial downward movement, or the valve element along the piston only axially upwards
Motion, the oilhole that unloads gradually is separated with the valve pocket, so that the fluid of the piston only upper and lower is gradually connected, kept away
Exempt from moment off-load caused by the increase of fluid circulation moment, improve the quality stability of inventive piston unit, and meet
Damping force and the requirement that unloading rate is linear or class is linear.
3rd, piston unit of the invention, second throttle orifice is arranged at the top of the valve element, and of the prior art
Throttle orifice is compared, not only easy to process, and matching somebody with somebody for the valve core outer surface and the through-hole inner surface is not interfered with during processing
Close precision.
4th, piston unit of the invention only needs to adjust the valve pocket sectional area and the ratio of spool sectional area in the design phase
The damping force that two-way off-load can be achieved in value is equal, with needing to debug the piston only opposing sides upper valve respectively in the prior art
The pretightning force of the spring of body component is compared, and packaging technology is greatly simplified, and is conducive to improving operating efficiency.
5th, piston unit of the invention, the valve element bottom is provided with outlet, one end of the outlet and the valve
Cavity between core and piston only is connected, and the other end of the outlet is connected with the blind hole, it is ensured that the work
The oil liquid pressure for filling in cavity between fluid and the valve element and piston only below body is balanced, and further increases work of the present invention
Fill in the quality stability of unit.
Brief description of the drawings
Fig. 1 is the structural representation of prior art oil-pressure damper piston unit；
Fig. 2 is A-A directions sectional view in Fig. 1；
Fig. 3 is the structural representation of inventive piston unit；
Fig. 4 is the top view of inventive piston unit.
Above in each figure：11st, piston only；111st, outlet；12nd, valve bonnet；121st, through hole；13rd, valve element；131st, blind hole；
132nd, unloading port；133rd, throttle orifice；14th, spring；15th, oil sealing portion；
21st, piston only；211st, outlet；22nd, valve pocket；221st, first shoulder；222nd, first through hole；23rd, valve element；231、
Unload oilhole；232nd, blind hole；233rd, the second shoulder；234th, the second throttle orifice；235th, outlet；24th, locking nut；241st, second leads to
Hole；25th, spring；26th, pad.
Embodiment
Below, the present invention is specifically described by exemplary embodiment.It should be appreciated, however, that not entering one
In the case of step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiment
In.
In the description of the invention, it is necessary to which explanation, axially refers to the axial direction of working cylinder and piston only, be also piston
The direction of body motion；Circumferentially refer to the circumferencial direction of working cylinder and piston only；Radially refer to working cylinder and piston only
Radial direction；The orientation or position relationship of the instruction such as term " top ", " bottom " " interior ", " outer ", " on ", " under ", "front", "rear" are base
In the position relationship shown in accompanying drawing 2 and accompanying drawing 3, it is for only for ease of the description present invention and simplifies description, rather than indicate or dark
Specific orientation must be had, with specific azimuth configuration and operation by showing the device or element of meaning, therefore it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying and be relative
Importance.
Referring to Fig. 3, Fig. 3 is the structural representation of inventive piston unit.As shown in figure 3, a kind of piston unit, is arranged at
On oil-pressure damper, fluid is filled with to reach in effectiveness in vibration suppression, the oil-pressure damper for closing or opening oil circuit；This hair
Bright piston unit includes piston only 21 and valve component, and the valve component is axially mounted on the piston only 21,
The valve component includes valve pocket and valve element, and the valve pocket 22 can be moved axially towards the bottom of piston only 21, described
The outer surface of valve pocket 22 is engaged with the piston only 21, and the precision coordinated at this meets the requirement of closing oil path, the valve
Valve element 23 is axially arranged with set 22, the valve element 23 can be moved away from the bottom of piston only 21 vertically, the valve element
23 coordinate with the gap of valve pocket 22, and the precision that gap coordinates at this meets the requirement of closing oil path；The valve element 23 is sheathed on
Be provided with negotiable fluid on the surface in the valve pocket 22 unload oilhole 231, the valve element 23 and the piston only 21
One end (i.e. bottom) for being engaged is axially arranged a blind hole 232, the blind hole 232 it is opening down, it is described to unload oilhole 231 and institute
State blind hole 232 to be connected, the piston only 21 position corresponding with the blind hole 232 is provided with first discharge port 211, institute
First discharge port 211 is stated with the lower section fluid of piston only 21 to be connected.
The piston unit of the present invention, by setting the valve pocket that can be moved downward by the top fluid compressing of piston only 21
22, and the valve element 23 that can be upwards moved by the lower section fluid compressing of piston only 21, and in the valve element and the valve pocket
Set can connect the upper and lower fluid of piston only 21 unload oilhole 231 on 22 surfaces being engaged, it is to avoid prior art
It is middle that cost is high caused by the opposing sides of piston only 21 is respectively mounted valve component respectively and complicated skill is installed in processing
Art problem, performance simple in construction is stable, is conducive to improving operating efficiency.
Further, the bottom of valve pocket 22 is further provided with first shoulder 221, the top surface of the first shoulder 221
It can be engaged to limit the valve pocket 22 motion upwards, the bottom of the valve element 23 and the piston sheet with the piston only 21
The bottom of body 21 is engaged to be moved downward with limiting the valve element 23.
Specifically, during initial position, the oil liquid pressure balance above and below the piston only 21, the blind hole 232
Connected by the first discharge port 211 with the fluid of the lower section of piston only 21, the valve pocket 22 and the phase of piston only 21
Coordinate to close the oil circuit of the top of piston only 21, the valve element 23 coordinates to close the piston sheet with the gap of valve pocket 22
The oil circuit of the top of body 21, the oilhole 231 that unloads fits to close the oil circuit of the top of piston only 21 with valve pocket 22.
Further, when the piston only 21 is moved upwards, the oil liquid pressure increase of the top of piston only 21,
The fluid of the top of piston only 21 is oppressed the valve pocket 22 and moved axially downwards, and the valve element 23 is in the piston only
Can not be moved downward in the presence of 21 bottoms, with moving downward for the valve pocket 22, it is described unload oilhole 231 gradually with the valve
The separation of set 22 is simultaneously connected with the fluid of the top of piston only 21, so that the fluid of the top of the piston only 21 passes through
The oilhole 231 that unloads flows into the blind hole 232, and flows into the lower section of piston only 21 by the first discharge port 211, makes
Oil liquid pressure above and below the piston only 21 balances each other, and reaches off-load and effectiveness in vibration suppression.
Further, when the piston only 21 is moved downward, the oil liquid pressure increase of the lower section of piston only 21,
The fluid of the lower section of piston only 21 is oppressed the valve element 23 and moved axially upward, and the valve pocket 22 is in the first shoulder
221 and piston only 21 coordinate in the presence of can not move upwards, with the valve element 23 upwards move, it is described to unload oilhole 231
Gradually separate and be connected with the fluid of the top of piston only 21 with the valve pocket 22, so that under the piston only 21
The fluid of side, which passes sequentially through the first discharge port 211, blind hole 232 and unloads oilhole 231, flows into the top of piston only 21, makes
Oil liquid pressure above and below the piston only 21 balances each other, and reaches off-load and effectiveness in vibration suppression.
It should be noted that in the prior art, needing to clamp the valve element 13 and the valve when processing the unloading port 132
12 outer surfaces being engaged are covered, inevitably the form and position tolerance to the valve bonnet 12 and the mating surface of valve element 13 is impacted,
And then influence the quality and precision of valve component and oil-pressure damper.
The piston unit of the present invention, the oilhole 231 that unloads is arranged at what the valve element 23 coordinated with the gap of valve pocket 22
Outer surface, need to only clamp the bottom of the valve element 23 when unloading oilhole 231 described in processing, not be the valve element 23 and institute at this
The mating surface of valve bonnet 23 is stated, and then does not interfere with the form and position tolerance of the valve element 23 and valve bonnet 22, has inventive piston unit
There are the quality and precision property of stabilization.
With continued reference to Fig. 3, as shown in figure 3, in order to realize different off-load and effectiveness in vibration suppression, the oilhole 231 that unloads can be set
Be set to one or more, when it is described unload oilhole 231 for it is multiple when, it is described many in order to improve stability in the fluid process of circulation
The individual oilhole 231 that unloads is uniformly distributed on the outer surface of valve element 23 along the valve element 23 is circumferential.Meanwhile, the oilhole 231 of unloading
Shape is not limited to one kind, as long as can be conducive to the fluid uniformly circulation.Preferably, described unload oilhole 231
It is radially arranged along the valve element 23, to increase the stability of the fluid process of circulation.
Further, unloading port 132 of the prior art is arranged at the side of the blind hole of valve element 13, the piston only
The fluid of 11 tops flows into the lower section of piston only 11 by the unloading port 132, and the fluid flows through the unloading port 132
When radial load inevitably is produced to the side wall of valve element 13 of the opposite side of unloading port 132, and then influence the valve element 13
Service life.
The piston unit of the present invention, the multiple oilhole 231 that unloads is uniformly distributed in the valve element 23 and the phase of valve pocket 22
On the outer surface of cooperation, the fluid of the either above or below of piston only 21 flows through described when unloading oilhole 231, the fluid pair
The radial load that the valve element 23 is produced is cancelled out each other, it is to avoid the local stress fatigue of the valve element 23, further increasing
The quality and service life of inventive piston unit.
With continued reference to Fig. 3, as shown in figure 3, it is described unload oilhole 231 and be arranged at the valve element 23 be engaged with the valve pocket 22
Outer surface on, as the valve pocket 22 is along the axial downward movement of piston only 21, or the valve element 23 is along the work
Plug body 21 is moved axially upward, and the oilhole 231 that unloads gradually is separated with the valve pocket 22, so that on the piston only 21
The fluid of lower section is gradually connected, it is to avoid moment off-load caused by the increase of fluid circulation moment, improves inventive piston
The quality stability of unit.
On the other hand, when the piston only 21, upwardly or downwardly moving displacement amount is larger, i.e., described piston only 21
When the increase of either above or below oil liquid pressure is more, the valve pocket 22 moves downward displacement or the valve element 23 is moved downward
Displacement is correspondingly than larger, so that the circulation area increase for unloading oilhole 231, the fluid amount flowed through at this increases, i.e.,
The effect of quick relief is reached, the piston unit of the present invention is met the requirement that damping force is directly proportional to unloading rate.
With continued reference to Fig. 3, as shown in figure 3, the valve pocket 22 is axially arranged first through hole 222, the valve element 23 is arranged
In the first through hole 222, the valve element 23 coordinates with the gap of first through hole 222, and the precision that gap coordinates at this expires
The requirement of sufficient closing oil path.
Further, the valve component includes locking nut 24, outer surface and the piston of the locking nut 24
Body 21 is threadedly coupled, and the locking nut 24 is axially arranged the second through hole 241, and the valve pocket 22 is sheathed on described second and led to
In hole 241, the inner surface of second through hole 241 coordinates with the outer surface gap of valve pocket 22, the precision that gap coordinates at this
Meet the requirement of closing oil path.The first shoulder 221 can be engaged to prevent the edge of valve pocket 22 with the locking nut 24
It is moved axially upward, and the precision that fits of bottom surface of the top surface of the first shoulder 221 and the clamp nut 24 meets
The requirement of closing oil path.
In order to further improve the sealing property of inventive piston unit, the locking nut 24 and the piston only 21
The screw thread vice division chief of threaded connection is coated with thread locking adhesive, is consolidated with ensureing that the locking nut 24 is installed in place rear position, and
And the sealing property of screw thread pair is improved, further increase the quality stability of inventive piston unit.
For the automatically reset function of the valve component for realizing inventive piston unit, the valve component further comprises
Spring 25, the valve element 23 is sheathed in the spring 25, the two ends of the spring 25 respectively with the valve pocket 22 and valve element 23
It is fixedly connected, i.e. the bottom surface of the first shoulder 221 is fixedly connected with one end of the spring 25, the bottom of the valve element 23
The second shoulder 233 is provided with, the top surface of second shoulder 233 is fixedly connected with the other end of the spring 25, described first
The bottom surface of the top surface of shoulder 221 and the locking nut 24 fits with closing oil path.
Specifically, when the 21 top oil liquid pressure increase of piston only, the top fluid compressing of piston only 21
The valve pocket 22 moves downward and compresses the spring 25, so that the oilhole 231 that unloads is separated with the valve pocket 22 so that institute
The fluid connection above and below piston only 21 is stated, after the oil liquid pressure above and below the piston only 21 is balanced,
The restoring force of the spring 25 makes the valve pocket 22 motion upwards, until the top surface of the first shoulder 221 and the locking screw
The bottom surface laminating of mother 24；When the 21 lower section oil liquid pressure increase of piston only, the lower section fluid compressing of piston only 21
The valve element 23 moves upwards and compresses the spring 25, so that the oilhole 231 that unloads is separated with the valve pocket 22 so that institute
The fluid connection above and below piston only 21 is stated, after the oil liquid pressure above and below the piston only 21 is balanced,
The restoring force of the spring 25 moves downward the valve element 23, until the bottom surface of valve element 23 and the bottom surface of piston only 21
Laminating.
It should be noted that the piston unit of the present invention is when mounted, the pretightning force of the spring 25 is adjusted, to ensure
The bottom surface for stating the top surface of first shoulder 221 and the locking nut 24 fits and meets the requirement of closing fluid.Second shoulder
The pad 26 of the adjustable pretightning force of the spring 25 is provided with 233, institute's pad 26 is provided with plurality of specifications, the pad of every kind of specification
The thickness of piece 26 is different, when changing the quantity and specification of the pad 26, you can the pretightning force of the regulation spring 25, so that
The piston unit of the present invention meets different off-load and damping requirements.
With continued reference to Fig. 3, as shown in figure 3, the valve element 23 axially arranged has second section away from one end of the spring 24
Discharge orifice 234, second throttle orifice 234 is connected with the blind hole 232.When the piston only 21 produces trickle upward fortune
Dynamic, i.e., the oil liquid pressure of the described top of piston only 21 has increased slightly, and the oil liquid pressure is not enough to overcome the spring 24
During elastic force, the fluid of the top of piston only 21 can be flowed into the blind hole 232 by second throttle orifice 234, and is led to
The first discharge port 211 crossed on the piston only 21 flows into the lower section of piston only 21, so as to reach off-load and effectiveness in vibration suppression.
Referring to Fig. 1 and Fig. 2, in the prior art, the bottom of the blind hole 131 of the valve element 13 has been radially arranged throttle orifice 133,
The throttle orifice 133 connects the fluid in the blind hole 131 with the fluid of the lower section of piston only 11, when the piston sheet
When body 11 produces trickle upward motion, the fluid of the top of piston only 11 can pass sequentially through the blind hole 131 and throttling
Hole 133 flows into the lower section of piston only 11, to realize off-load and effectiveness in vibration suppression.But because the throttle orifice 133 is located at the blind hole
132 bottom surface, processing is inconvenient, and when processing the throttle orifice 133, it is necessary to clamp the valve element 13 and the valve bonnet
The outer surface that 12 through holes 121 are engaged, inevitably influences the outer surface of valve element 13 and the inner surface of through hole 121
Fit precision.
It should be noted that because the top surface of piston only 21 is provided with piston rod, the top of piston only 21
Spatial volume is less than the spatial volume of the lower section of piston only 21, and therefore, the piston only 21 moves same displacement upwards
With, to the value added of the top oil liquid pressure of piston only 21, phase is moved downward less than the piston only 21 caused by identical speed
With caused by displacement and identical speed to the value added of the lower section oil liquid pressure of piston only 21, so as to cause the valve pocket 22 downward
Moving displacement is less than the upward moving displacement of the valve element 23, so cause the valve pocket 22 move downward caused by described unload oilhole
231 circulation areas, which are less than described in caused by the upward motion of the valve element 23, unloads the circulation area of oilhole 231, therefore, two-way off-load effect
It is really unequal.
In order to realize that two-way off-load damping power is equal, the sectional area of the valve pocket 22 need to be more than cutting for the valve element 23
Area, and the sectional area of the valve pocket 22 and the ratio of the sectional area of valve element 23 and diameter, the piston only 21 of the piston rod
The diameter of place working cylinder is relevant.The piston unit of the present invention only needs to adjust the sectional area of valve pocket 22 and valve in the design phase
The ratio of the sectional area of core 23 is that the damping force of achievable two-way off-load is equal, with needing to debug the piston sheet respectively in the prior art
The pretightning force of the spring 24 of the opposing sides upper valve body component of body 21 is compared, and packaging technology is greatly simplified, and is conducive to improving work effect
Rate.
Further, piston unit of the invention, sets the second throttle orifice 234 on the top of the valve element 23, passes through institute
State the second throttle orifice 234 makes the fluid of the upper and lower of piston only 21 be connected with blind hole 232, second throttle orifice 234
The top of the valve element 23 is arranged on, it is not only easy to process, and when processing second throttle orifice 234, need to only clamp
The outer surface of the least significant end of valve element 23, the outer surface at this is non-matching surface, and then does not interfere with inventive piston
The fit precision of unit, further increases the quality of inventive piston unit and the stability of precision.
When the valve element 23 is moved upwards, the bottom surface of the valve element 23 is separated with the bottom surface of the piston only 21, institute
Stating fluid not only by the blind hole 232 and can unload oilhole 231 and flow into the top of the piston only 21, and can pass through the valve
The sky that passage between the bottom surface of core 23 and the bottom surface of the piston only 21 enters between the valve element 23 and the piston only 21
Intracavitary.After the valve element 23 resets, cavity turns into closed cavity, the cavity again between the valve element 23 and piston only 21
Interior fluid continues to remain in the cavity, when the valve pocket 22 needs to move downward, as the valve pocket 22 continues downwards
Motion, the oil liquid pressure between the valve element 23 and piston only 21 in cavity gradually increases, the oil liquid pressure in the cavity
When equal with the oil liquid pressure of the top of piston only 21, the valve pocket 22 can not continue to move downward, and then influence to live
Fill in the unloading effect of unit.
In order to avoid above mentioned problem, piston unit of the invention, the bottom of valve element 23 is provided with outlet 235, described
Cavity between one end of outlet 235 and the valve element 23 and piston only 21 is connected, the other end of the outlet 235
It is connected with the blind hole 232, enters when the valve element 23 is moved upwards between the valve element 23 and piston only 21 in cavity
Fluid, the outlet 235, blind hole 232 and first discharge port 211 can be passed sequentially through when the valve pocket 22 is moved downward
Flow into the lower section of the piston only 21, it is ensured that the lower section fluid of piston only 21 and the valve element 23 and piston only 21 it
Between cavity oil liquid pressure balance, further increase the quality stability of inventive piston unit.
Referring to Fig. 4, as shown in figure 4, the valve component on the piston only 21 may be configured as one or more, with full
The different damping requirements of foot.When the valve component on the piston only 21 is set to multiple, the multiple valve component edge
Circumferentially it is uniformly distributed on the piston only 21, to increase the stability during the off-load of inventive piston unit and vibration damping.
Present invention further propose that a kind of oil-pressure damper, including working cylinder, foregoing work is provided with the working cylinder
Fill in unit.It is not described in detail herein.
Claims (10)
1. a kind of piston unit, is arranged on oil-pressure damper, including piston only (21), set on the piston only (21)
There is valve component, it is characterised in that：The valve component includes being arranged the piston only (21) and can be towards the piston sheet
The valve pocket (22) of body (21) bottom motion, the valve pocket (22) is engaged with closing oil path with the piston only (21)；It is described
The valve element (23) moved away from the piston only (21) bottom, the valve element (23) and valve pocket (22) are arranged with valve pocket (22)
Gap coordinates with closing oil path；
The valve element (23) is provided with the surface that valve pocket (22) is engaged unloads oilhole (231), the valve element (23) and piston sheet
One end that body (21) is engaged is provided with the blind hole (232) that can be connected with fluid below the piston only (21), described to unload
Oilhole (231) is connected with blind hole (232).
2. piston unit according to claim 1, it is characterised in that：Being further provided with the valve pocket (22) can be with institute
Piston only (21) is stated to be engaged to limit the first shoulder (221) that the valve pocket (22) is moved upwards, the valve element (23)
Bottom is engaged with the piston only (21) to be moved downward with limiting the valve element (23).
3. described in valve pocket (22) is axially arranged first through hole (222), the valve element (23) is sheathed on the first through hole (222)
In, valve element (23) gap is arranged at the first through hole (222) with closing oil path.
4. piston unit according to claim 1, it is characterised in that：The valve component further comprises locking nut
(24), the locking nut (24) is screwed tight in the piston only (21), and the locking nut (24) is axially arranged to have second to lead to
Hole (241), the valve pocket (22) is sheathed in second through hole (241), and valve pocket (22) gap is arranged at described second
Through hole (241) is with closing oil path.
5. piston unit according to claim 1, it is characterised in that：The valve component further comprises spring (25),
The valve element (23) is sheathed in the spring (25), the two ends of the spring (25) respectively with the valve pocket (22) and valve element
(23) it is fixedly connected.
6. piston unit according to claim 4, it is characterised in that：The first shoulder (221) simultaneously with the spring
(25) it is fixedly connected, first shoulder (221) another side fits with closing oil path with the locking nut (24).
7. piston unit according to claim 4, it is characterised in that：The bottom of the valve element (23) is provided with the second shoulder
(233), second shoulder (233) is fixedly connected with the spring (25), is provided with second shoulder (233) adjustable
The pad (26) of spring (25) pretightning force.
8. piston unit according to claim 1, it is characterised in that：The top of the valve element (23) is provided with the second throttling
Hole (234), second throttle orifice (234) is connected with the blind hole (232).
9. piston unit according to claim 1, it is characterised in that：Valve element (23) bottom is provided with outlet
(235), one end of the outlet (235) is connected with the cavity between the valve element (23) and piston only (21), described
The other end of outlet (235) is connected with the blind hole (232).
10. a kind of oil-pressure damper, including working cylinder, it is characterised in that：Set and appoint just like claim 1-9 in the working cylinder
Piston unit described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710512110.XA CN107237855A (en) | 2017-06-28 | 2017-06-28 | Piston unit and oil-pressure damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710512110.XA CN107237855A (en) | 2017-06-28 | 2017-06-28 | Piston unit and oil-pressure damper |
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| Publication Number | Publication Date |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB686371A (en) * | 1948-01-05 | 1953-01-21 | John Leslie Cloudsley | Improvements relating to hydraulic shock absorbers |
| CN2496696Y (en) * | 2001-09-04 | 2002-06-26 | 锦州万得汽车减振器有限公司 | Bidirectional damping-regulating vibration-damper piston structure |
| CN1601138A (en) * | 2003-09-27 | 2005-03-30 | 吕崇耀 | Method for changing hydraulic overflow in large flux into buffered throttle |
| CN2763634Y (en) * | 2005-01-28 | 2006-03-08 | 浙江大学 | Composite structured magnetorheological semi-active shock-damper |
| CN1967009A (en) * | 2006-11-15 | 2007-05-23 | 深圳市中车业成实业有限公司 | Structure of fluid-alternating oil pressure damper for use in rail-bound locomotive and vehicle |
| CN101016926A (en) * | 2007-02-06 | 2007-08-15 | 南京航空航天大学 | Undercarriage bumper having inner flow regulating valve |
| CN102630285A (en) * | 2009-10-07 | 2012-08-08 | 美提玛提科帕腾口有限责任公司 | Hydraulic damper spool valve |
| CN203009686U (en) * | 2012-12-07 | 2013-06-19 | 常州朗锐凯迩必减振技术有限公司 | Overflow valve used for oil damper |
-
2017
- 2017-06-28 CN CN201710512110.XA patent/CN107237855A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB686371A (en) * | 1948-01-05 | 1953-01-21 | John Leslie Cloudsley | Improvements relating to hydraulic shock absorbers |
| CN2496696Y (en) * | 2001-09-04 | 2002-06-26 | 锦州万得汽车减振器有限公司 | Bidirectional damping-regulating vibration-damper piston structure |
| CN1601138A (en) * | 2003-09-27 | 2005-03-30 | 吕崇耀 | Method for changing hydraulic overflow in large flux into buffered throttle |
| CN2763634Y (en) * | 2005-01-28 | 2006-03-08 | 浙江大学 | Composite structured magnetorheological semi-active shock-damper |
| CN1967009A (en) * | 2006-11-15 | 2007-05-23 | 深圳市中车业成实业有限公司 | Structure of fluid-alternating oil pressure damper for use in rail-bound locomotive and vehicle |
| CN101016926A (en) * | 2007-02-06 | 2007-08-15 | 南京航空航天大学 | Undercarriage bumper having inner flow regulating valve |
| CN102630285A (en) * | 2009-10-07 | 2012-08-08 | 美提玛提科帕腾口有限责任公司 | Hydraulic damper spool valve |
| CN203009686U (en) * | 2012-12-07 | 2013-06-19 | 常州朗锐凯迩必减振技术有限公司 | Overflow valve used for oil damper |
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