CN106015430B - A kind of buffer unit and hydro-pneumatic spring - Google Patents
A kind of buffer unit and hydro-pneumatic spring Download PDFInfo
- Publication number
- CN106015430B CN106015430B CN201610549781.9A CN201610549781A CN106015430B CN 106015430 B CN106015430 B CN 106015430B CN 201610549781 A CN201610549781 A CN 201610549781A CN 106015430 B CN106015430 B CN 106015430B
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- hydro
- hollow part
- ring
- pneumatic spring
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of buffer unit and hydro-pneumatic spring, device includes：Cylinder body；Guide sleeve is connect with cylinder body；Piston rod, the hollow part being connect including first end and with first end；Piston rod is arranged in cylinder body and guide sleeve；Wherein, it is rodless cavity between inboard wall of cylinder block and first end end face；Hollow part inner cavity is bar inner cavity；It is ring cavity between hollow part outer wall, inboard wall of cylinder block and guide sleeve end face；Wherein, through-hole, connecting rod inner cavity and ring cavity are offered on hollow part；The outer wall of hollow part is provided with groove with the connecting portion of first end, and groove extends to through-hole from connecting portion, with when guide sleeve blocks through-hole, bar inner cavity and ring cavity remain to be connected by groove.Hydro-pneumatic spring provided by the invention, solves hydro-pneumatic spring of the prior art, existing when entering stroke terminal, the technical issues of causing mechanical collision, generate very big impact.Gentle retarding braking is realized, improves the technique effect of the reliability of hydro-pneumatic spring.
Description
Technical field
The present invention relates to automobile mechanical technical field more particularly to a kind of buffer units and hydro-pneumatic spring.
Background technology
Hydro-pneumatic spring is not only the elastic element of automotive suspension, and also functions to the effect of hydraulic buffer, can decay
Road bump suffered by wheel causes the vibration of vehicle body, and damping effect is provided by damping unit.Hydro-pneumatic spring has following spy
Point：Non-linear rigidity, nonlinear dampling, bodywork height is adjusted, suspension system arrangement is compact, versatility, adaptability is good, change is oily
Gas spring chamber stuffing pressure, can obtain different suspension rate characteristics and accumulator energy storage is big.
However, hydro-pneumatic spring cylinder belongs to quick acting hydraulic cylinders, there is very big momentum under the driving of hydraulic coupling, it
Stroke terminal when head enters the end cap of hydraulic cylinder and cylinder bottom part, can cause mechanical collision, generate very big impact.
That is, hydro-pneumatic spring of the prior art, when existing into stroke terminal, can cause mechanical collision, generate
The technical issues of very big impact.
Invention content
The present invention solves hydro-pneumatic spring of the prior art, exists by providing a kind of buffer unit and hydro-pneumatic spring
When entering stroke terminal, the technical issues of causing mechanical collision, generate very big impact.
On the one hand, the embodiment of the present application provides following technical solution：
A kind of buffer unit, including：
Cylinder body, the cylinder body are hollow cylinder；
Guide sleeve, the guide sleeve are hollow cylinder, and the guide sleeve is fixedly connected with the cylinder body；
Piston rod, the piston rod include first end and the hollow part being connect with the first end；The piston rod
It is arranged in the cylinder body and the guide sleeve；The diameter of the first end is matched with the cylinder diameter, the hollow part
Diameter matched with the guide sleeve internal diameter；The diameter of the hollow part is less than the diameter of the first end；Wherein, the cylinder
It is in vivo rodless cavity between wall and the first end end face；The hollow part inner cavity is bar inner cavity；The hollow part outer wall, institute
State between inboard wall of cylinder block and the guide sleeve end face is ring cavity；
Wherein, through-hole is offered on the hollow part, to connect the bar inner cavity and the ring cavity；Outside the hollow part
Wall is provided with groove with the connecting portion of the first end, and the groove extends to the through-hole from the connecting portion, in institute
When stating guide sleeve and blocking the through-hole, the bar inner cavity and the ring cavity remain to be connected by the groove, to buffer the work
The relative motion of stopper rod and the cylinder body.
Optionally, the groove is specially：Around the annular ditch groove of the hollow part and the connecting portion of the first end.
Optionally, hydraulic oil is full of in the ring cavity；The bar inner cavity is full of hydraulic oil and high pressure nitrogen.
On the other hand, a kind of hydro-pneumatic spring is provided, including above-mentioned buffer unit, is further included：Accumulator and damping unit, institute
It states accumulator to connect with the cylinder body by the damping unit, the accumulator and the damping unit connect with the rodless cavity
It is logical.
Optionally, the hydro-pneumatic spring further includes：Dust scraping ring assembly, the dust scraping ring assembly include hanging konisphere and dust scraping ring
Housing；The extension konisphere and the dust scraping ring housing are fixedly connected by bolt and gasket with the guide sleeve.
Optionally, the hydro-pneumatic spring further includes：Upper lifting lug assembly and lower lifting lug assembly；Wherein, the upper lifting lug assembly
It is located at the both ends of the hydro-pneumatic spring respectively with the lower lifting lug assembly；Far from described on the upper lifting lug assembly and the cylinder body
One end connection of guide sleeve；The lower lifting lug assembly is connect with the second end of the piston rod；The second end with it is described
First end is opposite.
Optionally, it is offered for liquid filling body and/or gas on the upper lifting lug assembly and the lower lifting lug assembly
Filling-valve.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
Buffer unit and hydro-pneumatic spring provided by the embodiments of the present application, in conduction rod inner cavity and the through hole of ring cavity setting ditch
Slot structure so that when the through-hole, which is directed to set, to be blocked, bar inner cavity and ring cavity are remained to through the seam between groove and guide sleeve
Gap connects, and so as to after through-hole component is decreased to be blocked, continues through crevice throttle and provides buffering, provide " complete through-hole "-
" through-hole is gradually smaller "-" crevice throttle " three-level is slowed down, and has reached gentle retarding braking effect, eliminates oil cylinder in stroke end
The impact of generation and noise avoid the damage for causing all kinds of valves, piping and associated mechanical components, improve the reliable of hydro-pneumatic spring
Property.Further, through-hole is set to provide buffering, does not need to set additional buffer unit, it is at low cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only the embodiment of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to the attached drawing of offer other
Attached drawing.
Fig. 1 is the structure chart of buffer unit in the embodiment of the present application；
Fig. 2 is the structure chart of through-hole in the embodiment of the present application；
Fig. 3 is the buffering schematic diagram of buffer unit in the embodiment of the present application；
Fig. 4 is the structure chart of piston rod in the embodiment of the present application.
Specific embodiment
The embodiment of the present application solves oil gas bullet of the prior art by providing a kind of buffer unit and hydro-pneumatic spring
Spring, it is existing when entering stroke terminal, the technical issues of causing mechanical collision, generate very big impact.It realizes gentle
Retarding braking improves the technique effect of the reliability of hydro-pneumatic spring.
In order to solve the above technical problems, the general thought that the embodiment of the present application provides technical solution is as follows：
The application provides a kind of buffer unit, including：
Cylinder body, the cylinder body are hollow cylinder；
Guide sleeve, the guide sleeve are hollow cylinder, and the guide sleeve is fixedly connected with the cylinder body；
Piston rod, the piston rod include first end and the hollow part being connect with the first end；The piston rod
It is arranged in the cylinder body and the guide sleeve；The diameter of the first end is matched with the cylinder diameter, the hollow part
Diameter matched with the guide sleeve internal diameter；The diameter of the hollow part is less than the diameter of the first end；Wherein, the cylinder
It is in vivo rodless cavity between wall and the first end end face；The hollow part inner cavity is bar inner cavity；The hollow part outer wall, institute
State between inboard wall of cylinder block and the guide sleeve end face is ring cavity；
Wherein, through-hole is offered on the hollow part, to connect the bar inner cavity and the ring cavity；Outside the hollow part
Wall is provided with groove with the connecting portion of the first end, and the groove extends to the through-hole from the connecting portion, in institute
When stating guide sleeve and blocking the through-hole, the bar inner cavity and the ring cavity remain to be connected by the groove, to buffer the work
The relative motion of stopper rod and the cylinder body.
Through the above as can be seen that buffer unit provided by the embodiments of the present application and hydro-pneumatic spring, in conduction rod
The through hole of chamber and ring cavity sets groove structure so that when the through-hole, which is directed to set, to be blocked, bar inner cavity and ring cavity remain to lead to
The gap area between groove and guide sleeve is crossed, so as to after through-hole component is decreased to be blocked, continue through crevice throttle and carry
For buffering, " complete through-hole "-" through-hole is gradually smaller "-" crevice throttle " three-level is provided and is slowed down, has reached gentle retarding braking
Effect eliminates impact and noise that oil cylinder is generated in stroke end, avoids the damage for causing all kinds of valves, piping and associated mechanical components
It is bad, improve the reliability of hydro-pneumatic spring.Further, through-hole is set to provide buffering, does not need to set additional buffer unit, into
This is low.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill
The detailed description of art scheme rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application
And the technical characteristic in embodiment can be combined with each other.
Embodiment one
In the present embodiment, a kind of buffer unit is provided, is please referred to Fig.1, the buffer unit includes：
Cylinder body 1, the cylinder body 1 are hollow cylinder；
Guide sleeve 2, the guide sleeve 2 are hollow cylinder, and the guide sleeve 2 is fixedly connected with the cylinder body 1；
Piston rod 3, the piston rod 3 include first end 31 and the hollow part 32 being connect with the first end；It is described
Piston rod 3 is arranged in the cylinder body 1 and the guide sleeve 2；The diameter of the first end 31 and 1 internal diameter of cylinder body
Match, the diameter of the hollow part 32 is matched with 2 internal diameter of guide sleeve；The diameter of the hollow part 32 is less than the first end
31 diameter；Wherein, it is rodless cavity 4 between 1 inner wall of cylinder body and 31 end face of the first end；32 inner cavity of hollow part
For bar inner cavity 5；It is ring cavity 6 between 32 outer wall of hollow part, 2 end face of 1 inner wall of the cylinder body and the guide sleeve；
Wherein, through-hole 33 is offered on the hollow part 32, to connect the bar inner cavity 5 and the ring cavity 6；It is described hollow
The outer wall in portion 32 is provided with groove 34 with the connecting portion of the first end 31, and the groove 34 is extended to from the connecting portion
The through-hole 33, with when the guide sleeve 2 blocks the through-hole 33, the bar inner cavity 5 and the ring cavity 6 are remained to by described
Groove 34 is connected, to buffer the relative motion of the piston rod 3 and the cylinder body 1.
In specific implementation process, the buffer unit can be used for hydro-pneumatic spring, can be used for what other need to be buffered
Equipment, this is not restricted.
The structure and operation principle of the buffer unit is described in detail below：
First, the structure of the buffer unit is introduced.
In specific implementation process, the groove 34 is as shown in Fig. 2, can be：Around the hollow part 32 and described the
The annular ditch groove of the connecting portion of one end 31.Certainly, in specific implementation process, the groove can also be around the connection
Portion is provided only on the position for offering through-hole 33.
Specifically, the cross section of the shown groove can be illustrated in figure 2 square trench, or arcuate furrow
Or wavy groove, it is not restricted in this application.
Specifically, the groove 34 extends to the through-hole 33 from the connecting portion, to block institute in the guide sleeve 2
When stating through-hole 33, also there are a gap between 34 bottom surface of groove and guide sleeve 2, so that in the bar inner cavity 5 and the ring cavity 6
Liquid and/or gas remain to be connected by the groove 34, and to provide more first-level buffers, it is complete which extends to guide sleeve 2
The groove 34 is blocked entirely.
It, can be with as shown in Fig. 2, the groove 34 be set to connect the first end 31 and through-hole in specific implementation process
33, so that the piston rod 3 is when moving to end of travel, it also can be by the gap between 34 bottom surface of groove and guide sleeve 2
Buffering；It is of course also possible to which the groove 34 is set to be spaced a distance with the first end 31, this is not restricted.
In specific implementation process, hydraulic oil is full of in the ring cavity 6；The bar inner cavity 5 is full of hydraulic oil and elevated pressure nitrogen
Gas.
Specifically, buffer unit provided in this embodiment is in conduction rod inner cavity and the through hole of ring cavity setting groove knot
Structure so that when the through-hole, which is directed to set, to be blocked, bar inner cavity and ring cavity remain to connect by the gap between groove and guide sleeve
It is logical, buffering is provided so as to after through-hole component is decreased to be blocked, continue through crevice throttle, " complete through-hole "-" through-hole is provided
It is gradually smaller " deceleration of-" crevice throttle " three-level, reach gentle retarding braking effect, eliminated oil cylinder and generated in stroke end
Impact and noise, avoid the damage for causing all kinds of valves, piping and associated mechanical components, improve reliability.
Next, introduce the operation principle of the buffer unit.
It is moved below with the first end 31 of piston rod 3 along the direction close to the guide sleeve 2 as compression travel；Piston rod
3 first end 31 is moved along the direction far from the guide sleeve 2 as extension stroke：
It please referring to Fig.3, Fig. 3 is the buffering schematic diagram of the buffer unit, as shown in figure 3, when buffer unit works, it is living
Stopper rod 3 makees straight reciprocating motion.When piston rod 3 is in the certain distance before reaching compression travel end, the fluid of ring cavity 6 leads to
It crosses through-hole 33 and enters bar inner cavity 5 from ring cavity 6；When entering compression travel end, through-hole 33 is gradually directed to set 2 and blocks, through-flow
Area reduces, and damping force becomes larger；When entering compression travel least significant end, through-hole 33 is directed to set 2 and blocks completely, remaining liquid
Pressure oil is closed, and the ring-shaped groove 34 on piston rod 3 forms throttle chink with guide sleeve 2, and hydraulic oil is entered by gap in bar
Chamber 5, damping force reach maximum.In the process, hydraulic oil have passed through in oil extraction " complete through-hole "-" through-hole is gradually smaller "-
" crevice throttle " three-level is slowed down, and has reached gentle retarding braking effect.
When buffer unit extension stroke, 3 counter motion of piston rod, the hydraulic oil direction of motion is opposite with the above process.It opens
When dynamic, the oil of bar inner cavity 5 enters ring cavity 6 by gap, and pressure is acted on the end of piston rod 3；It is gradual that through-hole 33 is undergone again
Become larger, be finally completely exposed, have passed through " crevice throttle "-" through-hole gradually increases "-" complete through-hole " three-level buffering.
In specific implementation process, section can be set by controlling the depth of groove 34 according to specific buffering needs
The size in gap is flowed, so as to control buffering effect.
Based on same inventive concept, present invention also provides embodiments two.
Embodiment two
In the present embodiment, a kind of hydro-pneumatic spring is provided, the hydro-pneumatic spring includes the buffering described in embodiment one
Device, the hydro-pneumatic spring further include：
Accumulator and damping unit, the accumulator are connected by the damping unit with the cylinder body, the accumulator
It is connected with the damping unit with the rodless cavity.
In specific implementation process, the hydro-pneumatic spring can be the elastic element or moving machine of automotive suspension
The elastic element of device people, this is not restricted.
In the embodiment of the present application, the hydro-pneumatic spring further includes：Accumulator and damping unit, the accumulator pass through institute
It states damping unit to connect with the cylinder body 1, the accumulator and the damping unit are connected with the rodless cavity 4.
In the embodiment of the present application, the hydro-pneumatic spring further includes：
Dust scraping ring assembly, the dust scraping ring assembly include hanging konisphere and dust scraping ring housing；The extension konisphere and the dust blowing
Circle housing is fixedly connected by bolt and gasket with the guide sleeve 2.The dust scraping ring assembly is used to prevent dust from entering cylinder body
1。
Preferably, the hydro-pneumatic spring, further includes：
Upper lifting lug assembly and lower lifting lug assembly；Wherein, the upper lifting lug assembly and the lower lifting lug assembly are located at institute respectively
State the both ends of hydro-pneumatic spring；The upper lifting lug assembly is connect with one end far from the guide sleeve 2 on the cylinder body 1；Under described
Lifting lug assembly is connect with the second end of the piston rod 3；The second end is opposite with the first end.
In specific implementation process, the main connection mode of the hydro-pneumatic spring is：Upper lifting lug assembly is screw thread with cylinder body 2
Connection, it is locking by gasket and locking nut；Piston rod 3 is with lower lifting lug assembly to be threadedly coupled；Guide sleeve 2 is spiral shell with cylinder body 1
Line connects；Dust scraping ring assembly is connect with guide sleeve 2 by bolt and gasket, certainly, in specific implementation process, each critical component
It can also be connected by bayonet arrangement or friction structure, this is not restricted.
Specifically, guide sleeve 2, dust scraping ring assembly and cylinder body 1 are directly bolted, and have saved space.
In the embodiment of the present application, it is offered for liquid filling body on the upper lifting lug assembly and the lower lifting lug assembly
And/or the filling-valve of gas.
Wherein, the filling-valve on the upper lifting lug assembly is used for 4 filling gas of rodless cavity and/or liquid；It is described
Filling-valve on lower lifting lug assembly is used for the bar inner cavity 5 and 6 filling gas of the ring cavity and/or liquid.
In the embodiment of the present application, the upper lifting lug assembly includes：
Upper lifting lug, O-ring seal and Sealing shield ring；
Wherein, the O-ring seal and the Sealing shield ring are set to the engaging portion of the upper lifting lug and the cylinder body 1,
The O-ring seal is elastic seal ring, to increase the connection sealing of the upper lifting lug assembly and the cylinder body 1.
Further, the upper lifting lug assembly further includes：
Circlip for hole and radial bearing；Wherein, it offers lifting lug on the upper lifting lug and hangs ring through hole；It uses in the hole
Circlip and the radial bearing are arranged on the upper lifting lug and hang in ring through hole.The radial bearing is used for connecting the pin on vehicle
Axis realizes the connection with vehicle frame.
Similar, the lower lifting lug assembly includes：
O-ring seal, Sealing shield ring, lower lifting lug, circlip for hole and radial bearing；
Wherein, the O-ring seal and the Sealing shield ring are set to the combination of the lower lifting lug and the piston rod 3
Portion, the O-ring seal is elastic seal ring, to increase the connection sealing of the lower lifting lug assembly and the piston rod 3；
Wherein, it offers lower lifting lug on the lower lifting lug and hangs ring through hole；The circlip for hole and the radial bearing
The lower lifting lug is arranged on to hang in ring through hole.
Specifically, the lower lifting lug assembly of hydro-pneumatic spring is connected by axis pin and suspension link with wheel, and upper lifting lug assembly leads to
The bearing crossed axis pin and be fixed on vehicle frame is connected with vehicle frame.Since installation is oriented inside the upper lifting lug of hydro-pneumatic spring and lower lifting lug
Mandrel is held, and radial bearing has automatic aligning effect, can eliminate since lifting lug on hydro-pneumatic spring and lower two installation point of lifting lug are left and right
Occurring deviateing causes hydro-pneumatic spring inner piston rod 3 to lead to the problem of eccentric wear with cylinder body 1 during up and down motion.
In the embodiment of the present application, as shown in figure 4, the piston rod 3 further includes：
Locking nut 301, compression ring 302, lip combined seal ring 303, end cap 304 and wearing ring 305
Wherein, the locking nut 301, the compression ring 302, the lip combined seal ring 303 and the wearing ring
305 are set in the first end 31；
Wherein, the end cap 304 is used to seal the hollow part 32；The locking nut 301 squeezes the compression ring
302, and then squeeze the lip combined seal ring 303；The lip combined seal ring 303 is elastic seal ring, to increase
State the leakproofness of piston rod 3 and 1 inner wall of cylinder body.
Further, the lip combined seal ring includes：O-ring and the sealing lip being connect with the O-ring, the sealing
The size of lip is more than the O-ring；When the O-ring is squeezed by the compression ring, the O-ring deformation makes the sealing lip
Outer diameter increases, to realize self compensation.
Specifically, the compression ring 302 can there are two, two compression rings 302 are issued in the extruding of locking nut 301
Raw certain elastic deformation generates the active force of similar disc spring, while compression ring 302 acts on the O of lip combined seal ring 303
On type circle, O-ring crimp increases sealing lip outer diameter, and this structure has self-compensating function, even if lip combination sealing
Circle 303 is worn, and under the action of disc spring force, lip external diameter becomes larger, and ensures sealing function.Wearing ring is in reciprocating motion
It plays a supportive role.
Certainly, in specific implementation process, the quantity of the compression ring 302 could be provided as 3 or 4, not make herein
Limitation.
In the embodiment of the present application, the guide sleeve 2 is used to guide the direction of 3 back and forth movement of piston rod, described to lead
Include to set：
Compression ring, O-ring seal, Sealing shield ring, is oriented to set of shells and wearing ring at lip combined seal ring；
Wherein, the compression ring, the lip combined seal ring, the O-ring seal, the Sealing shield ring and described anti-
Bull ring is set in the guiding set of shells；The compression ring squeezes the lip combined seal ring, to increase leakproofness.
It is similar with the piston rod 3, the compression ring of the guide sleeve 2 can there are two, two compression rings are total in dust scraping ring
Into extruding under occur certain elastic deformation, generate the active force of similar disc spring, while to act on lip combination close for compression ring
On the O-ring of seal, O-ring crimp increases sealing lip outer diameter, and this structure has self-compensating function, even if sealing
Circle is worn, and under the action of disc spring force, lip external diameter becomes larger, and ensures sealing function.Wearing ring rises in reciprocating motion
Supporting role.
Certainly, in specific implementation process, the quantity of the compression ring could be provided as 3 or 4, not limit herein
System.
Technical solution in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
Buffer unit and hydro-pneumatic spring provided by the embodiments of the present application, in conduction rod inner cavity and the through hole of ring cavity setting ditch
Slot structure so that when the through-hole, which is directed to set, to be blocked, bar inner cavity and ring cavity are remained to through the seam between groove and guide sleeve
Gap connects, and so as to after through-hole component is decreased to be blocked, continues through crevice throttle and provides buffering, provide " complete through-hole "-
" through-hole is gradually smaller "-" crevice throttle " three-level is slowed down, and has reached gentle retarding braking effect, eliminates oil cylinder in stroke end
The impact of generation and noise avoid the damage for causing all kinds of valves, piping and associated mechanical components, improve the reliable of hydro-pneumatic spring
Property.Further, through-hole is set to provide buffering, does not need to set additional buffer unit, it is at low cost.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of buffer unit, which is characterized in that the buffer unit includes：
Cylinder body, the cylinder body are hollow cylinder；
Guide sleeve, the guide sleeve are hollow cylinder, and the guide sleeve is fixedly connected with the cylinder body；
Piston rod, the piston rod include first end and the hollow part being connect with the first end；The piston rod is worn
In in the cylinder body and the guide sleeve；The diameter of the first end is matched with the cylinder diameter, the hollow part it is straight
Diameter is matched with the guide sleeve internal diameter；The diameter of the hollow part is less than the diameter of the first end；Wherein, in the cylinder body
It is rodless cavity between wall and the first end end face；The hollow part inner cavity is bar inner cavity；The hollow part outer wall, the cylinder
It is in vivo ring cavity between wall and the guide sleeve end face；
Wherein, through-hole is offered on the hollow part, to connect the bar inner cavity and the ring cavity；The outer wall of the hollow part,
The connecting portion of the first end is provided with groove, the groove extends to the through-hole from the connecting portion, with described
When guide sleeve blocks the through-hole, the bar inner cavity and the ring cavity remain to be connected by the groove, to buffer the piston
The relative motion of bar and the cylinder body.
2. buffer unit as described in claim 1, which is characterized in that the groove is specially：Around the hollow part and institute
State the annular ditch groove of the connecting portion of first end.
3. buffer unit as described in claim 1, which is characterized in that hydraulic oil is full of in the ring cavity；The bar inner cavity is filled
Full hydraulic oil and nitrogen.
4. a kind of hydro-pneumatic spring, which is characterized in that the hydro-pneumatic spring includes any buffer units of claim 1-3,
The hydro-pneumatic spring further includes：
Accumulator and damping unit, the accumulator are connected by the damping unit with the cylinder body, the accumulator and institute
Damping unit is stated to connect with the rodless cavity.
5. hydro-pneumatic spring as claimed in claim 4, which is characterized in that further include：
Dust scraping ring assembly, the dust scraping ring assembly include hanging konisphere and dust scraping ring housing；The extension konisphere and the dust scraping ring shell
Body is fixedly connected by bolt and gasket with the guide sleeve.
6. hydro-pneumatic spring as claimed in claim 4, which is characterized in that further include：
Upper lifting lug assembly and lower lifting lug assembly；Wherein, the upper lifting lug assembly and the lower lifting lug assembly are located at the oil respectively
The both ends of gas spring；The upper lifting lug assembly is connect with one end far from the guide sleeve on the cylinder body；The lower lifting lug is total
It is connect into the second end with the piston rod；The second end is opposite with the first end.
7. hydro-pneumatic spring as claimed in claim 6, which is characterized in that on the upper lifting lug assembly and the lower lifting lug assembly
Offer the filling-valve for liquid filling body and/or gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549781.9A CN106015430B (en) | 2016-07-13 | 2016-07-13 | A kind of buffer unit and hydro-pneumatic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549781.9A CN106015430B (en) | 2016-07-13 | 2016-07-13 | A kind of buffer unit and hydro-pneumatic spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015430A CN106015430A (en) | 2016-10-12 |
| CN106015430B true CN106015430B (en) | 2018-06-19 |
Family
ID=57117793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610549781.9A Active CN106015430B (en) | 2016-07-13 | 2016-07-13 | A kind of buffer unit and hydro-pneumatic spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015430B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110834506B (en) * | 2019-11-06 | 2021-07-20 | 湖北航天技术研究院特种车辆技术中心 | Suspension second grade stop device, suspension limit structure and oil gas suspension |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100866467B1 (en) * | 2007-06-11 | 2008-10-31 | 태동프라임 주식회사 | Cylindrical shock absorber |
| CN203322140U (en) * | 2013-05-13 | 2013-12-04 | 南阳淅减汽车减振器有限公司 | Shock absorber recovery damping valve |
| JP6239420B2 (en) * | 2014-03-27 | 2017-11-29 | 株式会社ショーワ | Hydraulic shock absorber |
| CN204140745U (en) * | 2014-09-15 | 2015-02-04 | 陕西中航气弹簧有限责任公司 | Semitrailer crusherbull zone hydro-pneumatic spring |
| CN204664274U (en) * | 2015-05-29 | 2015-09-23 | 常州气弹簧有限公司 | Air spring piston rod assembly |
| CN105443638A (en) * | 2015-12-31 | 2016-03-30 | 河海大学常州校区 | Energy storing type buffer |
-
2016
- 2016-07-13 CN CN201610549781.9A patent/CN106015430B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106015430A (en) | 2016-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204784408U (en) | Bridge cable bumper shock absorber | |
| CN106763414B (en) | A gas-liquid two-phase oil-gas spring | |
| CN209493285U (en) | Fork truck buffer lift oil cylinder | |
| CN106015430B (en) | A kind of buffer unit and hydro-pneumatic spring | |
| US8371424B2 (en) | Yaw damper with pump | |
| CN108662068A (en) | Damper and washing machine including the damper | |
| CN101117145A (en) | Minitype tricar and motorcycle front suspension | |
| US3074708A (en) | Vehicle suspension | |
| CN209724846U (en) | A kind of low friction high-speed oil cylinder | |
| CN210769993U (en) | Amphibious motorcycle lifting shock absorber | |
| CN211116905U (en) | A kind of buffer damping device for hydraulic cylinder | |
| CN104948635A (en) | Magnetorheological shock absorber of automobile | |
| CN115013464B (en) | Oil-gas spring and vehicle suspension device | |
| CN107255134B (en) | Viscoelastic medium buffer | |
| CN106195095A (en) | A kind of hydro-pneumatic spring | |
| CN208007207U (en) | Front shock-absorbing device of tricycle | |
| CN102758873A (en) | Damper | |
| CN201391511Y (en) | Hydraulic cylinder cushioning device | |
| CN205896014U (en) | Can effectively avoid connecting rod novel shock absorber of mill partially | |
| CN212685149U (en) | Accumulator vertical balance hydro-pneumatic suspension | |
| CN207762177U (en) | A kind of shock absorber of bidirectional modulation | |
| CN212889741U (en) | Energy accumulator horizontal balance hydro-pneumatic suspension | |
| CN111022550B (en) | Independent hydro-pneumatic suspension with detection device | |
| CN207762042U (en) | A kind of novel steam auto engine oil cylinder | |
| CN108662071A (en) | Shock mitigation system and washing machine including the shock mitigation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |