CN108426012A - A kind of electric pushrod and its oiling method with Refuel structure - Google Patents
A kind of electric pushrod and its oiling method with Refuel structure Download PDFInfo
- Publication number
- CN108426012A CN108426012A CN201810472100.2A CN201810472100A CN108426012A CN 108426012 A CN108426012 A CN 108426012A CN 201810472100 A CN201810472100 A CN 201810472100A CN 108426012 A CN108426012 A CN 108426012A
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- nut
- wall
- lead screw
- via hole
- oiling
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 60
- 239000000945 filler Substances 0.000 claims description 36
- 239000000446 fuel Substances 0.000 claims description 36
- 239000007787 solid Substances 0.000 claims 1
- 239000004519 grease Substances 0.000 abstract description 18
- 238000005461 lubrication Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 18
- 210000002421 cell wall Anatomy 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of electric pushrod and its oiling method with Refuel structure, belong to Linear transmission technical field, include the nut of outer tube, inner tube, lead screw and axial movably arranged along lead screw, nut is mounted on lead screw, lead screw is set in inner tube, inner tube is set in outer tube, nut is mounted on the inner tube, oil pocket is formed between the inner wall and lead screw of inner tube, accessibke porosity is offered on the side wall of outer tube, inner via hole is offered on the side wall of inner tube, inner via hole and oil pocket perforation, inner via hole are used for oil pocket oiling.The advantage of the invention is that oiling is carried out to oil pocket by inner via hole, so that grease supplement can be obtained between lead screw and nut.The relative motion between lead screw and nut is utilized simultaneously so that lead screw and nut can drive grease to move, so that can remain the state of grease lubrication between lead screw and nut.
Description
【Technical field】
The present invention relates to a kind of electric pushrod and its oiling method with Refuel structure belongs to Linear transmission technology neck
Domain.
【Background technology】
Electric pushrod, it is to drive lead screw rotation, lead screw by motor to be generally also linear actuators, main operational principle
Upper setting transmission nut drives transmission nut to move back and forth when lead screw rotates.
Conventional electric pushrod can be added at one time appropriate grease before assembly is dispatched from the factory, and in electric pushrod service life model
Enclose it is interior substantially no longer carry out grease supplement.For the electric pushrod used in normal circumstances, service life use can be met
Demand.
But by taking the solar energy push rod that family (room) uses outside as an example for, service life require be up to 25 years, lead screw and
The grease initially added on nut is insufficient to allow the use demand that solar energy push rod reaches 25 years, in solar energy push rod service life
The state of grease lubrication can not be remained during use in range between lead screw and nut.
【Invention content】
It is provided technical problem to be solved by the present invention lies in overcome the deficiencies in the prior art a kind of with Refuel structure
Electric pushrod and its oiling method, during electric pushrod use, can periodically be electric pushrod fill grease, protect always
Holding has grease lubrication between lead screw and nut.
Above-mentioned technical problem is solved, the present invention adopts the following technical scheme that：
A kind of electric pushrod with Refuel structure, including outer tube, inner tube, lead screw and the axial movably arranged along lead screw
Nut, nut be mounted on lead screw on, lead screw is set in inner tube, and inner tube is set in outer tube, and nut is mounted on the inner tube, interior
Oil pocket is formed between the inner wall and lead screw of pipe, and accessibke porosity is offered on the side wall of outer tube, inner via hole is offered on the side wall of inner tube,
Inner via hole and oil pocket perforation, inner via hole are used for oil pocket oiling.
When accessibke porosity is penetrated through with inner via hole, by accessibke porosity to inner via hole oiling, to carry out oiling to oil pocket, so that
Grease supplement can be obtained between lead screw and nut.The relative motion between lead screw and nut is utilized simultaneously so that lead screw and spiral shell
Mother can drive grease to move, so that can remain the state of grease lubrication between lead screw and nut.Using lead screw and
Nut relative motion drive grease movement mode make between lead screw and nut lubricate needed for grease amount be able to maintain that compared with
Low-level, while higher lubricant effect between lead screw and nut can be kept.
Nut of the present invention is located at one end of oil pocket, and the other end of oil pocket is provided with closure member, nut and closure member point
The both ends of other oil closed cavity, inner via hole is between closure member and nut.Oil pocket other than inner via hole without other entrances and
Outlet so that the oil in oil pocket can obtain the preservation of long period, and the oil reduced in oil pocket outflows out of oil pocket.
Closure member of the present invention is spacing ring, and spacing ring is mounted on lead screw.Spacing ring can be to nut in screw axis
Hard position-limiting action is played in position when activity upwards, at the same spacing ring can prevent lead screw in rotation process with the inner wall of inner tube
Contact.
Lead screw of the present invention includes the smooth section and transmission segment being fixed to each other, and nut is threadedly coupled with transmission segment, limit
The inner wall of ring is fitted on the outer wall of smooth section, and the outer wall of spacing ring and the outer wall of nut are fitted on the inner wall of inner tube.Spiral shell
The mode that mother is threadedly coupled with transmission segment to seal between the inner wall of nut and the outer wall of transmission segment, the inner wall fitting of spacing ring
The mode of smooth section outer wall to seal between the inner wall of spacing ring and the outer wall of smooth section.The outer wall of spacing ring and nut it is outer
The form that wall is fitted in the inner wall inner wall of inner tube to seal between the outer wall of spacing ring and the inner wall of inner tube, while making nut
Outer wall and the inner wall of inner tube between seal, ensure that oil pocket other than inner via hole without other entrance and exits really.
Filling passage is formed between on the inside of inner via hole of the present invention and on the outside of accessibke porosity, filling passage is used for from accessibke porosity
Outside is provided with sealing element to oil pocket oiling in filling passage, sealing element is connected with return unit, and return unit is for making sealing element hinder
Disconnected filling passage.When non-oiling, sealing element blocks filling passage under return unit effect, and then can not be on the outside of accessibke porosity to oil
Chamber oiling, when oiling, sealing element overcomes return unit to act on so that filling passage is unimpeded, enables a user to from accessibke porosity
Outside is to oil pocket oiling.
Fuel filler neck is provided on accessibke porosity of the present invention, fuel filler neck is used for accessibke porosity oiling, and return unit is close for making
Sealing blocks the mouthpiece of fuel filler neck, and return unit is spring, and sealing element is fixed on spring, and spring and sealing element are respectively positioned on fuel filler neck
Interior, the end of spring is fixed on the inner wall of fuel filler neck or the outer wall of outer tube.Under non-oiling state, it will be sealed by return unit
Part gets lodged in the mouthpiece of fuel filler neck, to realize that oil is sealed in electric pushrod.When oiling, sealing element is resetted by oil pressure counter
Part acts on so that the mouthpiece and inner via hole of fuel filler neck penetrate through, to realize to electric pushrod oiling.Spring structure is simple, volume
It is smaller, it can be installed in fuel filler neck, while not interfering with the flowing of oil.In addition be located at fuel filler neck in spring and sealing element not
It can influence the relative motion between inner and outer tubes.
Sealing element of the present invention is set in oil pocket, and return unit is for making sealing element block inner via hole.It is close when non-oiling
Sealing blocks inner via hole under return unit effect on the inside of inner via hole so that inner via hole can not oil inlet or fuel-displaced, it is close when oiling
Sealing overcome return unit effect leave inner via hole so that inner via hole can oil inlet it is fuel-displaced.
The outer wall of inner tube of the present invention is provided with for the oil guide groove to inner via hole oiling, and the slot bottom of oil guide groove is positioned at interior
On the outer wall of pipe, slot bottom and the inner via hole of oil guide groove penetrate through, and accessibke porosity is for the notch oiling to oil guide groove.Inner tube and outer tube it
Between will produce relative movement, in accessibke porosity not under oil guide groove alignment case, accessibke porosity can not be to the accurate oiling of oil guide groove, in turn
It can not be to the accurate oiling of inner via hole.And when inner tube and outer tube relative motion to specific position so that accessibke porosity alignment perforation is to leading
The notch of oil groove, you can by accessibke porosity to carrying out accurate oiling in oil guide groove, and then to the accurate oiling of inner via hole.
The quantity of inner via hole of the present invention is two or more, and all inner via holes are connected to oil guide groove.To leading in one
Hole carries out oiling, and the air in oil pocket passes through remaining inner via hole and the air communication in oil guide groove so that in oil pocket and Oil Guide
There is no draught head between slot, keep the oiling process to oil pocket more smooth.
The inner wall of outer tube of the present invention is used to seal the notch of oil guide groove.It is not aligned with the notch of oil guide groove in accessibke porosity
In the case of, the notch of oil guide groove is fully sealed the inner wall of outer tube, then oil can be limited in oil guide groove and oil pocket, accessibke porosity with
When the notch alignment perforation of oil guide groove, the grease of accessibke porosity injection can fully flow into oil guide groove, to fully flow into oil pocket
In.
There are airspaces between the inner wall of outer tube of the present invention and the notch of oil guide groove.Airspace size is smaller,
Air can keep air pressure consistent with air communication in outer tube in oil guide groove when oiling so that and oiling process can be more smooth,
Accurate oiling of the accessibke porosity to oil guide groove is not influenced simultaneously.
It is sealed between the inner wall of nut and outer tube of the present invention, the outer tube one end sealing adjacent with closure member.The structure
So that forming the structure of a relative closure between outer tube and inner tube.
A kind of oiling method of the electric pushrod with Refuel structure, includes the following steps：
Step is 1.：By accessibke porosity to inner via hole oiling, to make inner via hole to oil pocket oiling；
Step is 2.：The oil in oil pocket is driven to move when axially generating relative movement along lead screw between nut and lead screw
In such a way that nut and lead screw relative movement drive oil mobile so that the lubricant effect between nut and lead screw is most
To be uniform, the loss simultaneously for oil is also smaller.
When the present invention does not carry out oiling, sealing element blocks the mouthpiece of fuel filler neck by spring force；Fuel filler neck is noted
When oily, sealing element leaves the mouthpiece of fuel filler neck under oil pressure effect.The mode of sealing element and spring cooperation control fuel filler neck into
It is final to control inner tube oil inlet whether oil.
The other features and advantages of the invention will the detailed exposure in following specific implementation mode, attached drawing.
【Description of the drawings】
Following further describes the present invention with reference to the drawings：
Fig. 1 is the electric pushrod main view schematic cross-sectional view that the embodiment of the present invention 1 has Refuel structure；
Fig. 2 is the embodiment of the present invention 1, and there is the electric pushrod right side of Refuel structure to regard schematic cross-sectional view；
Fig. 3 is the electric pushrod configuration schematic diagram that the embodiment of the present invention 1 has Refuel structure.
【Specific implementation mode】
The technical solution of the embodiment of the present invention is explained and illustrated with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiment without making creative work, belongs to protection scope of the present invention.
In the following description, occur the indicating positions such as term "inner", "outside", "upper", "lower", "left", "right" or
Position relationship is to be based on the orientation or positional relationship shown in the drawings, description embodiment merely for convenience and simplified description, and
It is not instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
Embodiment 1.
Referring to Fig. 1-3.
Present embodiments provide a kind of electric pushrod with Refuel structure, including lead screw 3, nut 4 and inner tube 2.Nut 4
It is threaded on lead screw 3, so that nut 4 can make a relative move along the axial direction of lead screw 3.Wherein, in lead screw 3 is set to
In pipe 2, nut 4 is set in inner tube 2, and oil pocket is formed between the inner wall and lead screw 3 of inner tube 2.It is opened up on the side wall of inner tube 2 useful
In the inner via hole to oil pocket oiling, inner via hole and oil pocket perforation.
There is the present embodiment the oiling method of the electric pushrod of Refuel structure to include the following steps：By inner via hole to oil pocket
Oiling drives the oil in oil pocket to move between nut 4 and lead screw 3 when generation relative movement axial along lead screw 3.
The present embodiment carries out oiling by inner via hole to oil pocket, so that can obtain grease benefit between lead screw 3 and nut 4
It fills.Simultaneously because the axial relative movement along lead screw 3 can be generated between nut 4 and lead screw 3, therefore by injection oil pocket
Oil can spread all over lead screw 3 with the relative movement of lead screw 3 and nut 4, ensure lead screw 3 and nut 4 energy in relative movement
Enough remain the state of grease lubrication.In addition, can using the amount for lubricating required grease between this mode lead screw 3 and nut 4
Reduced levels are maintained, while preferable lubricant effect between lead screw 3 and nut 4 can be kept.The present embodiment takes full advantage of
Relative motion mode between lead screw 3 and nut 4, it is effectively evenly dispersed to injecting the oil progress of oil pocket, reach lubricant effect
Valence than optimization.
In the present embodiment, nut 4 is located at one end of oil pocket, and the other end of oil pocket is provided with closure member, and oil pocket is located at inner tube 2
Interior, nut 4 and closure member close off the both ends of oil pocket.Nut 4 is left side 41 close to the one side of closure member, and nut 4 is separate
The one side of closure member is right side 42, and inner via hole is between closure member and left side 41.
Referring to Fig. 1, nut 4 is integrally fixed at one end of inner tube 2 under normal conditions, and in the present embodiment, nut 4 is fixed on interior
The right end of pipe 2.Left side 41 and the right end of oil pocket overlap at this time, and left side 41 is the right end of oil pocket, and nut 4 is to oil pocket
Right end play the role of it is closed.After nut 4 is mounted on lead screw 3, the right end of oil pocket is completely enclosed.Similarly, closure member is set
The left end in oil pocket is set, while closure member is located in inner tube 2 (end for being not limited to inner tube 2), to play to the left end of oil pocket
Sealing process.Just there is no the entrances of other oil other than inner via hole for entire oil pocket at this time.Nut 4 and closure member phase interworking
It closes so that the oil in oil pocket can obtain the preservation of long period, and the oil reduced in oil pocket outflows out of oil pocket.
Further, since closure member and nut 4 coordinate so that oil pocket is located at as the space of a relative closure in inner via hole
In the case of between closure member and left side 41, to inner via hole oiling, oil could be made to be in the oil pocket of relative closure, ensured
Oil can certainly spread all over lead screw when 4 relative motion of lead screw 3 and nut.If inner via hole is located at the right side of right side 42, pass through
The oil of inner via hole injection is fallen into the structure of a non-close, even if a large amount of oilings can not ensure that enough oil falls on lead screw
On 3, realize that lubrication mesh generates obstruction between lead screw 3 and nut 4.
Preferably, closure member is spacing ring 8, spacing ring 8 is mounted on lead screw 3.In the present embodiment, spacing ring 8 is not only
It is capable of the left end of oil closed cavity, additionally it is possible to hard position-limiting action be played to position of the nut 4 in the axial upper activity of lead screw 3, simultaneously
Spacing ring 8 can prevent lead screw 3 from being contacted with the inner wall of inner tube 2 in rotation process.
Opposite with the structure of spacing ring 8, lead screw 3 includes the smooth section 31 being fixed to each other and transmission segment 32.Transmission segment 32
Outer wall is provided with screw thread, so that being threadedly coupled between nut 4 and transmission segment 32, to make the inner wall and transmission segment 32 of nut 4
Outer wall between seal.The outer wall of smooth section 31 is smooth, so that the inner wall of spacing ring 8 is fitted on the outer wall of smooth section 31,
To make to be sealed between the inner wall of spacing ring 8 and the outer wall of smooth section 31.In addition, the outer wall and nut 4 of spacing ring 8 are in left side
Outer wall at 41 is fitted on the inner wall of inner tube 2, so that being sealed between the outer wall of spacing ring 8 and the inner wall of inner tube 2, simultaneously
So that being sealed between the outer wall and the inner wall of inner tube 2 of nut 4, left end and the right end sealing of oil pocket are ensure that really, to ensure
Oil pocket is other than inner via hole without other entrance and exits.
Preferably, the quantity of inner via hole is two or more.All inner via holes can uniformly be set along the circumferential direction of inner tube 2
It sets.When carrying out oiling to one or more inner via hole, ensure at least one inner via hole during oiling with the outside of inner tube 2
Air communication so that there is no draught heads with 2 outside of inner tube inside oil pocket, reduce the generation that can not carry out oiling conditions.
In the present embodiment by taking the quantity of inner via hole is two as an example, two inner via holes are respectively upper inner via hole 21 and lower interior logical
Hole 22, upper inner via hole 21 and lower inner via hole 22 along inner tube 2 radially symmetrically setting in inner tube 2.Lower inner via hole 22 is carried out
In refueling process, oily chamber air is discharged from upper inner via hole 21, is communicated with the air at inner via hole 22, forms a relative flow
Ventilation device.
In addition, the electric pushrod of Refuel structure further includes outer tube 1 in the present embodiment, inner tube 2 is set in outer tube 1, lead screw 3
It is fixed with outer tube 1.Drive inner tube 2 and 1 relative motion of outer tube when 4 relative motion of lead screw 3 and nut, inner tube 2 and outer tube 1 it is opposite
The direction of motion is the axial direction of lead screw 3.
Accessibke porosity 11 is offered on outer tube 1,22 inside of lower inner via hole and accessibke porosity form filling passage between 11 outside, add
Oily channel is used for from 11 outside of accessibke porosity to oil pocket oiling, and accessibke porosity 11 is used for 22 oiling of downward inner via hole.The present embodiment China and foreign countries
When through-hole 11 is penetrated through with lower inner via hole 22,11 downward inner via hole of accessibke porosity, 22 oiling.When one of accessibke porosity 11 and lower inner via hole 22
Be plugged or accessibke porosity 11 and lower inner via hole 22 between when being blocked, accessibke porosity 11 can not 22 oiling of inner via hole downwards.
In the present embodiment, one pull head 10 is installed in the left end of outer tube 1.Pull head 10 includes a left end for being plugged on inner tube 2
Internal plug division 101, is sealed the left end of inner tube 2 by plug division 101.
In general, there are gaps between outer tube 1 and inner tube 2, in order to enable formation one is relatively close between outer tube 1 and inner tube 2
The environment of envelope, can be arranged a clamping ring 9 between inner tube 2 and the inner wall of outer tube 1, clamping ring 9 is socketed in inner tube 2, blocks simultaneously
The outer wall for connecing ring 9 is fitted on the inner wall of outer tube 1.By inner tube 2, plug division 101 and clamping ring 9, outer tube 1 is realized in cooperation jointly
Left end sealing.
For this outer nut 4 in order to be fixed in inner tube 2, nut 4 exposes to inner tube 2 close to the part of right side 42, to realize
The snap action of nut 4 and inner tube 2.It is exposed in nut 4 on the outer wall of the part of inner tube 2 and is socketed with sealing ring 6, sealing ring 6
Outer wall be fitted on the inner wall of outer tube 1, by lead screw 3, nut 4 and 6 three of sealing ring coordinate, realize the right side of outer tube 1
The sealing at end.
In the present embodiment, the left end of outer tube 1, spacing ring 8, nut 4 and outer tube 1 right end set gradually, therefore it is no matter outer
How is mutual spacing between the left end of pipe 1, spacing ring 8, nut 4 and outer tube 1, and the left end of outer tube 1 is outer tube 1 and spacing ring
8 adjacent one end.
In order to accurately be injected oil into lower inner via hole 22 by accessibke porosity 11, it is arranged in the outer wall of inner tube 2 uses at this time
In the oil guide groove of 22 oiling of downward inner via hole.The installation form of oil guide groove can be both integrally formed with inner tube 2, can also fix peace
In inner tube 2, the form in inner tube 2 is fixedly mounted on using oil guide groove in the present embodiment.
Specifically, oil guide groove is arranged on a guide ring 5, oil guide groove is among 5 outer surface of guide ring along guide ring 5
Radially-inwardly recess is formed, and the edge of 5 outer surface of guide ring then becomes the cell wall 53 of the oil guide groove at this time.In the diameter of guide ring 5
Upwards, the medial surface of oil guide groove is the slot bottom 54 of oil guide groove, and the lateral surface of oil guide groove is the notch of oil guide groove.Table in guide ring 5
Along one bulge loop 55 of the radially inwardly projecting formation of guide ring 5 among face.In addition, offering hole 51 and lower opening on slot bottom 54
52。
Opposite, an annular groove 23 is offered in inner tube 2, bulge loop 55 matches with 23 shape of annular groove, so that bulge loop
It can not be generated between annular groove 23 after in 55 installation to annular grooves 23 along the axial relative displacement of inner tube 2.Meanwhile upper hole 51 with
Upper inner via hole 21 penetrates through, lower opening 52 and the perforation of lower inner via hole 22.After guide ring 5 is mounted in annular groove 23, the slot bottom of oil guide groove
54 i.e. on the outer wall of inner tube 2, and accessibke porosity 11 is for the notch oiling to oil guide groove, and the inner wall of outer tube 1 is for sealing Oil Guide
The notch of slot, while the inner wall of outer tube 1 and cell wall 53 are bonded to each other so that oil is limited in oil guide groove when 11 oiling of accessibke porosity
In.It will produce relative movement between inner tube 2 and outer tube 1, by controlling the relative position of inner tube 2 and outer tube 1, control accessibke porosity 11
Whether penetrated through with the notch of oil guide groove.
When non-oiling, under accessibke porosity 11 not the notch connection situation with oil guide groove, due to the inner wall and cell wall 53 of outer tube 1
It is bonded to each other, the inner wall of outer tube 1 is fully sealed the notch of oil guide groove, and accessibke porosity 11 can not be to oil guide groove oiling, and then without normal direction
Lower 22 oiling of inner via hole, while the oil in inner tube 2 will not be leaked out from accessibke porosity 11.At this point, the inner wall of outer tube 1, oil guide groove and oil
Chamber three forms a closed structure.
Under the notch connection situation of accessibke porosity 11 and oil guide groove, you can by accessibke porosity 11 to being noted in oil guide groove
Oil, and then to 22 oiling of lower inner via hole.Additionally due to the inner wall of outer tube 1 and the cell wall 53 of oil guide groove cooperate and seal, limit
The oil injected from accessibke porosity 11 injects 22 this mode of lower inner via hole by oil guide groove, without flow into inner tube 2 and outer tube 1 it
Between other positions in addition to oil guide groove, realize accurate oiling in oil pocket.
Preferably, oil guide groove is an endless groove, oil guide groove is coaxially disposed with inner tube 2.At this point, oil guide groove penetrates through extremely simultaneously
Upper inner via hole 21 and lower inner via hole 22 are lower interior logical since there are gaps between the slot bottom 54 and the inner wall of outer tube 1 of oil guide groove
The air being discharged out of oil pocket when 22 oiling of hole can leave from upper inner via hole 21, then flow to lower inner via hole via oil guide groove
At 22, oil pocket is interior identical with air pressure in oil guide groove during ensureing oiling.At this point, the electric pushrod of the present embodiment can be used as
The solar energy push rod of outdoor application, is adapted to the requirement of higher degree of protection.
Sealing element is provided in the present embodiment in filling passage, sealing element is connected with return unit, and return unit is for making sealing
Part blocks filling passage.When non-oiling, sealing element blocks filling passage under return unit effect, and then can not be outside accessibke porosity 11
Side is to oil pocket oiling, and when oiling, sealing element overcomes return unit to act on so that filling passage is unimpeded, enable a user to from
11 outside of accessibke porosity is to oil pocket oiling.
In addition, carrying out oiling by accessibke porosity 11 for convenience of control, fuel filler neck 7 can be set on accessibke porosity 11, refueled
The mouthpiece of mouth 7 is located at the outside of accessibke porosity 11 so that user by fuel filler neck 7 to 11 oiling of accessibke porosity.
In the present embodiment, sealing element is set in fuel filler neck 7, the mouthpiece that return unit is used to that sealing element to be made to block fuel filler neck 7.
When non-oiling, sealing element blocks the mouthpiece of fuel filler neck 7 under return unit effect so that the mouthpiece of fuel filler neck 7 can not it is fuel-displaced or
Person's oiling, so that electric pushrod inner sealing.When oiling, sealing element oil pressure effect under overcome return unit effect leave plus
The mouthpiece of oil nozzle 7 is moved towards inner tube 2, so that the mouthpiece of fuel filler neck 7 and lower inner via hole 22 are mutually communicated.
Pay attention to controlling oil pressure when oiling, or rationally designs mouthpiece, accessibke porosity 11 and the sealing element three's shape of fuel filler neck 7
Relationship ensures that sealing element will not block accessibke porosity 11 when oiling.
Preferably, return unit is spring, sealing element is steel ball.Steel ball can be fixed on one end of spring, spring
The other end is fixed on the inner wall of fuel filler neck 7 or the outer wall of outer tube 1.Steel ball is used to block the mouthpiece of fuel filler neck 7, steel ball and bullet
Spring is respectively positioned in fuel filler neck 7.
Under non-oiling conditions, steel ball blocks the mouthpiece of fuel filler neck 7 in fuel filler neck 7 under the action of the spring, when oiling, steel ball
Overcome spring force to leave the mouthpiece of fuel filler neck 7 to move towards inner tube 2, at the same control oil pressure, accessibke porosity 11 geomery and
The geomery of steel ball ensures that steel ball will not block accessibke porosity 11.The space of steel ball and spring is limited in always at this time
In fuel filler neck 7.At this time since spring structure is simple, small volume, so can be installed in fuel filler neck 7 while not interfere with oil
Flowing.In addition steel ball and spring does not interfere with the relative motion between inner tube 2 and outer tube 1.
Embodiment 2.
Without oil guide groove, this outside seal is set in this present embodiment in place of the difference of the present embodiment and embodiment 1
Between the inner wall of outer tube and the outer wall of inner tube, return unit is for making sealing element block accessibke porosity.
Under non-oiling state, sealing element return unit effect under block accessibke porosity so that accessibke porosity can not it is fuel-displaced or
Person's oiling, so that outer tube seals.When oiling, sealing element overcomes return unit to act under oil pressure effect, leaves outer logical
Hole is moved towards inner tube, so that lower inner via hole and accessibke porosity are mutually communicated so that accessibke porosity being capable of oiling.Pay attention to controlling when oiling
Liquefaction pressure, or lower both inner via hole and sealing element shape relation is rationally designed, ensure that sealing element will not be blocked in lower when oiling
Through-hole.
Preferably, return unit is spring, sealing element is steel ball.Steel ball can be fixed on one end of spring, spring
The other end is fixed on the inner wall of fuel filler neck or the inner wall of outer tube.Under non-oiling conditions, steel ball is under the action of the spring in outer tube
Inner wall block accessibke porosity, when oiling, steel ball overcomes spring force to leave accessibke porosity towards movement of inner pipe.Sealing element at this time
The relative movement of inner and outer tubes is not interfered with return unit.
Embodiment 3.
It is that sealing element is set in oil pocket in place of the present embodiment and the difference of embodiment 1, return unit is for making sealing element
Block lower inner via hole.
Under non-oiling state, sealing element blocks lower inner via hole under return unit effect, so that lower inner via hole can not go out
Oil or oiling, if not upper inner via hole, oil pocket is sealed at this time.When oiling, sealing element overcomes reset under oil pressure effect
Part acts on, and leaves lower inner via hole, so that the mouthpiece of fuel filler neck and the perforation of lower inner via hole so that lower inner via hole being capable of oiling.
Preferably, return unit is spring, sealing element is steel ball.Steel ball can be fixed on one end of spring, spring
The other end is fixed on the inner wall of inner tube.Under non-oiling conditions, steel ball blocks lower inner via hole in oil pocket under the action of the spring, note
When oily, the axis that steel ball overcomes spring force towards inner tube moves.
Limiting device and lower inner via hole position that the electric pushrod with Refuel structure is rationally set are needed at this time, so that
Spring will not have an impact the relative motion of lead screw and nut with steel ball.
Embodiment 4.
It is in place of the difference of the present embodiment and embodiment 1 between the inner wall of outer tube and the notch of oil guide groove in the presence of between ventilation
Gap, while airspace size is smaller.Accessibke porosity is opposite with the notch of oil guide groove penetrate through when, from accessibke porosity inject oil still
Major part can enter oil guide groove, hence into oil pocket.
Air can keep air pressure consistent so that oiling with air communication in outer tube in oil guide groove when the present embodiment oiling
Process can be more smooth.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but not limited to attached drawing and interior described in specific implementation mode above
Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the range of claims.
Claims (11)
1. a kind of electric pushrod with Refuel structure, including outer tube, inner tube, lead screw and the axial movably arranged along lead screw
Nut, nut are mounted on lead screw, and lead screw is set in inner tube, and inner tube is set in outer tube, and nut is mounted on the inner tube, special
Sign is：Oil pocket is formed between the inner wall and lead screw of inner tube, and accessibke porosity is offered on the side wall of outer tube, is opened up on the side wall of inner tube
There are inner via hole, inner via hole and oil pocket perforation, inner via hole to be used for oil pocket oiling.
2. the electric pushrod according to claim 1 with Refuel structure, it is characterised in that：The nut is located at oil pocket
The other end of one end, oil pocket is provided with closure member, and nut and closure member close off the both ends of oil pocket, and inner via hole is located at closure member
Between nut.
3. the electric pushrod according to claim 2 with Refuel structure, it is characterised in that：The closure member is limit
Ring, spacing ring are mounted on lead screw.
4. the electric pushrod according to claim 3 with Refuel structure, it is characterised in that：The lead screw includes mutually solid
Fixed smooth section and transmission segment, nut are threadedly coupled with transmission segment, and the inner wall of spacing ring is fitted on the outer wall of smooth section, limit
The outer wall of ring and the outer wall of nut are fitted on the inner wall of inner tube.
5. the electric pushrod according to claim 1 or 2 or 3 or 4 with Refuel structure, it is characterised in that：It is described interior logical
Filling passage is formed between on the inside of hole and on the outside of accessibke porosity, filling passage is used on the outside of accessibke porosity, to oil pocket oiling, refuel logical
Sealing element is provided in road, sealing element is connected with return unit, and return unit is for making sealing element block filling passage.
6. the electric pushrod according to claim 5 with Refuel structure, it is characterised in that：It is provided on the accessibke porosity
Fuel filler neck, fuel filler neck are used for accessibke porosity oiling, and for return unit for making sealing element block the mouthpiece of fuel filler neck, return unit is bullet
Spring, sealing element are fixed on spring, and spring and sealing element are respectively positioned in fuel filler neck, and the end of spring is fixed on the inner wall of fuel filler neck
Or on the outer wall of outer tube.
7. the electric pushrod according to claim 5 with Refuel structure, it is characterised in that：The sealing element is set to oil
Intracavitary, return unit is for making sealing element block inner via hole.
8. the electric pushrod according to claim 5 with Refuel structure, it is characterised in that：The outer wall of said inner tube is arranged
It is useful for the oil guide groove to inner via hole oiling, the slot bottom of oil guide groove is located on the outer wall of inner tube, the slot bottom and inner via hole of oil guide groove
Perforation, accessibke porosity is for the notch oiling to oil guide groove.
9. the electric pushrod according to claim 8 with Refuel structure, it is characterised in that：The quantity of the inner via hole is
Two or more, all inner via holes are connected to oil guide groove.
10. the electric pushrod according to claim 9 with Refuel structure, it is characterised in that：The inner wall of the outer tube is used
There are airspaces between the notch of sealing oil guide groove or the inner wall and the notch of oil guide groove of outer tube.
11. a kind of oiling method of electric pushrod with Refuel structure as described in claim 1-10 any claims,
It is characterized in that：Include the following steps：
Step is 1.：By accessibke porosity to inner via hole oiling, to make inner via hole to oil pocket oiling；
Step is 2.：The oil in oil pocket is driven to move when axially generating relative movement along lead screw between nut and lead screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810472100.2A CN108426012A (en) | 2018-05-17 | 2018-05-17 | A kind of electric pushrod and its oiling method with Refuel structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810472100.2A CN108426012A (en) | 2018-05-17 | 2018-05-17 | A kind of electric pushrod and its oiling method with Refuel structure |
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| CN108426012A true CN108426012A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810472100.2A Pending CN108426012A (en) | 2018-05-17 | 2018-05-17 | A kind of electric pushrod and its oiling method with Refuel structure |
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| CN109268658A (en) * | 2018-11-15 | 2019-01-25 | 徐州金港起重机制造有限公司 | A kind of push rod lubricating structure |
| CN110319166A (en) * | 2019-07-27 | 2019-10-11 | 绍兴市上虞荣达实业有限公司 | A kind of pusher structure |
| CN114649901A (en) * | 2022-03-24 | 2022-06-21 | 浙江微流纳米生物技术有限公司 | Circulating oil lubricated electric cylinder |
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