CN208457136U - A kind of electric pushrod with Refuel structure - Google Patents
A kind of electric pushrod with Refuel structure Download PDFInfo
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- CN208457136U CN208457136U CN201820733077.3U CN201820733077U CN208457136U CN 208457136 U CN208457136 U CN 208457136U CN 201820733077 U CN201820733077 U CN 201820733077U CN 208457136 U CN208457136 U CN 208457136U
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- screw rod
- via hole
- oiling
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Abstract
The utility model discloses a kind of electric pushrods with Refuel structure, belong to Linear transmission technical field, including outer tube, inner tube, screw rod and the axial active installation along screw rod nut, nut is mounted on screw rod, screw rod is set in inner tube, inner tube is set in outer tube, and nut is mounted on the inner tube, and forms oil pocket between the inner wall and screw rod 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 utility model has the advantage of oiling is carried out to oil pocket by inner via hole, so that grease supplement can be obtained between screw rod and nut.Simultaneously using the relative motion between screw rod and nut, so that screw rod and nut are able to drive grease movement, so that can remain the state of grease lubrication between screw rod and nut.
Description
[technical field]
The utility model relates to a kind of electric pushrods with Refuel structure, belong to Linear transmission technical field.
[background technique]
Electric pushrod is generally also linear actuators, and main operational principle is rotated by motor driven screw rod, screw rod
Upper setting transmission nut drives transmission nut to move back and forth when screw rod rotates.
Conventional electric pushrod can be added at one time appropriate grease before assembly 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 satisfy
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, screw rod and
The use demand that the grease initially added on nut is insufficient to allow solar energy push rod to reach 25 years, in solar energy push rod service life
The state of grease lubrication can not be remained in use process in range between screw rod and nut.
[utility model content]
It is provided the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art a kind of with oiling
The electric pushrod of structure, in electric pushrod use process, can periodically for electric pushrod fill grease, remain screw rod and
There is grease lubrication between nut.
Above-mentioned technical problem is solved, the utility model adopts the following technical solution:
A kind of electric pushrod with Refuel structure, including outer tube, inner tube, screw rod and along the axial active installation of screw rod
Nut, nut is mounted on screw rod, and screw rod 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 screw rod of pipe, and accessibke porosity is offered on the side wall of outer tube, offers inner via hole 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 and inner via hole penetrate through, by accessibke porosity to inner via hole oiling, so that oiling is carried out to oil pocket, so that
Grease supplement can be obtained between screw rod and nut.Simultaneously using the relative motion between screw rod and nut, so that screw rod and spiral shell
Mother is able to drive grease movement, so that can remain the state of grease lubrication between screw rod and nut.Using screw rod and
Nut relative motion drive grease movement mode make between screw rod and nut lubricate needed for grease amount be able to maintain that compared with
Low-level, while being able to maintain higher lubricant effect between screw rod and nut.
Nut described in the utility model is located at one end of oil pocket, and the other end of oil pocket is provided with closure member, nut and closing
Part closes off the both ends of oil pocket, and inner via hole is between closure member and nut.Oil pocket enters other than inner via hole without other
Mouth and outlet, so that the oil in oil pocket can obtain the preservation of long period, the oil reduced in oil pocket outflows out of oil pocket.
Closure member described in the utility model is stop collar, and stop collar is mounted on screw rod.Stop collar can be to nut in silk
Bar axially upper activity when position play hard position-limiting action, while stop collar can prevent screw rod during rotation with inner tube
Inner wall contact.
Screw rod described in the utility model includes the smooth section and transmission segment being fixed to each other, and nut is threadedly coupled with transmission segment,
The inner wall of stop collar is fitted on the outer wall of smooth section, and the outer wall of stop collar and the outer wall of nut are fitted in the inner wall of inner tube
On.The mode that nut is threadedly coupled with transmission segment to seal between the inner wall of nut and the outer wall of transmission segment, stop collar it is interior
The mode of wall fitting smooth section outer wall to seal between the inner wall of stop collar and the outer wall of smooth section.The outer wall and spiral shell of stop collar
The form for the inner wall inner wall that female outer wall is fitted in inner tube to seal between the outer wall of stop collar and the inner wall of inner tube, makes simultaneously
It obtains and is sealed between the outer wall of nut and the inner wall of inner tube, ensure that oil pocket does not have other entrances and gone out other than inner via hole really
Mouthful.
Filling passage is formed between on the inside of inner via hole described in the utility model and on the outside of accessibke porosity, filling passage is used for from outer
To oil pocket oiling on the outside of through-hole, it is provided with sealing element in filling passage, sealing element is connected with return unit, and return unit is for making to seal
Part blocks 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 pocket oiling, when oiling, sealing element overcomes return unit to act on, so that filling passage is unimpeded, enables a user to from outer
To oil pocket oiling on the outside of through-hole.
Fuel filler neck is provided on accessibke porosity described in the utility model, fuel filler neck is used for accessibke porosity oiling, and return unit is used for
Sealing element is set to block the mouthpiece of fuel filler neck, return unit is spring, and sealing element is fixed on spring, and spring and sealing element are respectively positioned on and add
In oil nozzle, the end of spring is fixed on the inner wall of fuel filler neck or the outer wall of outer tube.It, will by return unit under non-oiling state
Sealing element gets lodged in the mouthpiece of fuel filler neck, to realize that oil is sealed in electric pushrod.When oiling, sealing element passes through oil pressure counter
Return unit effect, so that the mouthpiece of fuel filler neck and inner via hole perforation, to realize to electric pushrod oiling.Spring structure is simple,
Small volume can be installed in fuel filler neck, while will not influence the flowing of oil.Furthermore spring and the sealing being located in fuel filler neck
Part will not influence the relative motion between inner and outer tubes.
Sealing element described in the utility model is set in oil pocket, and return unit is for making sealing element block inner via hole.Non- oiling
When, sealing element return unit effect under inner via hole is blocked on the inside of inner via hole so that inner via hole can not oil inlet or fuel-displaced, oiling
When, sealing element overcomes return unit effect to leave inner via hole, enables inner via hole oil inlet fuel-displaced.
The outer wall of inner tube described in the utility model is provided with for the oil guide groove to inner via hole oiling, the slot bottom position of oil guide groove
In on the outer wall of inner tube, the slot bottom and inner via hole of oil guide groove are penetrated through, and accessibke porosity is for the notch oiling to oil guide groove.Inner tube and outer
Relative movement can be generated between pipe, in accessibke porosity not and under oil guide groove alignment case, accessibke porosity can not to the accurate oiling of oil guide groove,
And then it can not be to the accurate oiling of inner via hole.And when inner tube and outer tube relative motion are to specific position, so that accessibke porosity alignment perforation
It, can be by accessibke porosity to carrying out accurate oiling in oil guide groove, and then to the accurate oiling of inner via hole to the notch of oil guide groove.
The quantity of inner via hole described in the utility model is two or more, and all inner via holes are connected to oil guide groove.To one
Inner via hole carries out oiling, the air in oil pocket by the air communication in remaining inner via hole and oil guide groove so that in oil pocket and
There is no draught head between oil guide groove, keep the oiling process to oil pocket more smooth.
The inner wall of outer tube described in the utility model is used to seal the notch of oil guide groove.Accessibke porosity not with the notch of oil guide groove
Under alignment case, 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, outer logical
When hole is directed at perforation with the notch of oil guide groove, the grease of accessibke porosity injection can be fully flowed into oil guide groove, to fully flow into
In oil pocket.
There are airspaces between the inner wall of outer tube described in the utility model and the notch of oil guide groove.Airspace size compared with
Small, air can keep air pressure consistent, enable oiling process more suitable with air communication in outer tube in oil guide groove when oiling
Freely, while not accurate oiling of the accessibke porosity to oil guide groove is influenced.
It is sealed between the inner wall of nut and outer tube described in the utility model, the outer tube one end sealing adjacent with closure member.It should
Structure makes the structure that a relative closure is formed between outer tube and inner tube.
A kind of oiling method of the electric pushrod with Refuel structure, includes the following steps: through accessibke porosity to inner via hole
Oiling, to drive the oil in oil pocket to move when axially generating relative movement along screw rod between nut and screw rod oil pocket oiling.
In such a way that nut and screw rod relative movement drive oil mobile, so that the lubricant effect between nut and screw rod is the most uniform,
Loss simultaneously for oil is also smaller.
When the utility model does not carry out oiling, sealing element blocks the mouthpiece of fuel filler neck by spring force；To fuel filler neck into
When row oiling, sealing element leaves the mouthpiece of fuel filler neck under oil pressure effect.Sealing element and the mode of spring cooperation control fuel filler neck
Oil inlet whether, it is final to control inner tube oil inlet.
Other features and advantages of the utility model will the detailed exposure in following specific embodiment, attached drawing.
[Detailed description of the invention]
The utility model is described further with reference to the accompanying drawing:
Fig. 1 is electric pushrod schematic diagram of main cross-sectional structure that the utility model embodiment 1 has Refuel structure；
Fig. 2 is the right view schematic cross-sectional view of electric pushrod that the utility model embodiment 1 has Refuel structure；
Fig. 3 is the electric pushrod configuration schematic diagram that the utility model embodiment 1 has Refuel structure.
[specific embodiment]
The technical solution of the utility model embodiment is explained below with reference to the attached drawing of the utility model embodiment and
Illustrate, but following embodiments are only the preferred embodiment of the utility model, and not all.Based on the implementation example in the implementation mode,
Those skilled in the art's obtained other embodiments without making creative work, belong to the utility model
Protection scope.
In the following description, occur term "inner", "outside", "upper", "lower", the indicating positions such as "left", "right" or
Positional 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 that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because
This should not be understood as limiting the present invention.
Embodiment 1.
Referring to Fig. 1-3.
Present embodiments provide a kind of electric pushrod with Refuel structure, including screw rod 3, nut 4 and inner tube 2.Nut 4
It is threaded on screw rod 3, so that nut 4 can make a relative move along the axial direction of screw rod 3.Wherein, in screw rod 3 is set to
In pipe 2, nut 4 is set in inner tube 2, forms oil pocket between the inner wall and screw rod 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: through inner via hole to oil pocket
Oiling drives the oil in oil pocket to move between nut 4 and screw rod 3 when generation relative movement axial along screw rod 3.
The present embodiment carries out oiling to oil pocket by inner via hole, so that can obtain grease benefit between screw rod 3 and nut 4
It fills.Simultaneously because the axial relative movement along screw rod 3 can be generated between nut 4 and screw rod 3, therefore by injection oil pocket
Oil can guarantee screw rod 3 and nut 4 energy in relative movement as the relative movement of screw rod 3 and nut 4 is throughout screw rod 3
Enough remain the state of grease lubrication.In addition, can using the amount of grease needed for being lubricated between this mode screw rod 3 and nut 4
Reduced levels are maintained, while being able to maintain preferable lubricant effect between screw rod 3 and nut 4.The present embodiment takes full advantage of
Relative motion mode between screw rod 3 and nut 4, it is effectively evenly dispersed to the oil progress of injection oil pocket, reach lubricant effect
The optimization of valence ratio.
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 the one end for being fixed on 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 screw rod 3, the right end of oil pocket is completely enclosed.Similarly, closure member is set
It sets in the left end of oil pocket, 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, the oil reduced in oil pocket outflows out of oil pocket.
Further, since closure member and nut 4 cooperate so that space of the oil pocket as a relative closure, is located in inner via hole
In the case where 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, guaranteed
Oil can be certainly throughout screw rod when 4 relative motion of screw rod 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 screw rod
On 3, hinder realizing that lubrication mesh generates between screw rod 3 and nut 4.
Preferably, closure member is stop collar 8, stop collar 8 is mounted on screw rod 3.In the present embodiment, stop collar 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 screw rod 3, simultaneously
Stop collar 8 can prevent screw rod 3 from contacting during rotation with the inner wall of inner tube 2.
Opposite with the structure of stop collar 8, screw rod 3 includes the smooth section 31 and transmission segment 32 being fixed to each other.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 stop collar 8 is fitted on the outer wall of smooth section 31,
To make to seal between the inner wall of stop collar 8 and the outer wall of smooth section 31.In addition, the outer wall and nut 4 of stop collar 8 are in left side
Outer wall at 41 is fitted on the inner wall of inner tube 2, so that sealing between the outer wall of stop collar 8 and the inner wall of inner tube 2, simultaneously
So that sealing between the outer wall of nut 4 and the inner wall of inner tube 2, left end and the right end sealing of oil pocket ensure that really, to guarantee
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, guarantee at least one inner via hole during oiling and on the outside of inner tube 2
Air communication reduce the generation that can not carry out oiling conditions so that there is no draught heads with the outside of inner tube 2 inside oil pocket.
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, communicates 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, screw rod 3
It is fixed with outer tube 1.Drive inner tube 2 and 1 relative motion of outer tube when 4 relative motion of screw rod 3 and nut, inner tube 2 and outer tube 1 it is opposite
The direction of motion is the axial direction of screw rod 3.
Accessibke porosity 11 is offered on outer tube 1, is formed filling passage between lower 22 inside of inner via hole and 11 outside of accessibke porosity, is added
Oily channel is used for from 11 outside of accessibke porosity to oil pocket oiling, and accessibke porosity 11 is used for downward 22 oiling of inner via hole.The present embodiment China and foreign countries
When through-hole 11 and lower inner via hole 22 penetrate through, downward 22 oiling of inner via hole of accessibke porosity 11.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 by left end of the plug division 101 to inner tube 2.
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 set 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.Sealing ring 6, sealing ring 6 are socketed on the outer wall that nut 4 exposes to the part of inner tube 2
Outer wall be fitted on the inner wall of outer tube 1, by screw rod 3, nut 4 and 6 three of sealing ring cooperate, realize the right side of outer tube 1
The sealing at end.
In the present embodiment, the left end of outer tube 1, stop collar 8, nut 4 and outer tube 1 right end set gradually, therefore regardless of outer
How is mutual spacing between the left end of pipe 1, stop collar 8, nut 4 and outer tube 1, and the left end of outer tube 1 is outer tube 1 and stop collar
8 adjacent one end.
In order to accurately be injected oil by accessibke porosity 11 to lower inner via hole 22, it is arranged in the outer wall of inner tube 2 uses at this time
In the oil guide groove of downward 22 oiling of 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
The relative displacement axial along inner tube 2 can not be generated after in 55 installations to annular groove 23 between annular groove 23.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.Relative movement can be generated 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.
It, can be by accessibke porosity 11 to being infused in oil guide groove under the notch connection situation of accessibke porosity 11 and oil guide groove
Oil, and then to lower 22 oiling of 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 lower this mode of inner via hole 22 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 and inner tube 2 are coaxially disposed.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 of oil guide groove and the inner wall of outer tube 1
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 guaranteeing 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 to seal
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 passes through 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 mobile 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 guarantees 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 guarantees 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 will not influence oil
Flowing.Furthermore steel ball and spring will not influence 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 mobile towards inner tube, so that lower inner via hole and accessibke porosity are mutually communicated, enables accessibke porosity oiling.Pay attention to controlling when oiling
Liquefaction pressure, or lower both inner via hole and sealing element shape relation is rationally designed, guarantee 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
It will not influence the relative movement of inner and outer tubes with return unit.
Embodiment 3.
It is that sealing element is set in oil pocket in place of the difference of the present embodiment and 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 effect, leaves lower inner via hole, so that the mouthpiece of fuel filler neck and the perforation of lower inner via hole, enable lower inner via hole 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 is mobile.
It needs that the limiting device with the electric pushrod of Refuel structure and lower inner via hole position is rationally arranged at this time, so that
Spring will not have an impact the relative motion of screw rod and nut with steel ball.
Embodiment 4.
It is between the inner wall of outer tube and the notch of oil guide groove in place of the difference of the present embodiment and embodiment 1 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 is able to 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.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, being familiar with the those skilled in the art should be understood that the utility model includes but is not limited to attached drawing and specific embodiment party above
Content described in formula.The modification of any function and structure principle without departing from the utility model is intended to be included in claims
Range in.
Claims (10)
1. a kind of electric pushrod with Refuel structure, including outer tube, inner tube, screw rod and along the axial active installation of screw rod
Nut, nut are mounted on screw rod, and screw rod is set in inner tube, and inner tube is set in outer tube, and nut is mounted on the inner tube, special
Sign is: forming oil pocket between the inner wall and screw rod of inner tube, accessibke porosity is offered on the side wall of outer tube, is opened up on the side wall of inner tube
There is inner via hole, inner via hole and oil pocket perforation, inner via hole are 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
One end, the other end of oil pocket are 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, stop collar are mounted on screw rod.
4. the electric pushrod according to claim 3 with Refuel structure, it is characterised in that: the screw rod includes mutually solid
Fixed smooth section and transmission segment, nut are threadedly coupled with transmission segment, and the inner wall of stop collar 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: 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 refuel logical to oil pocket oiling
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: be 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
There is the oil guide groove for inside through-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 of outer tube and the notch of oil guide groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820733077.3U CN208457136U (en) | 2018-05-17 | 2018-05-17 | A kind of electric pushrod with Refuel structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820733077.3U CN208457136U (en) | 2018-05-17 | 2018-05-17 | A kind of electric pushrod with Refuel structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426012A (en) * | 2018-05-17 | 2018-08-21 | 浙江捷昌线性驱动科技股份有限公司 | A kind of electric pushrod and its oiling method with Refuel structure |
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2018
- 2018-05-17 CN CN201820733077.3U patent/CN208457136U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426012A (en) * | 2018-05-17 | 2018-08-21 | 浙江捷昌线性驱动科技股份有限公司 | A kind of electric pushrod and its oiling method with Refuel structure |
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