CN109854748A - A kind of waterproof seal electric pushrod - Google Patents
A kind of waterproof seal electric pushrod Download PDFInfo
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- CN109854748A CN109854748A CN201910277807.2A CN201910277807A CN109854748A CN 109854748 A CN109854748 A CN 109854748A CN 201910277807 A CN201910277807 A CN 201910277807A CN 109854748 A CN109854748 A CN 109854748A
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- lip
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- 238000007789 sealing Methods 0.000 claims abstract description 184
- 230000000903 blocking effect Effects 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 4
- 108091006146 Channels Proteins 0.000 description 51
- YAFQFNOUYXZVPZ-UHFFFAOYSA-N liproxstatin-1 Chemical compound ClC1=CC=CC(CNC=2C3(CCNCC3)NC3=CC=CC=C3N=2)=C1 YAFQFNOUYXZVPZ-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 238000001704 evaporation Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The present invention discloses a kind of waterproof seal electric pushrod, belong to electric pushrod technical field, including the outer tube being mutually arranged and inner tube, one end of the outer tube is provided with end cap, the end cap includes the end cap seat being fixedly connected with outer tube, be provided with the through-hole passed through for inner tube on the end cap seat, the through-hole include extend from one end close to outer tube to one end far from outer tube and bore increased through-hole two and through-hole one, the through-hole two are connected with through-hole one and form cascaded surface in junction one by one.The present invention is sealed by the way that multi-sealed part is arranged between inner tube, outer tube, it can guarantee the leakproofness of the telescopic end of electric pushrod, and sealing element is pre-tightened by adjustable form, tightness between sealing element and inner tube can be adjusted, can aging to sealing element, abrasion compensate, to extend the service life of electric pushrod.
Description
Technical field
The present invention relates to electric pushrod technical field more particularly to a kind of waterproof seal electric pushrods.
Background technique
Electric pushrod is that a kind of straight reciprocating motion that the rotary motion of motor is changed into push rod is driven by electricity dress
It sets, can be used for as mechanical use is executed in various simple or complicated process flow, to realize far distance control, centralized control
Or automatically control, because with stationarity is good, running precision is high, the advantage of fast response time is widely used, each
It is widely applied in class electromechanics complete set of equipments and its automatic control device.
When electric pushrod at work, inner tube needs to carry out axial sliding along outer tube, in order to guarantee telescopic rod just
Often operation needs to guarantee the leakproofness of telescopic rod, prevents dust impurities from entering the inside of telescopic rod, needs to be arranged to telescopic rod
It is sealed processing.In order to guarantee the leakproofness between end cap and outer tube, the mode that can be connected through a screw thread is fixedly connected outside
One end of pipe, and the mode for filling thread locking adhesive between the threads is sealed, this kind of processing mode can guarantee good
Leakproofness.In order to guarantee the leakproofness between inner tube and end cap, needs that sealing ring is arranged between inner tube and end cap and is sealed,
This kind of simple sealing structure can guarantee electric pushrod reliability service in clean indoor environment, but electric pushrod needs
It will be in severe outdoor environment for a long time in use, extraneous environment can be to close between electric pushrod adjustable pipe and outer tube
Sealing generates aging, damage, and the leakproofness of electric pushrod declines, and limits the scope of application and environment of electric pushrod.Example
Such as, in photovoltaic industry, electric pushrod needs to be exposed in outdoor environment for a long time, the environment such as rainwater, sand and dust
Factor can remain that it is necessary to have good sealing performances in the inner tube of electric pushrod and sealing element end face, can guarantee electricity
The normal operation of dynamic push rod.
Reciprocal friction can be generated between sealing element and inner tube, the inner ring of sealing element can generate certain abrasion, so that electric
Dynamic push rod leads to the problem of leakproofness decline in use for some time；And over time, rainwater can be deposited on sealing
The surface of part forms water storage tank between end cap, sealing element and inner tube especially when the movable end of electric pushrod is installed upward,
Ponding stockpiles the aging for wherein aggravating sealing element for a long time, can further impact to the leakproofness of electric pushrod, these are asked
Topic has seriously limited the use environment and application range of electric pushrod.
Summary of the invention
The purpose of the present invention is to solve the problems in background technique, and a kind of waterproof seal for proposing is electronic pushes away
Bar.
To achieve the goals above, present invention employs following technical solutions:
A kind of waterproof seal electric pushrod, including the outer tube being mutually arranged and inner tube, one end of the outer tube is provided with
End cap, the end cap include the end cap seat being fixedly connected with outer tube, are provided with the through-hole passed through for inner tube on the end cap seat,
The through-hole includes extending from one end close to outer tube to one end far from outer tube and bore increased through-hole two and through-hole one by one
One, the through-hole two be connected with through-hole one and junction formed cascaded surface, the through-hole one be internally provided with for pair
The first seal that inner tube and through-hole one seal is provided on the through-hole one and moves for limiting first seal to outer tube side
Dynamic locating piece, the through-hole two are internally provided with for the second seal to inner tube and the sealing of through-hole two, the end cap
It further include for limiting second seal to the block piece far from outer tube direction one end, the outer wall of said inner tube, second seal
End face and block piece between form accommodating chamber, the end cap seat further includes that the draining for ponding to be discharged from accommodating chamber is led to
Road.
As preferred: one end of the drainage channel is connected to accommodating chamber, and the other end is connected to the lateral wall of end cap seat, institute
It states during drainage channel extends from the one end being connected to accommodating chamber to the one end being connected to end cap seat lateral wall to outer tube side
Inclination.
As preferred: the block piece include for limit second seal to far from outer tube direction one end blocking portion and
For adjusting the interconnecting piece of distance between blocking portion, cascaded surface, the interconnecting piece is threaded on end cap seat, the end cap seat
Outside be provided with external screw thread, be provided on the interconnecting piece and the mutually matched internal screw thread of the external screw thread, the internal screw thread
It is mutually assembled to form screw connection structure with external screw thread, the internal screw thread and externally threaded axis are parallel with the axis of inner tube.
As preferred: the second seal includes oil sealing two, and the first seal includes oil sealing one and dustband, institute
It states oil sealing one, dustband and oil sealing two to be arranged on inner pipe, and is interference fitted with inner tube, the dustband is arranged in oil sealing one
Between oil sealing two.
As preferred: the drainage channel includes the drainage channel one being formed on blocking portion and is formed on interconnecting piece
Drainage channel two, the drainage channel one, drainage channel two are interconnected, and the drainage channel one includes being arranged on blocking portion
Slot close to two side of oil sealing, the notch side of the slot and the end face of oil sealing two are bonded to each other to form drainage channel one, described
Drainage channel two is the through-hole that interconnecting piece side is arranged in, and one end of the through-hole is connected to the lateral wall of interconnecting piece, the other end
To interconnecting piece internal stretch and be connected to accommodating chamber.
As preferred: the drainage channel two is formed with draining inclined-plane close to the side of outer tube, and the draining inclined-plane is from row
Aquaporin one tilts during extending to the lateral wall of drainage channel two to outer tube side.
As preferred: the thickness of the oil sealing two is greater than the depth of through-hole two, the oil sealing one, dustband, oil sealing two
The sum of thickness is greater than the sum of through-hole, the depth of through-hole two.
As preferred: be provided with sealing lip one and sealing lip two on the inner ring of the oil sealing one, the sealing lip one with it is interior
Interference degree, the sealing lip two of pipe are equal with the interference degree of inner tube, are provided on the inner ring of the dustband close to the close of oil sealing one
Lip three and the dustproof lip one far from oil sealing one are sealed, the dustproof lip one is less than the mistake of sealing lip two and inner tube with the interference degree of inner tube
Degree of being full of, the sealing lip three are less than the interference degree of dustproof lip one and inner tube with the interference degree of inner tube, on the inner ring of the oil sealing two
It is provided with the sealing lip four close to dustband and the dustproof lip two far from dustband, the sealing lip four, dustproof lip two and inner tube
Interference degree be respectively less than the interference degree of sealing lip two Yu inner tube.
As preferred: groove is provided on the end face of oil sealing one on the dustband, close to anti-on the oil sealing one
Connection ring for being inserted into trench interiors is set on the end face of konisphere, and the outside of the dustproof lip one is to incline to one inner ring of dustproof lip
Oblique tapered surface, the sealing lip four are equipped with the connection inclined-plane for being set in dustproof lip one, the shape on the connection inclined-plane
Shape and the tapered surface cooperate.
As preferred: the locating piece is the annular retaining ring of forming on that inner wall of the through hole, and the internal diameter of the annular retaining ring is big
In the outer diameter of inner tube.
Compared with prior art, the present invention has the advantages that
It is sealed by the way that multi-sealed part is arranged in the inside of end cap seat, since first seal and second seal are adopted
It is sealed with two groups of independent forms between inner tube and end cap seat, when can guarantee wherein one group of seal fails damage,
Another group of sealing element can continue to keep work, to guarantee the leakproofness of electric pushrod movable end；Pass through locating piece, block piece
Two groups of barrier structures position first seal, second seal, form certain sealing area, and sealing element is able to maintain
In determining region, prevent inner tube from generating offset to the position of sealing element in telescopic process.
Due to the outer wall of inner tube, second seal end face and block piece between form accommodating chamber, when in electric pushrod
For pipe when installing upward, accommodating chamber forms upward structure, when rainwater or other splashings are fallen into accommodating chamber, can not arrange in time
Out, moisture can only lean on the mode of natural evaporation to leave, and ponding can be accumulated in persistently in accommodating chamber, and long-term so to influence, this is close
Easily occur water leakage situation at sealing, influences the service life of electric telescopic rod.
By the way that drainage channel is arranged on end cap seat, the moisture inside accommodating chamber can be discharged, prevent from holding by drainage channel
The ponding in chamber of receiving is deposited near the surface of oil sealing two and the junction of oil sealing two and inner tube, prevents prolonged ponding from soaking
Bubble generates aging, the especially junction of oil sealing two and inner tube to two surface of oil sealing, due to being interference fitted the relationship of mutual extrusion,
The inner ring of oil sealing two needs persistently to keep certain pressure, more sensitive to extraneous erosion.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of waterproof seal electric pushrod of the invention.
Fig. 2 is outer tube of the invention, inner tube, the schematic diagram of internal structure of end cap junction.
Fig. 3 is a kind of local explosion structure diagram of waterproof seal electric pushrod of the invention.
Fig. 4 is a kind of partial sectional view one of waterproof seal electric pushrod of the invention.
Fig. 5 is a kind of partial sectional view two of waterproof seal electric pushrod of the invention.
Fig. 6 is the structural schematic diagram of first seal and second seal of the invention.
Fig. 7 is the structural schematic diagram one of block piece of the invention.
Fig. 8 is the structural schematic diagram two of block piece of the invention.
In figure: 1, outer tube；2, inner tube；3, end cap seat；4, through-hole；5, through-hole one；6, through-hole two；7, locating piece；8, stop
Part；9, oil sealing one；10, dustband；11, oil sealing two；12, blocking portion；13, interconnecting piece；14, accommodating chamber；15, drainage channel；16,
Cascaded surface；17, drainage channel one；18, drainage channel two；19, inclined-plane is drained；20, sealing lip one；21, sealing lip two；22, close
Seal lip three；23, dustproof lip one；24, sealing lip four；25, dustproof lip two；26, connection ring；27, groove；28, inclined-plane is connected.
Specific embodiment
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-8, a kind of waterproof seal electric pushrod, including the outer tube 1 being mutually arranged and inner tube 2, the outer tube 1
One end be provided with end cap, the end cap includes the end cap seat 3 being fixedly connected with outer tube 1, is provided with and is used on the end cap seat 3
The through-hole 4 that inner tube 2 passes through, the through-hole 4 include from close to outer tube 1 one end to far from outer tube 1 one end extend and bore by
One increased through-hole 26 and through-hole 1, the through-hole 26 are connected with through-hole 1 and form cascaded surface 16, institute in junction
The first seal of through-hole 1 being internally provided with for sealing to inner tube 2 and through-hole 1 is stated, is provided on the through-hole 1
For limiting the first seal locating piece 7 mobile to 1 side of outer tube, the through-hole 26 is internally provided with for inner tube 2
The second seal sealed with through-hole 26, the end cap further include for limiting second seal to far from 1 direction one end of outer tube
Block piece 8, between the outer wall of said inner tube 2, the end face of second seal and block piece 8 formed accommodating chamber 14, the end cap
Seat 3 further includes the drainage channel 15 for ponding to be discharged from accommodating chamber 14.
In order to guarantee the leakproofness of electric pushrod, generally require using sealing structure between each structure of electric pushrod
It is sealed, so that electric pushrod can wait normal use under adverse circumstances outdoors；In order to guarantee the outer of electric pushrod
Gasket can be installed between pipe 1 and the driving mechanism of electric pushrod therebetween to be sealed；But for electric pushrod
Sealing between outer tube 1 and inner tube 2 is just relatively difficult, past due to needing to carry out between the outer tube 1 of electric pushrod, inner tube 2
Multiple sliding needs to guarantee still to be able to be sealed electric pushrod under motion state.For close between end cap and outer tube 1
Feng Xing, the mode that threaded connection can be used between end cap and outer tube 1 are attached, and close in the junction suitable screw thread of filling
Sealing is sealed, and certain sealing element is arranged between end cap and inner tube 2 and is sealed.
It is sealed by the way that a variety of sealing elements are arranged in the inside of end cap seat 3, due to first seal and second seal
It is sealed using two groups of independent forms between inner tube 2 and end cap seat 3, can guarantee wherein one group of seal fails damage
When, another group of sealing element can continue to keep work, to guarantee the leakproofness of electric pushrod movable end；Pass through locating piece 7, resistance
8 two groups of barrier structures of block piece position first seal, second seal, form certain sealing area, sealing element energy
It is enough maintained at determining region, prevents inner tube 2 from generating offset to the position of sealing element in telescopic process.
Due to forming accommodating chamber 14 between the outer wall of inner tube 2, the end face of second seal and block piece 8, work as electric pushrod
Inner tube 2 when installing upward, accommodating chamber 14 forms upward structure, when rainwater or other splashings are fallen into accommodating chamber 14,
It can not be discharged in time, moisture can only lean on the mode of natural evaporation to leave, and ponding can persistently accumulate in accommodating chamber 14, for a long time such as
This is influenced, and the generation of water leakage situation is easily occurred at the sealing element, is influenced the service life of electric telescopic rod.
By the way that drainage channel 15 is arranged on end cap seat 3, the moisture inside accommodating chamber 14 can be discharged for drainage channel 15,
The surface for preventing the ponding in accommodating chamber 14 to be deposited on oil sealing 2 11 and oil sealing 2 11 are prevented near the junction of inner tube 2
Prolonged ponding, which is impregnated, generates aging, the especially junction of oil sealing 2 11 and inner tube 2 to 2 11 surface of oil sealing, due to interference
Cooperate the relationship of mutual extrusion, the inner ring of oil sealing 2 11 needs persistently to keep certain pressure, more sensitive to extraneous erosion.
In another embodiment, one end of drainage channel 15 is connected to accommodating chamber 14, and the other end is outer with end cap seat 3
Side wall connection, drainage channel 15 extend process from the one end being connected to accommodating chamber 14 to the one end being connected to 3 lateral wall of end cap seat
It is middle to be tilted to 1 side of outer tube.
By using above-mentioned technical proposal, since drainage channel 15 has certain tilt angle, the activity of electric pushrod
When end is that one end of the stretching outer tube 1 of inner tube 2 is installed upward, it is sloped downwardly outside the angle of drainage channel 15, in accommodating chamber 14
The liquid such as ponding can be actively discharged along self weight, to ensure that the drainage effect of drainage channel 15.
In another embodiment, block piece 8 includes for limiting second seal to far from 1 direction one end of outer tube
Blocking portion 12 and interconnecting piece 13 for adjusting distance between blocking portion 12, cascaded surface 16, interconnecting piece 13 are threaded in end cap
On seat 3, the outside of end cap seat 3 is provided with external screw thread, is provided on interconnecting piece 13 and the mutually matched internal screw thread of external screw thread, interior spiral shell
Line and external screw thread are mutually assembled to form screw connection structure, and internal screw thread and externally threaded axis are parallel with the axis of inner tube 2.
By using above-mentioned technical proposal, block piece 8 can be along the axial direction tune of outer tube 1 using movable structure
Whole, the screw connection structure between block piece 8, end cap seat 3 can convert axial moving distance for axial rotational structure,
The distance between block piece 8 and cascaded surface 16 are adjusted by way of rotation.When oil sealing 2 11 is invaded by external environment
Erosion, when generating aging or generating abrasion between inner tube 2, the magnitude of interference between oil sealing 2 11 and inner tube 2 reduces, sealing therebetween
Property also accordingly declines；It by adjusting the distance between block piece 8 and cascaded surface 16, compresses it, oil sealing 2 11 is by end face
Pressure, and through-hole 26 can prevent simultaneously oil sealing 2 11 from expanding deformation outward, so that the inner ring of oil sealing 2 11 generates inwardly
Elastically-deformable trend, so that it is even closer between the inner ring of oil sealing 2 11 and inner tube 2, increase between inner tube 2 and oil sealing 2 11
Leakproofness, leakproofness loss caused by aging and abrasion is compensated, to increase the anti-of electric pushrod to a certain extent
Aging effect and service life.
In another embodiment, second seal includes oil sealing 2 11, and first seal includes oil sealing 1 and dust-proof
Circle 10, oil sealing 1, dustband 10 and oil sealing 2 11 are set in inner tube 2, and are interference fitted with inner tube 2, and dustband 10 is arranged
Between oil sealing 1 and oil sealing 2 11.
It is internal using oil sealing 1, dustband 10, the mutually matched mode of oil sealing 2 11 by using above-mentioned technical proposal
It is sealed between pipe 2 and end cap seat 3, the form of two oil sealings and the mutual clamping of dustband 10, by the outer of dustband 10
Oil sealing 2 11 is further arranged in side, and oil sealing 2 11 can protect dustband 10, enables oil sealing 2 11 to inner tube 2
Surface carries out precleaning, prevents the dust impurity on 2 surface of inner tube from causing to damage to dustband 10, and even if working as the oil sealing two in outside
11 directly contact external environment, and when generating Aging Damage, innermost oil sealing 1 still is able to between inner tube 2 and end cap seat 3
Grease water be sealed, the protecting effect of oil sealing can be played always.
In another embodiment, drainage channel 15 includes the drainage channel 1 being formed on blocking portion 12 and is formed
Drainage channel 2 18 on interconnecting piece 13, drainage channel 1, drainage channel 2 18 are interconnected, and drainage channel 1 includes
Slot on blocking portion 12 close to 2 11 side of oil sealing is set, and the notch side of slot and the end face of oil sealing 2 11 are bonded to each other to be formed
Drainage channel 1, drainage channel 2 18 are the through-hole 4 that 13 side of interconnecting piece is arranged in, one end and the interconnecting piece 13 of through-hole 4
Lateral wall connection, internal stretch from the other end to interconnecting piece 13 and be connected to blocking portion 12.
By using above-mentioned technical proposal, structure composition of the drainage channel 15 by two-part, the part of drainage channel 1,
Drainage channel 1 is trough body structure, and cover closes on the end face of oil sealing 2 11, so that the bottom surface of drainage channel 1 and oil sealing two
11 upper surface is integrated, and the moisture in accommodating chamber 14 directly can swimmingly enter in drainage channel 1, draining
The pore size in channel 2 18 is greater than the aperture of drainage channel 1, and the position of the lower part of drainage channel 2 18 is lower than draining
The extreme lower position in channel 1, ponding can lean on the influence of gravity to enter directly into drainage channel 2 18, and logical from draining
The other end in road 2 18 is discharged.Further optimization, drainage channel 15 at least provided with three groups, holding by 15 array distribution of drainage channel
On cage 3, and each drainage channel 15 is along the three of the circumferential lengths that the length of the sum of 3 circumferential width of end cap seat is end cap seat 3
/ mono- so that when the installation direction of electric pushrod no matter towards where when, can guarantee the drainage area for having certain always.
In another embodiment, drainage channel 2 18 is formed with draining inclined-plane 19 close to the side of outer tube 1, and draining is oblique
Face 19 tilts during extending from drainage channel 1 to the lateral wall of drainage channel 2 18 to 1 side of outer tube.
By using above-mentioned technical proposal, the setting draining inclined-plane 19 on drainage channel 2 18, since draining inclined-plane 19 has
There is certain tilt angle, when the inner tube 2 that electric pushrod stretches out outer tube 1 is installed upward, drains inclined-plane 19 diagonally downward, moisture
When being discharged in accommodating chamber 14 along drainage channel 2 18, draining inclined-plane 19, there is downward certain tilt angle, ponding energy
It is enough to flow out to the outside of end cap seat 3 along draining inclined-plane 19, to improve drainage effect.
In another embodiment, the thickness of oil sealing 2 11 is greater than the depth of through-hole 26, oil sealing 1, dustband 10,
The sum of thickness of oil sealing 2 11 is greater than the sum of through-hole 4, the depth of through-hole 26.
By using above-mentioned technical proposal, since the thickness of oil sealing 2 11 is greater than the depth of through-hole 26, when oil sealing 2 11 is pacified
When mounted in 26 inside of through-hole, one end of oil sealing 2 11 is protruded in the outside of through-hole 26, and blocking portion 12 is mounted on end cap seat 3
When, blocking portion 12 generates extruding to the end face of oil sealing 2 11, so that blocking portion 12 and cascaded surface 16 generate extruding to oil sealing 2 11,
So that 2 11 inner ring of oil sealing generates certain deformation to 2 direction of inner tube, so that having between inner tube 2 and oil sealing 2 11 good close
Feng Xing.The sum of oil sealing 1, dustband 10, thickness of oil sealing 2 11 are greater than the sum of through-hole 4, the depth of through-hole 26, so as to it
When being combined assembly, certain pressure can be generated between locating piece 7, block piece 8, to improve the company between sealing element
Connect compactness.
In another embodiment, sealing lip 1 and sealing lip 2 21, sealing lip are provided on the inner ring of oil sealing 1
One 20 is equal with the interference degree of inner tube 2 with the interference degree of inner tube 2, sealing lip 2 21, is provided on the inner ring of dustband 10 close
The interference degree of the dustproof lip 1 of the sealing lip 3 22 of oil sealing 1 and separate oil sealing 1, dustproof lip 1 and inner tube 2 is less than close
The interference degree of lip 2 21 and inner tube 2 is sealed, sealing lip 3 22 is less than the interference of dustproof lip 1 and inner tube 2 with the interference degree of inner tube 2
It spends, the sealing lip 4 24 close to dustband 10 and the dustproof lip 2 25 far from dustband 10 is provided on the inner ring of oil sealing 2 11,
The interference degree of sealing lip 4 24, dustproof lip 2 25 and inner tube 2 is respectively less than the interference degree of sealing lip 2 21 Yu inner tube 2.
By using above-mentioned technical proposal, it is sealed using three sealing elements between inner tube 2 and through-hole 4, due to each
Interference degree between a sealing lip, dustproof lip and inner tube 2 is different, and the interference degree inside outer tube 1 is higher, just with inner tube 2
Between it is even closer；Interference degree between the oil sealing 2 11 and inner tube 2 of outer end is relatively low, it is thus only necessary to 2 table of inner tube
Most of impurity, dust-proof, moisture on face are cleaned, and one 23 pairs of inner tubes 2 of dustproof lip on dustband 10 are then passed through
On dust, moisture further cleaned, carry out dust seal；The inner ring of oil sealing 1 uses sealing lip 1, sealing lip two
21 are sealed simultaneously, are capable of forming dual sealing structure, stop to internal grease, and prevent extraneous impurity into
Enter between outer tube 1, inner tube 2, and oil sealing 1 is in penetralia, the protection that outer end has dustband 10, oil sealing 2 11 dual, energy
Enough prevent outside environmental elements from generating damage to oil sealing 1；Using multiple dust-proof sealing structure, each dust-proof sealing structure is mutual
Cooperation, to being sealed protection between inner tube 2 and end cap seat 3.
When block piece 8 is squeezed to cascaded surface 16, successively extrusion deformation of the inner ring of oil sealing 2 11 to dustband 10, so that
Dustproof lip 1 can be further inserted into the tapered surface in dustproof lip 1, form the part pyramid like configuration being mutually socketed, and be prevented
Dirt lip 1 and tapered surface generate mutual extrusion, generate the power squeezed to inner ring to dustproof lip 1, increase dustproof lip one
Sealing effect between 23 and inner tube 2.
In another embodiment, groove 27, oil sealing 1 are provided on the end face of oil sealing 1 on dustband 10
The upper connection ring 26 being arranged on the end face of dustband 10 for being inserted into inside groove 27, the outside of dustproof lip 1 are to anti-
The inclined tapered surface of one 23 inner ring of dirt lip, sealing lip 4 24 are equipped with the connection inclined-plane 28 for being set in dustproof lip 1,
The shape and tapered surface for connecting inclined-plane 28 cooperate.
By using above-mentioned technical proposal, between dustband 10 and oil sealing 1 between the end face of fitting close to each other, setting
Connection ring 26, groove 27 and the tapered surface that can be mutually socketed, the connection inclined-plane 28 that can be mutually inserted, setting connection structure can
Guarantee oil sealing 2 11, dustband 10, the bonding strength between oil sealing 1, prevents axial offset, so that oil sealing 2 11,
Axial compressive force on dustband 10, oil sealing 1, which can be successively transmitted on block piece 8 from locating piece 7, to be absorbed, and oil sealing is kept
One 9, it can guarantee same axis between dustband 10, oil sealing 2 11 always.
In another embodiment, locating piece 7 is the annular retaining ring being formed on 4 inner wall of through-hole, annular retaining ring it is interior
Diameter is greater than the outer diameter of inner tube 2.
By using above-mentioned technical proposal, locating piece 7 is arranged on the inner wall of through-hole 4, can to entire sealing structure into
Row stops, and annular structure, which has, stablizes smooth supporting surface, enables the end for being supported on locating piece 7 that oil sealing 1 is stable
On face, so that oil sealing 1, dustband 10 have stable support construction in the process by axial extruding force, avoid mixed and disorderly
Torsional deformation influence the sealing effect between inner tube 2 and oil sealing 1.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of waterproof seal electric pushrod, it is characterised in that: described outer including the outer tube (1) being mutually arranged and inner tube (2)
One end of pipe (1) is provided with end cap, and the end cap includes the end cap seat (3) being fixedly connected with outer tube (1), the end cap seat (3)
On be provided with the through-hole (4) passed through for inner tube (2), the through-hole (4) includes from one end close to outer tube (1) to far from outer tube
(1) one end extends and bore increased through-hole two (6) and through-hole one (5) one by one, the through-hole two (6) and through-hole one (5) phase
It is connected to and forms cascaded surface (16) in junction, the through-hole one (5) is internally provided with for inner tube (2) and through-hole one
(5) first seal sealed is provided on the through-hole one (5) mobile to outer tube (1) side for limiting first seal
Locating piece (7), the through-hole two (6) be internally provided with for inner tube (2) and through-hole two (6) sealing second sealing
Part, the end cap further include for limiting second seal to the block piece (8) far from outer tube (1) direction one end, said inner tube
(2) accommodating chamber (14) are formed between the end face and block piece (8) of outer wall, second seal, the end cap seat (3) further includes using
In the drainage channel (15) that ponding is discharged from accommodating chamber (14).
2. a kind of waterproof seal electric pushrod according to claim 1, it is characterised in that: the drainage channel (15)
One end is connected to accommodating chamber (14), and the other end is connected to the lateral wall of end cap seat (3), the drainage channel (15) from accommodating chamber
(14) it is tilted during the one end being connected to extends to the one end being connected to end cap seat (3) lateral wall to outer tube (1) side.
3. a kind of waterproof seal electric pushrod according to claim 1, it is characterised in that: the block piece (8) includes
For limiting second seal to the blocking portion (12) far from outer tube (1) direction one end and for adjusting blocking portion (12), ladder
The interconnecting piece (13) of distance between face (16), the interconnecting piece (13) are threaded on end cap seat (3), the end cap seat (3)
Outside be provided with external screw thread, be provided on the interconnecting piece (13) with the mutually matched internal screw thread of the external screw thread, it is described in
Screw thread and external screw thread are mutually assembled to form screw connection structure, the axis of the internal screw thread and externally threaded axis and inner tube (2)
In parallel.
4. a kind of waterproof seal electric pushrod according to claim 3, it is characterised in that: the second seal includes
Oil sealing two (11), the first seal include oil sealing one (9) and dustband (10), the oil sealing one (9), dustband (10) and
Oil sealing two (11) is set on inner tube (2), and is interference fitted with inner tube (2), and the dustband (10) is arranged in oil sealing one (9)
Between oil sealing two (11).
5. a kind of waterproof seal electric pushrod according to claim 4, it is characterised in that: drainage channel (15) packet
The drainage channel two (18) for including the drainage channel one (17) being formed on blocking portion (12) and being formed on interconnecting piece (13), it is described
Drainage channel one (17), drainage channel two (18) are interconnected, and the drainage channel one (17) includes being arranged in blocking portion (12)
The upper slot close to oil sealing two (11) side, the notch side of the slot and the end face of oil sealing two (11), which are bonded to each other to be formed to drain, to be led to
Road one (17), the drainage channel two (18) are through-hole (4) of the setting in interconnecting piece (13) side, one end of the through-hole (4)
Be connected to the lateral wall of interconnecting piece (13), internal stretch from the other end to interconnecting piece (13) and be connected to accommodating chamber (14).
6. a kind of waterproof seal electric pushrod according to claim 5, it is characterised in that: the drainage channel two (18)
It is formed with draining inclined-plane (19) close to the side of outer tube (1), the draining inclined-plane (19) is logical from drainage channel one (17) to draining
The lateral wall in road two (18) tilts during extending to outer tube (1) side.
7. a kind of waterproof seal electric pushrod according to claim 4, it is characterised in that: the thickness of the oil sealing two (11)
Degree is greater than the depth of through-hole two (6), and the sum of the oil sealing one (9), dustband (10), the thickness of oil sealing two (11) are greater than through-hole
(4), the sum of the depth of through-hole two (6).
8. a kind of waterproof seal electric pushrod according to claim 7, it is characterised in that: the oil sealing one (9) it is interior
Sealing lip one (20) and sealing lip two (21), interference degree, the sealing lip of the sealing lip one (20) and inner tube (2) are provided on circle
Two (21) are equal with the interference degree of inner tube (2), and the sealing lip close to oil sealing one (9) is provided on the inner ring of the dustband (10)
The dustproof lip one (23) of three (22) and separate oil sealing one (9), the dustproof lip one (23) and the interference degree of inner tube (2) are less than sealing
The interference degree of lip two (21) and inner tube (2), the interference degree of the sealing lip three (22) and inner tube (2) be less than dustproof lip one (23) with
The interference degree of inner tube (2) is provided with the sealing lip four (24) and far close to dustband (10) on the inner ring of the oil sealing two (11)
Dustproof lip two (25) from dustband (10), the sealing lip four (24), dustproof lip two (25) and the interference degree of inner tube (2) are small
In the interference degree of sealing lip two (21) and inner tube (2).
9. a kind of waterproof seal electric pushrod according to claim 8, it is characterised in that: leaned on the dustband (10)
It is provided with groove (27) on the end face of nearly oil sealing one (9), is arranged on the end face of dustband (10) on the oil sealing one (9) and uses
In the internal connection ring (26) of insertion groove (27), the outside of the dustproof lip one (23) is to tilt to dustproof lip one (23) inner ring
Tapered surface, the sealing lip four (24) is equipped with connection inclined-plane (28) for being set in dustproof lip one (23), the company
The shape and the tapered surface for connecing inclined-plane (28) cooperate.
10. a kind of waterproof seal electric pushrod according to claim 1, it is characterised in that: the locating piece (7) be at
Annular retaining ring of the shape on through-hole (4) inner wall, the internal diameter of the annular retaining ring are greater than the outer diameter of inner tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277807.2A CN109854748A (en) | 2019-04-08 | 2019-04-08 | A kind of waterproof seal electric pushrod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910277807.2A CN109854748A (en) | 2019-04-08 | 2019-04-08 | A kind of waterproof seal electric pushrod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854748A true CN109854748A (en) | 2019-06-07 |
Family
ID=66903512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910277807.2A Pending CN109854748A (en) | 2019-04-08 | 2019-04-08 | A kind of waterproof seal electric pushrod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854748A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112253751A (en) * | 2019-07-06 | 2021-01-22 | 浙江力耐得传动科技有限公司 | Dust removal structure of electric push rod |
| CN113324034A (en) * | 2021-08-02 | 2021-08-31 | 山东音速石油产业技术研究院有限公司 | Slurry pump packing sealing structure for petroleum drilling |
| WO2022037270A1 (en) * | 2020-08-19 | 2022-02-24 | 宁波帕瓦莱斯智能科技有限公司 | Waterproof structure for electric push rod |
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