CN207111932U - A kind of electric pushrod of multilayer proofing - Google Patents
A kind of electric pushrod of multilayer proofing Download PDFInfo
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- CN207111932U CN207111932U CN201720797990.5U CN201720797990U CN207111932U CN 207111932 U CN207111932 U CN 207111932U CN 201720797990 U CN201720797990 U CN 201720797990U CN 207111932 U CN207111932 U CN 207111932U
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- electric pushrod
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- pin bushing
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Abstract
The utility model discloses a kind of electric pushrod of multilayer proofing, belong to Linear transmission technical field, including outer tube, inner tube, drive lead screw and transmission nut, the outer tube and inner tube are in drive lead screw, moved to axial in the presence of transmission nut, guide pin bushing is installed on the outer tube, the first sealing scraping blade is provided between the guide pin bushing and inner tube, the guide pin bushing is provided with the second dust guard, axially inner side of second dust guard positioned at the first sealing scraping blade, fixed cover is installed in the outer tube, the fixed cover is enclosed on outside inner tube, the 3rd sealing ring of waterproof is provided between the fixed cover and said inner tube.The utility model has the advantages that possess anti-foreign matter, dust-proof, waterproof three is protected greatly, improve the working life of electric pushrod.
Description
【Technical field】
A kind of electric pushrod of multilayer proofing is the utility model is related to, belongs to Linear transmission technical field.
【Background technology】
Electric pushrod, linear actuators being typically also, its main operational principle is to drive drive lead screw to rotate by motor,
Transmission nut is set on drive lead screw, drives nut to move back and forth when drive lead screw rotates.
With the development of heliotechnics, solar light-heat power-generation technology is the emerging Solar use skill after photovoltaic generation
Art, its principle be substantial amounts of heliostat in a manner of focusing on by the energy accumulating of solar energy direct light, it is general to collect
It is to be collected among these using tower, the effect of heliostat is more crucial, electronic in order to improve the efficiency of heliostat reflected sunlight
Push rod is applied to the drive device as heliostat.
The electric pushrod in solar light-heat power-generation field is applied, because the environment used is in outdoor adverse circumstances
In, it is necessary to avoid the erosion of rainwater, frost, sand and dust, so this kind of electric pushrod needs good sealing protection, but existing
In some electric pushrods, only it is provided with and removes the scraping blade of foreign matter and most basic dust prevention in inner tube, but it is anti-
Water effect is not fine, if moisture enters in electric pushrod, the working life of meeting extreme influence electric pushrod.
【Utility model content】
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art and provides a kind of multilayer proofing
Electric pushrod, possess anti-foreign matter, dust-proof, waterproof three is protected greatly, improve the working life of electric pushrod.
Solves above-mentioned technical problem, the utility model adopts the following technical scheme that：
A kind of electric pushrod of multilayer proofing, including outer tube, inner tube, drive lead screw and transmission nut, the outer tube and interior
Pipe is moved to axial in the presence of drive lead screw, transmission nut, and guide pin bushing, the guide pin bushing and inner tube are provided with the outer tube
Between be provided with the first sealing scraping blade, the guide pin bushing is provided with the second dust guard, and the second dust guard is positioned at the first axle for sealing scraping blade
To inner side, fixed cover is installed in the outer tube, the fixed cover is enclosed on outside inner tube, is set between the fixed cover and said inner tube
There is the 3rd sealing ring of waterproof.
Using the beneficial effects of the utility model：
In the utility model, electric pushrod is provided with multilayer proofing, and first layer is the first sealing scraping blade, when electric pushrod makes
During with outdoor environment, easily adhere to some foreign matters on inner tube outer surface, the first sealing scraping blade is then used to scrape off be attached in
Foreign matter on tube outer surface；The second layer is the second dust guard, and the second dust guard is located between inner tube and guide pin bushing, due to the first sealing
Be not to be fully sealed between scraping blade and inner tube, have some fine particles or dust etc. or easily by first sealing scraping blade and
The gap of inner tube outer surface enters, and to be exactly little particle for stopping this part or dust enter electronic promotion to the second dust guard
It is internal；Third layer is the 3rd sealing ring of waterproof, and the second dust guard mainly plays dustproof effect, with the outer surface of inner tube it
Between or based on rigidity coordinates, rigidity referred herein, which coordinates, refers to the less cooperation of elastic deformation amount, including working of plastics and gold
Belong to the cooperation of part, and between the 3rd sealing ring and the outer surface of inner tube be the flexible mode coordinated, can prevent from being attached to inner tube
On water enter in electric pushrod.
The utility model sets three-layer protection, and sealing, stability are more preferable, even if wherein protecting generation problem together, its
The sealing of whole electric pushrod, will not cause sealing entirely ineffective under his a few road protection can also be alleviated to a certain extent.
Preferably, second dust guard includes the first guard ring and the second guard ring, the first guard ring and second prevent
Packing ring is provided between guard ring.
Preferably, the guide pin bushing is provided with the first mounting groove, first guard ring, the second guard ring are positioned in
Between one mounting groove and the fixed cover.
Preferably, the first flexible seal ring is provided between the madial wall of the first guard ring and the first mounting groove；And/or
The second flexible seal ring is provided between the madial wall of second guard ring and the first mounting groove.
Preferably, the guide pin bushing is provided with the second mounting groove for being used for installing the first sealing scraping blade, the first sealing scraping blade
The 3rd flexible seal ring is provided between the second mounting groove.
Preferably, the 3rd flexible seal ring is included positioned at the axial direction part of the first sealing scraping blade axial direction side and positioned at the
The radial section of one sealing scraping blade radial side.
Preferably, the 4th flexible seal ring is provided between the guide pin bushing and outer tube.
Preferably, being provided with mounting seat on the outer tube, the guide pin bushing periphery is convexly equipped with locating ring, and the locating ring is determined
Position is between mounting seat and the end face of outer tube.
Preferably, the inwall of the fixed cover and outer tube, one of them is provided with positioning convex tendon, and another is provided with determining
The detent of position convex tendon matching.
Preferably, being provided with electrical part inside the electric pushrod, the electrical part is connected with cable, the cable
Stretch out outside electric pushrod, the ventilation inside the electric pushrod and outside electric pushrod is communicated with the cable and is led to
Road.
Other features and advantage of the present utility model will be detailed in following embodiment, accompanying drawing exposure.
【Brief description of the drawings】
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the exploded perspective view of the utility model electric pushrod embodiment one；
Fig. 2 is the schematic cross-sectional view of the utility model electric pushrod embodiment one；
Fig. 3 is the schematic cross-section of cable in the utility model electric pushrod embodiment one；
Fig. 4 is exploded perspective view at self-locking device in the utility model electric pushrod embodiment one；
Fig. 5 is the schematic cross-sectional view one of self-locking device in the utility model electric pushrod embodiment one；
Fig. 6 is the schematic cross-sectional view two of the self-locking device of the utility model electric pushrod embodiment one；
Fig. 7 is the schematic cross-section of fixed plate and outer tube in the utility model electric pushrod embodiment one.
【Embodiment】
The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and
Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in embodiment,
Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model
Protection domain.
In the following description, occur the indicating position such as term " interior ", " outer ", " on ", " under ", "left", "right" or
Position relationship is to be described based on orientation shown in the drawings or position relationship, description embodiment merely for convenience with simplified, and
It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, because
This is it is not intended that to limitation of the present utility model.
Embodiment 1：
As shown in Figure 1 to Figure 3, a kind of electric pushrod of multilayer proofing of the present embodiment displaying, the present embodiment are mainly preferred
For in solar energy thermal-power-generating technology, driving heliostat to use, naturally it is also possible to be pushed away for other to the electronic of multilayer proofing
In the higher field of bar precision, the electric pushrod of the multilayer proofing in the present embodiment, its primary structure includes motor, motor transmission
Drive lead screw 1 is connected with, transmission nut 2 is connected with drive lead screw 1, motor is mounted in pedestal, and pedestal is fixedly connected with
Outer tube 11, and transmission nut 2 is then fixedly connected with inner tube 21, when motor driven drive lead screw 1 rotates, transmission nut 2 is with passing
Dynamic screw mandrel 1 relatively moves.For generally speaking, being to realize inner tube 21 to relatively move with outer tube 11, inner tube 21
Outermost end is then used to drive heliostat to rotate.
Guide pin bushing 81 is installed on outer tube 11 described in the present embodiment, the first sealing is provided between the guide pin bushing 81 and inner tube 21
Scraping blade 91, the guide pin bushing 81 are provided with the second dust guard 92, and the second dust guard 92 is located at the axially inner side of the first sealing scraping blade 91,
Fixed cover 82 is installed, the fixed cover 82 is enclosed on outside inner tube 21, the fixed cover 82 and said inner tube 21 in the outer tube 11
Between be provided with the 3rd sealing ring 93 of waterproof, the 3rd sealing ring 93 is located at the axially inner side of the second dust guard 92.
In the present embodiment, electric pushrod is provided with multilayer proofing, and first layer is the first sealing scraping blade 91, when electric pushrod makes
During with outdoor environment, some foreign matters are easily adhered on the outer surface of inner tube 21, the first sealing scraping blade 91 is then used to scrape attachment removal
Foreign matter on the outer surface of inner tube 21；The second layer is the second dust guard 92, the second dust guard 92 be located at inner tube 21 and guide pin bushing 81 it
Between, due to being not to be fully sealed between the first sealing scraping blade 91 and inner tube 21, there are some fine particles or dust etc. or hold
Easily entered by the gap of the first sealing scraping blade 91 and the outer surface of inner tube 21, and the second dust guard 92 is exactly to be used to stop this part
Little particle or dust enter electronic promotion inside；Third layer is the 3rd sealing ring 93 of waterproof, and the second dust guard 92 is main
It is to play dustproof effect, between the outer surface of inner tube 21 or based on rigidity cooperation, it is thrum that rigidity referred herein, which coordinates,
Property the less cooperation of deflection, include the cooperation of working of plastics and metalwork, and the outer surface of the 3rd sealing ring 93 and inner tube 21 it
Between be the flexible mode coordinated, the water that can prevent from being attached in inner tube 21 is entered in electric pushrod.
In the present embodiment, three-layer protection is set, sealing, stability are more preferable, even if wherein protecting generation problem together, its
The sealing of whole electric pushrod, will not cause sealing entirely ineffective under his a few road protection can also be alleviated to a certain extent.
Concrete structure：
As shown in Fig. 2 in the present embodiment, the end of the outer tube 11 is provided with mounting seat 15, and mounting seat 15 passes through screw thread
For adapter sleeve on outer tube 11, the outer tube 11 is provided with limited step 113, and fixed cover 82, guide pin bushing 81 are overall to be positioned in limit
Between position step 113 and the end face of mounting seat 15, the periphery of guide pin bushing 81 is convexly equipped with locating ring, and the locating ring is positioned at installation
Between 15 end face of seat and the end face of outer tube 11.In order to prevent fixed cover 82 from being relatively rotated with outer tube 11, fixed cover 82
Outer peripheral face is provided with detent 821, and the inwall of the outer tube 11 is provided with the positioning convex tendon matched with detent.
The second dust guard 92 is also improved in the present embodiment, specifically, second dust guard 92 includes first
The guard ring 9202 of guard ring 9201 and second, the first guard ring 9201 and the second guard ring 9202 are preferably to possess certain lubricity
Moulding, be provided with packing ring 9203 between the first guard ring 9201 and the second guard ring 9202, Double-protection circle be set, equivalent to
Individual layer dustproof construction is changed to double-deck dustproof construction, wherein during one layer of failure, another layer can also continue to realize dust-proof effect.
In order to facilitate the installation of the second dust guard 92, the first installation has been recessed on the inner side end of the guide pin bushing 81
Groove, first guard ring 9201, the second guard ring 9202 be positioned in the first mounting groove and the fixed cover 82 end face it
Between, so as to which the first guard ring 9201 and the second guard ring 9202 are axially located.It is it should be noted that anti-discounting for second
The property easy for installation of dirt part 92, guide pin bushing 81 and fixed cover 82 can be integrative-structures.
In order to allow the first guard ring 9201 and the second guard ring 9202 is close to the outer surface of inner tube 21, the first guard ring 9201
The first flexible seal ring 9204 is provided between the madial wall of the first mounting groove, the first flexible seal ring 9204 is O-ring, is utilized
The elastic reaction of first flexible seal ring 9204, the first guard ring 9201 can be allowed to be close to the outer surface of inner tube 21, it is similarly, described
The second flexible seal ring 9205 is provided between second guard ring 9202 and the madial wall of the first mounting groove, utilizes the second flexible sealing
The elastic reaction of circle 9205, allows the second guard ring 9202 to be close to the outer surface of inner tube 21.First guard ring 9201, the second guard ring
9202 is small with the outer surface gap of inner tube 21, and dust-proof effect is more preferable.
The guide pin bushing 81 is provided with the second mounting groove towards end face outside indent, and the first sealing scraping blade 91 is arranged on the second installation
In groove, while the first sealing scraping blade 91 also extends to the end face outside of mounting seat 15, due to the first sealing scraping blade 91 and inner tube 21
Outer surface between be certain interval be present, in order to reduce this portion gap, the first sealing mounting groove of scraping blade 91 and second
Between be provided with the 3rd flexible seal ring 94, using the elastic reaction of the 3rd flexible seal ring 94, the first sealing scraping blade 91 can be allowed
Try one's best the outer surface of inner tube 21.
The longitudinal section shape of the first sealing scraping blade 91 is substantially L-shaped in the present embodiment, and the 3rd flexible seal ring 94 is vertical
Also L-shaped to section, specifically, the 3rd flexible seal ring 94 includes axial direction part and radial section, and axial direction part is positioned at the first sealing
Between the end face of scraping blade 91 and mounting seat 15, radial section is located between the madial wall of the first sealing mounting groove of scraping blade 91 and first,
So that the 3rd flexible seal ring 94 seals the axial direction of scraping blade 91, radially all flexible effect to first so that the first sealing
Scraping blade 91 can realize a small amount of movement in radially, axially position, allow the first sealing scraping blade 91 to remove the foreign matter of the outer surface of inner tube 21
Effect is more preferable.
In addition, another layer of protection, i.e. protection between outer tube 11 and guide pin bushing 81 are also add in the present embodiment, it is previously mentioned
Be protection in inner tube 21, but some moisture, dust can be by between guide pin bushing 81 and outer tubes 11, or fixed cover
Gap between 82 and outer tube 11 enters in electric pushrod, in order to solve this problem, is set between the guide pin bushing 81 and outer tube 11
There is the 4th flexible seal ring 95.
The longitudinal cross-section of the 4th flexible seal ring 95 is preferably also L-shaped in the present embodiment, with the class of the 3rd flexible seal ring 94
Seemingly, also relative set axial component and radial component, axial component is located at the end face of mounting seat 15 to the 4th flexible seal ring 95
Between the end face of guide pin bushing 81, radial component is located between the madial wall of mounting seat 15 and the madial wall of guide pin bushing 81, so as in axial direction
Direction, radial direction are all protected.
In addition, a bit important, due to setting setting for multilayer proofing, especially the 3rd sealing ring 93 in the present embodiment
Put, substantially obstructed the air pressure inside electric pushrod between outside and circulated, caused almost to turn into one inside electric pushrod
Closed space, because the transmission nut 2 of electric pushrod is moved back and forth inside electric pushrod, similar to a piston in pin
Moved back and forth in cylinder, a vacuum effect can be produced if syringe overall tightness is very good, in syringe, then the reciprocal fortune of piston
The dynamic resistance that is subject to is very big, and similarly, the sealing of electric pushrod is very good in the present embodiment, and transmission nut 2 is in electric pushrod
Interior reciprocating motion can make to produce negative pressure inside electric pushrod, and the resistance being subject to so as to cause transmission nut 2 to move back and forth becomes big, this
The reciprocating energy consumption of sample drive nut increases, in order to solve this problem, the electricity in the present embodiment inside electric pushrod
Cable is connected with device, cable is extended to outside electric pushrod, and the electric pushrod is communicated with the cable
Venting channels outside internal and electric pushrod, electrical part are preferably motor.
For the concrete structure of cable as shown in figure 3, cable includes sheath 10a, sheath 10a is provided with more cored wire 10b, shield
The inner chamber that conduit 10c, shown conduit 10c are installed with set 10a forms venting channels, and conduit 10c internal diameter is 1mm~15mm, excellent
Elect 1mm as.
Venting channels are set on cable, and cable one end is connected on the motor inside electric pushrod, and the other end is then
It is connected in the power supply box of outside or on other power supply units, and this kind of power supply box or other power supply units are big equivalent to the external world
Gas communicates, and so, is equivalent to by cable, the air pressure inside of electric pushrod is connected with ambient pressure, and
And because the power supply units such as power supply box are typically all to have corresponding water proof and dust proof measure, so rainwater etc. also will not be from cable
Venting channels are entered in electric pushrod, so as to solve the negative pressure problem inside electric pushrod well.
First, solve most intuitively effect be exactly allow transmission nut 2 move back and forth be that the resistance being subject to greatly reduces,
So as to reduce the energy loss of electric pushrod.
Secondly, solve the problems, such as negative pressure, not exclusively reduce the problem of nut is moved back and forth by resistance, and can also
Play other effects beyong contemplation：
Although the 1, being provided with multilayer proofing on electric pushrod, because electric pushrod is arranged under open-air atmosphere, if
First sealing scraping blade 91, the second dust guard 92 nearby adhere to the foreign matters such as rainwater, frost, sand and dust, when push rod occurs flexible, by
Electric pushrod can be entered by suck-back by being more than the foreign matters such as the air pressure inside electric pushrod, this kind of rainwater, frost, sand and dust in ambient atmosphere
Inside, so be even provided with the first sealing scraping blade 91, the second dust guard 92, foreign matter still be present into electric pushrod
Problem, and after solving negative pressure problem, for electric pushrod when flexible, its air pressure inside and external pressure are consistent, at least can
Ensure that suck-back phenomenon no longer occurs, reduce the hidden danger that foreign matter enters inside electric pushrod.
2nd, the electric pushrod in solar energy techniques is applied, its operating ambient temperature is at -30 DEG C~70 DEG C, so in pole
Under the adverse circumstances at end, on 70 DEG C of daytime, -30 DEG C of night, day and night temperature reaches 100 DEG C, in this case, closed electronic to push away
Passing through 100 degrees Celsius of difference variation inside bar, there is larger difference with outside pressure in the pressure inside electric pushrod, this
When in the presence of atmospheric pressure, the first sealing scraping blade 91, the second dust guard 92, the suffered burden of the 3rd sealing ring 93 are very
Greatly, aging procedure aggravates, and influences the service life of these sealing structures.And after solving negative pressure problem, even if by round the clock 100
DEG C the temperature difference, the pressure of the inside of electric pushrod and outside can also be consistent, can at least greatly reduce because inside and outside pressure not
The unanimously burden to caused by sealing structure, improve the service life of electric pushrod.
In addition, as shown in Figures 4 to 7, the electric pushrod in the present embodiment is additionally provided with self-locking device, the self-locking device
Including left shaft holder 31, right axle bearing 32, brake disc 12 and self-locking torsion spring 13, brake disc 12 is fixed and is located on drive lead screw 1, and
Between left shaft holder 31 and right axle bearing 32, from shown in Fig. 4 and Fig. 5, left shaft holder 31 and right axle bearing 32 are positioned at brake
The different both sides of disk 12, brake disc 12 in axial force of the drive lead screw 1 by different directions be used for be adjacent to left shaft holder 31 or
Right axle bearing 32, the left shaft holder 31, right axle bearing 32 are axially located on outer tube 11, outside the brake disc 12
It is arranged with self-locking torsion spring 13, the self-locking torsion spring 13 and the periphery of left shaft holder 31, the periphery of right axle bearing 32, brake disc 12 week
Periphery be interference fitted.
Drive lead screw 1 can be by the axial force of different directions in stretching or retraction, the axial force energy driving brake disk 12
It is adjacent to left shaft holder 31 or right axle bearing 32, when motor is up, self-locking torsion spring 13 is to be in releasing orientation, therefore is stopped
Even if being to be close to state between hull 12 and left shaft holder 31 or right axle bearing 32, brake force will not be also produced between the two, and
When under motor halted state, drive lead screw 1 is to be in passive running status, self-locking torsion spring 13 is tightening state under this state, meeting
Left shaft holder 31 or right axle bearing 32 are clamped, regardless of whether now drive lead screw 1 is when stretching out or the when of retraction, brake disc 12 are inevitable
It is close to one of left shaft holder 31, right axle bearing 32, such left shaft holder 31 and right axle bearing 32, one of them will necessarily
Braking action is played to brake disc 12, for whole electric pushrod, i.e., either push rod is in the state of stretching, or retraction shape
State, as long as motor is out of service, the self-locking device of electric pushrod can be triggered so that electric pushrod possess it is two-way from
The ability of lock.
In addition, in the present embodiment, parts cost is less, especially self-locking torsion spring 13, only with one, and group
Dress is also more convenient, it is only necessary to left shaft holder 31, right axle bearing 32 is inserted into same self-locking torsion spring 13, overall loading is outer
In pipe 11, and outer tube 11 is allowed to complete axially position to left shaft holder 31, right axle bearing 32.
The concrete structure of self-locking device：
The attachment structure of brake disc 12 and drive lead screw 1：As shown in figure 4, cross-perforating 101 is provided with drive lead screw 1,
Shown brake disc 12 is set on drive lead screw 1, and is fixed on using a latch 14 on drive lead screw 1, same with drive lead screw 1
Step rotates.
Left shaft holder 31：Left bearing groove is arranged with towards the end face of brake disc 12, left bearing is installed in left bearing groove
33, left bearing 33 can reduce left shaft holder 31 and drive lead screw 1 between left shaft holder 31 and brake disc 12 after setting bearing
Between friction；End face radial convex of the left shaft holder 31 away from brake disc 12 is provided with spacing ring, and the self-locking torsion spring 13 is arranged
In the periphery of left shaft holder 31 and to be limited ring spacing.
Right axle bearing 32：It is to be symmetrical arranged with left shaft holder 31, structure is consistent, does not illustrate excessively.
In the present embodiment, left fixed plate 41 and right fixed plate 42, the left fixed plate 41 are fixed with the outer tube 11
It is located at the different both sides of brake disc 12 respectively with right fixed plate 42, is rubbed between left fixed plate 41 and the left shaft holder 31 provided with a left side
Pad, left friction plate is set, enables to brake force more to balance, on the other hand, because left shaft holder 31 is by larger braking
Under power effect, certain relative rotation occurs between meeting and left fixed plate 41, sets left friction plate effectively to reduce left bearing
Friction between seat 31 and left fixed plate 41.
Preferably, the left friction plate includes the first friction plate 51 and the second friction plate 52, the first friction plate 51
It is fixedly mounted in left fixed plate 41, the second friction plate 52 is fixedly mounted on left shaft holder 31, the first friction plate 51 and second
Left cushion block 55 is provided between friction plate 52, so designs, primary friction part is concentrated on left cushion block 55, other parts are almost
It is unaffected.
The fixed form of first friction plate 51 and left fixed plate 41：Multiple mounting holes 411 are provided with left fixed plate 41, the
Two folding ears 511 are correspondingly arranged on one friction plate 51, folding ear 511 is corresponding to be inserted in mounting hole 411, to prevent the first friction plate
51 relatively rotate with left fixed plate 41；
The fixed form of second friction plate 52 and left shaft holder 31：Indent is provided with a left side on the end face of the left shaft holder 31
Flat position groove 311, the location and installation of the second friction plate 52 in left flat position groove 311, realize it is circumferentially positioned, to prevent the second friction plate 52
Relatively rotated with left shaft holder 31.
Above-mentioned left fixed plate 41, the first friction plate 51, left cushion block 55, the second friction plate 52, left shaft holder 31, left bearing
33 are set on drive lead screw 1 in the present embodiment, wherein left fixed plate 41 is also sleeved on biography by a left positioning sleeve 61
On dynamic screw mandrel 1, to reduce friction.
Left fixed plate 41 is relatively-stationary with the holding of outer tube 11 circumferential direction, and specific positioning method can be found in Fig. 7, institute
The inwall of left fixed plate 41 and outer tube 11 is stated, one of them is provided with the first positioning bar 111, and another is provided with determines with described first
The first locating slot 412 that position muscle 111 matches, the periphery of left fixed plate 41 is provided with multiple first locating slots 412 in the present embodiment, and
The first positioning bar 111 of multiple position correspondences is circumferentially with the inwall of outer tube 11, left fixed plate 41 passes through this structure positioning
In outer tube 11.
For：Right fixed plate 42, right axle bearing 32, and the right friction being located between right fixed plate 42 and right axle bearing 32
Piece；Right friction plate includes the 3rd friction plate 53 and the 4th friction plate 54；The right side between 3rd friction plate 53 and the 4th friction plate 54
Cushion block 56；The right grade of positioning sleeve 62 is the symmetrical structure with the left side parts of brake disc 12, is not illustrated excessively.
The concrete principle of the present embodiment：
The rotation direction of drive lead screw 1 is identical with the rotation direction of self-locking torsion spring 13 in the present embodiment, when drive lead screw 1 is in motor driven
Under when rotating clockwise, brake disc 12 overcomes the frictional force of self-locking torsion spring 13 to be rotated, and electric pushrod is in normal retraction shape
State, the axial force that now drive lead screw 1 is subject to is towards A directions in Fig. 5, although brake disc 12 now and the phase of left shaft holder 31
Support, but self-locking torsion spring 13 now is releasing orientation, so under state, the meeting of left shaft holder 31 and the synchronous axial system of brake disc 12,
Do not produce brake force.
And when motor stops, drive lead screw 1 is to be in passive state, under this state, axial force that drive lead screw 1 is subject to
A directions in Fig. 5 are remained as, but now self-locking torsion spring 13 is to be in tightening state, can hold left shaft holder 31, left shaft holder 31 tightly
It is close to brake disc 12, therefore produces larger frictional force between the two, realizes braking effect；Simultaneously because with individual from lock knob
Spring 13, right axle bearing 32 can also be held tightly, now right friction plate, i.e. the 3rd friction plate 53 and the 4th friction plate 54 and right cushion block 56
Between frictional force can also play brake assisting effect.
Similarly, when drive lead screw 1 rotates counterclockwise under motor driven effect, electric pushrod is in stretching state, this
When the axial force that is subject to of drive lead screw 1 towards the B directions in Fig. 5, now brake disc 12 offsets with right axle bearing 32, but does not produce
Raw brake force.
When motor stops, self-locking torsion spring 13 is in tightening state, can hold right axle bearing 32 tightly, and right axle bearing 32 is adjacent to brake
Hull 12, to play braking action, and self-locking torsion spring 13 can hold left shaft holder 31 tightly on the left side simultaneously, and on left shaft holder 31
Frictional force between one friction plate 51 and the second friction plate 52 and left cushion block 55 can also play a part of auxiliary braking.
Due to the brake force size in the present embodiment, left shaft holder 31, right axle bearing 32 are heavily dependent on stopping
Axial gap between hull 12, at the same the distance between the first friction plate 51 and the second friction plate 52, the 3rd friction plate 53 with
The distance between 4th friction plate 54 also affects overall brake force to a certain extent, in order to make brake force more accurate, or
Person is more controllable, and the present embodiment is provided with corresponding adjustment structure.
First, in the present embodiment, positioning step 112 is provided with the outer tube 11, fixed seat is installed in the outer tube 11
7, the left fixed plate 41, right fixed plate 42 are positioned between positioning step 112 and fixed seat 7, the position of positioning step 112
It is changeless, and fixed seat 7, is by the way of being threadedly coupled with outer tube 11, in the outer wall of outer tube 11 in the present embodiment
Upper setting external screw thread, fixed seat 7 are arranged on external screw thread, and such axial location of itself of fixed seat 7 is also adjustable, using can
The characteristic of tune, it can just adjust the axial location of right fixed plate 42.It is described outer in order to avoid the position of fixed seat 7 occurs to loosen change
Pipe 11 is provided with the fastening screw nut 71 for locking the fixed seat 7.
Secondly, also there is corresponding adjustable design inside fixed seat 7, in the present embodiment, fixed seat 7 is internally provided with internal thread,
On its internal thread set two adjusting nuts 72, and the axial location of right fixed plate 42 can by the two adjusting nuts 72 come
Regulation.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, it is familiar with the those skilled in the art and should be understood that the utility model includes but is not limited to accompanying drawing and above specific embodiment party
Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims
Scope in.
Claims (10)
1. a kind of electric pushrod of multilayer proofing, including outer tube, inner tube, drive lead screw and transmission nut, the outer tube and inner tube
Moved to axial in the presence of drive lead screw, transmission nut, guide pin bushing be installed on the outer tube, the guide pin bushing and inner tube it
Between be provided with the first sealing scraping blade, it is characterised in that the guide pin bushing is provided with the second dust guard, and the second dust guard seals positioned at first
The axially inner side of scraping blade, fixed cover is installed in the outer tube, the fixed cover is enclosed on outside inner tube, the fixed cover with it is described interior
The 3rd sealing ring of waterproof is provided between pipe.
2. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that it is anti-that second dust guard includes first
Guard ring and the second guard ring, packing ring is provided between the first guard ring and the second guard ring.
3. the electric pushrod of multilayer proofing as claimed in claim 2, it is characterised in that the guide pin bushing is provided with the first installation
Groove, first guard ring, the second guard ring are positioned between the first mounting groove and the fixed cover.
4. the electric pushrod of multilayer proofing as claimed in claim 3, it is characterised in that the first guard ring and the first mounting groove
The first flexible seal ring is provided between madial wall；And/or it is provided between second guard ring and the madial wall of the first mounting groove
Second flexible seal ring.
5. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that the guide pin bushing, which is provided with, to be used to install the
Second mounting groove of one sealing scraping blade, the 3rd flexible seal ring is provided between the first sealing scraping blade and the second mounting groove.
6. the electric pushrod of multilayer proofing as claimed in claim 5, it is characterised in that the 3rd flexible seal ring includes position
Axial direction part in the first sealing scraping blade axial direction side and the radial section positioned at the first sealing scraping blade radial side.
7. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that the is provided between the guide pin bushing and outer tube
Four flexible seal rings.
8. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that mounting seat is installed on the outer tube,
The guide pin bushing periphery is convexly equipped with locating ring, and the locating ring is positioned between mounting seat and the end face of outer tube.
9. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that the inwall of the fixed cover and outer tube,
One of them is provided with positioning convex tendon, and another is provided with the detent matched with positioning convex tendon.
10. the electric pushrod of multilayer proofing as claimed in claim 1, it is characterised in that electricity is provided with inside the electric pushrod
Device, the electrical part are connected with cable, and the cable is stretched out outside electric pushrod, and institute is communicated with the cable
State the venting channels inside electric pushrod and outside electric pushrod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720797990.5U CN207111932U (en) | 2017-07-04 | 2017-07-04 | A kind of electric pushrod of multilayer proofing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720797990.5U CN207111932U (en) | 2017-07-04 | 2017-07-04 | A kind of electric pushrod of multilayer proofing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207111932U true CN207111932U (en) | 2018-03-16 |
Family
ID=61586548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720797990.5U Active CN207111932U (en) | 2017-07-04 | 2017-07-04 | A kind of electric pushrod of multilayer proofing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207111932U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366746A (en) * | 2017-07-04 | 2017-11-21 | 浙江捷昌线性驱动科技股份有限公司 | A kind of electric pushrod of multilayer proofing |
| CN108566755A (en) * | 2018-04-28 | 2018-09-21 | 郑州易通众联电子科技有限公司 | A kind of communication box of waterproof |
| 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 |
-
2017
- 2017-07-04 CN CN201720797990.5U patent/CN207111932U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366746A (en) * | 2017-07-04 | 2017-11-21 | 浙江捷昌线性驱动科技股份有限公司 | A kind of electric pushrod of multilayer proofing |
| CN108566755A (en) * | 2018-04-28 | 2018-09-21 | 郑州易通众联电子科技有限公司 | A kind of communication box of waterproof |
| 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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