CN108518465A - A kind of linear actuators - Google Patents
A kind of linear actuators Download PDFInfo
- Publication number
- CN108518465A CN108518465A CN201810352617.8A CN201810352617A CN108518465A CN 108518465 A CN108518465 A CN 108518465A CN 201810352617 A CN201810352617 A CN 201810352617A CN 108518465 A CN108518465 A CN 108518465A
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- Prior art keywords
- gear
- linear actuators
- torsional spring
- worm
- lead screw
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- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 80
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- 238000010168 coupling process Methods 0.000 claims description 40
- 238000005859 coupling reaction Methods 0.000 claims description 40
- 238000013016 damping Methods 0.000 claims description 32
- 238000005452 bending Methods 0.000 claims description 24
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 19
- 230000008602 contraction Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 241000237858 Gastropoda Species 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/10—Braking arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2071—Disconnecting drive source from the actuator, e.g. using clutches for release of drive connection during manual control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2087—Arrangements for driving the actuator using planetary gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/209—Arrangements for driving the actuator using worm gears
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H2035/005—Gearings or mechanisms preventing back-driving
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of linear actuators, including driving motor, geared worm, worm gear, lead screw, nut, driving motor connects geared worm, geared worm drives worm gear rotation, worm gear rotation drives lead screw rotation, lead screw rotation to drive nut axial movement, further include：Planetary gear set, if between worm gear and lead screw, including ring gear, sun gear, planetary gear, planet carrier, sun gear are rotated synchronously with the worm gear, planet carrier is rotated synchronously with lead screw；Brake, for ring gear braking, including external toothing.The advantage of the invention is that while improving thrust using planetary gear set, also discharged by planetary gear set, structure design is more compact.
Description
【Technical field】
The present invention relates to a kind of linear actuators, belong to Linear transmission technical field.
【Background technology】
Linear actuators, also referred to as electric pushrod are widely used in furniture, Medical Devices, solar power generation etc. field,
Primary structure includes driving motor, geared worm, worm gear, lead screw, nut, and operation principle is that driving motor driving geared worm turns
Dynamic, geared worm is engaged with worm gear to drive worm gear to rotate, and worm gear rotation drives lead screw rotation, lead screw rotation to drive nut shaft
To movement, nut is generally connected with inner tube, to realize the telescopic moving of inner tube.
Existing linear actuators on the market is much provided with relieving mechanism, relieving mechanism purpose between transmission parts
Be when being that driving motor runs out of steam, nut can the rotation of reverse drive lead screw, current published relieving mechanism is typically
It is realized by clutch action between two shaft coupling components, and linear actuators inner space is very limited, it is additional to increase by two
Shaft coupling component realizes that clutch can occupy larger space.
【Invention content】
A kind of linear actuators is provided technical problem to be solved by the present invention lies in overcome the deficiencies in the prior art,
While improving thrust using planetary gear set, also discharged by planetary gear set, structure design is more compact.
Above-mentioned technical problem is solved, the present invention adopts the following technical scheme that：
A kind of linear actuators, including driving motor, geared worm, worm gear, lead screw, nut, driving motor connection transmission
Worm screw, geared worm drive worm gear rotation, worm gear rotation that lead screw rotation, lead screw rotation is driven to drive nut axial movement, also wrap
It includes：
Planetary gear set, if between worm gear and lead screw, including ring gear, sun gear, planetary gear, planet carrier,
Sun gear is rotated synchronously with the worm gear, and planet carrier is rotated synchronously with lead screw；
Brake, for being rotated synchronously to ring gear braking, including external toothing, the external toothing and ring gear,
The external toothing is engaged with braking worm screw.
Advantageous effect using the present invention：
1, it is additionally arranged planetary gear set between worm gear and lead screw, by the gearing of planetary gear set, can subtract
The rotating speed of small gear improves the torque of lead screw, to allow lead screw to have the thrust of bigger；
2, one brake is set, which braked to the ring gear in planetary gear set, and work is former
Reason is：
When linear actuators does not need release function, i.e., in the unreleased state, brake brakes ring gear,
Ring gear cannot be freely rotated at this time.Under driving motor active drive, worm gear drives sun gear rotation, sun gear to drive
Planetary gear rotates in ring gear, while planet carrier also accordingly rotates, since planet carrier and lead screw rotate synchronously, thus it is final real
Existing lead screw rotation；
Conversely, in the unreleased state, when driving motor runs out of steam, when lead screw reverse drive, lead screw planet to be driven
Frame rotates, and since ring gear cannot be freely rotated, only under sun gear rotation situation, planet carrier could rotate, however too
Positive gear is synchronous with driving motor holding, therefore sun gear, in the case that motionless, lead screw cannot rotate, and in other words, work as drive
When dynamic motor runs out of steam, lead screw can not rotate backward.
However in this case, can also lead screw be allowed to rotate backward when user's needs run out of steam in driving motor,
It just needs to use release function, in the released state, brake unclamps ring gear, and ring gear can be freely rotated at this time.When
Driving motor runs out of steam down, lead screw reverse drive, drives planet carrier rotation, although sun gear can not still rotate at this time,
It is that ring gear can be freely rotated at this time, the axle center that planet carrier can be along sun gear together with ring gear at this time rotates together.It changes
For it, in the released state, even driving motor runs out of steam, and lead screw can also be realized and is freely rotated.
Therefore the present invention is that the architectural characteristic of planetary gear set is utilized in fact, completes the release work(of linear actuators
Can, belong to a kind of new structural framing, the planetary gear set being equivalent in the present invention can be as the work for improving driving torque
With, but also as one of relieving mechanism in linear actuators part, needed relative to traditional relieving mechanism additional
For two shaft coupling components, relieving mechanism does not need to two shaft coupling components in the present invention, because ring gear is as planet tooth
While a component in wheel assembly, the effect of shaft coupling component in relieving mechanism, i.e. ring gear are also acted as in the present invention
Two effects can be completed at the same time, such structure design makes the internal structure of linear actuators compacter.
Preferably, the linear actuators further includes external toothing, the external toothing and ring gear rotate synchronously, described outer
Gear ring is engaged with braking worm screw.
Preferably, the ring gear and external toothing are structure as a whole.
Preferably, being set with Brake torsion spring outside the braking worm screw, the Brake torsion spring shrinks torsional spring inner ring or expansion
Torsional spring inner ring, to be locked or unlocked to braking worm screw.
Preferably, the linear actuators further includes pedestal and puller, the Brake torsion spring includes torsional spring main body,
One pin, second pin, the torsional spring main body be sleeved on braking worm screw on, the first pin is fixed on pedestal, second pin by
Puller pulls, and under puller pulling function, radial contraction occurs for the Brake torsion spring to hold the braking worm screw tightly.
Preferably, being equipped with pull rod between the puller and Brake torsion spring, the pull rod is rotatably installed on pedestal, institute
Second pin location and installation is stated on pull rod.
Preferably, the pull rod includes pull rod main body and sleeve, the sleeve lining, which is equipped with, positions the second pin
Locating slot.
Preferably, being connected with sliding block between the pull rod and puller, the sliding block is slidably mounted on pedestal, described
Sliding block is equipped with walking trough, and the pull rod is equipped with roller bearing, and the roller bearing is slided and is rotatably assorted with walking trough.
Preferably, being equipped with friction sleeve between braking worm screw and the Brake torsion spring.
Preferably, being movably installed with coupling plug-in unit on the linear actuators, the braking worm screw is equipped with and couples
The coupling socket of plug-in unit cooperation, the coupling plug-in unit are inserted into coupling socket, to prevent the braking worm screw from rotating.
Preferably, the linear actuators further includes gear-box, the planetary gear set is mounted in gear-box, institute
Braking worm screw is stated to be rotatably installed in gear-box.
Preferably, the sun gear is located at the center of ring gear, it is engaged at least between sun gear and ring gear
One planetary gear, the planetary gear are mounted on the planet carrier, and the planet carrier is fixedly connected with the lead screw.
Preferably, the linear actuators further includes the auxiliary actuator of the driving braking worm screw rotation, it is described auxiliary
It is electric drive or driven by shaking to help driver.
Preferably, the brake includes the outer torsional spring of ring gear being sleeved on outside the ring gear.
Preferably, being equipped with the shaft coupling of monodirectional locking between the worm gear and sun gear, the shaft coupling includes passing
Dynamic torsional spring and damping ring with transmission torsional spring suit, worm gear actively, under sun gear driven state, worm gear transmits torque to being driven
Torsional spring simultaneously makes transmission torsional spring and the damping ring clearance fit, and worm gear is driven, under sun gear active state, and lead screw transmits torque
To transmission torsional spring and transmission torsional spring is made to be interference fitted with the damping ring.
Preferably, the shaft coupling includes circumferentially spaced first plectrum, the second plectrum, the first plectrum be used for
Worm gear connects, and for being connect with sun gear, transmission torsional spring is sleeved on the first plectrum and the second plectrum the second plectrum, and transmission is turned round
Spring includes bending pin, and the bending pincard is mounted between the first plectrum and the second plectrum.
Preferably, the transmission torsional spring is sleeved on outside the first plectrum and the second plectrum, the damping ring is sleeved on transmission and turns round
Outside spring, the bending pin radial inward bending of transmission torsional spring, when the first plectrum transmits torque to transmission torsional spring, the bending pin
Direction is screwed towards transmission torsional spring to be struck.
Preferably, the worm gear center is equipped with centre bore, first plectrum is along circumferential first set of centre bore
Arc-like sheet, second plectrum are axial raised second arc-like sheet of sun gear upper edge, and second arc-like sheet passes through described
Centre bore simultaneously forms notched round wall with the first arc-like sheet.
Preferably, the linear actuators further includes the support base set on planetary gear set tail end side, supported
The first sliding sleeve is set on seat, the tail end of first sliding sleeve is equipped with the first limit stop ring, and the sun gear is sleeved on first
On sliding sleeve and it is axially positioned between first limit stop ring and planet carrier or lead screw.
Preferably, being equipped with friction pad between the front end and planet carrier or lead screw of the sun gear.
Preferably, the support base includes center pillar and the collar wall positioned at center pillar outer circumferential, the first sliding sleeve set
On center pillar, the second sliding sleeve is set in the collar wall, the worm gear set is on the second sliding sleeve.
These features and advantages of the present invention will the detailed exposure in following specific implementation mode, attached drawing.
【Description of the drawings】
Following further describes the present invention with reference to the drawings：
Fig. 1 is the structural schematic diagram of one linear actuators of the embodiment of the present invention；
Fig. 2 is to remove the structural schematic diagram after box cover in Fig. 1；
Fig. 3 is the exploded perspective view one of one linear actuator of the embodiment of the present invention；
Fig. 4 is the enlarged diagram at A in Fig. 3；
Fig. 5 is the exploded perspective view two of one linear actuator of the embodiment of the present invention；
Fig. 6 is the exploded perspective view three of one linear actuator of the embodiment of the present invention；
Fig. 7 is the exploded perspective view four of one linear actuator of the embodiment of the present invention；
Fig. 8 is internal structure schematic diagram in the embodiment of the present invention one；
Fig. 9 is the schematic cross-sectional view in the embodiment of the present invention one.
【Specific implementation mode】
The technical solution of the embodiment of the present invention is explained and illustrated with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiment without making creative work, belongs to protection scope of the present invention.
In the following description, occur the indicating positions such as term "inner", "outside", "upper", "lower", "left", "right" or
Position relationship is to be based on the orientation or positional relationship shown in the drawings, description embodiment merely for convenience and simplified description, and
It is not instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
Embodiment one
As shown in Figures 1 to 9, the present embodiment is a kind of linear actuators, and the present embodiment linear actuator includes driving
Motor 1, geared worm 2, worm gear 3, lead screw 4, nut 5, driving motor 1 connect geared worm 2, and geared worm 2 drives 3 turns of worm gear
Dynamic, the rotation of worm gear 3 drives lead screw 4 to rotate, and the rotation of lead screw 4 drives nut 5 to move axially, in addition, further including outer in the present embodiment
Shell 6, outer tube 7, inner tube 8, the nut 5 are connect with inner tube 8, and shell 6 is connect with outer tube 7, and driving motor 1 is fixedly mounted on shell
In 6, the axial movement of nut 5 is eventually exhibited as the axially opposing displacement between inner tube 8 and outer tube 7.
12 component of planetary gear is additionally provided in the present embodiment between worm gear 3 and lead screw 4, for details, reference can be made to Fig. 5 to Fig. 8, rows
For 12 component of star gear for the drive connection between worm gear 3 and lead screw 4,12 component of planetary gear includes ring gear 10, sun tooth
Wheel 11, planetary gear 12, planet carrier 13, sun gear 11 are located in ring gear 10, and planetary gear 12 is engaged on 10 He of ring gear
Between sun gear 11, while 12 axis rotation of planetary gear is mounted on planet carrier 13.Sun gear 11 in the present embodiment
It is rotated synchronously with the worm gear 3, planet carrier 13 is rotated synchronously with lead screw 4, in the present embodiment between planet carrier 13 and lead screw 4 preferably
It is to be connected by spline fitted, 12 component of planetary gear is additionally arranged between worm gear 3 and lead screw 4, passes through 12 component of planetary gear
Gearing can reduce the rotating speed of worm gear 3, the torque of lead screw 4 be improved, to allow lead screw 4 to have the thrust of bigger；
In addition, being also provided with brake in the present embodiment, which is used to generate braking to ring gear 10 to limit it
It is freely rotated.When linear actuators does not need release function, i.e., in the unreleased state, brake makes ring gear 10
Dynamic, ring gear 10 cannot be freely rotated at this time.Under 1 active drive of driving motor, worm gear 3 drives sun gear 11 to rotate, too
Positive gear 11 drives the rotation in the ring gear 10 of planetary gear 12, while the also corresponding rotation of planet carrier 13, due to planet carrier 13 with
Lead screw 4 rotates synchronously, therefore finally realizes that lead screw 4 rotates；
Conversely, in the unreleased state, when driving motor 1 runs out of steam, when 4 reverse drive of lead screw, 4 row to be driven of lead screw
Carrier 13 rotates, and since ring gear 10 cannot be freely rotated, only under 11 rotation situation of sun gear, planet carrier 13 could turn
It is dynamic, however sun gear 11 is synchronous with the holding of driving motor 1, therefore sun gear 11, in the case that motionless, lead screw 4 cannot turn
Dynamic, in other words, when driving motor 1 runs out of steam, lead screw 4 can not rotate backward.
However in this case, lead screw 4 can be also allowed reversely to turn when user needs to run out of steam in driving motor 1
It is dynamic, it is necessary to use release function, in the released state, brake unclamps ring gear 10, and ring gear 10 can be free at this time
Rotation.When driving motor 1 runs out of steam down, 4 reverse drive of lead screw drives planet carrier 13 to rotate, although sun gear 11 at this time
It can not still rotate, but ring gear 10 can be freely rotated at this time, planet carrier 13 can be with ring gear 10 together along sun tooth at this time
The axle center of wheel 11 rotates together.In other words, in the released state, even driving motor 1 runs out of steam, and lead screw 4 also can be real
Now it is freely rotated.
Therefore the present embodiment is the architectural characteristic that 12 component of planetary gear is utilized in fact, completes the release of linear actuators
Function belongs to a kind of new structural framing, and 12 component of planetary gear quite in this present embodiment can be used as raising transmission to turn round
The effect of square, but also as one of relieving mechanism in linear actuators part, needed relative to traditional relieving mechanism
For wanting additional two shaft coupling components, relieving mechanism does not need to two shaft coupling components in the present embodiment, because ring gear 10 exists
While as a component in 12 component of planetary gear, the effect of shaft coupling component in relieving mechanism, i.e. internal tooth are also acted as
Circle 10 can be completed at the same time two effects in the present embodiment, and such structure design makes the internal structure of linear actuators more
Step up to gather.
The structure of brake can there are many embodiment, in the present embodiment preferably wherein a kind of embodiment carry out it is specific
It is unfolded, the brake in the present embodiment includes braking worm screw 14, while an external toothing 15, the external toothing are also set up in the present embodiment
15 with ring gear 10 be to rotate synchronously, external toothing 15 and the braking engaged transmission of worm screw 14.When braking worm screw 14 can be freely rotated, outside
Gear ring 15, ring gear 10 can also be freely rotated, and when braking worm screw 14 and cannot be freely rotated, it is equivalent to external toothing 15, ring gear
10 can not be freely rotated, and the release work(of linear actuators is realized so as to brake the rotatably mounted of worm screw 14 by control
Energy.
In the present embodiment, ring gear 10 and external toothing 15 are preferably integral structure, and ring gear 10 is in radially inner side, external toothing
The step of 15 in radial outside, and integral structure eliminates ring gear 10 and the connection of external toothing 15, certainly, those skilled in the art
Be readily apparent that between ring gear 10 and external toothing 15 can by be fixedly connected or spline fitted mode come realize rotate synchronously, this
Class embodiment is each fallen in protection scope of the present invention.
Brake is arranged to brake 14 this structure of worm screw by the present embodiment, brakes worm screw 14 first and is easy to control in itself,
The purpose that control braking worm screw 14 can be realized using Brake torsion spring 16 or coupling inserting mode, secondly using braking worm screw 14
Also another is acted on：Braking worm screw 14 is also used as an additional type of drive to drive linear actuators, because
When driving motor 1 runs out of steam, when rolling brake worm screw 3, braking worm screw 3 can drive external toothing 15 accordingly to rotate, internal tooth
Circle 10 also can be rotated accordingly, and sun gear 11 is fixed at this time, thus when ring gear 10 rotates can drive planetary gear 12,
Planet carrier 13 rotates together, and being equivalent to can drive lead screw 4 to rotate, therefore brake can driven using the structure of braking worm screw 14
In the case that dynamic motor 1 runs out of steam, linear actuators is driven to move as a kind of additional type of drive.
Driving braking worm screw 14 is rotated, further includes that the auxiliary for driving the braking worm screw 3 to rotate is driven in the present embodiment
Dynamic device, the auxiliary actuator are electric drive or driven by shaking.Braking worm screw 14 can be realized with additional stand-by motor and drive
Dynamic, when driving motor 1 breaks down or runs out of steam, stand-by motor can be used as auxiliary power source to drive；Certainly auxiliary is driven
Dynamic device can also be driven by shaking, i.e., drives braking worm screw 14 to rotate by hand mode.
It should be noted that those skilled in the art will be appreciated that, the structure of brake is not limited solely in the present embodiment
Description, it can also be other embodiment, specifically can refer to embodiment two.
Braking worm screw 14 is locked or unlocked for convenience, and a control braking worm screw 14 is preferably provided in the present embodiment and is locked
Or the switching device of unlock, as shown in figure 4, the switching device includes Brake torsion spring 16, pedestal 17, puller 18, braking is turned round
Spring 16 is set in outside braking worm screw 14, and when the torsional spring inner ring of Brake torsion spring 16 is shunk, Brake torsion spring 16 is real to braking worm screw 14
It now holds tightly to lock braking worm screw 14, otherwise when the torsional spring inner ring of Brake torsion spring 16 expands, Brake torsion spring 16 is to braking snail
Bar 14 is nearly free from active force, and braking worm screw 14 is in the unlocked state at this time, can be freely rotated.
And it is more convenient, Brake torsion spring 16 can become controllable to the brake force of braking worm screw 14, because drawing
Dynamic device 18 determines the deflection size of Brake torsion spring 16 to the pulling force size of Brake torsion spring 16, using this Modulatory character, uses
Family may be implemented the never step-less adjustment between release conditions and release conditions, and traditional switching device, be typically only capable to realize
Release conditions or non-release conditions.
As shown in figure 4,16 specific connection structure of Brake torsion spring in the present embodiment：The Brake torsion spring 16 includes torsional spring master
Body, the first pin 16a, second pin 16b, the torsional spring main body are sleeved on braking worm screw 14, and the first pin 16a is fixed on base
On seat 17, a jack is set, the first pin 16a, which is inserted into jack, realizes positioning specifically on pedestal 17.It needs
It is bright, it can be an individual part for pedestal 17, can also be to be integrally formed with shell 6, the present embodiment
In preferably pedestal 17 be an individual part.
First pin 16a of Brake torsion spring 16 is fixed on pedestal 17, and second pin 16b is then pulled by puller 18,
Under 18 pulling function of puller, radial contraction occurs for the Brake torsion spring 16 to hold the braking worm screw 14 tightly.Puller 18
It can be that drag-line is directly connected on second pin 16b, can also be and be connected indirectly on second pin 16b, in the present embodiment
Puller 18 and second pin 16b be directly provided with pull rod 19, which be movably arranged on pedestal 17, the other end
It is to be connected and fixed with second pin 16b.
In order to allow pull rod 19 to connect more convenient, stabilization with second pin 16b, pull rod 19 described in the present embodiment includes drawing
Bar main body and sleeve 20,20 inner wall of the sleeve are equipped with the locating slot 20a for positioning the second pin 16b.Locating slot 20a is excellent
It is selected as a L-shaped groove, is sleeved in sleeve 20 in Brake torsion spring 16, second pin 16b is first caught in from a slot of L-shaped groove, is rotated
It is navigated to after certain angle in another slot of L-shaped groove, to complete the fixation of second pin 16b.In addition, in order to allow first to draw
Foot 16a is convenient to be stretched out out of sleeve 20, and sleeve 20 is equipped with the evacuation notch 20b stretched out for the first pin 16a.
In order to make the rotation of pull rod 19 more smoothly, sliding block 21 is connected between the pull rod 19 and puller 18, it is described
Sliding block 21 is slidably mounted on pedestal 17, and the sliding block 21 is equipped with walking trough 21a, and the pull rod 19 is equipped with roller bearing 19a, institute
Roller bearing 19a is stated to slide and be rotatably assorted with walking trough 21a.When puller 18 pulls pull rod 19, the roller bearing 19a of pull rod 19 can
It slides in walking trough 21a, can also be rotated in walking trough 21a, designing pull rod 19 in this way will not interfere in rotation, together
When rotary motion trace it is also more controllable, facilitate control Brake torsion spring 16.
In the present embodiment, the puller 18 includes drag-line, and the drag-line is connect with sliding block 21, the sliding block 21 and drag-line
Between be equipped with resetting spring 22.Drag-line has two in the present embodiment, and the terminal of two drag-lines may be mounted at different location, side
Just user's operation.
As shown in figure 3, in order to preferably cover sliding block 21, pull rod 19, switching device described in the present embodiment further includes box
Lid 23, the box cover 23 are connect with pedestal 17, and the Brake torsion spring 16 is mounted in box cover 23.In the present embodiment box cover 23 be with
Pedestal 17 is articulated and connected, while being also provided with the buckle 23a of locking, and corresponding block button hole 17a is then provided on pedestal 17.Profit
Not only can parts be played with screening effect with box cover 23, while can also play guarantor to components such as pull rod 19, Brake torsion springs 16
Shield acts on.
In addition, in order to reduce frictional force of the Brake torsion spring 16 the case where not holding tightly between rainy braking worm screw 14, it is described
It brakes and is equipped with friction sleeve 24 between worm screw 14 and Brake torsion spring 16, friction sleeve 24 is preferably with notch, when Brake torsion spring 16
When not shrinking, the frictional force braked between worm screw 14 and friction sleeve 24 is relatively small, and when Brake torsion spring 16 is shunk, clamping rubs
Set 24 is wiped, friction sleeve 24 brakes braking worm screw 14 using the deformability of notch.
It should be noted that the mode of braking to braking worm screw 14, it is not limited to the Brake torsion spring 16 in the present embodiment, this
Field technology personnel are readily apparent that, can also be by the way of mechanical couplings grafting, such as are movably installed with coupling on pedestal 17
Plug-in unit is closed, coupling plug-in unit can be bolt, the coupling socket for braking worm screw 14 and being equipped with and coupling plug-in unit cooperation, the coupling
It closes plug-in unit and is inserted into coupling socket, to prevent the braking worm screw 14 from rotating.The mode of this coupling grafting makes braking worm screw 14
It is dynamic, also fall into protection scope of the present invention.
As shown in figure 5, the linear actuators further includes gear-box 25, shown gear-box 25 is by two and half gear housings
25a assembles to be formed, and 12 component of the planetary gear is mounted in gear-box 25, and the braking worm screw 3 is rotatably installed in gear-box
More stable in order to allow braking worm screw 14 to install in 25, two and half gear housing 25a are provided with for the braking installation of worm screw 14
Mounting hole position 2501, so that 14 both ends of braking worm screw can realize positioning.
About package assembly of 12 component of planetary gear in gear-box 25, reference can be made to shown in Fig. 6 to Fig. 7, the present embodiment
In improvement is also optimized to the package assembly of 12 component of planetary gear so that its assembling is compacter, volume smaller, specifically
It is as follows：
Linear actuators in the present embodiment further includes a support base 26, and the tail of the support base 26 and linear actuators is drawn
27 are fixedly connected, and support base 26 is located at the side that 12 component of planetary gear draws 27 towards tail, and first is set on institute's support base 26
The tail end of sliding sleeve 28, first sliding sleeve 28 is equipped with the first limit stop ring 28a, and the sun gear 11 is sleeved on the first sliding sleeve 28
Above and it is axially positioned between the first limit stop ring 28a and planet carrier 13 or lead screw 4.
Since sun gear 11 is to realize assembling, the first sliding sleeve by the first sliding sleeve 28 with the first limit stop ring 28a
28 pairs of sun gears 11 both realize radial positioning, also realize axially position, compacter in structure for bearing, especially
It is radial space smaller, can significantly reduce the internal space requirements to gear-box 25, and increase for bearing
Add axial positioning function, in addition assemble the assembling difficulty that difficulty is significantly less than bearing, and the cost of the first sliding sleeve 28 is also wanted
It is significantly less than bearing.
Meanwhile worm gear 3 in order to facilitate the installation of, the present embodiment worm gear 3 are also to be installed by the form of sliding sleeve, specifically and
Speech, the support base 26 include center pillar 29 and the collar wall 30 positioned at 29 outer circumferential of center pillar, and first sliding sleeve 28 is sleeved on
On center pillar 29, the second sliding sleeve 31 is set in the collar wall 30, the worm gear 3 is sleeved on the second sliding sleeve 31.After assembling
Assembly relation can be found in Fig. 9, and worm gear 3 is realized by the second sliding sleeve 31 and assembled, compacter, the radial direction of the second sliding sleeve 31 in structure
Space smaller.In addition, since sun gear 11, worm gear 3 are assembled in one simultaneously by the first sliding sleeve 28, the second sliding sleeve 31 respectively
On support base 26, center pillar 29 and peripheral wall are preferably arranged concentrically in the present embodiment, therefore when sun gear 11 and worm gear 3 are pacified simultaneously
When on a support base 26, the concentricity of the two can be ensured well, i.e., same between worm gear 3 and sun gear 11
Axis degree is more preferable, and the precision of transmission is more preferable.
Preferably, the tail end of the second sliding sleeve 31 described in the present embodiment is equipped with prevent worm gear 3 from being moved towards tail end the
Two limit stop ring 31a, radial positioning and axially position can also be realized simultaneously to worm gear 3 by being equivalent to the second sliding sleeve 31, and worm gear 3
Front end then carries out axial limiting by sun gear 11, and the worm gear 3 is equipped with centre bore 3a, during 11 part of the sun gear is stretched into
Heart hole 3a, the worm gear 3 is equipped at centre bore 3a prevents the auxiliary catch that sun gear 11 is moved towards tail end direction, auxiliary gear
Piece is the step structure being located in centre bore 3a, and concrete structure can specifically be unfolded below, the end face of sun gear 11 and auxiliary
Catch offsets to form axially position, and in other words, the tail end of worm gear 3 is by the second limit stop ring 31a limits of the second sliding sleeve 31, snail
The front end of wheel 3 is limited by sun gear 11, and this positioning method structure is compacter, and cost is lower, while being assembled also more square
Just.
In addition, in the present embodiment lead screw 4 be with planet carrier 13 rotate synchronously, sun gear 11 with lead screw 4, planet carrier 13
When relatively rotating, can there are problems that rubbing between the two or wear, in order to reduce sun gear 11 and lead screw 4 or planet
Friction between frame 13 is equipped with friction pad 32, friction pad 32 between the front end and planet carrier 13 or lead screw 4 of the sun gear 11
Rub proofness it is more preferable.Friction pad 32 can also play the role of to 11 axially position of sun gear in the present embodiment simultaneously.
Friction pad 32 in order to facilitate the installation of, be equipped in the planet carrier 13 axially through mounting hole, the friction pad 32,
Lead screw 4 is installed in mounting hole, and the friction pad 32 is axially positioned between sun gear 11 and lead screw 4.After the completion of positioning
Schematic diagram can be found in Fig. 9.
In addition, for the assembling side between 12 component of planetary gear, worm gear 3,26 internal structure of support base and gear-box 25
Formula, the present embodiment are preferably specific as follows：
For support base 26, the collar wall 30 of the support base 26, which radially extends, is equipped with retainer ring 26a, the gear-box
25 inner wall is equipped with the card slot 2502 for clamping the retainer ring 26a, and retainer ring 26a is non-circular structure, retainer ring 26a in the present embodiment
Cross section be preferably octagon, card slot 2502 is also set accordingly into respective shapes, and retainer ring 26a is snap-fit in card slot 2502
Afterwards, support base 26 can not be freely rotated in gear-box 25.
For the ring gear 10 in 12 component of planetary gear, the inner wall of the gear-box 25 is equipped with the first annular groove 2503,
First annular groove 2503 is located at the front side of card slot 2502, and the peripheral side of the ring gear 10 is equipped with the first bulge loop 10a, the first bulge loop
10a is installed in the first annular groove 2503, and such ring gear 10 is axially assembled by the first bulge loop 10a on gear-box 25, together
When can also be rotated on gear-box 25.
Certainly, preferably, in the present embodiment between ring gear 10 and the inner wall of gear-box 25 additional one
Third sliding sleeve 33, for reducing the friction between 25 inner wall of gear-box and ring gear 10,33 outer wall of third sliding sleeve is mounted on
In first mounting groove, inner wall be equipped with matched second annular grooves 3301 of the first bulge loop 10a, the third sliding sleeve 33 is by two
Half ring set 33a compositions.
For lead screw 4, it is arranged with bearing outside the lead screw 4, specifically, it is to be sleeved on planet carrier 13 that bearing, which has half,
On, the other half is sleeved on by a bearing holder (housing, cover) 39 on lead screw 4, and the inner wall of the gear-box 25 is equipped with the axis of installation bearing 38
Hold slot 2504.
As shown in Figure 6 and Figure 7, in order to allowing 12 assembly operating of planetary gear more stable, the present embodiment is to planetary gear 12
Component is correspondingly improved, specific as follows：
12 component of the planetary gear further includes planetary gear retainer 34, and the planetary gear retainer 34 is equipped with the
A positioning hole 34a and second location hole 34b, planetary gear retainer 34 is fixed by second location hole 34b and planet carrier 13 to be connected
It connects, the planet wheel spindle 35 for installing planetary gear 12 is provided on planet carrier 13, planetary gear 12 is sleeved on planet wheel spindle 35
On, 35 one end of the planet wheel spindle is mounted on planet carrier 13, and the other end is mounted in first positioning hole 34a.
The present embodiment is improved planetary gear retainer 34, and traditional planet wheel spindle 35 only has one end rotation in planet
On frame 13,12 frame of planetary gear is only to be kept fixed with planet carrier 13, and be provided on planet wheel spindle 35 in the present embodiment
It is used to support the first positioning hole 34a of planet wheel spindle 35, so that the both ends of planet wheel spindle 35 can be supported, allows planet
The circle beating degree smaller of wheel shaft 35, stability is more preferable, and planetary gear 12 can be highly stable in transmission process.
By there are three planetary gears 12 in this present embodiment, therefore 35 phase of the present embodiment planet wheel spindle should have three, and first is fixed
There are three position hole 34a is then corresponding, and second location hole 34b, it is preferably provided between adjacent first positioning hole 34a, therefore this reality
Apply a second location hole 34b also it is corresponding preferably there are three.
Planet wheel spindle 35 is pierced by disengaging from planetary gear retainer 34 in order to prevent, and the planet wheel spindle 35 is towards planet
34 one end of retainer for gear is equipped with stage portion, and the stage portion is by 34 axially position of planetary gear retainer.In order to reduce
The friction of the end face and planetary gear retainer 34 of planetary gear 12, the planetary gear retainer 34 is in second location hole 34b
Side be extended with raised surrounding edge 34c towards 13 direction of planet carrier, after raised surrounding edge 34c is set, the end face of planetary gear 12 only with
Raised surrounding edge 34c contacts, can effectively reduce contact area.
The planetary gear retainer 34 is equipped with the gear grooved 34d of accommodating planetary gear 12, with more preferably to planetary gear
12 realizations are held in position.There are three being set due to planetary gear 12 described in the present embodiment, the gear grooved 34d also should mutually have three
A, three gear grooved 34d are circumferentially spaced, and the first positioning hole 34a is between adjacent gear grooved 34d, such knot
Structure design more compact and reasonable.
In addition, in the present embodiment, the shaft coupling of monodirectional locking, the connection of monodirectional locking are equipped between the worm gear 3 and lead screw 4
Axis device can allow driving force normally to transmit when effect is normal direction driving rotation, conversely, when reverse drive rotates, meeting
Play the role of locking or prevention to driving force, is with playing in the present embodiment：When worm gear 3 is used as main driving
When, it can normally drive lead screw 4 to be rotated, conversely, when lead screw 4 is as main driving, then can play resistance to the rotation of lead screw 4
Buddhist nun acts on, and lead screw 4 is prevented to be rotated further, this is the reverse self-locking power for improving linear actuators in fact.
The shaft coupling of monodirectional locking is also disclosed in existing machinery field, is had to the shaft coupling of monodirectional locking in the present embodiment
Institute's Optimal improvements, the shaft coupling include transmission torsional spring 35 and the damping ring that is set with transmission torsional spring 35, worm gear 3 actively, lead screw 4
Under driven state, worm gear 3, which transmits torque, to transmission torsional spring 35 and makes transmission torsional spring 35 and the damping ring clearance fit, worm gear 3
Under driven, 4 active state of lead screw, lead screw 4, which transmits torque, to transmission torsional spring 35 and makes transmission torsional spring match with the damping ring interference
It closes.It is very low in cost using the mating reaction of transmission torsional spring 35 and damping ring, while transmission torsional spring 35, damping ring are matched
It closes, it is small for traditional shaft coupling, it is low to the internal space requirements of linear actuators.
As shown in Figure 6 to 8, in the present embodiment, the shaft coupling concrete structure of this monodirectional locking is as follows：
The shaft coupling includes circumferentially spaced first plectrum 36, the second plectrum 37, and the first plectrum 36 is used for and snail
3 connection of wheel, the second plectrum 37 are used to be sequentially connected with lead screw 4, and in the present embodiment, the second plectrum 37 is connected with sun gear 11
It connects, is sequentially connected with lead screw 4 to realize indirectly, transmission torsional spring 35 is sleeved on the first plectrum 36 and the second plectrum 37, is driven
Torsional spring 35 includes bending pin 35a, and the bending pin 35a is installed between the first plectrum 36 and the second plectrum 37.
In the present embodiment, transmission torsional spring 35 is sleeved on outside the first plectrum 36 and the second plectrum 37, and the damping ring is sleeved on
Outside transmission torsional spring 35, the bending pin 35a radial inward bendings of transmission torsional spring 35, the first plectrum 36 is transmitted to transmission torsional spring 35 and is turned round
When square, the bending pin 35a screws direction towards transmission torsional spring 35 and is struck.
When transmission torsional spring 35 is stirred by different directions, it may occur that two states, one is shrinkage directions, and one is the sides of extending out
To, when the first plectrum 36 drives transmission torsional spring 35, radial contraction can occur for transmission torsional spring 35, so that transmission torsional spring 35
Gap between peripheral side and damping ring becomes larger, and is regarded as no friction between transmission torsional spring 35 and damping ring at this time, at this time shape
State transmission torsional spring 35 holds the first plectrum 36 tightly, the second plectrum 37 rotates simultaneously, and sun gear can normally be driven by being equivalent to worm gear 3
11 rotations.
Conversely, when transmission torsional spring 35 is reversed and stirs, i.e., the first plectrum 36 is passive, and the second plectrum 37 is active, this
When the second plectrum 37 to transmission torsional spring 35 transmit torque when, the direction that unscrews of the bending pin 35a towards transmission torsional spring 35 is dialled
Dynamic, transmission torsional spring 35 can occur radial direction and extend out, and occur to be interference fitted between transmission torsional spring 35 and damping ring after radial extend out, from
And damping is generated, damping ring can prevent transmission torsional spring 35 from being rotated further at this time, and the second plectrum can be prevented by being also equivalent to damping ring
37 are rotated further.
In other words, it when worm gear 3 is as main driving, can be rotated with normal driving lead screw 4, when lead screw 4 is used as main driving
When, when being equivalent to sun gear 11 as driving, worm gear 3 can not be driven to rotate.It can be only done single-direction transmission.
In order to which the first plectrum 36 and the second plectrum 37 can preferably be matched with transmission torsional spring 35,3 center of the worm gear is set
It is the first arc-like sheet circumferentially set along centre bore to have centre bore 3a, first plectrum 36, and second plectrum 37 is the sun
Axial raised second arc-like sheet of 11 upper edge of gear, simultaneously because the cooperation of the first arc-like sheet and the second arc-like sheet is in worm gear 3
Centre bore 3a position, be equivalent to the center that shaft coupling part is located at worm gear 3, axial position is Chong Die with worm gear 3, reduces whole knot
The axial length of structure.
It should be noted that the internal diameter of the first arc-like sheet is less than the internal diameter of centre bore 3a in the present embodiment, when sun tooth
When wheel 11 partially passes through centre bore 3a, the end face of sun gear 11 can be kept out by the first arc-like sheet, and the first arc-like sheet is at this time
The effect for above assisting catch is acted as, is equivalent to, worm gear 3 is the to the auxiliary catch of sun gear 11 in the present embodiment
One arc-like sheet.
In assembling, second arc-like sheet, which passes through the centre bore and forms notched circle with the first arc-like sheet, to be enclosed
Wall, transmission torsional spring 35 are sleeved on outside the circle wall, and the bending pin 35a of transmission torsional spring 35 is installed in notch.This implementation
More stablize to transmit in example, the both ends of transmission torsional spring 35 are respectively equipped with bending pin 35a, are equivalent to transmission torsional spring 35 and have
Two bending pin 35a, and the first arc-like sheet and the second arc-like sheet just form two notches in assembling, two bendings are drawn
Foot 35a can be just installed in two notches.
In the present embodiment, damping ring is preferably the collar wall 30 on support base 26, and transmission torsional spring 35 is to be sleeved on collar wall
In 30, in this way, additional designs damping ring can be saved, collar wall 30 quite in this present embodiment has two effects, outside
All side walls can be used for positioning suit worm gear 3, and inner circumferential side wall can be used for generating damping action with transmission torsional spring 35, such
It is less to design parts, more compact structure, while also allowing for assembling.
Embodiment two
The difference between this embodiment and the first embodiment lies in it to ring gear braking is carried out using braking worm screw that embodiment is a kind of
It brakes, in the present embodiment, ring gear is braked, using the torsional spring directly outside one ring gear of external suit of ring gear, pass through drawing
The outer torsional spring of rope direct pull ring gear, radial contraction or radial direction to realize the outer torsional spring of ring gear extend out, when torsional spring outside ring gear
When radial contraction, braking can be generated to ring gear, be the alternative of the brake a kind of to embodiment.
Embodiment three
The difference between this embodiment and the first embodiment lies in the coupler structure of monodirectional locking between worm screw and lead screw is
Difference, in the present embodiment, the transmission torsional spring is sleeved in the first plectrum and the second plectrum, and the damping ring is to be sleeved on transmission to turn round
In spring, in other words, damping ring is located at most inner side, and the first plectrum, the second plectrum are located at outermost, and transmission torsional spring is located at damping ring
Between first plectrum, the second plectrum.
The bending pin of transmission torsional spring in the present embodiment is radially bending, and the first plectrum is transmitted to transmission torsional spring and turned round
When square, the bending pin unscrews direction towards transmission torsional spring and is struck, and when the second plectrum transmits torque to transmission torsional spring, institute
It states bending pin and screws direction towards transmission torsional spring and be struck, operation principle is as follows：
When the first plectrum is as driving, transmission torsional spring occurs radial direction and extends out, at this time the inside of transmission torsional spring and damping ring
Outside between gap become larger, therefore be believed that frictional force between transmission torsional spring and damping ring becomes smaller, transmission torsional spring at this time
It is free to rotate, to which transmission torsional spring can drive the first plectrum, the second plectrum to rotate together；
And when the second plectrum is as driving, radial contraction occurs for torsional spring, at this time the inside of transmission torsional spring and damping ring it
Between be interference fitted, therefore be believed that damping ring prevent transmission torsional spring rotate, the second plectrum is prevented from rotating at this time.
By this embodiment in this present embodiment, need that a damping ring, damping ring are separately provided on support base
Preferably it is located between center pillar and collar wall.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but not limited to attached drawing and interior described in specific implementation mode above
Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the range of claims.
Claims (21)
1. a kind of linear actuators, including driving motor, geared worm, worm gear, lead screw, nut, driving motor connection transmission snail
Bar, geared worm drive worm gear rotation, worm gear rotation that lead screw rotation, lead screw rotation is driven to drive nut axial movement, feature
It is, further includes：
Planetary gear set, if between worm gear and lead screw, including ring gear, sun gear, planetary gear, planet carrier, the sun
Gear is rotated synchronously with the worm gear, and planet carrier is rotated synchronously with lead screw；
Brake is freely rotated for generating braking to ring gear with limiting it.
2. linear actuators as described in claim 1, which is characterized in that the linear actuators further includes external toothing, described
External toothing and ring gear rotate synchronously, and the external toothing is engaged with braking worm screw.
3. linear actuators as claimed in claim 2, which is characterized in that the ring gear and external toothing are structure as a whole.
4. linear actuators as claimed in claim 2, which is characterized in that be set with Brake torsion spring outside the braking worm screw, institute
It states Brake torsion spring to shrink torsional spring inner ring or expand torsional spring inner ring, to lock or unlock braking worm screw.
5. linear actuators as claimed in claim 4, which is characterized in that the linear actuators further includes pedestal and pulling
Device, the Brake torsion spring include torsional spring main body, the first pin, second pin, and the torsional spring main body is sleeved on braking worm screw, the
One pin is fixed on pedestal, and second pin is pulled by puller, and under puller pulling function, diameter occurs for the Brake torsion spring
To contraction to hold the braking worm screw tightly.
6. linear actuators as claimed in claim 5, which is characterized in that be equipped with and draw between the puller and Brake torsion spring
Bar, the pull rod are rotatably installed on pedestal, and the second pin location and installation is on pull rod.
7. linear actuators as claimed in claim 6, which is characterized in that the pull rod includes pull rod main body and sleeve, described
Sleeve lining is equipped with the locating slot for positioning the second pin.
8. linear actuators as claimed in claim 6, which is characterized in that it is connected with sliding block between the pull rod and puller,
The sliding block is slidably mounted on pedestal, and the sliding block is equipped with walking trough, and the pull rod is equipped with roller bearing, the roller bearing and row
It walks slot sliding and is rotatably assorted.
9. linear actuators as claimed in claim 4, which is characterized in that be equipped with and rub between braking worm screw and the Brake torsion spring
Wipe set.
10. linear actuators as claimed in claim 2, which is characterized in that be movably installed with coupling on the linear actuators
Plug-in unit, the coupling socket for braking worm screw and being equipped with and coupling plug-in unit cooperation, the coupling plug-in unit is inserted into coupling socket, to hinder
The only braking worm screw rotation.
11. linear actuators as claimed in claim 2, which is characterized in that the linear actuators further includes gear-box, described
Planetary gear set is mounted in gear-box, and the braking worm screw is rotatably installed in gear-box.
12. linear actuators as claimed in claim 2, which is characterized in that the sun gear is located at the center of ring gear, too
At least one planetary gear is engaged between positive gear and ring gear, the planetary gear is mounted on the planet carrier, described
Planet carrier is fixedly connected with the lead screw.
13. linear actuators as claimed in claim 2, which is characterized in that the linear actuators further includes the driving system
The auxiliary actuator of dynamic worm screw rotation, the auxiliary actuator are electric drive or driven by shaking.
14. linear actuators as described in claim 1, which is characterized in that the brake includes being sleeved on the ring gear
The outer torsional spring of outer ring gear.
15. linear actuators as described in claim 1, which is characterized in that be equipped between the worm gear and sun gear unidirectional
The shaft coupling of locking, the shaft coupling include transmission torsional spring and the damping ring that is set with transmission torsional spring, worm gear actively, sun gear
Under driven state, worm gear, which transmits torque, to transmission torsional spring and makes transmission torsional spring and the damping ring clearance fit, and worm gear is driven, too
Under positive gear active state, lead screw transmits torque to transmission torsional spring and transmission torsional spring is made to be interference fitted with the damping ring.
16. linear actuators as claimed in claim 15, which is characterized in that the shaft coupling includes circumferentially spaced
One plectrum, the second plectrum, the first plectrum with worm gear for connecting, and the second plectrum with sun gear for connecting, transmission torsional spring set
On the first plectrum and the second plectrum, transmission torsional spring includes bending pin, and the bending pincard is mounted in the first plectrum and the
Between two plectrums.
17. linear actuators as claimed in claim 16, which is characterized in that the transmission torsional spring is sleeved on the first plectrum and
Outside two plectrums, the damping ring is sleeved on outside transmission torsional spring, the bending pin radial inward bending of transmission torsional spring, and the first plectrum is to biography
When dynamic torsional spring transmits torque, the bending pin screws direction towards transmission torsional spring and is struck.
18. linear actuators as claimed in claim 17, which is characterized in that the worm gear center is equipped with centre bore, and described the
One plectrum is the first arc-like sheet circumferentially set along centre bore, and second plectrum is sun gear upper edge axial raised second
Arc-like sheet, second arc-like sheet pass through the centre bore and form notched round wall with the first arc-like sheet.
19. linear actuators as described in claim 1, which is characterized in that the linear actuators further includes being set to planet tooth
The support base of wheel assembly tail end side, the first sliding sleeve is set on institute's support base, and the tail end of first sliding sleeve is equipped with the first limit
Position baffle ring, the sun gear are sleeved on the first sliding sleeve and are axially positioned on first limit stop ring and planet carrier or lead screw
Between.
20. linear actuators as claimed in claim 19, which is characterized in that the front end of the sun gear and planet carrier or silk
Friction pad is equipped between bar.
21. linear actuators as claimed in claim 19, which is characterized in that the support base include center pillar and positioned at center pillar week
Collar wall outward, first sliding sleeve are sleeved on center pillar, and the second sliding sleeve, the worm gear set are set in the collar wall
On the second sliding sleeve.
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| CN201810352617.8A CN108518465B (en) | 2018-04-19 | 2018-04-19 | Linear actuator |
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| CN201810352617.8A CN108518465B (en) | 2018-04-19 | 2018-04-19 | Linear actuator |
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| CN108518465B CN108518465B (en) | 2024-06-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110067398A (en) * | 2019-04-30 | 2019-07-30 | 湖南六建装饰设计工程有限责任公司 | A kind of fitting-up Multifunctional scraper knife and its method |
| CN110701270A (en) * | 2019-09-20 | 2020-01-17 | 宝鸡法士特齿轮有限责任公司 | Planet differential type automatic torque-changing electric control device |
| CN111810603A (en) * | 2020-06-09 | 2020-10-23 | 浙江捷昌线性驱动科技股份有限公司 | One-way driving linear actuator |
| CN114174698A (en) * | 2019-06-14 | 2022-03-11 | 德沃康有限责任公司 | Linear driver |
| CN117325282A (en) * | 2023-11-30 | 2024-01-02 | 山西一建集团有限公司 | Bearing wall pouring forming device |
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| CN111810603A (en) * | 2020-06-09 | 2020-10-23 | 浙江捷昌线性驱动科技股份有限公司 | One-way driving linear actuator |
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