CN214466463U - Spring reset electric actuator - Google Patents
Spring reset electric actuator Download PDFInfo
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- CN214466463U CN214466463U CN202120402892.3U CN202120402892U CN214466463U CN 214466463 U CN214466463 U CN 214466463U CN 202120402892 U CN202120402892 U CN 202120402892U CN 214466463 U CN214466463 U CN 214466463U
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Abstract
The utility model discloses a spring reset electric actuator, which comprises a first transmission unit, a second transmission unit, an execution unit and a spring energy accumulator which are connected in sequence in a transmission way, wherein the first transmission unit is connected with a brake and a first driving unit in a transmission way, and the first transmission unit is used for transmitting the action of the first driving unit to the second transmission unit or transmitting the action of the second transmission unit to the brake; the second transmission unit is connected with a second driving unit in a transmission mode, the second transmission unit is used for transmitting the action of the first transmission unit or the second driving unit to the execution unit or transmitting the action of the execution unit to the first transmission unit, and the execution unit drives the spring energy accumulator to work when acting. The utility model can realize the manual, electric and reset switching without a clutch, the switching is convenient and fast without disturbance, and the dead zone is smaller; the reset torque is far higher than the energy storage of a volute spring in the prior art, and the device has wide market application prospect; compared with a motor brake mode, the working stability and reliability are effectively improved.
Description
Technical Field
The utility model relates to an electric actuator technical field, concretely relates to spring reset electric actuator.
Background
An electric actuator is a driving device capable of providing linear or rotary motion, and controls the opening and closing of a valve body by the up and down movement of an output shaft of the actuator.
In order to cope with the emergency, the conventional electric actuator is provided with a manual actuator and a reset actuator, and the valve body can be quickly opened or closed by manual control or automatic reset in case of emergency such as power failure or power source cut-off.
The manual actuating mechanism and the electric actuating mechanism of the existing electric actuator are switched through the clutch, the switching is not convenient and complex, the product cost is increased by the additionally arranged clutch, and the popularization and the use of the electric actuator with the manual actuating mechanism are not facilitated. In addition, the motor brake is used for braking the electric actuating mechanism in the braking mode of the large-scale department in domestic market, and the stability and the reliability of the motor brake in long-time work are poor.
Most of reset execution units of the existing electric execution mechanisms adopt volute spring energy storage to reset, the moment of reset caused by the limitation of the manufacturing process of volute spring energy storage cannot exceed 500N.m, the reset execution units cannot be suitable for high-reset-moment scenes, and the popularization rate of the reset execution units is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a spring reset electric actuator to adopt clutch switching manual execution and electronic execution among the solution prior art, it is inconvenient to switch, and the operation is complicated, has increased product cost, is unfavorable for popularizing and using, and the execution unit that resets adopts the spiral spring energy storage to reset, and moment is lower, can't be applicable to the technical problem of high reset moment scene.
In order to realize the purpose, the technical scheme of the utility model is that:
a spring reset electric actuator comprises a first transmission unit, a second transmission unit, an execution unit and a spring energy accumulator which are sequentially connected in a transmission manner, wherein the first transmission unit is connected with a brake and a first driving unit in a transmission manner and is used for transmitting the action of the first driving unit to the second transmission unit or transmitting the action of the second transmission unit to the brake; the second transmission unit is in transmission connection with a second driving unit and is used for transmitting the action of the first transmission unit or the second driving unit to the execution unit or transmitting the action of the execution unit to the first transmission unit, and the execution unit drives the spring energy accumulator to work when acting.
By adopting the scheme, when the first driving unit acts, the brake and the second driving unit are locked, the first driving unit transmits the action to the second driving unit, the second driving unit transmits the action to the execution unit for execution, and meanwhile, the spring energy accumulator is driven to work and store energy; when the second driving unit acts, the brake and the first driving unit are locked, the second transmission unit transmits the action to the execution unit for execution, and meanwhile, the spring energy accumulator is driven to work and store energy; when the brake needs to reset, the brake is unlocked, the first driving unit and the second driving unit are locked, the spring energy accumulator acts and drives the execution unit to act to reset, the action is transmitted to the first transmission unit by the second transmission unit, and the first transmission unit transmits the action to the brake to reset the whole system.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
furthermore, the first transmission unit comprises an output shaft a, the output end of the brake is sleeved at one end of the output shaft a, a sun gear a is arranged on the outer annular surface of the output end of the brake, the other end of the output shaft a is in transmission with the second transmission unit, a planet carrier a fixed with the output shaft a is sleeved outside the sun gear a, a planet gear a meshed with the sun gear a is embedded and mounted on the planet carrier a, a driving worm gear a is sleeved outside the planet carrier a, an inner annular surface of the driving worm gear a is provided with an inner tooth surface a meshed with the planet gear a, and the output end of the first driving unit is in transmission connection with the driving worm gear a to control the driving worm gear a to rotate.
By adopting the scheme, when the first driving unit acts, the brake is in a locking state, the first driving unit controls the driving worm wheel a to rotate at the moment to drive the planet wheel a to rotate, and the rotation of the planet wheel a drives the planet carrier a to rotate due to the fact that the sun wheel a is in the locking state, so that the output shaft a is driven to rotate and transmit the action; when the reset is needed, the brake is unlocked, the first driving unit is in a locking state, the action is transmitted to the output shaft a through the second transmission unit, the planet carrier a is driven to rotate, and the first driving unit and the driving worm wheel a are in the locking state, so that the rotation action of the planet carrier a can drive the sun wheel a to rotate through the planet wheel a, and the action is transmitted to the brake to absorb the action so as to realize the transmission termination.
Further, the first driving unit comprises a driving motor arranged beside the driving worm wheel a, a tooth line a is arranged at the end part of the output end of the driving motor, an external tooth surface a matched with the tooth line a is arranged on the outer ring surface of the driving worm wheel a, and the external tooth surface a is meshed with the tooth line a.
Further, the output shaft a other end is equipped with sun gear b, the second drive unit includes planet carrier b and the output shaft b of coaxial fixed setting, planet carrier b cover is established outside sun gear b, and planet carrier b embedded install with sun gear b meshed planet wheel b, planet carrier b overcoat is equipped with drive worm wheel b, drive worm wheel b inner annular surface be equipped with planet wheel b meshed internal tooth face b, the output of second drive unit with drive worm wheel b transmission connection control drive worm wheel b is rotatory, output shaft b with the execution unit transmission is connected.
By adopting the scheme, when the first driving unit acts, the sun gear b acts synchronously to drive the planet gear b to rotate, and the second driving unit and the driving worm gear b are in a locking state, so that the planet gear b can drive the planet carrier b to rotate to drive the output shaft b to rotate, and the action is transmitted to the execution unit to be executed; when the second driving unit acts, the worm wheel b is driven to rotate to drive the planet wheel b to rotate, and the sun wheel b is in a locking state, so that the planet wheel b can drive the planet carrier b to rotate to drive the output shaft b to rotate, and the action is transmitted to the execution unit to be executed; when resetting, the action of spring energy storage ware passes through the execution unit and transmits for output shaft b, drives planet carrier b rotatory, and drive worm wheel b is in the locking state this moment, and consequently planet carrier b can drive sun gear b through planet wheel b and rotate, will move the transmission and give first drive unit.
Further, the second driving unit comprises a hand wheel arranged beside the driving worm wheel b, a tooth line b is arranged at the output end of the hand wheel, an outer annular surface of the driving worm wheel b is provided with an outer tooth surface b matched with the tooth line b, and the outer tooth surface b is meshed with the tooth line b.
Furthermore, the execution unit comprises a transmission nut, a transmission screw rod, an execution rack and an execution gear, the transmission nut is sleeved on the transmission screw rod, the transmission nut is fixedly connected with the output shaft b, the transmission screw rod is arranged along the axial direction, one end of the transmission screw rod penetrates through the output shaft b and the planet carrier b, the other end of the transmission screw rod is fixedly connected with one end of the execution rack, the other end of the execution rack is connected with the spring energy accumulator, and the execution gear is arranged beside the execution rack and meshed with the execution rack.
By adopting the scheme, the output shaft b and the transmission nut are fixed to rotate synchronously, when the output shaft b rotates, the transmission nut is driven to rotate, the transmission screw rod is driven to axially travel, the execution rack is driven to axially travel, the execution gear is driven to rotate to open and close the valve, the action end of the synchronous ground spring energy accumulator travels along with the execution rack, and energy storage is realized; on the contrary, the active potential energy of the spring energy accumulator drives the output shaft b to rotate, and the action is transmitted to the brake for energy absorption.
Furthermore, an encoding unit is arranged beside the output shaft b and comprises an encoder, a signal gear rod is arranged at the input end of the encoder, a tooth surface c matched with the signal gear rod is arranged on the outer ring surface of the output shaft b, and the tooth surface c is meshed with the signal gear rod.
Through adopting above-mentioned scheme, when output shaft b was rotatory, signal gear lever synchronous revolution and will move and transmit for the encoder, the encoder passes through the rotation angle of signal gear lever can real-time supervision execution unit's the action condition to send transmission and control signal for control system, the monitoring and the control of the system of being convenient for.
Further, the spring energy storage ware includes the sleeve, be equipped with the action bars that sets up along the axial in the sleeve, action bars one end is worn out be equipped with behind the sleeve the action end, the action bars other end be fixed with the dog that the sleeve matches, the cover is equipped with energy storage spring on the action bars, energy storage spring is located the dog with the sleeve orientation between the action end side.
Furthermore, the output end of the brake is sleeved with a damper in a transmission connection mode.
By adopting the scheme, the damper can absorb the impact potential energy instantaneously released by the spring energy accumulator when rotating, and the safe operation of the whole set of transmission system and the valve is effectively protected.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an adopt sun gear an, planet wheel a, planet carrier a, drive worm wheel a, sun gear b, planet wheel b, planet carrier b, drive worm wheel b's multistage gear drive system, can realize the manual, electronic and the switching that resets that need not the clutch, the switching is convenient, undisturbed, simple safety, output efficiency is high, adopts the gear engagement mode transmission simultaneously, and the blind spot is less;
2. the utility model adopts the cooperation of the spring energy accumulator and the brake to reset, realizes the reset operation in an emergency state through gear transmission, has the reset moment far higher than the worm spring energy storage in the prior art, has the highest reset moment reaching 5000N.m, and has wide market application prospect;
3. the utility model discloses a multistage gear drive structure compares in the motor brake braking mode among the prior art and has effectively improved the stability and the reliability of long-time work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic sectional structure view of fig. 1.
Fig. 3 is a schematic structural diagram of a brake according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a first transmission unit according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a second transmission unit according to an embodiment of the present invention.
Shown in the figure:
1. a brake; 101. a sun gear a;
2. a first transmission unit; 201. an output shaft a; 202. a planet carrier a; 203. a planet wheel a; 204. a driving worm wheel a; 205. an inner tooth surface a; 206. an outer tooth surface a; 207. sun gear b
3. A second transmission unit; 301. an output shaft b; 302. a planet carrier b; 303. a planet wheel b; 304. a driving worm wheel b; 305. an inner tooth surface b; 306. an outer tooth surface b; 307. a tooth surface c;
4. an execution unit; 401. a drive nut; 402. a transmission screw rod; 403. an actuating rack; 404. an execution gear;
5. a spring accumulator; 501. a sleeve; 502. an action rod; 503. an action end; 504. a stopper; 505. an energy storage spring;
6. a drive motor; 601. a tooth trace a;
7. a hand wheel; 701. a tooth trace b;
8. an encoder; 801. a signal gear lever;
9. a damper.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The embodiment discloses a spring-return electric actuator, including first drive unit 2, second drive unit 3, execution unit 4 and the spring energy storage ware 5 of transmission connection in proper order, the transmission of first drive unit 2 is connected with stopper 1 and first drive unit, and first drive unit 2 is used for transmitting the action of first drive unit for second drive unit 3 or transmits the action of second drive unit 3 for stopper 1.
The second transmission unit 3 is connected with a second driving unit in a transmission mode, the second transmission unit 3 is used for transmitting the action of the first transmission unit 2 or the second driving unit to the execution unit 4 or transmitting the action of the execution unit 4 to the first transmission unit 2, and the execution unit 4 drives the spring energy accumulator 5 to work when acting.
The output end of the brake 1 is sleeved with a damper 9 in transmission connection. The damper 9 rotates to absorb the impact potential energy instantaneously released by the spring energy accumulator 5, so that the safe operation of the whole set of transmission system and the valve is effectively protected.
When the first driving unit acts, the brake 1 and the second driving unit are locked, the first transmission unit 2 transmits the action to the second transmission unit 3, the second transmission unit 3 transmits the action to the execution unit 4 for execution, and meanwhile, the spring energy accumulator 5 is driven to work and accumulate energy; when the second driving unit acts, the brake 1 and the first driving unit are locked, the second transmission unit 3 transmits the action to the execution unit 4 for execution, and meanwhile, the spring energy accumulator 5 is driven to work and store energy; when the brake needs to be reset, the brake 1 is unlocked, the first driving unit and the second driving unit are locked, the spring energy accumulator 5 acts and drives the execution unit 4 to act to realize reset, the action is transmitted to the first transmission unit 2 by the second transmission unit 3, and the first transmission unit 2 transmits the action to the brake 1 to realize reset of the whole system.
The first transmission unit 2 comprises an output shaft a201, an output end of the brake 1 is sleeved at one end of the output shaft a201, a sun gear a101 is arranged on an outer annular surface of the output end of the brake 1, the other end of the output shaft a201 is in transmission with the second transmission unit 3, a planet carrier a202 fixed with the output shaft a201 is sleeved outside the sun gear a101, a planet gear a203 meshed with the sun gear a101 is embedded and mounted on the planet carrier a202, a driving worm gear a204 is sleeved outside the planet carrier a202, an inner annular surface of the driving worm gear a204 is provided with an inner tooth surface a205 meshed with the planet gear a203, and the output end of the first driving unit is in transmission connection with the driving worm gear a204 to control the driving worm gear a204 to rotate.
When the first driving unit acts, the brake 1 is in a locked state, and at this time, the first driving unit controls the driving worm wheel a204 to rotate, so as to drive the planet wheel a203 to rotate, and because the sun wheel a101 is in the locked state, the rotation of the planet wheel a203 drives the planet carrier a202 to rotate, so as to drive the output shaft a201 to rotate and transmit actions; when the reset is needed, the brake 1 is unlocked, the first driving unit is in a locked state, the action is transmitted to the output shaft a201 from the second transmission unit 3, the planet carrier a202 is driven to rotate, and the first driving unit and the driving worm wheel a204 are in a locked state, so that the rotation action of the planet carrier a202 can drive the sun gear a101 to rotate through the planet gear a203, and the action is transmitted to the brake 1 to absorb the action, so that the transmission is stopped.
The first driving unit comprises a driving motor 6 arranged beside a driving worm wheel a204, the output end part of the driving motor 6 is provided with a tooth line a601, the outer annular surface of the driving worm wheel a204 is provided with an outer tooth surface a206 matched with the tooth line a601, and the outer tooth surface a206 is meshed with the tooth line a 601.
The other end of the output shaft a201 is provided with a sun gear b207, the second transmission unit 3 comprises a planet carrier b302 and an output shaft b301 which are coaxially and fixedly arranged, the planet carrier b302 is sleeved outside the sun gear b207, a planet gear b303 meshed with the sun gear b207 is embedded in the planet carrier b302, a driving worm gear b304 is sleeved outside the planet carrier b302, an inner annular surface of the driving worm gear b304 is provided with an inner tooth surface b305 meshed with the planet gear b303, the output end of the second transmission unit is in transmission connection with the driving worm gear b304 to control the rotation of the driving worm gear b304, and the output shaft b301 is in transmission connection with the execution unit 4.
When the first driving unit acts, the sun gear b207 acts synchronously to drive the planet gear b303 to rotate, and because the second driving unit and the driving worm gear b304 are in a locked state, the planet gear b303 can drive the planet carrier b302 to rotate to drive the output shaft b301 to rotate, and the action is transmitted to the execution unit 4 to be executed; when the second driving unit acts, the worm wheel b304 is driven to rotate to drive the planet wheel b303 to rotate, and because the sun wheel b207 is in a locking state, the planet wheel b303 can drive the planet carrier b302 to rotate, drive the output shaft b301 to rotate, and transmit the action to the execution unit 4 to execute; when the power transmission device is reset, the action of the spring energy accumulator 5 is transmitted to the output shaft b301 through the execution unit 4, the planet carrier b302 is driven to rotate, the driving worm wheel b304 is in a locked state at the moment, and therefore the planet carrier b302 drives the sun wheel b207 to rotate through the planet wheel b303, and the action is transmitted to the first driving unit.
The second driving unit comprises a hand wheel 7 arranged beside a driving worm wheel b304, the output end of the hand wheel 7 is provided with a tooth line b701, the outer ring surface of the driving worm wheel b304 is provided with an outer tooth surface b306 matched with the tooth line b701, and the outer tooth surface b306 is meshed with the tooth line b 701.
The execution unit 4 comprises a transmission nut 401, a transmission screw rod 402, an execution rack 403 and an execution gear 404, the transmission nut 401 is sleeved on the transmission screw rod, the transmission nut 401 is fixedly connected with an output shaft b301, the transmission screw rod 402 is arranged along the axial direction, one end of the transmission screw rod 402 penetrates through the output shaft b301 and a planet carrier b302, the other end of the transmission screw rod 402 is fixedly connected with one end of the execution rack 403, the other end of the execution rack 403 is connected with the spring energy accumulator 5, and the execution gear 404 is arranged beside the execution rack 403 and meshed with the execution rack 403.
The output shaft b301 and the transmission nut 401 are fixed to rotate synchronously, when the output shaft b301 rotates, the transmission nut 401 is driven to rotate, the transmission screw rod 402 is driven to travel axially, the execution rack 403 is driven to travel axially, the execution gear 404 is driven to rotate to open and close the valve, the action end 503 of the spring energy accumulator 5 synchronously travels along with the execution rack 403, and energy storage is achieved; on the contrary, the active potential energy of the spring energy accumulator 5 drives the output shaft b301 to rotate, and the action is transmitted to the brake 1 to absorb energy.
An encoding unit is further arranged beside the output shaft b301, the encoding unit comprises an encoder 8, a signal gear rod 801 is arranged at the input end of the encoder 8, a tooth surface c307 matched with the signal gear rod 801 is arranged on the outer ring surface of the output shaft b301, and the tooth surface c307 is meshed with the signal gear rod 801.
When the output shaft b301 rotates, the signal gear rod 801 synchronously rotates and transmits the motion to the encoder 8, the encoder 8 can monitor the motion condition of the execution unit 4 in real time through the rotation angle of the signal gear rod 801, and transmits the transmission and control signals to the control system, so that the monitoring and control of the system are facilitated.
The spring energy accumulator 5 comprises a sleeve 501, an action rod 502 arranged along the axial direction is arranged in the sleeve 501, an action end 503 is arranged at one end of the action rod 502 after penetrating out of the sleeve 501, a stop block 504 matched with the sleeve 501 is fixed at the other end of the action rod 502, an energy accumulation spring 505 is sleeved on the action rod 502, and the energy accumulation spring 505 is positioned between the stop block 504 and one side face of the sleeve 501 facing the action end 503.
The specific working process of this embodiment is as follows:
1. electric drive process
The driving motor 6 works, the hand wheel 7 and the brake 1 are in a locked state, the output end of the driving motor 6 drives the driving worm wheel a204 to rotate, the planet wheel a203 is driven to rotate, the sun wheel a101 is in a locked state, the planet wheel a203 drives the planet carrier a202 to rotate, the output shaft a201 and the sun wheel b207 are driven to rotate, the planet wheel b303 is driven to rotate, the planet wheel b303 drives the planet carrier b302 to rotate, the output shaft b301 is driven to rotate, the output shaft b301 drives the transmission nut 401 and the signal gear rod 801 to rotate, the signal gear rod 801 transmits a rotation signal to the encoder 8, the encoder 8 monitors the action condition of the execution unit 4 according to the rotation angle, transmits the transmission and control signals to the control system, and is convenient for monitoring and controlling the system; the transmission nut 401 rotates to drive the transmission screw rod 402 to move axially, the execution rack 403 and the action rod 502 are driven to move axially, energy storage and release of the spring energy accumulator 5 are achieved, meanwhile, the execution gear 404 rotates to perform opening or closing execution work of the valve, and electric driving is achieved.
2. Manual drive process
The handwheel 7 works, the driving motor 6 and the brake 1 are in a locking state, the handwheel 7 drives the driving turbine b to rotate, so that the planetary gear b303 is driven to rotate, the sun gear b207 is in a locking state at the moment, so that the planetary gear b303 can drive the planetary carrier b302 to rotate, so that the output shaft b301 is driven to rotate, the output shaft b301 rotates to drive the transmission nut 401 and the signal gear rod 801 to rotate, the signal gear rod 801 transmits a rotation signal to the encoder 8, the encoder 8 monitors the action condition of the execution unit 4 according to the rotation angle, and transmits the transmission and control signals to the control system, so that the monitoring and control of the system are facilitated; the transmission nut 401 rotates to drive the transmission screw rod 402 to move axially, the execution rack 403 and the action rod 502 are driven to move axially, energy storage and release of the spring energy accumulator 5 are achieved, meanwhile, the execution gear 404 rotates to perform opening or closing execution work of the valve, and manual driving is achieved.
3. Reset procedure
When the brake needs to be reset, the brake 1 is unlocked, the driving motor 6 and the hand wheel 7 are in a locking state, the action rod 502 of the spring energy accumulator 5 runs under the action of the energy accumulation spring 505 to drive the execution rack 403 and the transmission screw rod 402 to run, the execution rack 403 drives the execution gear 404 to rotate to perform the reset work of opening or closing the valve, the transmission screw rod 402 drives the transmission nut 401 to rotate, so that the output shaft b301 is controlled to rotate, the output shaft b301 rotates to drive the signal gear rod 801 and the planet carrier b302 to rotate, the signal gear rod 801 transmits a rotation signal to the encoder 8, the encoder 8 monitors the action condition of the execution unit 4 according to the rotation angle and transmits the transmission and control signal to the control system, and the monitoring and the control of the system are facilitated; because the driving worm wheel b304 is in a locked state, the rotation of the planet carrier b302 can drive the sun wheel b207 to rotate through the planet wheel b303, so as to drive the output shaft a201 and the planet carrier a202 to rotate, and because the driving worm wheel a204 is in a locked state, the planet carrier a202 can drive the sun wheel a101 to rotate through the planet wheel a203, the action of the sun wheel a101 is absorbed by the brake 1 after passing through the damper 9, so that potential energy absorption is realized, and the safety operation of the whole set of transmission system and valve is effectively protected.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. A spring reset electric actuator is characterized by comprising a first transmission unit, a second transmission unit, an execution unit and a spring energy accumulator which are sequentially connected in a transmission manner, wherein the first transmission unit is connected with a brake and a first driving unit in a transmission manner and is used for transmitting the action of the first driving unit to the second transmission unit or transmitting the action of the second transmission unit to the brake; the second transmission unit is in transmission connection with a second driving unit and is used for transmitting the action of the first transmission unit or the second driving unit to the execution unit or transmitting the action of the execution unit to the first transmission unit, and the execution unit drives the spring energy accumulator to work when acting.
2. The spring-return electric actuator according to claim 1, wherein the first transmission unit includes an output shaft a, an output end of the brake is sleeved on one end of the output shaft a, an outer annular surface of the output end of the brake is provided with a sun gear a, the other end of the output shaft a is in transmission with the second transmission unit, a planet carrier a fixed with the output shaft a is sleeved outside the sun gear a, a planet gear a engaged with the sun gear a is embedded in the planet carrier a, a drive worm gear a is sleeved outside the planet carrier a, an inner annular surface of the drive worm gear a is provided with an inner tooth surface a engaged with the planet gear a, and an output end of the first drive unit is in transmission connection with the drive worm gear a to control the drive worm gear a to rotate.
3. The spring-return electric actuator according to claim 2, wherein the first driving unit comprises a driving motor disposed beside the driving worm wheel a, the output end of the driving motor is provided with a tooth trace a, the outer annular surface of the driving worm wheel a is provided with an outer tooth surface a matched with the tooth trace a, and the outer tooth surface a is meshed with the tooth trace a.
4. The spring-return electric actuator according to claim 2, wherein a sun gear b is provided at the other end of the output shaft a, the second transmission unit includes a planet carrier b and an output shaft b which are coaxially and fixedly provided, the planet carrier b is sleeved outside the sun gear b, a planet gear b meshed with the sun gear b is installed in the planet carrier b in an embedded manner, a driving worm gear b is sleeved outside the planet carrier b, an inner annular surface of the driving worm gear b is provided with an inner tooth surface b meshed with the planet gear b, the output end of the second drive unit is in transmission connection with the driving worm gear b to control the driving worm gear b to rotate, and the output shaft b is in transmission connection with the execution unit.
5. The spring-return electric actuator according to claim 4, wherein the second driving unit comprises a hand wheel disposed beside the driving worm wheel b, the output end of the hand wheel is provided with a tooth trace b, the outer annular surface of the driving worm wheel b is provided with an outer tooth surface b matched with the tooth trace b, and the outer tooth surface b is meshed with the tooth trace b.
6. The spring-return electric actuator according to claim 4, wherein the actuator unit includes a transmission nut, a transmission screw rod, an actuator rack and an actuator gear, the transmission nut is sleeved on the transmission screw rod, the transmission nut is fixedly connected with the output shaft b, the transmission screw rod is axially disposed, one end of the transmission screw rod penetrates through the output shaft b and the planet carrier b, the other end of the transmission screw rod is fixedly connected with one end of the actuator rack, the other end of the actuator rack is connected with the spring accumulator, and the actuator gear is disposed beside the actuator rack and meshed with the actuator rack.
7. The spring-return electric actuator according to claim 4, wherein an encoding unit is further provided beside the output shaft b, the encoding unit comprises an encoder, a signal gear rod is provided at an input end of the encoder, a tooth surface c matched with the signal gear rod is provided on an outer circumferential surface of the output shaft b, and the tooth surface c is engaged with the signal gear rod.
8. The spring-return electric actuator according to claim 1, wherein the spring accumulator comprises a sleeve, an action rod is arranged in the sleeve along the axial direction, one end of the action rod penetrates out of the sleeve and is provided with an action end, the other end of the action rod is fixed with a stop block matched with the sleeve, an energy-storage spring is sleeved on the action rod, and the energy-storage spring is positioned between the stop block and a side surface of the sleeve facing the action end.
9. The spring return electric actuator of claim 1, wherein a damper is drivingly connected to the output of the brake.
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| CN202120402892.3U CN214466463U (en) | 2021-02-23 | 2021-02-23 | Spring reset electric actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112984193A (en) * | 2021-02-23 | 2021-06-18 | 中国石化销售有限公司华南分公司 | Spring reset electric actuator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984193A (en) * | 2021-02-23 | 2021-06-18 | 中国石化销售有限公司华南分公司 | Spring reset electric actuator |
| CN112984193B (en) * | 2021-02-23 | 2022-11-08 | 中国石化销售有限公司华南分公司 | Spring reset electric actuator |
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