CN101109428A - Worm-planetary gearing combination driven electric activator - Google Patents
Worm-planetary gearing combination driven electric activator Download PDFInfo
- Publication number
- CN101109428A CN101109428A CNA2006100544523A CN200610054452A CN101109428A CN 101109428 A CN101109428 A CN 101109428A CN A2006100544523 A CNA2006100544523 A CN A2006100544523A CN 200610054452 A CN200610054452 A CN 200610054452A CN 101109428 A CN101109428 A CN 101109428A
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- China
- Prior art keywords
- worm
- gear
- planetary gear
- electric actuator
- retarding stage
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Retarders (AREA)
Abstract
An electric actuator for a worm-planetary gear combined driving is provided, which uses a worm drive as pre reduction, 2K-H small-teeth-difference planetary gear drive as a main reduction stage. In the axial direction, a sensing interface is arranged on a worm shaft supported by a disc spring. A motor drives the worm to rotate, a worm gear engaged with the worm is fixedly connected with an eccentric shaft of the main reduction stage, the eccentric shaft drives the twin planetary gear of the planetary gear system; the twin planetary gear is respectively engaged with a fixed gear and an outputting gear; by change in combination of teeth mating, tooth difference and modulus, the output shaft can be guaranteed to drive the valve in the most acceptable speed so as to meet the accurate control over the valve in the instrument industry. The number of the reduction stage or added device is not increased due to the change in torque, the function of the interface is stressed. The structure is simple and compact.
Description
The present invention is a kind of executive system of instrument industry, is applicable to the accurate control to valve.
Current electric actuator has several types: homemade DKJ series adopts the spur gear transmission to do preposition deceleration, the main deceleration is the transmission of K-H-V small teeth number difference planet gear, and volume is big, and the velocity ratio range of choice is less relatively, can not directly gather parameters such as load moment, its functional promotion limited space.The electric actuator similar with German PS series still adopts the spur gear transmission to do preposition deceleration, and with the transmission of 3K type planetary pinion as main retarding stage, its internal gear outer is worm gear (actual is helical gear), spacing by a worm screw, worm shaft is to being supported by the dish spring, parameters such as axial displacement sensing load moment by worm screw, but the velocity ratio range of choice does not substantially improve, the handwheel that in addition is fixed on worm screw is subjected to the restriction of worm gear supporting way, after load moment surpasses 1000Nm, its manual function is lost substantially, so output torque is limited.The HQ preposition deceleration of series and the main retarding stage of Korea S all adopt worm drive, because its total reduction speed ratio is still not enough, after load moment surpasses 1000Nm, need to connect additional speed decreasing and force boosting device, and the total travel time is multiplied, and forms sudden change, and structure is not compact yet.SIPOS 5 Flash of Germany's release have in recent years adopted the motor frequency conversion technology, reduction speed ratio is about 1000～32000 scopes, its transmission collocation method is that worm screw-one-level is to secondary straight-tooth-worm screw, function heightens, but the function of these increases also not all is necessity or very useful, and because the increase of step of reduction, the complete machine size becomes very big in a certain direction.
The objective of the invention is under the condition that does not increase step of reduction or additional device, satisfy all transmission deceleration requirements of final controlling element needs, give prominence to interface function, and do not increase the size and the volume of the final controlling element of equal output torque.
Invention is done preposition deceleration with worm drive, the 2K--H type small teeth number difference planet gear transmission retarding stage of deciding.Worm shaft is to adopting the dish spring to support, and along with the variation of moment load, the axial force that is delivered to worm screw also will change, and the distortion of supporting the dish spring of worm screw makes worm shaft to the displacement that certain limit takes place, and displacement amount is by sensing, just but detection load moment (as Fig. 1).Worm screw can also be provided with other sensing interfaces.Motor at one end drives worm screw and rotates, be fixed on the eccentric shaft that 2K-H type small teeth number difference planet gear is with the worm gear of worm meshing, drive the compound planet gear motion of epicyclic train through the eccentric shaft of worm gear pair deceleration, this duplicate gear meshes with fixed gear and output gear respectively, these two pairs of engagements can be joined by various teeth, tooth is poor, the combination of modulus etc. changes, and ensure that fully effectively the output shaft that connects firmly with output gear drives valve (as Fig. 2) with the most approved rotating speed.Provide angular displacement signal by output shaft to control system.The other end of worm screw interrelates by engaging and disengaging gear and handwheel or standby motor.The working method of this electric actuator can be referring to Fig. 1 and Fig. 2.
Fig. 1 is the moment sensing interface signal of electric actuator.1. power transmission sleeve 2. dish springs 3 worm screws 4. displacement sensor heads 5. feather keys
Fig. 2 is the transmission working principle of electric actuator.1. angular signal interface 2. worm gears and eccentric shaft 3. compound planet gears 4. internal gears 5. casings 6. moment output terminals
According to the principle that the actuator total travel time prolongs along with the increase of output torque, use 2K-H The type small teeth number difference planet gear system retarding stage of deciding can fully cover the moment of actual needs for this grade deceleration The requirement of ratio, and the preposition retarding stage of the present invention is still selected the worm gear pair that has than big speed ratio, its effect removes Sensing torque signals above-mentioned also because having weakened the revolution motion of duplicate gear, has been avoided to eliminating This motion produces vibrations and sets up counterweight, has increased in addition auto-lock function.
The invention has the advantages that:
1, have interface and self-locking just and the bigger worm screw of reduction speed ratio system is big with the velocity ratio excursion and combination transmission that 2K-H type fewer differential teeth planetary that structure is compact is a planet is demonstrated fully the characteristics of final controlling element design desired " being convenient to accurate control " and " suitable output speed ", the space of having given the product function expansion and having promoted.
When 2, utilizing extension product of the present invention, only need join tooth, tooth is poor, modulus etc. is done suitably to change, and determines relevant parameter under the intensity principle.Because do not relate to the variation of step of reduction, reduction speed ratio is easy to be provided with more precisely, the component resource utilization is more reasonable, and process is also simplified.Volume, size are little, and the number of components reduces, and cost of production still extends development cost all obvious reduction.
3, homologous series product structure high conformity.
Claims (2)
1. electric actuator by worm screw-planetary pinion combination transmission.The worm screw of the preposition retarding stage of motor driving is rotated, with the worm-gear driven of the worm meshing eccentric shaft as the 2K-H type small teeth number difference planet gear system of main retarding stage.It is characterized in that: the various interface, worm gear and the main retarding stage direct connection that on the worm shaft of making axially support by the dish spring, are provided with and expand final controlling element.
2. drive line that is used for electric actuator by the combination of worm screw-planetary pinion.It is characterized in that: the main retarding stage of making this electric actuator with 2K-H type small teeth number difference planet gear system is got in touch preposition retarding stage and output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100544523A CN101109428A (en) | 2006-07-17 | 2006-07-17 | Worm-planetary gearing combination driven electric activator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100544523A CN101109428A (en) | 2006-07-17 | 2006-07-17 | Worm-planetary gearing combination driven electric activator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101109428A true CN101109428A (en) | 2008-01-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100544523A Pending CN101109428A (en) | 2006-07-17 | 2006-07-17 | Worm-planetary gearing combination driven electric activator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101109428A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561030B (en) * | 2009-05-12 | 2011-07-20 | 重庆大学 | Reaction moment balance transmission system for single rotating motor |
| CN102358585A (en) * | 2011-08-25 | 2012-02-22 | 沈佐华 | Built-in compact-typed winch transmission device |
| CN103089955A (en) * | 2011-10-27 | 2013-05-08 | 比亚迪股份有限公司 | Speed change device |
-
2006
- 2006-07-17 CN CNA2006100544523A patent/CN101109428A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561030B (en) * | 2009-05-12 | 2011-07-20 | 重庆大学 | Reaction moment balance transmission system for single rotating motor |
| CN102358585A (en) * | 2011-08-25 | 2012-02-22 | 沈佐华 | Built-in compact-typed winch transmission device |
| CN103089955A (en) * | 2011-10-27 | 2013-05-08 | 比亚迪股份有限公司 | Speed change device |
| CN103089955B (en) * | 2011-10-27 | 2015-11-25 | 比亚迪股份有限公司 | A kind of speed change gear |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080123 |