CN203444389U - Position feedback and travel limit integrated mechanism of electric actuator - Google Patents
Position feedback and travel limit integrated mechanism of electric actuator Download PDFInfo
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- CN203444389U CN203444389U CN201320516950.0U CN201320516950U CN203444389U CN 203444389 U CN203444389 U CN 203444389U CN 201320516950 U CN201320516950 U CN 201320516950U CN 203444389 U CN203444389 U CN 203444389U
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Abstract
The utility model discloses a position feedback and travel limit integrated mechanism of an electric actuator. The mechanism comprises a feedback box; a gear rack is arranged in the feedback box; the lower end of the gear rack is provided with a connection pin which can be connected with the output shaft of the electric actuator; the gear rack is engaged with a stroke change gear; the stroke change gear is engaged with a feedback potentiometer gear through a feedback active gear arranged on the same transmission shaft; the feedback potentiometer gear is connected with the rotating shaft of the feedback potentiometer through the rotating shaft of the feedback potentiometer gear; and the transmission shaft is also provided with an upper limit cam, a lower limit cam and an upper limit switch and a lower limit switch respectively corresponding to the upper and lower limit cams. The mechanism effectively solves the problems of the electric actuator cam positioning mechanism in the prior art that the structure is complex, production costs are high, and the positioning precision of non-contacting detection elements is low. According to the position feedback and travel limit integrated mechanism, the structure is simple, production costs are low, positioning precision is high, and high practical value is provided.
Description
Technical field
The utility model relates to electric actuator technical field, relates in particular to a kind of electric actuator position feedback and stroke limit combined mechanism.
Background technology
Electric actuator is that indispensable topworks in automatic process control system system, consumption are large, and purposes is wide.The principle of work of electric actuator is: controls motor and drives the positive and negative rotation of nut coordinating with output shaft screw mandrel, and corresponding the moving up or down of output shaft screw mandrel of driving electric actuator, thus complete the unlatching of valve or close.Electric actuator position feedback structure is the important component part of electric actuator, for straight distance power-driven actuating, the function of position feedback mechanism is to convert the rectilinear path of electric actuator to corresponding electric signal to export with valve position feedback as a comparison to servoamplifier.Open day is on August 1st, 2012, publication number is the position feedback cam orientation mechanism that the Chinese patent document of CN202362696 U discloses a kind of electric actuator, each cam of cam set is superimposed between base and upper cover with one heart, seam is connected between each cam card and between the card of upper and lower cam and base or upper cover, each cam is all as the criterion the ring gear that radius is equal is set with basic circle, upper cover is distributed with the axis hole that quantity equates with cam set cam quantity, upper cover bottom surface is provided with the gear hugging centered by each axis hole respectively, each gear hugging is provided with the interior gear teeth, the upper whorl axial of each shaft gear embeds and engages with corresponding axis hole respectively, lower wheel shaft supports respectively and base, the lower card of each shaft gear is respectively equipped with the supporting spring that shaft gear is meshed with the interior gear teeth of gear hugging of upper cover bottom surface, the lower wheel shaft of described each shaft gear is respectively equipped with the adjustment gear being meshed with the ring gear of cam set one cam.But this cam orientation mechanism structure is complicated, and production cost is very high.Open day is on October 3rd, 2007, and the Chinese patent document that publication number is CN200956109Y discloses a kind of non-contact digital position feedback device for electric actuator, is applicable to straight stroke electric actuating mechanism.It is consisted of axle sleeve, bearing, silk braid, leading screw, gear, magnet steel, step Hall switch and location Hall switch.Silk braid upper, lower end is arranged on respectively in axle sleeve and bearing, leading screw runs in silk braid, gear is fixed on the cylindrical of silk braid and is meshed with the output shaft of motor, step Hall switch and location Hall switch are corresponding with the induction zone of magnet steel respectively, by single-chip microcomputer, the output signal of Hall switch is detected, the output valve of real-time follow-up electric actuator, and by photoelectronic coupler and controllable silicon to motor just, reversion and run location are controlled, to improve the serviceable life of electric actuator by non-contacting position detection mode and to reduce cost of products, there is overload protection and power on again after real-time follow-up function.This utility model adopts magnet steel and Hall switch to form non-contact detection element, although not wearing and tearing while working, the positioning precision of non-contact detection element is not high.
Utility model content
The purpose of this utility model is complicated for solving the electric actuator cam orientation mechanism structure of prior art, the not high problem of positioning precision of the very high and non-contact detection element of production cost and a kind of simple in structure, production cost is low and positioning precision is high electric actuator position feedback and stroke limit combined mechanism are provided.
The utility model is to solve the problems of the technologies described above adopted technical scheme to be: a kind of electric actuator position feedback and stroke limit combined mechanism, comprise feedback component fixed mount and be arranged on the feedback box on feedback component fixed mount, in described feedback box, be vertically provided with tooth bar, the lower end of tooth bar is provided with the attachment pegs that can connect with electric actuator output shaft, tooth bar and the engagement of stroke translating gear, stroke translating gear meshes by feedback driving gear and the feedback potentiometer gear being arranged on same transmission shaft, feedback potentiometer gear connects the rotation axis of feedback potentiometer by its rotating shaft, on transmission shaft, be also provided with upper limit cam and lower limit cam, one side correspondence of upper limit cam and lower limit cam is provided with upper limit position switch and lower position switch.The utility model drives stroke translating gear to rotate by moving up and down of tooth bar, the rotating shaft of stroke translating gear is a transmission shaft, transmission shaft meshes by feedback driving gear and feedback potentiometer gear on the one hand, and feedback potentiometer gear is connected with the rotating shaft of feedback potentiometer, like this, when tooth bar moves up and down with the action of electric actuator, by stroke translating gear, feedback driving gear and feedback potentiometer gear driven feedback potentiometer rotation axis rotate, changed the corner of feedback potentiometer, the electric signal that reaches change feedback potentiometer is the object of the position feed back signal of actuator, thereby the position of output axle of indication electric actuator, play the position feedback effect of electric actuator.And on the other hand; on transmission shaft, be also provided with upper limit cam and lower limit cam; one side correspondence of upper limit cam and lower limit cam is provided with upper limit position switch and lower position switch; like this; when tooth bar rises or decline over certain amplitude (being generally the full position of stroke zero-bit and stroke), limit cam touches with corresponding limit switch, cuts off in time servo motor power supply; with protection electric actuator, prevent overload, stall and damage motor.Structure of the present utility model adopts secondary gear transmission, dexterously position feedback system and journey stop gear are organically combined at one, be designed to a position feedback and travel control system assembly, the electric actuator cam orientation mechanism structure that solves prior art is complicated, the not high problem of positioning precision of the very high and non-contact detection element of production cost.
As preferably, described feedback potentiometer is conductive plastic potentiometer, feedback potentiometer is arranged on outside feedback box, and feedback potentiometer is adjusted plate by potentiometer and is fixed on the outer wall that feeds back box, and the rotating shaft of feedback potentiometer gear is connected with the rotation axis of feedback potentiometer through the box wall of feedback box; Feedback potentiometer be provided with angle indicator and with the angle direction board of angle indicator adaptation, on feedback potentiometer, be also provided with connection terminal.Feedback potentiometer is arranged on outside feedback box, and operator can see the pointer position of feedback potentiometer intuitively, favourablely in real work, the duty of electric actuator is made accurately to judgement.
As preferably, feedback box is stretched out in one end of transmission shaft, and the upper limit position switch of upper limit cam, lower limit cam and setting corresponding to it, lower position switch are all arranged on outside feedback box.This structure is install and safeguard for the ease of bound bit switch, and feedback box is that aluminium alloy extrusions is made, and simple and light, intensity meets the installation requirement of transmission shaft.
As preferably, described tooth bar integral body is cylindric, and the two ends up and down of feedback box are provided with tooth bar guiding and adjust plate; As preferably, tooth bar guiding is adjusted plate and is provided with rack bore, and described tooth bar lead and adjusted plate and be arranged on and feed back in box by tooth bar; Tooth bar and tooth bar guiding are adjusted between plate and are provided with sliding sleeve.Tooth bar guiding is adjusted plate for limiting the horizontal level of tooth bar, improves the accuracy of mesh of tooth bar and feedback driving gear by the position of fine setting tooth bar simultaneously.
As preferably, described transmission shaft is horizontally installed on feedback box, between the sidewall of transmission shaft and feedback box, is provided with bearing, near feeding back between bearing face place outside box and transmission shaft, is provided with jump ring.Jump ring can prevent that transmission shaft from making axial float.
As preferably, feedback component fixed mount is two, is symmetricly set on feedback box both sides, and described feedback component fixed mount is L-shaped, and bottom is provided with fixed orifice.
As preferably, between transmission shaft and tooth bar and potentiometer gear, be equipped with clearance adjusting mechanism.According to stage-geared theory, know, in gear train assembly, the drive gap of every grade of gear is different to the influence degree of system accuracy.Due in the feedback system of electric actuator, gearing-down is often taked in gear drive, meets large Stroke Control needs, and this gap that has just determined rear class gear is greater than the impact of the gap of prime gear on system accuracy to the impact of system accuracy.According to the gap of transmission gear, more or less can produce dysgenic theory to system accuracy, structure of the present utility model has all been taked clearance adjusting mechanism in front and back stages gear drive, can guarantee that system accuracy is not subject to the impact of gear clearance.
The beneficial effects of the utility model are: the electric actuator cam orientation mechanism structure that it has solved prior art is effectively complicated, the not high problem of positioning precision of the very high and non-contact detection element of production cost, of the present utility model simple in structure, production cost is low and positioning precision is high, has very high practical value.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1.
In figure: 1. tooth bar, 2. upper limit cam, 3. lower limit cam, 4. lower position switch, 5. upper limit position switch, 6. feedback component fixed mount, 7. stroke translating gear, 8. feedback driving gear, 9. bearing, 10. jump ring, 11. transmission shafts, 12. potentiometers are adjusted plates, 13. conductive plastic potentiometers, 14. feedback potentiometer gears, 15. tooth bar guiding are adjusted plate, 16. attachment pegs, 17. feedback boxes, 18. angle indicators, 19. angle direction boards, 20. sliding sleeves, 21. fixed orifices, 22. connection terminals.
Embodiment
Below by embodiment, and by reference to the accompanying drawings the embodiment of technical solutions of the utility model is further described.
In the embodiment 1 as shown in Fig. 1 Fig. 2, a kind of electric actuator position feedback and stroke limit combined mechanism, comprise feedback component fixed mount and be arranged on the aluminium alloy extrusions feedback box on feedback component fixed mount, feedback component fixed mount is two, be symmetricly set on feedback box both sides, described feedback component fixed mount is L-shaped, and bottom is provided with fixed orifice 21.The interior tooth bar 1 that is vertically provided with of feedback box 17, described tooth bar integral body is cylindric, the two ends up and down of feedback box are provided with tooth bar guiding and adjust plate 15, tooth bar guiding is adjusted plate and is provided with rack bore, described tooth bar is led and is adjusted plate and be arranged in feedback box by tooth bar, between tooth bar and tooth bar guiding adjustment plate, is provided with sliding sleeve 20.The lower end of tooth bar is provided with the attachment pegs 16 that can connect with electric actuator output shaft, tooth bar and 7 engagements of stroke translating gear, stroke translating gear meshes by feedback driving gear and the feedback potentiometer gear being arranged on same transmission shaft 11, feedback potentiometer gear connects the rotation axis of feedback potentiometer 13 by its rotating shaft, feedback potentiometer is conductive plastic potentiometer, feedback potentiometer is arranged on outside feedback box, feedback potentiometer is adjusted plate 12 by potentiometer and is fixed on the outer wall that feeds back box, the rotating shaft of feedback potentiometer gear is connected with the rotation axis of feedback potentiometer through the box wall of feedback box, feedback potentiometer be provided with angle indicator 18 and with the angle direction board 19 of angle indicator adaptation, on feedback potentiometer, be also provided with connection terminal 22.On transmission shaft, be also provided with upper limit cam 2 and lower limit cam 3, a side correspondence of lower limit cam and upper limit cam is provided with lower position switch 4 and upper limit position switch 5.Transmission shaft is horizontally installed on feedback box, between the sidewall of transmission shaft and feedback box, be provided with bearing 9, near being provided with jump ring 10 between the bearing face place outside feedback box and transmission shaft, feedback box is stretched out in one end of transmission shaft, and the upper limit position switch of upper limit cam, lower limit cam and setting corresponding to it, lower position switch are all arranged on outside feedback box.
Between the transmission shaft of embodiment 2 and tooth bar and potentiometer gear, be equipped with clearance adjusting mechanism, all the other are identical with embodiment 1.
During the utility model work, tooth bar moves up and down with the action of electric actuator, by stroke translating gear, feedback driving gear and feedback potentiometer gear driven feedback potentiometer rotation axis, rotate, corresponding the changing of connecting point position of feedback potentiometer, thereby the position of output axle of indication electric actuator, plays the position feedback effect of electric actuator.On the other hand, when electric actuator is up, tooth bar moves up, drives transmission shaft to clockwise rotate, thereby drives upper limit cam clockwise rotate and forwarding pre-set up stroke stop to, depress upper limit position switch, cut off actuator servo motor power supply.Otherwise when electric actuator is descending, tooth bar moves down and drives transmission shaft to rotate counterclockwise, thereby drives lower limit cam to rotate counterclockwise, and forwarding pre-set down stroke stop to, depresses lower position switch, cuts off actuator servo motor power supply.So just can protect electric actuator, prevent overload, stall and damage motor.Structure of the present utility model adopts secondary gear transmission, dexterously position feedback system and journey stop gear are organically combined at one, be designed to a position feedback and travel control system assembly, the electric actuator cam orientation mechanism structure that solves prior art is complicated, the not high problem of positioning precision of the very high and non-contact detection element of production cost.
In addition to the implementation; in claims of the present utility model and the disclosed scope of instructions; technical characterictic of the present utility model or technical data can reselect and combine; thereby form new embodiment, the embodiment that these the utility model do not have to describe in detail also should be considered as specific embodiment of the utility model and within protection domain of the present utility model.
Claims (9)
1. an electric actuator position feedback and stroke limit combined mechanism, comprise feedback component fixed mount and be arranged on the feedback box on feedback component fixed mount, it is characterized in that: in described feedback box (17), be vertically provided with tooth bar (1), the lower end of tooth bar is provided with the attachment pegs (16) that can connect with electric actuator output shaft, tooth bar and stroke translating gear (7) engagement, stroke translating gear is by being arranged on feedback driving gear (8) feedback potentiometer gear (14) engagement on same transmission shaft (11), feedback potentiometer gear connects the rotation axis of feedback potentiometer (13) by its rotating shaft, on transmission shaft, be also provided with upper limit cam (2) and lower limit cam (3), one side correspondence of upper limit cam and lower limit cam is provided with upper limit position switch (5) and lower position switch (4).
2. electric actuator position feedback according to claim 1 and stroke limit combined mechanism, it is characterized in that: described feedback potentiometer is conductive plastic potentiometer, feedback potentiometer is arranged on outside feedback box, feedback potentiometer is adjusted plate (12) by potentiometer and is fixed on the outer wall that feeds back box, and the rotating shaft of feedback potentiometer gear is connected with the rotation axis of feedback potentiometer through the box wall of feedback box.
3. electric actuator position feedback according to claim 2 and stroke limit combined mechanism, it is characterized in that: described feedback potentiometer be provided with angle indicator (18) and with the angle direction board (19) of angle indicator adaptation, on feedback potentiometer, be also provided with connection terminal (22).
4. electric actuator position feedback according to claim 1 and stroke limit combined mechanism, it is characterized in that: feedback box is stretched out in one end of transmission shaft, the upper limit position switch of upper limit cam, lower limit cam and setting corresponding to it, lower position switch are all arranged on outside feedback box.
5. electric actuator position feedback according to claim 1 and stroke limit combined mechanism, it is characterized in that: described tooth bar integral body is cylindric, the two ends up and down of feedback box are provided with tooth bar guiding and adjust plate (15), tooth bar guiding is adjusted plate and is provided with rack bore, and described tooth bar lead and adjusted plate and be arranged on and feed back in box by tooth bar.
6. electric actuator position feedback according to claim 5 and stroke limit combined mechanism, is characterized in that: tooth bar and tooth bar guiding are adjusted between plate and be provided with sliding sleeve (20).
7. according to electric actuator position feedback and stroke limit combined mechanism described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: transmission shaft is horizontally installed on feedback box, between the sidewall of transmission shaft and feedback box, be provided with bearing (9), near being provided with jump ring (10) between the bearing face place outside feedback box and transmission shaft.
8. according to electric actuator position feedback and stroke limit combined mechanism described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: feedback component fixed mount is two, be symmetricly set on feedback box both sides, described feedback component fixed mount is L-shaped, and bottom is provided with fixed orifice (21).
9. according to electric actuator position feedback and stroke limit combined mechanism described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: between transmission shaft and tooth bar and potentiometer gear, be equipped with clearance adjusting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320516950.0U CN203444389U (en) | 2013-08-22 | 2013-08-22 | Position feedback and travel limit integrated mechanism of electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320516950.0U CN203444389U (en) | 2013-08-22 | 2013-08-22 | Position feedback and travel limit integrated mechanism of electric actuator |
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| Publication Number | Publication Date |
|---|---|
| CN203444389U true CN203444389U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320516950.0U Expired - Lifetime CN203444389U (en) | 2013-08-22 | 2013-08-22 | Position feedback and travel limit integrated mechanism of electric actuator |
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| Country | Link |
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| CN (1) | CN203444389U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333198A (en) * | 2015-10-26 | 2016-02-17 | 无锡市圣科不锈钢气动自控阀门厂 | Electric actuator structure |
| CN109386644A (en) * | 2018-11-14 | 2019-02-26 | 上海孚因流体动力设备股份有限公司 | A kind of seperated mechanism that actuator aperture is accurately detected and indicated |
-
2013
- 2013-08-22 CN CN201320516950.0U patent/CN203444389U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333198A (en) * | 2015-10-26 | 2016-02-17 | 无锡市圣科不锈钢气动自控阀门厂 | Electric actuator structure |
| CN109386644A (en) * | 2018-11-14 | 2019-02-26 | 上海孚因流体动力设备股份有限公司 | A kind of seperated mechanism that actuator aperture is accurately detected and indicated |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |