CN201210255Y - Position limited switch component for electric activator - Google Patents
Position limited switch component for electric activator Download PDFInfo
- Publication number
- CN201210255Y CN201210255Y CNU2008200750811U CN200820075081U CN201210255Y CN 201210255 Y CN201210255 Y CN 201210255Y CN U2008200750811 U CNU2008200750811 U CN U2008200750811U CN 200820075081 U CN200820075081 U CN 200820075081U CN 201210255 Y CN201210255 Y CN 201210255Y
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- CN
- China
- Prior art keywords
- switch bracket
- switch
- output shaft
- electric actuator
- bracket
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a limit switch component, which is used for controlling the upper and the lower position limits of an electric executor, of an electric executor, which comprises an output shaft and an under disc of the electric executor, and also comprises a switch bracket, a micro-switch, and a shifting rod, wherein, both sides of the switch bracket are provided with two micro-switches; the switch bracket is fixed on the under disc; one end of the shifting rod is fixed on the output shaft of the electric executor, and the other end is arranged inside the switch bracket. The limit switch component has the advantages that the setup of the upper moving stopping point and the lower moving stopping point of the electric executor can be completed only by adjusting the position of the limit switch on the switch bracket; the rotation of the output shaft realizes the limit control through the movement of the shifting rod from up to down, so as to protect the valve system, thereby improving the precision, reducing the cost, and reducing the malfunction rate of the executor.
Description
Technical field
The utility model relates to a kind of limit switch, particularly a kind of limit switch assembly that is used for controlling the upper and lower spacing a kind of electric actuator of electric actuator.
Background technology
Electric actuator is that indispensable topworks in the process automation control system, consumption are big, and purposes is wide.Limit switch is parts relatively more crucial in the actuator, and it is up stroke stop and the down stroke stop that is used for controlling actuator, to upper and lower spacing the shielding of actuator.At present, the electric actuator limit switch on the market all designs and is placed on the feedback component.The principle of work of actuator is that its steady arm is partly accepted the input signal and the amplification of comparing from the aperture signal of test section, drives and the control motor to the direction of eliminating its difference, and therefore, it is particularly important that the quality of feedback component seems.Now, cam is given in the one-level transmission gear transmission that moves through on the feedback component of output shaft, change starting to control a little of limit switch by the angle of adjusting cam again, such design exists many defectives: the design size of 1 pair of cam and requirement on machining accuracy are very high, and material will have abundant assurance.2 usefulness cam cylindricals touching limit switch starts to control, and is very high to the material and the requirement on machining accuracy of limit switch.3 actuator assembly and adjustment personnel will possess certain technical foundation, have the related commissioning experience, carry out technical training to on-the-spot user of service.This grade gear drive that the spy adds in 4 feedback component has promptly strengthened cost and has increased the assembling difficulty again, and the height of gear-driven accuracies at different levels, to starting to control considerable influence is arranged a little.
More than any point in every all be directly connected to the quality of feedback component, strengthened the failure rate of feedback component, i.e. the failure rate of actuator.
Summary of the invention
In view of the deficiency that prior art exists, the utility model provides a kind of thoroughly to be separated limit switch with feedback component, has cancelled the limit switch assembly of a kind of electric actuator of the cam in the feedback component, transmission gear, transmission shaft and axle sleeve.
The utility model for achieving the above object, the technical scheme of being taked is: a kind of limit switch assembly of electric actuator, the output shaft, the chassis that comprise electric actuator, it is characterized in that: also comprise switch bracket, microswitch, driving lever, described switch bracket both sides are fixed two microswitches respectively, switch bracket is fixed on the chassis, and the output shaft of described driving lever one end and electric actuator is fixed, and the other end places switch bracket.
The beneficial effects of the utility model are: the setting of electric actuator up stroke stop and down stroke stop only need be adjusted the position of limit switch on switch bracket and can finish; output shaft rotation reaches spacing and starts to control by connecting upper and lower the moving of thereon driving lever; the protective valve door system; thereby improved precision; reduce cost, reduced the failure rate of actuator.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an A-A enlarged drawing of the present utility model.
Embodiment
A kind of limit switch assembly of electric actuator as shown in Figure 1, 2, the output shaft 1, the chassis 5 that comprise electric actuator, also comprise the switch bracket 2, microswitch 3, the driving lever 4 that have rectangular channel and oblong slots, the centre position is provided with an oval-shaped slot 202 on the switch bracket 2, its both sides are respectively equipped with two rectangular channels 201, the one end folding of switch bracket 2 has a right-angle side, is provided with two screw holes 204 on right-angle side.
Two microswitches 3 are placed respectively on the both sides rectangular channel 201 of switch bracket 2 one sides, two iron plates 6 that are slightly larger than microswitch 3 are placed corresponding two microswitch 3 positions, switch bracket 2 another side both sides, pass microswitch 3 with two screws then, rectangular channel 201 is fixing with iron plate 6, make two microswitches 3 fixing with switch bracket 2, two microswitches 3 can move up and down according to desired location, switch bracket 2 is fixed on the chassis 5 of electric actuator with two screws then, an end that driving lever 4 is had the spiral shell button is threaded with electric actuator output shaft 1, and driving lever 4 other ends place the oblong slots 202 of switch bracket 2.
Its principle of work is as follows:
Electric actuator is the rotation by reversible electric machine, drive the driving synchronous belt and pass to negative pulley wheel, negative pulley wheel is connected with acme thread with output shaft, the rotation of negative pulley wheel makes output shaft lean on the spline pin to limit its rotation, make it and can only move up or down, precision resistor is passed in the gear drive that moves through feedback mechanism of output shaft, with electricity sampling and the control requirement of satisfying position locator, simultaneously also drive driving lever and move up and down, touch microswitch.Play position-limiting action by adjusting the relative position of microswitch on switch bracket.
Claims (2)
1, a kind of limit switch assembly of electric actuator, the output shaft (1), chassis (5) that comprise electric actuator, it is characterized in that: also comprise switch bracket (2), microswitch (3), driving lever (4), described switch bracket (2) both sides are fixed two microswitches (3) respectively, switch bracket (2) is fixed on the chassis (5), the output shaft (1) of described driving lever (4) one ends and electric actuator is fixing, and the other end places switch bracket (2).
2, the limit switch assembly of electric actuator according to claim 1, it is characterized in that: described switch bracket (2) is provided with four rectangular channels (201), an oval-shaped slot (202), switch bracket (2) one ends folding has a right-angle side, is provided with two screw holes (204) on right-angle side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200750811U CN201210255Y (en) | 2008-06-20 | 2008-06-20 | Position limited switch component for electric activator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200750811U CN201210255Y (en) | 2008-06-20 | 2008-06-20 | Position limited switch component for electric activator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210255Y true CN201210255Y (en) | 2009-03-18 |
Family
ID=40480993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200750811U Expired - Fee Related CN201210255Y (en) | 2008-06-20 | 2008-06-20 | Position limited switch component for electric activator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210255Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254720A (en) * | 2011-04-08 | 2011-11-23 | 伯纳德(天津)仪表技术有限公司 | Electric cam |
| CN105022407A (en) * | 2015-08-07 | 2015-11-04 | 邸达 | Angular travel limit switch |
-
2008
- 2008-06-20 CN CNU2008200750811U patent/CN201210255Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254720A (en) * | 2011-04-08 | 2011-11-23 | 伯纳德(天津)仪表技术有限公司 | Electric cam |
| CN105022407A (en) * | 2015-08-07 | 2015-11-04 | 邸达 | Angular travel limit switch |
| CN105022407B (en) * | 2015-08-07 | 2018-02-13 | 邸达 | A kind of angle lead limit switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN TIAN YI AUTOMATION INSTRUMENTATION CO., LT Free format text: FORMER NAME: TIANJIN CITY AUTOMATION INSTRUMENT AND METERS FACTORY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: No. 95 Cheng Cheng Road, Tianjin, Hebei District: 300232 Patentee after: Tianjin Tian Tian Automatic Instrument Co., Ltd. Address before: No. 95 Cheng Cheng Road, Tianjin, Hebei District: 300232 Patentee before: Tianjin City Automation Instrument Plant |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20110620 |