CN101645682B - Motor forward and backward rotation protection loop of limited switch - Google Patents
Motor forward and backward rotation protection loop of limited switch Download PDFInfo
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- CN101645682B CN101645682B CN2009101685109A CN200910168510A CN101645682B CN 101645682 B CN101645682 B CN 101645682B CN 2009101685109 A CN2009101685109 A CN 2009101685109A CN 200910168510 A CN200910168510 A CN 200910168510A CN 101645682 B CN101645682 B CN 101645682B
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Abstract
The embodiment of the invention discloses a motor forward and backward rotation protection loop of a limited switch, comprising a motor forward rotation starting button, a motor backward rotation starting button, a stop dog, a forward stroke limit switch, a backward stroke limit switch, a motor forward rotation coil, a motor backward rotation coil, a forward direction additional stroke limit switch and a backward direction additional stroke limit switch, wherein, the switch contact of the forward direction additional stroke limit switch is connected in the loop of the motor backward rotation coil in series for cutting off the loop of the motor backward rotation coil; the forward direction additional stroke limit switch is set to be not later than that the forward direction stroke limit switch is triggered by the stop dog; the switch contact of the backward direction additional stroke limit switch is connected in the loop of the motor forward rotation coil in series for cutting off the loop of the motor forward rotation coil. The embodiment of the invention effectively avoids mechanical sticking or equipment loss caused by mechanical sticking by adding the scheme of additional limiting.
Description
Technical field
The present invention relates to the field, more particularly, relate to the motor positive and inverse protection loop of a kind of Cheng Kaiguan of limit.
Background technology
The motor positive and inverse control loop that the limit journey that we use is at present opened the Central Shanxi Plain comprises that motor is just changeing start button, motor counter-rotating start button, block, positive direction lead limit switch, opposite direction lead limit switch, the positive switch coil of motor and motor counter-rotating coil.After said starter motor was just changeing start button, positive switch coil running of said motor and driving device equipment were by the positive direction motion.Reach the desired location of positive direction when plant equipment after, said block triggers said positive direction lead limit switch.Breaking off the positive switch coil of motor after said positive direction lead limit switch is triggered by said block supplies power.Thereby plant equipment stops to continue to move to positive direction.Equally, after starting said motor counter-rotating start button, motor counter-rotating coil running and driving device equipment are by motion in the other direction.After plant equipment reached reciprocal desired location, said block triggered lead limit switch in the other direction.Said opposite direction lead limit switch receives said block to trigger back disconnection motor counter-rotating coil power supply.Thereby plant equipment stops to continue to motion in the other direction.
The direction of motion of above plant equipment is that power phase is essential correct by the prerequisite of direction initialization motion.When power phase connects inverse time, after starting said motor and just changeing start button, thereby the positive switch coil backward rotation of motor driving device equipment is to motion in the other direction.After arriving the opposite direction desired location, said opposite direction lead limit switch receives said block to trigger back disconnection motor counter-rotating coil power supply.Owing to trigger the positive direction position that plant equipment can't reach setting, thereby said block can't trigger said positive direction lead limit switch.So said positive direction lead limit switch can't break off the positive switch coil power supply of motor.This moment, plant equipment continued under the driving of positive switch coil to motion in the other direction, thereby caused machinery stuck.Equally, when power phase connects inverse time, behind the said starter motor counter-rotating start button, owing to trigger the opposite direction position that plant equipment can't reach setting, thus said block can't trigger lead limit switch in the other direction.Said opposite direction lead limit switch can't break off motor counter-rotating coil power supply.This moment, plant equipment continued under the driving of counter-rotating coil to the positive direction motion, thereby also can cause machinery stuck.
Machinery is stuck not only can be caused damage to the production work of equipment or influence, and might cause equipment damage.
Summary of the invention
In view of this, the invention provides a kind of power phase and connect the protection loop that also can effectively avoid machinery stuck inverse time as limit Cheng Kaiguan.
For realizing above-mentioned purpose, the utility model provides following technical scheme:
A kind of motor positive and inverse protection loop of limitting Cheng Kaiguan comprises that motor is just changeing start button, motor counter-rotating start button, block, positive direction lead limit switch, opposite direction lead limit switch, the positive switch coil of motor, motor counter-rotating coil, forward additional travel limit switch and retroactive addition lead limit switch;
The switch contact of said forward additional travel limit switch is connected in the loop of said motor counter-rotating coil; Said forward additional travel limit switch is used to break off the loop of said motor counter-rotating coil;
Said forward additional travel limit switch is set to be not later than said positive direction lead limit switch and is triggered by said block;
The switch contact of said retroactive addition lead limit switch is connected in the loop of the positive switch coil of said motor; Said retroactive addition lead limit switch is used to break off the loop of the positive switch coil of said motor;
Said retroactive addition lead limit switch is set to be not later than said opposite direction lead limit switch and is triggered by said block.
When preferably, said forward additional travel limit switch is the swing arm lead limit switch:
Said forward additional travel limit switch is located at the inboard of said positive direction lead limit switch, and said forward additional travel limit switch is set to only when the block positive movement, break off said motor counter-rotating coil;
Said retroactive addition lead limit switch is located at the inboard of said opposite direction lead limit switch, and said retroactive addition lead limit switch is set to only when the block counter motion, break off the positive switch coil of said motor.
Preferably, said forward additional travel limit switch is the swing arm lead limit switch, comprises swing arm, axle, pin;
Said swing arm is provided with the circular hole that is used to hold said axle, and is being provided with the groove that is communicated with circular hole with the vertical direction of said round hole axial;
Said pin is arranged in the groove and is fixed on the said axle.
Preferably, when said forward additional travel limit switch and retroactive addition lead limit switch are the straight-bar type lead limit switch:
Said forward stroke limit switch and forward additional travel limit switch are designed to triggered by said block simultaneously;
Said reverse stroke limit switch and retroactive addition lead limit switch are designed to triggered by said block simultaneously.
Can find out from above-mentioned technical scheme; The embodiment of the invention is through having increased the scheme of forward additional travel limit switch and retroactive addition lead limit switch; And make positive direction additional travel switch can break off the counter-rotating coil additional design, the additional travel switch can break off positive switch coil in the other direction.Thereby make limit Cheng Kaiguan connect under the anti-situation also and can make the plant equipment stop motion so that the block on the stroke breaks off the coil circuit of respective action when arriving desired location in phase sequence.Thereby effectively avoided mechanical equipment loss stuck and that bring because of machinery is stuck.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of embodiment of the invention limit Cheng Kaiguan;
Fig. 2 is the structural representation of embodiment of the invention forward additional travel limit switch 31.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention discloses the motor positive and inverse protection loop of a kind of Cheng Kaiguan of limit, to realize also can effectively avoiding machinery stuck inverse time when power phase connects.
As shown in Figure 1, the motor positive and inverse protection loop of the embodiment of the invention comprises that motor is just changeing start button, motor counter-rotating start button, block 5, positive direction lead limit switch 3, opposite direction lead limit switch 4, forward additional travel limit switch 31, retroactive addition lead limit switch 41, the positive switch coil of motor and motor counter-rotating coil; Said forward additional travel limit switch 31 is located at the inboard of said positive direction lead limit switch 3.Like this; The said block 5 that being used on plant equipment triggered travel switch is moving to positive direction; Promptly when 3 motions of said positive direction lead limit switch, could arrive said positive direction lead limit switch 3 after at first will passing through and trigger said forward additional travel limit switch 31.The switch contact of said forward additional travel limit switch 31 is connected in the loop of said motor counter-rotating coil, and said forward additional travel limit switch 31 only is set to when said block 5 positive movements, to break off the said motor coil that reverses.
Said retroactive addition lead limit switch 41 is located at the inboard of said opposite direction lead limit switch 4; Like this; The said block 5 that being used on plant equipment triggered travel switch is moving to opposite direction; Promptly when said opposite direction lead limit switch 4 moves, at first to pass through and trigger said retroactive addition lead limit switch 41 and could arrive said opposite direction lead limit switch 4.The switch contact of said retroactive addition lead limit switch 41 is connected in the loop of the positive switch coil of said motor, and said retroactive addition lead limit switch 41 only is set to when said block 5 counter motions, to break off the positive switch coil of said motor.
As shown in Figure 2, the said forward additional travel limit switch 31 in the embodiment of the invention can be the swing arm lead limit switch.Its structure comprises swing arm 33, axle 34, pin 35.Said swing arm 33 is provided with the circular hole 36 that is used to hold said axle 34, and is provided with the groove 37 that is communicated with circular hole in the direction with said circular hole 36 axis normal; Said pin is arranged in the said groove 37 and is fixed on the said axle 34.Like this; When said swing arm 33 is stirred by the said block 5 that moves along positive direction and when rotating counterclockwise around said axle 34; Said pin 35 will make said axle 34 rotate counterclockwise under the impetus on the right edge edge of said groove 37; And then the rotation of said axle 34 will trigger the switch contact in the said motor counter-rotating coil that said forward additional travel limit switch 31 connected.Make said motor counter-rotating coil circuit break off.
When the motion in the other direction of said block 5; Said swing arm 33 is stirred along the said block 5 that moves in the other direction and when clockwise rotating around said axle 34; Because the left side of said groove 37 is not used in the edge that promotes said pin 35, said pin 35 will can not be pushed, thereby said axle 34 is rotated; So can not trigger the switch contact in the said motor counter-rotating coil that said forward additional travel limit switch 31 connected, be used for breaking off said motor counter-rotating coil.
The structure of said retroactive addition lead limit switch 41 and said forward additional travel limit switch 31 are similar.It can be opposite with said forward additional travel limit switch 31 by the direction that said block 5 triggers; Promptly have only when active force being arranged when said block 5 motion in the other direction and to said retroactive addition lead limit switch 41; Can make said retroactive addition lead limit switch 41 trigger the switch contact of the positive switch coil of said forward motor, be used for breaking off the positive switch coil of said motor.
Thereby; The additional travel limit switch structure of the embodiment of the invention makes that said block 5 only could the trigger switch contact when specific direction moves, and the wire loop that said forward additional travel limit switch 31 or retroactive addition lead limit switch 41 are connected breaks off.
In embodiments of the present invention, when power phase is correct, need to press said motor and just changeing start button under the just commentaries on classics situation, the positive switch coil of then said motor gets electric, and motor just changes.The said block 5 of plant equipment promptly moves to said positive direction lead limit switch 3 to positive direction; When to during near extreme position said block 5 at first trigger said forward additional travel limit switch 31; But be connected on owing to said forward additional travel limit switch 31 switch contacts in the loop of said motor counter-rotating coil, the positive switch coil of said motor that breaks not open, motor will remain in operation;, triggers said block 5 said positive direction lead limit switch 3 when reaching the limit of the position; Just going back in the road because positive direction lead limit switch 3 switch contacts are strings, thereby making the positive switch coil outage of said motor, the said block 5 of plant equipment stops to the positive direction motion.Press said motor counter-rotating start button then; Said motor counter-rotating coil gets the motor counter-rotating; The said block 5 of plant equipment moves to opposite direction from the extreme position of positive direction; What at this moment said block 5 was at first run into is forward additional travel limit switch 31; But because effective triggering of said forward additional travel limit switch 31 can only trigger when positive direction move and break off onset at said block 5, so 31 this moments of said forward additional travel limit switch and fail to break off the said motor coil that reverses.The said block 5 of plant equipment will continue to motion in the other direction this moment; When said block 5 at first triggers said retroactive addition lead limit switch 41; But owing to said retroactive addition lead limit switch 41 is connected in the positive switch coil of said motor, the said motor counter-rotating coil that breaks not open, motor will remain in operation; When said block 5 reaches capacity the position, trigger said opposite direction lead limit switch 4, make said motor counter-rotating coil blackout.Thereby make the said block 5 of plant equipment stop to motion in the other direction.
When power phase connects inverse time, to press said motor and just changeing start button, the positive switch coil of said motor gets electric, the motor direction of rotation also will change because power phase connects inverse time, and motor will just not be then be counter-rotating.At this moment plant equipment will be to motion in the other direction; Said block 5 at first triggers said retroactive addition lead limit switch 41; Because the switch contact of said retroactive addition lead limit switch 41 is to be connected in the positive switch coil of said motor; Thereby make the positive switch coil outage of said motor, said block 5 motion in the other direction of tool equipment stops.Can not form that to form machinery because making the outage of the positive switch coil of said motor stuck, thereby play the effect of protection plant equipment.Press said motor counter-rotating start button then; Because phase sequence connects instead; So said motor counter-rotating coil gets motor will be counter-rotating but just change; At this moment the said block 5 of plant equipment is to the positive direction motion, and what at this moment said block 5 at first triggered is said forward additional travel limit switch 31, because said forward additional travel limit switch 31 switch contacts are to be connected in the said motor counter-rotating coil; Thereby make said motor counter-rotating coil blackout, the said block 5 positive directions motion of plant equipment stops.Can not make rotating protection loop malfunctioning so how embodiment of the invention power phase changes, it is stuck to have avoided forming machinery, thereby has played protective effect.
In another embodiment, the forward additional travel limit switch of the embodiment of the invention and retroactive addition lead limit switch can also be straight-bar type limit Cheng Kaiguan.
The switch contact of the forward additional travel limit switch of the embodiment of the invention is connected in the loop of motor counter-rotating coil, and the switch contact of retroactive addition lead limit switch is connected in the loop of the positive switch coil of motor.
The said forward additional travel limit switch of the embodiment of the invention is arranged side by side with said forward stroke limit switch is in the same place, and said retroactive addition lead limit switch is arranged side by side with said reverse stroke limit switch is in the same place.When power phase connects anti-the time; When pressing the forward start button; Block can be because the forward direction of motor rotation moves for counter-rotating in the opposite direction, can trigger said retroactive addition lead limit switch and said reverse stroke limit switch simultaneously when arriving reciprocal extreme position.Because said retroactive addition lead limit switch is used for breaking off positive switch coil loop, so just the switch coil loop can cut off the power supply this moment, thereby makes that said block stops to continue the trend to the opposite direction motion, and then avoided mechanical stuck.In like manner, when pressing reverse start button, said block can trigger said forward additional travel limit switch and said forward stroke limit switch when arriving the direct limit position simultaneously.Because said forward additional travel limit switch is used for breaking off the counter-rotating wire loop, thus counter-rotating can cut off the power supply wire loop at this moment, thereby make that said block stops to continue the trend to the positive direction motion, and then avoided mechanical stuck.
In sum; The embodiment of the invention is through being provided with forward additional travel limit switch and retroactive addition lead limit switch; And making said forward additional travel limit switch when the block of plant equipment moves to desired location, break off the scheme of counter-rotating coil, said retroactive addition lead limit switch breaks off positive switch coil when the block of plant equipment moves to desired location.Make to connect and also can not cause plant equipment stuck in anti-, and then also just avoided because the damage of the stuck plant equipment that causes of plant equipment because of the coil circuit that can't break off the work of switching at power phase.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (4)
1. limit the motor positive and inverse of Cheng Kaiguan to protect the loop for one kind; It is characterized in that, comprising: motor is just changeing start button, motor counter-rotating start button, block, positive direction lead limit switch, opposite direction lead limit switch, the positive switch coil of motor, motor counter-rotating coil, forward additional travel limit switch and retroactive addition lead limit switch;
The switch contact of said forward additional travel limit switch is connected in the loop of said motor counter-rotating coil; Said forward additional travel limit switch is used to break off the loop of said motor counter-rotating coil;
Said forward additional travel limit switch is set to be not later than said positive direction lead limit switch and is triggered by said block;
The switch contact of said retroactive addition lead limit switch is connected in the loop of the positive switch coil of said motor; Said retroactive addition lead limit switch is used to break off the loop of the positive switch coil of said motor;
Said retroactive addition lead limit switch is set to be not later than said opposite direction lead limit switch and is triggered by said block.
2. according to the said protection of claim 1 loop, it is characterized in that, when said forward additional travel limit switch is the swing arm lead limit switch:
Said forward additional travel limit switch is located at the inboard of said positive direction lead limit switch, and said forward additional travel limit switch is set to only when the block positive movement, break off said motor counter-rotating coil;
Said retroactive addition lead limit switch is located at the inboard of said opposite direction lead limit switch, and said retroactive addition lead limit switch is set to only when the block counter motion, break off the positive switch coil of said motor.
3. according to the said protection of claim 2 loop, it is characterized in that said forward additional travel limit switch is the swing arm lead limit switch, comprises swing arm, axle, pin;
Said swing arm is provided with the circular hole that is used to hold said axle, and is being provided with the groove that is communicated with circular hole with the vertical direction of said round hole axial;
Said pin is arranged in the groove and is fixed on the said axle.
4. according to the said protection of claim 1 loop, it is characterized in that, when said forward additional travel limit switch and retroactive addition lead limit switch are the straight-bar type lead limit switch:
Said positive direction lead limit switch and forward additional travel limit switch are designed to triggered by said block simultaneously;
Said opposite direction lead limit switch and retroactive addition lead limit switch are designed to triggered by said block simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101685109A CN101645682B (en) | 2009-08-21 | 2009-08-21 | Motor forward and backward rotation protection loop of limited switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101685109A CN101645682B (en) | 2009-08-21 | 2009-08-21 | Motor forward and backward rotation protection loop of limited switch |
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| Publication Number | Publication Date |
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| CN101645682A CN101645682A (en) | 2010-02-10 |
| CN101645682B true CN101645682B (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101685109A Active CN101645682B (en) | 2009-08-21 | 2009-08-21 | Motor forward and backward rotation protection loop of limited switch |
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| CN110474579B (en) * | 2018-05-11 | 2022-08-30 | 佛山海尔滚筒洗衣机有限公司 | Control device for rotation of stepping motor |
| CN109687768B (en) * | 2018-12-29 | 2020-07-10 | 深圳市越疆科技有限公司 | Detection method, device and controller for striker type band-type brake |
| CN110772978A (en) * | 2019-09-17 | 2020-02-11 | 天津市华邦科技发展有限公司 | Electrical control system for catalytic oxidation of high-concentration organic gas tail gas |
| CN116613925B (en) * | 2023-06-03 | 2024-05-17 | 深圳市格尔机电科技有限公司 | Stroke limit control method for electric push rod |
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| CN101645682A (en) | 2010-02-10 |
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