CN114688242B - Reversing control mechanism - Google Patents
Reversing control mechanism Download PDFInfo
- Publication number
- CN114688242B CN114688242B CN202210289175.3A CN202210289175A CN114688242B CN 114688242 B CN114688242 B CN 114688242B CN 202210289175 A CN202210289175 A CN 202210289175A CN 114688242 B CN114688242 B CN 114688242B
- Authority
- CN
- China
- Prior art keywords
- limit
- reverse
- switch
- limit switch
- signal
- Prior art date
- 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.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 81
- 230000033001 locomotion Effects 0.000 claims abstract description 101
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims description 24
- 230000001960 triggered effect Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 17
- 230000002159 abnormal effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000036544 posture Effects 0.000 description 2
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention relates to the technical field of limit protection, and aims to provide a reversing control mechanism which solves the technical problem that a limit switch in the prior art is easy to limit and lose efficacy due to stroke errors caused by angle errors when being opened and closed in a limit protection mode. The reversing control mechanism comprises a limit switch, a reciprocating part, a driving mechanism for driving the reciprocating part and a controller, wherein the controller is used for receiving a limit signal of the limit switch to control the driving mechanism, and the limit switch comprises a forward limit switch and a reverse limit switch; the reciprocating part is provided with a forward movement limit position I and a reverse movement limit position I; when the reciprocating part moves to the forward movement limit position, the forward limit switch correspondingly sends out a forward limit signal, and when the reciprocating part moves to the reverse movement limit position, the reverse limit switch sends out a reverse limit signal. The controller has a first control mode and a second control mode, and the first control mode and the second control mode are used for monitoring the position of the reciprocating motion piece.
Description
Technical Field
The invention relates to the technical field of limit protection, in particular to a reversing control mechanism.
Background
When the motor drives the rotary or linear motion equipment, in order to prevent excessive rotation or meet the actual motion distance requirement, limit protection is needed in the equipment, and the equipment subjected to limit protection can perform reciprocating motion within a certain set distance. The boss is utilized to trigger the limit switch, which is a common mechanical limit protection scheme, and is particularly suitable for severe environments such as greasy dirt pollution. When the boss moves to the limit position, the micro switch is triggered to disconnect the control signal, so that protection is realized.
Common limit switch structure is as shown in fig. 1, and limit switch includes shell and base, still includes the conductive structure who sets up in the shell, and wherein, conductive structure includes different circular telegram return circuits to can carry out the conductive line break-make of different gesture, and then send out different position appearance signals. As shown in fig. 1, the lever arm 16 extends obliquely out of the casing of the limit switch, the front end of the lever arm 16 is used for setting rollers (not shown in the figure), the rollers can slide on different matching surfaces, the switch 10 can be pressed when the force applied by the rollers changes, the switch 10 presses the movable piece 18 to displace through the effective travel inwards of the switch 10, the movable piece 18 is further made to press the elastic piece 19, the elastic piece 19 drives the electric contact 17 to separate and switch the normally open port and the normally closed port, and the circuit switching of the limit switch is realized.
The invention patent with the authorized bulletin number of CN106992086B discloses a rotary micro-motion limit switch, which comprises a base, a first movable assembly, a second movable assembly and a movable contact assembly, wherein the first movable assembly, the second movable assembly and the movable contact assembly are arranged in the base and are mutually linked, two ends of the second movable assembly are respectively propped against the first movable assembly and the movable contact assembly, the first movable assembly axially moves and drives one end of the second movable assembly propped against the first movable assembly to swing, and the second movable assembly pushes the movable contact assembly to rotate around the pivot of the movable contact assembly and a connector or an adapter. Because the rotating block can rotate a certain angle in the movable rod, the contact of the boss of the rotating block and the boss at the side edge of the shell can improve the action parameter of the switch, and the force balance position of the rotating block and the second movable assembly can form force balance before the second movable assembly and the movable contact assembly, so that the phenomenon that the switch is powered off or flashes upwards due to the force balance when the contact assembly rotates can be effectively prevented, and the rotary micro-motion limit switch is more sensitive, safe and reliable.
According to improvement of the limit switch and optimization of the structure of the limit switch, the limit switch is widely applied to the protection of equipment motion, but when the limit switch is used for limiting protection of bidirectional motion equipment, a certain angle error exists when the effective closing state and the effective opening state between the switch contacts are switched due to the travel clearance of the limit switch, namely the effective opening position and the effective closing position of the limit switch are not on the same point, and therefore the motion position precision after equipment reversing can be limited. As shown in fig. 2, taking the limiting of the rotation angle as an example, before and after limiting triggering in the reversing process, when the roller 11 on the limit switch is in the sliding fit process with the moving part, an angle error alpha is usually caused by the travel of the roller 11 when the roller 11 is in the position for controlling the normally open and normally closed of the limit switch from triggering to switching state. The mechanical switch type trigger limit is a forward switch state or a reverse switch state, the angle alpha between the roller 11 and the matched trigger position can theoretically occur, and the value of alpha is equal in theory during forward and reverse movement. However, since the roller of the limit switch has displacement error and a matching angle exists between the lever arm and the roller, the limit switch may not be triggered in place or fail due to the error. In theory, the effective travel of the boss chamfering angle, boss height and travel switch can be changed, the travel error can be improved, but the improvement degree is limited, and the opening and closing angle error of a single limit switch is difficult to thoroughly eliminate. When a single limit switch is not triggered in place and fails, limit protection of equipment also fails directly, so that the equipment rotates excessively, and the running risk of the equipment is caused.
Disclosure of Invention
The invention aims to provide a reversing control mechanism which solves the technical problem that a limit switch in the prior art is easy to limit and lose efficacy due to stroke errors caused by angle errors when limit protection opening and closing are carried out.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the reversing control mechanism comprises a limit switch, a reciprocating part, a driving mechanism for driving the reciprocating part and a controller, wherein the controller is used for receiving a limit signal of the limit switch to control the driving mechanism; the reciprocating part is provided with a forward movement limit position I and a reverse movement limit position I, when the reciprocating part moves to the forward movement limit position, the forward limit switch correspondingly sends out a forward limit signal, and when the reciprocating part moves to the reverse movement limit position, the reverse limit switch sends out a reverse limit signal; the controller is provided with a first control mode and a second control mode, wherein the first control mode is used for monitoring the position of the reciprocating motion part moving forward, so that the forward limit switch is in a forward limit monitoring state, and the second control mode is used for monitoring the position of the reciprocating motion part moving backward, so that the reverse limit switch is in a reverse limit monitoring state; the control method executed by the controller in the mode one comprises the following steps: monitoring and judging a forward limit signal sent by a forward limit switch; if the forward limiting signal jumps to be effective, triggering a first direction switching signal, controlling a driving mechanism to drive a reciprocating motion piece to switch from forward motion to reverse motion, and if the forward limiting signal jumps to be effective and then jumps to be ineffective, switching a control mode to a second mode; the control method executed by the controller in the mode two comprises the following steps: monitoring and judging a reverse limit signal sent by a reverse limit switch; and if the reverse limit signal jumps to be effective, triggering a direction switching signal II, controlling the driving mechanism to drive the reciprocating motion piece to switch from reverse motion to forward motion, and if the reverse limit signal jumps to be effective and then jumps to be ineffective, switching the control mode to the mode I.
The beneficial effects are that: through the limit switch of two different positions to and set up with limit switch matched with forward, reverse removal extreme position, single limit switch only triggers unidirectional limit protection, thereby no longer need consider the delay time that reciprocating motion spare crossed limit switch when judging that limit signal is effective, thereby eliminate the travel error that causes because of limit switch's gyro wheel stroke and angle error when switching-over, not only protect limit switch, make the trigger of switching-over more accurate simultaneously, thereby can promote the spacing protection effect of equipment. Compared with the prior art that a single limit switch is adopted to carry out limit control in two directions, the invention improves the position accuracy of the reciprocating motion piece control and effectively avoids angle errors.
Preferably, the reciprocating member further has a forward movement limit position two and a reverse movement limit position two, the distance between the forward movement limit position two and the reverse movement limit position two is smaller than the distance between the forward movement limit position two, when the reciprocating member moves to the forward movement limit position one and the reverse movement limit position two, the forward limit switch correspondingly sends forward limit signals, and when the reciprocating member moves to the reverse movement limit position one and the forward movement limit position two, the reverse limit switch correspondingly sends reverse limit signals; the control method executed by the controller in the mode one further comprises: monitoring and judging a reverse limit signal sent by a reverse limit switch; after the first trigger direction switching signal, if the reverse limiting signal is valid, starting forward redundancy safety protection and stopping; under the condition that the first direction switching signal is not triggered, if the reverse limiting signal is effective, starting forward redundancy safety protection and stopping; the control method executed by the controller in the second mode further comprises the following steps: monitoring and judging a forward limit effective signal sent by a forward limit switch; after the second trigger direction switching signal, if the forward limiting signal is valid, starting reverse redundancy safety protection and stopping; and under the condition that the second direction switching signal is not triggered, if the forward limiting signal is effective, starting reverse redundancy safety protection and stopping. Two limit switches can utilize another limit switch to carry out redundant protection when one of them limit switch inefficacy or motor trouble, through setting up forward, reverse removal extreme position two, avoid limit switch to remove to the forward, reverse removal extreme position one because of the adverse consequence that the limit inefficacy caused to further promote the reliability of equipment limit protection.
Preferably, the reciprocating member is a linear member. The device which moves linearly and reciprocally is effectively limited and protected.
Preferably, the reciprocating member is a rotary member. And the device for rotating and reciprocating motion is effectively limited and protected.
Preferably, the reciprocating member is a reversing wheel, a boss is arranged on the periphery of the reversing wheel, and the boss comprises: the first forward switch switching lug boss and the second forward switch switching lug boss which enable the forward limit switch to switch the on-off state, and the first reverse switch switching lug boss and the second reverse switch switching lug boss which enable the reverse limit switch to switch the on-off state are arranged on the same circumference at intervals in the circumferential direction, and the forward limit switch is arranged between the first forward switch switching lug boss and the second forward switch switching lug boss; the first reverse switch switching boss and the second reverse switch switching boss are arranged on the same circumference at intervals, and the reverse limit switch is arranged between the first reverse switch switching boss and the second reverse switch switching boss; the distance between the first forward switch switching boss and the first reverse switch switching boss is smaller than the distance between the second forward switch switching boss and the second reverse switch switching boss, the position of the first forward switch switching boss, which is moved to trigger the forward limit switch, forms the forward movement limit position I, the position of the second forward switch switching boss, which is moved to trigger the forward limit switch, forms the forward movement limit position II, the position of the first reverse switch switching boss, which is moved to trigger the reverse limit switch, forms the reverse movement limit position I, and the position of the second reverse switch switching boss, which is moved to trigger the reverse limit switch, forms the reverse movement limit position II. Two limit switches correspond two switching bosses respectively, when one limit switch fails, the limit circuit switching can be completed by the other limit switch and the switching boss corresponding to the position of the other limit switch, and the switching bosses on the same side are all positioned on the same circumference position, so that the limit switch is effectively protected, and the limit switch has a compact structure and is firmly matched.
Preferably, the limit switch is a mechanical limit switch. Compared with limit switches such as electronic induction type or photoelectric type, the mechanical limit switch formed by the mechanical mechanism can save cost and simultaneously can rapidly perform on-off limit protection.
Preferably, the limit switch comprises a lever arm capable of swinging to realize the state switching of the limit switch, and a roller for contacting with the reciprocating member is arranged on the lever arm. The lever arm can carry out the atress oppression to the switch through lever principle when the atress, makes limit switch its inside communication circuit, and the gyro wheel of connection on the lever arm can carry out sliding fit and carry out the atress transmission with reciprocating motion spare effectively, simple structure, and it is convenient to set up.
Preferably, the forward limit switch and the reverse limit switch are arranged in parallel along the axial direction of the reversing wheel. The limit switches arranged in parallel are convenient to install, compact in structure and close in fit.
Preferably, the boss has a guide slope for contacting the limit switch in a direction in which the reciprocating member moves to guide the limit switch to switch the on-off state, and the guide slope is a slope. The upper setting of boss guides domatic can make limit switch's normally closed end disconnection along with the slope change of domatic, reaches limit protection's purpose, reduces limit switch's damage. The linear distance or the angular distance between the switch switching bosses on the reciprocating motion piece can be obtained by processing according to the working distance or the angle of actual limit protection.
Preferably, the driving mechanism is a driving motor. The driving motor is common electric control equipment, is convenient to install and operate, can provide larger driving force, and can effectively drive the reciprocating motion piece.
Drawings
FIG. 1 is a schematic diagram of a limit switch in the prior art;
fig. 2 is a schematic diagram of an angle error of a limit switch roller in the prior art when limit protection is performed;
fig. 3 is a schematic structural diagram of a reversing wheel and a limit switch in embodiment 1 of the reversing control mechanism provided by the invention;
FIG. 4 is a schematic diagram of the limit switch in FIG. 3;
fig. 5 is a schematic view of the motion state of the roller of the reversing wheel in the embodiment 1 of the reversing control mechanism when the reversing wheel is switched from reverse rotation to forward rotation (the transverse arrow in the figure indicates the rotation direction of the reversing wheel);
fig. 6 is a schematic view of the movement state of the roller of the reversing wheel in the embodiment 1 of the reversing control mechanism when the reversing wheel is switched from forward rotation to reverse rotation (the transverse arrow in the figure indicates the rotation direction of the reversing wheel);
fig. 7 is a schematic diagram of the reversing position of the roller of the reversing wheel in the embodiment 1 of the reversing control mechanism when the forward limit switch fails (the arrow in the figure indicates the rotation direction of the reversing wheel);
fig. 8 is a schematic diagram of the reversing position of the roller of the reversing wheel in the embodiment 1 of the reversing control mechanism when the reversing limit switch fails (the arrow in the figure indicates the rotation direction of the reversing wheel);
Fig. 9 is a logic block diagram of the limit monitor and control circuit in embodiment 1 of the commutation control mechanism;
FIG. 10 is a waveform diagram of a limit signal, a direction switch signal, and a redundancy protection signal under normal commutation conditions;
FIG. 11 is a diagram of a forward redundancy protection trigger waveform when the drive mechanism is abnormal and the limit switch is normal;
FIG. 12 is a diagram of a forward redundancy protection trigger waveform when the drive mechanism is normal and the forward limit switch is abnormal;
FIG. 13 is a logic block diagram of forward limit monitoring and redundancy protection processing;
FIG. 14 is a reverse redundancy protection trigger waveform when the drive mechanism is abnormal and the limit switch is normal;
FIG. 15 is a diagram of reverse redundancy protection trigger waveforms for normal driving mechanism and abnormal reverse limit switch;
fig. 16 is a logic block diagram of the reverse limit monitoring and redundancy protection process.
Reference numerals illustrate:
1. a reversing wheel; 2. a forward limit switch; 3. a reverse limit switch; 4. a first forward switch switching boss; 5. a first reverse switch switching boss; 6. a second forward switch switching boss; 7. a second reverse switch switching boss; 8. a guide slope; 9. a terminal; 10. a switch; 11. a roller; 12. a bracket; 13. a base; 14. forward limit switch roller; 15. reverse limit switch roller; 16. a lever arm; 17. an electrical contact; 18. a movable piece; 19. and the elastic sheet.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
In this embodiment, the reversing control mechanism includes a limit switch, a reciprocating member, a driving mechanism for driving the reciprocating member, and a controller connected with the limit switch and receiving a limit switch signal, where the controller is configured to receive the limit switch limit signal to control the driving mechanism to control the motion state of the reciprocating member. In this embodiment, the limit switches are mechanical limit switches, as shown in fig. 3, two mechanical limit switches are arranged in parallel, one of the mechanical limit switches is a forward limit switch 2, and the other is a reverse limit switch 3. The two mechanical limit switches are fixedly arranged in the reversing control mechanism and do not reciprocate along with the reciprocating piece.
As shown in fig. 4, the mechanical limit switch comprises an externally exposed terminal 9, a switch 10, a bracket 12, a base 13, a roller 11 for rolling fit with a reciprocating member, and a lever arm 16 capable of swinging inside to switch the state of the limit switch, wherein the roller 11 is arranged at one end of the lever arm 16 extending out of the limit switch. The assembly method and the use method of the limit switch are all in the prior art, and are not described herein.
As shown in fig. 3, the reciprocating member is a disc-shaped reversing wheel 1, the reversing wheel 1 can be driven by a driving mechanism to rotate around the center of a circle, and the reversing wheel 1 can change the rotating direction of the normally open contact trigger reversing marks of the mechanical limit switch to complete reversing, namely, the reciprocating member is a rotating member. As shown in fig. 3, a switch switching boss on the outer circumference is arranged on the reversing wheel 1, and the switch switching boss is used for switching the on-off state of the limit switch, wherein the switch switching boss comprises a first forward switch switching boss 4 and a second reverse switch switching boss 5, which correspond to the forward limit switch 2 on the same circumference. The switch switching boss further comprises a first reverse switch switching boss 7 and a second forward switch switching boss 6 of the reverse limit switch, which correspond to the reverse limit switch on the same circumference. The first forward switch switching boss 4 moves to the position triggering the forward limit switch 2 to form a forward movement limit position I where the reversing wheel 1 can move forward, the second forward switch switching boss 6 moves to the position triggering the forward limit switch 2 to form a forward movement limit position II, the first reverse switch switching boss 7 moves to the position triggering the reverse limit switch 3 to form a reverse movement limit position I, and the second reverse switch switching boss 5 moves to the position triggering the reverse limit switch 3 to form a reverse movement limit position II.
In this embodiment, each switch switching boss has a guiding slope 8 disposed on the circumference of the rotation direction of the reversing wheel 1, the guiding slope 8 of each boss is an inclined plane, and the guiding slope 8 is used for contact matching with a roller 11 of the limit switch, so that the limit switch triggers an internal contact to generate a level jump, thereby sending out a signal.
As shown in fig. 3, the forward limit switch 2 is disposed between the first forward switch switching boss 4 and the second forward switch switching boss 6, the reverse limit switch 3 is disposed between the first reverse switch switching boss 7 and the second reverse switch switching boss 5, and the forward limit switch 2 and the reverse limit switch 3 are juxtaposed in the axial direction of the reversing wheel 1. The reversing control mechanism further comprises a driving mechanism connected with the reversing wheel 1 and a controller connected with the driving mechanism, and the controller can receive the forward limiting signal and the reverse limiting signal so as to control the driving mechanism to rapidly switch the running state of the reversing wheel 1.
In this embodiment, the controller has a first control mode and a second control mode, where the first control mode is used for monitoring the position of the reciprocating member moving forward, so that the forward limit switch 2 is in a forward limit monitoring state, and the second control mode is used for monitoring the position of the reciprocating member moving backward, so that the reverse limit switch 3 is in a reverse limit monitoring state. As shown in a schematic diagram of a control circuit of the controller in fig. 9, the control circuit firstly forms a shaping circuit of an input signal through a multichannel photoelectric coupler, arranges normally open and normally closed end signals of a limit switch into square wave signals with high and low levels, then sends the shaped forward and reverse limit signals into an IO port of a singlechip, and the singlechip captures the signals by the IO port to judge the high and low levels of the signals and generates a driving control signal through limit protection logic to control a driving mechanism to drive the motion state of a reciprocating part and can communicate with a computer through a serial port.
The forward limit switch (i.e., the forward detection micro switch in fig. 9) sends out forward limit signals one and two (shown as forward limit signals 1 and 2 in the drawings of the specification) when the forward limit switch is normally open and normally closed, and the forward limit signals one and two are signals with opposite levels, so that the forward limit signals one and two respectively represent that the forward limit signal is effective and the forward limit signal is ineffective when the forward limit signal is high.
The reverse limit switch (i.e. the reverse detection micro switch in fig. 9) sends out a first reverse limit signal and a second reverse limit signal (shown as reverse limit signals 1 and 2 in the drawing of the specification) respectively when the switch is normally opened and normally closed. The first and second reverse limit signals are two signals with opposite levels, so that the first and second reverse limit signals respectively represent that the first reverse limit signal is effective and the second reverse limit signal is ineffective when the first reverse limit signal and the second reverse limit signal are high.
In this embodiment, the distance between the first forward switch switching boss 4 and the second forward switch switching boss 6 is equal to the distance between the first reverse switch switching boss 7 and the second reverse switch switching boss 5, the first forward switch switching boss 4 and the first reverse switch switching boss 7 are staggered in the axial direction of the reversing wheel 1, and the second reverse switch switching boss 5 and the second forward switch switching boss 6 are likewise staggered in the axial direction of the reversing wheel 1. The distance between the first forward switching boss 4 and the first reverse switching boss 7 is smaller than the distance between the second forward switching boss 6 and the second reverse switching boss 5. When the reversing wheel 1 rotates positively, the first forward movement limit position is the final limit position of the reversing wheel 1, when the roller 11 of the forward limit switch 2 is matched with the inclined plane of the first forward movement limit position to move upwards along the inclined plane, the level of the forward limit switch 2 jumps, the forward limit switch 2 sends a forward limit signal to the controller to trigger the first direction switching signal, the controller controls the driving mechanism to enable the driving mechanism to drive the reversing wheel 1 to switch from forward movement to reverse movement, and if the forward limit signal jumps to be effective and then jumps to be ineffective, the controller mode is switched to the second mode.
As shown in fig. 10, the waveform diagram of the limit switch signal and the reversing signal is shown under the normal reversing condition, wherein when the reversing wheel 1 rotates forward, the controller is in a first control mode, the forward limit switch 2 is in a forward movement limit monitoring state, when the roller 11 of the forward limit switch 2 contacts the inclined plane on the first forward movement limit position, the normally open and normally closed contacts in the forward limit switch 2 drive the lever arm 16 to rise due to the roller 11 to generate level jump, the first forward limit signal jumps to be high level, the control method executed by the controller at the moment is to monitor and judge the first forward limit signal sent by the forward limit switch 2, namely, the forward limit signal jumps to be effective, the first direction switching signal is triggered, the controller controls the driving mechanism to drive the reciprocating motion piece to switch from forward movement to reverse movement, after the short distance of the inclined plane, namely the trigger stroke of the roller 11 of the limit switch, the forward limit switch 2 switches back to a low level, at the moment, the reversing wheel 1 starts to move reversely, the controller switches to a control mode II, the reverse limit switch 3 enters a reverse movement limit monitoring state, when the roller 11 of the reverse limit switch 3 contacts the inclined plane on the first reverse movement limit position, normally open and normally closed contacts in the reverse limit switch 3 drive the lever arm 16 to lift up due to the roller 11 to generate level jump, the first reverse limit signal jumps to a high level, the control method executed by the controller at the moment is to monitor and judge the first reverse limit signal sent by the reverse limit switch 3, namely the jump of the reverse limit signal is valid, the second direction switching signal is triggered, the controller controls the driving mechanism to drive the reciprocating part to switch from reverse movement to forward movement, after the short distance of the inclined plane, namely the trigger stroke of the roller 11 of the limit switch, the reverse limit switch 3 is switched back to a low level, the reversing wheel 1 starts to move forward at the moment, the controller is switched to a control mode I, the forward limit switch 2 enters a forward movement limit monitoring state again, and the cyclic reciprocation is the waveform diagram of the limit switch signal and the reversing signal under the normal reversing condition.
As shown in fig. 10, when the controller is in the control mode, the first positive limit signal of the positive limit switch 2 is a positive limit effective signal, the positive limit effective signal is low level when the reversing wheel 1 moves normally and positive limit switch 2 is switched to high level when the first positive limit switch 2 triggers reversing, the second positive limit signal is a positive limit ineffective signal, the positive limit ineffective signal is high level when the reversing wheel 1 moves normally and positive limit switch 2 triggers reversing, the positive limit ineffective signal is invalid, and the reversing wheel 1 reverses. When the controller is in a second control mode, a first reverse limit signal of the reverse limit switch 3 is a reverse limit effective signal, the reverse limit effective signal is low level when the reversing wheel 1 moves normally in the reverse direction, the reverse limit effective signal is switched to high level when the reverse limit switch 3 triggers reversing at the first reverse movement limit position, the reverse limit switch 3 simultaneously has a second reverse limit signal, the second reverse limit signal is a reverse limit ineffective signal, the reverse limit ineffective signal is high level when the reversing wheel 1 moves normally in the reverse direction, at the moment, the reversing wheel 1 is positively limited and ineffective, the reverse limit ineffective signal is switched to low level when the reverse limit switch 3 triggers reversing at the first reverse movement limit position, and the reverse limit ineffective signal is ineffective. Therefore, the second forward limiting signal and the second reverse limiting signal are both limiting invalid signals, and the two limiting invalid signals are used for avoiding redundant protection false triggering of the reversing control mechanism.
In this embodiment, the controller of the reversing control mechanism is also capable of initiating redundant safety protection, and is directly stopped during operation of the steering wheel. The triggering conditions of the redundant safety protection are generally two cases: (1) The driving mechanism is abnormal and can not drive the reversing mechanism to perform reversing operation; (2) The limit switch is damaged, and a limit signal cannot be sent out after the limit switch reaches the movement limit position; when any one of the two conditions exists, the controller can control the reversing driving mechanism to stop, so that redundancy protection is realized. The redundancy protection control method executed by the controller in the first control mode comprises the following steps: monitoring and judging a reverse limit signal sent by the reverse limit switch 3; after the first trigger direction switching signal, if the reverse limiting signal is valid, starting forward redundancy safety protection and stopping; under the condition that the first direction switching signal is not triggered, if the reverse limiting signal is effective, starting forward redundancy safety protection and stopping. The control method executed by the controller in the second control mode comprises the following steps: monitoring and judging a forward limit effective signal sent by the forward limit switch 2; after the second trigger direction switching signal, if the forward limiting signal is valid, starting reverse redundancy safety protection and stopping; and under the condition that the second direction switching signal is not triggered, if the forward limiting signal is effective, starting reverse redundancy safety protection and stopping.
As shown in fig. 10, if all the components of the reversing drive mechanism are normal, the redundant safety protection signal is in a low-level non-triggered state. In the case of triggering the redundancy protection, as shown in fig. 11 and fig. 12, the redundancy protection of the forward motion of the reversing wheel 1 is taken as an example, in fig. 11, the reversing wheel 1 rotates forward, the driving mechanism is abnormal, the limit switch works normally, when the reversing wheel 1 rotates forward to the limit switch 2 reaches the forward motion limit position, the forward limit signal 1 jumps to a high level, the forward limit signal two jumps to a low level, the forward limit effective signal triggers, the controller obtains the direction switching signal one, however, because the driving mechanism is abnormal, the reversing wheel 1 still continues to rotate forward, when the roller 11 of the reversing wheel 1 rotates forward to the reverse limit switch 3 contacts with the inclined plane of the forward motion limit position two, the reverse limit signal one jumps to a high level, the reverse limit signal two jumps to a low level, the reverse limit signal at this time is received by the controller, the controller starts the forward redundancy protection, the forward redundancy protection signal is a high level, and the controller controls the reversing mechanism to stop. In fig. 12, the reversing wheel 1 rotates forward, the driving mechanism is normal, but the forward limit switch 2 fails, when the reversing wheel 1 rotates forward until the forward limit switch 2 reaches the forward movement limit position, the forward limit switch 2 does not jump, the forward limit signals I and II do not change, the reversing wheel 1 continues to rotate forward, when the roller 11 of the reversing wheel 1 rotates forward to the reverse limit switch 3 contacts with the inclined plane of the forward movement limit position II, the reverse limit signal I jumps to be high level, the reverse limit signal II jumps to be low level, the reverse limit signal at the moment is received by the controller, the controller starts forward redundancy safety protection, the forward redundancy safety protection signal is high level, and the controller controls the reversing mechanism to stop.
In this embodiment, as shown in the logic block diagram of the control mode one in fig. 13, when in the forward limit monitoring state, the forward limit switch 2 first determines whether the forward limit signal one jumps to a high level, if the forward limit signal one jumps to a high level, then sends the direction switching signal one, and then successfully commutates to enter the reverse limit monitoring state if the forward limit signal one jumps back to a low level. If the forward limit signal is not hopped back to the low level after the forward limit signal is transmitted, the forward limit signal is continuously transmitted, and meanwhile, if the reverse limit signal is hopped to the high level under the condition that the forward limit signal is kept at the high level, the controller immediately starts forward redundancy protection and cuts off the power supply of the driving mechanism. During forward limit monitoring, no matter what state the forward limit signal is, as long as the reverse limit signal is received by the controller, the reverse limit switch is abnormally started to enable the reverse limit signal to be effective, namely, the reverse control mechanism is indicated to be faulty, the controller can immediately perform forward redundancy protection, and the reverse control mechanism is controlled to stop. The logic of the reverse limit monitoring and redundancy protection processing is the same as that of the forward limit monitoring and redundancy protection.
When the reversing wheel 1 is reversed, as shown in fig. 14 to 16, the redundant protection triggering condition and the redundant protection triggering process are the same as those in the forward rotation, and only the position and the direction are changed, and detailed description is omitted.
When the reversing wheel 1 rotates anticlockwise, as shown in fig. 5, the forward limit switch 2 is in a forward limit monitoring state, as shown by the rotation sequence of the limit switch roller 11 on the periphery of the reversing wheel 1 in fig. 5, along with the forward rotation of the reversing wheel 1 shown by a horizontal arrow in the drawing, the rollers 11 of the two limit switches gradually enter different postures from the parallel overlapped state, the first forward switch switching boss 4 and the forward limit switch roller 14 are gradually close to each other and are contacted, the forward limit switch roller 14 can be lifted along with the inclined plane of the first forward switch switching boss 4 to change the height of the inner lever arm 16, jump occurs in the forward limit switch 2, the forward limit switch 2 sends a forward limit signal I, after the roller 11 reaches the vertex along the inclined plane, the direction switching signal I is effective, the driving mechanism controls the reversing wheel 1 to rotate reversely, at the moment, because the dislocation between the first forward switch switching boss 4 and the second reverse limit switch switching boss 5 still exists between the reverse limit switch 3 and the second reverse limit switch switching boss 5, the reverse limit switch 3 is not triggered and cannot trigger the height of the inner lever arm 16, the forward limit switch roller 2 jumps, the forward limit switch 2 changes from the reverse limit switch 1 to the state shown in the reverse limit switch 1 to the reverse limit switch 1, and the reverse limit switch 1 is driven to the state in the reverse limit switch 1, and the state is realized, and the reverse limit switch 1 is reset to the state is realized, and the reverse limit switch 1 is in the state and the state is in the reverse monitored.
Similarly, as shown in fig. 6, when the reversing wheel 1 rotates clockwise, the reversing limit switch 3 enters a limit monitoring state, as shown in the rotation sequence of the limit switch roller 11 on the periphery of the reversing wheel 1 in fig. 6, along with the reversing of the reversing wheel 1 shown by a horizontal arrow in the drawing, the rollers 11 of the two limit switches gradually enter different postures from the parallel overlapped state, the first reversing switch switching boss 7 and the reversing limit switch roller 15 gradually approach and contact, the reversing limit switch roller 15 can lift along with the inclined plane of the first reversing switch switching boss 7 to change the height of the lever arm 16 in the reversing limit switch roller 15, jump occurs in the reversing limit switch 3, the reversing limit switch 3 sends a reversing limit signal I, after the roller 11 reaches the top point along the inclined plane, the direction switching signal II acts, the driving mechanism controls the reversing wheel 1 to rotate forwards, and due to the fact that the gap between the first reversing switch switching boss 7 and the second reversing limit switch switching boss 6 still exists between the forward limit switch 2 and the second reversing switch switching boss 6, the forward limit switch 2 is not triggered and cannot trigger protection, the reversing mechanism drives the reversing wheel 1 to return to the reversing limit switch 1 from the normal state shown in the reversing switch switching boss 6 to the final state, thereby realizing the reverse limit state 1 to the reversing limit monitoring state, and the reversing limit switch 1 is in the reversing limit state is realized, and the reversing limit switch 1 is in the state is reset to the state in the state of the reversing limit state is detected.
As shown in fig. 7, in the forward limit monitoring state, when the forward limit switch 2 fails or the driving mechanism fails, the reversing wheel 1 rotates forward counterclockwise and continues to rotate forward when the forward limit switch roller 14 reaches the highest point of the inclined surface of the first forward switch switching boss 4, and when the reversing wheel 1 rotates forward until the reverse limit switch roller 15 contacts with the second reverse switch switching boss 5, the reverse limit switch 3 sends a reverse limit signal in the forward limit monitoring state, the controller starts forward redundancy safety protection and stops, and at this time, the rollers 11 of the two limit switches coincide on the boss on the periphery of the reversing wheel 1.
As shown in fig. 8, in the reverse limit monitoring state, when the reverse limit switch 3 fails or the driving mechanism fails, the reversing wheel 1 reverses clockwise and continues to rotate reversely when the reverse limit switch roller 15 reaches the highest point of the inclined surface of the first reverse switch switching boss 7, when the reversing wheel 1 reverses until the forward limit switch roller 14 contacts with the second forward switch switching boss 6, the forward limit switch 2 sends a forward limit signal in the reverse limit monitoring state, the controller starts reverse redundancy safety protection and stops, and at this time, the rollers 11 of the two limit switches coincide on the boss on the periphery of the reversing wheel 1.
The driving mechanism for driving the reversing wheel 1 to rotate in this embodiment is a driving motor, and in other embodiments, a cylinder or an oil cylinder is used as the driving mechanism. The double limit switch strategies not only can respectively correspond to the boss inclined planes for triggering reversing, effectively avoid the angle errors existing when the same limit switch triggers reversing, but also can play a role in redundancy protection, further improve the reliability of the limit protection device, make up the defect of limit protection of equipment, and improve the accuracy of motion control of the equipment. The reversing control mechanism in the embodiment has simple structure composition, the boss structure can be designed and installed on the rotating shaft of the driving motor or the linear displacement table, the two-way limit switch is designed into a whole, the fixing is convenient, and the installation and the application are convenient.
the difference from embodiment 1 is that in embodiment 1, the reciprocating member is a rotary member, and the rotary member is a reversing wheel 1. In this embodiment, the reciprocating member is a linear member, and for example, the linear member may be a slider sliding on a linear rail.
The difference from embodiment 1 is that in embodiment 1, the reversing wheel 1 is integrally provided with a boss, two opposite sides of the boss in the direction of the movement of the reciprocating member are sloping surfaces, and the boss protrudes from the reversing wheel 11. In this embodiment, the domatic structure is the recess of setting on the reversing wheel periphery, and the gyro wheel of limit switch of recess can slide with the tank bottom cooperation of recess, and the cell wall of recess is established to domatic, and when limit switch's gyro wheel was walked to the cell wall domatic of recess, limit switch's normally closed end was changed to off-state to send the reversing signal to the controller. In other embodiments, the boss is separately and fixedly connected to the reciprocating member.
the difference from embodiment 1 is that in embodiment 1, both side surfaces of the boss opposite to each other in the direction in which the reciprocating member moves are sloping surfaces, and the sloping surfaces are sloping surfaces. In this embodiment, the slope is an arc surface.
the difference from embodiment 1 is that in embodiment 1, the reciprocating member is a disc-shaped reversing wheel 1. In this embodiment, the reversing wheel has an oval or fan-shaped structure.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The reversing control mechanism comprises a limit switch, a reciprocating part, a driving mechanism for driving the reciprocating part and a controller, wherein the controller is used for receiving a limit signal of the limit switch to control the driving mechanism, and is characterized in that the limit switch comprises a forward limit switch (2) and a reverse limit switch (3); the reciprocating part is provided with a forward movement limit position I and a reverse movement limit position I, when the reciprocating part moves to the forward movement limit position, a forward limit switch (2) correspondingly sends out a forward limit signal, and when the reciprocating part moves to the reverse movement limit position, a reverse limit switch (3) sends out a reverse limit signal;
The controller is provided with a first control mode and a second control mode, wherein the first control mode is used for monitoring the position of a reciprocating motion part moving forward, so that the forward limit switch (2) is in a forward limit monitoring state, and the second control mode is used for monitoring the position of the reciprocating motion part moving backward, so that the reverse limit switch (3) is in a reverse limit monitoring state;
the control method executed by the controller in the mode one comprises the following steps: monitoring and judging a forward limit signal sent by the forward limit switch (2); if the forward limiting signal jumps to be effective, triggering a first direction switching signal, controlling a driving mechanism to drive a reciprocating motion piece to switch from forward motion to reverse motion, and if the forward limiting signal jumps to be effective and then jumps to be ineffective, switching a control mode to a second mode;
the control method executed by the controller in the mode two comprises the following steps: monitoring and judging a reverse limit signal sent by the reverse limit switch (3); and if the reverse limit signal jumps to be effective, triggering a direction switching signal II, controlling the driving mechanism to drive the reciprocating motion piece to switch from reverse motion to forward motion, and if the reverse limit signal jumps to be effective and then jumps to be ineffective, switching the control mode to the mode I.
2. The reversing control mechanism according to claim 1, wherein the reciprocating member further has a forward movement limit position two and a reverse movement limit position two, a distance between the forward movement limit position two and the reverse movement limit position one is smaller than a distance between the forward movement limit position two, when the reciprocating member moves to the forward movement limit position one and the reverse movement limit position two, the forward limit switch (2) correspondingly sends forward limit signals, and when the reciprocating member moves to the reverse movement limit position one and the forward movement limit position two, the reverse limit switch (3) correspondingly sends reverse limit signals; the control method executed by the controller in the mode one further comprises: monitoring and judging a reverse limit signal sent by the reverse limit switch (3); after the first trigger direction switching signal, if the reverse limiting signal is valid, starting forward redundancy safety protection and stopping; under the condition that the first direction switching signal is not triggered, if the reverse limiting signal is effective, starting forward redundancy safety protection and stopping;
the control method executed by the controller in the second mode further comprises the following steps: monitoring and judging a forward limit effective signal sent by a forward limit switch (2); after the second trigger direction switching signal, if the forward limiting signal is valid, starting reverse redundancy safety protection and stopping; and under the condition that the second direction switching signal is not triggered, if the forward limiting signal is effective, starting reverse redundancy safety protection and stopping.
3. The reversing control mechanism of claim 1, wherein the reciprocating member is a linear member.
4. The reversing control mechanism of claim 1, wherein the reciprocating member is a rotary member.
5. A reversing control mechanism according to claim 3, characterized in that the reciprocating member is a reversing wheel (1), the periphery of the reversing wheel (1) being provided with a boss comprising: a first forward switch switching boss (4) and a second forward switch switching boss (6) for switching on-off states of the forward limit switch (2), a first reverse switch switching boss (7) and a second reverse switch switching boss (5) for switching on-off states of the reverse limit switch (3), wherein the first forward switch switching boss (4) and the second forward switch switching boss (6) are arranged on the same circumference and are arranged at intervals in the circumferential direction, and the forward limit switch (2) is arranged between the first forward switch switching boss (4) and the second forward switch switching boss (6); the first reverse switch switching boss (7) and the second reverse switch switching boss (5) are arranged on the same circumference at intervals, and the reverse limit switch (3) is arranged between the first reverse switch switching boss (7) and the second reverse switch switching boss (5); the distance between the first forward switch switching boss (4) and the first reverse switch switching boss (7) is smaller than the distance between the second forward switch switching boss (6) and the second reverse switch switching boss (5), the position of the first forward switch switching boss (4) moving to trigger the forward limit switch (2) forms the forward movement limit position I, the position of the second forward switch switching boss (6) moving to trigger the forward limit switch (2) forms the forward movement limit position II, the position of the first reverse switch switching boss (7) moving to trigger the reverse limit switch (3) forms the reverse movement limit position I, and the position of the second reverse switch switching boss (5) moving to trigger the reverse limit switch (3) forms the reverse movement limit position II.
6. The commutation control mechanism of any one of claims 1-5, wherein the limit switch is a mechanical limit switch.
7. The reversing control mechanism according to claim 6, characterized in that the limit switch comprises a lever arm (16) capable of swinging to switch the state of the limit switch, and the lever arm (16) is provided with a roller (11) for contact with the reciprocating member.
8. The reversing control mechanism according to any one of claims 1 to 5, characterized in that the forward limit switch (2) and the reverse limit switch (3) are juxtaposed in the axial direction of the reversing wheel (1).
9. The reversing control mechanism according to claim 5, characterized in that the boss has a guide slope (8) for guiding the limit switch to switch on-off state in contact with the limit switch in the direction of movement of the reciprocating member, the guide slope (8) being a slope.
10. The commutation control mechanism of any one of claims 1-5, wherein the drive mechanism is a drive motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289175.3A CN114688242B (en) | 2022-03-22 | 2022-03-22 | Reversing control mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289175.3A CN114688242B (en) | 2022-03-22 | 2022-03-22 | Reversing control mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114688242A CN114688242A (en) | 2022-07-01 |
| CN114688242B true CN114688242B (en) | 2023-07-07 |
Family
ID=82138926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210289175.3A Active CN114688242B (en) | 2022-03-22 | 2022-03-22 | Reversing control mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114688242B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010074375A1 (en) * | 2008-12-24 | 2010-07-01 | Kim In-Seok | Forward/reverse rotation control device for drilling machine |
| CN211878445U (en) * | 2020-03-23 | 2020-11-06 | 北京三力创科技发展有限公司 | Control protection circuit of electric film rolling device |
| CN112551300A (en) * | 2020-12-08 | 2021-03-26 | 上海三菱电梯有限公司 | Elevator safety protection system |
-
2022
- 2022-03-22 CN CN202210289175.3A patent/CN114688242B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010074375A1 (en) * | 2008-12-24 | 2010-07-01 | Kim In-Seok | Forward/reverse rotation control device for drilling machine |
| CN211878445U (en) * | 2020-03-23 | 2020-11-06 | 北京三力创科技发展有限公司 | Control protection circuit of electric film rolling device |
| CN112551300A (en) * | 2020-12-08 | 2021-03-26 | 上海三菱电梯有限公司 | Elevator safety protection system |
Non-Patent Citations (1)
| Title |
|---|
| 行程开关中的结构应用;张富正;;中国新技术新产品(第24期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114688242A (en) | 2022-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114688242B (en) | Reversing control mechanism | |
| CN101866762B (en) | Rack-and-pinion type transmission mechanism of automatic changeover switch device | |
| CN106169401B (en) | A kind of novel small-sized electric operating mechanism of circuit-breaker | |
| CN206059319U (en) | A kind of novel small-sized electric operating mechanism of circuit-breaker | |
| CN105513877A (en) | Single-motor three-station actuator and mechanical locking protection device thereof | |
| CN206628429U (en) | A kind of moving contact Kuai He mechanisms and the breaker for possessing moving contact Kuai He mechanisms | |
| US20220367129A1 (en) | Indicating device for a dual-power automatic transfer switch | |
| CN215634127U (en) | Pressure relief valve state detection structure of electric hydraulic pipe fitting machining tool | |
| CN112809735B (en) | Compound joint mechanism that deflects of robot | |
| CN215869103U (en) | Operating mechanism | |
| CN212113604U (en) | Control driving mechanism applied to self-recovery type over-voltage and under-voltage protection circuit breaker | |
| CN101872689B (en) | Worm gear and worm transmission mechanism for automatic change-over switch equipment | |
| CN115206739A (en) | Switching-on and switching-off operating mechanism and circuit breaker | |
| CN201780890U (en) | Pinion-and-rack transmission mechanism for automatic transfer switching equipment | |
| CN220367841U (en) | Switch-on/off position signal control device of isolating switch operation box | |
| CN218996542U (en) | Long-life signal type switch | |
| CN220962235U (en) | Novel water level switch | |
| CN113035618B (en) | Safety switch capable of realizing power-on or power-off by pressing twice and operation method thereof | |
| CN111863473B (en) | Clutch electric mechanism of inflatable cabinet and switching brake operation method | |
| CN201780889U (en) | Worm-and-worm gear transmission mechanism for automatic transfer switching equipment | |
| CN216793547U (en) | Manual isolating switch with electromagnetic lock | |
| CN215116642U (en) | Switch cabinet grounding switch contact in-place detection device | |
| CN211788693U (en) | Reciprocating speed reducer for switching current inside battery box | |
| CN219266557U (en) | Nut detection device | |
| CN219329203U (en) | Position locking device of circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240423 Address after: 471000 in Zhuoyang science and Technology Park, Qinling Road, Jianxi District, Luoyang area, China (Henan) pilot Free Trade Zone, Luoyang City, Henan Province Patentee after: LUOYANG SHIJU INTELLIGENT TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No.263, Kaiyuan Avenue, Luolong District, Luoyang City, Henan Province Patentee before: HENAN University OF SCIENCE AND TECHNOLOGY Country or region before: China |