CN111105959A - Self-locking device of electromagnetic mechanism - Google Patents
Self-locking device of electromagnetic mechanism Download PDFInfo
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- CN111105959A CN111105959A CN201911279309.8A CN201911279309A CN111105959A CN 111105959 A CN111105959 A CN 111105959A CN 201911279309 A CN201911279309 A CN 201911279309A CN 111105959 A CN111105959 A CN 111105959A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/32—Latching movable parts mechanically
- H01H50/321—Latching movable parts mechanically the mechanical latch being controlled directly by the magnetic flux or part of it
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Abstract
The invention relates to a self-locking device of an electromagnetic mechanism, wherein an auxiliary electromagnetic coil, an auxiliary iron core, a lever, a locking sheet, a travel switch and a reverse reset spring are arranged on an electromagnetic mechanism main coil bracket through a mounting seat, when a main circuit is electrified, the auxiliary electromagnetic coil stores energy to a capacitor when being instantaneously attracted, a micro switch is switched on, the main coil is electrified, is switched on and attracted, a limiting body extends upwards along with the main iron core, after the auxiliary electromagnetic coil is instantaneously attracted and released, the self-locking mechanism enters a self-locking working state under the action of the spring force to lock the main iron core at an attraction position, the micro switch is switched off, the main coil is powered off, the self-locking mechanism keeps in the attraction state, a main coil has no electric energy loss, the stored electric energy in the original attraction is released when the power is lost, the auxiliary electromagnetic coil is attracted again, the self-locking mechanism is switched, the suction and release processes are simple and reliable, the operation is convenient, the mechanism runs stably, and the failure is avoided.
Description
Technical Field
The invention relates to a self-locking device of an electromagnetic mechanism.
Background
For power transmission and distribution equipment such as an electric switch, such as an ac contactor, various electromagnetic mechanisms including a coil, an iron core, a reset device, and the like are often used. However, in many occasions, the coil needs to be maintained to supply power to keep the working state after the coil is attracted. When an electromagnetic mechanism such as an alternating current contactor, an electromagnetic control and protection switch and the like is in a pull-in position in the working process, power needs to be continuously supplied to the coil so as to keep the pull-in state. The electromagnetic mechanism has high energy consumption, the coil is easy to burn and lose after being electrified for a long time, the reliability is poor, and the mechanism is easy to lose efficacy when encountering sudden interference conditions; and the auxiliary interlocking function provided by other structures is adopted, most of the auxiliary interlocking functions have complex structures, inconvenient operation and difficult reliability guarantee.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-locking device which can keep self-locking in the suction state of an electromagnetic mechanism, has no energy consumption, is simple and reliable in suction and release processes and convenient to operate and can be used for the electromagnetic mechanism.
The invention relates to a self-locking device of an electromagnetic mechanism, which comprises the electromagnetic mechanism consisting of a main coil and a main iron core, and is characterized in that: the main iron core is connected with a limiting body which follows the main iron core, the limiting body is provided with an upper clamping groove and a lower clamping groove which are distributed up and down, when the main coil is electrified and attracted, the limiting body extends upwards along with the main iron core, and when the main coil is out of power, the limiting body moves back downwards along with the main iron core under the action of an internal reset mechanism (comprising a reset spring and the like); the main coil bracket is fixedly provided with an installation seat, a lever is arranged above the installation seat through a hinged shaft, one end of the lever is connected with an instantaneous driving mechanism capable of instantaneously pressing the lever to swing in the forward direction, and the other end of the lever is connected with a reverse reset spring; the middle part of the lever is connected with a locking piece which can swing along with the lever, the locking piece is positioned on one side of the main iron core, and when in a self-locking position, the locking piece swings reversely and can be clamped into the upper clamping groove or the lower clamping groove to lock the main iron core; the lever can press a travel switch when swinging in the forward direction, and the travel switch is connected in a coil working circuit of the main coil and can control the power-on and power-off states of the main coil;
the instantaneous driving mechanism comprises an auxiliary electromagnetic coil and an auxiliary iron core which is driven by the auxiliary electromagnetic coil to stretch, and the auxiliary iron core is connected with the lever; when the instantaneous current is introduced, the auxiliary iron core which acts instantaneously can complete the action of one-time pressing of the lever to swing in the positive direction;
the reset spring is connected between the rear end of the lever and the mounting seat, and the mounting seat is also provided with a limiting surface capable of limiting the reverse swing stroke of the lever;
the instantaneous driving mechanism and the travel switch are both fixedly arranged on the mounting seat;
the upper part of the auxiliary iron core is provided with a neck part with a smaller diameter, and the lever is in matched insertion connection with the neck part through a U-shaped slot at the end part. When the auxiliary iron core is sucked, the lever is pulled by using the limit of the neck.
The reverse reset spring is a tension spring, and the travel switch is a microswitch.
The main coil is provided with a control circuit, and the control circuit comprises a coil working loop and a control loop; the coil working circuit comprises a main coil and a travel switch K1 which are connected between the input ends of the alternating current power supply; the control loop comprises a rectifying circuit connected with an input end of an alternating current power supply, and a control unit, an auxiliary electromagnetic coil and a charging capacitor are connected between two poles of a direct current output end of the rectifying circuit to form a direct current charging and discharging loop; the control unit can control the charging and discharging of the charging capacitor and the time.
According to the self-locking device of the electromagnetic mechanism, when the main coil is electrified and attracted in an opening state of the self-locking mechanism, the intermediate shaft with the limiting clamping groove extends upwards along with the attraction of the main iron core, when the lower clamping groove reaches the clamping position of the locking sheet, the self-locking machine hook drives the locking sheet to be clamped into the lower clamping groove under the pulling of the reverse reset spring to lock the main iron core at the attraction position, the micro switch is disconnected, the main coil is not required to be continuously powered, no energy consumption is caused when the coil is electrified, the attraction and release processes are simple and reliable, the operation is convenient, and the mechanism is stable in operation and cannot fail.
Drawings
FIG. 1 is a schematic plane view of a self-locking device of an electromagnetic mechanism according to an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a schematic cross-sectional view of a self-locking device of an electromagnetic mechanism according to an embodiment of the present invention in an initial position;
FIG. 6 is a schematic sectional view of the self-locking mechanism of the electromagnetic mechanism according to the embodiment of the present invention when the lever swings forward to disengage from the locking state;
FIG. 7 is a schematic sectional view of the electromagnetic mechanism according to the embodiment of the present invention, after the self-locking device is unlocked, when the main core is extended;
FIG. 8 is a schematic structural view of a cross section of a self-locking device of an electromagnetic mechanism according to an embodiment of the present invention after being locked in an attraction state;
FIG. 9 is a control schematic of an embodiment of the present invention;
fig. 10 is a circuit diagram of an embodiment of the present invention.
Detailed Description
As shown in the figure, the main structure of the self-locking device of the electromagnetic mechanism adopts the conventional electromagnetic mechanism consisting of a main coil 1 and a main iron core 8, the main coil 1 controls the main iron core 8 to extend out, or the main iron core 1 retracts inwards under the action of a reset mechanism consisting of a reset spring in the main coil 1, and the switching-off or switching-on action is executed.
In this embodiment, the main iron core 8 is connected with a limiting body capable of following with the main iron core, the limiting body is provided with an upper clamping groove and a lower clamping groove which are distributed up and down, when the main coil 1 is electrified and attracted, the limiting body extends upwards along with the main iron core 8, and when the main coil 1 is out of power, the limiting body moves back downwards along with the main iron core 8 under the action of an internal reset mechanism (including a reset spring and the like); a mounting seat 5 is fixed above the bracket of the main coil 1, the mounting seat 5 is approximately in a U-shaped structure and is fixedly mounted and connected on the bracket of the main coil 1 through a bottom plate of the U-shaped structure, and a notch is arranged in the middle of the bottom plate of the mounting seat 5 so that a limiting body extends out or retracts upwards along with the main iron core 8; a vertical upward limiting baffle 51 is arranged at one end of the U-shaped structure of the mounting seat 5, a microswitch and an auxiliary electromagnetic coil 2 can be fixedly mounted at the opposite side of the baffle 51, and an auxiliary iron core 3 is arranged in the auxiliary electromagnetic coil 2 to form an instantaneous driving mechanism; a transverse lever 7 is arranged above the mounting seat 5, and the middle part of the lever 7 is hinged to the mounting seat through a hinge shaft; the upper part of the auxiliary iron core 3 is provided with a neck part with a smaller diameter, so that a limiting pressing block 4 is formed above the top part of the auxiliary iron core, a round opening limiting groove is formed at the end part of the lever 7 corresponding to the limiting pressing block 4 to form a U-shaped slot, the lever 7 is matched with a limiting clamp through the U-shaped slot to be clamped at the neck part below the limiting pressing block 4, and the lever 7 is pressed and moved around a hinged shaft to swing forwards through a limiting step on the upper part of the limiting pressing block 4 when the auxiliary electromagnetic coil 2; the other end of the lever 7 is connected with a reverse return spring 10 formed by a tension spring, the reverse return spring is stressed and stretched when the lever 7 swings in the forward direction, and the lever 7 can be pulled to reset in the reverse direction through the elastic restoring force of the reverse return spring 10 when the lever 7 is released.
An upper ring-shaped clamping groove and a lower ring-shaped clamping groove are arranged on the outer circumferential surface of the limiting body, and the diameter of the part of the limiting body, which is positioned between the upper ring-shaped clamping groove and the lower ring-shaped clamping groove, is larger than the bottom diameter of the upper ring-shaped clamping groove and the lower ring-shaped clamping groove; a locking sheet 71 which can swing along with the lever is connected to the middle part of the lever 7, the locking sheet 71 is positioned on one side of the main iron core 8, and the hook part of the locking sheet 71 faces the main iron core and can be clamped into an upper clamping groove or a lower clamping groove for locking; in the other side space of the intermediate shaft 8 relative to the locking sheet 71, a travel switch 6 composed of a microswitch is arranged at the position below the lever, the travel switch 6 is connected in a power supply circuit of the main coil, the travel switch 6 is pressed to control the main coil to be electrified when the lever 7 swings in the forward direction, and the main coil is powered off when the lever swings in the reverse direction.
Further, the mounting seat 5 is selectively arranged to be a U-shaped structure, the upper end of the reverse return spring 10 is fixed at the end of the lever 7 in a limiting manner, the lower end of the reverse return spring is fixed at one side wall of the U-shaped structure of the mounting seat 5 in a limiting manner, and a part of the other side wall of the U-shaped structure of the mounting seat 5, which corresponds to the reverse return spring 10, forms a limiting structure 51 for reverse return of the lever 7.
Still further, a vertical upward baffle 52 is arranged at one end, close to the auxiliary electromagnetic coil, of the U-shaped structure of the mounting seat 5, the auxiliary electromagnetic coil 2 of the instantaneous driving mechanism is fixedly connected to the outer side of the baffle 52, and the travel switch 6 is fixedly mounted on a mounting seat bottom plate on the inner side of the baffle 52, so that the structure is compact, and the occupied space is small.
According to the control principle of the embodiment of the invention, as shown in fig. 5, the mechanism is in the initial position before the operation, the auxiliary electromagnetic coil 2 is in the release state, and the locking piece 71 is clamped in the lower clamping groove on the outer circumferential surface of the limiting body;
when the control circuit is powered on, after current is rectified, the current is controlled by the control circuit to flow through the auxiliary electromagnetic coil to charge the energy storage capacitor, the auxiliary electromagnetic coil 2 is attracted and pulled, so that the lever 7 swings in the positive direction to drive the locking piece 71 to be separated from the locking position, and the limiting body is unlocked along with the main iron core 8, as shown in fig. 6;
meanwhile, the travel switch K1 is pressed, the main coil 1 is electrified and sucked, the main iron core 8 extends upwards under the action of the main coil 1, the instantaneous driving mechanism releases, in the process that the main iron core 8 extends outwards, the locking sheet 71 corresponds to the outer side of the convex part between the upper and lower clamping grooves, the main iron core 8 cannot be prevented from extending upwards continuously, the microswitch is in a pressed state before the locking sheet enters the upper and lower clamping grooves, and the main coil is continuously switched on, as shown in fig. 7;
when the main iron core 8 continues to rise and the lower clamping groove reaches the position of the locking sheet, because the instantaneous driving mechanism is released at the moment, under the action of the elastic restoring force of the reverse restoring spring 10, the lever 7 is reversely restored, the locking sheet 71 is clamped into the lower clamping groove, and meanwhile, the travel switch K1 is released, the main coil 1 is powered off, the main iron core 8 is locked at the attraction position where the main iron core completely extends out, and cannot rise or fall, as shown in fig. 8
When the main control circuit is powered off, the electric energy in the original energy storage capacitor is released reversely by the control circuit through the auxiliary coil, the auxiliary electromagnetic coil 2 attracts again, the pressing lever 7 swings in the forward direction to drive the locking piece 71 to be separated from the lower clamping groove, the locking position is released, the main iron core 8 resets inwards and retracts under the action of the reset mechanism in the main coil 1 until the main iron core returns to the initial position shown in fig. 5, and the locking piece 71 is clamped into the upper clamping groove again;
fig. 9 shows a control principle of an embodiment of the present invention, in which:
the main coil is provided with a control circuit, and the control circuit comprises a coil working loop and a control loop; the coil working circuit comprises a main coil L2 and a travel switch K1 which are connected between the input ends of the alternating current power supply; the control loop comprises a rectifying circuit connected with the input end of the alternating current power supply, and a direct current charging and discharging loop consisting of a control unit, an auxiliary electromagnetic coil L1 and a charging capacitor C7 is connected between two poles of the direct current output end of the rectifying circuit; controlling the charging and discharging state and time of the charging capacitor C7 through the control unit;
when the mechanism is in a state shown in fig. 5, the travel switch K1 is powered off, the main coil L2 does not work, when the main coil L2 needs to work, a direct current charging and discharging loop is started through the control unit, direct current charges the charging capacitor C7 through the auxiliary electromagnetic coil L1, the instantaneous driving mechanism is attracted to enable the lever 7 to act due to the fact that current flows in the auxiliary electromagnetic coil L1, after the charging capacitor C7 is fully charged, no current flows in the auxiliary electromagnetic coil L1, the auxiliary iron core 3 is automatically released, one instantaneous driving action is completed, at the moment, the main coil L2 is powered on to work due to the fact that the travel switch K1 is switched on, and the subsequent self-locking holding action is completed;
when the power is lost or the main iron core 8 needs to be released, the control unit controls the charging capacitor C7 to discharge, and the auxiliary electromagnetic coil L1 has discharging current passing through, so that the lever 7 acts again to unlock, and the release action of the main iron core 8 is completed.
Fig. 10 is a specific circuit configuration of an embodiment of the present invention, in which:
1. when the circuit is powered on, 220V alternating current is rectified and then passes through D5, Q1 and D6, flows through L1 to charge and store energy on an electrolytic capacitor C7, L1 is attracted in the charging process, C7 is automatically released after the instantaneous charging and storing of energy is completed, L1 is pulled, L1 pulls an automatic lock mechanism to press down a microswitch K1 in the attraction process to enable L2 to be powered on to generate upward attraction action, the self-locking mechanism is pulled into a second locking position by a spring when the attraction of L2 reaches the second locking position, the microswitch is turned off, an L2 electromagnetic main coil is powered off, an electromagnetic main iron core is locked in the attraction working state by the self-locking mechanism, and the whole mechanism and the circuit are in the attraction working state of no current.
2. When the circuit is in power failure, the Q2 is inverted to be in a conducting state from a turn-off state, the stored electric energy of the C7 forms a loop through the L1, the R3, the D8 and the Q2, the electric energy flows through the L1 to generate attraction action, the self-locking mechanism is pulled, the K1 is conducted under the pressure, but the upper end is powered off, the L2 does not have attraction electric energy, and the electromagnetic main iron core generates downward movement under the action of the downward spring force of the reset mechanism to enable the self-locking mechanism to enter a first locking position.
Claims (7)
1. The utility model provides a self-lock device of electromagnetic mechanism, is including the electromagnetic mechanism who constitutes by main coil and main iron core, its characterized in that: the main iron core is connected with a limiting body which follows the main iron core, the limiting body is provided with an upper clamping groove and a lower clamping groove which are distributed up and down, when the main coil is electrified and attracted, the limiting body extends upwards along with the main iron core, and when the main coil is out of power, the limiting body moves back downwards along with the main iron core under the action of an internal reset mechanism (comprising a reset spring and the like); the main coil bracket is fixedly provided with an installation seat, a lever is arranged above the installation seat through a hinged shaft, one end of the lever is connected with an instantaneous driving mechanism capable of instantaneously pressing the lever to swing in the forward direction, and the other end of the lever is connected with a reverse reset spring; the middle part of the lever is connected with a locking piece which can swing along with the lever, the locking piece is positioned on one side of the main iron core, and when in a self-locking position, the locking piece swings reversely and can be clamped into the upper clamping groove or the lower clamping groove to lock the main iron core; the lever can press a travel switch when swinging in the positive direction, and the travel switch is connected in a coil working circuit of the main coil and can control the power-on and power-off states of the main coil.
2. The self-locking device of an electromagnetic mechanism according to claim 1, characterized in that: the instantaneous driving mechanism comprises an auxiliary electromagnetic coil and an auxiliary iron core which is driven by the auxiliary electromagnetic coil to stretch, and the auxiliary iron core is connected with the lever; when the instantaneous current is introduced, the auxiliary iron core which acts instantaneously can complete the action of one-time pressing of the lever to swing in the positive direction.
3. The self-locking device of an electromagnetic mechanism according to claim 1 or 2, characterized in that: the reset spring is connected between the rear end of the lever and the mounting seat, and the mounting seat is further provided with a limiting surface capable of limiting the reverse swing stroke of the lever.
4. A self-locking device of an electromagnetic mechanism according to claim 3, characterized in that: the instantaneous driving mechanism and the travel switch are both fixedly installed on the installation seat.
5. The self-locking device of an electromagnetic mechanism according to claim 4, characterized in that: the upper part of the auxiliary iron core is provided with a neck part with a smaller diameter, and the lever is in matched insertion connection with the neck part through a U-shaped slot at the end part.
6. The self-locking device of an electromagnetic mechanism according to any one of claims 1 to 5, wherein: the reverse reset spring is a tension spring, and the travel switch is a microswitch.
7. The self-locking device of an electromagnetic mechanism according to claim 6, characterized in that: the main coil is provided with a control circuit, and the control circuit comprises a coil working loop and a control loop; the coil working circuit comprises a main coil and a travel switch K1 which are connected between the input ends of the alternating current power supply; the control loop comprises a rectifying circuit connected with an input end of an alternating current power supply, and a control unit, an auxiliary electromagnetic coil and a charging capacitor are connected between two poles of a direct current output end of the rectifying circuit to form a direct current charging and discharging loop; the control unit can control the charging and discharging of the charging capacitor and the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911279309.8A CN111105959A (en) | 2019-12-13 | 2019-12-13 | Self-locking device of electromagnetic mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911279309.8A CN111105959A (en) | 2019-12-13 | 2019-12-13 | Self-locking device of electromagnetic mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111105959A true CN111105959A (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911279309.8A Pending CN111105959A (en) | 2019-12-13 | 2019-12-13 | Self-locking device of electromagnetic mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111105959A (en) |
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2019
- 2019-12-13 CN CN201911279309.8A patent/CN111105959A/en active Pending
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200515 Address after: New science and Technology Park, 212200 Yangzhong Road, Jiangsu south city of Zhenjiang Province, No. 1 Applicant after: WETOWN ELECTRIC GROUP Co.,Ltd. Address before: 212000 5 union Avenue, Science Park, Yangzhong, Zhenjiang, Jiangsu Applicant before: Ji Hongshun Applicant before: Ji Jiahui |
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