CN212250919U - Electromagnet for electromagnetic brake - Google Patents

Abstract

The utility model relates to an electromagnetic braking field specifically is a be used for electromagnetic brake electro-magnet, including dabber and control circuit, the one end of dabber is provided with the threaded spindle, one side of dabber is provided with presses the cover, one side threaded connection who presses the cover has the screw thread, one side of dabber is provided with armature, press the cover to pass through the screw thread and install one side at armature, one side of armature is provided with the yoke, the inside of yoke is provided with the coil, be provided with insulating varnish between yoke and the coil, the outside of dabber is provided with the dish spring, the outside of dish spring is provided with the protective housing, one side of dish spring is provided with pressure sensor, the other end of dabber is provided with the loop bar, the outer wall threaded connection of loop bar has lock nut, the dish spring includes that. The beneficial effects of the utility model reduce the power of transformer, reduce the volume and the weight of control box, overcurrent relay switches the big voltage circuit into little voltage circuit and keeps to reduce the electromagnetism iron coil temperature rise.

Description

Electromagnet for electromagnetic brake

Technical Field

The utility model relates to an electromagnetic braking field specifically is one kind and is used for electromagnetic brake electro-magnet.

Background

The electromagnetic brake has the advantages of simple structure, high response speed, convenience in maintenance, low cost and the like, and can replace a hydraulic brake under some working condition environments. At present, the brake force of the brake is maintained mainly by regularly checking the abrasion condition of a friction plate, so that the actual brake force condition of the brake cannot be known, and the hook slipping is easily caused due to untimely maintenance.

When the electromagnetic brake works, the electromagnetic brake generally works in a large-voltage pull-in and small-voltage maintaining mode. When the voltage is high, the power is high, and the coil is easy to heat. At present, in order to reduce the heating of the electromagnet coil, the heating of the electromagnet coil is mainly controlled by controlling the large-voltage pull-in time through a time relay. However, the temperature rise of the coil is still high under high working frequency by adopting the control mode.

Chinese patent No. CN201811602472.9 provides an electromagnetic brake control apparatus and method, the apparatus includes: the control system comprises a control core unit, a clock unit, a photoelectric conversion input unit, a photoelectric conversion output unit and an electromagnetic brake control interface unit; the control core unit is used for receiving a brake input signal, a clock signal and sending a brake output signal; the photoelectric conversion input unit is used for sending a braking input signal to the control core unit; the photoelectric conversion output unit is used for sending a braking output signal to the electromagnetic brake control interface unit; the electromagnetic brake control interface unit is used for driving the electromagnetic brake to suck; the system adopts a control mode of high-pressure suction and low-pressure maintenance, the high-pressure suction ensures that the suction of the electromagnetic brake has larger locking torque instantly, the low-pressure maintenance can effectively reduce the heating aging of the electromagnetic brake caused by long-time high-pressure suction, and the service life of the electromagnetic brake is greatly prolonged.

The existing power part for opening the brake of the electromagnetic brake has the defects that the brake is easy to generate heat in a high-frequency working state due to high power, a coil is easy to burn, and when the electromagnetic brake works, and an armature collides with a yoke during attraction, the noise is high, so that the development of an electromagnet for the electromagnetic brake is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for electromagnetic brake electro-magnet to solve the electro-magnet brake power pack that opens the floodgate that proposes among the above-mentioned background art, because of power is big, the stopper generates heat easily under the operating condition of high frequency, and the coil burns out easily, and electromagnetic brake during operation, because of the actuation, when armature collided with the yoke, the problem that the noise is bigger.

The technical scheme of the utility model is that: the utility model provides a be used for electromagnetic brake electro-magnet, includes dabber and control circuit, the one end of dabber is provided with the threaded spindle, one side of dabber is provided with presses the cover, one side threaded connection who presses the cover has the screw thread, one side of dabber is provided with armature, press the cover to install in one side of armature through the screw thread, one side of armature is provided with the yoke, the inside of yoke is provided with the coil, be provided with insulating varnish between yoke and the coil, the outside of dabber is provided with the dish spring, the outside of dish spring is provided with the protective housing, one side of dish spring is provided with pressure sensor, the other end of dabber is provided with the loop bar, the outer wall threaded connection of loop bar has lock nut.

Further, the dish spring includes dish spring lever arm and dish spring opening side, the both ends of dish spring are not in same horizontal plane with dish spring body, and the both ends of dish spring are close to dish spring opening side downwards.

Furthermore, one side of the armature close to the yoke iron is provided with an annular groove, and one side part of the armature is close to the yoke iron.

Further, the control circuit comprises an overcurrent relay, a time relay + contactor, a transformer, a rectifying module and a power supply AC.

Further, two input ports of the over-current relay are connected with a power supply AC through a conductive wire, and the time relay + contactor is connected with one end of the transformer through a conductive wire.

Further, the rectifier modules are located at two ends of the transformer and the coil, and different terminals of the rectifier modules are connected with the transformer and the coil through conducting wires.

Furthermore, the control circuit is divided into a large voltage circuit and a small voltage circuit, the large voltage circuit is an electromagnet attracting circuit, and the small voltage circuit is an electromagnet holding circuit.

Furthermore, the two disc springs at the left and right ends of the disc spring assembly are opened outwards, namely the disc spring lever arm backrest side faces one side of the disc spring assembly.

Furthermore, the yoke and the coil are treated by an integral paint dipping process to solidify the coil so as to improve the insulation grade, the heat conduction performance and the anti-seismic performance of the coil.

Further, there are three combinations of the disc springs, and the combinations of the disc springs are respectively: superposition combination, involution combination and composite combination.

The utility model discloses an improve and provide one kind here and be used for the electromagnetic braking ware electro-magnet, compare with prior art, have following improvement and advantage:

(1) the utility model discloses a directly provide big voltage for the electro-magnet after carrying out the rectification to input alternating voltage, open the floodgate to the stopper, provide little voltage for the electro-magnet through transformer step-down back rectification behind the switching-off, let the stopper keep the switching-off state, reduce the power of transformer through this kind of mode, reduce the volume and the weight of control box.

(2) The temperature rise of the electromagnet coil is controlled by limiting the current to control the large-voltage attraction time, namely when the current in the circuit is increased to the electromagnet to be attracted, the large-voltage circuit is switched to a small-voltage circuit through an overcurrent relay to be kept, so that the temperature rise of the electromagnet coil is reduced.

(3) The utility model discloses a pressure sensor real-time supervision electric magnet in dish spring's the pressure condition to but the brake force of control stopper. When the friction plate on the brake is abraded or the structural part is abnormal, the elastic force of the disc spring is reduced. When the value is reduced to the set value, the sensor gives an alarm.

(4) Two dish springs at both ends all are that the opening is outside about adopting the dish spring combination, and dish spring lever arm back orientation is towards one side of dish spring group promptly, and the purpose makes the dish spring combination remain the trend of outwards springing open all the time, corresponds the band-type brake trend of stopper assembly promptly, is convenient for provide the sensitivity of electro-magnet action, moreover, can also reduce the friction of dish spring and both sides elasticity effect face.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a diagram of the structure of an electromagnet of the present invention;

fig. 2 is a schematic structural view of the disc spring of the present invention;

FIG. 3 is a schematic view of the structure of the annular groove of the present invention;

fig. 4 is a schematic diagram of the control mode of the present invention;

fig. 5 is a flow chart diagram of the present invention.

Description of reference numerals:

1 mandrel, 2 threaded shafts, 3 armatures, 4 yokes, 5 coils, 6 insulating varnish, 7 disc springs, 8 protective cases, 9 pressure sensors, 10 loop bars, 11 locking nuts, 12 pressing sleeves, 13 threaded wires, 14 back sides, 15 opening sides, 16 overcurrent relays, 17 time relays + contactors, 18 transformers, 19 rectifier modules, 20 power supplies AC and 21 annular grooves.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a be used for electromagnetic brake electro-magnet through the improvement here, as shown in figures 1-5, including dabber 1 and control circuit, the one end of dabber 1 is provided with threaded shaft 2, one side of dabber 1 is provided with presses cover 12, one side threaded connection of pressing cover 12 has screw thread 13, one side of dabber 1 is provided with armature 3, press cover 12 is installed in one side of armature 3 through screw thread 13, one side of armature 3 is provided with yoke 4, the inside of yoke 4 is provided with coil 5, be provided with insulating varnish 6 between yoke 4 and coil 5, yoke 4 solidifies coil 5 with coil 5 whole dip coating technology processing, in order to improve the insulation level, thermal conductivity and anti-seismic performance of coil 5, the outside of dabber 1 is provided with dish spring 7, the outside of dish spring 7 is provided with protective housing 8, one side of dish spring 7 is provided with pressure sensor 9, adopt pressure sensor 9 real-time supervision dish spring 7's pressure condition in the electromagnet, therefore, the braking force of the brake can be monitored, and when the friction plate on the brake is abraded or a structural part is abnormal, the elastic force of the disc spring 7 is reduced. When the set value is reduced, the sensor gives an alarm, a loop bar 10 is arranged at the other end of the mandrel 1, and a locking nut 11 is connected to the outer wall of the loop bar 10 in a threaded mode.

Further, dish spring 7 includes dish spring lever arm back side 14 and dish spring opening side 15, and the both ends of dish spring 7 are not at same horizontal plane with the dish spring body, and the both ends of dish spring 7 are close to dish spring opening side 15 downwards.

Furthermore, one side of the armature 3 close to the yoke 4 is provided with an annular groove 22, the annular groove 22 can reduce the contact area when the armature 3 collides with the yoke 4 so as to reduce the collision noise when the electromagnet is attracted, and one side part of the armature 3 is close to the yoke 4.

Further, the control circuit comprises an overcurrent relay 16, a time relay + contactor 17, a transformer 18, a rectifier module 19 and a power supply AC20, and the electromagnet attraction circuit can be switched to an electromagnet holding circuit through the time relay + contactor 17 to protect the coil 5 and prevent the coil 5 from overheating.

Further, two input ports of the overcurrent relay 16 are connected with a power supply AC20 through a conductive wire, the time relay + contactor 17 is connected with one end of the transformer 18 through a conductive wire, alternating current enters the coil 5 load through rectification after passing through the overcurrent relay 16, when the current increases to a set value, the overcurrent relay 16 switches the electromagnet attracting circuit to an electromagnet holding circuit, and when the overcurrent relay 16 fails or the time is too long, the electromagnet attracting circuit can be switched to the electromagnet holding circuit through the time relay + contactor 17 to protect the coil 5 and prevent the coil 5 from overheating.

Further, a rectifying module 19 is located at both ends of the transformer 18 and the coil 5, and different terminals of the rectifying module 19 are connected to the transformer 18 and the coil 5 by leading to conductive lines.

Further, the control circuit is divided into a large voltage circuit and a small voltage circuit, the large voltage circuit is an electromagnet attracting circuit, the small voltage circuit is an electromagnet maintaining circuit, the large voltage circuit is directly used for rectifying the input alternating voltage and then providing the electromagnet with the large voltage circuit, the brake is switched off, the voltage is reduced through the transformer 18 after the brake is switched off and then rectifying the voltage and providing the small voltage circuit for the electromagnet, and the brake is enabled to maintain the switching-off state.

Furthermore, after the disc springs 7 are combined, the two disc springs 7 at the left end and the right end are both opened outwards, namely the direction of the back side 14 of the disc spring lever arm faces to one side of the disc spring combination, so that the disc spring 7 combination always keeps the tendency of outwards bouncing, and the action sensitivity of the electromagnet is convenient to provide.

Further, the yoke 4 and the coil 5 are treated by an integral paint dipping process to solidify the coil 5, so that the insulation grade, the heat conduction performance and the anti-seismic performance of the coil 5 are improved.

Further, there are three combinations of the disc springs 7, and the combinations of the disc springs 7 are: the folding combination, the involution combination and the composite combination are preferably involution combination, but no matter which combination is adopted, the two disc springs 7 at the left and right ends of the combined disc springs 7 are opened outwards, namely the lever arm backrest direction of the disc springs 7 faces to one side of the disc spring 7 group (see figure 2), so that the disc spring 7 combination always keeps the trend of outwards bouncing.

The working principle is as follows: the control circuit (see fig. 4) of the utility model is divided into a large voltage circuit and a small voltage circuit; the large voltage circuit is an electromagnet attracting circuit, and the small voltage circuit is an electromagnet maintaining circuit; the alternating current enters a coil 5 load through rectification after passing through the overcurrent relay 16, and when the current is increased to a set value, the overcurrent relay 16 switches the electromagnet attraction circuit into an electromagnet holding circuit; when the overcurrent relay 16 is out of work or the time is too long, the electromagnet attraction circuit can be switched to the electromagnet holding circuit through the time relay and the contactor 17, the coil 5 is protected, and the coil 5 is prevented from being overheated.

Mode of operation (action): the screw shaft is through screw shaft pressure cover 12 (including connecting bolt group) with armature 3 and dabber 1 link together and become a subassembly, dish spring 7 group cover is on dabber 1, can follow dabber 1 axial slip under the effect of electro-magnet circular telegram back suction and dish spring 7 tension, pressure sensor 9 is installed on dish spring 7 right side, gapped regulation lock nut 11 in the sensor outside, coil 5 is installed inside yoke 4, yoke 4 passes through the guide pin bushing of hole both sides, the suit is on dabber 1, yoke 4 outside is through welding or bolt or other modes, be fixed in on the cantilever crane of electromagnetic braking ware assembly, after circular telegram for electro-magnet (coil 5), the electro-magnet produces the suction, attract armature 3 to the electro-magnet direction action, namely: the brake device comprises a brake device, a brake disc spring 7, an armature 3, a rocker arm, a brake lever, a brake switch and a brake switch, wherein the brake switch is connected with the brake switch through the brake switch, the brake switch is connected with. When the electromagnet is stopped to be electrified, the electromagnetic attraction force disappears (the residual magnetic force is small and is ignored), the disc spring 7 pushes the armature 3 to be far away from the yoke 4 under the tension force, namely, the armature 3 drives the rocker to be opened, and the brake acts correspondingly, so that the normally closed requirement of the crane relevant specifications on the brake is realized, namely, the brake is closed without being electrified.

The utility model discloses a pressure condition of dish spring 7 among the pressure sensor 9 real-time supervision electromagnet to can monitor the brake force of stopper, when friction disc wearing and tearing or structure appear unusually on the stopper, dish spring 7 elasticity can reduce. When the value is reduced to the set value, the sensor gives an alarm. The utility model discloses a yoke 4 is handled with 5 whole dip coating processes of coil and is solidified coil 5 to improve insulating grade, heat conductivility and the anti-seismic performance of coil 5. The utility model discloses a directly provide big voltage circuit for the electro-magnet after carrying out the rectification to input alternating voltage, open the floodgate to the stopper, provide little voltage circuit for the electro-magnet through 18 steps down after the rectification of transformer behind the switching-off, let the stopper keep the switching-off state. In this way, the power of the transformer 18 is reduced, and the volume and weight of the control box are reduced. The utility model discloses an adopt time relay + contactor 17 control large voltage actuation time, prevent to lose efficacy because of overcurrent relay 16, supply the heavy current for a long time to lead to coil 5 overheated burnout. The utility model discloses a contact area when control armature 3 collides with yoke 4 reduces the time collision noise that the electro-magnet was inhaled. The disc spring 7 has three combination modes, which are respectively as follows: the disc spring 7 combination is always kept in a tendency of outwards bouncing (corresponding to the contracting brake tendency of the brake assembly), so that the sensitivity of the electromagnet action is convenient to provide, and the friction between the disc spring 7 and the elastic action surfaces on two sides can be reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An electromagnet for an electromagnetic brake, comprising: comprises a mandrel (1) and a control circuit, wherein a threaded shaft (2) is arranged at one end of the mandrel (1), a pressing sleeve (12) is arranged at one side of the mandrel (1), a threaded wire (13) is connected to one side of the pressing sleeve (12) in a threaded manner, an armature (3) is arranged at one side of the mandrel (1), the pressing sleeve (12) is arranged at one side of the armature (3) through the threaded wire (13), a yoke (4) is arranged at one side of the armature (3), a coil (5) is arranged inside the yoke (4), insulating paint (6) is arranged between the yoke (4) and the coil (5), a disc spring (7) is arranged outside the mandrel (1), a protective shell (8) is arranged outside the disc spring (7), a pressure sensor (9) is arranged at one side of the disc spring (7), a sleeve rod (10) is arranged at the other end of the mandrel (1), the outer wall of the loop bar (10) is in threaded connection with a locking nut (11).

2. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: dish spring (7) are including dish spring lever arm back side (14) and dish spring opening side (15), the both ends and the dish spring body of dish spring (7) are not at same horizontal plane, and the both ends of dish spring (7) are close to dish spring opening side (15) downwards.

3. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: an annular groove (22) is formed in one side, close to the yoke iron (4), of the armature iron (3), and one side portion of the armature iron (3) is close to the yoke iron (4).

4. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: the control circuit comprises an overcurrent relay (16), a time relay + contactor (17), a transformer (18), a rectifying module (19) and a power supply AC (20).

5. An electromagnet for an electromagnetic brake as defined in claim 4, wherein: two input ports of the overcurrent relay (16) are connected with a power supply AC (20) through conducting wires, and the time relay + contactor (17) is connected with one end of a transformer (18) through conducting wires.

6. An electromagnet for an electromagnetic brake as defined in claim 4, wherein: the rectifying modules (19) are positioned at two ends of the transformer (18) and the coil (5), and different terminals of the rectifying modules (19) are connected with the transformer (18) and the coil (5) through conducting wires.

7. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: the control circuit is divided into a large voltage circuit and a small voltage circuit, the large voltage circuit is an electromagnet attracting circuit, and the small voltage circuit is an electromagnet maintaining circuit.

8. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: two disc springs (7) at the left and right ends of the disc spring (7) after combination are opened outwards, namely the direction of the back side (14) of the disc spring lever arm faces one side of the disc spring combination.

9. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: the yoke iron (4) and the coil (5) are treated by adopting an integral paint dipping process to solidify the coil (5) so as to improve the insulation grade, the heat conduction performance and the anti-seismic performance of the coil (5).

10. An electromagnet for an electromagnetic brake as defined in claim 1, wherein: the combination mode of dish spring (7) has three kinds of modes, and the combination mode of dish spring (7) is respectively: superposition combination, involution combination and composite combination.

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