CN215299079U - Clapper type electromagnetic mechanism - Google Patents

Abstract

The utility model provides a clapper type electromagnetic mechanism, which comprises a magnetic suction part with an iron core; a split-shut portion having an armature; the iron core is provided with a contact end which is in contact with the armature, the contact end comprises at least one first end face, and when the armature is located at a pull-in position, the armature is attached to the first end face. The utility model discloses an electromagnetic mechanism has obtained faster combined floodgate speed through increasing combined floodgate electromagnetic force, and has reduced the adverse effect of remanence and accelerated the separating brake speed at the separating brake in-process.

Description

Clapper type electromagnetic mechanism

Technical Field

The utility model relates to an electromagnetic mechanism field, concretely relates to clap box-like electromagnetic mechanism.

Background

The electromagnetic mechanism mainly functions to convert electric energy into mechanical energy through an electromagnetic induction principle, drive the contact to act and complete the connection or disconnection of a loop. The electromagnetic mechanism can be divided into a direct-acting type and a clapper type.

Fig. 1 shows a schematic diagram of a clapper electromagnetic mechanism of the prior art, which comprises a core 12 ', a coil 13 ' (only shown in the wire winding direction) wound on the core, and an armature 15 '. The iron core 12 'includes a cylindrical iron core body 120' and a contact end 121 'located at an end of the iron core body and integrated with the iron core body 120'. When the coil 13 'is energized, the induced magnetic field in the iron core 12' generates an electromagnetic force, the armature 15 'is attracted and rotated against the spring force of the spring mechanism (not shown in fig. 1), and finally the armature 15' is in contact with the end face 123 'of the contact end 121', so that the attraction of the electromagnetic mechanism is realized. When the coil 13 ' is de-energized, the induced magnetic field in the iron core 12 ' disappears, and the spring mechanism drives the armature 15 ' to rotate in a direction away from the contact end 121 ' of the iron core 12 ', so that the armature 15 ' is separated from the iron core 12 ', and the releasing process is completed.

When the armature 15 ' of the electromagnetic mechanism is in the attraction position shown in fig. 1, an included angle is formed between the armature 15 ' and the end face 123 ' of the contact end 121 ', and the armature 15 ' is in line contact with the contact end 121 ', so that an air gap exists between most of the area of the end face 123 ' of the contact end 121 ' and the armature 15 '. Since the magnetic attraction force of the iron core 12 'to the armature 15' is inversely proportional to the square of the air gap distance during attraction, a larger air gap between the contact end 121 'and the armature 15' causes a smaller electromagnetic force between the armature 15 'and the iron core 12', which affects the attraction performance of the electromagnetic mechanism.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that prior art exists, the utility model provides a clap box-like electromagnetic mechanism, it includes: a magnetic part including an iron core; a split-combination portion including an armature; the iron core is provided with a contact end which is in contact with the armature, the contact end comprises at least one first end face, and when the armature is located at a pull-in position, the armature is attached to the first end face.

Preferably, the contact end includes a second end face, and when the armature is attached to the first end face, an air gap is formed between the armature and the second end face.

Preferably, the second end face is perpendicular to a longitudinal axis of the core.

Preferably, the second end face is not perpendicular to the longitudinal axis of the iron core.

Preferably, the included angle between the first end face and the second end face is not less than 165 degrees and less than 180 degrees.

Preferably, the included angle between the first end face and the second end face is not less than 177 degrees and not more than 178 degrees.

Preferably, the area ratio of the first end face to the second end face is not less than 0.1 and not more than 10.

Preferably, the area ratio of the first end face to the second end face is not less than 0.8 and not more than 1.25.

Preferably, the electromagnetic mechanism further includes a power supply electrically connected to two terminals of a coil surrounding the iron core, the power supply is controlled to supply a first current to the coil during the attracting process of the clapper type electromagnetic mechanism, and supply a second current to the coil during the holding process of the clapper type electromagnetic mechanism, wherein the second current is smaller than the first current.

Preferably, the electromagnetic mechanism further comprises an air gap pad disposed on the second end face.

Preferably, the iron core comprises an iron core body fixedly connected with the contact end, the iron core body is columnar, and the cross sectional area of the contact end on a plane perpendicular to the longitudinal axis of the iron core is larger than that of the iron core body on the plane perpendicular to the longitudinal axis.

Preferably, clapper formula electromagnetic mechanism still includes the skeleton, the skeleton has injectd and has been used for holding the accommodation space of iron core body, the coil winding is in on the lateral surface of skeleton.

Preferably, the skeleton comprises: the framework body is in a cylindrical or tubular shape with two open ends; the base part and the top end part are fixed at two opposite ends of the framework body and are in circular ring plate shapes, and the annular accommodating space is limited by the outer side wall of the framework body.

The utility model discloses an electromagnetic mechanism has great actuation electromagnetic force to armature at the actuation in-process, can shorten the time of actuation, has reduced the residual magnetism of iron core to the adverse effect of release armature simultaneously at the release in-process, has consequently shortened release action time.

In addition, the coil in the electromagnetic mechanism is provided with different currents in the attracting process and the maintaining process, so that the electromagnetic mechanism has a more compact structure and lower heat dissipation, and the use cost is reduced.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic diagram of a clapper electromagnetic mechanism of the prior art;

fig. 2 shows a schematic view of an electromagnetic mechanism according to a first embodiment of the invention;

FIG. 3 is a perspective view of the electromagnetic mechanism of FIG. 2 with the armature and core assembled;

FIG. 4 illustrates a perspective view of a backbone of the electromagnetic mechanism shown in FIG. 3;

FIG. 5 illustrates a perspective view of the core of the electromagnetic mechanism shown in FIG. 3;

fig. 6 shows a side view of the core shown in fig. 5, viewed along an intersection line parallel to the second end face and the first end face;

fig. 7 is a schematic diagram showing the contact end of the iron core and the armature in contact when the electromagnetic mechanism shown in fig. 1 and 2 is in an attraction state;

figure 8 shows an electromagnetic mechanism according to a second embodiment of the invention;

fig. 9 shows a schematic view of an armature and a core in an electromagnetic mechanism according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.

Fig. 2 shows a schematic view of an electromagnetic mechanism according to a first embodiment of the present invention, wherein the electromagnetic mechanism 10 comprises: a magnetic attraction part including a core 12 and a coil part 13, wherein the coil part 13 includes a coil surrounding the core 12; the separation and combination part comprises a base 18 made of a magnetic conductive material, and an armature 15 which is fixed on the base 18 and can rotate; and a power supply 17 for supplying current to the coils of the coil part 13. The core 12 includes a core body 120 and a contact end 121 located at one end of the core body 120 and integrated with the core body 120'. The other end of the core body 120 is fixedly connected to the base 18. The armature 15 is capable of rotational movement relative to the base 18 under the influence of the core 12 and a spring mechanism (not shown in fig. 2) to contact or separate from the contact terminals 121 of the core 12. When the electromagnetic mechanism 10 is in the attraction state shown in fig. 2, the iron core 12, the armature 15 and the base 18 form a magnetic conductive loop.

Fig. 3 is a perspective view of the electromagnetic mechanism shown in fig. 2 after the coil portion 13 and the core are assembled. The coil portion 13 includes a bobbin 11 as shown in fig. 4. The bobbin 11 is substantially a hollow cylindrical structure, and includes a bobbin body 111, a base portion 112 and a tip portion 113 fixed to opposite ends of the bobbin body 111, and pins 115 and 117 fixed to the base portion 112. The base portion 112 and the tip portion 113 are circular ring plate-shaped, and define an annular accommodation space with the outer side wall of the bobbin body 111 for winding the coil on the outer side wall of the bobbin body 111. The hollow portion of the bobbin 11 is for accommodating the core body 120 of the core 12.

As shown in fig. 3, the core body 120 of the core 12 is located in the accommodating space defined by the bobbin 11, and the contact end 121 of the core 12 is located outside the accommodating space defined by the bobbin 11. The contact end 121 of the core 12 includes intersecting second and first end faces 123, 124.

Fig. 5 shows a perspective view of the core 12 of the electromagnetic mechanism 10 shown in fig. 3, and fig. 6 shows a side view of the core 12 shown in fig. 5 as viewed along an intersection of the second end face and the first end face. The core 12 has a substantially cylindrical structure and includes a contact end 121 and a core body 120 integrally formed, the core body 120 has a cylindrical shape and an axis a2, and the contact end 121 has a substantially circular plate structure. The contact end 121 has a second end face 123 and a first end face 124 intersecting at a side for contacting the armature 15, wherein the second end face 123 is perpendicular to the axis a2, and the first end face 124 is at an angle, for example about 177 degrees, to the second end face 123. The first end surface 124 is inclined downwardly from the intersection line toward the sidewall of the contact end 121, thereby causing the thickness of the contact end 121 to gradually decrease.

To facilitate comparison of the electromagnetic mechanism 10 of the present embodiment with the prior art electromagnetic mechanism shown in fig. 1, fig. 7 is a schematic diagram illustrating the contact end of the iron core and the armature in contact with each other when the electromagnetic mechanism shown in fig. 1 and 2 is in an attraction state. In which the contact terminal 121 and the armature 15 of the present embodiment are shown in solid lines and the contact terminal 121 'and the armature 15' of figure i are shown in dashed lines. For comparison, the thickness a of the contact end 121 is equal to the thickness a ' of the contact end 121 ', the length b of the contact end 121 is equal to the length b ' of the contact end 121 ', the armature 15 is identical to the armature 15 ', and the position of the rotating shaft 151 of the armature 15 relative to the contact end 121 is the same as the position of the rotating shaft 151 ' of the armature 15 ' relative to the contact end 121.

As shown in fig. 7, the end face 123 ' of the contact end 121 ' can be regarded as a coplanar second end face 123 ' and first end face 124 ', in the attraction state, an edge portion 127 ' of the first end face 124 ' contacts with the armature 15 ', an air gap is formed between the other region of the first end face 124 ' and the armature 15 ', and an air gap is formed between the second end face 123 ' and the armature 15 '; in contrast, the first end face 124 of the contact end 121 is completely attached to the armature 15, i.e., the contact surface of the armature 15 is in contact with the first end face 124 and completely attached, and the second end face 123 of the contact end 121 is provided with an air gap with the armature 15.

The first end surface 124 of the contact end 121 abuts the armature 15 such that the air gap therebetween is close to zero, while the first end surface 124 ' of the contact end 121 ' is in line contact with the armature 15 ', and the air gap between the majority of the area of the first end surface 124 ' and the armature 15 ' is greater than zero. Since the electromagnetic attraction force is inversely proportional to the square of the air gap, the electromagnetic attraction force of the first end face 124 to the armature 15 is greater than the electromagnetic attraction force of the first end face 124 'to the armature 15'. On the other hand, the second end face 12 of the contact end 121, in the direction from the intersection line 126 to the edge 125, increases gradually in size from zero to d of the air gap with the armature 15; however, in the direction from the intersection line 126 ' to the edge 125 ', the size of the air gap between the second end face 123 ' of the contact end 121 ' and the armature 15 ' gradually increases from d1 ' to d2 '; since the position of the rotating shaft 151 of the armature 15 relative to the contact end 121 is the same as the position of the rotating shaft 151 ' of the armature 15 ' relative to the contact end 121 ', it can be known that the average air gap between the second end face 123 and the armature 15 is smaller than the average air gap between the second end face 123 ' and the armature 15 ', and for any micro-surface element on the second end face 123, it can be approximately considered that the electromagnetic attraction force applied to the micro-element is inversely proportional to the square of the shortest distance (i.e., the length of the air gap) from the micro-element to the armature 15, so that the electromagnetic attraction force of the second end face 123 to the armature 15 is larger than the electromagnetic attraction force of the second end face 123 ' to the armature 15 '. As can be seen, the total electromagnetic force of the contact end 121 on the armature 15 is greater than the total electromagnetic force of the contact end 121 'on the armature 15'.

In the attraction process of the electromagnetic mechanism 10, the contact end 121 of the iron core 12 is provided with a second end face 123 and a first end face 124 which are intersected, the armature 15 is completely attached to the first end face 124 at the attraction position, and an air gap is formed between the armature and the second end face 123, so that larger attraction force is realized on the basis of not increasing the induction magnetic field strength in the iron core 12; meanwhile, it is not necessary to increase the current in the coil portion 13 to increase the induced magnetic field strength, thereby avoiding an increase in remanence in the iron core 12 caused by the increased induced magnetic field strength.

The cross section of the contact end 121 perpendicular to the axis a2 is larger than the cross section of the core body 120 perpendicular to the axis a2, so that the magnetic flux passing through the core body 120 can more easily flow to the armature through the end face of the core (the second end face 123 or the first end face 124 of the contact end 121), and the possible leakage flux at the top end of the core near the edge portion (such as the connecting line between the top face and the side face) and the reduction of electromagnetic force are reduced.

Based on the above analysis, the factors affecting the total magnitude of the electromagnetic force include the ratio of the second end surface 123 to the first end surface 124, and the angle between the second end surface 123 and the first end surface 124. Since the first end face 124 is in full abutment with the armature 15, the greater the proportion of its total area occupied by the end face, the greater the electromagnetic attraction force. Under the condition that the relative position and distance between the rotating shaft 151 of the armature 15 and the contact end 121 are kept unchanged, the smaller the included angle between the first end surface 124 and the second end surface 123 is, the larger the ratio of the areas of the first end surface 124 and the second end surface 123 is, and therefore, the larger the electromagnetic attraction force is; the larger the included angle between the first end face and the second end face (for example, close to 180 degrees), the smaller the ratio of the area of the first end face to the area of the second end face, and the smaller the electromagnetic attraction force. Under the same condition, the larger the electromagnetic attraction force is, the shorter the time for the armature to complete the attraction action is correspondingly.

Referring again to FIG. 2, during attraction of the solenoid mechanism, the power supply 17 is controlled to provide the coil portion 13 with a first current value I₁So that the iron core 12 generates an electromagnetic force to complete the attraction. During the holding process after the solenoid mechanism completes the attraction (i.e., within a predetermined time from the end of the attraction to the release), the power supply 17 is controlled to supply the second current value I to the coil portion 13₂So that the armature 15 remains in contact with the contact terminal 121, wherein the second current value I₂Less than the first current value I₁。

When it is desired to release the armature 15, the control power supply 17 stops supplying the second current value I to the coil 13₂. The current in the coil part 13 disappears, only residual magnetism exists in the iron core 12, small electromagnetic force is generated on the armature 15, the acting force of the spring mechanism on the armature 15 is larger than the electromagnetic force of the residual magnetism in the iron core 12 on the armature 15, the armature 15 is driven to start rotating, and finally the electromagnetic mechanism is in a release state.

Since the coil 13 of the present embodiment is supplied with the smaller second current value I during the holding process₂No additional holding coil is required on the armature 11 for holding the armature 15 in the contact position. The electromagnetic mechanism 10 can maintain the armature 15 at its contact position, and effectively reduce the electrothermal loss in the coil part 13, with a more compact structure and a lower cost. During the release process, stopping the application of the second current value I₂The coil part 13 is supplied with electric energy, so that the remanence in the iron core 12 is reduced, the electromagnetic force generated by the remanence is reduced, and the time for releasing the armature 15 is shortened under the condition that other parameters are not changedAnd (3) removing the solvent.

Fig. 8 shows a schematic view of an electromagnetic mechanism according to a second embodiment of the invention. As shown in fig. 8, the structure of the electromagnetic mechanism 20 is substantially the same as that of the electromagnetic mechanism 10 shown in fig. 2, except that the first end surface 224 of the contact end is close to the rotating shaft 251, the second end surface 223 is far away from the rotating shaft, and the armature is arranged to be able to completely fit on the first end surface 224 when in the attraction position, and an air gap exists with the second end surface 223, so the electromagnetic mechanism 20 has a larger magnetic attraction force and the attraction time is shorter.

Fig. 9 shows a schematic view of an armature and a core in an electromagnetic mechanism 30 according to a third embodiment of the present invention. The end of the core 32 has two end faces, a second end face 323 and a first end face 324, the second end face 323 and the first end face 324 are not perpendicular to the axis a3 of the core 32, and the armature 35 completely fits the first end face 324 at the attraction position. The iron core 32 is in a column shape, and the processing is simpler and more convenient.

According to the utility model discloses a various embodiments, can be according to in the actual operation to the area ratio of the second terminal surface of the corresponding adjustment contact jaw of different demands of actuation time, release time and first terminal surface and contained angle size between them. At the same time, a smaller second current I is supplied to the coil as a result of the holding phase being set₂It is also necessary to consider the ratio of the contribution of the remanence generated by interrupting the current to the reduction of the electromagnetic attraction force to reduce the release time, and then to set the area ratio of the second end face to the first end face in combination. In addition, the relevant factors for the above adjustment include the transmission system specification of the device, the power supply specification, the total energy requirement of the system, the cost control, the quality control, etc. In other embodiments of the present invention, an included angle between the first end surface 124 and the second end surface 123 is preferably greater than or equal to 165 degrees and less than 180 degrees, more preferably greater than or equal to 175 degrees and less than or equal to 179 degrees, and more preferably greater than or equal to 177 degrees and less than or equal to 178 degrees; the area ratio of the second end face 123 to the first end face 124 is preferably 0.1 or more and 10 or less, more preferably 0.3 or more and 3 or less, and still more preferably 0.8 or more and 1.25 or less.

In other embodiments of the present invention, the electromagnetic mechanism further includes an air gap pad disposed on the second end surface, and when the armature is in the attraction, the air gap pad provides a buffer to reduce the possibility of damage caused by the impact force of the armature on the iron core.

The present invention is not intended to be limited to the shape of the core 12 being cylindrical, for example, the base 18 may also be constructed as a portion of the core 12. In other embodiments, the core may have other shapes such as U-shape or E-shape.

Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the invention to the embodiments described herein, but rather, to include various changes and modifications without departing from the scope of the invention.

Claims (11)

1. A clapper-type electromagnetic mechanism, comprising:

a magnetic part including an iron core;

a split-combination portion including an armature;

the iron core is provided with a contact end which is in contact with the armature, the contact end comprises at least one first end face, and when the armature is located at a pull-in position, the armature is attached to the first end face.

2. The clapper electromagnetic mechanism of claim 1, wherein the contact end further comprises a second end face with an air gap therebetween when the armature is engaged with the first end face.

3. The clapper electromagnetic mechanism of claim 2 wherein the second end face is perpendicular to a longitudinal axis of the core.

4. The clapper electromagnetic mechanism of claim 2 wherein the second end face is non-perpendicular to a longitudinal axis of the core.

5. The clapper electromagnetic mechanism of claim 3 wherein the angle between the first and second end faces is not less than 165 degrees and less than 180 degrees.

6. The clapper electromagnetic mechanism of claim 3 wherein the area ratio of the first end face to the second end face is not less than 0.1 and not more than 10.

7. The clapper electromagnetic mechanism of claim 1 further comprising a coil surrounding the core and a power source electrically connected to two terminals of the coil, the power source being controlled to provide a first current to the coil during a pull-in process of the clapper electromagnetic mechanism and a second current to the coil during a hold process of the clapper electromagnetic mechanism, wherein the second current is less than the first current.

8. The clapper electromagnetic mechanism of any one of claims 2 to 6 further comprising an air gap pad disposed on the second end face.

9. The clapper-type electromagnetic mechanism according to any one of claims 1 to 6, wherein the iron core comprises an iron core body fixedly connected with the contact end, the iron core body is cylindrical, and the cross-sectional area of the contact end on a plane perpendicular to the longitudinal axis of the iron core is larger than that of the iron core body on a plane perpendicular to the longitudinal axis of the iron core.

10. The clapper-type electromagnetic mechanism according to claim 7, wherein the iron core comprises an iron core body fixedly connected with the contact end, the iron core body is cylindrical, and the cross-sectional area of the contact end on a plane perpendicular to the longitudinal axis of the iron core is larger than that of the iron core body on a plane perpendicular to the longitudinal axis of the iron core.

11. The clapper electromagnetic mechanism of claim 10 further comprising a bobbin defining a receiving space for receiving the core body, the coil being wound on an outer side of the bobbin;

the skeleton includes:

the framework body is in a cylindrical or tubular shape with two open ends;

the base part and the top end part are fixed at two opposite ends of the framework body and are in circular ring plate shapes, and the annular accommodating space is limited by the outer side wall of the framework body.

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