JPWO2016046946A1 - Magnetic contactor and method of assembling electromagnetic contactor - Google Patents

Abstract

The magnetic contactor can be equipped with a polarized electromagnet (2) and a movable contact, can be fitted with a contactable carrier attached to the first movable iron core plate (10a), and a fixed contact, A case that covers the carrier, and a rear case that houses the polarized electromagnet (2) and is coupled to the case; the coil bobbin (9) includes a first engagement protrusion on the upper surface; In a state in which the carrier is attached to the first movable iron core plate (10a), a second engagement protrusion is provided to face the first engagement protrusion with a clearance of a preset distance.

Description

  The present invention relates to an electromagnetic contactor having a polarized electromagnet in which a permanent magnet and a coil are combined and an assembling method thereof.

  An electromagnetic contactor disclosed in Patent Document 1 includes a polarized electromagnet in which a permanent magnet and a coil are combined, a movable carrier to which a movable contact is attached, a stationary contact that is in contact with and away from the movable contact, and a polarized electromagnet And a case that covers the accessible carrier and engages the rear case. The polarized electromagnet includes a coil formed by winding a conductive wire, a coil bobbin around which the coil is wound, a movable iron core that passes through the coil bobbin in the axial direction, and a U-shaped fixed iron core that is installed to face the movable iron core. And a magnetic pole plate disposed opposite to the coil and a permanent magnet installed on the fixed iron core. A movable carrier on which a movable contact is mounted is attached to the movable iron core plate, and the movable contact is displaced by the same amount in accordance with the displacement of the movable iron core.

  In the electromagnetic contactor disclosed in Patent Document 1, in a state where the coil is not excited, the movable iron core is attracted to the magnetic pole plate by the magnetic force of the permanent magnet, so that the movable contact and the stationary contact are separated from each other. Maintained. When the coil is excited, a magnetic field that cancels the magnetic field of the permanent magnet is generated between the movable iron core and the fixed iron core, the movable iron core plate is displaced toward the fixed iron core plate, and the movable contact and the fixed contact are in contact with each other. .

JP 2010-62079 A

  The electromagnetic contactor is required to prevent foreign matter from entering and remaining in the product from the viewpoint of malfunction due to foreign matter pinching in the drive unit and contact life reduction due to foreign matter pinching between the contacts. Therefore, the electromagnetic contactor needs to be assembled in a procedure in which a foreign body is eliminated as much as possible while using a housing having as few openings as possible.

  However, Patent Document 1 does not disclose an assembly procedure for an electromagnetic contactor that takes into account the prevention of entry and retention of foreign matter.

  In addition, the electromagnetic contactor disclosed in Patent Document 1 lifts the polarized electromagnet by holding only the case with the polar electromagnet attached to the case by inserting a contactable carrier with a movable contact installed in the case. Then, the contactable carrier descends due to the weight of the polarized electromagnet. When the contactable carrier is lowered by the weight of the polarized electromagnet, the movable contact is displaced more than the displacement amount of the variable carrier and comes into contact with the fixed contact, so that the movable contact is deformed.

  In order to prevent the deformation of the movable contact, it is necessary to have the case and the polarized electromagnet at the same time. However, if the case and the polarized electromagnet are held with both hands, the work efficiency of the assembly work is lowered. Therefore, when the case is lifted, an engagement structure between the case and the polarized electromagnet that can lift the entire structure excluding the rear case without contacting the movable contact and the stationary contact is required.

  The present invention has been made in view of the above, and when the case is lifted, the entire structure excluding the rear case can be lifted without contacting the movable contact and the fixed contact. An object is to obtain an electromagnetic contactor having an engagement structure with an electromagnet.

  In order to solve the above-described problems and achieve the object, the present invention is a coil formed by winding a conductive wire around a coil bobbin, and a U-shape in which end plate portions extend from both ends of the side plate portion, A pair of U-shapes in which the end plate portion is opposed to one end of the coil, the other end plate portion is spaced apart and opposed to the other end of the coil, and the coil is disposed inside so that the side plate portion is opposed to the outer peripheral portion of the coil. A fixed iron core, a pair of permanent magnets arranged inside the side plate portion of the U-shaped fixed iron core, and a first end of a U-shaped fixed iron core positioned at one end of the iron core rod inserted through the coil. A movable iron core plate, and a movable iron core provided with a second movable iron core plate located between the other end of the coil and the other end plate portion of the U-shaped fixed iron core at the other end of the iron core rod. A polarized electromagnet and a movable contact can be mounted and attached to the first movable iron core plate. A contactable carrier, a case that can be attached to the fixed contact, and a case that covers the contactable carrier, and a rear case that accommodates the polarized electromagnet and is connected to the case. The case includes a protrusion for engagement, and the case has a second engagement protrusion facing the first engagement protrusion with a predetermined distance clearance in a state where the contactable carrier is attached to the first movable iron core plate. It is characterized by providing.

  The electromagnetic contactor according to the present invention has an effect that when the case is lifted, the entire structure excluding the rear case can be lifted without the movable contact and the fixed contact coming into contact with each other.

The perspective view of the magnetic contactor which concerns on embodiment of this invention Sectional drawing of the magnetic contactor concerning embodiment of this invention Sectional drawing of the polar electromagnet of the electromagnetic contactor concerning an embodiment The perspective view of the polarized electromagnet of the electromagnetic contactor concerning an embodiment The perspective view of the contactable carrier of the electromagnetic contactor concerning an embodiment The perspective view of the case of the magnetic contactor concerning an embodiment The perspective view of the case of the magnetic contactor concerning an embodiment Sectional drawing of the part except the rear case of the magnetic contactor concerning embodiment in the state which passed the engaging part of the contactable carrier through the notch provided in the movable iron core board Sectional drawing of the part except the rear case of the magnetic contactor concerning embodiment in the state which slid the case in which the contactable carrier was inserted to + z direction Sectional drawing of the part except the rear case in the assembly state of the magnetic contactor concerning embodiment The elements on larger scale of the magnetic contactor concerning embodiment The elements on larger scale of the magnetic contactor concerning embodiment Sectional drawing inside the case of the magnetic contactor according to the embodiment Sectional drawing of the part except the rear case in the state which lifted the case of the magnetic contactor concerning embodiment The elements on larger scale of the magnetic contactor concerning embodiment The elements on larger scale of the magnetic contactor concerning embodiment Sectional drawing inside the case of the magnetic contactor according to the embodiment

  Below, the electromagnetic contactor concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a perspective view of an electromagnetic contactor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the electromagnetic contactor according to the embodiment of the present invention. In the following description, the direction indicated by the arrow x in the figure is the x direction, the direction indicated by the arrow y is the y direction, and the direction indicated by the arrow z is the z direction. The same direction as the arrow is the + direction, and the opposite direction to the arrow is the-direction. As an example, the same direction as the arrow x is the + x direction, and the opposite direction to the arrow x is the -x direction. About the figure which shows only a part of component of the magnetic contactor 1, the direction which becomes in the assembly state shown in FIG. 1 is shown by the arrow x, the arrow y, and the arrow z.

  The magnetic contactor 1 includes a polarized electromagnet 2 in which a permanent magnet and a coil are combined, a contactable carrier 4 to which a movable contact 6 is attached, a fixed contact 5 that is in contact with and away from the movable contact 6, and a polarized electromagnet 2. And a cylindrical rear case 7 for housing the housing. The electromagnetic contactor 1 also has a case 3 that covers the contactable carrier 4. A fixed contact 5 can be attached to the case 3.

  FIG. 3 is a cross-sectional view of a polarized electromagnet of the electromagnetic contactor according to the embodiment. The polarized electromagnet 2 has a coil 8 formed by winding a conductive wire around a coil bobbin 9, one end plate portion 12 a facing one end 8 a of the coil 8, and the other end plate portion 12 b placed on the other end 8 b of the coil 8. It has a pair of U-shaped fixed iron cores 12 in which the coil 8 is arranged so that the side plate portion 12c faces the outer peripheral portion 8c of the coil 8 so as to face each other. In addition, the polarized electromagnet 2 includes a pair of permanent magnets 13 disposed inside the side plate portion 12 c of the U-shaped fixed core 12 and one end 10 d 1 of the iron core rod 10 d inserted through the coil 8, and one of the U-shaped fixed core 12. The first movable iron core plate 10a is provided outside the end plate portion 12a, and the other end 10d2 of the iron core rod 10d is provided between the other end 8b of the coil 8 and the other end plate portion 12b of the U-shaped fixed iron core 12. And a movable iron core 10 provided with a second movable iron core plate 10b. In the polarized electromagnet 2, a fixed iron core plate 11 made of a magnetic material is disposed inside the permanent magnet 13. The distance between the second movable iron core plate 10b and the other end plate portion 12b of the U-shaped fixed iron core 12 is L2. That is, the movable iron core 10 has a displacement amount of the distance L2.

  The U-shaped fixed iron core 12 has a U shape in which end plate portions 12a and 12b extend from both ends of the side plate portion 12c. The U-shaped fixed iron core 12 has a U-shaped cross-sectional shape perpendicular to the x direction, that is, a cross-sectional shape including a plane extending in the y direction and the z direction.

  FIG. 4 is a perspective view of a polarized electromagnet of the electromagnetic contactor according to the embodiment. FIG. 5 is a perspective view of a contactable carrier of the electromagnetic contactor according to the embodiment. 6 and 7 are perspective views of the case of the magnetic contactor according to the embodiment. As shown in FIG. 4, the engagement carrier 4a of the contactable carrier 4 shown in FIG. 5 is engaged with the notch 10c provided in the first movable iron core plate 10a so that the attachment carrier 4 becomes the first. It is attached to the movable iron core plate 10a. As shown in FIG. 4, first engaging protrusions 9 b and 9 c are formed on the upper surface 9 a of the coil bobbin 9 of the polarized electromagnet 2. As shown in FIG. 6, second engagement protrusions 3 b and 3 c are formed on the lower surface 3 a of the case 3. The second engaging protrusion 3c is provided with a step 3d for holding the first engaging protrusion 9c. The step 3d prevents the first engagement protrusion 9c and the second engagement protrusion 3c from being disengaged when the second engagement protrusion 3c is engaged with the first engagement protrusion 9c. To do.

  In the state where the coil 8 shown in FIG. 2 is not excited, the second movable iron core plate 10 b is attracted to the fixed iron core plate 11 by the magnetic force of the permanent magnet 13, and therefore the movable contact 6 and the fixed contact 5. Is maintained in a state separated by a distance L1.

  When the coil 8 is excited, a magnetic field that cancels the magnetic field generated by the permanent magnet 13 acts between the movable iron core 10 and the U-shaped fixed iron core 12, and the movable iron core 10 is displaced toward the U-shaped fixed iron core 12 by a distance L2. As a result, the movable contact 6 and the fixed contact 5 come into contact with each other. Accordingly, the distance L2, which is the displacement amount of the movable iron core 10, is larger than the distance L1 and has a relationship of L2> L1.

  An assembly procedure of the magnetic contactor according to the embodiment will be described. In the first procedure, the movable contact 6 is mounted on the movable carrier 4 and inserted into the case 3. In the second procedure, the fixed contact 5 is attached to the case 3 and dust is removed by air blow. In the third procedure, the polarized electromagnet 2 is mounted on the contactable carrier 4. In the fourth procedure, the polarized electromagnet 2 having the structure assembled in the first, second and third procedures is inserted into the cylinder of the rear case 7 so that the case 3 and the rear case 7 are combined. In the above assembling procedure, the step of inserting the polarized electromagnet 2 into the cylinder of the rear case 7 is set as the final step, thereby realizing a structure in which foreign matter generated during the assembly does not remain in the rear case 7 as much as possible.

  That is, in the magnetic contactor 1 having the polarized electromagnet 2, after inserting the contactable carrier 4 with the movable contact 6 into the case 3, the fixed contact 5 is mounted, and the polarized electromagnet 2 and the contactable carrier 4. Is assembled to the case 3 and finally assembled with the rear case 7 to realize an assembling procedure with little foreign matter remaining.

  In the above assembling procedure, it is conceivable to remove dust by air blow after assembling. However, since the rear case 7 is not provided with an opening in order to prevent entry of foreign matter from the outside, the case 3 and the rear case 7 Dust removal after coalescing cannot be performed.

  Next, a procedure for assembling the structure including the case 3, the contactable carrier 4, the fixed contact 5 and the movable contact 6 and the polarized electromagnet 2 will be described. First, the movable contact 5 is mounted on the contactable carrier 4 and inserted into the case 3. Next, the case 3 in which the accessible carrier 4 is inserted is moved in the -y direction so that the engaging portion 4a of the accessible carrier 4 is passed through the notch 10c provided in the first movable iron core plate 10a. FIG. 8 is a cross-sectional view of a portion excluding the rear case of the electromagnetic contactor according to the embodiment in a state where the engagement portion of the accessible carrier is passed through the notch provided in the movable iron core plate.

  After passing the engagement portion 4a through the notch 10c, the case 3 with the insertable carrier 4 inserted is slid in the + z direction so that the attachable carrier 4 and the first movable iron core plate 10a are engaged. The contactable carrier 14 and the polarized electromagnet 2 are connected. By the above assembly procedure, the structure including the polarized electromagnet 2, the case 3, the contactable carrier 4, the fixed contact 5, and the movable contact 6, that is, the structure excluding the rear case 7 from the electromagnetic contactor 1 is assembled. It is done.

  FIG. 9 is a cross-sectional view of a portion excluding the rear case of the magnetic contactor according to the embodiment in a state where the case in which the accessible carrier is inserted is slid in the + z direction. By sliding the case 3 in which the contactable carrier 4 is inserted in the + z direction, the upper surface 3b1 of the second engagement protrusion 3b and the lower surface 9b1 of the first engagement protrusion 9b are opposed to each other in the y direction. The upper surface 3c1 of the engaging protrusion 3c and the lower surface 9c1 of the first engaging protrusion 9c face each other in the y direction.

  FIG. 10 is a cross-sectional view of a portion excluding the rear case in the assembled state of the magnetic contactor according to the embodiment. FIG.11 and FIG.12 is the elements on larger scale of the electromagnetic contactor concerning Embodiment. FIG. 11 shows the A portion and its surroundings in FIG. 10 in an enlarged manner, and FIG. 12 shows the B portion and its surroundings in FIG. 10 in an enlarged manner. FIG. 13 is a cross-sectional view of the inside of the case of the electromagnetic contactor according to the embodiment. When the case 3 in which the contactable carrier 4 is inserted is slid in the + z direction, the second engagement protrusion 3b and the first engagement protrusion 9b are not completely engaged. In the assembled state, the upper surface 3b1 of the second engagement protrusion 3b and the lower surface 9b1 of the first engagement protrusion 9b, and the upper surface 3c1 of the second engagement protrusion 3c and the first engagement protrusion A clearance of a distance L3 is provided between the lower surface 9c1 of 9c as shown in FIG. The clearance distance L3 is smaller than the distance L2 shown in FIG. 2 and has a relationship of L3 <L2. Further, the clearance distance L3 is smaller than the distance L1 between the movable contact 6 and the fixed contact 5 when the coil 8 is not excited, and has a relationship of L1 <L3.

  FIG. 14: is sectional drawing of the part except the rear case in the state which lifted the case of the magnetic contactor concerning embodiment. FIG.15 and FIG.16 is the elements on larger scale of the electromagnetic contactor concerning Embodiment. FIG. 15 is an enlarged view of the portion C in FIG. 14 and its surroundings, and FIG. 16 is an enlarged view of the portion D in FIG. 14 and its surroundings. FIG. 17 is a cross-sectional view of the inside of the case of the electromagnetic contactor according to the embodiment.

  When the case 3 is lifted in the + y direction with the contactable carrier 4 and the first movable iron core plate 10a engaged, the lower surface 9b1 of the first engagement protrusion 9b and the second engagement protrusion 3b The upper surface 3b1 is in contact with the lower surface 9c1 of the first engagement protrusion 9c and the upper surface 3c1 of the second engagement protrusion 3c is in contact with the second engagement protrusions 3b, 3c and the first engagement protrusion 9b. , 9c are completely engaged. Therefore, when the case 3 is lifted in the + y direction, the polarized electromagnet 2 having the coil bobbin 9 is suspended from the case 3.

  The electromagnetic contactor 1 according to the embodiment described above includes the first engagement protrusions 9b and 9c on the upper surface 9a of the coil bobbin 9, and the second engagement protrusions 3b and 3c provided on the lower surface 3a of the case 3. However, when the case 3 is not lifted in the + y direction, it is not completely engaged. With such a structure, the magnetic contactor 1 can be easily assembled only by sliding the contactable carrier 4 in the + z direction after engaging the first movable iron core plate 10a. Moreover, since it is not necessary to use a tool when the electromagnetic contactor 1 is assembled or disassembled, man-hours can be reduced as compared with the case of screwing or the case of fitting claws.

  The first engaging protrusions 9b and 9c of the coil bobbin 9 abut against the second engaging protrusions 3b and 3c of the case 3 only when the polarized electromagnet 2 is suspended while holding the case 3, and in the assembled state. The first engaging protrusions 9b and 9c do not interfere with the second engaging protrusions 3b and 3c.

  When the first engaging protrusions 9b and 9c are in contact with the second engaging protrusions 3b and 3c in the assembled state, the displacement of the movable contact 6 when the coil 8 is excited and the movable iron core 10 moves. May differ from the design value and may affect product performance. However, since the magnetic contactor 1 according to the embodiment does not interfere with the first engaging protrusions 9b and 9c and the second engaging protrusions 3b and 3c in the assembled state, the first engaging protrusions 9b and 9c Even if the 9c and the second engaging protrusions 3b and 3c are provided, the possibility that the product performance is lowered can be reduced.

  The clearance distance L3 is shorter than the distance L1 between the movable contact 6 and the fixed contact 5 in the non-excited state of the coil, and is fixed to the movable contact 6 by the weight of the polarized electromagnet 2 during assembly work. The reduction amount of the distance between the contact 5 becomes the distance L1 or more, and it is possible to prevent the movable contact 6 and the fixed contact 5 from coming into contact with each other and being damaged. Thereby, it is possible to prevent a defective product from being generated due to the deformation of the movable contact 6 during the assembly operation and a decrease in yield. Moreover, energy consumption in the production process can be suppressed by shortening the assembly work time.

  A step 3d that holds the first engagement protrusion 9c on the second engagement protrusion 3c of the case 3 and prevents the engagement between the first engagement protrusion 9c and the second engagement protrusion 3c is released. By providing, when the case 3 is tilted with the polarized electromagnet 2 suspended, it is possible to prevent the first movable iron core plate 10a and the contactable carrier 4 from being disengaged due to the weight of the polarized electromagnet 2. it can. Here, the configuration in which the step 3d is provided only on the second engagement protrusion 3c is taken as an example, but the first engagement protrusions 9b and 9c are held on at least one of the second engagement protrusions 3b and 3c. If the level | step difference for performing is provided, the effect which prevents that the engagement with the 1st movable iron core board 10a and the accessible carrier 4 by the dead weight of the polarized electromagnet 2 will be acquired is acquired.

  As described above, the electromagnetic contactor 1 according to the first embodiment is configured so that the upper case 3 is assembled to the rear case 7 after assembling the polarized electromagnet 2 to the upper case 3. An assembly method can be realized in which the generated foreign matter does not remain in the rear case 7 as much as possible. The electromagnetic contactor 1 can be easily assembled because the poled electromagnet 2 can be suspended from the upper case 3. Furthermore, since a certain clearance is provided between the first engaging protrusions 9b and 9c and the second engaging protrusions 3b and 3c, even if the case 3 is lifted and the polarized electromagnet 2 is suspended, The movable contact 6 and the fixed contact 5 are not in contact with each other, and deformation and breakage of the movable contact 6 can be prevented.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Magnetic contactor, 2 Polarized electromagnet, 3 Case, 3a Lower surface, 3b, 3c 2nd protrusion for engagement, 3d level | step difference, 4 Contactable carrier, 4a Engagement part, 5 Fixed contact, 6 Movable contact, 7 Rear case, 8 coil, 9 coil bobbin, 9a upper surface, 9b, 9c first engaging protrusion, 10 movable iron core, 10a first movable iron core plate, 10b second movable iron core plate, 10c notch, 10d iron core rod, 11 Fixed iron core plate, 12 U-shaped fixed iron core, 13 Permanent magnet.

Claims (4)

A coil formed by winding a conductive wire around a coil bobbin, and a U-shape in which end plate portions extend from both ends of the side plate portion, one end plate portion being opposed to one end of the coil, and the other end plate A pair of U-shaped fixed iron cores in which the coil is disposed so as to be opposed to the other end of the coil, and the side plate portion is opposed to the outer peripheral portion of the coil, and the side plate portions of the U-shaped fixed iron core A pair of permanent magnets arranged on the inner side of the iron core rod, and a first movable iron core plate positioned outside one end plate portion of the U-shaped fixed iron core at one end of the iron core rod inserted through the coil; A movable iron core provided with a second movable iron core plate located between the other end of the coil and the other end plate portion of the U-shaped fixed iron core,
A movable carrier that can be mounted with a movable contact and is attached to the first movable iron core; and
A case that can be fitted with a stationary contact and covers the contactable carrier;
A rear case that houses the polarized electromagnet and is coupled to the case;
The coil bobbin includes a first engagement protrusion on an upper surface,
The case includes a second engagement protrusion facing the first engagement protrusion with a predetermined distance clearance in a state where the accessible carrier is attached to the first movable core plate. An electromagnetic contactor characterized by that.   The electromagnetic contactor according to claim 1, wherein the clearance is smaller than a distance between the movable contact and the fixed contact in a state where the coil is not excited.   The second engagement protrusion has a step that prevents the first engagement protrusion and the second engagement protrusion from being disengaged in a state of being engaged with the first engagement protrusion. The electromagnetic contactor according to claim 1. An assembly method for an electromagnetic contactor according to any one of claims 1 to 3,
Attaching the movable contact to the accessible carrier;
Inserting the connectable carrier with the movable contact into the case;
Attaching the fixed contact to the case in which the accessible carrier is inserted;
Removing the dustable carrier mounted with the stationary contact;
Engaging the connectable carrier with the first movable iron core plate and connecting the connectable carrier and the polarized electromagnet;
A method of assembling an electromagnetic contactor, comprising: inserting the polarized electromagnet into the rear case and connecting the rear case and the case.

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