CN117223080A - Electromagnetic contactor and method for assembling electromagnetic contactor - Google Patents

Abstract

The plunger type electromagnet unit is constituted by integrally assembling a contact support (28) dedicated to the plunger type electromagnet on an upper frame (11B), or the column type electromagnet unit is constituted by integrally assembling a contact support (55) dedicated to the column type electromagnet on an upper frame. Then, the connection springs (18, 76) of one of the plunger electromagnet (12) and the column electromagnet (60) are slidably inserted into the openings of the connection insertion portions (32 a, 32 b) or (75 a, 75 b) of one of the plunger electromagnet unit and the column electromagnet unit. Then, the upper edge of the lower frame (11A) is engaged with the lower edge of the upper frame to form a housing.

Description

Electromagnetic contactor and method for assembling electromagnetic contactor

Technical Field

The present invention relates to an electromagnetic contactor and an assembling method of the electromagnetic contactor.

Background

As an electromagnetic contactor, there is known an apparatus including: a lower frame and an upper frame forming a main body casing divided up and down; a contact mechanism built in the upper frame; and an operating electromagnet which is built in the lower frame and drives the contact mechanism on/off, the contact mechanism comprises: a fixed contact fixed to the upper frame; a contact support member movably disposed in the upper frame and connected to the operation electromagnet; and a movable contact supported by the contact support, the movable contact being in contact with and separated from the fixed contact of the fixed contact (for example, patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2015-118915

Disclosure of Invention

Technical problem to be solved by the invention

Further, as an operation electromagnet of the electromagnetic contactor, one of a plunger electromagnet (plunger-type electromagnet) and a column electromagnet (leg-type electromagnet) is used. The plunger type electromagnet is an electromagnet having a plunger that moves up and down and an armature that protrudes to the outside from the end of the plunger, and the plunger type electromagnet is an electromagnet having a movable core that moves up and down. According to the different structures of the plunger type electromagnet and the column type electromagnet, different connection structures of the contact mechanism and the operation electromagnet are used.

Therefore, in the conventional electromagnetic contactor assembly, the plunger type electromagnet and the column type electromagnet are assembled by using different steps, and different assembly lines are required, so that the number of steps is large, the assembly lines are long, the equipment investment is increased, and the manufacturing cost of the electromagnetic contactor is problematic.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electromagnetic contactor and an assembling method of the electromagnetic contactor, which can share a part of an assembling line, reduce the number of assembling steps, shorten the assembling line, reduce the investment of assembling equipment, and reduce the manufacturing cost when manufacturing the electromagnetic contactor using one of a plunger electromagnet and a column electromagnet as an operation electromagnet.

Technical proposal for solving the problems

In order to achieve the above object, an electromagnetic contactor according to the present invention includes: a lower frame and an upper frame forming a shell divided up and down; a contact mechanism, comprising: a movable contact having a pair of movable contacts, a pair of fixed contacts having fixed contacts capable of contacting and separating with the pair of movable contacts, and a contact support for supporting the movable contacts, which are disposed inside the upper frame; and an electromagnet for operation, which is disposed in the lower frame, and which drives the contact mechanism on/off via the contact support, and which is capable of connecting the contact support and the electromagnet by sliding the contact support in a direction intersecting a driving direction of the electromagnet, wherein the contact support and the electromagnet are connected by sliding the contact support in a state in which the contact support is integrally assembled to the upper frame in the electromagnetic contactor.

In addition, one aspect of the method for assembling an electromagnetic contactor according to the present invention is the method for assembling an electromagnetic contactor described above, comprising: a first assembling step of assembling the upper frame and the contact support of the contact mechanism into a single body; a second assembly step of slidably inserting the contact support held together with the upper frame into the electromagnet; and a third assembling step of engaging the upper edge of the lower frame with the lower edge of the upper frame to form the housing.

Effects of the invention

According to the electromagnetic contactor and the method of assembling the electromagnetic contactor of the present invention, in the case of manufacturing the electromagnetic contactor using one of the plunger-type electromagnet and the column-type electromagnet as the operation electromagnet, the contact support dedicated to the plunger-type electromagnet is integrally assembled on the upper frame as the plunger-type electromagnet unit, or the contact support dedicated to the column-type electromagnet is integrally assembled on the upper frame as the column-type electromagnet unit. Further, since the coupling insertion portion of one of the plunger-type electromagnet unit and the column-type electromagnet unit is coupled to one of the plunger-type electromagnet and the column-type electromagnet, the step of assembling the contact support on the upper frame can be shared as an initial step. Accordingly, compared with an assembly line of a conventional electromagnetic contactor in which a series of steps of the electromagnetic contactor are performed by different assembly lines in the case of using a plunger type electromagnet and a column type electromagnet as operation electromagnets, it is possible to construct an assembly line in which the number of assembly steps is reduced. In addition, the invention can shorten the size of the production line, reduce the investment of assembly equipment, and realize the reduction of manufacturing cost when manufacturing the electromagnetic contactor using one of the plunger type electromagnet and the column type electromagnet as the operation electromagnet.

Drawings

Fig. 1 is a perspective view showing an electromagnetic contactor according to a first embodiment of the present invention.

Fig. 2 is a view showing an electromagnetic contactor according to a first embodiment of the present invention from the front.

Fig. 3 is a cross-sectional view showing an electromagnetic contactor according to the first embodiment using a plunger type electromagnet as an operation electromagnet.

Fig. 4 is a diagram showing a plunger electromagnet constituting an electromagnetic contactor according to the first embodiment.

Fig. 5 is a perspective view showing a structure of a contact support constituting a contact mechanism dedicated to a plunger type electromagnet in the first embodiment.

Fig. 6 is a perspective view showing an upper frame constituting a contact mechanism dedicated to the plunger type electromagnet and a contact support arranged on the upper frame in the first embodiment.

Fig. 7 is a diagram showing the inside of a circle indicated by reference character a in fig. 3 in an enlarged manner.

Fig. 8 is a view showing an electromagnetic contactor according to the first embodiment from above.

Fig. 9 is a diagram showing a state in which a contact support of a contact mechanism dedicated to a plunger type electromagnet and an upper frame are relatively moved so that a contact gap between a fixed contact and a movable contact is eliminated in the first embodiment.

Fig. 10 is a diagram showing an initial state in which a contact mechanism dedicated to the plunger type electromagnet is slidingly moved relative to the electromagnet without interfering with a part (front flange portion) of the electromagnet by a step portion formed in the upper frame, and the coupling insertion portion of the contact support is coupled to the coupling spring of the electromagnet.

Fig. 11 is a diagram showing a state in which the connection between the connection insertion portion of the contact support and the connection spring of the electromagnet is completed by sliding movement in the contact mechanism dedicated to the plunger type electromagnet, and the step portion of the upper frame is moved to a position where it does not interfere with a part of the electromagnet.

Fig. 12 is a sectional view showing an electromagnetic contactor according to a second embodiment using a column electromagnet as an operation electromagnet.

Fig. 13 is a perspective view showing a structure of a contact support constituting a contact mechanism dedicated to a column electromagnet in the second embodiment.

Fig. 14 is a diagram showing a state in which a plunger electromagnet having a movable core is coupled to a contact support dedicated to the plunger electromagnet in the second embodiment.

Detailed Description

Next, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. It should be noted, however, that the drawings are schematic, the relationship of thickness to planar dimensions, the ratio of thickness of the layers, etc. are different from real products. Therefore, specific thicknesses and dimensions should be determined with reference to the following description. It is needless to say that the drawings include portions having different dimensional relationships and ratios from each other.

In the following embodiments, an apparatus and a method for embodying the technical idea of the present invention are described by way of example, and the technical idea of the present invention is not limited to the following materials, shapes, structures, arrangements, and the like of constituent members. The technical idea of the present invention can be variously modified within the technical scope defined by the claims.

In the following description, terms such as "upper", "lower", "left", "right", "bottom", "front", "rear", "long dimension", "short dimension" and the like are used with reference to the drawings.

An electromagnetic contactor 10 according to a first embodiment of the present invention will be described with reference to fig. 1 to 11.

The electromagnetic contactor 10 of the first embodiment shown in fig. 1 is configured as a housing by connecting a first housing 11A and a second housing 11B to each other in the front-rear direction. Mounting plate portions 51 are formed at four bottom corners of the bottomed cylindrical portion 50 of the first frame 11A. The second frame 11B has a square cylindrical portion 52 whose front end opposite to the bottomed square cylindrical portion 50 of the first frame 11A is open.

In front of the square tube portion 52 of the second chassis 11B, as shown in fig. 2, a power supply side terminal portion 53a and an auxiliary terminal portion 54a are formed in the upper portion, and a load side terminal portion 53B and an auxiliary terminal portion 54B are formed in the lower portion.

Fig. 3 shows an internal structure of the electromagnetic contactor 10, which includes a contact mechanism 13 built in the second housing 11B, and a plunger electromagnet 12 built in the first housing 11A (not shown in fig. 3) and on/off-driving the contact mechanism 13 to be used as an operation electromagnet.

As shown in fig. 3, the plunger electromagnet 12 includes a spool 14, a plunger 15, an outer yoke 16, an exciting coil 21, a first armature 24, and a second armature 25. The spool 14 includes a cylindrical portion 17, and a front flange portion 19 and a rear flange portion 20 protruding in the radial direction at both axial end portions of the cylindrical portion 17. An exciting coil 21 is wound around the outer periphery of the cylindrical portion 17 of the spool 14. A coil terminal 22 for supplying current to the exciting coil 21 is attached to the front flange 19 of the spool 14.

Further, the plunger 15 is a columnar rod-like body inserted into the cylindrical portion 17 of the spool 14, and as shown in fig. 4, a first armature 24 and a second armature 25 protruding in the radial direction are connected to both axial end portions of the plunger 15.

A coupling spring 18 is fixed to a central portion of the first armature 24. The coupling spring 18 is formed of a long metal plate, and includes a fixed plate portion 18a fixed to the first armature 24, and a pair of elastic engagement plate portions 18b, 18c rising obliquely upward from the fixed plate portion 18a and provided with a curvature portion on the tip side.

As shown in fig. 3, the contact mechanism 13 includes: a plurality of sets of power-side fixed contacts 26a and load-side fixed contacts 26B fixed to the second frame 11B and arranged in the left-right direction; a contact support 28 movably mounted in the front-rear direction inside the second frame 11B; and a plurality of movable contacts 27 supported by the contact support 28 and movable in the front-rear direction so that the movable contacts 27a, 27b can contact and separate from the fixed contacts 26a1 of the plurality of sets of power source side fixed contacts 26a and the fixed contacts 26b1 of the plurality of sets of load side fixed contacts 26 b.

The contact support 28 is a component dedicated to the plunger type electromagnet. As shown in fig. 5, the contact support 28 includes a plurality of movable contact support portions 29 that hold a plurality of movable contacts 27 so as to be movable in the front-rear direction, and a pair of coupling portions 30 and 31 that are integrally formed with the movable contact support portions 29 and coupled to the plunger electromagnet 12.

As shown in fig. 5, the pair of coupling portions 30 and 31 are formed so as to be separated from each other in the arrangement direction of the plurality of movable contact supporting portions 29, and coupling insertion portions 32a and 32b having slit shapes extending in a straight line are formed on inner walls facing each other.

As shown in fig. 3, the elastic engagement plate portions 18b, 18c of the coupling spring 18 fixed to the first armature 24 of the plunger type electromagnet 12 are engaged with the coupling insertion portions 32a, 32b of the contact support 28 in an elastically deformed state, so that the plunger type electromagnet 12 and the contact support 28 are coupled integrally.

Here, fig. 6 shows a structure of the second frame 11B in which the contact support 28 is disposed. The square tube portion 52 of the second housing 11B on the side where the power supply side terminal portion 53a and the auxiliary terminal portion 54a are formed is open, and stepped portions 34, 35 are formed at both edge portions of the opening.

Fig. 7 shows an enlarged view of the circle indicated by reference symbol a in fig. 3, and the stepped portions 34 and 35 formed in the second frame 11B are arranged so as to overlap the front flange portion 19 of the plunger electromagnet 12 in the front-rear direction by a dimension L. The dimension L is set to be smaller than the contact gap G between the fixed contact 26a1 and the movable contact 27a (the contact gap G between the fixed contact 26b1 and the movable contact 27 b) shown in fig. 3 (L < G).

Fig. 8 is a view showing the electromagnetic contactor 10 from above, and the stepped portions 34 and 35 are arranged so as to overlap the first housing 11A constituting the housing together with the second housing 11B from inside, and have a function of preventing refuse from entering the inside of the electromagnetic contactor 10 from above.

Next, an assembly procedure of the electromagnetic contactor 10 according to the first embodiment will be described with reference to fig. 1, 3, 9, and 10.

First, the electromagnetic contactor 10 is assembled in a state where the contact mechanism 13 is formed. That is, the contact mechanism 13 is used in which a plurality of sets of the power source side fixed contact 26a and the load side fixed contact 26B, a plurality of movable contacts 27, and the contact support 28 are assembled inside the second housing 11B.

Next, as shown in fig. 9, the second frame 11B is moved upward with respect to the contact support 28, and the fixed contact 26a1 and the movable contact 27a (the fixed contact 26B1 and the movable contact 27B) of the contact mechanism 13 are brought into contact with each other, so that the contact gap G is kept in a state where it is not present (the contact gap G becomes zero). The state in which the contact gap G exists between the fixed contact 26a1 and the movable contact 27a (the fixed contact 26b1 and the movable contact 27 b) of the contact mechanism 13 corresponds to the first assembly step described in the present invention, and the state shown in fig. 9 corresponds to the disturbance prevention step described in the present invention.

Next, as shown in fig. 10, the openings of the coupling insertion portions 32a, 32b of the contact support 28 provided in the contact mechanism 13 are made to face the coupling spring 18 on the first armature 24. Then, the contact mechanism 13 is slid in a direction perpendicular to the connecting direction of the contact mechanism 13 and the plunger type electromagnet 12 on the upper portion of the plunger type electromagnet 12. At this time, since the fixed contact 26a1 and the movable contact 27a (the fixed contact 26B1 and the movable contact 27B) of the contact mechanism 13 are held in a state where the contact gap G does not exist, the step portions 34, 35 formed in the second frame 11B are located at the upper part of fig. 10 with respect to the front flange portion 19 of the plunger electromagnet 12, and therefore the contact mechanism 13 is slidingly moved without interfering with the front flange portion 19. Thus, the pair of elastic engagement plate portions 18b, 18c of the coupling spring 18 are engaged with the inside of the coupling insertion portions 32a, 32b. The state shown in fig. 10 corresponds to the second assembly step described in the present invention.

Next, as shown in fig. 11, the contact mechanism 13 is further slid to the left, whereby the pair of elastic engagement plate portions 18b, 18c of the coupling spring 18 are engaged with the coupling insertion portions 32a, 32b. At this time, the step portions 34, 35 of the second frame 11B move to positions not interfering with the front flange portion 19, and therefore the second frame 11B is moved toward the plunger electromagnet 12 side. By performing the operation of the second frame 11B, as shown in fig. 3, the contact mechanism 13 having the contact gap G between the fixed contact 26a1 and the movable contact 27a (the fixed contact 26B1 and the movable contact 27B) is configured, and the contact support 28 of the contact mechanism 13 is connected to the plunger electromagnet 12. The stepped portions 34 and 35 of the second frame 11B are arranged so as to overlap the front flange portion 19 of the plunger electromagnet 12 in the front-rear direction. The state shown in fig. 11 corresponds to the release step described in the present invention.

Then, the first frame 11A in which the plunger electromagnet 12 is mounted is coupled to the second frame 11B of the contact mechanism 13, thereby completing the assembly of the electromagnetic contactor 10 shown in fig. 1. The operation of connecting the first frame 11A to the second frame 11B of the contact mechanism 13 corresponds to the third assembly step described in the present invention.

Next, an electromagnetic contactor 60 according to a second embodiment of the present invention will be described with reference to fig. 12 to 14.

Fig. 12 shows an internal structure of an electromagnetic contactor 60 according to a second embodiment, which includes a contact mechanism 62 incorporated in a second frame 61B, and a column electromagnet 63 incorporated in a first frame (not shown) connected to the second frame 61B in the front-rear direction, and which drives the contact mechanism 62 on/off to operate the electromagnet.

The column electromagnet 63 includes: a fixed core 64; a movable core 65 having its armature surface 65a disposed opposite to the armature surface 64a of the fixed core 64; an electromagnetic coil 66 wound around the central protruding portion of the fixed core 64; and a return spring 67. The movable core 65 is formed with a through hole 65b penetrating in the left-right direction (thickness direction) of fig. 12.

The contact mechanism 62 includes: a plurality of sets of power-side fixed contacts 68a and load-side fixed contacts 68b fixed to the second frame 61b and arranged in the left-right direction; a contact support 69 dedicated to the column electromagnet and movably mounted in the inside of the second frame 61B in the front-rear direction; and a plurality of movable contacts 70 supported by the contact support 69 and movable in the front-rear direction so that the movable contacts 70a, 70b can contact and separate from the fixed contacts 68a1 of the plurality of sets of power source side fixed contacts 68a and the fixed contacts 68b1 of the plurality of sets of load side fixed contacts 68 b.

As shown in fig. 13, the contact support 69 dedicated to the column electromagnet includes a plurality of movable contact support portions 71 that hold the plurality of movable contacts 27 so as to be movable in the front-rear direction, and a pair of coupling portions 72, 73 that are formed integrally with the movable contact support portions 71 and are opposed to each other to couple with the column electromagnet 63. A movable core contact surface 74 is formed between the pair of connecting portions 72 and 73, and connecting insertion portions 75a and 75b having slit shapes extending linearly are formed on the inner walls of the pair of connecting portions 72 and 73 facing each other. The contact support 69 dedicated for the column electromagnet is mounted inside the second frame 61B in the same manner as the contact support 28 dedicated for the plunger electromagnet shown in the first embodiment, and the fixed contacts 68a1 and 68B1 of the plurality of sets of power source side fixed contacts 68a and load side fixed contacts 68B fixed to the second frame 61B are brought into contact with and separated from the movable contacts 70a and 70B of the plurality of sets of movable contacts 70 supported by the contact support 69 by the movement of the contact support 69.

As shown in fig. 14, the plunger electromagnet 63 is configured such that the core upper surface 65b of the movable core 65 is brought into contact with the movable core contact surface 74 of the contact support 69, the tip end portion of the coupling spring 76 inserted into the through hole 65b of the movable core 65 is inserted into the coupling insertion portions 75a and 75b, and the movable core 65 is pressed against the movable core contact surface 74 by the elastic force of the coupling spring 76. Thus, the column electromagnet 63 and the contact support 69 are integrally connected, and the electromagnetic contactor 60 according to the second embodiment can be configured.

Next, an assembly procedure of the electromagnetic contactor 60 of the second embodiment will be described.

First, a state is established in which a plurality of sets of power source side fixed contacts 68a and load side fixed contacts 68B and a contact support 69 are assembled inside the second frame 61B, that is, a contact mechanism 62 dedicated to the column electromagnet is formed.

Next, the second frame 61B is moved relative to the contact support 69 so that the fixed contacts 68a1 and 68B1 of the contact mechanism 62 are brought into contact with the movable contacts 70a and 70B of the movable contact 70 supported by the contact support 69, and a contact gap is not present (corresponding to the first assembly step described in the present invention).

Next, the openings of the coupling insertion portions 75a and 75b provided in the contact support 69 are opposed to the coupling springs 76 inserted into the through holes 65b of the movable core 65, and the contact mechanism 62 is slid with respect to the plunger electromagnet 63 in a direction orthogonal to the coupling direction of the plunger electromagnet 63 (corresponding to the second assembling step described in the present invention).

Then, by further sliding movement of the contact mechanism 62, engagement between the distal end portion of the coupling spring 76 and the coupling insertion portions 75a and 75b is completed.

Then, the electromagnetic contactor 60 according to the second embodiment is assembled by connecting a first frame (not shown) to a second frame 61B so as to house a column electromagnet 63 (corresponding to the third assembly step described in the present invention).

Next, the effects of the electromagnetic contactor 10 using the plunger type electromagnet 12 as the operation electromagnet shown in the first embodiment and the electromagnetic contactor 60 using the column type electromagnet 63 as the operation electromagnet shown in the second embodiment will be described.

In the method of assembling the electromagnetic contactor 10 using the plunger electromagnet 12 as the operation electromagnet, first, as shown in fig. 9, a plunger electromagnet unit is formed by assembling a contact support 28 dedicated to the plunger electromagnet inside the second housing 11B. In the method of assembling the electromagnetic contactor 60 using the column electromagnet 63 as the operating electromagnet, first, the contact support 69 dedicated to the column electromagnet is assembled inside the second frame 61B to form a unit for the column electromagnet. Then, in the assembly line of the electromagnetic contactor 10, as a first assembly step, the coupling insertion portions 32a, 32b of the plunger-type electromagnet unit are coupled to the coupling spring 18 of the plunger-type electromagnet 12 (see fig. 11). In the assembly line of the electromagnetic contactor 60, as a first assembly step, the coupling insertion portions 75a and 75b of the plunger electromagnet unit are coupled to the coupling spring 76 engaged with the movable core 65 of the plunger electromagnet 63.

In this way, when the electromagnetic contactor is manufactured using one of the plunger electromagnet 12 and the column electromagnet 63 as the operation electromagnet, the step of connecting the connecting spring 18 of the plunger electromagnet 12 to the connecting insertion portions 32a and 32b of the plunger electromagnet unit or the step of connecting the connecting spring 76 of the column electromagnet 63 to the connecting insertion portions 75a and 75b of the column electromagnet unit can be shared as the initial assembly step, and therefore, compared with the conventional assembly line of the electromagnetic contactor in which a series of steps of the electromagnetic contactor are performed by different assembly lines when the plunger electromagnet 12 and the column electromagnet 63 are used as the operation electromagnet, the assembly line of a short size can be formed in which the number of assembly steps is reduced. Further, by constructing an assembly line of a short size to reduce the investment in assembly equipment, it is possible to achieve a reduction in manufacturing cost when manufacturing an electromagnetic contactor using one of the plunger electromagnet 12 and the column electromagnet 63.

In addition, when one of the plunger electromagnet unit and the column electromagnet unit is connected to one of the plunger electromagnet 12 and the column electromagnet 63, only one of the connection insertion portions 32a and 32b of the plunger electromagnet unit and the connection insertion portions 75a and 75b of the column electromagnet unit is required to be slid toward one of the connection spring 18 of the plunger electromagnet 12 and the connection spring 76 of the column electromagnet 63, so that the assembly of the electromagnetic contactor can be simplified.

In the electromagnetic contactor 10 using the plunger electromagnet 12 as the operation electromagnet, as shown in fig. 8, the stepped portions 34 and 35 of the second housing 11B are arranged in a state of overlapping the first housing 11A from the inside, and there is no space to the inside in the upper walls of the first housing 11A and the second housing 11B of the electromagnetic contactor 10, so that it is possible to prevent refuse from entering the inside of the electromagnetic contactor 10 from above. The electromagnetic contactor 60 using the column electromagnet 63 as the operation electromagnet is not described in detail, but the stepped portions 34 and 35 provided in the second frame 11B are arranged so as to overlap the first frame 11A from the inside, whereby it is possible to prevent dust from entering the inside of the electromagnetic contactor 10 from above.

Description of the reference numerals

10 electromagnetic contactor

11A first frame (lower frame)

11B second frame (Upper frame)

12. Plunger type electromagnetic

13. Contact mechanism

14. Winding frame

15. Plunger piston

16. Outer yoke

17. Cylindrical portion

18. Connecting spring

18a fixing plate part

18b, 18c of a pair of resilient snap plate portions

19 front flange (flange)

20. Rear flange part

21. Exciting coil

22. Coil terminal

24. First armature

25. Second armature

26a power supply side fixed contact

26a1 fixed contact

26b load side fixed contact

26b1 fixed contact

28 contact support (for plunger type electromagnet)

27 movable contact

27a, 27b movable contact

29. Movable contact support

30. 31 connecting portion

32a, 32b connecting the insertion portion

34. 35 step part

50. Square tubular part with bottom

51. Mounting plate part

52. Square tube part

53a power supply side terminal portion

53b load side terminal portion

54a auxiliary terminal portion

54b auxiliary terminal portion

60. Electromagnetic contactor

61B second frame (upper frame)

62. Contact mechanism

63. Column type electromagnet

64. Fixed iron core

64a armature face

65. Movable iron core

65a armature face

65b through hole

65c core upper surface

66. Electromagnetic coil

67. Reset spring

68a power supply side fixed contact

68b load side fixed contact

69 contact support (for column electromagnet)

68a1 fixed contact

68b1 fixed contact

70a, 70b movable contact

70. Movable contact

71. Movable contact support

72. 73 connection part

74. Contact surface of movable iron core

75a, 75b connecting the insertion portion

76. Connecting spring

G contact gap.

Claims (9)

1. An electromagnetic contactor, comprising:

a lower frame and an upper frame forming a shell divided up and down;

a contact mechanism, comprising: a movable contact having a pair of movable contacts, a pair of fixed contacts having fixed contacts capable of contacting and separating with the pair of movable contacts, and a contact support for supporting the movable contacts, the movable contacts being disposed inside the upper frame; and

an electromagnet for operation, which is disposed in the lower frame and drives the contact mechanism on/off via the contact support member,

the contact support and the electromagnet can be slidably moved in a direction intersecting with a driving direction of the electromagnet to connect the contact support and the electromagnet,

in the electromagnetic contactor described above, the magnetic circuit board,

the contact support is slidably moved in a state where the contact support is integrally assembled to the upper frame, and the contact support is coupled to the electromagnet.

2. The electromagnetic contactor as claimed in claim 1, wherein:

the contact support includes a coupling insertion portion which is opened at one end in a direction intersecting a coupling direction coupling the electromagnets and extends in the intersecting direction,

the electromagnet comprises a connecting spring connected with the contact mechanism,

the coupling insertion portion of the contact support is slidably moved toward the coupling spring of the electromagnet to couple the contact support and the electromagnet.

3. The electromagnetic contactor according to claim 1 or 2, wherein:

the electromagnet includes a spool having a cylindrical portion for winding an exciting coil and a flange portion protruding from an end portion of the cylindrical portion toward the contact mechanism side, and the upper frame has a stepped portion protruding in a smaller dimension than a contact gap between the movable contact and the fixed contact on the electromagnet side, and when the contact gap is opened, the flange portion protruding toward the contact mechanism side and a wall surface of the stepped portion face each other.

4. The electromagnetic contactor according to any one of claims 1 to 3, wherein:

the contact support is slidingly moved toward the electromagnet while the upper frame of the contact mechanism and the contact support are held in a state where the contact gap is zero.

5. The electromagnetic contactor according to any one of claims 2 to 4, wherein:

the electromagnet is a plunger type electromagnet having a plunger movable up and down and an armature protruding outward from an end of the plunger, and the coupling spring is provided on the armature.

6. The electromagnetic contactor according to any one of claims 2 to 4, wherein:

the electromagnet is a plunger type electromagnet having a movable core that can move up and down, and the connecting spring is provided on the movable core.

7. A method of assembling an electromagnetic contactor, wherein the electromagnetic contactor is the electromagnetic contactor according to any one of claims 1 to 6, the method of assembling an electromagnetic contactor characterized by comprising:

a first assembling step of assembling the upper frame and the contact support of the contact mechanism into one body;

a second assembling step of slidably inserting the contact support held together with the upper frame to the electromagnet; and

and a third assembling step of engaging the upper edge of the lower frame with the lower edge of the upper frame to form the housing.

8. The method of assembling an electromagnetic contactor as claimed in claim 7, wherein:

an interference prevention step of relatively moving the contact support held together with the upper frame so that the fixed contact contacts the movable contact and the contact gap becomes zero is provided between the first assembly step and the second assembly step,

and a release step of moving the upper frame toward the electromagnet to form a predetermined contact gap between the fixed contact and the movable contact when the connection between the contact support and the electromagnet is completed is provided between the second assembly step and the third assembly step.

9. The assembling method of an electromagnetic contactor according to claim 7 or 8, wherein:

the first assembling step is shared in an assembling line including an electromagnetic contactor that uses a plunger electromagnet as an electromagnet for operation and an electromagnetic contactor that uses a column electromagnet as an electromagnet for operation.