A single-pole modular contactor

Abstract

The present invention relates to a single-pole modular contactor, comprising a housing and an electromagnetic system, a contact system, a coil terminal assembly arranged on both sides of the electromagnetic system and electrically connected to the electromagnetic system, and a main terminal assembly arranged on both sides of the contact system and electrically connected to the contact system. The housing comprises a first side cover and a second side cover spliced ​​to each other, a first connection cavity for placing the coil terminal assembly and a second connection cavity for placing the main terminal assembly are formed between the first side cover and the second side cover, a partition wall is formed between the first connection cavity and the second connection cavity, and the adjacent first connection cavity and the second connection cavity are staggered, the lower ends of the two side surfaces of the housing form main connection holes, the two side surfaces of the first side cover both form inward notches, and the notches form coil connection holes connected to the first connection cavity. The single-pole modular contactor of the present invention has the advantages of small size, reasonable arrangement of internal components, large rated current, and is also easy to install.

Description

Technical Field

[0001] The invention relates to a contactor, in particular to a single-pole modular contactor. Background Art

[0002] The working method of the contactor is to energize the coil of the contactor. The coil is energized to generate a magnetic field. The magnetic field causes the static iron core and the moving iron core to generate magnetic force and attract each other, closing the normally open contacts to control the conduction of the load. When the coil loses power, the magnetic force between the static iron core and the moving iron core disappears, and the moving iron core is reset under the action of the spring, and the normally open contacts are disconnected.

[0003] Contactors usually have rated currents of 16A, 20A, 25A, 40A, and 63A. The factors that determine the rated current of the contactor include the contact capacity of the moving and static contacts (the long-term working current that the contacts can withstand), the specifications of the main terminals (the long-term working current that the main terminals can withstand), and the requirements for the electrical gap between the conductive parts inside the contactor. Due to the requirements of the contact capacity of the moving and static contacts and the specifications of the main terminals, in the limited space of the shell structure of the single-pole modular contactor (the contactor with 1 pole of the main terminal), only the rated current of 16A, 20A, and 25A can be achieved, and a larger rated current cannot be achieved. Such a defect makes it necessary to install a multi-pole contactor with a larger rated current or a larger single-pole contactor to adapt to the application where only a contactor with 1 pole of the main terminal is required and the rated current is large, which will cause technical problems such as waste of resources or occupying a large installation space. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a single-pole modular contactor with reasonable and reliable structural design, convenient assembly, small overall size and large rated current. It can be used in occasions with rated currents of 40A and 63A to meet the actual needs of customers.

[0005] In order to achieve the above objectives, the present invention adopts such a single-pole modular contactor, including a shell and an electromagnetic system arranged in the shell, a contact system arranged in the shell, a coil terminal assembly arranged on both sides of the electromagnetic system and electrically connected to the electromagnetic system, and a main terminal assembly arranged on both sides of the contact system and electrically connected to the contact system. The shell includes a first side cover and a second side cover spliced ​​to each other, a first connecting cavity for placing the coil terminal assembly and a second connecting cavity for placing the main terminal assembly are formed between the first side cover and the second side cover, a partition wall is formed between the first connecting cavity and the second connecting cavity, and the adjacent first connecting cavity and the second connecting cavity are staggered, the lower ends of the two side surfaces of the shell form main wiring holes, and the two side surfaces of the first side cover both form recesses inwardly, and the recess forms a coil wiring hole connected to the first connecting cavity.

[0006] In order to achieve a high-current single-pole contactor in a shell with limited space, the above-mentioned single-pole modular contactor must ensure that the main terminal assembly is of large current specification (can work normally at rated currents of 40A and 63A). Due to the requirements of modular shell height, width and electrical clearance between conductive parts, the coil terminal cannot be conventionally set above the main terminal. Therefore, the first connecting cavity and the second connecting cavity are staggered in the position of the wiring axis, and the coil terminal is offset to one side relative to the center axis of the shell. Similarly, the coil wiring hole is also offset relative to the center axis of the shell, and the coil wiring hole is set relatively to the inside of the main wiring hole, so that the coil terminal can still be assembled in the shell under the restriction of large-size main terminals and shell height, and the partition wall can ensure electrical isolation between adjacent coil terminals and main terminals. The single-pole modular contactor of the present invention adjusts the positions of the main wiring terminals and the coil wiring terminals in the housing, staggers the main wiring terminals and the coil wiring terminals, and separates the first connection cavity and the second connection cavity. The single-pole modular contactor can be used in the case of a rated current of 40A or 63A in the modular housing. Such a single-pole modular contactor has the advantages of small size, reasonable arrangement of internal components, and large rated current, does not cause waste of resources, and is easy to install.

[0007] The present invention is further configured such that the first connecting cavity is arranged on a side close to the first side cover, and the second connecting cavity is arranged on a side close to the second side cover.

[0008] The present invention is further configured such that the electromagnetic system includes a coil frame, a coil wound on the coil frame, a static iron core, a moving iron core, and an indicator connected to the coil frame, wherein a reset spring is arranged on the indicator, and a side mounting hole is formed on the second side cover at a position opposite to the reset spring.

[0009] The above-mentioned contactor housing is spliced ​​by a first side cover and a second side cover, and the first connecting cavity for installing the coil terminal assembly is arranged with the same cross-section as the reset spring. Such a structure is not easy to install directly when assembling the reset spring, so a side mounting hole is opened on the second side cover. After the internal electromagnetic system is installed and the first side cover and the second side cover are closed, the reset spring is connected from the side mounting hole to complete the assembly.

[0010] The present invention is further configured such that a spring groove corresponding to the side mounting hole is formed on the second side cover, a convex column is formed on the indicator, one end of the reset spring is connected to the convex column of the indicator, and the other end of the reset spring is connected to the spring groove.

[0011] The convex column of the indicator and the spring groove on the second side cover are both for improving the stability of the connection and cooperation between the return spring and the indicator.

[0012] The present invention is further configured such that the coil terminal assembly includes a first coil terminal and a second coil terminal, the first coil terminal being connected to a first terminal pin, one end of the first terminal pin forming a downwardly bent inclined portion, a position on the second side cover opposite to the inclined portion forming an inclined groove adapted to the inclined portion, the inclined portion being connected in the inclined groove, the second coil terminal being connected to a second terminal pin, one end of the second terminal pin forming a flat portion, a position on the second side cover opposite to the flat portion forming a support platform, and the flat portion being connected to the support platform.

[0013] The inclined portion of the first connecting pin is clamped in the inclined groove of the second side cover. Due to the cooperation between the inclined portion and the inclined groove, the first coil connecting terminal and the first connecting pin will not be offset when the first coil connecting terminal is operated for wiring; the flat portion of the second connecting pin is connected to the support platform of the second side cover. Due to the cooperation between the flat portion and the support platform to form a surface, the second coil connecting terminal and the second connecting pin will not be offset when the second coil connecting terminal is operated for wiring, thereby improving the stability of the connection of the coil connecting terminal assembly in the shell.

[0014] The present invention is further configured such that the electromagnetic system also includes a first elastic connecting piece connected to one end of the coil and a second elastic connecting piece connected to the other end of the coil, one end of the first elastic connecting piece is connected to the side of the first connecting pin, and one end of the second elastic connecting piece is connected to the flat part of the second connecting pin.

[0015] The first elastic connecting piece and the second elastic connecting piece are used to respectively realize the electrical connection between the coil and the first connecting pin and the electrical connection between the second connecting pin, and the elastic pressure of the first elastic connecting piece and the second elastic connecting piece is utilized to ensure reliable electrical connection with the first connecting pin and the second connecting pin.

[0016] The present invention is further configured such that the other end of the first connecting pin extends upward to form a first plug-in portion, and the other end of the second connecting pin extends upward to form a second plug-in portion, and the first side cover forms plug-in slots at positions corresponding to the first plug-in portion and the second plug-in portion, and the first plug-in portion and the second plug-in portion are respectively connected in the plug-in slots.

[0017] The first plug-in portion and the second plug-in portion are respectively connected to the plug-in slot of the first side cover, further limiting the deviation of the first connection pin or the second connection pin, so that the first side cover and the second side cover can fix the first connection pin and the second connection pin.

[0018] The present invention is further configured to form a positioning block and a positioning hole on the first side cover or the second side cover, a positioning column adapted to the positioning hole is formed on the coil skeleton, the coil skeleton is connected and matched with the positioning block, and the positioning column is connected with the positioning hole.

[0019] The positioning structure ensures the stability of the connection between the first side cover and the second side cover of the electromagnetic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of an embodiment of the present invention.

[0021] Figure 2 It is an exploded view from another angle of the embodiment of the present invention.

[0022] Figure 3 2 is a top view of an embodiment of the present invention.

[0023] Figure 4 yes Figure 3 Sectional view of AA.

[0024] Figure 5 It is a three-dimensional diagram of the first side cover of an embodiment of the present invention.

[0025] Figure 6 It is a three-dimensional diagram of the second side cover of an embodiment of the present invention.

[0026] Figure 7 It is a side view of the embodiment of the present invention after the first side cover is removed. DETAILED DESCRIPTION

[0027] The specific structure of the single-pole modular contactor of the present invention is described below in conjunction with the accompanying drawings:

[0028] like Figure 1-7As shown, the present invention is a single-pole modular contactor, comprising a housing 1 and an electromagnetic system 2 arranged in the housing 1, a contact system 3 arranged in the housing 1, a coil terminal assembly 4 arranged on both sides of the electromagnetic system 2 and electrically connected to the electromagnetic system 2, and a main terminal assembly 5 arranged on both sides of the contact system 3 and electrically connected to the contact system 3. The housing 1 comprises a first side cover 11 and a second side cover 12 spliced ​​to each other, a first connecting cavity 13 for placing the coil terminal assembly 4 and a second connecting cavity 14 for placing the main terminal assembly 5 are formed between the first side cover 11 and the second side cover 12, a partition wall 15 is formed between the first connecting cavity 13 and the second connecting cavity 14, and adjacent first connecting cavities 13 and second connecting cavities 14 are staggered, the first connecting cavity 13 is arranged on a side close to the first side cover 11, and the second connecting cavity 14 is arranged on a side close to the second side cover 12, a main wiring hole 16 is formed at the lower ends of the two side surfaces of the housing 1, and both side surfaces of the first side cover 11 are inwardly facing. A notch 17 is formed, and a coil wiring hole 18 communicating with the first connecting cavity 13 is formed on the notch 17. The electromagnetic system 2 includes a coil skeleton 21, a coil 22 wound on the coil skeleton 21, a static iron core 23, a moving iron core 24, and an indicator 25 connected to the coil skeleton 21. A reset spring 26 is arranged on the indicator 25. A side mounting hole 121 is formed on the second side cover 12 at a position facing the reset spring 26. A spring groove 121 corresponding to the side mounting hole 121 is formed on the second side cover 12. 22, a boss 251 is formed on the indicator 25, one end of the reset spring 26 is connected to the boss 251 of the indicator 25, and the other end of the reset spring 26 is connected to the spring groove 122, a positioning block 112 and a positioning hole 113 are formed on the first side cover 11 or the second side cover 12, a positioning column 211 adapted to the positioning hole 113 is formed on the coil skeleton 21, the coil skeleton 21 is connected and matched with the positioning block 112, and the positioning column 211 is connected with the positioning hole 113.

[0029] like Figure 5-7As shown, the coil terminal assembly 4 includes a first coil terminal 41 and a second coil terminal 42, the first coil terminal 41 is connected to a first connection pin 43, one end of the first connection pin 43 forms a downwardly bent inclined portion 431, a position on the second side cover 12 that is opposite to the inclined portion 431 forms an inclined groove 123 adapted to the inclined portion 431, the inclined portion 431 is connected in the inclined groove 123, the second coil terminal 42 is connected to a second connection pin 44, one end of the second connection pin 44 forms a flat portion 441, a position on the second side cover 12 that is opposite to the flat portion 441 forms a support platform 124, the flat portion 441 is connected to the support platform 124, The electromagnetic system 2 also includes a first elastic connecting piece 27 connected to one end of the coil 22 and a second elastic connecting piece 28 connected to the other end of the coil 22, one end of the first elastic connecting piece 27 is connected to the side of the first connecting pin 43, one end of the second elastic connecting piece 28 is connected to the flat portion 441 of the second connecting pin 44, the other end of the first connecting pin 43 extends upward to form a first plug-in portion 432, and the other end of the second connecting pin 44 extends upward to form a second plug-in portion 442, and the first side cover 11 forms a plug-in slot 111 at the positions corresponding to the first plug-in portion 432 and the second plug-in portion 442, and the first plug-in portion 432 and the second plug-in portion 442 are respectively connected in the plug-in slot 111.

[0030] According to the above embodiments, in order to achieve a high-current single-pole contactor in a housing with limited space, the single-pole modular contactor of the present invention must ensure that the main terminal assembly is of large current specification (can work normally at a rated current of 40A and 63A), and the contact system is also a wide-body single-pole moving and static contact. Due to the requirements of the height and width of the modular housing and the electrical gap between the conductive parts, the coil terminal cannot be conventionally arranged above the main terminal. Therefore, the first connecting cavity and the second connecting cavity are staggered in the position of the wiring axis, and the coil terminal is arranged relative to the central axis of the housing ( Figure 3 The BB in the middle is offset to one side, and the coil wiring hole is also offset relative to the center axis of the shell ( Figure 3 The middle BB) is offset and the coil wiring hole is arranged inwardly relative to the main wiring hole, so that the coil wiring terminal can still be assembled in the housing under the restrictions of large-sized main wiring terminals, wide-body moving and static contacts and housing height, and the partition wall can ensure electrical isolation between adjacent coil wiring terminals and main wiring terminals.

[0031] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A single-pole modular contactor, comprising a housing and an electromagnetic system arranged in the housing, a contact system arranged in the housing, a coil terminal assembly arranged on both sides of the electromagnetic system and electrically connected to the electromagnetic system, and a main terminal assembly arranged on both sides of the contact system and electrically connected to the contact system, Features: The shell includes a first side cover and a second side cover spliced ​​to each other, a first connecting cavity for placing a coil terminal assembly and a second connecting cavity for placing a main terminal assembly are formed between the first side cover and the second side cover, a partition wall is formed between the first connecting cavity and the second connecting cavity, and the adjacent first connecting cavity and the second connecting cavity are staggered, a main wiring hole is formed at the lower ends of the two side surfaces of the shell, both side surfaces of the first side cover form recesses inwardly, a coil wiring hole connected to the first connecting cavity is formed on the recess, the first connecting cavity is arranged on a side close to the first side cover, and the second connecting cavity is arranged on a side close to the second side cover.

2. The single-pole modular contactor according to claim 1, Features: The electromagnetic system includes a coil frame, a coil wound on the coil frame, a static iron core, a moving iron core, and an indicator connected to the coil frame. A reset spring is arranged on the indicator, and a side mounting hole is formed on the second side cover at a position opposite to the reset spring.

3. The single-pole modular contactor according to claim 2, Features: A spring groove corresponding to the side mounting hole is formed on the second side cover, a convex column is formed on the indicator, one end of the reset spring is connected to the convex column of the indicator, and the other end of the reset spring is connected to the spring groove.

4. The single-pole modular contactor according to claim 2, Features: The coil terminal assembly includes a first coil terminal and a second coil terminal, the first coil terminal is connected to a first connection pin, one end of the first connection pin forms a downwardly bent inclined portion, a position on the second side cover opposite to the inclined portion forms an inclined groove adapted to the inclined portion, the inclined portion is connected in the inclined groove, the second coil terminal is connected to a second connection pin, one end of the second connection pin forms a flat portion, a position on the second side cover opposite to the flat portion forms a support platform, and the flat portion is connected to the support platform.

5. The single-pole modular contactor according to claim 4, Features: The electromagnetic system also includes a first elastic connecting piece connected to one end of the coil and a second elastic connecting piece connected to the other end of the coil, one end of the first elastic connecting piece is connected to the side of the first connecting pin, and one end of the second elastic connecting piece is connected to the flat part of the second connecting pin.

6. The single-pole modular contactor according to claim 4 or 5, Features: The other end of the first connecting pin extends upward to form a first plug-in portion, and the other end of the second connecting pin extends upward to form a second plug-in portion. The first side cover forms plug-in slots at positions corresponding to the first plug-in portion and the second plug-in portion, and the first plug-in portion and the second plug-in portion are respectively connected in the plug-in slots.

7. The single-pole modular contactor according to claim 3, 4 or 5, Features: A positioning block and a positioning hole are formed on the first side cover or the second side cover, a positioning column adapted to the positioning hole is formed on the coil frame, the coil frame is connected and matched with the positioning block, and the positioning column is connected with the positioning hole.

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