CN116206924A - Auxiliary contact for wide current range application - Google Patents

Abstract

The invention relates to an auxiliary contact applied in a wide current range, which is clamped and fixed with a contactor when in use, and comprises an outer shell, a contact unit assembly, a moving part and a micro switch assembly, wherein the contact unit assembly and the micro switch assembly are respectively provided with at least one group and are symmetrically arranged in the outer shell, the moving part is movably arranged in the outer shell, and when the moving part moves downwards, the moving part drives a contact plate in the contact unit assembly and a swing rod of the micro switch assembly to move and be linked with a switch of the contactor, so that the switching of the contact is realized. The auxiliary contact can meet the requirements of micro switch components for small current application and contact unit components for large current application, and can meet the requirements of action strokes of different contactors through reasonable structural configuration.

Description

Auxiliary contact for wide current range application

Technical Field

The invention relates to the technical field of contactors, in particular to an auxiliary contact for wide-current-range application in a contactor.

Background

Contactors are widely used in the field of electrical equipment, for example in relays, circuit breakers or switch cabinets or in electrical connection with them. The contactor may include a contactor housing, a coil, an electromagnetic mechanism of a stationary core and a movable core (armature), and a contact unit, the basic operation principle of which is to energize the coil to generate an electromagnetic attraction force between the stationary core and the armature, thereby causing the armature to be attracted toward and eventually contact the stationary core against the spring force of a reaction spring, so that the contact unit of the contactor is engaged.

In existing contactors, auxiliary contacts may also be included. For example, main contacts are used to switch the main circuit, auxiliary contacts are used to control the circuit or to act as an electrical interlock, and some auxiliary contacts are built into the contactor housing on the market. However, there are also external auxiliary contacts provided outside the contactor housing, which provides flexibility, replaceability of the auxiliary contacts. The external auxiliary contact mainly comprises a contact unit and an outer shell, and the contact unit consists of silver contacts and a conductive plate. The conventional structure is insufficient in sealing performance and the contacts are easy to vulcanize, so that the product cannot be reliably connected when the product is electrified with smaller current. The small current is in the milliamp level, and the design of different contactor strokes needs to be met.

Thus, there is an industry need to upgrade auxiliary contacts to meet applications in different current ranges, and to have a mechanical life that is no different from existing products, operating frequency, and to meet the action strokes of different contactors.

Disclosure of Invention

The present invention aims to provide an auxiliary contact for wide current range applications, which solves the problems encountered in the background art.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

the utility model provides an auxiliary contact that wide current range was used, auxiliary contact is fixed with the contactor joint when using, including shell body, contact unit subassembly, moving part and micro-gap switch subassembly, contact unit subassembly and micro-gap switch subassembly are equipped with a set of respectively at least, and its symmetry installs the inside of shell body, moving part movable mounting is in the inside of shell body, when moving part moves down, drive contact unit subassembly, micro-gap switch subassembly and the switch linkage of contactor realize the switching of contact.

The outer shell comprises an upper coaming, a lower coaming and a top plate, wherein the top plate is arranged at the top of the upper coaming, the upper coaming is connected with the lower coaming through a buckle, a fixed assembly connected with a contactor is arranged at the bottom of the lower coaming, and a through hole for the moving part to penetrate is formed in the middle of the bottom of the lower coaming; in addition, be equipped with in the top board and be used for installing the location structure of micro-gap switch subassembly, mainly be used for the location micro-gap switch.

As a preferable scheme, the fixing component comprises a hook and a hook, wherein the hook is fixed on two sides of the bottom of the lower coaming, the hook is fixed on the outer side in the middle of the bottom of the lower coaming, and the outer shell is inserted into the contactor through the hook and is clamped with the contactor through the hook.

The moving part comprises a supporting rod, a fixing frame and a pull rod, wherein plugs are vertically fixed on two sides of the bottom of the supporting rod, the fixing frame is arranged in the middle of the bottom of the supporting rod, the bottom of the fixing frame is vertically fixed with the pull rod respectively, and the pull rod is clamped with the contactor; the inside of the fixed frame is provided with a locating plate.

As a preferable scheme, the end part of the plug is of a smooth semicircular structure; the inside of the fixed frame is horizontally fixed with a pressing plate, and the positioning plate is provided with two plates and is of a splayed structure and is symmetrically arranged by taking the pressing plate as a center; the end part of the pull rod is provided with a clamping groove which is clamped with the contactor.

As a preferable scheme, the contact unit assembly comprises two first conductive plates and one contact plate, wherein the first conductive plates are of U-shaped structures, the first conductive plates are clamped with the outer shell, one ends of the first conductive plates are provided with fixing screws, and the other ends of the first conductive plates are connected with the contact plate through silver contacts; the middle part of the contact plate is provided with a chute, and the locating plate positioned at the lower side is positioned in the chute and is in sliding connection with the chute.

As a preferable scheme, the micro-switch assembly comprises a second conductive plate, a micro-switch and a third conductive plate, wherein the second conductive plate and the third conductive plate are of U-shaped structures, the second conductive plate and the third conductive plate are respectively clamped with the outer shell, one ends of the second conductive plate and the third conductive plate are provided with fixing screws, the other ends of the second conductive plate are connected with a lower contact piece of the micro-switch through a first wire, the other ends of the third conductive plate are connected with an upper contact piece of the micro-switch through a second wire, the outer side of the micro-switch is rotationally connected with a swinging rod through a rotating shaft, and the inner side of the swinging rod is provided with a reset spring which is elastically connected with the micro-switch; the end of the plug is abutted against the outer side of the swing rod.

Compared with the prior art, the invention has the beneficial effects that: the auxiliary contact applied in a wide current range can meet the requirements of a micro switch component applied in a small current and a contact unit component applied in a large current, and through reasonable structural configuration, the auxiliary contact can meet the requirements of strokes of different contactors without increasing the overall dimension of the product, has a wider range, and can completely avoid the influence of the strokes of the contactors when only the micro switch is used for small current, and the frequent operation performance of the product can be met. Meanwhile, the contact combination type of the design is flexible.

Drawings

The disclosure of the present invention is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

FIG. 1 is a schematic view of the overall external structure of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 at another view angle;

FIG. 3 is a schematic view of the structure of the contact unit assembly of the present invention;

FIG. 4 is a schematic diagram of a micro-switch assembly according to the present invention;

FIG. 5 is a schematic view of the structure of the moving part of the present invention;

FIG. 6 is a schematic view of the structure of the present invention with the outer housing removed;

FIG. 7 is a schematic view of the structure of FIG. 6 at another view angle;

FIG. 8 is a schematic view of the structure of the upper shroud plate of the present invention;

fig. 9 is a schematic view of the structure of fig. 8 at another view angle.

Reference numerals in the drawings: 1-an outer shell; 11-upper coaming; 12-lower coaming; 13-top plate; 14-hooking; 15-clamping hooks; 16-a buckle; 17-a first positioning block; 18-a second positioning block; 2-contact unit assembly; 21-a first conductive plate; 22-contact plates; 3-moving parts; 31-supporting rods; 32-plug; 33-fixing the frame; 34-positioning plates; 35-pressing plates; 36-pull rod; 37-clamping groove; a 4-microswitch assembly; 41-a first conductive plate; 42-a first wire; 43-micro switch; 44-a third conductive plate; 45-second wires; 46-swinging rod; 47-return spring; 48-rotating shaft.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand, the present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures to which the invention pertains.

According to the technical scheme of the invention, a person skilled in the art can propose various alternative structural modes and implementation modes without changing the true spirit of the invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and examples.

As shown in fig. 1-7, an auxiliary contact for wide current range applications, which is in use snap-fit with a contactor, comprises an outer housing 1, a contact unit assembly 2, a moving part 3 and a microswitch assembly 4. The contact unit assembly 2 and the micro switch assembly 4 are respectively provided with at least one group, and are symmetrically arranged in the outer shell 1, and are mainly arranged on the left side and the right side of the outer shell 1. The contact unit assembly 2 and the micro switch assembly 4 may be respectively installed in two groups, both of which are installed at both sides of the outer case 1, according to necessity. The moving part 3 is movably installed inside the outer case 1, mainly in the up-down direction. When the moving part 3 moves downwards, the contact unit component 2 and the micro switch component 4 are driven to be linked with a switch of the contactor, and the contact unit component 2 and the micro switch component 4 are driven to be opened and closed by the action of the contactor.

Specifically, when the moving part 3 moves downwards, the contact plate 22 in the contact unit assembly and the swing rod 46 of the micro switch assembly are driven to move, so that contact switching is realized. The inside of the outer shell 1 is provided with corresponding mounting slots, which brings convenience to the mounting of the contact unit assembly 2, the moving part 3 and the micro switch assembly 4, and ensures that the moving part 3 has a space for up-and-down movement.

Referring specifically to fig. 1, the outer case 1 includes an upper surrounding plate 11, a lower surrounding plate 12, and a top plate 13, the top plate 13 is mounted on top of the upper surrounding plate 11, is fixed to the upper surrounding plate 11 by fixing screws, and is electrically connected to the contact unit assembly 2 or the micro switch assembly 4 by fixing screws when conducting electrical connection. The upper coaming 11 is connected with the lower coaming 12 through the buckle 16, and the assembly mode of the upper coaming and the lower coaming is convenient, so that the contact unit assembly 2, the moving part 3 and the micro switch assembly 4 can be well and tightly fixed inside. The bottom of the lower coaming 12 is provided with a securing assembly connected to the contactor by which it is secured to the contactor. A through hole for the moving member 3 to pass through is formed in the middle of the bottom of the lower coaming 12, and the moving member 3 is clamped with the switch member of the contactor through the through hole.

In addition, as a preferable solution, a positioning structure for mounting the micro switch assembly 4 is provided in the top board 11, mainly for positioning the micro switch 43. In the installation positioning groove of the micro switch 43, a first positioning block 17 is arranged on one side of the inside of the upper coaming 11, a second positioning block 18 is arranged on the other side of the inside of the upper coaming, the first positioning block 17 and the second positioning block 18 are arranged in a staggered manner, and a positioning structure for positioning the micro switch 43 is formed through the first positioning block 17 and the second positioning block 18. The first positioning block 17 and the second positioning block 18 can position the micro switch 43 and facilitate the manufacture of the mold, and because the first positioning block 17 and the second positioning block 18 are arranged in a staggered manner, the product can be manufactured by adopting one mold for injection molding, if the first positioning block 17 and the second positioning block 18 are arranged together in parallel, the injection molding of the mold is inconvenient, and a plurality of molds are needed to manufacture one by one according to the procedure. The first positioning block 17 and the second positioning block 18 both adopt a round bump mode to position the micro switch 43, so that the vibration force of the micro switch assembly 4 during the switching action is reduced.

As a preferred solution, referring to fig. 2, the fixing component located at the bottom of the lower surrounding plate 12 includes hooks 14 and hooks 15, the hooks 14 are fixed on two sides of the bottom of the lower surrounding plate 12, the hooks 15 are fixed on the middle and outer side of the bottom of the lower surrounding plate 12, and the outer shell 1 is inserted into the contactor through the hooks 14 and is clamped with the switch of the contactor through the hooks 15. The hook 14 and the hook 15 are part of the lower coaming 12 in an integrated structure when in implementation, when the contactor is connected, the hook 14 and the contactor are inserted together in a pushing mode, then the hook 15 is clamped and fixed with the switch connecting part of the contactor through elastic resilience of the hook 15, and the moving part 3 is also locked and fixed with the switch action part of the contactor after the hook and the hook are fixed.

In the above scheme, referring to fig. 5, the moving part 3 includes a supporting rod 31, a fixing frame 33 and a pull rod 36, wherein plugs 32 are vertically fixed on two sides of the bottom of the supporting rod 31, the plugs 32 are arranged outwards and used for avoiding an installed micro switch 43, and can be inserted into a swing arm switch of the micro switch 43 when downward. The bottom middle of bracing piece 31 is equipped with fixed frame 33, and fixed frame 33's bottom is fixed with pull rod 36 is vertical respectively, and pull rod 36 and contactor joint. Since there are two contact unit assemblies 2 on the left and right, the fixing frame 33 is provided with two, and the inside of the fixing frame 33 is provided with a positioning plate 34 for pressing down contacts for switching.

As a preferred solution, the end of the plug 32 has a smooth semicircular structure to facilitate flexible contact, and does not cause damage to the switch in the micro switch 43 when moving up and down, and ensures a good elastic contact area. The fixed frame 33 is internally and horizontally fixed with a pressing plate 35, and the positioning plate 34 is provided with two plates and is of a splayed structure, and is symmetrically arranged by taking the pressing plate 35 as a center and used for moving downwards integrally after being pressed step by step. The end of the pull rod 36 is provided with a clamping groove 37 which is clamped with the contactor and is used for clamping, locking and fixing.

In the above-mentioned scheme, as a preferred scheme, referring to fig. 3, 6 and 7, the contact unit assembly 2 includes two first conductive plates 21 and one contact plate 22, the first conductive plates 21 are in a U-shaped structure, the two first conductive plates 21 are clamped with the outer housing 1, one ends of the two first conductive plates 21 are provided with fixing screws, and are locked by the fixing screws to conduct electricity, and the other ends of the two first conductive plates 21 are connected with two ends of the contact plate 22 by silver contact connectors. A chute is provided in the middle of the contact plate 22, and a positioning plate 34 located at the lower side is located in the chute and is slidably connected with the chute.

Further, when the contactor is started, the moving part 3 moves downwards, the positioning plate 34 is along the chute, and finally the pressing plate 35 drives the whole contact plate 22 to be separated from the first conductive plate 21, so that the contact plate is normally open. When the contactor is opened, the movable part 3 moves upwards, the positioning plate 34 drives the whole contact plate 22 to be closed with the first conductive plate 21 along the chute away from the pressing plate 35, and the contact plate is normally closed. The connection of the two first conductive plates 21 to the contact plate 22 may consist of 2 NC contacts, or 2 NO contacts, or 1 NC contact and 1 NO contact.

In practice, the contact plate 22 may be provided on the upper portion of the pressing plate 35, and the contact plate 22 and the first conductive plate 21 may be energized only by pushing up, which is exactly opposite to the result of the contact plate 22 provided on the lower portion of the pressing plate 35.

In the above-mentioned scheme, as a preferred scheme, referring to fig. 4, 6 and 7, the micro-switch assembly 4 includes a second conductive plate 41, a micro-switch 43 and a third conductive plate 44, where the second conductive plate 41 and the third conductive plate 44 are all in a U-shaped structure, and one ends of the second conductive plate 41 and the third conductive plate 44 are respectively connected with the outer casing 1 through fixing screws, and are energized through screw locking wires. The other end of the second conductive plate 41 is connected with the lower contact of the micro switch 43 through a first wire 42, and the other end of the third conductive plate 44 is connected with the upper contact of the micro switch 43 through a second wire 45 to form positive and negative connection. The outside of the micro switch 43 is rotatably connected with a swing rod 46 through a rotating shaft 48, and the inside of the swing rod 46 is provided with a reset spring 47 which is elastically connected with the micro switch 43. In operation, the return spring 47 is positioned in a mounting groove formed in the microswitch 43, and the outer end of the return spring 47 abuts against the inner side of the swing link 46 to have a certain resilience force. The end of the plug 32 abuts against the outer side of the swing link 46, so that the swing link 46 can be conveniently rotated in a pressing manner, and the micro switch 43 can be opened or closed.

Further, when the contactor is started, the plug 32 presses the swing rod 46 to drive the whole micro switch 43 to switch states when the moving part 3 moves downwards. When the contact is opened, the plug 32 no longer presses the rocker 46, but switches state away from the entire microswitch 43 when the moving part 3 moves upward.

In the invention, the auxiliary contact is fixed with the contactor through the bottom of the outer shell 1, and the moving part 3 is driven to move together when the contactor is switched on and off, so that the contact is driven to be opened. The moving part 3 has a protruding plug 32, the plug 32 is not contacted with the swing rod 46 of the micro switch 43 in a free state, when the moving part 3 moves downwards for a certain distance, the plug 32 is contacted with the swing rod 46 and drives the swing rod 46 to rotate, the movement is continued, the swing rod 46 of the micro switch 43 is tangential to the plug 32, the swing rod 46 compresses the switch contact of the micro switch 43 to enable the micro switch 43 to switch the state, and the movement part 3 continues to move downwards after that without affecting the subsequent state. When the switch of the contactor is released, the action process is opposite, namely the plug 32 is separated from the swing rod 46 after gradually lifting upwards. The contact unit assembly 2 also has conventional compression contact properties, i.e. the whole contact plate 22 is driven to be separated from the first conductive plate 21 by the positioning plate 34 compressing the sliding groove, so that the contact is de-energized.

In addition, the combination is of a modularized design, and can be made into different contact combination forms according to different customer demands, for example, the micro switch assembly 4 can be not connected in implementation, namely, the positive and negative poles are connected with the contact unit assembly 2; the micro switch component 4 with the positive and negative poles only used for small current application can be obtained without connecting the positive and negative pole contact unit component 2; the contact unit component 2 and the micro switch component 4 can be connected by leads, so that the micro switch component is applicable to two currents with different magnitudes and is used for meeting the action strokes of different contactors. Therefore, the wide current range requirements of most customers can be met without adding a die.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. These undisclosed elements are all of the prior art known to those skilled in the art.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (8)

1. An auxiliary contact applied in a wide current range, which is clamped and fixed with a contactor when in use, and is characterized in that: including shell body (1), contact unit subassembly (2), moving part (3) and micro-gap switch subassembly (4), contact unit subassembly (2) and micro-gap switch subassembly (4) are equipped with a set of respectively at least, and its symmetry is installed the inside of shell body (1), moving part (3) movable mounting is in the inside of shell body (1), when moving part (3) downstream, drive contact unit subassembly (2), micro-gap switch subassembly (4) and the switch linkage of contactor realize the switching of contact.

2. An auxiliary contact for wide current range applications according to claim 1, wherein: the shell body (1) comprises an upper coaming (11), a lower coaming (12) and a top plate (13), wherein the top plate (13) is arranged at the top of the upper coaming (11), the upper coaming (11) is connected with the lower coaming (12) through a buckle (16), a fixed assembly connected with a contactor is arranged at the bottom of the lower coaming (12), and a through hole for the penetration of the moving part (3) is formed in the middle of the bottom of the lower coaming (12).

3. An auxiliary contact for wide current range applications according to claim 2, wherein: the upper coaming (11) is internally provided with a positioning structure for installing the micro switch assembly (4).

4. An auxiliary contact for wide current range applications according to claim 2, wherein: the fixing assembly comprises a hook (14) and a clamping hook (15), wherein the hook (14) is fixed on two sides of the bottom of the lower coaming (12), the clamping hook (15) is fixed on the middle outer side of the bottom of the lower coaming (12), and the outer shell (1) is inserted into the contactor through the hook (14) and is clamped with the contactor through the clamping hook (15).

5. An auxiliary contact for wide current range applications according to claim 1, wherein: the moving part (3) comprises a supporting rod (31), a fixing frame (33) and a pull rod (36), wherein plugs (32) are vertically fixed on two sides of the bottom of the supporting rod (31), the fixing frame (33) is arranged in the middle of the bottom of the supporting rod (31), the bottoms of the fixing frame (33) are vertically fixed with the pull rod (36) respectively, and the pull rod (36) is clamped with the contactor; a positioning plate (34) is arranged in the fixed frame (33).

6. An auxiliary contact for wide current range applications according to claim 5, wherein: the end of the plug (32) is of a smooth semicircular structure; a pressing plate (35) is horizontally fixed in the fixed frame (33), and two positioning plates (34) are arranged and are of splayed structures and are symmetrically arranged by taking the pressing plate (35) as a center; the end part of the pull rod (36) is provided with a clamping groove (37) which is clamped with the contactor.

7. An auxiliary contact for wide current range applications according to claim 5, wherein: the contact unit assembly (2) comprises two first conductive plates (21) and one contact plate (22), wherein the first conductive plates (21) are of U-shaped structures, one end of each first conductive plate (21) is connected with the outer shell (1) through a fixed screw, and the other end of each first conductive plate is connected with the contact plate (22) through a magnetic sheet; a sliding groove is formed in the middle of the contact plate (22), and the locating plate (34) located on the lower side is located in the sliding groove and is in sliding connection with the sliding groove.

8. An auxiliary contact for wide current range applications according to claim 1, wherein: the micro-switch assembly (4) comprises a second conductive plate (41), a micro-switch (43) and a third conductive plate (44), wherein the second conductive plate (41) and the third conductive plate (44) are of U-shaped structures, one ends of the second conductive plate (41) and the third conductive plate (44) are respectively connected with the outer shell (1) through fixing screws, the other end of the second conductive plate (41) is connected with a lower contact piece of the micro-switch (43) through a first lead (42), the other end of the third conductive plate (44) is connected with an upper contact piece of the micro-switch (43) through a second lead (45), the outer side of the micro-switch (43) is rotatably connected with a swinging rod (46) through a rotating shaft (48), and a reset spring (47) which is elastically connected with the micro-switch (43) is arranged on the inner side of the swinging rod (46); the end of the plug (32) is abutted against the outer side of the swing rod (46).

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