Contactor

Abstract

The utility model relates to a contactor. The contactor comprises: a fixed seat, having a bottom side and a top side opposite to the bottom side; a main contact mechanism, arranged on the fixed seat near the bottom side, wherein the main contact mechanism comprises a plurality of main contact modules arranged side by side, each main contact module comprises a static contact and a moving contact capable of moving relative to the static contact; a driving mechanism, arranged on the fixed seat near the top side, and driving the moving contact connected to each main contact module, wherein the driving mechanism can apply a force to the moving contact to make it lean towards the static contact in response to a preset condition; and a first biasing member, arranged in the fixed seat and configured to apply a force to the moving contact to make it move away from the static contact.

Description

Technical Field

[0001] The utility model relates to a switch electrical appliance, in particular to a contactor. Background Art

[0002] Contactor is a widely used switching device, which uses electromagnetic, pneumatic or hydraulic principles to realize the on and off of the main circuit through the control circuit. Contactor has the advantages of strong current cutting ability, fast action, safe operation, frequent operation and remote control. It can control a variety of power loads, such as motors.

[0003] Contactors usually face rough structures, difficult maintenance and insulation problems due to the internal layout of many components including control units and opening and closing actuators. Therefore, there is a certain demand in the industry to improve the internal layout of contactors and reduce the difficulty of contactor assembly and maintenance. Utility Model Content

[0004] The utility model aims to provide a contactor which can at least solve some of the above technical problems.

[0005] According to one aspect of the utility model, a contactor is provided, comprising: a fixed seat, having a bottom side and a top side opposite to the bottom side; a main contact mechanism, arranged on the fixed seat close to the bottom side, wherein the main contact mechanism comprises a plurality of main contact modules arranged side by side, each main contact module comprising a static contact and a moving contact capable of moving relative to the static contact; a driving mechanism, arranged on the fixed seat close to the top side, and driving the moving contact connected to each main contact module, wherein the driving mechanism can apply a force to the moving contact to make it lean toward the static contact in response to a preset condition; and a first biasing member, arranged in the fixed seat and configured to apply a force to the moving contact to make it move away from the static contact.

[0006] According to the contactor provided by this solution, the main circuit where the main contact mechanism is located is arranged at the bottom of the contactor, and the drive mechanism that drives the main contact mechanism is arranged at the top of the contactor, which is convenient for disassembly, inspection and maintenance of the drive mechanism. At the bottom of the contactor, the main contact mechanism is modularly arranged and divided into several side-by-side contact modules. These contact modules have uniform specifications and can be easily replaced, which simplifies the assembly and maintenance difficulty of the contactor and reduces the cost.

[0007] In some embodiments, the fixed seat includes a base, a middle seat, a middle shell and a top cover that are detachably connected along a direction from the bottom side to the top side, wherein the main contact mechanism is located between the base and the middle seat, and the driving mechanism is located between the middle seat and the top cover and is surrounded by the middle shell.

[0008] In some embodiments, the fixing seat is formed with a plurality of spaced partitions near the bottom side, and a cavity is defined between two adjacent partitions, and the main contact module is arranged in the cavity. The partition helps to provide a better phase-to-phase insulation effect for the main circuit.

[0009] In some embodiments, the main contact module includes: a housing; a bracket, which is movably arranged in the housing and controllably connected to the driving mechanism; wherein one end of the stationary contact is arranged in the housing and the other end extends from the housing, and the moving contact is movably arranged in the bracket in the housing. Each contact module is modularly designed, and the contacts and related components are basically integrated in a single housing, which cooperates with the partition to further improve the phase-to-phase insulation effect of the main circuit.

[0010] In some embodiments, the main contact module includes a second biasing member abutting between the side of the moving contact facing away from the stationary contact and the bracket. The second biasing member presses the moving contact to the stationary contact after closing, which helps to make the moving contact and the stationary contact more stably engaged and prevents unstable closing caused by the movement of the moving contact.

[0011] In some embodiments, the contactor includes a control module electrically connected to the driving mechanism, wherein the control module is arranged between the middle seat and the top cover and is surrounded by the middle shell.

[0012] In some embodiments, the control module includes a control circuit board, and the contactor includes a power terminal, a PLC control terminal, and an IoT interface terminal mounted to the control circuit board. These terminals are standardized interface terminals, which can easily realize power access, PLC control, and IoT intelligent configuration of the contactor.

[0013] In some embodiments, the driving mechanism includes: a movable frame, drivingly connected to the moving contact, wherein the first biasing member rests between the movable frame and the fixed seat; a moving iron core, installed on the movable frame; a static iron core, arranged on the fixed seat, and the static iron core and the main contact mechanism are respectively located on opposite sides of the moving iron core; and a coil, arranged adjacent to the static iron core.

[0014] In some embodiments, a cover plate is provided between the static iron core and the top side of the fixing seat, and the cover plate is provided with a third biasing member abutting against the static iron core.

[0015] In some embodiments, the movable frame has two obliquely opposite mounting posts, and the two first biasing members are respectively mounted on the two mounting posts.

[0016] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 is a schematic diagram of a contactor according to an embodiment of the utility model;

[0019] Figure 2 is an exploded schematic diagram of a contactor according to an embodiment of the utility model;

[0020] Figure 3 is a front view of a contactor according to an embodiment of the utility model;

[0021] Figure 4 yes Figure 3 AA section view;

[0022] Figure 5 yes Figure 3 CC section view;

[0023] Figure 6 is a schematic diagram of a main contact module according to an embodiment of the utility model;

[0024] Figure 7 It is a partial schematic diagram of a driving mechanism according to an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1-contactor; 2-fixed seat; 21-base; 211-partition; 212-cavity; 22-middle seat; 23-middle shell; 231-partition plate; 24-top cover; 25-bottom side; 26-top side; 3-main contact mechanism; 31-main contact module; 311-shell; 317-clip; 312-static contact; 313-moving contact; 314-bracket; 315-opening; 316-biasing member; 318-support member; 4-arc extinguishing mechanism; 5-driving mechanism; 51-static iron core; 52-coil; 53-moving iron core; 54-movable frame; 541-mounting column; 55-cover; 56-shell; 6-control module; 7-biasing member DETAILED DESCRIPTION

[0027] Now, with reference to the accompanying drawings, the schematic scheme of the contactor disclosed in the utility model is described in detail. Although the accompanying drawings are provided to present some embodiments of the utility model, the accompanying drawings do not have to be drawn according to the size of the specific implementation scheme, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0029] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0030] The contactor disclosed in the present invention improves the layout of the internal main circuit and the driving mechanism, arranges the main circuit at the bottom of the contactor, and arranges the driving mechanism (such as an electromagnetic mechanism) at the top of the contactor, which facilitates the disassembly and maintenance of the driving mechanism and provides a better interphase insulation structure for the main circuit. The main circuit adopts a modular design, which simplifies the assembly and maintenance of the contactor.

[0031] Figures 1 to 5 The contactor 1 according to the present disclosure is shown exemplarily. As shown in the figure, the contactor 1 has a lateral direction T, a longitudinal direction L and a height direction H which are perpendicular to each other. The fixed seat 2 of the contactor 1 adopts a split structure. Along the height direction H from the bottom 25 to the top 26 of the contactor 1, the fixed seat 2 is divided into a base 21, a middle seat 22, a middle shell 23 and a top cover 24, which are detachably assembled together, wherein the middle shell 23 is a hollow structure constructed by a circumferential wall and open front and back, which is used to accommodate the functional components of the contactor 1. The base 21 is used to accommodate the main circuit, and the middle shell 23 is located between the middle seat 22 and the top cover 24, and is used to accommodate the components (such as the drive mechanism 5 and the control module 6) located at the top of the contactor 1. Any suitable method can be selected to assemble the various parts of the fixed seat 2 together, including but not limited to snap-fit ​​connection and bolt connection. For example, the middle shell 23 and the middle seat 22 can be connected together by bolts. For another example, the top cover 24 may be provided with an elastic arm with a bayonet, and the middle shell 23 may be provided with a raised buckle, and then the two may be clamped together by inserting the buckle into the bayonet. In other embodiments not shown, the top cover may also be provided with a buckle, and the middle shell may be provided with a bayonet.

[0032] The contactor 1 is mounted with functional components such as the main circuit, the drive mechanism, the arc extinguishing mechanism and the control module on the fixed base 2. As shown in the figure, the main circuit is arranged on the base 21 near the bottom 25 of the contactor 1, and is clamped between the base 21 and the middle base 22. The bottom 25 of the contactor 1 is larger and more stable, and there is enough space to design a better interphase insulation structure for the main circuit. In the embodiment shown, the base 21 includes a plurality of partitions 211 arranged along the transverse direction T of the contactor 1, and these partitions 211 are used to define a plurality of cavities 212 inside the base 21. Figure 1 Two partitions 211 and three cavities 212 enclosed by the two partitions 211 and the side walls of the base 21 are shown. Each cavity 212 is suitable for accommodating a single main contact module 31 of the main contact mechanism 3, and the partitions 211 provide good phase-to-phase insulation for the main contact module 31.

[0033] The main contact mechanism 3 is clamped between the base 21 and the middle seat 22 of the fixed seat 2. In one embodiment, each main contact module 31 of the main contact mechanism 31 can be connected to the base 21 by bolts, and the middle seat 22 and the main contact module 31 are clamped together. The main contact mechanism 3 is composed of a plurality of main contact modules 31, which are all modularly designed and can be replaced with each other, thereby simplifying the installation and maintenance of the main contact mechanism.

[0034] Figure 6 The internal layout of a single main contact module 31 is shown as an example. As shown in the figure, the main contact module 31 integrates a static contact 312, a moving contact 313 and an arc extinguishing mechanism 4 in a housing 311. The housing 56 is configured for each main contact module 31, not only for modular design considerations, but also the housing 56 cooperates with the partition 211 of the base 21 to provide a better phase-to-phase insulation effect for the main circuit. The arc extinguishing mechanism 4 includes a plurality of parallel arc extinguishing grids, and the housing 311 is formed with an opening for releasing the arc at a position corresponding to the arc extinguishing mechanism 4. In order to achieve the snap connection between the main contact module 31 and the middle seat 22, a buckle 317 can also be formed on the side of the housing 311 facing the middle seat 22, and the middle seat 22 is formed with an adapted bayonet, so that the two can be snapped together. Alternatively, a bayonet can be formed in the housing 311, and an adapted buckle can be formed in the middle seat 22. One end of the stationary contact 312 is fixed in the housing 311 and has a stationary contact point, while the other end of the stationary contact 312 extends from the housing 311, and the extended end is configured as a terminal, and can be screwed together with the base 21 through the extended end. The moving contact 313 is supported by the bracket 314. Figure 6As shown, the bracket 314 can be arranged perpendicular to the extension direction of the static contact 312 and can move relative to the housing 311. A portion of the bracket 314 is located in the housing 31 to support the static contact 312, and one end of the bracket 314 extends out of the housing 311 for operation by the drive mechanism 5. To this end, the extended end of the bracket 314 can be formed with an engagement portion for engaging the drive mechanism 5, such as an opening 315. The moving contact 313 is movably mounted to the bracket 314 and extends in the same direction as the static contact 312. During the movement of the bracket 314 along the extension direction substantially perpendicular to the static contact 312, the moving contact 313 can be driven to approach and engage with the static contact 312, or to separate from the static contact 312, thereby achieving the closing or breaking of the main circuit. A support member 318 can also be provided on the side of the moving contact 313 facing away from the static contact 312, and the support member basically extends across the entire length direction of the moving contact 313. A biasing member 316 may be arranged between the moving contact 313 and the bracket 314, and the biasing member applies a biasing force directed toward the stationary contact 312 to the moving contact 313. During the closing of the main circuit, the biasing member 316 presses the moving contact 313 against the stationary contact 312, ensuring stable engagement of the moving contact 313 and the stationary contact 312, and preventing instability of the main circuit caused by the movement of the moving contact 313. In the case of the presence of the support member 318, the biasing member 316 abuts between the support member 318 and the inner wall of the bracket 314.

[0035] The drive mechanism 5 is arranged between the middle seat 22 and the top cover 24 near the top side 26 of the fixed seat 2, and is surrounded by the middle shell 23. The drive mechanism 5 can use any suitable drive mechanism to control the main circuit to close. In the embodiment shown, the drive mechanism 5 uses an electromagnetic drive mechanism. Figure 7 As shown, the moving iron core 53 of the driving mechanism 5 is mounted on the movable frame 54, and the movable frame 54 is driven and connected to the bracket 314 on which the moving contact 313 is mounted. To this end, the movable frame 54 can be installed with a hook for engaging with the opening 315 of the aforementioned bracket 314. In another embodiment, the movable frame 54 can also be formed with an opening, and the bracket 314 can be formed with a hook. The middle seat 22 can be provided with an avoidance opening for the driving engagement between the movable frame 54 and the bracket 314.

[0036] The static iron core 51 of the driving mechanism 5 is installed in the middle shell 23 , and a coil 52 is installed near the static iron core 51 . Figure 4 and Figure 5A mounting method of the static iron core 51 and the coil 52 is shown. In the illustrated embodiment, the coil 52 is mounted in the housing 56 to form a coil skeleton, and the static iron core 51 surrounds the housing 56. When the coil 52 is energized, the moving iron core 53 is driven by electromagnetic attraction and approaches the static iron core 51, thereby pulling the bracket 314 and the moving contact 313 to move via the movable frame 54, so as to achieve the engagement of the moving contact 313 with the static contact 312. A guide structure may be provided between the movable frame 54 and the inner wall of the middle shell 23 to limit the movement path of the moving iron core 53, for example, one of the two may be provided with a guide groove or a guide plate, and the other may move along the guide groove or the guide plate.

[0037] When the coil 52 is powered off, the moving contact 313 should be able to separate from the static contact 312 to achieve the main circuit breaking. In the present disclosure, the separation of the moving contact 313 and the static contact 312 is achieved by means of a reset biasing member 7. In the illustrated embodiment, the biasing member 7 is pressed between the movable frame 54 and the fixed seat 2 (e.g., the middle shell 23 of the fixed seat 2). When the coil 52 is powered on to close the main circuit, the biasing member 7 is compressed to accumulate energy. Once the coil 52 is powered off, the biasing member 7 is able to release energy, pushing the movable frame 54 to move, so that the moving iron core 53 is away from the static iron core 51, and the movement of the movable frame 54 pushes the bracket 314, driving the moving contact 313 away from the static contact 312, thereby achieving the main circuit breaking.

[0038] The biasing member 7 can be any suitable retractable elastic structure, such as a spring. In order to facilitate the installation of the biasing member 7, a mounting post 541 is provided on the movable frame 54, and the spring can be sleeved on the mounting post 541. The mounting post 541 can be provided with one or more. Figure 7 As shown, two mounting posts 541 are provided on the movable frame 54 , which are arranged opposite to each other along the diagonal corners of the movable frame 54 , and a spring is mounted on each mounting post 541 .

[0039] In the illustrated embodiment, a cover plate 55 may also be provided on the side of the static iron core 51 facing away from the moving iron core 53, the cover plate 55 being clamped between the static iron core 51 and the top cover 24 of the fixed seat 2, and a biasing member (not shown in the figure) pressing against the static iron core 51 is provided on the side of the cover plate 55 facing the static iron core 51.

[0040] The action of the driving mechanism 5 is controlled by the control module 6. The control module 6 can be installed in the middle shell 23 together with the driving mechanism 5. Figure 2As shown, a partition plate 231 is formed on the middle shell 23, dividing the internal space of the middle shell 23 into two upper and lower chambers, wherein the control module 6 is arranged in the upper chamber, and the drive mechanism 5 is arranged in the lower chamber. The control module 6 can optionally use a control circuit board electrically connected to the coil 52 to control the on and off of the coil 52. According to the state of the main circuit, the control module 6 can supply power to the coil 52, drive the moving iron core 53 toward the static iron core 51, and realize the engagement of the moving contact 313 with the static contact 312. In addition, the control module 6 can also cut off the power supply of the coil 52 according to the state of the main circuit, thereby allowing the reset biasing member 7 to drive the moving iron core 53 away from the static iron core 51, so as to separate the moving contact 313 from the static contact 312. PLC terminals, power terminals, and IoT interface terminals can be installed on the control circuit board. By adopting standardized terminal connections, power access, PLC control, and IoT intelligent configuration of the contactor 1 are realized.

[0041] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0042] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A contactor, characterized in that: include: A fixing seat (2) having a bottom side (25) and a top side (26) opposite to the bottom side (25); A main contact mechanism (3) is arranged on the fixed seat (2) near the bottom side (25), wherein the main contact mechanism (3) comprises a plurality of main contact modules (31) arranged side by side, and each main contact module (31) comprises a stationary contact (312) and a movable contact (313) movable relative to the stationary contact (312); a drive mechanism (5) arranged on the fixed seat (2) near the top side (26) and driving a moving contact (313) connected to each main contact module (31), wherein the drive mechanism (5) can apply a force to the moving contact (313) to make it lean against the stationary contact (312) in response to a preset condition; A first biasing member (7) is arranged in the fixed seat (2) and is configured to apply a force to the moving contact (313) to move it away from the stationary contact (312).

2. The contactor according to claim 1, characterized in that: The fixed seat (2) comprises a base (21), a middle seat (22), a middle shell (23) and a top cover (24) which are detachably connected along a direction from the bottom side (25) to the top side (26), wherein the main contact mechanism (3) is located between the base (21) and the middle seat (22), and the drive mechanism (5) is located between the middle seat (22) and the top cover (24) and is surrounded by the middle shell (23).

3. The contactor according to claim 1, characterized in that: The fixing seat (2) is formed with a plurality of spaced partitions (211) near the bottom side (25), a cavity (212) is defined between two adjacent partitions (211), and the main contact module (31) is arranged in the cavity (212).

4. The contactor according to any one of claims 1 to 3, characterized in that: The main contact module (31) comprises: Housing (311); a bracket (314), movably arranged in the housing (311) and controllably connected to the driving mechanism (5); One end of the stationary contact (312) is arranged in the housing (311), and the other end extends out of the housing (311), while the moving contact (313) is movably arranged on the bracket (314) in the housing (311).

5. The contactor according to claim 4, characterized in that: The main contact module (31) includes a second biasing member (316) abutting between a side of the moving contact (313) facing away from the stationary contact (312) and the bracket (314).

6. The contactor according to claim 2, characterized in that: The contactor comprises a control module (6) electrically connected to the drive mechanism (5), wherein the control module (6) is arranged between the middle seat (22) and the top cover (24) and is surrounded by the middle shell (23).

7. The contactor according to claim 6, characterized in that: The control module (6) comprises a control circuit board, and the contactor comprises a power supply terminal, a PLC control terminal and an IoT interface terminal mounted on the control circuit board.

8. The contactor according to any one of claims 1 to 3, characterized in that: The driving mechanism (5) comprises: A movable frame (54) drivingly connected to the movable contact (313), wherein the first biasing member (7) abuts between the movable frame (54) and the fixed seat (2); A moving iron core (53) mounted on the movable frame (54); A static iron core (51) is arranged on the fixed seat (2), and the static iron core and the main contact mechanism (3) are respectively located on opposite sides of the moving iron core (53); The coil (52) is arranged adjacent to the static iron core (51).

9. The contactor according to claim 8, characterized in that: A cover plate (55) is provided between the static iron core (51) and the top side (26) of the fixing seat (2), and the cover plate (55) is provided with a third biasing member abutting against the static iron core (51).

10. The contactor according to claim 8, characterized in that: The movable frame (54) has two obliquely opposed mounting posts (541), and two first biasing members (7) are respectively sleeved on the two mounting posts (541).

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