Operating mechanism for magnetic latching ac contactor

Abstract

This invention discloses an operating mechanism for a magnetically latched AC contactor, including a magnetically latched drive mechanism. The magnetically latched drive mechanism includes a coil with an iron core and an oscillator. The oscillator features a hinged central oscillating plate, which is pivotally connected to moving contact frames on both sides. The upper part of each moving contact frame is pivotally connected to a mounting bracket and the moving contact. The mounting bracket is fixed to a housing, and the moving contact is aligned with the stationary contact. This magnetically latched AC contactor's operating mechanism provides more efficient and stable switching.

Description

Technical Field

[0001] This invention relates to a contactor, and more particularly to the operating mechanism of a magnetically latching AC contactor. Background Technology

[0002] Chinese Patent No. CN205984819U discloses a compression spring and a push-rod type relay including the compression spring. The compression spring includes a compression spring body with a clamping section extending obliquely upward toward the face of the spring body facing the armature. The clamping surface of the clamping section forms an obtuse angle with the face of the spring body facing the armature. The push-rod type relay includes a base, a magnetic circuit portion arranged on the base and connected by a push rod, and a contact portion. The magnetic circuit portion mainly consists of an iron core arranged on the base, a coil fitted on the iron core, a yoke arranged beside the coil, an armature arranged on the yoke with a seesaw effect, and a compression spring that applies spring force to the back of the armature. The compression spring includes a compression spring body with a clamping section extending obliquely upward toward the face of the spring body facing the armature. The clamping surface of the clamping section forms an obtuse angle with the face of the spring body facing the armature. However, the transmission mechanism connected to the magnetic latching mechanism in this relay has insufficient protection capability, making it difficult to ensure stable and efficient driving, and easily leading to situations where the transmission is not in place. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an operating mechanism for a magnetically latched AC contactor, wherein the operation of the transmission mechanism connected to the magnetically latched drive mechanism in the operating mechanism of the magnetically latched AC contactor is more stable and efficient, and the moving contact can be driven into position stably for a long time.

[0004] Therefore, the present invention provides an operating mechanism for a magnetically latched AC contactor, including a magnetically latched drive mechanism, which includes a coil with an iron core and an oscillator. The oscillator is characterized in that: the middle oscillating plate of the oscillator is hinged, the middle oscillating plate is pivotally connected to the moving contact frames on both sides, the upper part of the moving contact frame is pivotally connected to the moving contact on the mounting bracket, the mounting bracket is fixed on the housing, and the moving contact is aligned with the stationary contact.

[0005] Preferably, the mounting bracket has downwardly extending fixed feet and connecting lugs on both sides of the upper part of the fixed bracket. The fixed feet are inserted and fixed to the housing. The moving contact bracket has two side plates. The upper part of the moving contact is located between the two side plates and the two connecting lugs. The shaft passes through the connecting lugs, side plates and moving contact to achieve pivot connection. The shaft is connected in series with two sets of mounting brackets, moving contact brackets and moving contacts and is located on both sides of the middle swing plate.

[0006] Preferably, the side of the oscillator is fixed with diagonally distributed connecting strips, and the oscillator is hinged to the intermediate oscillating plate by the connecting strips.

[0007] Preferably, the moving contact frame has a main frame plate that blocks the moving contact in the direction near the stationary contact, and the moving contact frame has space for the moving contact to swing in the direction away from the stationary contact. The moving contact is equipped with a torsion spring that presses the moving contact toward the stationary contact.

[0008] Preferably, conductive crossbars are fixedly connected to both sides of the oscillator, and the conductive crossbars are fixed with downward-facing conductive pins.

[0009] Preferably, the stationary contact is L-shaped, the vertically distributed portion of the stationary contact is the contact portion that matches the moving contact, and the horizontal portion of the stationary contact extends out of the housing and has a wiring terminal.

[0010] Technical effects of the present invention:

[0011] 1. In this invention, the magnetic holding drive mechanism is hinged to an intermediate swing plate, pivotally connected to a moving contact frame, and pivotally connected to a mounting bracket. This makes the contact between the moving and stationary contacts more stable and effective. Furthermore, the swing direction of the moving contact is protected by the two side plates of the moving contact frame, allowing for more precise contact with the stationary contact. The mounting bracket also acts as a fixing support for the moving contact frame and the moving contact. Because the mounting bracket, moving contact frame, and moving contact are hinged to a single shaft, the structure is more compact and enables efficient transmission of linkage mechanism movements.

[0012] 2. The torsion spring on the moving contact frame of the present invention applies a preload force to the moving contact toward the stationary contact, and the moving contact has the ability to swing away from the stationary contact and swing to the right relative to the lower part of the moving contact frame (the main frame plate of the moving contact frame blocks the movement towards the stationary contact). This allows the moving contact to have a preload force when pressed against the stationary contact, and has a preload stroke, making its contact conductivity more stable and effective. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the operating mechanism of the magnetic latching AC contactor provided by the present invention.

[0014] Figure 2 for Figure 1 A schematic diagram of the operating mechanism of the magnetic latching AC contactor after removing the right outer casing.

[0015] Figure 3 for Figure 2 A three-dimensional schematic diagram.

[0016] Figure 4 for Figure 3 A schematic diagram of the operating mechanism of the magnetic latching AC contactor after removing the right inner shell.

[0017] Figure 5for Figure 4 A schematic diagram of the operating mechanism of the magnetic latching AC contactor after removing the left inner shell.

[0018] Figure 6 for Figure 5 A schematic diagram of the operating mechanism of the magnetic latching AC contactor after removing the left housing.

[0019] Figure 7 for Figure 6 A three-dimensional schematic diagram. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Reference Figure 1-7As shown, the operating mechanism of the magnetically latched AC contactor provided by the present invention includes a magnetically latched drive mechanism. The magnetically latched drive mechanism includes a coil 1 with an iron core and an oscillator 2. The oscillator 2 is hinged to a middle oscillating plate 3. The middle oscillating plate 3 is pivotally connected to moving contact frames 4 on both sides. The upper part of the moving contact frame 4 is pivotally connected to a mounting frame 5 and a moving contact 6. The mounting frame 5 is fixed on the housing 7. The moving contact 6 is aligned with the stationary contact 8. The mounting bracket 5 has downwardly extending fixed feet 51 and connecting lugs 52 on both sides of the upper part of the fixed bracket. The fixed feet 51 are inserted and fixed to the housing 7. The moving contact bracket 4 has two side plates 41. The upper part of the moving contact 6 is located between the two side plates 41 and the two connecting lugs 52. The mounting bracket 5 surrounds the upper part of the moving contact bracket 4 and the moving contact 6 from right to left. The moving contact bracket 4 places the moving contact 6 inside the connecting lugs 52 of the mounting bracket 5 from left to right. The shaft 9 passes through the connecting lugs 52, the side plates 41 and the moving contact 6 to achieve a pivot connection. The shaft 9 is connected in series with two sets of mounting brackets 5, moving contact brackets 4 and moving contacts 6 and is located on both sides of the intermediate swing plate 3. The swing device 2 has obliquely distributed connecting strips 21 fixed on its side. The swing device 2 is hinged to the intermediate swing plate 3 by the connecting strips 21. Both sides of the oscillator 2 are fixedly connected to conductive crossbars 10, which are fixed with downwardly distributed conductive plug-in pins 11. The stationary contact is L-shaped, with the vertically distributed part of the stationary contact being the contact portion that matches the moving contact. The horizontal part of the stationary contact extends out of the housing and has a wiring terminal. The moving contact frame 4 has a main frame plate 42 on the side near the stationary contact 8 to block the moving contact 6. The moving contact frame 4 has space left on the side away from the stationary contact 8 for the moving contact 6 to swing. The moving contact 6 is equipped with a torsion spring 13, which presses the moving contact 6 toward the stationary contact 8. When the moving contact 6 swings to contact the stationary contact 8, the stationary contact 8 pushes the moving contact to overcome the preload force of the torsion spring 13 and swing to the right, thereby obtaining the preload stroke.

[0022] Reference Figure 4 , Figure 6 , Figure 7 As shown, the magnetic holding drive mechanism of the present invention includes a coil 1, an iron core is provided in the coil 1, the coil 1 forms a magnetic circuit system, and L-shaped yokes 12 are connected to both ends of the coil 1. The oscillator 2 is the armature. The oscillator 2 will swing left and right as the direction of the current connected to the coil 1 changes. During the swinging process, the oscillator 2 drives the middle oscillating plate 3.

[0023] Reference Figure 1-7The working principle of this invention is as follows: When the current changes, the coil 1 causes the magnetic field to change, which in turn causes the magnetic poles to change regularly. This drives the oscillator 2 to swing back and forth regularly through the magnetic field. The oscillator 2 drives the intermediate oscillating plate 3 to move back and forth. The intermediate oscillating plate 3 drives the moving contact frame 4 through the hinge shaft. The moving contact frame 4 drives the moving contact 6 to swing back and forth. During the swinging process, the contact conduction and disconnection of the stationary contact are achieved. The torsion spring 13 on the moving contact frame 4 applies a preload force to the moving contact 6 toward the stationary contact. The moving contact 6 has the ability to swing away from the stationary contact 8 and swing to the right relative to the lower part of the moving contact frame (the main frame plate 42 of the moving contact frame 4 blocks the direction closer to the stationary contact 8). This allows the moving contact to have a preload force when pressing against the stationary contact, making its contact conduction more stable and effective.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An operating mechanism for a magnetically latched AC contactor, comprising a magnetically latching drive mechanism, the magnetically latching drive mechanism including a coil with an iron core and an oscillator, characterized in that: The oscillator is hinged to the middle oscillating plate, the middle oscillating plate is pivotally connected to the moving contact frames on both sides, the upper part of the moving contact frame is pivotally connected to the upper part of the mounting frame and the moving contact, the mounting frame is fixed on the housing, and the moving contact is aligned with the stationary contact. The mounting bracket has downwardly extending fixed feet and connecting lugs on both sides of the upper part of the fixed bracket. The fixed feet are inserted and fixed to the housing. The moving contact bracket has two side plates. The upper part of the moving contact is located between the two side plates and the two connecting lugs. The shaft passes through the connecting lugs, side plates and moving contact to achieve pivot connection. The shaft is connected in series with two sets of mounting brackets, moving contact brackets and moving contacts and is located on both sides of the middle swing plate. The moving contact frame has a main frame plate that blocks the moving contact in the direction near the stationary contact, and a space is left on the moving contact frame away from the stationary contact for the moving contact to swing. The moving contact is equipped with a torsion spring, which presses the moving contact toward the stationary contact.

2. The operating mechanism of the magnetic latching AC contactor according to claim 1, characterized in that: The side of the oscillator is fixed with diagonally distributed connecting strips, and the oscillator is hinged to the intermediate oscillating plate by the connecting strips.

3. The operating mechanism of the magnetic latching AC contactor according to claim 1 or 2, characterized in that: Both sides of the oscillator are fixedly connected to conductive crossbars, and the conductive crossbars are fixed with downward-facing conductive pins.

4. The operating mechanism of the magnetic latching AC contactor according to claim 1 or 2, characterized in that: The stationary contact is L-shaped, with the vertically distributed portion of the stationary contact being the contact portion that matches the moving contact. The horizontal portion of the stationary contact extends out of the housing and has a wiring terminal.

5. The operating mechanism of the magnetic latching AC contactor according to claim 3, characterized in that: The stationary contact is L-shaped, with the vertically distributed portion of the stationary contact being the contact portion that matches the moving contact. The horizontal portion of the stationary contact extends out of the housing and has a wiring terminal.

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