Contactor magnetic core, contactor electromagnetic assembly and contactor

Abstract

To provide a contactor that can reduce cost and volume. [Solution] The contactor core comprises a stationary core (41) suitable for fixing to the magnetic plate (2) of the contactor and having a body suitable for insertion into the coil frame (31) of the contactor, and a movable core (42) configured to be movably inserted into the coil frame (31) and having a flange located at the upper end of the movable core (42). When the stationary core (41) and the movable core (42) are inserted into the coil frame (31), the body of the stationary core (41) faces the flange of the movable core (42), and the diameter of the body of the stationary core (41) is slightly larger than the diameter of the flange of the movable core (42) in order to increase the electromagnetic attraction between the stationary core (41) and the movable core (42).

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of Chinese Patent Application No. CN202411416357.8, filed with the China National Intellectual Property Administration on October 11, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a contact core, a contact electromagnetic assembly including the contact core, and a contact including the contact electromagnetic assembly.

Background Art

[0003] In the prior art, a contact electromagnetic assembly typically includes a U - shaped magnetic yoke, a magnetic plate installed at the upper opening of the U - shaped magnetic yoke, a coil assembly provided on the magnetic yoke, and a core provided on a coil skeleton of the coil assembly. The core includes a stationary core and a movable core. The stationary core is fixed to the magnetic plate, and the body of the stationary core is inserted into the coil skeleton. The movable core is movably inserted into the coil skeleton and is movable relative to the stationary core between an operating position in axial contact with the stationary core and an initial position axially separated from the stationary core. In the prior art, the body of the stationary core and the movable core are usually cylindrical without steps and have the same diameter and the same magnetic conduction area, so the electromagnetic attraction between the stationary core and the movable core becomes small. Therefore, in the prior art, in order to increase the electromagnetic attraction between the stationary core and the movable core, it is necessary to increase the number of turns of the contact coil, which not only increases the amount of copper used in the coil, increases the cost, but also increases the volume.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention is made to overcome or alleviate at least one aspect of the above - mentioned drawbacks.

Means for Solving the Problems

[0005] According to one aspect of the present invention, a contactor core is provided. The contactor core comprises a stationary core suitable for being fixed to a magnetic plate of a contactor and having a body suitable for being inserted into the coil frame of a contactor, and a movable core configured to be movably inserted into the coil frame and having a flange located at the upper end of the movable core. When the stationary and movable cores are inserted into the coil frame, the body of the stationary core faces the flange of the movable core, and the diameter of the body of the stationary core is slightly larger than the diameter of the flange of the movable core in order to increase the electromagnetic attraction between the stationary and movable cores.

[0006] According to an exemplary embodiment of the present invention, the body of the stationary magnetic core has a first cylindrical portion located at the lower end of the body and a second cylindrical portion located at the upper end of the body, the first cylindrical portion and the second cylindrical portion are coaxially connected, and the diameter of the first cylindrical portion is smaller than the diameter of the second cylindrical portion, such that the body of the stationary magnetic core has a stepped shaft shape with different diameters.

[0007] According to another exemplary embodiment of the present invention, the diameter of the first cylindrical portion of the stationary magnetic core is equal to or slightly smaller than the diameter of the flange of the movable magnetic core, and the diameter of the second cylindrical portion of the stationary magnetic core is slightly larger than the diameter of the flange of the movable magnetic core.

[0008] According to another exemplary embodiment of the present invention, the body of the stationary magnetic core is a shaft shape having a predetermined diameter such that the outer circumferential surface of the body of the stationary magnetic core is a cylindrical surface without steps.

[0009] According to another exemplary embodiment of the present invention, a first central through-hole is formed in the stationary magnetic core, a first positioning step is formed in the first central through-hole, and the first positioning step is used to abut axially against the upper end of the return spring of the contactor; a second central through-hole is formed in the movable magnetic core, a second positioning step is formed in the second central through-hole, and the second positioning step is used to abut axially against the lower end of the return spring.

[0010] According to another exemplary embodiment of the present invention, the stationary magnetic core also has a positioning flange portion formed on the outside of the upper end of the body of the stationary magnetic core, the positioning flange portion being configured to abut against the bottom surface of the magnetic plate.

[0011] According to another exemplary embodiment of the present invention, the stationary magnetic core also has a fixed portion coaxially connected to the upper end of the body of the stationary magnetic core, the fixed portion of the stationary magnetic core is used to fix it to a fixing hole in the magnetic plate.

[0012] According to another exemplary embodiment of the present invention, the stationary magnetic core fixing portion is suitable for being inserted into a fixing hole in a magnetic plate or for being riveted into a fixing hole in a magnetic plate.

[0013] According to another aspect of the present invention, a contactor electromagnetic assembly is provided. The contactor electromagnetic assembly comprises a U-shaped magnetic yoke, a magnetic plate installed in the upper opening of the magnetic yoke, a coil assembly installed in the magnetic yoke, the coil assembly including a coil frame and a coil wound around the coil frame, and the contactor magnetic core. The stationary magnetic core is fixed to the magnetic plate, the body of the stationary magnetic core is inserted into the coil frame, while the movable magnetic core is movably inserted into the coil frame.

[0014] According to an exemplary embodiment of the present invention, the movable magnetic core is movable between an operating position in which it is in axial contact with the stationary magnetic core and an initial position in which it is separated from the stationary magnetic core in the axial direction, and when the coil is energized, the movable magnetic core is moved from the initial position to the operating position by the action of an electromagnetic force.

[0015] According to another exemplary embodiment of the present invention, the contactor electromagnetic assembly further comprises a return spring that is axially compressed between the stationary core and the movable core and used to apply an elastic restorative force to the movable core. When the coil is de-energized, the movable core is moved from the operating position to the initial position by the action of the return spring.

[0016] According to another exemplary embodiment of the present invention, a limiting step is formed in the coil frame and is used to axially abut against the flange of the movable magnetic core to restrict the movable magnetic core to its initial position.

[0017] According to another exemplary embodiment of the present invention, a first central through-hole is formed in the stationary magnetic core, a first positioning step is formed in the first central through-hole, a second central through-hole is formed in the movable magnetic core, a second positioning step is formed in the second central through-hole, the upper end of the return spring is housed in the first central through-hole and abuts axially against the first positioning step, and the lower end of the return spring is housed in the second central through-hole and abuts axially against the second positioning step.

[0018] According to another exemplary embodiment of the present invention, a fixing hole is formed in the magnetic plate, and the fixing portion of the stationary magnetic core is fixed to the fixing hole in the magnetic plate.

[0019] According to another exemplary embodiment of the present invention, the contactor electromagnetic assembly further comprises a magnetic sleeve inserted at the lower end of the coil frame, the movable magnetic core being movably positioned in the magnetic sleeve such that the movable magnetic core is axially movable relative to the magnetic sleeve.

[0020] According to another exemplary embodiment of the present invention, the magnetic yoke comprises a pair of side plates and a bottom plate located between the pair of side plates, wherein the lower end of the magnetic sleeve is pressed against the bottom plate of the magnetic yoke and the upper end of the magnetic sleeve is pressed against a limiting step inside the coil frame, so that the magnetic sleeve cannot move in the axial direction.

[0021] According to another exemplary embodiment of the present invention, the contactor electromagnetic assembly further comprises a drive shaft, which passes axially through a stationary core and a movable core and is used to drive the movable contact of the contactor to move between an open position, which is electrically isolated from the stationary contact, and a closed position, which is electrically in contact with the stationary contact, the lower end of the drive shaft being welded to the movable core and movable axially relative to the stationary core.

[0022] According to another exemplary embodiment of the present invention, when the movable magnetic core is moved to the operating position, the drive shaft drives the movable contact to the closed position, and when the movable magnetic core is moved to the initial position, the drive shaft drives the movable contact to the open position.

[0023] According to another exemplary embodiment of the present invention, the coil assembly further comprises a terminal module. The terminal module comprises a pair of coil terminals, each connected to two terminals of the coil; a pair of signal terminals for electrical connection to auxiliary contacts of a contactor; and a holder, which is injection-molded onto the pair of coil terminals and the pair of signal terminals such that the holder, the pair of coil terminals, and the pair of signal terminals form a single integrated component. The coil skeleton is injection-molded onto the terminal module, so that the coil skeleton and the terminal module form a single integrated component.

[0024] According to another exemplary embodiment of the present invention, the signal terminal has a mating end suitable for mating with an auxiliary contact adapter terminal, a slot hole is formed in the magnetic plate, and the mating end of the signal terminal is exposed from the slot hole in the magnetic plate for mating with the auxiliary contact adapter terminal.

[0025] According to another exemplary embodiment of the present invention, the coil frame has a mating portion, the mating portion has an insertion slot that allows for the insertion of a connector, the coil terminal has a first pin, the signal terminal has a second pin, and the first and second pins extend into the insertion slot of the mating portion to electrically connect with the connector inserted into the insertion slot.

[0026] According to another aspect of the present invention, a contactor is provided. The contactor includes a housing in which an arc extinguishing chamber and a receiving chamber are formed, a pair of stationary contacts fixed to the housing and extending into the arc extinguishing chamber, a movable contact provided in the arc extinguishing chamber and movable between an open position electrically separated from the pair of stationary contacts and a closed position in electrical contact with the pair of stationary contacts, and the contactor electromagnetic assembly installed in the receiving chamber of the housing. The drive shaft of the contactor electromagnetic assembly extends into the arc extinguishing chamber and is used to drive the movable contact to move between an open position electrically separated from the pair of stationary contacts and a closed position in electrical contact with the pair of stationary contacts.

[0027] In the foregoing exemplary embodiment according to the present invention, since the diameter of the second cylindrical portion of the stationary core is slightly larger than the diameter of the flange of the movable core, the magnetic conduction area of the main body of the stationary core becomes larger than the magnetic conduction area of the stationary core, thereby effectively increasing the electromagnetic attraction force between the stationary core and the movable core.

[0028] In the foregoing exemplary embodiment according to the present invention, the electromagnetic attraction force in the initial state or the holding state can be adjusted according to the needs of the application by using the first cylindrical portion having a diameter different from that of the second cylindrical portion. Within a specific range, the diameter of the first cylindrical portion has a positive correlation with the initial electromagnetic attraction force. That is, the larger the diameter of the first cylindrical portion, the larger the initial electromagnetic attraction force. Within a specific range, the diameter of the first cylindrical portion has a negative correlation with the electromagnetic attraction force in the holding state. That is, the smaller the diameter of the first cylindrical portion, the larger the electromagnetic attraction force in the holding state.

[0029] Also, the present invention can reduce the cost and volume of the contactor by reducing the number of turns of the coil and the amount of copper used while ensuring sufficient electromagnetic attraction force.

[0030] The above and other features of the present invention will become more apparent by describing exemplary embodiments thereof in detail with reference to the accompanying drawings. [Brief explanation of the drawing]

[0031] [Figure 1] This is an illustrative perspective view of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 2] This is an axial cross-sectional view of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 3] This is an exploded view illustrating an exemplary contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 4] This is a planar cross-sectional view of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention, in which the movable magnetic core is in an initial position separated axially from the stationary magnetic core. [Figure 5] This is a plan view of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention, in which the movable core is in an operating position in axial contact with the stationary core, and the drive shaft is shown. [Figure 6] This figure illustrates the movable and stationary magnetic cores of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 7] This is an illustrative perspective view of terminals and coils of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 8] This is an illustrative perspective view of a terminal module and coil of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 9] This is an illustrative perspective view of a coil assembly of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. [Figure 10] This is a plan view cross-sectional view of a contactor electromagnetic assembly according to another exemplary embodiment of the present invention. [Figure 11] This is a diagram illustrating the movable and stationary magnetic cores of a contactor electromagnetic assembly according to another exemplary embodiment of the present invention. [Modes for carrying out the invention]

[0032] Exemplary embodiments of this disclosure are described below in detail with reference to the accompanying drawings. Similar reference numerals refer to similar elements. However, this disclosure may be embodied in many different ways and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided to make this disclosure thorough and complete and to fully convey the concepts of this disclosure to those skilled in the art.

[0033] The following detailed description includes many specific details to enable a full understanding of the disclosed embodiments for illustrative purposes. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other cases, well-known structures and devices are shown schematically to simplify the drawings.

[0034] According to the general concept of the present invention, a contactor core is provided. The contactor core comprises a stationary core suitable for being fixed to the magnetic plate of a contactor and having a body suitable for being inserted into the coil frame of a contactor, and a movable core configured to be movably inserted into the coil frame and having a flange located at the upper end of the movable core. When the stationary and movable cores are inserted into the coil frame, the body of the stationary core faces the flange of the movable core, and the diameter of the body of the stationary core is slightly larger than the diameter of the flange of the movable core in order to increase the electromagnetic attraction between the stationary and movable cores.

[0035] According to another general concept of the present invention, a contactor electromagnetic assembly is provided. The contactor electromagnetic assembly comprises a U-shaped magnetic yoke, a magnetic plate installed in the upper opening of the magnetic yoke, a coil assembly installed in the magnetic yoke, the coil assembly including a coil frame and a coil wound around the coil frame, and the contactor magnetic core. The stationary magnetic core is fixed to the magnetic plate, the body of the stationary magnetic core is inserted into the coil frame, while the movable magnetic core is movably inserted into the coil frame.

[0036] According to another general concept of the present invention, a contactor is provided. The contactor comprises a housing having an arc extinguishing chamber and a receiving chamber formed therein; a pair of stationary contacts fixed to the housing and extending into the arc extinguishing chamber; a movable contact provided in the arc extinguishing chamber and movable between an open position electrically isolated from the pair of stationary contacts and a closed position electrically in contact with the pair of stationary contacts; and the contactor electromagnetic assembly installed in the receiving chamber of the housing. A drive shaft of the contactor electromagnetic assembly extends into the arc extinguishing chamber and is used to drive the movable contact to move between an open position electrically isolated from the pair of stationary contacts and a closed position electrically in contact with the pair of stationary contacts.

[0037] Figure 1 shows a perspective view of an exemplary contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 2 shows an axial cross-sectional view of the contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 3 shows an exploded view of an exemplary contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 4 shows a plan cross-sectional view of the contactor electromagnetic assembly according to an exemplary embodiment of the present invention, where the movable magnetic core 42 is in an initial position axially separated from the stationary magnetic core 41. Figure 5 shows a plan cross-sectional view of the contactor electromagnetic assembly according to an exemplary embodiment of the present invention, where the movable magnetic core 42 is in an operating position axially in contact with the stationary magnetic core 41, and the drive shaft 7 is shown. Figure 6 shows an illustrative diagram of the movable core 42 and stationary core 41 of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 7 shows an illustrative perspective view of the terminals 33, 34 and coil 32 of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 8 shows an illustrative perspective view of the terminal module and coil 32 of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention. Figure 9 shows an illustrative perspective view of the coil assembly 3 of a contactor electromagnetic assembly according to an exemplary embodiment of the present invention.

[0038] As shown in Figures 1 to 9, exemplary embodiments of the present invention disclose a contactor core. The contactor core includes a stationary core 41 and a movable core 42. The stationary core 41 is suitable for being fixed to the magnetic plate 2 of the contactor and has a body 410 suitable for being inserted into the coil frame 31 of the contactor. The movable core 42 is suitable for being movably inserted into the coil frame 31 and has a flange 42a located at the upper end of the movable core 42. In the illustrated embodiment, when the stationary core 41 and the movable core 42 are inserted into the coil frame 31, the body 410 of the stationary core 41 faces the flange 42a of the movable core 42, and the diameter of the body 410 of the stationary core 41 is slightly larger than the diameter of the flange 42a of the movable core 42 in order to increase the electromagnetic attraction between the stationary core 41 and the movable core 42. For example, the electromagnetic attraction of the contactor can be increased when it is in the holding state and the initial state.

[0039] As shown in Figures 1 to 9, in the illustrated embodiment, the body 410 of the stationary magnetic core 41 has a first cylindrical portion 41a located at the lower end of the body 410 and a second cylindrical portion 41b located at the upper end of the body 410. The first cylindrical portion 41a and the second cylindrical portion 41b are coaxially connected, and the diameter of the first cylindrical portion 41a is smaller than the diameter of the second cylindrical portion 41b, so that the body 410 of the stationary magnetic core 41 has a stepped shaft shape with different diameters.

[0040] As shown in Figures 1 to 9, in the illustrated embodiment, the diameter of the first cylindrical portion 41a of the stationary magnetic core 41 is equal to or slightly smaller than the diameter of the flange 42a of the movable magnetic core 42, and the diameter of the second cylindrical portion 41b of the stationary magnetic core 41 is slightly larger than the diameter of the flange 42a of the movable magnetic core 42.

[0041] As shown in Figures 1 to 9, in the illustrated embodiment, a first central through-hole 41e is formed in the stationary magnetic core 41, and a first positioning step 41f is formed in the first central through-hole 41e. The first positioning step 41f is used to press axially against the upper end of the contactor's return spring 6. A second central through-hole 42e is formed in the movable magnetic core 42, and a second positioning step 42f is formed in the second central through-hole 42e. The second positioning step 42f is used to abut axially against the lower end of the return spring 6.

[0042] As shown in Figures 1 to 9, in the illustrated embodiment, the stationary magnetic core 41 also has a positioning flange portion 41c formed on the outside of the upper end of the main body 410 of the stationary magnetic core 41, and the positioning flange portion 41c is configured to abut against the bottom surface of the magnetic plate 2.

[0043] As shown in Figures 1 to 9, in the illustrated embodiment, the stationary magnetic core 41 also has a fixed portion 41d coaxially connected to the upper end of the main body 410 of the stationary magnetic core 41. The fixed portion 41d of the stationary magnetic core 41 is used to fix it to the fixing hole 2d of the magnetic plate 2.

[0044] As shown in Figures 1 to 9, in the illustrated embodiment, the fixing portion 41d of the stationary magnetic core 41 is suitable for being inserted into the fixing hole 2d of the magnetic plate 2 by interlocking or for being riveted into the fixing hole 2d of the magnetic plate 2.

[0045] As shown in Figures 1 to 9, another exemplary embodiment of the present invention also discloses a contactor electromagnetic assembly. The contactor electromagnetic assembly includes a magnetic yoke 1, a magnetic plate 2, a coil assembly 3, and a contactor magnetic core. The magnetic yoke 1 is U-shaped. The magnetic plate 2 is installed in the upper opening of the magnetic yoke 1. The coil assembly 3 is provided on the magnetic yoke 1 and includes a coil frame 31 and a coil 32 wound around the coil frame 31. A stationary magnetic core 41 is fixed to the magnetic plate 2, the body 410 of the stationary magnetic core 41 is inserted into the coil frame 31, and a movable magnetic core 42 is movably inserted into the coil frame 31.

[0046] As shown in Figures 1 to 9, in the illustrated embodiment, the movable magnetic core 42 is movable between an operating position in which it is in axial contact with the stationary magnetic core 41 and an initial position in which it is separated from the stationary magnetic core 41 in the axial direction. When the coil 32 is energized, the movable magnetic core 42 is moved from its initial position to its operating position by the action of electromagnetic force.

[0047] As shown in Figures 1 to 9, in the illustrated embodiment, the contactor electromagnetic assembly further includes a return spring 6, which is compressed axially between the stationary core 41 and the movable core 42, applying an elastic return force to the movable core 42. When the coil 32 is de-energized, the movable core 42 is moved from the operating position to the initial position by the action of the return spring 6.

[0048] As shown in Figures 1 to 9, in the illustrated embodiment, the limiting step portion 31a is formed on the coil frame 31, and the limiting step portion 31a is used to contact the flange 42a of the movable magnetic core 42 in the axial direction in order to restrict the movable magnetic core 42 to its initial position.

[0049] As shown in Figures 1 to 9, in the illustrated embodiment, a first central through hole 41e is formed in the stationary magnetic core 41, a first positioning step 41f is formed in the first central through hole 41e, a second central through hole 42e is formed in the movable magnetic core 42, and a second positioning step 42f is formed in the second central through hole 42e. The upper end of the return spring 6 is housed in the first central through hole 41e and abuts against the first positioning step 41f in the axial direction, and the lower end of the return spring 6 is housed in the second central through hole 42e and abuts against the second positioning step 42f in the axial direction.

[0050] As shown in Figures 1 to 9, in the illustrated embodiment, a fixing hole 2d is formed in the magnetic plate 2, and the fixing portion 41d of the stationary magnetic core 41 is fixed to the fixing hole 2d of the magnetic plate 2.

[0051] As shown in Figures 1 to 9, in the illustrated embodiment, the contactor electromagnetic assembly further includes a magnetic sleeve 5, which is inserted into the lower end of the coil frame 31. The movable magnetic core 42 is positioned in the magnetic sleeve 5 so as to be axially movable relative to the magnetic sleeve 5.

[0052] As shown in Figures 1 to 9, in the illustrated embodiment, the magnetic yoke 1 includes a pair of side plates 11 and a bottom plate 12 located between the pair of side plates 11. The lower end of the magnetic sleeve 5 is pressed against the bottom plate 12 of the magnetic yoke 1, and the upper end of the magnetic sleeve 5 is pressed against the limiting step portion 31a inside the coil frame 31, so that the magnetic sleeve 5 cannot move in the axial direction.

[0053] As shown in Figures 1 to 9, in the illustrated embodiment, the contactor electromagnetic assembly further comprises a drive shaft 7, which passes axially through a stationary core 41 and a movable core 42 to drive a movable contact (not shown) of the contactor to move between an open position where it is electrically isolated from a stationary contact (not shown) and a closed position where it is electrically in contact with the stationary contact. The lower end of the drive shaft 7 is welded to the movable core 42 and is axially movable relative to the stationary core 41.

[0054] As shown in Figures 1 to 9, in the illustrated embodiment, when the movable magnetic core 42 is moved to the operating position, the drive shaft 7 drives the movable contact to the closed position. When the movable magnetic core 42 is moved to the initial position, the drive shaft 7 drives the movable contact to the open position.

[0055] As shown in Figures 1 to 9, in the illustrated embodiment, the coil assembly 3 also includes a terminal module. The terminal module includes a pair of coil terminals 33, a pair of signal terminals 34, and a retainer 35. The pair of coil terminals 33 are connected to the two terminals 32 of the coil 32, respectively. The pair of signal terminals 34 are used for electrical connection to auxiliary contacts (not shown) of the contactor. The retainer 35 is injection molded to the pair of coil terminals 33 and the pair of signal terminals 34, so that the retainer 35, the pair of coil terminals 33, and the pair of signal terminals 34 form a single integrated part. The coil frame 31 is injection molded to the terminal module, so that the coil frame 31 and the terminal module form a single integrated part.

[0056] As shown in Figures 1 to 9, in the illustrated embodiment, the signal terminal 34 has a mating end 34b suitable for mating with an auxiliary contact adapter terminal (not shown), and a slot hole 2b is formed in the magnetic plate 2. The mating end 34d of the signal terminal 34 is exposed from the slot hole 2b of the magnetic plate 2 for mating with the auxiliary contact adapter terminal.

[0057] As shown in Figures 1 to 9, in the illustrated embodiment, the coil frame 31 has a mating portion 310, the mating portion 310 has an insertion slot 301 that allows insertion of a connector (not shown). The coil terminal 33 has a first pin 33a, and the signal terminal 34 has a second pin 34a. The first pin 33a and the second pin 34a extend into the insertion slot 301 of the mating portion 310 to electrically connect to the connector inserted into the insertion slot 301.

[0058] As shown in Figures 1 to 9, in the illustrated embodiments, the electromagnetic attractive force in the initial or holding state can be adjusted according to the needs of the application using a first cylindrical portion 41b having a different diameter from that of the second cylindrical portion 41b. Within a certain range, the diameter of the first cylindrical portion 11a has a positive correlation with the initial electromagnetic attractive force; that is, the larger the diameter of the first cylindrical portion 11a, the greater the initial electromagnetic attractive force. Within a certain range, the diameter of the first cylindrical portion 41b has a negative correlation with the electromagnetic attractive force in the holding state; that is, the smaller the diameter of the first cylindrical portion 41b, the greater the electromagnetic attractive force in the holding state.

[0059] As shown in Figures 1 to 9, another exemplary embodiment of the present invention also discloses a contactor. The contactor includes a housing, a pair of stationary contacts, a movable contact, and a contactor electromagnetic assembly. The housing has an arc extinguishing chamber and a receiving chamber formed therein. The pair of stationary contacts are fixed to the housing and extend into the arc extinguishing chamber. The movable contact is located in the arc extinguishing chamber and can move between an open position, which is electrically isolated from the pair of stationary contacts, and a closed position, which is electrically in contact with the pair of stationary contacts. The contactor electromagnetic assembly is located in the receiving chamber of the housing. A drive shaft 7 of the contactor electromagnetic assembly extends into the arc extinguishing chamber and is used to drive the movable contact between the open and closed positions.

[0060] Figure 10 shows a plan view of a contactor electromagnetic assembly according to another exemplary embodiment of the present invention. Figure 11 shows an exemplary view of the movable core 42 and stationary core 41 of the contactor electromagnetic assembly according to another exemplary embodiment of the present invention.

[0061] The only difference between the contactor electromagnetic assemblies shown in Figures 10 and 11 and those shown in Figures 1 to 9 is the structure of the stationary magnetic core.

[0062] As shown in Figures 10 and 11, in the illustrated embodiment, the body 410 of the stationary magnetic core 41 is a shaft shape with a predetermined diameter such that the outer circumferential surface of the body 410 of the stationary magnetic core 41 is a cylindrical surface without steps. The diameter of the body 410 of the stationary magnetic core 41 is slightly larger than the diameter of the flange 42a of the movable magnetic core 42.

[0063] Aside from the differences mentioned above, the other technical features of the contactor electromagnetic assemblies shown in Figures 10 and 11 are essentially the same as those of the contactor electromagnetic assemblies shown in Figures 1 to 9, and these features can be found by referring to the contactor electromagnetic assemblies shown in Figures 1 to 9.

[0064] Those skilled in the art should understand that the above embodiments are illustrative and not intended to be limiting. For example, many modifications to the above embodiments may be made by those skilled in the art, and the various features described in different embodiments may be freely combined with each other without structural or principle contradiction.

[0065] While several exemplary embodiments have been illustrated and described, those skilled in the art will understand that various modifications or changes can be made to these embodiments without departing from the principles and spirit of the disclosure. The scope of the disclosure is defined in the claims and its equivalents.

[0066] Where used herein, elements described in the singular and preceded by the words "a" or "an" should be understood not to exclude multiple such elements or steps unless otherwise expressly stated. Furthermore, references to "one embodiment" of the present invention are not intended to be construed as excluding the existence of additional embodiments that similarly incorporate the described features. Moreover, unless otherwise expressly stated to the contrary, embodiments "comprising" or "having" one or more elements having a particular characteristic may include additional such elements that do not possess that characteristic.

Claims

1. It is a contactor core, - A stationary magnetic core (41) suitable for being fixed to the magnetic plate (2) of the contactor, having a body (410) suitable for being inserted into the coil skeleton (31) of the contactor, - A movable magnetic core (42) configured to be movably inserted into the coil frame (31), the movable magnetic core (42) having a flange (42a) located at the upper end of the movable magnetic core (42) Equipped with, When the stationary core (41) and the movable core (42) are inserted into the coil frame (31), the body (410) of the stationary core (41) faces the flange (42a) of the movable core (42), and in order to increase the electromagnetic attraction between the stationary core (41) and the movable core (42), the diameter of the body (410) of the stationary core (41) is slightly larger than the diameter of the flange (42a) of the movable core (42). Contactor magnetic core.

2. The contactor magnetic core according to claim 1, wherein the body (410) of the stationary magnetic core (41) has a first cylindrical portion (11a) located at the lower end of the body (410) and a second cylindrical portion (41b) located at the upper end of the body (410), the first cylindrical portion (11a) and the second cylindrical portion (41b) are coaxially connected, and the diameter of the first cylindrical portion (41b) is smaller than the diameter of the second cylindrical portion (41b) such that the body (410) of the stationary magnetic core (41) has a stepped shaft shape with different diameters.

3. The contactor core according to claim 2, wherein the diameter of the first cylindrical portion (41a) of the stationary core (41) is equal to or slightly smaller than the diameter of the flange (42a) of the movable core (42), and the diameter of the second cylindrical portion (41b) of the stationary core (41) is slightly larger than the diameter of the flange (42a) of the movable core (42).

4. The contactor magnetic core according to claim 1, wherein the body (410) of the stationary magnetic core (41) has a shaft shape having a predetermined diameter such that the outer circumferential surface of the body (410) of the stationary magnetic core (41) is a cylindrical surface without steps.

5. A first central through-hole (41e) is formed in the stationary magnetic core (41), a first positioning step (41f) is formed in the first central through-hole (41e), and the first positioning step (41f) is used to abut axially against the upper end of the return spring (6) of the contactor. The contactor magnetic core according to claim 1, wherein a second central through hole (42e) is formed in the movable magnetic core (42), a second positioning step (42f) is formed in the second central through hole (42e), and the second positioning step (42f) is used to abut axially against the lower end of the return spring (6).

6. The contactor magnetic core according to claim 1, wherein the stationary magnetic core (41) also has a positioning flange portion (41c) formed on the outside of the upper end of the main body (410) of the stationary magnetic core (41), and the positioning flange portion (41c) is configured to abut against the bottom surface of the magnetic plate (2).

7. The contactor magnetic core according to claim 1, wherein the stationary magnetic core (41) also has a fixing portion (41d) coaxially connected to the upper end of the main body (410) of the stationary magnetic core (41), and the fixing portion (41d) of the stationary magnetic core (41) is used to fix it in the fixing hole (2d) of the magnetic plate (2).

8. The contactor magnetic core according to claim 7, wherein the fixing portion (41d) of the stationary magnetic core (41) is suitable for being inserted by interlocking into the fixing hole (2d) of the magnetic plate (2) or for being riveted into the fixing hole (2d) of the magnetic plate (2).

9. A contactor electromagnetic assembly, A U-shaped magnetic yoke (1), A magnetic plate (2) is installed in the upper opening of the magnetic yoke (1), A coil assembly (3) installed on the magnetic yoke (1), comprising a coil frame (31) and a coil (32) wound around the coil frame (31), The contactor magnetic core according to any one of claims 1 to 8 Equipped with, The stationary magnetic core (41) is fixed to the magnetic plate (2), the main body (410) of the stationary magnetic core (41) is inserted into the coil frame (31), while the movable magnetic core (42) is movably inserted into the coil frame (31). Contactor electromagnetic assembly.

10. The movable magnetic core (42) is movable between an operating position in which it is in axial contact with the stationary magnetic core (41) and an initial position in which it is separated from the stationary magnetic core (41) in the axial direction. The contactor electromagnetic assembly according to claim 9, wherein when the coil (32) is energized, the movable magnetic core (42) is moved from the initial position to the operating position by the action of an electromagnetic force.

11. The system further comprises a return spring (6) that is compressed axially between the stationary magnetic core (41) and the movable magnetic core (42) and is used to apply an elastic return force to the movable magnetic core (42), The contactor electromagnetic assembly according to claim 10, wherein when the coil (32) stops energizing, the movable magnetic core (42) is moved from the operating position to the initial position by the action of the return spring (6).

12. The contactor electromagnetic assembly according to claim 11, wherein a limiting step (31a) is formed in the coil frame (31), and the limiting step (31a) is used to axially abut against the flange (42a) of the movable magnetic core (42) in order to restrict the movable magnetic core (42) to the initial position.

13. A first central through-hole (41e) is formed in the stationary magnetic core (41), a first positioning step (41f) is formed in the first central through-hole (41e), a second central through-hole (42e) is formed in the movable magnetic core (42), and a second positioning step (42f) is formed in the second central through-hole (42e). The contactor electromagnetic assembly according to claim 11, wherein the upper end of the return spring (6) is housed in the first central through hole (41e) and abuts axially against the first positioning step (41f), and the lower end of the return spring (6) is housed in the second central through hole (42e) and abuts axially against the second positioning step (42f).

14. The contactor electromagnetic assembly according to claim 9, wherein a fixing hole (2d) is formed in the magnetic plate (2), and the fixing portion (41d) of the stationary magnetic core (41) is fixed to the fixing hole (2d) of the magnetic plate (2).

15. The coil frame (31) is further provided with a magnetic sleeve (5) inserted into the lower end, The contactor electromagnetic assembly according to claim 12, wherein the movable magnetic core (42) is movably positioned in the magnetic sleeve (5) such that the movable magnetic core (42) is axially movable relative to the magnetic sleeve (5).

16. The contactor electromagnetic assembly according to claim 15, wherein the magnetic yoke (1) comprises a pair of side plates (11) and a bottom plate (12) located between the pair of side plates (11), and the lower end of the magnetic sleeve (5) is pressed against the bottom plate (12) of the magnetic yoke (1) and the upper end of the magnetic sleeve (5) is pressed against the limiting step portion (31a) inside the coil frame (31), so that the magnetic sleeve (5) cannot move in the axial direction.

17. The device further comprises a drive shaft (7), the drive shaft (7) passing axially through the stationary magnetic core (41) and the movable magnetic core (42), and is used to drive the movable contact of the contactor to move between an open position where it is electrically isolated from the stationary contact and a closed position where it is electrically in contact with the stationary contact. The lower end of the drive shaft (7) is welded to the movable magnetic core (42) and is movable in the axial direction relative to the stationary magnetic core (41), as described in claim 10.

18. When the movable magnetic core (42) is moved to the operating position, the drive shaft (7) drives the movable contact to the closed position. The contactor electromagnetic assembly according to claim 17, wherein when the movable magnetic core (42) is moved to the initial position, the drive shaft (7) drives the movable contact to the open position.

19. The coil assembly (3) further comprises a terminal module, The aforementioned terminal module is A pair of coil terminals (33) are connected to the two terminals (12a) of the coil (32), A pair of signal terminals (34) for electrical connection to the auxiliary contacts of the contactor, A holder (35), wherein the holder (35), the pair of coil terminals (33), and the pair of signal terminals (34) are injection molded onto the pair of coil terminals (33) and the pair of signal terminals (34) so ​​that they form an integrated part. Equipped with, The contactor electromagnetic assembly according to any one of claims 9 to 18, wherein the coil frame (31) is injection molded onto the terminal module, and the coil frame (31) and the terminal module form an integrated component.

20. The contactor electromagnetic assembly according to claim 19, wherein the signal terminal (34) has a mating end (34b) suitable for mating with an auxiliary contact adapter terminal, a slot hole (2b) is formed in the magnetic plate (2), and the mating end (34b) of the signal terminal (34) is exposed from the slot hole (2b) of the magnetic plate (2) for mating with the auxiliary contact adapter terminal.

21. The contactor electromagnetic assembly according to claim 19, wherein the coil frame (31) has a mating portion (310), the mating portion (310) has an insertion slot (301) that allows insertion of a connector, the coil terminal (33) has a first pin (33a), the signal terminal (34) has a second pin (34a), and the first pin (33a) and the second pin (34a) extend into the insertion slot (301) of the mating portion (310) to electrically connect with the connector inserted into the insertion slot (301).

22. It is a contactor, A housing in which an arc extinguishing chamber and a receiving chamber are formed, A pair of stationary contacts fixed to the housing and extending to the arc extinguishing chamber, A movable contact is provided in the arc extinguishing chamber and is movable between an open position, which is electrically isolated from the pair of stationary contacts, and a closed position, which is electrically in contact with the pair of stationary contacts. The contactor electromagnetic assembly according to any one of claims 9 to 21, which is installed in the receiving chamber of the housing, Equipped with, The drive shaft (7) of the contactor electromagnetic assembly extends into the arc extinguishing chamber and is used to drive the movable contact to move between the open position, which is electrically isolated from the pair of stationary contacts, and the closed position, which is electrically in contact with the pair of stationary contacts. Contactor.

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