Contactor electromagnetic driving module and contactor

Abstract

The invention discloses a contactor electromagnetic driving module and a contactor. The contactor electromagnetic driving module comprises: an electromagnetic assembly comprising a magnet yoke; a coil assembly installed in the yoke and including a coil; the driving shaft is movably arranged in the coil, and the lower end of the driving shaft penetrates through the bottom wall of the magnet yoke; a permanent magnet fixed to a bottom wall of the yoke; and a magnetic conductive member fixed to the lower end of the drive shaft. The driving shaft is used for driving a moving contact of the contactor to move between an open position and a closed position. When the moving contact is driven to the closed position, the permanent magnet is adjacent to or in contact with the magnetic conductive piece so as to apply upward magnetic attraction force on the magnetic conductive piece, so that the moving contact is reliably kept at the closed position. According to the invention, the permanent magnet can increase the contact pressure between the moving contact and the static contact of the contactor, so that the contact resistance between the moving contact and the static contact can be reduced, the current-carrying capacity of the contactor is greatly improved, and the cost, the size and the weight of the contactor are not increased.

Description

Technical Field

[0001] The invention relates to a contactor electromagnetic driving module and a contactor comprising the contactor electromagnetic driving module. Background Art

[0002] In the prior art, high-voltage direct contactors are widely used in new energy vehicles, such as pure electric vehicles and hybrid vehicles. In order to improve the current-carrying capacity of the contactor, it is necessary to increase the contact pressure between the moving contact and the static contact of the contactor and reduce the contact resistance between the moving contact and the static contact. In the prior art, the electromagnetic driving force of the contactor is usually increased by increasing the ampere-turns of the coil. However, increasing the ampere-turns of the coil will inevitably increase the amount of copper used in the coil of the contactor and the volume and weight of the contactor. This is contrary to the technological development trend of new energy vehicles. Summary of the invention

[0003] The purpose of the present invention is to solve at least one aspect of the above-mentioned problems and defects in the prior art.

[0004] According to one aspect of the present invention, a contactor electromagnetic drive module is provided. The contactor electromagnetic drive module includes: an electromagnetic assembly, including a yoke; a coil assembly, installed in the yoke, including a coil; a drive shaft, movably arranged in the coil and having its lower end passing through the bottom wall of the yoke; a permanent magnet, fixed to the bottom wall of the yoke; and a magnetic conductive member, fixed to the lower end of the drive shaft. The drive shaft is used to drive the moving contact of the contactor to move between an open position electrically separated from the static contact and a closed position electrically contacted with the static contact. When the moving contact is driven to the closed position, the permanent magnet is adjacent to or in contact with the magnetic conductive member to exert an upward magnetic attraction on the magnetic conductive member, so that the moving contact is reliably maintained in the closed position.

[0005] According to an exemplary embodiment of the present invention, when the coil is energized, the electromagnetic assembly generates a magnetic circuit surrounding the coil; the magnetic circuit generated by the permanent magnet itself and the magnetic circuit generated by the electromagnetic assembly are spatially independent of each other so as not to interfere with each other.

[0006] According to another exemplary embodiment of the present invention, a mounting hole is formed on the bottom wall of the yoke, the permanent magnet is fixedly embedded in the mounting hole on the bottom wall of the yoke, and a central through hole allowing the lower end of the drive shaft to pass through is formed on the permanent magnet.

[0007] According to another exemplary embodiment of the present invention, the permanent magnet is in a ring shape, the magnetic conductive member is in a circular plate shape, and the outer diameter of the permanent magnet is equal to the outer diameter of the magnetic conductive member.

[0008] According to another exemplary embodiment of the present invention, a socket is formed on the magnetic conductive member, and the lower end of the drive shaft is inserted into the socket on the magnetic conductive member by interference fit, so that the magnetic conductive member is fixed to the lower end of the drive shaft.

[0009] According to another exemplary embodiment of the present invention, the permanent magnet includes a single annular permanent magnet; or the permanent magnet includes two semi-annular permanent magnet halves assembled together.

[0010] According to another exemplary embodiment of the present invention, the coil assembly further includes: a coil skeleton having a hollow cylindrical body portion, the coil is wound on the cylindrical body portion of the coil skeleton, and the drive shaft axially passes through the cylindrical body portion of the coil skeleton.

[0011] According to another exemplary embodiment of the present invention, the coil bobbin further includes a flange portion connected to a lower end of the cylindrical body portion, and the flange portion is fixed to an inner side of a bottom wall of the yoke.

[0012] According to another exemplary embodiment of the present invention, a fixing hole is formed on the bottom wall of the yoke, and a protrusion is formed on the flange portion of the coil frame, and the protrusion is inserted into the fixing hole on the bottom wall of the yoke to fix the coil frame to the yoke.

[0013] According to another exemplary embodiment of the present invention, the yoke is U-shaped and has a top opening opposite to its bottom wall; the electromagnetic assembly also includes: a magnetic conductive plate installed on the top opening of the yoke; and a moving magnetic core fixed to the drive shaft to move with the drive shaft, the moving magnetic core is arranged in the cylindrical main body of the coil skeleton, and the drive shaft passes through the moving magnetic core.

[0014] According to another exemplary embodiment of the present invention, the electromagnetic assembly further includes: a static magnetic core, which is disposed in the cylindrical main body of the coil skeleton and fixed to the magnetic conductive plate, and the drive shaft can movably pass through the through hole on the static magnetic core to be able to move axially relative to the static magnetic core.

[0015] According to another exemplary embodiment of the present invention, the static magnetic core has a conical lower portion, and a conical recess suitable for cooperating with the conical lower portion of the static magnetic core is formed on the moving magnetic core; when the moving contact is driven to the closed position, the static magnetic core and the moving magnetic core are attracted to each other and the conical lower portion of the static magnetic core is matched into the conical recess of the moving magnetic core.

[0016] According to another exemplary embodiment of the present invention, the electromagnetic assembly further includes: a magnetically conductive sleeve fixedly inserted into the lower portion of the cylindrical main body of the coil skeleton, and the lower portion of the moving magnetic core is slidably inserted into the magnetically conductive sleeve so as to be able to move axially relative to the magnetically conductive sleeve.

[0017] According to another exemplary embodiment of the present invention, the bottom surface of the magnetic conductive sleeve is in contact with the bottom wall of the magnetic yoke, and the inner circumferential surface of the magnetic conductive sleeve is in sliding contact with the moving magnetic core.

[0018] According to another exemplary embodiment of the present invention, a positioning step is formed on the upper portion of the moving magnetic core, and the positioning step is used to axially abut against the upper end surface of the magnetic conductive sleeve; when the moving contact is driven to the disconnecting position, the upper end surface of the magnetic conductive sleeve axially abuts against the positioning step of the moving magnetic core to axially position the moving magnetic core in an initial position.

[0019] According to another exemplary embodiment of the present invention, the contactor electromagnetic drive module further comprises: a reset spring compressed between the static magnetic core and the dynamic magnetic core. When the coil loses power, the drive shaft drives the moving contact from the closed position to the open position under the elastic reset force of the reset spring.

[0020] According to another exemplary embodiment of the present invention, a first accommodating hole is formed in the static magnetic core, and a second accommodating hole is formed in the dynamic magnetic core; the upper end of the return spring is installed in the first accommodating hole and axially abuts against the bottom surface of the first accommodating hole; the lower end of the return spring is installed in the second accommodating hole and axially abuts against the bottom surface of the second accommodating hole.

[0021] According to another aspect of the present invention, a contactor is provided. The contactor comprises: a lower shell; the aforementioned contactor electromagnetic drive module, installed in the lower shell; an upper shell, assembled with the lower shell; a moving contact, movably arranged in the upper shell; a stationary contact, fixed to the upper shell; an insulating seat, movably arranged in the upper shell and fixed to the upper end of the drive shaft; and a contact spring, floatingly supporting the moving contact on the insulating seat, for applying contact pressure between the moving contact and the stationary contact. When the coil is energized, the drive shaft drives the moving contact to move from the disconnected position to the closed position under the action of the electromagnetic force generated by the coil; when the moving contact is moved to the closed position, the moving contact is reliably maintained in the closed position under the combined action of the electromagnetic force generated by the coil and the magnetic attraction generated by the permanent magnet.

[0022] According to an exemplary embodiment of the present invention, the contactor further comprises: a coil connector fixed to the coil frame and electrically connected to the coil. One end of the coil connector extends out of the lower housing for electrically connecting to an external low-voltage circuit.

[0023] In the aforementioned exemplary embodiments according to the present invention, the permanent magnet can increase the contact pressure between the moving contact and the stationary contact of the contactor, thereby reducing the contact resistance between the moving contact and the stationary contact, greatly improving the current carrying capacity of the contactor without increasing the cost, volume and weight of the contactor.

[0024] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A cross-sectional view showing a contactor according to an exemplary embodiment of the present invention, wherein the movable contact is in an open position;

[0026] Figure 2 A three-dimensional cross-sectional view showing a contactor electromagnetic driving module according to an exemplary embodiment of the present invention, wherein the moving contact of the contactor is in an open position;

[0027] Figure 3 A plan cross-sectional view showing a contactor electromagnetic drive module according to an exemplary embodiment of the present invention, wherein the moving contact of the contactor is in an open position;

[0028] Figure 4 A cross-sectional view showing a contactor according to an exemplary embodiment of the present invention, wherein the movable contact is in a closed position;

[0029] Figure 5 A plan cross-sectional view of a contactor electromagnetic driving module according to an exemplary embodiment of the present invention is shown, wherein the moving contact of the contactor is in a closed position. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0031] In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0032] According to an overall technical concept of the present invention, a contactor electromagnetic drive module is provided. The contactor electromagnetic drive module includes: an electromagnetic assembly, including a yoke; a coil assembly, installed in the yoke, including a coil; a drive shaft, movably arranged in the coil and having its lower end passing through the bottom wall of the yoke; a permanent magnet, fixed to the bottom wall of the yoke; and a magnetic conductive member, fixed to the lower end of the drive shaft. The drive shaft is used to drive the moving contact of the contactor to move between an open position electrically separated from the static contact and a closed position electrically contacted with the static contact. When the moving contact is driven to the closed position, the permanent magnet is adjacent to or in contact with the magnetic conductive member to exert an upward magnetic attraction on the magnetic conductive member, so that the moving contact is reliably maintained in the closed position.

[0033] According to an overall technical concept of the present invention, a contactor is provided. The contactor comprises: a lower shell; the aforementioned contactor electromagnetic drive module, installed in the lower shell; an upper shell, assembled with the lower shell; a moving contact, movably arranged in the upper shell; a stationary contact, fixed to the upper shell; an insulating seat, movably arranged in the upper shell and fixed to the upper end of the drive shaft; and a contact spring, floatingly supporting the moving contact on the insulating seat, for applying contact pressure between the moving contact and the stationary contact. When the coil is energized, the drive shaft drives the moving contact to move from the disconnected position to the closed position under the action of the electromagnetic force generated by the coil; when the moving contact is moved to the closed position, the moving contact is reliably maintained in the closed position under the combined action of the electromagnetic force generated by the coil and the magnetic attraction generated by the permanent magnet.

[0034] Figure 1 A cross-sectional view showing a contactor according to an exemplary embodiment of the present invention, wherein the moving contact 21 is in an open position; Figure 2 A three-dimensional cross-sectional view showing a contactor electromagnetic driving module 1 according to an exemplary embodiment of the present invention, wherein the moving contact 21 of the contactor is in a disconnected position; Figure 3 A plan cross-sectional view showing a contactor electromagnetic drive module 1 according to an exemplary embodiment of the present invention, wherein the moving contact 21 of the contactor is in an open position; Figure 4 A cross-sectional view showing a contactor according to an exemplary embodiment of the present invention, wherein the moving contact 21 is in a closed position; Figure 5A plan cross-sectional view of a contactor electromagnetic driving module 1 according to an exemplary embodiment of the present invention is shown, wherein the moving contact 21 of the contactor is in a closed position.

[0035] like Figures 1 to 5 As shown, in an exemplary embodiment of the present invention, a contactor electromagnetic drive module 1 is disclosed. The contactor electromagnetic drive module 1 includes: electromagnetic components 10, 11, 141, 142, 17, coil components 12, 13, a drive shaft 15, a permanent magnet 18 and a magnetic conductive member 19. The electromagnetic components 10, 11, 141, 142, 17 include a yoke 10. The coil components 12, 13 are installed in the yoke 10 and include a coil 13. The drive shaft 15 is movably arranged in the coil 13 and its lower end passes through the bottom wall 10a of the yoke 10. The permanent magnet 18 is fixed to the bottom wall 10a of the yoke 10. The magnetic conductive member 19 is fixed to the lower end of the drive shaft 15.

[0036] like Figures 1 to 5 As shown, in the illustrated embodiment, the drive shaft 15 is used to drive the moving contact 21 of the contactor to the disconnected position ( Figure 1-3 The position shown) and the closed position ( Figure 4-5 When the moving contact 21 is driven to the closed position, the permanent magnet 18 is adjacent to or in contact with the magnetic conductive member 19. At this time, the permanent magnet 18 and the magnetic conductive member 19 attract each other, so the permanent magnet 18 exerts an upward magnetic attraction on the magnetic conductive member 19, and the upward magnetic attraction is transmitted to the moving contact 21 via the drive shaft 15, so that the moving contact 21 is reliably maintained in the closed position.

[0037] like Figures 1 to 5 As shown, in the illustrated embodiment, when the coil 13 is energized, the electromagnetic components 10, 11, 141, 142, 17 generate a magnetic circuit surrounding the coil 13. The magnetic circuit generated by the permanent magnet 18 itself and the magnetic circuit generated by the electromagnetic components 10, 11, 141, 142, 17 are spatially independent of each other so as not to interfere with each other. Therefore, the magnetic circuit generated by the permanent magnet 18 itself will not affect the normal operation of the contactor.

[0038] like Figures 1 to 5 As shown, in the illustrated embodiment, a mounting hole is formed on the bottom wall 10a of the yoke 10, the permanent magnet 18 is fixedly embedded in the mounting hole on the bottom wall 10a of the yoke 10, and a central through hole is formed on the permanent magnet 18 to allow the lower end of the drive shaft 15 to pass through.

[0039] like Figures 1 to 5 As shown, in the illustrated embodiment, the permanent magnet 18 is in a circular ring shape, the magnetic conductive member 19 is in a circular plate shape, and the outer diameter of the permanent magnet 18 is equal to the outer diameter of the magnetic conductive member 19 .

[0040] like Figures 1 to 5 As shown, in the illustrated embodiment, a socket is formed on the magnetic conductive member 19, and the lower end of the drive shaft 15 is inserted into the socket on the magnetic conductive member 19 in an interference fit manner, so that the magnetic conductive member 19 is fixed to the lower end of the drive shaft 15.

[0041] like Figures 1 to 5 As shown, in the illustrated embodiment, the permanent magnet 18 includes a single annular permanent magnet. However, the present invention is not limited to the illustrated embodiment, for example, the permanent magnet 18 may include two semi-annular permanent magnet halves assembled together.

[0042] like Figures 1 to 5 As shown, in the illustrated embodiment, the coil assembly 12, 13 further comprises a coil bobbin 12 having a hollow cylindrical body 120. The coil 13 is wound on the cylindrical body 120 of the coil bobbin 12, and the drive shaft 15 axially passes through the cylindrical body 120 of the coil bobbin 12.

[0043] like Figures 1 to 5 As shown, in the illustrated embodiment, the coil bobbin 12 further includes a flange portion 121 connected to the lower end of the cylindrical body portion 120 , and the flange portion 121 is fixed to the inner side of the bottom wall 10 a of the yoke 10 .

[0044] like Figures 1 to 5 As shown, in the illustrated embodiment, a fixing hole is formed on the bottom wall 10a of the yoke 10, and a protrusion 121a is formed on the flange portion 121 of the coil frame 12, and the protrusion 121a is inserted into the fixing hole on the bottom wall 10a of the yoke 10 to fix the coil frame 12 to the yoke 10.

[0045] like Figures 1 to 5 As shown, in the illustrated embodiment, the yoke 10 is U-shaped and has a top opening opposite to its bottom wall 10a. The electromagnetic components 10, 11, 141, 142, 17 also include: a magnetic conductive plate 11 and a moving magnetic core 142. The magnetic conductive plate 11 is mounted on the top opening of the yoke 10. The moving magnetic core 142 is fixed to the drive shaft 15 to move with the drive shaft 15. The moving magnetic core 142 is disposed in the cylindrical main body 120 of the coil skeleton 12, and the drive shaft 15 passes through the moving magnetic core 142.

[0046] like Figures 1 to 5 As shown, in the illustrated embodiment, the electromagnetic assembly 10, 11, 141, 142, 17 further includes a static magnetic core 141, which is disposed in the cylindrical main body 120 of the coil skeleton 12 and is fixed to the magnetic conductive plate 11. The drive shaft 15 movably passes through the through hole on the static magnetic core 141 so as to be able to move axially relative to the static magnetic core 141.

[0047] like Figures 1 to 5 As shown, in the illustrated embodiment, the static magnetic core 141 has a conical lower portion 14a, and a conical recess 14b suitable for matching with the conical lower portion 14a of the static magnetic core 141 is formed on the moving magnetic core 142. When the moving contact is driven to the closed position, the static magnetic core 141 and the moving magnetic core 142 are attracted to each other and the conical lower portion 14a of the static magnetic core 141 is matched into the conical recess 14b of the moving magnetic core 142.

[0048] like Figures 1 to 5 As shown, in the illustrated embodiment, the electromagnetic assembly 10, 11, 141, 142, 17 further includes a magnetic conductive sleeve 17, which is fixedly inserted into the lower portion of the cylindrical main body 120 of the coil skeleton 12. The lower portion of the moving magnetic core 142 is slidably inserted into the magnetic conductive sleeve 17 so as to be able to move axially relative to the magnetic conductive sleeve 17.

[0049] like Figures 1 to 5 As shown, in the illustrated embodiment, the bottom surface of the magnetic conductive sleeve 17 contacts the bottom wall 10 a of the magnetic yoke 10 , and the inner circumferential surface of the magnetic conductive sleeve 17 contacts the moving magnetic core 142 in a sliding manner.

[0050] like Figures 1 to 5 As shown, in the illustrated embodiment, a positioning step 142a is formed on the upper portion of the moving magnetic core 142, and the positioning step 142a is used to axially abut against the upper end surface of the magnetic sleeve 17. When the moving contact is driven to the disconnected position, the upper end surface of the magnetic sleeve 17 axially abuts against the positioning step 142a of the moving magnetic core 142 to axially position the moving magnetic core 142 at the initial position.

[0051] like Figures 1 to 5 As shown, in the illustrated embodiment, the contactor electromagnetic drive module 1 further includes a reset spring 16, which is compressed between the static magnetic core 141 and the moving magnetic core 142. When the coil 13 loses power, the drive shaft 15 drives the moving contact 21 from the closed position to the open position under the elastic reset force of the reset spring 16.

[0052] like Figures 1 to 5 As shown, in the illustrated embodiment, a first receiving hole 14c is formed in the static magnetic core 141, and a second receiving hole 14d is formed in the moving magnetic core 142. The upper end of the return spring 16 is installed in the first receiving hole 14c and axially abuts against the bottom surface of the first receiving hole 14c. The lower end of the return spring 16 is installed in the second receiving hole 14d and axially abuts against the bottom surface of the second receiving hole 14d.

[0053] like Figures 1 to 5As shown, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a lower housing 100, a contactor electromagnetic drive module 1, an upper housing 200, a moving contact 21, a stationary contact 22, an insulating seat 20 and a contact spring 23. The contactor electromagnetic drive module 1 is installed in the lower housing 100. The upper housing 200 is assembled with the lower housing 100. The moving contact 21 is movably arranged in the upper housing 200. The stationary contact 22 is fixed to the upper housing 200. The insulating seat 20 is movably arranged in the upper housing 200 and is fixed to the upper end of the drive shaft 15. The contact spring 23 floats the moving contact 21 on the insulating seat 20 to apply contact pressure between the moving contact 21 and the stationary contact 22.

[0054] like Figures 1 to 5 As shown, in the illustrated embodiment, when the coil 13 is energized, the driving shaft 15 drives the moving contact 21 to move from the open position to the closed position under the action of the electromagnetic force generated by the coil 13. When the moving contact 21 is moved to the closed position, the moving contact 21 is reliably maintained in the closed position under the combined action of the electromagnetic force generated by the coil 13 and the magnetic attraction force generated by the permanent magnet 18. Therefore, the present invention can increase the contact pressure between the moving contact 21 and the stationary contact 22, thereby reducing the contact resistance between the moving contact 21 and the stationary contact 22, and greatly improving the current carrying capacity of the contactor.

[0055] like Figures 1 to 5 As shown, in the illustrated embodiment, the contactor further includes a coil connector 110, which is fixed to the coil frame 12 and electrically connected to the coil 13. One end of the coil connector 110 extends from the lower housing 100 for electrically connecting to an external low-voltage circuit (not shown). In the illustrated embodiment, the static contact 22 is used to electrically connect to an external high-voltage circuit (not shown).

[0056] Those skilled in the art will appreciate that the embodiments described above are exemplary and may be improved upon by those skilled in the art. The structures described in the various embodiments may be freely combined without causing any conflicts in structure or principle, and these changes should fall within the scope of protection of the present invention.

[0057] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred implementations of the present invention and should not be construed as limiting the present invention.

[0058] Although some embodiments of the general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

[0059] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. In addition, any element reference signs in the claims shall not be construed as limiting the scope of the present invention.

Claims

1. A contactor electromagnetic drive module, characterized in that: include: An electromagnetic assembly (10, 11, 141, 142, 17) includes a yoke (10); A coil assembly (12, 13) mounted in the magnetic yoke (10) and comprising a coil (13); A driving shaft (15) movably disposed in the coil (13) and having a lower end passing through a bottom wall (10a) of the yoke (10); a permanent magnet (18) fixed to the bottom wall (10a) of the yoke (10); and A magnetic conductive member (19) is fixed to the lower end of the driving shaft (15). The drive shaft (15) is used to drive the moving contact (21) of the contactor to move between an open position electrically separated from the stationary contact (22) and a closed position electrically contacted with the stationary contact (22). When the moving contact (21) is driven to the closed position, the permanent magnet (18) is adjacent to or in contact with the magnetic conductive member (19) to exert an upward magnetic attraction force on the magnetic conductive member (19), so that the moving contact (21) is reliably maintained in the closed position.

2. The contactor electromagnetic drive module according to claim 1, characterized in that: When the coil (13) is energized, the electromagnetic assembly (10, 11, 141, 142, 17) generates a magnetic circuit surrounding the coil (13); The magnetic circuit generated by the permanent magnet (18) itself and the magnetic circuit generated by the electromagnetic components (10, 11, 141, 142, 17) are independent of each other in space so as not to interfere with each other.

3. The contactor electromagnetic drive module according to claim 1, characterized in that: A mounting hole is formed on the bottom wall (10a) of the yoke (10), the permanent magnet (18) is fixedly embedded in the mounting hole on the bottom wall (10a) of the yoke (10), and a central through hole is formed on the permanent magnet (18) to allow the lower end of the drive shaft (15) to pass through.

4. The contactor electromagnetic drive module according to claim 3, characterized in that: The permanent magnet (18) is in the shape of a ring, the magnetic conductive part (19) is in the shape of a circular plate, and the outer diameter of the permanent magnet (18) is equal to the outer diameter of the magnetic conductive part (19).

5. The contactor electromagnetic drive module according to claim 3, characterized in that: An insertion hole is formed on the magnetic conductive member (19), and the lower end of the drive shaft (15) is inserted into the insertion hole on the magnetic conductive member (19) in an interference fit manner, so that the magnetic conductive member (19) is fixed to the lower end of the drive shaft (15).

6. The contactor electromagnetic drive module according to claim 3, characterized in that: The permanent magnet (18) comprises a single annular permanent magnet; or The permanent magnet (18) comprises two semicircular ring-shaped permanent magnet halves assembled together.

7. The contactor electromagnetic drive module according to claim 1, characterized in that: The coil assembly (12, 13) further comprises: The coil frame (12) has a hollow cylindrical main body (120). The coil (13) is wound on the cylindrical main body (120) of the coil frame (12), and the drive shaft (15) axially passes through the cylindrical main body (120) of the coil frame (12).

8. The contactor electromagnetic drive module according to claim 7, characterized in that: The coil frame (12) also has a flange portion (121) connected to the lower end of the cylindrical main body portion (120), and the flange portion (121) is fixed to the inner side of the bottom wall (10a) of the yoke (10).

9. The contactor electromagnetic drive module according to claim 8, characterized in that: A fixing hole is formed on the bottom wall (10a) of the yoke (10), and a protrusion (121a) is formed on the flange portion (121) of the coil frame (12). The protrusion (121a) is inserted into the fixing hole on the bottom wall (10a) of the yoke (10) to fix the coil frame (12) to the yoke (10).

10. The contactor electromagnetic drive module according to claim 7, characterized in that: The magnetic yoke (10) is U-shaped and has a top opening opposite to its bottom wall (10a); The electromagnetic assembly (10, 11, 141, 142, 17) further includes: A magnetic conductive plate (11) mounted on the top opening of the magnetic yoke (10); and a moving magnetic core (142) fixed to the driving shaft (15) so as to move along with the driving shaft (15), The moving magnetic core (142) is disposed in the cylindrical main body portion (120) of the coil skeleton (12), and the driving shaft (15) passes through the moving magnetic core (142).

11. The contactor electromagnetic drive module according to claim 10, characterized in that: The electromagnetic assembly (10, 11, 141, 142, 17) further includes: A static magnetic core (141) is disposed in the cylindrical main body (120) of the coil frame (12) and fixed to the magnetic conductive plate (11). The driving shaft (15) can movably pass through the through hole on the static magnetic core (141) so as to be able to move axially relative to the static magnetic core (141).

12. The contactor electromagnetic drive module according to claim 11, characterized in that: The static magnetic core (141) has a conical lower portion (14a), and a conical recess (14b) suitable for matching with the conical lower portion (14a) of the static magnetic core (141) is formed on the moving magnetic core (142); When the moving contact is driven to the closed position, the static magnetic core (141) and the moving magnetic core (142) are attracted to each other and the conical lower portion (14a) of the static magnetic core (141) is fitted into the conical recess (14b) of the moving magnetic core (142).

13. The contactor electromagnetic drive module according to claim 11, characterized in that: The electromagnetic assembly (10, 11, 141, 142, 17) further includes: The magnetic conductive sleeve (17) is fixedly inserted into the lower part of the cylindrical main body (120) of the coil skeleton (12). The lower part of the moving magnetic core (142) is slidably inserted into the magnetic conductive sleeve (17) so as to be able to move axially relative to the magnetic conductive sleeve (17).

14. The contactor electromagnetic drive module according to claim 13, characterized in that: The bottom surface of the magnetic conductive sleeve (17) is in contact with the bottom wall (10a) of the magnetic yoke (10), and the inner peripheral surface of the magnetic conductive sleeve (17) is in sliding contact with the moving magnetic core (142).

15. The contactor electromagnetic drive module according to claim 13, characterized in that: A positioning step (142a) is formed on the upper part of the moving magnetic core (142), and the positioning step (142a) is used to axially abut against the upper end surface of the magnetic conductive sleeve (17); When the moving contact is driven to the disconnecting position, the upper end surface of the magnetic conductive sleeve (17) axially abuts against the positioning step (142a) of the moving magnetic core (142) to axially position the moving magnetic core (142) at an initial position.

16. The contactor electromagnetic drive module according to claim 10, characterized in that: Also includes: The return spring (16) is compressed between the static magnetic core (141) and the moving magnetic core (142). When the coil (13) loses power, the drive shaft (15) drives the moving contact (21) to move from the closed position to the open position under the action of the elastic reset force of the reset spring (16).

17. The contactor electromagnetic drive module according to claim 16, characterized in that: A first receiving hole (14c) is formed in the static magnetic core (141), and a second receiving hole (14d) is formed in the moving magnetic core (142); The upper end of the return spring (16) is installed in the first receiving hole (14c) and axially abuts against the bottom surface of the first receiving hole (14c); The lower end of the return spring (16) is installed in the second receiving hole (14d) and axially abuts against the bottom surface of the second receiving hole (14d).

18. A contactor, characterized in that: include: Lower housing (100); The contactor electromagnetic drive module (1) according to any one of claims 1 to 17, mounted in the lower housing (100); An upper housing (200) assembled with the lower housing (100); A moving contact (21) movably disposed in the upper housing (200); A stationary contact (22) fixed to the upper housing (200); An insulating seat (20) is movably disposed in the upper housing (200) and fixed to the upper end of the driving shaft (15); and a contact spring (23) for floatingly supporting the moving contact (21) on the insulating seat (20) and for applying contact pressure between the moving contact (21) and the stationary contact (22), When the coil (13) is energized, the drive shaft (15) drives the moving contact (21) to move from the open position to the closed position under the action of the electromagnetic force generated by the coil (13). When the moving contact (21) is moved to the closed position, the moving contact (21) is reliably maintained in the closed position under the combined action of the electromagnetic force generated by the coil (13) and the magnetic attraction force generated by the permanent magnet (18).

19. The contactor according to claim 18, characterized in that: Also includes: A coil connector (110) is fixed to the coil frame (12) and is electrically connected to the coil (13). One end of the coil connector (110) extends out from the lower housing (100) and is used for electrical connection to an external low-voltage circuit.

Images