Electromagnetic clamping jaw

Abstract

The utility model discloses an electromagnetic clamping jaw, which relates to the technical field of clamping jaw structures and comprises a clamping component, and the clamping component comprises a clamping seat and two clamping jaws slidably connected to the clamping seat. The driving assembly comprises a clamping driving part and a reversing driving part, the clamping driving part is in transmission connection with the two clamping jaws, the reversing driving part is magnetically connected with the clamping driving part, two sets of permanent magnets are arranged between the clamping driving part and the reversing driving part, and each permanent magnet is provided with an N pole and an S pole; and the reversing assembly is arranged below the reversing driving part, is in transmission connection with the reversing driving part and is used for driving the reversing driving part to rotate. According to the electromagnetic clamping jaw, clamping or opening of the clamping jaw is achieved between the clamping driving part and the reversing driving part through the permanent magnets, and the reversing driving part changes the working state of the clamping driving part through the rotation angle. And the reversing driving part is directly connected with the reversing assembly and drives the reversing assembly, so that the clamping force control is more accurate, the power-off pressure maintaining effect of the clamping jaw is improved, and the clamping jaw is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping jaw structures, in particular to an electromagnetic clamping jaw. Background Art

[0002] Electromagnetic grippers are an automated device that uses electromagnetic force for clamping and are widely used in automated production lines, material handling, precision assembly and other fields. They can provide fast and precise clamping force and are suitable for grasping a variety of metals and conductive materials. The advantages of electromagnetic grippers include no need for external compressed air or cables, reducing deployment costs, and being able to maintain magnetic force in the event of a power outage to prevent the workpiece from falling.

[0003] CN201611062337.0 discloses an electromagnetic mechanical gripper with adjustable clamping force, comprising a left gripper, a right gripper, a left permanent magnet, a right permanent magnet, an electromagnet, a single-chip microcomputer and an electromagnet power supply circuit. The left gripper and the right gripper are connected to each other, have the same structure and are symmetrical on the left and right sides. The left permanent magnet is arranged below the left gripper, the right permanent magnet is arranged below the right gripper, the electromagnet is arranged between the left and right permanent magnets, the single-chip microcomputer is connected to the electromagnet power supply circuit, and the current on the electromagnet power supply circuit is adjustable.

[0004] The clamping force of the existing electromagnetic structure clamp cannot meet the needs of different production. The magnet drive structure has excessive force transmission loss, resulting in unstable clamping. When the structure is powered off, the clamp can be easily broken, resulting in poor clamping and pressure maintenance effect. Utility Model Content

[0005] The utility model aims to at least solve the technical problems existing in the prior art that "the clamping force of the existing electromagnetic structure clamp cannot meet the needs of different productions, the magnet drive structure has excessive force transmission loss resulting in unstable clamping, and the clamp is easily broken after the structure is powered off, resulting in poor clamping and pressure-maintaining effect." To this end, the utility model proposes an electromagnetic clamp that optimizes the force transmission path driven by the magnet, has a stronger clamping force, and meets more usage scenarios. The clamping and pressure-maintaining effect is better, and the clamp can effectively prevent loosening after power failure.

[0006] According to some embodiments of the present invention, the electromagnetic clamp comprises:

[0007] A clamping assembly, the clamping assembly comprising a clamping seat and two clamping claws slidably connected to the clamping seat;

[0008] A drive assembly, comprising a clamping drive part and a reversing drive part, wherein the clamping drive part is drivingly connected to the two clamping jaws, and the reversing drive part is magnetically connected to the clamping drive part, and two groups of permanent magnets are respectively arranged between the clamping drive part and the reversing drive part, and the permanent magnets of the clamping drive part and the reversing drive part correspond to each other one by one and the permanent magnets are arranged with an N pole and an S pole;

[0009] A commutation assembly is disposed below the commutation driving part. The commutation assembly is in transmission connection with the commutation driving part and is used to drive the commutation driving part to rotate;

[0010] When the magnetic poles of the permanent magnets of the commutation driving part are the same as those of the clamping driving part, the commutation driving part pushes the clamping driving part to eject and opens the clamping jaws; when the magnetic poles of the permanent magnets of the commutation driving part are opposite to those of the clamping driving part, the commutation driving part attracts the clamping driving part to retract and closes the clamping jaws.

[0011] According to some embodiments of the present invention, the clamping driving part includes a driving seat and a linkage seat disposed on the top of the driving seat. The linkage seat is hinged to the two clamping jaws. The driving seat is provided with at least one set of magnet mounting grooves, and the permanent magnets are embedded in the magnet mounting grooves. The linkage seat reciprocates under the action of magnetic force.

[0012] According to some embodiments of the present invention, a V-shaped transmission member is disposed between the clamping jaws and the linkage seat. One end of the V-shaped transmission member is connected to the clamping jaw, and the other end is hinged to the linkage seat; when the clamping driving part reciprocates, the V-shaped transmission member drives the two clamping jaws to approach or separate from each other with the middle as the axis.

[0013] According to some embodiments of the present invention, the commutation driving part includes a rotating seat. The inside of the rotating seat is provided with the magnet mounting grooves, and the permanent magnets are embedded in the magnet mounting grooves; the magnet mounting grooves of the driving seat respectively correspond to a set of the rotating seats, and each rotating seat is in transmission connection with the commutation assembly, and the commutation assembly drives each rotating seat to rotate synchronously.

[0014] According to some embodiments of the present invention, a transmission rod is disposed at the bottom of the rotating seat, and a transmission tooth is disposed at the end of the transmission rod. The transmission tooth is in transmission connection with the commutation assembly.

[0015] According to some embodiments of the present invention, the commutation assembly includes a motor and a transmission part. One end of the transmission part is in meshing transmission with the transmission tooth, and the other end is in transmission connection with the output shaft of the motor.

[0016] According to some embodiments of the present invention, the transmission part includes a driving tooth, a worm gear and a worm. The driving tooth is coaxially disposed with the worm gear and is in meshing with the transmission tooth. The worm gear is in meshing transmission with the worm, and the worm is in transmission connection with the motor.

[0017] According to some embodiments of the present invention, the driving tooth and the worm gear are integrally formed to form a double-layer gear structure.

[0018] According to some embodiments of the present invention, the permanent magnet adopts a columnar structure, the permanent magnet is provided with an N pole and an S pole with a rotating surface as the dividing line, and the permanent magnets of the clamping driving part and the commutation driving part are coaxially arranged.

[0019] According to some embodiments of the present invention, it includes a housing, the clamping seat is arranged at the top of the housing, the driving assembly and the commutation assembly are arranged inside the housing, the clamping driving part reciprocates in the housing to approach or move away from the clamping seat, and the commutation driving part is rotatably connected inside the housing.

[0020] The electromagnetic claw according to some embodiments of the present invention has at least the following beneficial effects: the clamping or opening of the claw is realized between the clamping driving part and the commutation driving part through the permanent magnet, and the commutation driving part changes the working state of the clamping driving part by rotating an angle. The commutation driving part is directly connected to and drives the commutation assembly, the clamping force control is more accurate, the power-off pressure holding effect of the claw is improved, and the loosening of the claw is avoided.

[0021] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a three-dimensional schematic diagram of the electromagnetic claw according to the embodiment of the present invention;

[0024] Figure 2 is a cross-sectional view of the electromagnetic claw according to the embodiment of the present invention;

[0025] Figure 3 is a first partial schematic diagram of the electromagnetic claw according to the embodiment of the present invention;

[0026] Figure 4 is a second partial schematic diagram of the electromagnetic claw according to the embodiment of the present invention;

[0027] Figure 5 is a third partial schematic diagram of the electromagnetic claw according to the embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of the permanent magnet of the electromagnetic claw according to the embodiment of the present invention.

[0029] Reference numerals:

[0030] The clamping assembly 100, the clamping seat 110, the clamping jaws 120, the V-shaped transmission member 130,

[0031] the driving assembly 200, the permanent magnet 201, the magnet mounting groove 202, the clamping driving portion 210, the linkage seat 211, the driving seat 212, the commutation driving portion 220, the rotating seat 221, the transmission rod 222, the transmission gear 223,

[0032] the commutation assembly 300, the motor 310, the transmission portion 320, the driving gear 321, the worm gear 322, the worm 323, and the housing 400. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, rear, left, right, top, bottom, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0037] Next, refer to Figures 1 - 3 to describe the electromagnetic clamping jaws according to the embodiments of the present invention.

[0038] As Figures 1 - 3 shown, the electromagnetic clamping jaws include three parts: a clamping assembly 100, a driving assembly 200, and a commutation assembly 300.

[0039] Specifically, the clamping assembly 100 includes a clamping seat 110 and two clamping jaws 120 slidably connected to the clamping seat 110. The clamping jaws 120 slide in the sliding groove of the clamping seat 110. The two clamping jaws 120 are close to each other to achieve the clamping function and are far away from each other to achieve the opening function. The electromagnetic clamp in this embodiment is a two-claw structure. In other embodiments, the clamping assembly 100 can also be a three-claw structure or a four-claw structure. It should be understood that without departing from the basic concept of the present invention, the number of clamping jaws 120 and the corresponding structure of the clamping seat 110 can be flexibly changed, and all should be regarded as within the protection scope defined by the present invention.

[0040] The drive assembly 200 includes a clamping drive unit 210 and a reversing drive unit 220, one end of the clamping drive unit 210 is transmission-connected to the two clamping jaws 120 of the clamping assembly 100. The other end of the clamping drive unit 210 is magnetically connected to the reversing drive unit 220, that is, the clamping drive unit 210 and the reversing drive unit 220 are brought close to or separated by magnetic field conversion. A permanent magnet 201 is respectively arranged between the clamping drive unit 210 and the reversing drive unit 220, and the permanent magnet 201 is provided with an N pole and an S pole, and the permanent magnets 201 between the two drive units have the same structure.

[0041] The reversing assembly 300 is disposed below the reversing drive unit 220, and the reversing assembly 300 is in transmission connection with the reversing drive unit 220, and is used to drive the reversing drive unit 220 to rotate. The reversing assembly 300 changes the direction of the permanent magnet 201 at the position of the reversing drive unit 220 by driving the reversing drive unit 220, while the position of the permanent magnet 201 in the clamping drive unit 210 remains fixed. When the direction of the permanent magnet 201 of the reversing drive unit 220 changes, the mutual force between the permanent magnets 201 of the two drive units will change, and the two states of repulsion of the same poles and attraction of the opposite poles can be switched to achieve the clamping or loosening of the clamping jaws 120.

[0042] When the magnetic poles of the permanent magnet 201 of the reversing drive unit 220 are the same as those of the permanent magnet 201 of the clamping drive unit 210, the reversing drive unit 220 pushes the clamping drive unit 210 out and opens the clamping jaws 120. When the magnetic poles of the permanent magnet 201 of the reversing drive unit 220 are opposite to those of the permanent magnet 201 of the clamping drive unit 210, the reversing drive unit 220 attracts the clamping drive unit 210 to retreat and clamp the clamping jaws 120.

[0043] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the clamping drive part 210 includes a driving seat 212 and a linkage seat 211 arranged on the top of the driving seat 212, the linkage seat 211 is hinged to the two clamping jaws 120, the driving seat 212 is provided with at least one group of magnet mounting grooves 202, the permanent magnet 201 is embedded in the magnet mounting groove 202, and the linkage seat 211 reciprocates under the action of magnetic force.

[0044] Specifically, the structure of the driving seat 212 is adjusted according to the number of permanent magnets 201, the linkage seat 211 and the driving seat 212 are integrally formed, and the driving seat 212 drives the clamping jaws 120 to clamp or open through the linkage seat 211. In this embodiment, two groups of permanent magnets 201 are provided, and correspondingly, the driving seat 212 is provided with two groups of magnet mounting grooves 202, and the permanent magnets 201 are fixed in the magnet mounting grooves 202. When the permanent magnets 201 are subjected to the magnetic force of the magnetic field change, the driving seat 212 will be driven to move, thereby realizing the movement of the clamping jaws 120.

[0045] Furthermore, if Figure 1 and Figure 2 As shown, a V-shaped transmission member 130 is provided between the clamping jaw 120 and the linkage seat 211, one end of the V-shaped transmission member 130 is connected to the clamping jaw 120, and the other end is hinged to the linkage seat 211. When the clamping drive part 210 reciprocates, the V-shaped transmission member 130 drives the two clamping jaws 120 to move closer to or away from each other with the middle part as the axis.

[0046] Specifically, the clamping jaw 120 slides along the sliding groove direction of the clamping seat 110, which is horizontal sliding, while the moving direction of the clamping drive part 210 is perpendicular to the reciprocating motion of the clamping seat 110, which is vertical motion. In order to convert the vertical motion of the clamping drive part 210 into the horizontal motion of the clamping jaw 120, this embodiment is achieved by setting a V-shaped transmission member 130. When the linkage seat 211 drives one end of the V-shaped transmission member 130 to rotate around the rotation center of the V-shaped transmission member 130, the other end of the V-shaped transmission member 130 will move the clamping jaw 120 so that the clamping jaw 120 slides along the sliding groove direction of the clamping seat 110. The V-shaped transmission member 130 can also adopt an L-shaped structure, a C-shaped structure or a U-shaped structure, etc. It should be understood that without departing from the basic concept of the utility model, the flexible change of the structure of the V-shaped transmission member 130 should be regarded as within the protection scope defined by the utility model.

[0047] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the reversing drive unit 220 includes a rotating seat 221, and a magnet mounting groove 202 is provided inside the rotating seat 221, and the permanent magnet 201 is embedded in the magnet mounting groove 202. The magnet mounting grooves 202 of the driving seat 212 correspond to a group of rotating seats 221, and each rotating seat 221 is respectively connected to the reversing assembly 300, and the reversing assembly 300 drives each rotating seat 221 to rotate synchronously.

[0048] Specifically, the distance between the rotating seat 221 and the clamping seat 110 is fixed. The rotating seat 221 can only rotate around its axis to change the pole position of the permanent magnet 201 in the magnet mounting groove 202. To improve the transmission effect of the interaction between the permanent magnets 201, the axis of the permanent magnet 201 is coaxially arranged with the axis of the rotating seat 221. The permanent magnets 201 between the rotating seat 221 and the driving seat 212 are all coaxially arranged, further improving the transmission efficiency.

[0049] In this embodiment, each rotating seat 221 is an independently arranged minimum unit. When two sets of permanent magnets 201 are used for the driving seat 212, two sets of rotating seats 221 are correspondingly arranged, and each set of rotating seats 221 is arranged corresponding to one of the permanent magnets 201 of the driving seat 212. According to actual production requirements, when an electromagnetic gripper with a stronger clamping force is needed, only the structure of the clamping driving part 210 needs to be changed, and the commutation driving part 220 adjusts the number of rotating seats 221 according to actual needs. The modular setting effectively reduces the manufacturing cost and improves the application range of the electromagnetic gripper.

[0050] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, a transmission rod 222 is provided at the bottom of the rotating seat 221, and a transmission tooth 223 is provided at the end of the transmission rod 222. The transmission tooth 223 is in transmission connection with the commutation assembly 300.

[0051] Specifically, the transmission rod 222 is integrally formed with the rotating seat 221. The transmission rod 222 and the transmission tooth 223 are coaxially arranged with the transmission seat. The commutation assembly 300 drives the transmission tooth 223 to change the angle of the permanent magnet 201 inside the rotating seat 221, and further changes the magnetic field relationship between the clamping driving part 210 and the commutation driving part 220, so that the gripper 120 can be opened or closed.

[0052] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the commutation assembly 300 includes a motor 310 and a transmission part 320. One end of the transmission part 320 is in meshing transmission with the transmission tooth 223, and the other end is in transmission connection with the output shaft of the motor 310.

[0053] Specifically, the motor 310 can be an ordinary motor 310 or a servo motor 310. In the state of using the servo motor 310, the rotation angle of the rotating seat 221 can be accurately adjusted, so as to adjust the position of the gripper 120. When an ordinary motor 310 is used, the rotating seat 221 rotates 180 degrees, so that the NS pole positions of the permanent magnets 201 between the two driving parts are interchanged, and the gripper 120 can be fully opened or clamped.

[0054] Furthermore, as Figure 1 and Figure 2As shown, the transmission part 320 includes a driving gear 321, a worm gear 322 and a worm 323. The driving gear 321 is coaxially arranged with the worm gear 322 and meshes with the transmission gear 223. The worm gear 322 meshes with the worm 323 for transmission, and the worm 323 is drivingly connected to the motor 310.

[0055] Specifically, the transmission between the worm gear 322 and the worm 323 can achieve a high reduction ratio, which can greatly reduce the output speed, thereby improving the angle adjustment accuracy of the rotating seat 221. The transmission between the worm gear 322 and the worm 323 has a small volume and weight, and is suitable for structures with limited space. Using the worm gear 322 and the worm 323 is beneficial to further reduce the volume of the electromagnetic gripper and achieve miniaturization. And the transmission between the worm gear 322 and the worm 323 can achieve a self-locking function to prevent the rotating seat 221 from rotating back under the action of magnetic force, resulting in the loosening of the gripper 120. That is, the worm gear 322 cannot drive the worm 323, thus preventing the loosening of the gripper 120 caused by the self-rotation of the rotating seat 221.

[0056] Furthermore, as Figure 1 and Figure 2 shown, the driving gear 321 and the worm gear 322 are integrally formed into a double-layer gear structure, which can improve the structural strength of the driving gear 321 and the worm gear 322 and enhance the transmission efficiency, and the synchronous transmission performance is better.

[0057] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the permanent magnet 201 adopts a columnar structure. The permanent magnet 201 is provided with an N pole and an S pole with the rotation surface as the demarcation line. The permanent magnets 201 of the clamping driving part 210 and the commutation driving part 220 are coaxially arranged.

[0058] Specifically, in this embodiment, the permanent magnet 201 adopts a square columnar structure. With the plane where the generatrix and the axis are located as the demarcation line, the N pole and the S pole each account for half of the volume. When the magnetic poles of the end faces of the permanent magnets 201 of the two driving parts are opposite, the clamping driving part 210 and the commutation driving part 220 are attracted. Since the axial position of the commutation driving part 220 is fixed, the clamping driving part 210 moves and synchronously drives the gripper 120 to clamp. When the magnetic poles of the end faces of the permanent magnets 201 of the two driving parts are the same, the clamping driving part 210 and the commutation driving part 220 repel each other, so the clamping driving part 210 moves and synchronously drives the gripper 120 to open.

[0059] In some embodiments of the present invention, as Figure 1 and Figure 2As shown, it includes a housing 400. A clamping seat 110 is arranged at the top of the housing 400. A driving assembly 200 and a commutation assembly 300 are arranged inside the housing 400. A clamping driving part 210 reciprocates in the housing 400 to approach or move away from the clamping seat 110, and a commutation driving part 220 is rotatably connected inside the housing 400.

[0060] Specifically, the commutation driving seat 212 is rotatably connected to the housing 400 through a bearing, so that the rotation of the commutation driving seat 212 is smoother. The electromagnetic gripper in this embodiment adopts a longitudinal layout, which can reduce the lateral volume occupation of the electromagnetic gripper, so as to adapt to more usage environments.

[0061] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electromagnetic gripper, characterized in that: include: A clamping assembly (100), the clamping assembly (100) comprising a clamping seat (110) and two clamping claws (120) slidably connected to the clamping seat (110); A drive assembly (200) comprises a clamping drive unit (210) and a reversing drive unit (220), wherein the clamping drive unit (210) is transmission-connected to the two clamping jaws (120), and the reversing drive unit (220) is magnetically connected to the clamping drive unit (210), and two groups of permanent magnets (201) are respectively arranged between the clamping drive unit (210) and the reversing drive unit (220), and the permanent magnets (201) of the clamping drive unit (210) and the reversing drive unit (220) correspond one to one, and the permanent magnets (201) are provided with an N pole and an S pole; A reversing assembly (300) is disposed below the reversing drive unit (220); the reversing assembly (300) is in driving connection with the reversing drive unit (220) and is used to drive the reversing drive unit (220) to rotate; When the magnetic poles of the permanent magnet (201) of the reversing drive unit (220) are the same as the magnetic poles of the permanent magnet (201) of the clamping drive unit (210), the reversing drive unit (220) pushes the clamping drive unit (210) out and causes the clamping jaw (120) to open; when the magnetic poles of the permanent magnet (201) of the reversing drive unit (220) are opposite to the magnetic poles of the permanent magnet (201) of the clamping drive unit (210), the reversing drive unit (220) attracts the clamping drive unit (210) to retreat and causes the clamping jaw (120) to clamp.

2. The electromagnetic clamp according to claim 1, characterized in that: The clamping drive part (210) comprises a driving seat (212) and a linkage seat (211) arranged on the top of the driving seat (212); the linkage seat (211) is hinged to the two clamping claws (120); the driving seat (212) is provided with at least one group of magnet installation grooves (202); the permanent magnet (201) is embedded in the magnet installation grooves (202); and the linkage seat (211) reciprocates under the action of magnetic force.

3. The electromagnetic clamp according to claim 2, characterized in that: A V-shaped transmission member (130) is provided between the clamping jaw (120) and the linkage seat (211), one end of the V-shaped transmission member (130) is connected to the clamping jaw (120), and the other end is hinged to the linkage seat (211); When the clamping drive part (210) reciprocates, the V-shaped transmission member (130) drives the two clamping jaws (120) to move closer to or farther from each other with the middle part as the axis.

4. The electromagnetic clamp according to claim 2, characterized in that: The reversing drive unit (220) comprises a rotating seat (221), the rotating seat (221) is provided with the magnet installation groove (202) inside, and the permanent magnet (201) is embedded in the magnet installation groove (202); The magnet mounting grooves (202) of the driving seat (212) respectively correspond to a group of rotating seats (221), and each rotating seat (221) is respectively connected to the reversing assembly (300) in a transmission manner, and the reversing assembly (300) drives each rotating seat (221) to rotate synchronously.

5. The electromagnetic clamp according to claim 4, characterized in that: A transmission rod (222) is provided at the bottom of the rotating seat (221), and a transmission tooth (223) is provided at the end of the transmission rod (222), and the transmission tooth (223) is transmission-connected to the reversing assembly (300).

6. The electromagnetic clamp according to claim 5, characterized in that: The reversing assembly (300) comprises a motor (310) and a transmission part (320); one end of the transmission part (320) is meshed with the transmission teeth (223) for transmission, and the other end is transmission-connected to the output shaft of the motor (310).

7. The electromagnetic clamp according to claim 6, characterized in that: The transmission part (320) comprises a power tooth (321), a worm wheel (322) and a worm (323); the power tooth (321) is coaxially arranged with the worm wheel (322) and meshes with the transmission tooth (223); the worm wheel (322) meshes with the worm (323) for transmission; and the worm (323) is transmission-connected with the motor (310).

8. The electromagnetic clamp according to claim 7, characterized in that: The power tooth (321) and the worm gear (322) are integrally formed to form a double-layer gear structure.

9. The electromagnetic clamp according to claim 1, characterized in that: The permanent magnet (201) adopts a columnar structure, and the permanent magnet (201) is provided with an N pole and an S pole with the rotation plane as a dividing line. The permanent magnet (201) of the clamping drive part (210) and the permanent magnet (201) of the commutation drive part (220) are coaxially arranged.

10. The electromagnetic clamp according to claim 1, characterized in that: The invention comprises a shell (400), wherein the clamping seat (110) is arranged on the top of the shell (400), the driving assembly (200) and the reversing assembly (300) are arranged inside the shell (400), the clamping driving part (210) reciprocates in the shell (400) to approach or move away from the clamping seat (110), and the reversing driving part (220) is rotatably connected in the shell (400).

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