Swing motor, electric device and assembly method

Abstract

The invention belongs to the technical field of motors, and particularly relates to a swing motor, an electric device and an assembly method.In the swing motor, a stator mechanism comprises a first coil, a second coil and a first magnet yoke, a rotor mechanism comprises a swing arm frame, a first permanent magnet set and a second permanent magnet set, and a main body support is sequentially provided with a stator placing position and a rotor placing position; the stator placing position is provided with a positioning protruding block, the stator mechanism is installed on the stator placing position, and the positioning protruding block is connected with the supporting seat in a hanging mode. And the swing arm frame is rotationally arranged on the rotor placing position. According to the swing motor, the assembly operation is simple, the air gap between the rotor mechanism and the stator mechanism can be accurately controlled by controlling the distance between the positioning convex block and the rotor placing position, the size of the air gap is not influenced by magnetic pulling force any more, and the consistency of the air gap is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a swing motor, an electric device and an assembly method. Background Art

[0002] A motor is an electromagnetic device that converts electrical energy according to the law of electromagnetic induction. It is widely used in various fields and is an indispensable prime mover in today's society, providing power for a large number of electrical appliances or various machines. A swing motor is a motor that can achieve high-frequency swing and is widely used in electric shavers, electric brushes and other equipment.

[0003] The applicant has found that the technology also provides a swing motor (application number: 201610095990.0, patent name: swing motor and electric hair clipper). This kind of swing motor generally uses permanent magnets with strong magnetism (such as neodymium iron boron), and a certain gap is required between the permanent magnet and the stator yoke so that the stator assembly can drive the permanent magnet to swing after power is turned on. A large magnetic attraction will be generated between the permanent magnet and the stator yoke. In order to ensure the gap between the permanent magnet and the stator yoke, in the prior art, an auxiliary spacer is usually inserted between the permanent magnet and the stator yoke. After the assembly is completed, the auxiliary spacer is pulled out with force. This kind of swing motor has difficulties in assembly operation. There is a gap in the screw fixation, and it is difficult to ensure the consistency of the air gap. Moreover, under the strong magnetic pulling force between the permanent magnet and the stator yoke, the main bracket of the swing motor is also prone to slowly deforming. Summary of the invention The embodiments of the present invention provide a swing motor, an electric device and an assembly method to solve the technical problems in the prior art that the swing motor has difficulty in assembly operation and difficulty in ensuring air gap consistency.

[0004] An embodiment of the present invention provides a swing motor, comprising a stator mechanism, a mover mechanism and a main body bracket; The stator mechanism includes a first coil, a second coil and a first magnetic yoke; the first magnetic yoke includes a support seat and a first leg and a second leg connected to the support seat at intervals; the first magnetic yoke is formed of a magnetic conductive material and has a U-shaped structure; the first coil is sleeved on the first leg, and the second coil is sleeved on the second leg; The mover mechanism includes a swing arm frame, a swing shaft, a first permanent magnet group and a second permanent magnet group; the swing arm frame is formed of a magnetic conductive material; one end of the swing arm frame close to the first magnetic yoke is used as a permanent magnet yoke, and the end of the swing arm frame away from the first magnetic yoke is rotatably mounted on the swing shaft; the first permanent magnet group is arranged corresponding to the first leg, and the second permanent magnet group is arranged corresponding to the second leg; the first permanent magnet group includes a first permanent magnet and a second permanent magnet installed at intervals on the permanent magnet yoke, and the second permanent magnet group includes a third permanent magnet and a fourth permanent magnet installed at intervals on the permanent magnet yoke, the end faces of the first permanent magnet and the second permanent magnet corresponding to the first leg have opposite polarities, the end faces of the third permanent magnet and the fourth permanent magnet corresponding to the second leg have opposite polarities, and the end face polarity of the first permanent magnet corresponding to the first leg is the same as the end face polarity of the fourth permanent magnet corresponding to the second leg; The stator placement position and the mover placement position are sequentially arranged on the main support; a positioning protrusion is arranged on the stator placement position, and the support seat is hung on the positioning protrusion; an axis hole is arranged on the mover placement position; the swing shaft is installed on the axis hole, and the swing arm frame is rotatably installed on the mover placement position.

[0005] Optionally, the swing motor also includes a first elastomer and a second elastomer; a first arc groove and a second arc groove are provided on the main body bracket; the first elastomer is installed in the first arc groove, and the second elastomer is installed in the second arc groove, and the first elastomer and the second elastomer are respectively abutted against opposite sides of the swing arm bracket.

[0006] Optionally, the first elastic body comprises a first cylinder, and a plurality of first side grooves spaced circumferentially are provided on the side wall of the first cylinder; The second elastic body comprises a second cylinder, and a plurality of second side grooves spaced apart in the circumferential direction are arranged on the side wall of the second cylinder.

[0007] Optionally, a first vertical side wall is provided on both sides of the stator placement position, and a second vertical side wall is provided on both sides of the mover placement position, one end of the second vertical side wall is connected to the first vertical side wall, and the other end of the second vertical side wall is connected to the groove walls of the first arc groove and the second arc groove.

[0008] Optionally, the main body bracket is also provided with reinforcing ribs, and the reinforcing ribs separate the stator placement position into a first placement position and a second placement position, the first coil is located in the placement position, and the second coil is located in the placement position; the positioning protrusion is arranged on the reinforcing rib, and the positioning protrusion is provided with a positioning surface that is hung with the support seat.

[0009] Optionally, the swing motor further comprises a pressure plate and a cover plate; the pressure plate is integrally mounted on the main bracket and abuts against the swing shaft; the cover plate is mounted on the main bracket and is used to press the first support leg and the second support leg tightly onto the stator placement position.

[0010] Optionally, the swing motor further comprises an output lever mounted on the swing arm frame, and the output lever is provided with a force output portion; The force output portion includes a first arc-shaped convex portion and a second arc-shaped convex portion arranged on opposite sides of the swing arm frame, the axis of the first arc-shaped convex portion coincides with the circular axis of the second arc-shaped convex portion, and the axis of the first arc-shaped convex portion is parallel to the swing axis.

[0011] Optionally, the first permanent magnet group further includes a fifth permanent magnet mounted on the permanent magnet yoke, and the fifth permanent magnet is located between the first permanent magnet and the second permanent magnet; The polarity of the end surface of the fifth permanent magnet facing one end of the first permanent magnet is the same as the polarity of the end surface of the first permanent magnet, and the polarity of the end surface of the fifth permanent magnet facing one end of the second permanent magnet is the same as the polarity of the end surface of the second permanent magnet; The second permanent magnet group further includes a sixth permanent magnet mounted on the permanent magnet yoke, and the sixth permanent magnet is located between the third permanent magnet and the fourth permanent magnet; The polarity of the end surface of the sixth permanent magnet facing the third permanent magnet is the same as that of the third permanent magnet, and the polarity of the end surface of the sixth permanent magnet facing the fourth permanent magnet is the same as that of the fourth permanent magnet.

[0012] An embodiment of the present invention further provides an electric device, comprising an actuator, a gear adjustment mechanism and the above-mentioned swing motor; The gear adjustment mechanism comprises a wrench, a shaft, an elastic clamping needle assembly, an output connecting rod, a sector-shaped body provided with a plurality of concave and convex tooth grooves, and a connecting piece provided with a guide hole; the sector-shaped body is arranged on the shaft and provided with a convex cylinder, the output connecting rod is slidably installed in the guide hole and is rotatably connected with the convex cylinder; the elastic clamping needle assembly is installed on the connecting piece, and the needle head on the elastic clamping needle assembly touches one of the concave and convex tooth grooves; the connecting piece is installed on the main bracket; The shaft is rotatably installed between the main support and the connecting piece; the actuator is slidably or rotatably arranged on the outside of the main support and contacts the output connecting rod and the swing arm frame; the output connecting rod is used to drive the actuator to move on the outside of the main support.

[0013] An embodiment of the present invention further provides an assembly method, which is applied to the above-mentioned swing motor and is characterized by comprising: Install the swing shaft in the shaft hole, and rotatably install the swing arm frame on the swing shaft; The stator mechanism is installed on the stator placement position from the end away from the mover placement position, and due to the magnetic attraction between the first leg and the first permanent magnet group, and the magnetic attraction between the second leg and the second permanent magnet group, the stator mechanism moves toward the mover mechanism until the support seat is hung on the positioning protrusion; The stator mechanism is fixed on the main body bracket.

[0014] In the present invention, a stator placement position and a mover placement position connected to the stator placement position are sequentially provided on the main support, the stator placement position is provided with a positioning protrusion, and the support seat is hung on the positioning protrusion; an axis hole is provided on the mover placement position, the swing shaft is installed in the axis hole, and the swing arm frame is rotatably installed on the swing shaft. Specifically, firstly, the swing shaft is installed in the shaft hole of the mover placement position, and then the swing arm frame is rotated and installed on the swing shaft, so that the swing arm frame is rotated and installed on the mover placement position, and the first permanent magnet group and the second permanent magnet group are installed on the end of the swing arm frame facing the stator placement position; thereafter, in the process of pushing the stator assembly from the end of the stator placement position away from the mover placement position to the mover placement position, due to the magnetic attraction of the first permanent magnet group on the first leg and the magnetic attraction of the second permanent magnet group on the second leg, the stator mechanism moves toward the mover mechanism until the support seat is hung on the positioning protrusion; finally, the stator mechanism is fixed on the stator placement position by fasteners such as screws. The assembly operation of the swing motor is simple, and by controlling the distance between the positioning protrusion and the mover placement position, the air gap between the mover mechanism and the stator mechanism can be accurately controlled, so that the air gap size is no longer affected by the magnetic pull, and the consistency of the air gap is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0016] Figure 1 is a structural schematic diagram of a swing motor provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a main body bracket of a swing motor provided by an embodiment of the present invention; Figure 3It is a schematic diagram of a partial exploded structure of a swing motor provided by an embodiment of the present invention; Figure 4 is a schematic diagram of a swing motor provided by an embodiment of the present invention; Figure 5 is a schematic diagram of a swing motor provided by an embodiment of the present invention; Figure 6 It is a partial structural schematic diagram of an electric device provided by an embodiment of the present invention; Figure 7 is a structural schematic diagram of an adjustment mechanism of an electric device provided in one embodiment of the present invention; Figure 8 It is a schematic diagram of an exploded structure of an adjusting mechanism of an electric device provided by an embodiment of the present invention; Fig. 9 is a schematic structural diagram of an electric device provided by an embodiment of the present invention; Fig.10 Is a schematic diagram of the structure of an electric device provided in one embodiment of the present invention; Fig.11 It is a force curve diagram of an elastomer without side grooves, a spring and an elastomer with side grooves provided in one embodiment of the present invention.

[0017] The reference numerals in the specification are as follows: 1. stator mechanism; 11. first coil; 12. second coil; 13. first yoke; 131. support seat; 1311. second fastening hole; 132. first leg; 133. second leg; 14. fastener; 2. mover mechanism; 21. swing arm frame; 211. permanent magnet yoke; 22. first permanent magnet group; 221. first permanent magnet; 222. second permanent magnet; 223. fifth permanent magnet; 23. second permanent magnet group; 231. third permanent magnet; 232. fourth permanent magnet; 233. sixth permanent magnet; 24. swing shaft; 3. main frame; 31. stator placement; 311. first placement; 312. second placement; 313. first vertical side wall; 32. mover placement; 321, second vertical side wall; 33, positioning protrusion; 34, reinforcing rib; 35, mounting groove; 36, first fastening hole; 37, first circular arc groove; 38, second circular arc groove; 39, shaft hole; 301, hollow hole; 302, third semi-circular arc groove 4, first elastic body; 41, first side groove; 5, second elastic body; 51, second side groove; 62, pressure plate; 63, cover plate; 64, output lever; 641, force output part; 7, adjustment mechanism; 71, wrench; 72, shaft body; 73, elastic card needle assembly; 74, output connecting rod; 75, fan-shaped body; 751, concave and convex tooth groove; 752, convex column; 76, support frame; 761, guide hole; 762, fourth semi-circular arc groove; 8, actuator. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a swing motor, comprising a stator mechanism 1, a mover mechanism 2 and a main body bracket 3; like Figure 3 and Figure 4As shown, the stator mechanism 1 includes a first coil 11, a second coil 12 and a first yoke 13, the first yoke 13 includes a support seat 131 and a first leg 132 and a second leg 133 connected to the support seat 131 at intervals; the first yoke 13 is formed of a magnetic conductive material and has a U-shaped structure; the first coil 11 is sleeved on the first leg 132, and the second coil 12 is sleeved on the second leg 133; the first coil 11 and the second coil 12 are both composed of a plastic hollow bracket and an enameled wire wound on the hollow bracket; the first yoke 13 is U-shaped, formed of a magnetic conductive material, and can be formed by stamping and riveting silicon steel sheets. Because the magnetic circuit is similar to a square frame and does not need to rotate, the silicon steel sheet can be an oriented silicon steel sheet. The oriented silicon steel sheet has low iron loss and high magnetic induction intensity, which can reduce the amount of copper wire used. Preferably, the support seat 131 , the first support leg 132 and the second support leg 133 are an integrally formed part and have a U-shaped structure, that is, the first magnetic yoke 13 is a U-shaped magnetic yoke.

[0022] like Figure 3 and Figure 4As shown, the mover mechanism 2 includes a swing arm frame 21, a swing shaft 24, a first permanent magnet group 22 and a second permanent magnet group 23; the swing arm frame 21 is formed of a magnetic conductive material, and the end close to the first magnetic yoke 13 is used as a permanent magnet yoke 211, and the permanent magnet yoke 211 is installed with the first permanent magnet group 22 and the second permanent magnet group 23. The end of the swing arm frame 21 away from the first magnetic yoke 13 is provided with a swing shaft hole, and the swing arm frame 21 is rotatably installed on the swing shaft 24; the first permanent magnet group 22 is arranged corresponding to the first support leg 132, and the second permanent magnet group 23 is arranged corresponding to the second support leg 133; the first permanent magnet group 22 includes a permanent magnet group 22 installed at intervals on the permanent magnet The first permanent magnet 221 and the second permanent magnet 222 on the yoke 211, the second permanent magnet group 23 includes a third permanent magnet 231 and a fourth permanent magnet 232 installed at intervals on the permanent magnet yoke 211, the end surface polarities of the first permanent magnet 221 and the second permanent magnet 222 corresponding to the first leg 132 are opposite, the end surface polarities of the third permanent magnet 231 and the fourth permanent magnet 232 corresponding to the second leg 133 are opposite, the end surface polarity of the first permanent magnet 221 corresponding to the first leg 132 is the same as the end surface polarity of the fourth permanent magnet 232 corresponding to the second leg 133; it can be understood that the end surface polarity refers to the polarity of the permanent magnet toward one end of the leg. Furthermore, with the swing shaft 24 as the dividing point, the swing arm frame 21 is divided into two sections, namely an inner arm and an outer arm; the inner arm is a section of the swing arm frame 21 close to the first yoke 13 (the end is the permanent magnet yoke 211), and the outer arm is another section of the swing arm frame 21 away from the first yoke 13; the first permanent magnet group 22 and the second permanent magnet group 23 are both installed on the end of the inner arm close to the first yoke 13 (that is, the permanent magnet yoke 211); the outer arm can be used as the output part of the swing motor, or an output lever 64 can be installed on the outer arm to serve as the output part.

[0023] In a specific embodiment, a first arc surface is provided at one end of the first leg 132 away from the support seat 131, and a second arc surface is provided at one end of the second leg 133 away from the support seat 131, and the first arc surface and the second arc surface both take the swing shaft 24 as the center; the first permanent magnet 221, the second permanent magnet 222, the third permanent magnet 231 and the fourth permanent magnet 232 are distributed on the same circumference with the swing shaft 24 as the center; it can be understood that the end faces of the first permanent magnet 221, the second permanent magnet 222, the third permanent magnet 231 and the fourth permanent magnet 232 are opposite to the axis of the swing shaft 24.

[0024] like Figure 1 and Figure 2As shown, the main body support 3 is provided with a stator placement position 31 and a mover placement position 32 in sequence, the stator placement position 31 is provided with a positioning protrusion 33, and the support seat 131 is hung on the positioning protrusion 33; the mover placement position 31 is provided with an axis hole 39, the swing axis 24 is installed in the axis hole 39, and the swing arm frame 21 is rotatably installed on the swing axis 24. It can be understood that the positioning protrusion 33 protrudes toward the top of the stator placement position 31; the stator placement position 31 and the mover placement position 32 both include but are not limited to a receiving groove, a mounting surface, etc.

[0025] In the present invention, a stator placement position 31 and a mover placement position 32 connected to the stator placement position 31 are sequentially provided on the main support 3, the stator placement position 31 is provided with a positioning protrusion 33, and the support seat 131 is hung on the positioning protrusion 33; the mover placement position 31 is provided with an axis hole 39, the swing shaft 24 is installed in the axis hole 39, and the swing arm frame 21 is rotatably installed on the swing shaft 24 and is located at the mover placement position 31. Specifically, first, the swing shaft 24 is installed in the shaft hole 39 of the mover placement position 31, and then the swing arm frame 21 is rotatably installed on the swing shaft 24, so that the swing arm frame 21 is rotatably installed on the mover placement position 32, and the first permanent magnet group 22 and the second permanent magnet group 23 are installed on the permanent magnet yoke 211 of the swing arm frame 21 at one end facing the stator placement position 31; thereafter, in the process of pushing the stator assembly from the end of the stator placement position 31 away from the mover placement position 32 to the mover placement position 32, due to the magnetic attraction of the first permanent magnet group 22 on the first leg 132 and the magnetic attraction of the second permanent magnet group 23 on the second leg 133, the stator mechanism 1 moves toward the mover mechanism 2 until the support seat 131 is hung on the positioning protrusion 33; finally, the stator mechanism 1 is fixed to the stator placement position 31 using fasteners such as screws. The assembly operation of the swing motor is simple, and by controlling the distance between the positioning protrusion 33 and the mover placement position 32, the air gap between the mover mechanism 2 and the stator mechanism 1 (that is, the air gap between the first permanent magnet group 22 and the second permanent magnet group 23 and the first magnetic yoke 13) can be accurately controlled, so that the air gap size is no longer affected by the magnetic pull, and the consistency of the air gap is guaranteed, thereby ensuring the consistency of the swing motor.

[0026] In one embodiment, if Figure 2As shown, a reinforcing rib 34 is provided on the inner wall of the stator placement position 31, and the reinforcing rib 34 divides the stator placement position 31 into a first placement position 311 and a second placement position 312. The first coil 11 is located in the first placement position 311, and the second coil 12 is located in the second placement position 312. It can be understood that the reinforcing rib 34 extends along the front-to-back direction of the stator placement position 31, and can extend to the bottom surface of the mover placement position 32 until the swing shaft 24, so as to enhance the strength of the main support 3. The first placement position 311 and the second placement position 312 are respectively located on the left and right sides of the reinforcing rib 34. In a specific embodiment, as Fig. 9 As shown, the reinforcing rib 34 passes through the bottom surface of the main support 3 ; it can be understood that the reinforcing rib 34 passes through longitudinally and is located on the center line of the main support 3 , thereby enhancing the strength and rigidity of the main support 3 .

[0027] The positioning protrusion 33 is arranged on the reinforcing rib 34, and the positioning protrusion 33 is provided with a positioning surface which is hung with the support seat 131; optionally, the positioning protrusion 33 protrudes above the reinforcing rib 34, and the positioning surface is arranged on the side of the positioning protrusion 33; when the support seat 131 is hung on the positioning protrusion 33, the positioning surface abuts (hangs) with the support seat 131, thereby playing a role in limiting the first yoke 3.

[0028] The main support 3 is also provided with a mounting groove 35, which is connected to the end of the stator placement position 31 away from the mover placement position 32, and the bottom surface of the mounting groove 35 is a stator mounting surface perpendicular to the positioning surface; it can be understood that the positioning surface is manufactured based on the stator mounting surface, which can ensure the perpendicular relationship between the positioning surface and the stator mounting surface.

[0029] Specifically, when the stator mechanism 1 is installed in the stator placement position 31 through the installation slot 35, the positioning protrusion 33 slides relatively in the gap between the first coil 11 and the second coil 12 until the support seat 131 is hooked on the positioning surface of the positioning protrusion 33. At this time, the first coil 11 is located in the first placement position 311, and the second coil 12 is located in the second placement position 312. In this embodiment, the design of the reinforcing rib 34 improves the strength and rigidity of the main frame 3, so that the main frame 3 is not easily deformed under strong magnetic attraction; the design of the installation slot 35 further improves the convenience of assembling the swing motor.

[0030] In one embodiment, if Figure 2As shown, first vertical side walls 313 are provided on both sides of the stator placement position 31, and second vertical side walls 321 are provided on both sides of the mover placement position 32. One end of the second vertical side wall 321 is connected to the first vertical side wall 313, and the other end of the second vertical side wall 321 is connected to the groove walls of the first arc groove 37 and the second arc groove 38. It can be understood that the first vertical side walls 313 are provided on the left and right sides of the stator placement position 31, and the second vertical side walls 321 are provided on the left and right sides of the mover placement position 32; the design of the first vertical side wall 313 makes the stator placement position 31 a first receiving groove; the design of the second vertical side wall 321 makes the mover placement position 32 a second receiving groove connected to the first receiving groove; the design of the first receiving groove ensures the stability of the stator mechanism 1 installed in the positioning placement position 31; the design of the second receiving groove ensures the stability of the mover mechanism 2 installed in the mover placement position 32.

[0031] In one embodiment, the main frame 3 is preferably made of metal die-casting such as zinc alloy or aluminum alloy. Figure 2 As shown, the main support 3 is also provided with a plurality of hollow holes 301 connected to the mover placement position 32, and the hollow holes 301 are arranged opposite to the first permanent magnet group 22 and the second permanent magnet group 23. It can be understood that during the high-frequency swinging process of the first permanent magnet group 22 and the second permanent magnet group 23 on the mover placement position 32, the change of the magnetic field will cause the metal bottom wall of the first permanent magnet group 22 and the second permanent magnet group close to the swinging of the mover placement position 32 to generate eddy current heating. The setting of the hollow holes 301 can reduce the eddy current heat generation and allow the heat to be dissipated to the external environment through the hollow holes 301. In addition, due to the use of metal die-casting such as zinc alloy or aluminum alloy, the first vertical side wall 313 and the second vertical side wall 321 arranged on the stator placement position 31 and the mover placement position 32 close to the first yoke 13 and the permanent magnet yoke 211 not only enhance the strength of the main support 3, but also play the role of electromagnetic shielding.

[0032] In one embodiment, if Figures 1 to 3As shown, the stator mounting position 31 is provided with a first fastening hole 36, the support seat 131 is provided with a second fastening hole 1311, and the stator mechanism 1 further includes a fastener 14 inserted in the first fastening hole 36 and the second fastening hole 1311. It can be understood that the first fastening hole 36 and the second fastening hole 1311 both include but are not limited to threaded holes, etc., and the fastener 14 includes but is not limited to screws, bolts, etc. Specifically, after the support seat 131 is hung on the positioning protrusion 33, the fastener 14 inserted in the first fastening hole 36 and the second fastener 14 is used to fix the stator mechanism 1 on the stator placement position 31, thereby ensuring the stability of the stator mechanism 1 installed in the stator placement position 31.

[0033] In one embodiment, if Figures 2 to 4 As shown, the swing motor further includes a first elastic body 4 and a second elastic body 5; the main body bracket 3 is further provided with a first arc groove 37 and a second arc groove 38; the first elastic body 4 is installed in the first arc groove 37, and the second elastic body 5 is installed in the second arc groove 38, and the first elastic body 4 and the second elastic body 5 are respectively abutted against opposite sides of the swing arm bracket 21. It can be understood that the first arc groove 37 and the second arc groove 38 are symmetrically arranged on opposite sides of the mover placement position 32. Specifically, during the left and right swinging of the swing arm frame 21, the swing arm frame 21 will compress the first elastomer 4 or the second elastomer 5; when the swing arm frame 21 has not swung to the extreme position, the compression amount of the first elastomer 4 or the second elastomer 5 is small, so that the reaction force of the first elastomer 4 or the second elastomer 5 is small, and the first elastomer 4 or the second elastomer 5 has little effect on the swinging of the swing arm frame 21; when the swing arm frame 21 swings to the extreme position, the compression amount of the first elastomer 4 or the second elastomer 5 increases rapidly, so that the reaction force of the first elastomer 4 or the second elastomer 5 increases rapidly, and then the first elastomer 4 or the second elastomer 5 can prevent the swing arm frame 21 from over-swinging, and at the same time, when swinging in the opposite direction, the compressive potential energy of the elastic body (the first elastomer 4 or the second elastomer 5) will be released to increase the swinging torque.

[0034] In one embodiment, if Figure 3As shown, the first elastic body 4 includes a first cylinder, and a plurality of first side grooves 41 distributed circumferentially are provided on the side wall of the first cylinder; it can be understood that the design of the first side grooves 41 makes the first elastic body 4 have a smaller effect on the swing arm frame 21 in the middle position of the swing amplitude, and the pressure on the swing arm frame 21 is also within a suitable range, so that the swing shaft 24 will not exert a large pressure on the bearing sleeved thereon, thereby extending the service life of the inverted swing motor.

[0035] The second elastic body 5 includes a second cylinder, and a plurality of second side grooves 51 are arranged on the side wall of the second cylinder at intervals in the circumferential direction. It can be understood that the design of the second side grooves 51 makes the second elastic body 5 have a smaller influence on the swing arm frame 21 at the middle position of the swing amplitude, and the pressure on the swing arm frame 21 is also within a suitable range, so that the swing shaft 24 does not exert a large pressure on the bearing sleeved thereon, thereby extending the service life of the inverted swing motor. That is, the reaction force of the elastic body (i.e., the pressure on the swing arm frame 21) is related to the deformation amount and deformation filling space of the elastic body. Due to the existence of multiple side grooves, during the extrusion process, the deformation amount in the front is small, the deformation filling space is large, and the reaction force is small. The deformation amount in the back increases rapidly, the deformation filling space becomes smaller, and the reaction force increases rapidly. The reaction force curve is nonlinear. Compared with the elastic body without side grooves, such a reaction force curve is more reasonable, that is, the influence on the swing arm frame 21 at the middle position of the swing amplitude is smaller, and the pressure on the bearing is not too large.

[0036] Furthermore, if Fig.11 As shown in FIG. 1 , there are force curves of a spring, a smooth cylindrical elastic body without side grooves, and a plum blossom-shaped cylindrical elastic body with side grooves, and the three deformation forms; Fig.11 , 100 is the compression curve of the spring, 200 is the compression curve of the smooth cylindrical elastic body, and 300 is the compression curve of the plum blossom-shaped cylindrical elastic body with side grooves. The force of the spring is linear, while the force of the smooth cylindrical elastic body and the plum blossom-shaped cylindrical elastic body is nonlinear. The plum blossom-shaped cylindrical elastic body has a smaller effect on the swing arm in the middle of the swing amplitude, and the pressure at the maximum compression point is also between the first two, not too small, nor too large to put too much pressure on the bearing.

[0037] In one embodiment, if Figure 1 and Figure 2As shown, the swing motor also includes a pressure plate 62 and a cover plate 63. The swing arm frame 21 is rotatably mounted on the mover placement position 32 through the swing shaft 24 inserted in the shaft hole 39; the pressure plate 62 is installed on the main body bracket 3 and abuts against the swing shaft 24; the cover plate 63 is installed on the main body bracket 3, and is used to press the first support leg 132 and the second support leg 133 on the stator placement position 31 to prevent the support leg from vibrating and generating noise, and at the same time cover the first arc groove 37 and the second arc groove 38 for placing the elastic body to prevent the elastic body from coming out. It can be understood that the pressure plate 62 plays the role of pressing the swing shaft 24 into the mover placement position 32, ensuring the stability of the swing arm frame 21 rotating around the swing shaft 24. In addition, the cover plate 63 presses the first support leg 132 and the second support leg 133 on the stator placement position 31 to prevent the support leg from vibrating, and the cover plate 63 also. The first arc groove 37 and the second arc groove 38 are covered to ensure that the first elastic body 4 and the second elastic body 5 will not escape; the cover plate 63 may also be provided with ribs to enhance the strength of the cover plate 63. Furthermore, the cover plate may be replaced by a protruding body in the housing of the application appliance corresponding to the position of the support foot and the elastic body, to press the support foot and block the elastic body from coming out.

[0038] In one embodiment, if Figure 1 and Figure 3 As shown, the swing motor also includes an output lever 64 mounted on the swing arm frame 21, and a force output portion 641 is provided on the output lever 64. It can be understood that the force output portion 641 includes a first arc-shaped convex portion and a second arc-shaped convex portion arranged on opposite sides of the swing arm frame 21, the axis of the first arc-shaped convex portion and the circular axis of the second arc-shaped convex portion coincide, and the axis of the first arc-shaped convex portion is parallel to the swing shaft 24. In the embodiment, the swing arm frame 21 drives the actuator 8 to swing through the output lever 64, and the detachable design of the output lever 64 extends the length of the swing arm frame 21, and facilitates a more free design, meeting the swing drive requirements of more forms of actuators 8.

[0039] like Figure 4 As shown in the figure, the magnetic circuit of the swing motor is described (the magnetic polarities N and S marked in the figure are the end surface polarities of the permanent magnet corresponding to the yoke legs): When the first coil 11 and the second coil 12 are driven by positive and negative pulses, the swing arm frame 21 is driven to swing around the swing shaft 24. Figure 4(a) and (b) are switched between the two magnetic circuits. When the first coil 11 and the second coil 12 are energized, the four permanent magnets will generate torques in the same direction of rotation. If the first permanent magnet 221 and the third permanent magnet 231 generate the same magnetic attraction force on the first magnetic yoke 13 after power is turned on, the second permanent magnet 222 and the fourth permanent magnet 232 generate the same magnetic repulsion force on the first magnetic yoke 13; when the power is turned on in the reverse direction, the first permanent magnet 221 and the third permanent magnet 231 generate the same magnetic repulsion force on the first magnetic yoke 13, and the second permanent magnet 222 and the fourth permanent magnet 232 generate the same magnetic attraction force on the first magnetic yoke 13. That is, during each swing of the swing arm frame 21, the four permanent magnets are actually subjected to the force of swinging in the same direction, and the electromagnetic driving force = F1 + F2 + F3 + F4, where F1, F2, F3, and F4 are the forces of the first magnetic yoke 13 on the four permanent magnets respectively. This magnetic circuit design can reduce the driving power of the swing motor accordingly.

[0040] Assume that the end faces of the first permanent magnet 221 and the fourth permanent magnet 232 are N poles, and the end faces of the second permanent magnet 222 and the third permanent magnet 231 are S poles. When the first coil 11 and the second coil 12 are energized, the end face of the first leg 132 is an N pole, and the end face of the second leg 133 is an S pole, then the N pole of the first leg 132 will generate an attractive force on the S pole of the second permanent magnet 222, and a repulsive force on the N pole of the first permanent magnet 221. Similarly, the S pole of the second leg 133 will generate an attractive force on the N pole of the fourth permanent magnet 232, and a repulsive force on the S pole of the third permanent magnet 231, so that the output bracket completes the first swing, as shown in FIG. Figure 4 (a) shown.

[0041] When the current direction in the first coil 11 and the second coil 12 changes, the end face of the first leg 132 is the S pole, and the end face of the second leg 133 is the N pole, then the S pole of the first leg 132 will produce a repulsive force on the S pole of the second permanent magnet 222, and produce an attractive force on the N pole of the first permanent magnet 221. Similarly, the N pole of the second leg 133 will produce a repulsive force on the N pole of the fourth permanent magnet 232, and produce an attractive force on the S pole of the third permanent magnet 231, so that the swing arm frame 21 completes the second swing, returns to the initial position of the first swing, and completes a reciprocating swing, as shown in FIG. Figure 4 (b) shown.

[0042] In summary, the first coil 11 and the second coil 12 are connected with alternating pulses, so that the end surface of the first magnetic yoke 13 generates alternating magnetic poles, so that the permanent magnet generates an attractive torque and a repulsive torque, or a repulsive torque and an attractive torque, and drives the swing arm frame 21 to swing back and forth, thereby driving the corresponding mechanical unit to be swung through the swing arm frame 21, and as Figure 4The positions of the swing arm 21 shown in (a) and (b) are two positions where the swing arm 21 can be stabilized. If there is no elastic body blocking it, the swing arm 21 will return to the position where the coil is powered on or off. Figure 4 Position shown in (a) or (b).

[0043] To further illustrate, the width of the permanent magnet end face may be equal to or slightly smaller than the width of the first leg 132 and the second leg 133. Figure 4 When the two magnetic circuits are swung (i.e., the legs of the first yoke 13 are displaced between the corresponding two permanent magnet end faces), the driving current is stable. If the current is over-swung (i.e., when swinging, the legs of the first yoke 13 are displaced to the outside of the corresponding two permanent magnets), the current will increase sharply. Therefore, in the swing motor of the present application, the swing angle of the swing arm frame 21 must be less than or equal to the angle between the center line of the two permanent magnet end faces corresponding to the first leg 132 (or the second leg 133) of the first yoke 13 and the intersection at the center of the rotating shaft 24. Figure 4 As shown in (a) and (b), it can also be seen that the permanent magnet yoke 211 plays an indispensable role as a magnetic channel. The swing amplitude at the permanent magnet must be less than or equal to the center distance between the two permanent magnet end faces corresponding to the first leg 132 (or the second leg 133) of the first yoke 13.

[0044] like Figure 4 As shown, it can be understood that the distance from the force output part 641 to the center of the swing shaft 24 (external force arm) is much smaller than the distance from the arc end surface of the support foot of the first magnetic yoke 13 to the center of the swing shaft 24 (internal force arm). According to the principle of lever, the output force of the force output part 641 = electromagnetic driving force * (internal force arm / external force arm); and generally (internal force arm / external force arm) is greater than 2, so the output lever 64 of the swing motor of the present application has a larger output force.

[0045] In one embodiment, if Figure 5 As shown, the first permanent magnet group 22 also includes a fifth permanent magnet 223 installed on the swing arm frame 21, and the fifth permanent magnet 223 is located between the first permanent magnet 221 and the second permanent magnet 222; the end face polarity of the fifth permanent magnet 223 facing the first permanent magnet 221 is the same as the end face polarity of the first permanent magnet 221, and the end face polarity of the fifth permanent magnet 223 facing the second permanent magnet 222 is the same as the end face polarity of the second permanent magnet 222; it can be understood that the first permanent magnet 221, the second permanent magnet 222 and the fifth permanent magnet 223 are arranged opposite to the first support leg 132.

[0046] The second permanent magnet group 23 further includes a sixth permanent magnet 233 mounted on the swing arm frame 21, and the sixth permanent magnet 233 is located between the third permanent magnet 231 and the fourth permanent magnet 232; the end face polarity of the sixth permanent magnet 233 facing the third permanent magnet 231 is the same as the end face polarity of the third permanent magnet 231, and the end face polarity of the sixth permanent magnet 233 facing the fourth permanent magnet 232 is the same as the end face polarity of the fourth permanent magnet 232. It can be understood that the third permanent magnet 231, the fourth permanent magnet 232 and the sixth permanent magnet 233 are arranged opposite to the second leg 133.

[0047] It can be understood that in this embodiment, each permanent magnet group is composed of three permanent magnets arranged side by side; in each permanent magnet group, the magnetic polarities of the permanent magnets on both sides are opposite, the permanent magnet in the middle is placed horizontally, and its horizontal end face magnetic polarity is the same as the external end face magnetic polarity of the permanent magnets on both sides, and the two groups of permanent magnets are centrally symmetrical; the three permanent magnets are distributed on the same circumference with the swing shaft 24 as the center. With the three permanent magnets arranged in this way, the magnetic lines of force will be concentrated in the direction corresponding to the first leg 132 and the second leg 133, so that the electromagnetic force generated when the first coil 11 and the second coil 12 are energized is greater, and the magnetic lines of force in the direction of the permanent magnet yoke are reduced, so that the permanent magnet yoke 211 acting as a magnetic channel can be thinned accordingly, so that the mass of the mover mechanism 2 can be reduced.

[0048] In this embodiment, each permanent magnet group is composed of three permanent magnets arranged side by side, which can be simplified into Figure 4 The state of the two permanent magnets is used for electromagnetic motion analysis.

[0049] like Figures 6 to 10 As shown, another embodiment of the present invention further provides an electric device, including an actuator 8, a gear adjustment mechanism 7 and the above-mentioned swing motor; it can be understood that the actuator 8 includes but is not limited to a cutter head, a brush, etc., so that the electric device includes but is not limited to an electric clipper, an electric shaver, an electric brush, etc.

[0050] The gear adjustment mechanism 7 includes a wrench 71, a shaft 72, an elastic card needle assembly 73, an output connecting rod 74, a fan-shaped body 75 provided with a plurality of connected concave and convex tooth grooves 751, and a connecting piece 76 provided with a guide hole 761; the connecting piece 76 is installed on the main bracket 3; the fan-shaped body 75 is arranged on the shaft 72 and is provided with a convex cylinder 752, the output connecting rod 74 is slidably installed in the guide hole 761 and is rotatably connected to the convex cylinder 752 shaft 24; the elastic card needle assembly 73 is installed on the connecting piece 76, and the needle head 731 on the elastic card needle assembly 73 touches one of the concave and convex tooth grooves 751; as a preferred embodiment, The fan-shaped body 75 and the shaft body 72 are an integrally formed part; it can be understood that the center of the fan-shaped body 75 is on the axis of the shaft body 72; the wrench 71 is connected to one end of the shaft body 72, and the shaft body 72 can be rotated by the wrench 71, and the fan-shaped body 75 can follow the rotation; the needle head 731 is connected to a spring, which can be elastically expanded and contracted, so that the needle head 731 contacts one of the concave-convex tooth grooves 751, and when the fan-shaped body 75 rotates, the needle head 731 can be elastically expanded and contracted and converted to different connected concave-convex tooth grooves 751, thereby realizing gear adjustment; the number of tooth grooves of the concave-convex tooth grooves 751 corresponds to the number of gears.

[0051] The shaft 72 is rotatably mounted between the main frame 3 and the connecting member 76; the actuator 8 is slidably or rotatably arranged outside the main frame 3 and contacts the output connecting rod 74 and the swing arm frame 21; the output connecting rod 74 is used to drive the actuator 8 to move outside the main frame 3. It can be understood that Figure 8 and Fig. 9 As shown, a semi-circular groove is respectively provided on the connecting member 76 and the main support 3, and the shaft body 72 is rotatably installed in a circular hole enclosed by the two semi-circular grooves; the actuator 8 can be slidably or rotatably installed on the outside of the main support 3 through a slider, a slide groove and other mechanisms; a card slot is provided on the actuator 8, and the swing arm frame 21 or the output lever 64 installed on the swing arm frame 21 is inserted into the card slot, so that no matter how the output connecting rod 74 drives the actuator 8 to move, the swing arm frame 21 or the output lever 64 installed on the swing arm frame 21 is always inserted into the card slot, so that the swing arm frame 21 can drive the actuator 8 to swing back and forth.

[0052] Specifically, the user drives the shaft body 72 to rotate through the wrench 71, and the shaft body 72 drives the fan-shaped body 75 to rotate, and the needle head 731 of the elastic clamping needle assembly 73 contacts one of the concave-convex tooth grooves 751 of the fan-shaped body 75, so that the elastic clamping needle assembly 73 can support the positioning of the shaft body 72, and when the shaft body 72 rotates, the elastic clamping needle assembly 73 switches to different connected concave-convex tooth grooves 751 to make a plucking sound, which improves the user experience of the user rotating the gear adjustment mechanism 7; when the wrench 71 rotates, the fan-shaped body 75 follows and drives the output connecting rod 74 to slide in the guide hole 761 through the convex cylinder 752, and drives the actuator 8 to move forward and backward, thereby adjusting the extension length of the actuator 8 to achieve gear adjustment. In the present invention, the gear adjustment operation of the electric device is convenient.

[0053] In one embodiment, if Fig. 9 As shown, the main support 3 is provided with a third semi-circular arc groove 302, and the third semi-circular arc groove 302, relative to the longitudinally penetrating reinforcing rib 34, transversely penetrates the bottom surface of the main support 3; it can be understood that, as Figure 8 As shown, the third semi-circular groove 302 can be combined with the fourth semi-circular groove 762 on the connecting member 76 to form a circular hole, which is convenient for rotating the shaft body 72. The existence of the third semi-circular groove 302 can be matched with a variety of connecting members that need to install a rotating shaft, reducing the thickness of the connecting members and improving the versatility of the swing motor.

[0054] In one embodiment, if Fig.10 As shown, the actuator 8 has a movable knife component connected to a spring and can move forward and backward, and can be moved by the output connecting rod 74. At the same time, there is a slot on the movable knife component, and the output lever 64 is inserted into the slot to drive the movable knife component to swing.

[0055] Furthermore, the main support 3 can also be designed as an integral unit with the housing of the application electrical appliance, thereby simplifying the assembly of the appliance and being suitable for manufacturing large quantities of application electrical appliances.

[0056] Another embodiment of the present invention further provides an assembly method, which is applied to the above-mentioned swing motor, comprising: S100, install the swing shaft 24 in the shaft hole 39, and rotatably install the swing arm frame 21 on the mover placement position 32; it can be understood that the first permanent magnet 221, the second permanent magnet 222, the third permanent magnet 231 and the fourth permanent magnet 232 are first installed on the swing arm frame 21, and the swing shaft 24 is installed in the stator placement position 31, and then the swing arm frame 21 is rotatably installed on the swing shaft 24, and finally the pressure plate 62 is installed on the main bracket 3.

[0057] S200, the stator mechanism 1 is installed on the stator placement position 31 from the end away from the mover placement position 32. Due to the magnetic attraction between the first leg 132 and the first permanent magnet group 22, and the magnetic attraction between the second leg 133 and the second permanent magnet group 23, the stator mechanism 1 moves toward the mover mechanism 2 until the support seat 131 is hung on the positioning protrusion 33; it can be understood that the first coil 11 and the second coil 12 are firstly sleeved on the first leg 132 and the second leg 133 respectively, and then Then, the stator assembly is pushed into the stator placement position 31 from the end away from the mover placement position 32, and the positioning protrusion 33 moves relatively between the first coil 11 and the second coil 12 until the support seat 131 is hung on the positioning protrusion 33. At this time, the magnetic attraction of the first leg 132 to the first permanent magnet group 22 and the magnetic attraction of the second leg 133 to the second permanent magnet group 23 will not drive the stator mechanism 1 to move toward the mover mechanism 2; that is, the stator mechanism 1 is positioned on the stator placement position 31.

[0058] S300, fixing the stator mechanism 1 on the stator placement position 31. It can be understood that the fastener 14 is inserted into the first fastening hole 36 and the second fastening hole 1311, so as to fix the stator mechanism 1 on the main frame 3.

[0059] In the present invention, by controlling the distance between the positioning protrusion 33 and the mover placement position 32, the air gap between the mover mechanism 2 and the stator mechanism 1 can be controlled, so that the air gap size is no longer affected by the magnetic pull and the consistency of the air gap is guaranteed; and the assembly operation of the swing motor is simple.

[0060] Furthermore, after step S300 , the method further includes: moving the swing arm frame 21 , installing the first elastic body 4 and the second elastic body 5 in the first arc groove 37 and the second arc groove 38 respectively; and installing the cover plate 63 on the main body bracket 3 .

[0061] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A swing motor, characterized in that: It includes a stator mechanism, a mover mechanism and a main body bracket; The stator mechanism includes a first coil, a second coil and a first magnetic yoke; the first magnetic yoke includes a support seat and a first leg and a second leg connected to the support seat at intervals; the first magnetic yoke is formed of a magnetic conductive material and has a U-shaped structure; the first coil is sleeved on the first leg, and the second coil is sleeved on the second leg; The mover mechanism includes a swing arm frame, a swing shaft, a first permanent magnet group and a second permanent magnet group; the swing arm frame is formed of a magnetic conductive material; one end of the swing arm frame close to the first magnetic yoke is used as a permanent magnet yoke, and the end of the swing arm frame away from the first magnetic yoke is rotatably mounted on the swing shaft; the first permanent magnet group is arranged corresponding to the first leg, and the second permanent magnet group is arranged corresponding to the second leg; the first permanent magnet group includes a first permanent magnet and a second permanent magnet installed at intervals on the permanent magnet yoke, and the second permanent magnet group includes a third permanent magnet and a fourth permanent magnet installed at intervals on the permanent magnet yoke, the end faces of the first permanent magnet and the second permanent magnet corresponding to the first leg have opposite polarities, the end faces of the third permanent magnet and the fourth permanent magnet corresponding to the second leg have opposite polarities, and the end face polarity of the first permanent magnet corresponding to the first leg is the same as the end face polarity of the fourth permanent magnet corresponding to the second leg; The main support is provided with a stator placement position and a mover placement position in sequence; the stator placement position is provided with a positioning protrusion, and the support seat is hung on the positioning protrusion; the mover placement position is provided with an axis hole, the swing axis is installed in the axis hole, and the swing arm frame is rotatably installed on the mover placement position.

2. The swing motor according to claim 1, characterized in that: The swing motor also includes a first elastomer and a second elastomer; a first arc groove and a second arc groove are provided on the main body bracket; the first elastomer is installed in the first arc groove, and the second elastomer is installed in the second arc groove, and the first elastomer and the second elastomer are respectively abutted against opposite sides of the swing arm bracket.

3. The swing motor according to claim 2, characterized in that: The first elastic body comprises a first cylinder, and a plurality of first side grooves spaced apart in the circumferential direction are provided on the side wall of the first cylinder; The second elastic body comprises a second cylinder, and a plurality of second side grooves spaced apart in the circumferential direction are arranged on the side wall of the second cylinder.

4. The swing motor according to claim 2, characterized in that: First vertical side walls are arranged on both sides of the stator placement position, and second vertical side walls are arranged on both sides of the mover placement position, one end of the second vertical side wall is connected to the first vertical side wall, and the other end of the second vertical side wall is connected to the groove walls of the first arc groove and the second arc groove.

5. The swing motor according to claim 1, characterized in that: The main body bracket is also provided with reinforcing ribs, which separate the stator placement position into a first placement position and a second placement position, the first coil is located in the first placement position, and the second coil is located in the second placement position; the positioning protrusion is arranged on the reinforcing rib, and the positioning protrusion is provided with a positioning surface that is hung with the support seat.

6. The swing motor according to claim 1, characterized in that: The swing motor also includes a pressure plate and a cover plate; the pressure plate is installed on the main frame and abuts against the swing shaft; the cover plate is installed on the main frame and is used to press the first leg and the second leg tightly on the stator placement position.

7. The swing motor according to claim 1, characterized in that: The swing motor further comprises an output lever mounted on the swing arm frame, and a force output portion is provided on the output lever; The force output portion includes a first arc-shaped convex portion and a second arc-shaped convex portion arranged on opposite sides of the swing arm frame, the axis of the first arc-shaped convex portion coincides with the circular axis of the second arc-shaped convex portion, and the axis of the first arc-shaped convex portion is parallel to the swing axis.

8. The oscillating motor according to any one of claims 1 to 7, characterized in that: The first permanent magnet group further includes a fifth permanent magnet mounted on the permanent magnet yoke, and the fifth permanent magnet is located between the first permanent magnet and the second permanent magnet; The polarity of the end surface of the fifth permanent magnet facing one end of the first permanent magnet is the same as the polarity of the end surface of the first permanent magnet, and the polarity of the end surface of the fifth permanent magnet facing one end of the second permanent magnet is the same as the polarity of the end surface of the second permanent magnet; The second permanent magnet group further includes a sixth permanent magnet mounted on the permanent magnet yoke, and the sixth permanent magnet is located between the third permanent magnet and the fourth permanent magnet; The polarity of the end surface of the sixth permanent magnet facing the third permanent magnet is the same as that of the third permanent magnet, and the polarity of the end surface of the sixth permanent magnet facing the fourth permanent magnet is the same as that of the fourth permanent magnet.

9. An electric device, characterized in that: It comprises an actuator, a gear adjustment mechanism and a swing motor as claimed in any one of claims 1 to 8; The gear adjustment mechanism comprises a wrench, a shaft, an elastic clamping needle assembly, an output connecting rod, a sector-shaped body provided with a plurality of concave and convex tooth grooves, and a connecting piece provided with a guide hole; the sector-shaped body is arranged on the shaft and provided with a convex cylinder, the output connecting rod is slidably installed in the guide hole and is rotatably connected with the convex cylinder; the elastic clamping needle assembly is installed on the connecting piece, and the needle head on the elastic clamping needle assembly touches one of the concave and convex tooth grooves; the connecting piece is installed on the main bracket; The shaft is rotatably installed between the main support and the connecting piece; the actuator is slidably or rotatably arranged on the outside of the main support and contacts the output connecting rod and the swing arm frame; the output connecting rod is used to drive the actuator to move on the outside of the main support.

10. An assembly method, applied to the swing motor according to any one of claims 1 to 8, characterized in that: include: Install the swing shaft in the shaft hole, and rotatably install the swing arm frame on the swing shaft; The stator mechanism is installed on the stator placement position from the end away from the mover placement position, and due to the magnetic attraction between the first leg and the first permanent magnet group, and the magnetic attraction between the second leg and the second permanent magnet group, the stator mechanism moves toward the mover mechanism until the support seat is hung on the positioning protrusion; The stator mechanism is fixed on the main body bracket.

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