Sweeping vibration motor
By improving the winding frame structure and rotor assembly connection method in the sweeping vibration motor, high-efficiency winding and stable connection were achieved, solving the problems of low winding efficiency and low slot fill factor, and improving production efficiency and motor performance.
Patent Information
- Application Number
- CN202520273633.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing sweeping vibratory motors have low winding efficiency, low slot fill factor, and limited winding quantity, resulting in low production efficiency.
The winding frame is equipped with slots and winding grooves on both the front and rear sides. The coil winding is wound on the outside of the winding frame. The stator core is inserted and positioned with the winding frame. The rotor assembly passes through the channel and rotates with the housing. The connection stability is improved by combining the frame and the limiting structure. The rotor assembly drives the rotating shaft to swing back and forth through the magnet.
It improves winding efficiency and slot fill factor, increases the number of coils, improves production efficiency and motor performance, makes the structure more robust and reliable, and simplifies the coil lead-out and fixing process.
Smart Images
Figure CN223798001U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an electric motor, and more particularly to a sweeping vibration motor. Background Technology
[0002] A sweeping vibratory motor, through servo control, adjusts the amplitude and frequency of its vibration to achieve precise and stable output, as seen in applications such as electric toothbrushes. Currently, the stator of a sweeping vibratory motor includes a yoke and winding frames connected to both ends of the yoke. During winding, the coil needs to be wound between the two winding frames. Due to this structural limitation, winding must occur inside the yoke, resulting in low winding efficiency and a limited number of coils that can be wound internally, leading to a low slot fill factor. Therefore, there is an urgent need for a sweeping vibratory motor that can improve both winding efficiency and quality. Utility Model Content
[0003] The purpose of this utility model is to provide a sweeping vibration motor to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0004] The solution to the technical problem of this utility model is:
[0005] A sweeping vibration motor includes: a housing; a stator assembly including a winding frame and a stator core, wherein a channel is provided in the middle of the winding frame along the vertical direction, slots are provided on the front and rear sides of the winding frame respectively, two slots are respectively connected to the channel, front winding slots are provided on the left and right sides of the front part of the winding frame respectively, and rear winding slots are provided on the left and right sides of the rear part of the winding frame respectively, and coil windings are respectively wound between the two front winding slots and between the two rear winding slots, the stator core is connected to the housing, and the stator core has a plug-in section that inserts into the two slots; and a rotor assembly that passes through the channel and is rotatably connected to the housing.
[0006] This technical solution has at least the following beneficial effects: In the stator assembly, coil windings can be directly wound between the front winding slots on the left and right sides of the front part of the winding frame, and coil windings can be directly wound between the rear winding slots on the left and right sides of the rear part of the winding frame. This is external winding, which greatly improves the efficiency of coil winding and allows for more coils to be wound, increasing the slot fill factor. Then, the stator core and the winding frame are connected to each other, and the insertion section of the stator core is inserted into the slot of the winding frame for positioning, achieving rapid positioning of both and being used to conduct magnetization inside the coil windings. Next, the entire stator assembly is installed into the housing, and the stator core is positioned against the inner wall of the housing. The rotor assembly passes through the channel and is rotatably connected to the housing, thus rotating within the channel and outputting power outward. By changing the structure of the stator assembly, winding can be performed on the winding frame in an external winding manner, greatly improving winding efficiency and quantity, thereby improving overall production efficiency and the overall performance of the motor.
[0007] As a further improvement to the above technical solution, the stator core includes a front frame and a rear frame connected to each other. The outer walls of the front frame and the rear frame respectively abut against the inner wall of the housing. The insertion section is formed on the rear middle side of the front frame and the front middle side of the rear frame. When assembling the stator assembly, the coil winding is first wound on the winding frame, and then the front frame and the rear frame are connected to each other around the stator core. During this process, the insertion section located on the rear middle side of the front frame is inserted into the slot on the front side of the winding frame, and the insertion section located on the front middle side of the rear frame is also inserted into the slot on the rear side of the winding frame, thus achieving mutual connection with the winding frame.
[0008] As a further improvement to the above technical solution, a front limiting groove is provided on the front side of the winding frame, with both ends of the front limiting groove extending to the two front winding grooves respectively. The front side of the front frame is embedded in the front limiting groove, and a rear limiting groove is provided on the rear side of the winding frame, with both ends of the rear limiting groove extending to the two rear winding grooves respectively. The rear side of the rear frame is embedded in the rear limiting groove. When the front frame and the winding frame are connected to each other, the plug-in section on the rear side of the front frame is inserted into the slot on the front side of the winding frame, and the front frame and the winding frame are brought closer together, so that the front side of the front frame is embedded in the front limiting groove. Similarly, when the rear frame and the winding frame are connected to each other, the plug-in section on the front side of the rear frame is inserted into the slot on the rear side of the winding frame, and the rear side of the rear frame is embedded in the rear limiting groove. This makes the connection between the front frame, the rear frame and the winding frame tighter, making the entire stator assembly structure more stable and reliable, and reducing the shaking generated in the housing.
[0009] As a further improvement to the above technical solution, recessed stops are provided on the left and right rear sides of the front frame, and convex stops are provided on the left and right front sides of the rear frame. The two convex stops are respectively engaged with the two recessed stops. When the front and rear frames are connected to each other, the engagement of the recessed stops on both sides of the front frame with the convex stops on both sides of the rear frame further improves the tightness of the connection and ensures that the connection between the front and rear frames abuts against the inner wall of the housing.
[0010] As a further improvement to the above technical solution, the winding frame is provided with limiting ribs on both the front and rear sides of the channel end. The upper and lower ends of the front side of the winding frame protrude directly opposite the two limiting ribs, and the upper and lower ends of the rear side of the winding frame also protrude directly opposite the two limiting ribs. At the end of the winding frame, because the winding frame is provided with limiting ribs on both the front and rear sides of the channel end, and the front and rear sides of the winding frame protrude directly opposite the two limiting ribs, a front and rear limiting structure can be formed at the end positions of the two coil windings. This can limit and shield the coil windings at the upper and lower ends, protect the coil windings, and improve the structural stability of the stator assembly.
[0011] As a further improvement to the above technical solution, one end of the winding frame is provided with winding hooks on the sides of the front and rear winding slots, respectively, with the two winding hooks extending away from the channel. When the wires of the two coil windings need to be led outwards, the wires can bypass the winding hooks and be positioned using the hooks. This eliminates the need to fix the wires with glue, improving the overall production efficiency and convenience.
[0012] As a further improvement to the above technical solution, the rotor assembly includes a rotating shaft and a magnet connected to the outside of the rotating shaft. Both ends of the rotating shaft are rotatably connected to the two sides of the housing. The rotating shaft is rotatably connected to the housing for outputting power outwards, while the magnet located outside the rotating shaft interacts with the winding coil, thereby driving the rotating shaft to reciprocate.
[0013] As a further improvement to the above technical solution, a positioning groove is formed on the outer side of the rotating shaft. The positioning groove extends along the axial direction of the rotating shaft, and four positioning grooves are evenly arranged along the outer circumference of the rotating shaft. The four magnets are respectively connected to the four positioning grooves, and the two magnets located on both sides of the coil winding have opposite magnetic properties. When the two coil windings are energized, electromagnetic fields with opposite magnetic properties are generated on the insertion sections located in the two slots. Since the magnets located on both sides of each coil winding have opposite magnetic properties, the two magnets drive the rotating shaft to rotate. By changing the direction of the current supplied to the coil windings, the swing direction of the rotating shaft can be controlled, thereby realizing the output of reciprocating vibration power.
[0014] As a further improvement to the above technical solution, the housing includes an outer shell and an end cap. An upward-opening cavity is formed within the outer shell. The end cap is connected to the rear side of the outer shell and covers the cavity. The stator core is located within the outer shell. The rotating shaft is rotatably connected to the front side of the outer shell and the end cap. The outer shell forms a cavity for storage. After the stator assembly and rotor assembly are installed into the outer shell, the end cap is connected to the cavity opening to seal the cavity, and the rotating shaft and end cap are rotatably connected to each other.
[0015] As a further improvement to the above technical solution, the end cap is provided with an anti-rotation groove at the end position opposite to the rotating shaft. The end of the rotating shaft has an anti-rotation segment that inserts into the anti-rotation groove, and the anti-rotation groove can restrict the rotation of the anti-rotation segment by 180 degrees. An anti-rotation groove is provided inside the end cap to limit excessive rotation of the rotating shaft. When the rotating shaft rotates beyond a certain angle, the anti-rotation segment at the end of the rotating shaft abuts against the inner wall of the anti-rotation groove, thereby creating a limiting effect and ensuring that the rotating shaft can reciprocate. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.
[0017] Figure 1 This is an exploded view of the entire utility model.
[0018] Figure 2 This is a three-dimensional view of the winding frame of this utility model.
[0019] Figure 3 This is a perspective view of the stator assembly and rotor assembly of this utility model assembled together.
[0020] Figure 4 This is an overall front view of the present invention.
[0021] Figure 5 yes Figure 4 A schematic diagram of the AA cross-sectional structure.
[0022] In the attached diagram: 1-casing, 11-outer shell, 12-end cover, 121-anti-rotation groove, 21-winding frame, 211-channel, 212-slot, 213-front winding groove, 214-rear winding groove, 215-front limiting groove, 216-rear limiting groove, 217-limiting rib, 218-winding hook, 221-plug section, 222-front frame, 223-rear frame, 224-concave stop, 225-convex stop, 23-coil winding, 31-shaft, 311-anti-rotation section, 32-magnet. Detailed Implementation
[0023] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.
[0024] Reference Figures 1 to 5 A sweeping vibration motor includes: a housing 1; a stator assembly including a winding frame 21 and a stator core, wherein the winding frame 21 has a channel 211 arranged in the middle along the vertical direction, and slots 212 are respectively arranged on the front and rear sides of the winding frame 21, the two slots 212 are respectively connected to the channel 211, front winding slots 213 are respectively arranged on the left and right sides of the front part of the winding frame 21, and rear winding slots 214 are respectively arranged on the left and right sides of the rear part of the winding frame 21, and coil windings 23 are respectively wound between the two front winding slots 213 and between the two rear winding slots 214, the stator core is connected to the housing 1, and the stator core has a plug-in section 221 that inserts into the two slots 212; and a rotor assembly that passes through the channel 211 and is rotatably connected to the housing 1.
[0025] When assembling the sweeping vibration motor, for the stator assembly, the coil winding 23 can be directly wound between the front winding slots 213 on the left and right sides of the front part of the winding frame 21, and the coil winding 23 can be directly wound between the rear winding slots 214 on the left and right sides of the rear part of the winding frame 21. This is external winding, which greatly improves the efficiency of coil winding and allows for more coils to be wound, increasing the slot fill factor. Then, the stator core is connected to the winding frame 21, and the insertion section 221 of the stator core is inserted into the slot 212 of the winding frame 21 for positioning, achieving two-way positioning. The stator assembly is quickly positioned and used to magnetize the inside of the coil winding 23. Then, the entire stator assembly is installed into the housing 1, and the stator core is positioned against the inner wall of the housing 1. The rotor assembly passes through the channel 211 and is rotatably connected to the housing 1, thereby rotating within the channel 211 and outputting power outward. By changing the structure of the stator assembly, winding can be performed on the winding frame 21 by external winding, which greatly improves the winding efficiency and quantity, thereby improving the overall production efficiency and the overall motor performance.
[0026] The stator core can be assembled on the outside of the winding frame 21 using a split structure. Specifically, the stator core includes a front frame 222 and a rear frame 223 connected to each other. The outer walls of the front frame 222 and the rear frame 223 respectively abut against the inner wall of the housing 1. The insertion section 221 is formed on the rear middle side of the front frame 222 and the front middle side of the rear frame 223. When assembling the stator assembly, the coil winding 23 is first wound on the winding frame 21. Then, the front frame 222 and the rear frame 223 are connected to each other around the stator core. During this process, the insertion section 221 located on the rear middle side of the front frame 222 is inserted into the slot 212 on the front side of the winding frame 21, and the insertion section 221 located on the front middle side of the rear frame 223 is also inserted into the slot 212 on the rear side of the winding frame 21, thus achieving mutual connection with the winding frame 21.
[0027] To improve the tightness of the assembly connection between the winding frame 21 and the stator core, in this embodiment, a front limiting groove 215 is provided on the front side of the winding frame 21, and the two ends of the front limiting groove 215 extend to the two front winding grooves 213 respectively. The front side of the front frame 222 is embedded in the front limiting groove 215. A rear limiting groove 216 is provided on the rear side of the winding frame 21, and the two ends of the rear limiting groove 216 extend to the two rear winding grooves 214 respectively. The rear side of the rear frame 223 is embedded in the rear limiting groove 216. When the front frame 222 is connected to the winding frame 21, the plug section 221 on the rear side of the front frame 222 is inserted into the slot 212 on the front side of the winding frame 21, and the front frame 222 and the winding frame 21 are brought closer together, so that the front side of the front frame 222 is embedded in the front limiting groove 215. Similarly, when the rear frame 223 is connected to the winding frame 21, the plug section 221 on the front side of the rear frame 223 is inserted into the slot 212 on the rear side of the winding frame 21, and the rear side of the rear frame 223 is embedded in the rear limiting groove 216. This makes the connection between the front frame 222, the rear frame 223 and the winding frame 21 tighter, making the entire stator assembly structure more stable and reliable, and reducing the shaking generated in the housing 1.
[0028] Furthermore, the left and right rear sides of the front frame 222 are respectively provided with recessed stops 224, and the left and right front sides of the rear frame 223 are respectively provided with convex stops 225. The two convex stops 225 are respectively engaged with the two recessed stops 224. When the front frame 222 and the rear frame 223 are connected to each other, the engagement of the recessed stops 224 on both sides of the front frame 222 and the convex stops 225 on both sides of the rear frame 223 can further improve the tightness of the connection between the two and ensure that the connection between the front frame 222 and the rear frame 223 can abut against the inner wall of the housing 1.
[0029] To better limit the movement of the winding coils, in this embodiment, the winding frame 21 is provided with limiting ribs 217 on both the front and rear sides of the end of the channel 211. The upper and lower ends of the front side of the winding frame 21 protrude directly opposite the two limiting ribs 217, and the upper and lower ends of the rear side of the winding frame 21 protrude directly opposite the two limiting ribs 217. At the end of the winding frame 21, since the winding frame 21 is provided with limiting ribs 217 on both the front and rear sides of the end of the channel 211, and the front and rear sides of the winding frame 21 protrude directly opposite the two limiting ribs 217, a front and rear limiting structure can be formed at the end of the two coil windings 23. This can limit and shield the coil windings 23 at their upper and lower ends, protect the coil windings 23, and improve the structural stability of the stator assembly.
[0030] When the wires on the coil windings 23 need to be led outwards, the current method of fixing them by splicing wires or applying glue is rather cumbersome. Therefore, in this embodiment, one end of the winding frame 21 is provided with a winding hook 218 on the side of the front winding groove 213 and the rear winding groove 214, respectively. The two winding hooks 218 extend away from the channel 211. When the wires of the two coil windings 23 need to be led outwards, the wires can bypass the winding hooks 218 and be positioned using the winding hooks 218. This eliminates the need to fix the wires with glue, improving the overall production efficiency and convenience.
[0031] As a specific structural embodiment of the rotor assembly, the rotor assembly includes a rotating shaft 31 and a magnet 32 connected to the outside of the rotating shaft 31. The two ends of the rotating shaft 31 are rotatably connected to the two sides of the housing 1, respectively. The rotating shaft 31 is rotatably connected to the housing 1 for outputting power outward, while the magnet 32 located outside the rotating shaft 31 interacts with the winding coil, thereby driving the rotating shaft 31 to oscillate back and forth.
[0032] Furthermore, a positioning groove is formed on the outer side of the rotating shaft 31. The positioning groove extends along the axial direction of the rotating shaft 31, and four positioning grooves are evenly arranged along the outer periphery of the rotating shaft 31. The four magnets 32 are respectively connected to the four positioning grooves. The two magnets 32 located on both sides of the coil winding 23 have opposite magnetic properties. In practical applications, a bushing can be fixed on the outer side of the rotating shaft 31, and the positioning groove is formed on the outer side of the bushing. In this case, the four magnets 32 are fixed to the four positioning grooves by adhesive. When the two coil windings 23 are energized, an electromagnetic field with opposite magnetic properties is generated on the insertion section 221 located in the two slots 212. Since the magnets 32 located on both sides of each coil winding 23 have opposite magnetic properties, the two magnets 32 drive the rotating shaft 31 to rotate. By changing the direction of the current supplied to the coil winding, the swing direction of the rotating shaft 31 can be controlled, thereby realizing the output of reciprocating vibration power.
[0033] As a specific embodiment of the housing 1 structure, the housing 1 includes an outer shell 11 and an end cover 12. The outer shell 11 has an upward-opening cavity. The end cover 12 is connected to the rear side of the outer shell 11 and covers the cavity. The stator core is located inside the outer shell 11. The rotating shaft 31 is rotatably connected to the front side of the outer shell 11 and the end cover 12. The outer shell 11 forms a cavity for storage. After the stator assembly and rotor assembly are installed in the outer shell, the end cover 12 is connected to the cavity opening of the outer shell 11 to seal the cavity. The rotating shaft 31 and the end cover 12 are rotatably connected to each other.
[0034] To prevent excessive rotation of the rotating shaft 31, in this embodiment, the end cap 12 is provided with an anti-rotation groove 121 at the end position opposite to the rotating shaft 31. An anti-rotation segment 311 is formed at the end of the rotating shaft 31 and inserted into the anti-rotation groove 121. The anti-rotation groove 121 can restrict the rotation of the anti-rotation segment 311 by 180 degrees. In practical applications, milled flat sections can be machined on both sides of the end of the rotating shaft 31; these sections constitute the anti-rotation segment 311. The positions within the anti-rotation groove 121 opposite the two milled flat sections are respectively set as planes. When the milled flat sections of the rotating shaft 31 rotate to abut against the planes within the anti-rotation groove 121, the rotation of the rotating shaft 31 is restricted. The anti-rotation groove 121 within the end cap 12 restricts excessive rotation of the rotating shaft 31. When the rotating shaft 31 rotates beyond a certain angle, the anti-rotation segment 311 at the end of the rotating shaft 31 abuts against the inner sidewall of the anti-rotation groove 121, thereby creating a limiting effect and ensuring that the rotating shaft 31 achieves reciprocating rotation.
[0035] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A sweeping vibration motor, characterized in that: include: Casing (1); The stator assembly includes a winding frame (21) and a stator core. The winding frame (21) has a channel (211) in the middle along the vertical direction. The winding frame (21) has slots (212) on the front and rear sides respectively. The two slots (212) are connected to the channel (211). The left and right sides of the front part of the winding frame (21) are respectively provided with front winding grooves (213). The left and right sides of the rear part of the winding frame (21) are respectively provided with rear winding grooves (214). Coil windings (23) are wound between the two front winding grooves (213) and between the two rear winding grooves (214). The stator core is connected to the housing (1). The stator core has a plug section (221) that can be inserted into the two slots (212). The rotor assembly passes through the channel (211) and is rotatably connected to the housing (1).
2. A sweeping vibration motor according to claim 1, characterized in that: The stator core includes a front frame (222) and a rear frame (223) connected to each other. The outer sidewalls of the front frame (222) and the rear frame (223) abut against the inner sidewall of the housing (1). The insertion section (221) is formed on the rear middle side of the front frame (222) and the front middle side of the rear frame (223).
3. A sweeping vibration motor according to claim 2, characterized in that: The winding frame (21) has a front limiting groove (215) on its front side, and the two ends of the front limiting groove (215) extend to the two front winding grooves (213) respectively. The front side of the front frame (222) is embedded in the front limiting groove (215). The winding frame (21) has a rear limiting groove (216) on its rear side, and the two ends of the rear limiting groove (216) extend to the two rear winding grooves (214) respectively. The rear side of the rear frame (223) is embedded in the rear limiting groove (216).
4. A sweeping vibration motor according to claim 2, characterized in that: The front frame (222) has recessed stops (224) on its left rear side and right rear side respectively, and the rear frame (223) has convex stops (225) on its left front side and right front side respectively. The two convex stops (225) are respectively connected to the two recessed stops (224).
5. A sweeping vibration motor according to claim 1, characterized in that: The winding frame (21) is provided with limiting ribs (217) at the front and rear sides of the end of the channel (211). The upper and lower ends of the front side of the winding frame (21) protrude to face the two limiting ribs (217), and the upper and lower ends of the rear side of the winding frame (21) protrude to face the two limiting ribs (217).
6. A sweeping vibration motor according to claim 1, characterized in that: One end of the winding frame (21) is located on the side of the front winding groove (213) and the rear winding groove (214) respectively, and the two winding hooks (218) extend in a direction away from the channel (211).
7. A sweeping vibration motor according to claim 1, characterized in that: The rotor assembly includes a rotating shaft (31) and a magnet (32) connected to the outside of the rotating shaft (31). The two ends of the rotating shaft (31) are rotatably connected to the two sides of the housing (1).
8. A sweeping vibration motor according to claim 7, characterized in that: A positioning groove is formed on the outer side of the rotating shaft (31). The positioning groove extends along the axial direction of the rotating shaft (31). Four positioning grooves are evenly arranged along the outer periphery of the rotating shaft (31). The four magnets (32) are respectively connected to the four positioning grooves. The two magnets (32) located on both sides of the coil winding (23) have opposite magnetism.
9. A sweeping vibration motor according to claim 7, characterized in that: The housing (1) includes an outer shell (11) and an end cap (12). The outer shell (11) has an upward-opening cavity. The end cap (12) is connected to the rear side of the outer shell (11) and covers the cavity. The stator core is located inside the outer shell (11). The rotating shaft (31) is rotatably connected to the front side of the outer shell (11) and the end cap (12).
10. A sweeping vibration motor according to claim 9, characterized in that: The end cap (12) is provided with an anti-rotation groove (121) at the end position of the rotating shaft (31). The end of the rotating shaft (31) is formed with an anti-rotation section (311) that is inserted into the anti-rotation groove (121). The anti-rotation groove (121) can restrict the anti-rotation section (311) to rotate 180 degrees.