A motor

Abstract

The present invention relates to a motor, which comprises a stator assembly and a rotor assembly matched with the stator assembly; the rotor assembly comprises a rotating shaft and an elastic member; the rotating shaft comprises a first shaft portion penetrating the stator assembly, and a second shaft portion arranged at one end of the first shaft portion and driven to rotate by the first shaft portion; the elastic member is arranged between the first shaft portion and the second shaft portion to transmit the torque generated by the first shaft portion to the second shaft portion, and to generate a rebound force to drive the second shaft portion to rotate. The motor is provided with an elastic member between the first shaft portion and the second shaft portion of the rotating shaft, and the elastic member is connected to the first shaft portion and the second shaft portion, so that the torque generated by the first shaft portion is transmitted to the second shaft portion, and the rebound force is generated to drive the second shaft portion to rotate, thereby making the second shaft portion rotate at a high frequency, thereby improving the use effect and cleaning effect of the electric toothbrush driven by the motor.

Description

Technical Field

[0001] The present invention relates to a driving device, and more particularly to a motor. Background Art

[0002] The motor in the related art generally includes a stator assembly and a rotor assembly; the rotor assembly includes a rotating shaft, which is a long strip of shaft that passes through the stator assembly. Although the rotating shaft can rotate, it lacks resilience and has a low vibration frequency. Especially when the rotating shaft is locked, the rotor core of the motor is also stuck and burns the motor. The electric toothbrush using this drive device has poor use and cleaning effects and a short service life. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an improved motor.

[0004] The technical solution adopted by the present invention to solve its technical problems is: constructing a motor, including a stator assembly and a rotor assembly cooperating with the stator assembly; the rotor assembly includes a rotating shaft and an elastic member; the rotating shaft includes a first shaft portion passing through the stator assembly, and a second shaft portion arranged at one end of the first shaft portion and driven to rotate by the first shaft portion; the elastic member is arranged between the first shaft portion and the second shaft portion to transmit the torque generated by the first shaft portion to the second shaft portion, and generate a rebound force to drive the second shaft portion to rotate.

[0005] Preferably, the elastic member is fixedly connected to the first shaft portion and the second shaft portion, or the elastic member is detachably connected to the first shaft portion and the second shaft portion.

[0006] Preferably, the ends of the first shaft portion and the second shaft portion that are arranged opposite to each other are provided with a first slot for one end of the elastic member to be inserted into;

[0007] A second slot is formed at an end of the second shaft portion opposite to the first shaft portion for the other end of the elastic member to be inserted into.

[0008] Preferably, the elastic member includes a first elastic body connected to the first shaft portion and the second shaft portion.

[0009] Preferably, the first elastic body is in a sheet shape.

[0010] Preferably, the elastic member further comprises a second elastic body which is arranged at one end where the first elastic body is connected to the second shaft portion and forms a U-shaped structure with the first elastic body.

[0011] Preferably, the motor further comprises a casing, an end cover arranged at one end of the casing, and a shell arranged at an end of the end cover away from the casing; the second shaft portion is arranged to pass through the end cover;

[0012] The second elastic body is L-shaped, and one side of the second elastic body opposite to the first elastic body abuts against the inner side wall of the shell.

[0013] Preferably, the stator assembly comprises a stator core and at least two coil windings wound around the stator core.

[0014] Preferably, the stator assembly further comprises a winding support arranged in the stator core for winding the at least two coil windings;

[0015] The stator core includes a first splicing portion and a second splicing portion spliced ​​with the first splicing portion;

[0016] The winding bracket includes a first winding portion passing through the first splicing portion and a second winding portion passing through the second splicing portion and spliced ​​with the first winding portion.

[0017] Preferably, the rotor assembly further comprises a rotor core inserted into the stator core, and at least one pair of magnetic steels arranged on the rotor core;

[0018] The first shaft portion passes through the rotor core.

[0019] The motor implementing the present invention has the following beneficial effects: the motor transmits the torque generated by the first shaft portion to the second shaft portion by arranging an elastic member between the first shaft portion and the second shaft portion of the rotating shaft, and connects the elastic member to the first shaft portion and the second shaft portion, and generates a rebound force to drive the second shaft portion to rotate, thereby allowing the second shaft portion to rotate at a high frequency, thereby improving the use effect, cleaning effect and service life of the electric toothbrush driven by the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 is an exploded schematic diagram of a first embodiment of a motor of the present invention;

[0022] Figure 2 is an exploded schematic diagram of a second embodiment of a motor of the present invention;

[0023] Figure 3 1 is an exploded schematic diagram of a third embodiment of a motor of the present invention. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0025] Figure 1 The first embodiment of the motor of the present invention is shown. The motor can be used for an electric toothbrush, which can be arranged in the handle of the electric toothbrush and connected to the toothbrush head of the electric toothbrush, and can be used to drive the toothbrush head of the electric toothbrush to vibrate at a high frequency, thereby improving the use effect and cleaning effect of the electric toothbrush.

[0026] Furthermore, if Figure 1 As shown, the motor may include a stator assembly 10 and a rotor assembly 20; the stator assembly 10 may generate electromagnetic force to drive the rotor assembly 20 to rotate when powered on. The rotor assembly 20 may cooperate with the stator assembly 10 to drive the toothbrush head of the electric toothbrush to rotate.

[0027] Further, in this embodiment, the stator assembly 10 may include a stator core 11, at least two coil windings 12, and a winding support 13; the stator core 11 may be a hollow structure, and the at least two coil windings 12 may include two or more coil windings 12. The winding support 13 may be inserted into the stator core 11, and the coil winding 12 may be wound thereon. It is understandable that in some other embodiments, the winding support 13 may be omitted.

[0028] The stator core 11 can be punched out of hot-rolled or cold-rolled silicon steel sheets or iron-nickel soft magnetic alloy sheets. Of course, it can be understood that in some other embodiments, the material of the stator core 11 is not limited to silicon steel or iron-nickel soft magnetic alloy. The stator core 11 may include a first splicing portion 111 and a second splicing portion 112; the first splicing portion 111 may be spliced ​​with the second splicing portion 112 to form a cylindrical structure. The first splicing portion 111 may be provided with internal teeth protruding toward the first splicing portion 111; the second splicing portion 112 may be provided with internal teeth protruding toward the second splicing portion 112, and the internal teeth on the first splicing portion 111 and the second splicing portion 112 can be provided for the at least two coil windings 12 to be wound.

[0029] Further, in this embodiment, it may include two groups of coil windings 12, and each group of coil windings 12 may include two coil windings 12. The two coil windings 12 of one group may be arranged side by side on the first splicing portion 111, and they are respectively sleeved on the inner teeth of the first splicing portion 111, and are separated by the winding bracket 13. The two coil windings 12 of the other group may be arranged side by side on the second splicing portion 112, and they are respectively sleeved on the inner teeth of the second splicing portion 112, and are separated by the winding bracket 13.

[0030] Further, in this embodiment, the winding bracket 13 may be a hollow structure, the length of which may be greater than the length of the stator core 11, and the radial dimension of which may be smaller than the radial dimension of the stator core 11. The winding bracket 13 may be an insulating bracket, which may include a first winding portion 131 and a second winding portion 132 spliced ​​with the first winding portion 131, the first winding portion 131 may be inserted into the first splicing portion 111, and may be arranged between the two coil windings 12 located at the first splicing portion 111. The second winding portion 132 may be spliced ​​with the first winding portion 131 to form a cylindrical structure, which may be inserted into the second splicing portion 112, and may be arranged between the two coil windings 12 located at the second splicing portion 112.

[0031] Furthermore, in the present embodiment, the rotor assembly 20 may include a rotating shaft 21, an elastic member 22, a rotor core 23, and at least one pair of magnets 24; the rotating shaft 21 may be inserted into the stator assembly 10, specifically, the rotating shaft 21 may include a first shaft portion 211 and a second shaft portion 212, the first shaft portion 211 may be inserted into the rotor core 23, and after being combined with the rotor core 23, inserted into the winding bracket 13, and may rotate in cooperation with the stator assembly 12 when the stator assembly 12 is powered on, the second shaft portion 212 may be arranged at one end of the first shaft portion 211, and the end thereof away from the first shaft portion 211 may be used to connect to the toothbrush head of an electric toothbrush. The elastic member 22 may be disposed between the first shaft portion 211 and the second shaft portion 212, and may be connected to the first shaft portion 211 and the second shaft portion 212 respectively, and may increase the current of the motor body, increase the output torque by generating a rebound force, and drive the second shaft portion 212 to rotate, thereby causing the toothbrush head of the electric toothbrush to generate high-frequency vibrations, especially when the first shaft portion 211 is locked, it may prevent the motor from getting stuck and burning, because the first shaft portion 211 is connected with the elastic member 22, and the first shaft portion 211 will continue to rotate back and forth, and even provide stronger power to the second shaft portion 212. The at least one pair of magnets 24 may be disposed on the rotor core 23, and may include one or more pairs of magnets 24.

[0032] Further, in this embodiment, the elastic member 22 may be a metal sheet, which may be detachably connected to the first shaft portion 211 and the second shaft portion 212. It can be understood that in some other embodiments, it may be fixedly connected to the first shaft portion 211 and the second shaft portion 212. In this embodiment, specifically, the first shaft portion 211 and the second shaft portion 212 may have a first slot 2111 at their ends that are opposite to each other, and the second shaft portion 212 and the first shaft portion 211 may have a second slot 2121 at their ends that are opposite to each other. The elastic member 22 may include a first elastic body 221; the first elastic body may be in the shape of a longitudinal sheet, one end of which may be inserted into the first slot 2111, and the other end of which may be inserted into the second slot 2121, so as to be connected to the first shaft portion 211 and the second shaft portion 212. The elastic sheet 22 may transmit the torque generated by the first shaft portion 211 to the second shaft portion, and may generate a rebound force by generating elastic deformation to drive the second shaft portion 212 to rotate at a high frequency. It is understandable that in some other embodiments, the first elastic body may not be limited to being in the shape of a longitudinal sheet, and may be in an S-shape, a V-shape, a circle or other shapes.

[0033] Further, in this embodiment, the outer wall of the rotor core 23 may be provided with a plurality of installation grooves, and the installation grooves may be provided for the installation of the magnetic steel 24. The number of the installation grooves is equal to the number of the magnetic steel 24, and the installation grooves are provided in a one-to-one correspondence with the magnetic steel 24. The length of the device core 23 is adapted to the length of the stator core 11, and it may be inserted into the stator core 11, and it may vibrate in coordination with the stator core 11 when powered on, thereby driving the rotating shaft 21 to rotate and realize power output.

[0034] Further, in this embodiment, the at least one pair of magnetic steels 24 may include two pairs of magnetic steels 24, and each pair of magnetic steels 24 includes two magnetic steels disposed in two mounting grooves disposed opposite to each other in the rotor core 23. The two pairs of magnetic steels 24 may be disposed side by side.

[0035] Furthermore, in this embodiment, the motor may also include a bearing assembly 30; the bearing assembly 30 may include three bearings; the three bearings may be arranged at intervals in the winding bracket 13, two of which may be sleeved on both ends of the first shaft portion 211, and the other bearing may be sleeved on one end of the second shaft portion 212 that is opposite to the first shaft portion 211, which can facilitate the rotation of the rotating shaft 21.

[0036] Figure 2 The second embodiment of the motor of the present invention is shown, which is different from the first embodiment in that the winding support 13 can be omitted, the coil winding 12 can be two, which can be inserted into the stator core 11 and can be arranged opposite to each other. The motor can also include a housing 40, an end cover 50, a shell 60, and an insulating end piece 70.

[0037] Further, in this embodiment, the housing 40 may be a hollow structure, which may be a hollow cylinder, the inner side of which may form a receiving space, and the shape of the housing 40 may be a rectangular parallelepiped. It is understandable that in other embodiments, the shape of the housing 40 may not be limited to a rectangular parallelepiped. The housing 40 may be made of insulating metal, plastic, and other materials.

[0038] Further, in this embodiment, the end cover 50 may be disposed at one end of the housing 40, and may be a hollow structure, and the first shaft portion 211 may penetrate from the end cover 50 into the stator core 20. The end cover 211 may be detachably connected to the housing 50, and specifically, may be fixed by interference fit.

[0039] Further, in this embodiment, the housing 60 can be disposed at one end of the end cover 50 away from the housing 40, which can be an intermediate structure, and can include a first housing 61 and a second housing 62; the first housing 61 and the second housing 62 can be spliced ​​with each other. The elastic member 22 can be disposed in the housing 60.

[0040] In this embodiment, the elastic member 22 may further include a second elastic body 222; the second elastic body 222 may be disposed at one end of the first elastic body 221 connected to the second shaft portion 212, and may form a U-shaped structure with the first elastic body 221. The second elastic body 222 may be L-shaped, and one side thereof disposed opposite to the first elastic body 221 may abut against the side wall of the housing 60, and the second elastic body 22 may strengthen the strength of the rebound force, thereby increasing the rotation frequency of the second shaft portion 212.

[0041] Further, in this embodiment, there may be two insulating end pieces 70, which may be respectively disposed at both ends of the stator core 11, and may play a role in preventing leakage between the coil winding 12 and the stator core 11, and may be used to support the coil winding 12. It is understandable that in some other embodiments, the insulating end piece 70 may be omitted.

[0042] Figure 3 The third embodiment of the motor of the present invention is shown, which is different from the second embodiment in that the second elastic body 222 can be omitted, and the width of the end of the first elastic body 221 connected to the second shaft portion 212 is greater than the width of the end of the first elastic body 221 connected to the first shaft portion 211. The at least one pair of magnetic steels 24 may include a pair of magnetic steels, and the pair of magnetic steels 24 may include two magnetic steels 24; the two magnetic steels 24 may be arranged on two opposite sides of the rotor core 23.

[0043] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A motor, comprising a stator assembly (10) and a rotor assembly (20) matched with the stator assembly (10); characterized in that: The rotor assembly (20) comprises a rotating shaft (21) and an elastic member (22); the rotating shaft (21) comprises a first shaft portion (211) passing through the stator assembly (10), and a second shaft portion (212) arranged at one end of the first shaft portion (211) and driven to rotate by the first shaft portion (211); the second shaft portion (212) is used to be connected to a toothbrush head of an electric toothbrush; the elastic member (22) is in the form of a sheet and is arranged between the first shaft portion (211) and the second shaft portion (212), and is connected to the first shaft portion (211) and the second shaft portion (212). The second shaft portion (212) is connected to transmit the torque generated by the first shaft portion (211) to the second shaft portion (212), and to generate a rebound force to drive the second shaft portion (212) to rotate; the ends of the first shaft portion (211) and the second shaft portion (212) that are arranged opposite to each other are provided with a first clamping groove (2111) for one end of the elastic member (22) to be clamped in; the ends of the second shaft portion (212) and the first shaft portion (211) that are arranged opposite to each other are provided with a second clamping groove (2121) for the other end of the elastic member (22) to be clamped in; The elastic member (22) comprises a first elastic body (221) connected to the first shaft portion (211) and the second shaft portion (212), and a second elastic body (222) arranged at one end where the first elastic body (221) is connected to the second shaft portion (212) and forms a U-shaped structure with the first elastic body (221).

2. The motor according to claim 1, characterized in that The elastic member (22) is fixedly connected to the first shaft portion (211) and the second shaft portion (212), or the elastic member (22) is detachably connected to the first shaft portion (211) and the second shaft portion (212).

3. The motor according to claim 1, characterized in that The first elastic body (221) is in the shape of a sheet.

4. The motor according to claim 1, characterized in that The motor further comprises a casing (40), an end cover (50) arranged at one end of the casing (40), and a housing (60) arranged at an end of the end cover (50) away from the casing (40); the second shaft portion (212) is arranged to pass through the end cover (50); The second elastic body (222) is L-shaped, and a side thereof arranged opposite to the first elastic body (221) abuts against an inner side wall of the housing (60).

5. The motor according to claim 1, characterized in that The stator assembly (10) comprises a stator core (11) and at least two coil windings (12) wound around the stator core (11).

6. The motor according to claim 5, characterized in that The stator assembly (10) further comprises a winding support (13) arranged in the stator core (11) for winding the at least two coil windings (12); The stator core (11) comprises a first splicing portion (111) and a second splicing portion (112) spliced ​​to the first splicing portion (111); The winding bracket (13) comprises a first winding portion (131) passing through the first splicing portion (111) and a second winding portion (132) passing through the second splicing portion (112) and spliced ​​with the first winding portion (131).

7. The motor according to claim 5, characterized in that The rotor assembly (20) further comprises a rotor core (23) inserted into the stator core (11), and at least one pair of magnetic steels (24) arranged on the rotor core (23); The first shaft portion (211) is inserted into the rotor core (23).

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