CN215071903U

CN215071903U - Swing motor applied to electric toothbrush

Info

Publication number: CN215071903U
Application number: CN202121165964.3U
Authority: CN
Inventors: 王建
Original assignee: Suzhou Beiertesi Electronic Technology Co ltd
Current assignee: Suzhou Beiertesi Electronic Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-12-07
Anticipated expiration: 2031-05-28

Abstract

The utility model relates to a swing motor applied to an electric toothbrush, which comprises a hollow shell and a stator fixedly arranged in the shell, wherein the center of the stator is provided with a rotor, two ends of a rotating shaft of the rotor are respectively rotatably connected with two ends of the shell, the front end of the rotating shaft passes through the front end of the shell and extends out of the shell, the shell comprises a tubular body with an opening at the rear end and a rear end cover connected with the rear end of the body, the front end of the body is an annular front end plate, a bearing assembling pipe is integrally formed on the front end plate and is positioned in a central hole of the front end plate, the rear end cover comprises a base body right opposite to the rear end of the body and an annular plug-in body connected on the front end surface of the base body, the plug-in body is matched with an inner hole at the rear end of the body, the plug-in body can be inserted into the body, the front end of the base body is provided with a positioning hole matched with the rear end of the rotating shaft, lubricating grease is filled in the positioning hole, the front end of the rotating shaft of the rotor is rotatably connected in the bearing assembling pipe at the front end of the shell through the bearing, the rear end of the rotating shaft is rotatably connected in the positioning hole of the positioning column.

Description

Swing motor applied to electric toothbrush

Technical Field

The utility model relates to a be applied to electric toothbrush's swing motor.

Background

The swing motor is a driving device applied to an electric toothbrush, for example, patent No. 2019223546988, the patent name is "a permanent magnet swing motor", the swing motor is generally composed of a shell, a stator and a rotor, the two ends of the rotor shaft are respectively connected with the front end and the rear end of the shell through a bearing in a rotating way, because the outer diameter of the rear end of the shaft is smaller than that of the front end, a shaft sleeve is added at the rear end of the bearing when the bearing is connected, the shaft sleeve is sleeved at the rear end of the shaft, then the bearing sleeve is sleeved on the shaft sleeve, the rotating connection of the shaft and the bearing can be realized, the structure is more complex, the cost is higher, and therefore the swing motor is necessary to be improved, the structure is simplified and the cost is reduced on the premise of ensuring the mechanical performance of the shaft.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides a swing motor which has simple structure and low cost and is applied to an electric toothbrush.

In order to solve the technical problem, the utility model discloses a technical scheme is: a swing motor applied to an electric toothbrush comprises a hollow shell and a stator fixedly arranged in the shell, wherein a rotor is arranged at the center of the stator, two ends of a rotating shaft of the rotor are respectively rotatably connected with two ends of the shell, the front end of the rotating shaft penetrates through the front end of the shell to extend out of the shell, the shell comprises a tubular body with an opening at the rear end and a rear end cover connected with the rear end of the body, the front end of the body is an annular front end plate, a bearing assembling pipe is integrally formed on the front end plate and is positioned in a central hole of the front end plate, the rear end cover comprises a base body right opposite to the rear end of the body and an annular plug-in body connected on the front end surface of the base body, the plug-in body is matched with an inner hole at the rear end of the body, the plug-in body can be inserted, a positioning hole matched with the rear end of the rotating shaft is formed at the front end of the base body, lubricating grease is filled in the positioning hole, the front end of the rotating shaft of the rotor is rotatably connected in a bearing assembling pipe at the front end of the shell through a bearing, the rear end of the rotating shaft is rotatably connected in the positioning hole of the positioning column.

As a preferred scheme, an annular groove surrounding the periphery of the positioning hole is further formed in the front end face of the base body, a positioning column parallel to the rotating shaft is formed in the portion, located in the annular groove, of the base body, and the positioning hole is formed in the front end of the positioning column.

As a preferred scheme, the depth of the annular groove is 2-4 times of the diameter of the positioning column.

As a preferred scheme, the rear end of the body is integrally formed with a pair of positioning pieces extending towards the rear end, the pair of positioning pieces are symmetrically arranged at two sides of the body, the base body is provided with a pair of positioning grooves, the positioning grooves correspond to the positioning pieces one by one, and the positioning pieces are bent towards the corresponding positioning grooves, so that the positioning pieces are partially embedded into the positioning grooves to fix the rear end cover on the body.

As a preferred scheme, two sides of the base body are respectively provided with a groove, and the enameled wires at two ends of the winding on the stator respectively extend out of the shell body through one groove.

Preferably, the front end of the bearing assembling pipe is integrally formed with an end ring for blocking the bearing.

The utility model has the advantages that: the utility model discloses a set up the locating hole on the base member of rear end cap, fix a position the pivot rear end of rotor through the locating hole, make the pivot rear end rotate through the locating hole simultaneously and connect on the rear end cap of casing, realize that the casing is connected with the rotation of rotor, because swing motor is applied to electric toothbrush, and electric toothbrush is about for two minutes during at every turn use, belong to the short time and use, through the actual measurement, the pivot direct rotation is connected and can not lead to the rear end cap high temperature and take place danger in the locating hole, and under the lubrication action of lubricating grease, can not increase the energy consumption yet, therefore, through the above-mentioned improvement, on the basis of realizing the original mechanical properties of swing motor, the structure is simplified, and the cost is reduced.

The utility model discloses further through set up the ring channel on the base member, make the locating hole set up on the reference column, but through reference column minute quantity wobbling characteristic, make the rear end of pivot have certain swing range, improve swing motor's swing range, improve the clean effect of the electric toothbrush who uses this swing motor to the tooth.

Drawings

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a sectional view A-A of FIG. 1;

in FIGS. 1 to 3: 1. the motor comprises a shell, 101, a body, 1011, a front end plate, 1012, a bearing assembling pipe, 1013, an end ring, 102, a rear end cover, 1021, a base body, 1022, an inserting body, 1023, an annular groove, 1024, a positioning column, 1025, a positioning hole, 103, a positioning sheet, 104, a positioning groove, 105, a groove, 2, a stator, 201, an enameled wire, 202, a bracket, 203, a coil, 204, a permanent magnet, 3, a rotor, 301, 302, an iron core, a rotating shaft, 4 and a bearing.

Detailed Description

The following describes in detail a specific embodiment of the present invention with reference to the drawings.

As shown in fig. 1 and fig. 2, a swing motor applied to an electric toothbrush comprises a hollow housing 1 and a stator 2 fixedly arranged in the housing 1, a rotor 3 is arranged in the center of the stator 2, two ends of a rotating shaft 301 of the rotor 3 are respectively rotatably connected with two ends of the housing 1, the front end of the rotating shaft 301 passes through the front end of the housing 1 and extends out of the housing, the housing 1 comprises a tubular body 101 with an opening at the rear end and a rear end cover 102 connected with the rear end of the body 101, the front end of the body 101 is an annular front end plate 1011, a bearing assembling pipe 1012 is integrally formed on the front end plate 1011, the bearing assembling pipe 1012 is positioned in a central hole of the front end plate 1011, the rear end cover 102 comprises a base 1021 right opposite to the rear end of the body 101 and an annular plug body 1022 connected on the front end surface of the base 1021, the plug body 1022 is matched with the inner hole at the rear end of the body 101, the plug 1022 can be inserted into the body 101, a positioning hole 1025 matched with the rear end of the rotating shaft 301 is arranged at the front end of the base 1021, the positioning hole 1025 is filled with grease, the front end of the rotating shaft 301 of the rotor 3 is rotatably connected in the bearing assembling tube 1012 at the front end of the shell 1 through the bearing 4, and the rear end of the rotating shaft 301 is rotatably connected in the positioning hole 1025 of the positioning column 1024.

In this embodiment, an annular groove 1023 surrounding the positioning hole 1025 is further formed on the front end surface of the base 1021, a positioning column 1024 parallel to the rotating shaft 301 is formed on the portion of the base 1021 in the annular groove 1023, and the positioning hole 1025 is formed at the front end of the positioning column 1024. The depth of the annular groove 1023 is preferably 2-4 times the diameter of the positioning column 1024. By utilizing the characteristic that the positioning column 1024 can slightly swing, the rear end of the rotating shaft 301 has a certain radial swing amplitude, so that the swing amplitude of the swing motor is improved, and the cleaning capability of the electric toothbrush using the swing motor on teeth is improved.

As shown in fig. 1, a pair of positioning pieces 103 extending to the rear end are integrally formed at the rear end of the body 101, the pair of positioning pieces 103 are symmetrically arranged at two sides of the body 101, a pair of positioning slots 104 are formed on the base 1021, the positioning slots 104 correspond to the positioning pieces 103 one by one, and the positioning pieces 103 are bent towards the corresponding positioning slots 104, so that the positioning pieces 103 are partially embedded into the positioning slots 104 to fix the rear end cover 102 on the body 101.

As shown in fig. 2, two grooves 105 are respectively formed on two sides of the base 1021, and the enameled wires 201 at two ends of the winding on the stator 2 respectively extend out of the housing 1 through one groove 105 for connecting to a controller (not shown) for controlling the operation of the swing motor.

As shown in fig. 1, the front end of the bearing-fitting tube 1012 is integrally formed with an end ring 1013 for blocking the bearing 4 to prevent the bearing 4 from coming off.

As shown in fig. 1 and fig. 3, in this embodiment, the stator 2 includes a support 202, two coils 203 wound on the support 202, and two pairs of permanent magnets 204 embedded on the support 202, the two coils 203 are coaxially disposed, the two pairs of permanent magnets 204 are disposed at two ends of the support 202 in the axial direction of the two coils 203, the rotor 3 includes a rotor 301 and an iron core 302 sleeved on the rotating shaft 301, the iron core 302 has two magnetic poles, the iron core 302 is inserted into the support 202, the two magnetic poles of the iron core 302 are inserted into the two coils 203, each magnetic pole corresponds to one pair of permanent magnets 204, and the two permanent magnets 204 that are a pair of each other are disposed separately from each other.

The utility model discloses the working process is: as shown in fig. 1 to 3, when the coil 203 of the stator 2 is energized, the rotor 3 is rotated, the current direction of the coil 203 is switched at a high frequency, so that the rotor 3 can swing back and forth, and the rotating shaft 301 is rotatably connected to the rear end cap 102 during the back and forth swing of the rotor 3, thereby simplifying the structure of the swing motor, reducing the manufacturing cost of the swing motor, and improving the swing amplitude of the rotating shaft 301 of the swing motor and the tooth cleaning capability of the electric toothbrush using the swing motor on the basis that the positioning column 1024 slightly axially swings.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. A swing motor applied to an electric toothbrush comprises a hollow shell (1) and a stator (2) fixedly arranged in the shell (1), wherein a rotor (3) is arranged at the center of the stator (2), two ends of a rotating shaft (301) of the rotor (3) are respectively rotatably connected with two ends of the shell (1), the front end of the rotating shaft (301) penetrates through the front end of the shell (1) to extend out of the shell, the swing motor is characterized in that the shell (1) comprises a tubular body (101) with an opening at the rear end and a rear end cover (102) connected with the rear end of the body (101), the front end of the body (101) is an annular front end plate (1011), a bearing assembly pipe (1012) is integrally formed on the front end plate (1011), the bearing assembly pipe (1012) is positioned in a central hole of the front end plate (1011), the rear end cover (102) comprises a base body (1021) just opposite to the rear end of the body (101) and an annular inserting body (1022) connected on the front end surface of the base body (1021), the plug-in body (1022) is matched with an inner hole at the rear end of the body (101), the plug-in body (1022) can be inserted into the body (101), a positioning hole (1025) matched with the rear end of the rotating shaft (301) is formed in the front end of the base body (1021), lubricating grease is filled in the positioning hole (1025), the front end of the rotating shaft (301) of the rotor (3) is rotatably connected into a bearing assembly pipe (1012) at the front end of the shell (1) through a bearing (4), and the rear end of the rotating shaft (301) is rotatably connected into the positioning hole (1025) of the positioning column (1024).

2. The swing motor for an electric toothbrush according to claim 1, wherein the base body (1021) further comprises an annular groove (1023) formed at a front end surface thereof and surrounding the positioning hole (1025), a portion of the base body (1021) located in the annular groove (1023) forms a positioning post (1024) parallel to the rotation axis (301), and the positioning hole (1025) is formed at a front end of the positioning post (1024).

3. An oscillating motor for electric toothbrushes according to claim 2, characterised in that the depth of the annular groove (1023) is 2-4 times the diameter of the positioning post (1024).

4. The swing motor applied to the electric toothbrush according to any one of claims 1 to 3, wherein a pair of positioning plates (103) extending to the rear end are integrally formed at the rear end of the body (101), the pair of positioning plates (103) are symmetrically arranged at two sides of the body (101), a pair of positioning grooves (104) are formed on the base body (1021), the positioning grooves (104) correspond to the positioning plates (103) one by one, the positioning plates (103) are bent towards the corresponding positioning grooves (104), so that the positioning plates (103) are partially embedded into the positioning grooves (104) to fix the rear end cover (102) on the body (101).

5. The swing motor applied to the electric toothbrush according to any one of claims 1 to 3, wherein a groove (105) is formed on each side of the base body (1021), and the enameled wires (201) at each end of the winding on the stator (2) extend out of the housing (1) through the groove (105).

6. The swing motor for an electric toothbrush according to any one of claims 1 to 3, wherein an end ring (1013) for stopping the bearing (4) is integrally formed at a front end of the bearing installation pipe (1012).