A dual bearing packaged motor for an electric toothbrush

Abstract

This utility model discloses a dual-bearing packaged electric toothbrush motor, including a housing body. An electric motor is installed inside the housing body, and a vibration shaft is fixedly connected to the output end of the electric motor. A first bearing is disposed on the top of the electric motor, and a second bearing is disposed at the connection between the vibration shaft and the housing body. This dual-bearing packaged electric toothbrush motor, with its first and second bearings, provides double support for the vibration shaft, effectively reducing wobbling and offset of the vibration shaft during high-speed operation, ensuring the stability and accuracy of the electric toothbrush vibration, and improving cleaning effect. Simultaneously, the bearings share the force on the shaft, reducing wear and extending the motor's service life. The second bearing engages with a locking rod through a positioning hole and is further reinforced by a stabilizing cover, further enhancing structural stability and ensuring the motor remains stable under long-term high-frequency vibration operation.

Description

Technical Field

[0001] This utility model relates to the technical field of electric toothbrush motors, specifically a dual-bearing packaged electric toothbrush motor. Background Technology

[0002] An electric toothbrush mainly consists of a motor and a brush head. The motor's rapid rotation causes the brush head to vibrate at high frequency, instantly breaking down toothpaste into fine foam that deeply cleans between teeth. At the same time, the vibration of the bristles on the brush head promotes blood circulation in the mouth and has a certain massaging effect on the gum tissue. Therefore, the motor is a major component of an electric toothbrush.

[0003] According to the authorized patent "CN215956180U", a dual-bearing packaged electric toothbrush motor includes a housing and a motor shaft. The housing includes a first housing and a second housing arranged axially opposite to each other along the motor shaft. The motor shaft is rotatably supported in the first housing by a first bearing and rotatably supported in the second housing by a second bearing. The first housing has a first mounting groove in which the first bearing is housed. The second housing has a second mounting groove in which the second bearing is housed. The first housing and the second housing are clamped together by pressing the first housing inward with the first bearing and the second housing inward with the second bearing. When assembling the motor shaft and the first housing, as well as the motor shaft and the second housing, it is only necessary to hammer the first bearing into the first housing from the outside and the second bearing into the second housing from the outside, respectively. This single riveting completes the product packaging and bearing installation, saving assembly steps and improving assembly efficiency.

[0004] In the aforementioned technical solutions, some electric toothbrush motors employ a single-bearing structure. Due to the lack of sufficient support, the vibrating shaft is prone to wobbling and misalignment during high-speed operation. This not only leads to unstable vibration of the electric toothbrush, affecting cleaning performance, but also causes excessive friction between the shaft and other components, accelerating wear and shortening the motor's lifespan.

[0005] Therefore, this utility model provides a motor for an electric toothbrush with a dual-bearing package. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a dual-bearing packaged motor for electric toothbrushes to solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a motor for an electric toothbrush with dual bearing encapsulation, comprising a housing body, an electric motor installed inside the housing body, a vibration shaft fixedly connected to the output end of the electric motor, a first bearing provided on the top of the electric motor, a second bearing provided at the connection between the vibration shaft and the housing body, a positioning hole provided in the side wall of the second bearing, a snap-fit ​​rod movably connected inside the housing body, and a stabilizing cover fixedly connected to the outer end of the snap-fit ​​rod.

[0008] Preferably, a heat dissipation mechanism is provided on the outer side of the outer shell body, the heat dissipation mechanism includes heat dissipation holes, a movable groove is provided in the side wall of the outer shell body, a slider is slidably engaged inside the movable groove, a baffle plate is fixedly connected to the outer side of the slider, a return spring is fixedly connected to the top of the slider, an L-shaped plate is fixedly connected to the outer side of the outer shell body, a threaded tube is fixedly connected to the outer side of the L-shaped plate, a screw is threadedly connected inside the threaded tube, a fixing rod is fixedly connected to the outer side of the screw, and a snap-fit ​​hole is provided in the side wall of the baffle plate.

[0009] Preferably, the top of the vibration shaft is located on the top outer side of the outer casing, and the first bearing is located inside the outer casing.

[0010] Preferably, the second bearing is located at the top of the housing body, and the positioning holes are symmetrically distributed in the side wall of the second bearing.

[0011] Preferably, the snap-fit ​​rod is adapted to the positioning hole, and the stabilizing cover is movably connected to the outside of the outer shell body.

[0012] Preferably, the heat dissipation holes are evenly distributed on the inner wall of the outer casing, and the area of ​​the shielding plate is greater than the total area of ​​the heat dissipation holes.

[0013] Preferably, the shield is movably connected to the outside of the heat dissipation hole through the cooperation of a slider and a return spring.

[0014] Preferably, the L-shaped plate is located above the baffle plate, and the fixing rod is adapted to the snap-fit ​​hole.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) The electric toothbrush motor with dual bearing package has a design of bearing No. 1 and bearing No. 2, which provides double support for the vibration shaft, effectively reducing the shaking and deviation of the vibration shaft when it is running at high speed, ensuring the stability and accuracy of the electric toothbrush vibration, and improving the cleaning effect; at the same time, the bearings share the force of the shaft, reduce wear, and extend the service life of the motor. The bearing No. 2 is matched with the locking rod through the positioning hole and reinforced by the stabilizing cover, further enhancing the structural stability and ensuring that the motor remains stable under long-term high-frequency vibration operation.

[0018] (2) The electric toothbrush motor with dual bearing package has heat dissipation holes in the heat dissipation mechanism that can dissipate the heat generated by the electric motor in time, preventing performance degradation or component damage due to overheating; the baffle plate can be flexibly adjusted in opening and closing state through the cooperation of slider, return spring and L-shaped plate, threaded tube, screw, fixing rod and other components. When the electric toothbrush is in use, the baffle plate can be opened to fully dissipate heat, and when not in use, the baffle plate can be closed to prevent dust, water stains and other substances from entering the inner shell and affecting the motor performance and service life, thus realizing the dual functions of heat dissipation and protection. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the heat dissipation hole of this utility model when it is open;

[0021] Figure 3 This is a schematic diagram of the structure between the electric motor and the outer casing of this utility model;

[0022] Figure 4 This is a schematic diagram of the external structure of the heat dissipation mechanism of this utility model.

[0023] In the diagram: 1. Outer shell; 2. Electric motor; 21. Vibration shaft; 22. Bearing No. 1; 23. Bearing No. 2; 24. Positioning hole; 25. Snap-fit ​​rod; 26. Stabilizing cover; 3. Heat dissipation mechanism; 31. Heat dissipation hole; 32. Moving groove; 33. Slider; 34. Baffle plate; 35. Return spring; 36. L-shaped plate; 37. Threaded tube; 38. Screw; 39. Fixing rod; 310. Snap-fit ​​hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 A dual-bearing encapsulated electric toothbrush motor includes a housing body 1, an electric motor 2 installed inside the housing body 1, a vibration shaft 21 fixedly connected to the output end of the electric motor 2, a first bearing 22 provided on the top of the electric motor 2, a second bearing 23 provided at the connection between the vibration shaft 21 and the housing body 1, a positioning hole 24 provided in the side wall of the second bearing 23, a snap-fit ​​rod 25 movably connected inside the housing body 1, and a retaining cover 26 fixedly connected to the outer end of the snap-fit ​​rod 25.

[0026] Furthermore: the top of the vibration shaft 21 is located on the top outer side of the outer shell 1, the first bearing 22 is located inside the outer shell 1, the second bearing 23 is located on the top of the outer shell 1, the positioning holes 24 are symmetrically distributed in the side wall of the second bearing 23, the snap-fit ​​rod 25 is adapted to the positioning hole 24, and the stabilizing cover 26 is movably connected to the outside of the outer shell 1.

[0027] It should be noted that: Bearing 22 is mounted on top of the electric motor 2, and its main function is to bear axial force. During the operation of the electric motor 2, it can effectively limit the axial movement of the vibrating shaft 21, establish a stable vertical support benchmark for the shaft, and ensure the accuracy of its rotation direction. Bearing 23 is located at the connection between the vibrating shaft 21 and the outer casing 1, and focuses on bearing radial force. When the shaft rotates at high speed and generates centrifugal force, bearing 23, through precise positioning and support, prevents radial displacement of the shaft and ensures its stable operation.

[0028] Specifically, the stabilizing cover 26 is connected to the locking rod 25 and wraps around the outside of the housing body 1. It not only provides physical protection but also disperses external impact forces on the bearings and shafts. For example, when an electric toothbrush is accidentally dropped, the stabilizing cover 26 can effectively buffer external forces, protect the bearings and shafts, and extend the motor's service life.

[0029] As a further improvement of this utility model, a heat dissipation mechanism 3 is provided on the outer side of the outer shell body 1. The heat dissipation mechanism 3 includes heat dissipation holes 31. A moving groove 32 is provided in the side wall of the outer shell body 1. A slider 33 is slidably engaged inside the moving groove 32. A baffle plate 34 is fixedly connected to the outer side of the slider 33. A return spring 35 is fixedly connected to the top of the slider 33. An L-shaped plate 36 is fixedly connected to the outer side of the outer shell body 1. A threaded tube 37 is fixedly connected to the outer side of the L-shaped plate 36. A screw 38 is threadedly connected inside the threaded tube 37. A fixing rod 39 is fixedly connected to the outer side of the screw 38. A snap-fit ​​hole 310 is provided in the side wall of the baffle plate 34.

[0030] Furthermore: the heat dissipation holes 31 are evenly distributed in the inner wall of the outer shell body 1, the area of ​​the baffle plate 34 is greater than the total area of ​​the heat dissipation holes 31, the baffle plate 34 is movably connected to the outside of the heat dissipation holes 31 through the cooperation of the slider 33 and the return spring 35, the L-shaped plate 36 is located above the baffle plate 34, and the fixing rod 39 is adapted to the snap-fit ​​hole 310.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] Working Principle: In terms of power transmission, after the electric motor 2 is powered on, its internal electromagnetic system drives the rotor to rotate. The rotation of the rotor is transmitted to the vibrating shaft 21 through the output end, causing the vibrating shaft 21 to rotate at high speed. Since a first bearing 22 is installed on the top of the electric motor 2, located inside the outer casing 1, it effectively reduces the friction and resistance generated when the output end of the electric motor 2 rotates, providing support for the stable operation of the electric motor 2 and ensuring smooth power output. Simultaneously, a second bearing 23 is installed at the connection between the vibrating shaft 21 and the outer casing 1, located on the top of the outer casing 1. This second bearing 23 further reduces the friction between the vibrating shaft 21 and the outer casing 1 during rotation and also serves a positioning and support function, enabling the vibrating shaft 21 to maintain a stable rotational trajectory. This accurately and efficiently transmits the power of the electric motor 2 to the outside, driving the electric toothbrush head to achieve high-frequency vibration and complete the function of cleaning teeth.

[0033] In the bearing fixing process, positioning holes 24 are provided in the side wall of bearing 23, and the positioning holes 24 are symmetrically distributed in the side wall of bearing 23. A snap-fit ​​rod 25 is movably connected inside the outer casing 1, and the snap-fit ​​rod 25 is adapted to the positioning holes 24. When installing bearing 23, the snap-fit ​​rod 25 is aligned with the positioning hole 24, and then bearing 23 is pushed. The snap-fit ​​rod 25 snaps into the positioning hole 24 under its own elasticity or external force, thus achieving a fixed connection between bearing 23 and outer casing 1. Simultaneously, a retaining cover 26 is fixedly connected to the outer side of the snap-fit ​​rod 25. The retaining cover 26 is movably connected to the outside of the outer casing 1. It protects and reinforces the snap-fit ​​rod 25, preventing it from loosening due to external impact or vibration during use, further enhancing the stability of bearing 23 and ensuring the reliability of the entire motor structure.

[0034] For the heat dissipation mechanism 3, when the electric motor 2 is working, it generates a large amount of heat, at which time the heat dissipation holes 31 come into play. The heat dissipation holes 31 are evenly distributed in the inner wall of the outer shell body 1. Heat is conducted through the outer shell body 1 to the heat dissipation holes 31, where it exchanges heat with the outside air to achieve heat dissipation. In some dusty or humid environments, in order to prevent dust, moisture, etc. from entering the inner shell body 1 and affecting the normal operation of the motor, the opening and closing of the heat dissipation holes 31 can be controlled by adjusting the heat dissipation mechanism 3. In specific operation, rotating the screw 38 will cause the screw 38 to move up and down in the threaded tube 37, since the screw 38 is threadedly connected to the threaded tube 37. When the screw 38 moves downward, the fixing rod 39 disengages from the snap-fit ​​hole 310 in the side wall of the baffle plate 34. At this time, the baffle plate 34 moves upward under the elastic force of the return spring 35, and slides in the moving groove 32 via the slider 33, gradually covering the heat dissipation hole 31, thus sealing the heat dissipation hole 31. When heat dissipation is needed, the screw 38 is rotated in the opposite direction, causing the screw 38 to move upward, driving the fixing rod 39 to move upward. The fixing rod 39 inserts into the snap-fit ​​hole 310, pulling the baffle plate 34 downward, exposing the heat dissipation hole 31, and restoring the heat dissipation function. Since the area of ​​the baffle plate 34 is greater than the total area of ​​the heat dissipation holes 31, it can completely cover the heat dissipation holes 31, effectively providing protection.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor for an electric toothbrush with a dual-bearing package, comprising a housing body (1), characterized in that: An electric motor (2) is installed inside the outer shell body (1). The output end of the electric motor (2) is fixedly connected to a vibration shaft (21). A first bearing (22) is provided on the top of the electric motor (2). A second bearing (23) is provided at the connection between the vibration shaft (21) and the outer shell body (1). A positioning hole (24) is provided in the side wall of the second bearing (23). A snap-fit ​​rod (25) is movably connected inside the outer shell body (1). A stabilizing cover (26) is fixedly connected to the outside of the snap-fit ​​rod (25).

2. The electric toothbrush motor with dual bearing encapsulation according to claim 1, characterized in that: A heat dissipation mechanism (3) is provided on the outer side of the outer shell body (1). The heat dissipation mechanism (3) includes heat dissipation holes (31). A moving groove (32) is provided in the side wall of the outer shell body (1). A slider (33) is slidably engaged inside the moving groove (32). A baffle plate (34) is fixedly connected to the outer side of the slider (33). A return spring (35) is fixedly connected to the top of the slider (33). An L-shaped plate (36) is fixedly connected to the outer side of the outer shell body (1). A threaded tube (37) is fixedly connected to the outer side of the L-shaped plate (36). A screw (38) is threadedly connected inside the threaded tube (37). A fixing rod (39) is fixedly connected to the outer side of the screw (38). A snap-fit ​​hole (310) is provided in the side wall of the baffle plate (34).

3. The electric toothbrush motor with dual bearing encapsulation according to claim 1, characterized in that: The top of the vibration shaft (21) is located on the top outer side of the outer shell body (1), and the first bearing (22) is located inside the outer shell body (1).

4. The electric toothbrush motor with dual bearing encapsulation according to claim 1, characterized in that: The second bearing (23) is located at the top of the outer shell body (1), and the positioning holes (24) are symmetrically distributed in the side wall of the second bearing (23).

5. The electric toothbrush motor with dual bearing encapsulation according to claim 1, characterized in that: The snap-fit ​​rod (25) is adapted to the positioning hole (24), and the stabilizing cover (26) is movably connected to the outside of the outer shell body (1).

6. The electric toothbrush motor with dual bearing encapsulation according to claim 2, characterized in that: The heat dissipation holes (31) are evenly distributed in the inner wall of the outer shell body (1), and the area of ​​the shielding plate (34) is greater than the total area of ​​the heat dissipation holes (31).

7. A dual-bearing packaged electric toothbrush motor according to claim 2, characterized in that: The shield (34) is movably connected to the outside of the heat dissipation hole (31) through the cooperation of the slider (33) and the return spring (35).

8. A motor for an electric toothbrush with a dual-bearing package according to claim 2, characterized in that: The L-shaped plate (36) is located above the shielding plate (34), and the fixing rod (39) is adapted to the snap-fit ​​hole (310).

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